/**
 * Dingdong🔔 LMS — 프론트엔드 스타일시트 v6.9.7
 *
 * 컬러 테마: Pastel Rainbow + 중국풍 포인트
 * v6.9.7: 전체 컬러 파스텔 톤 전환 — 부드러운 파스텔 기반 + 중국풍 악센트
 */

/* === CSS 변수 === */
:root {
    --dingdong-primary: #C75B7A;
    --dingdong-primary-hover: #B04A68;
    --dingdong-primary-light: rgba(199, 91, 122, 0.08);
    --dingdong-secondary: #7BAFD4;
    --dingdong-secondary-hover: #6A9EC3;
    --dingdong-accent: #D4A84B;
    --dingdong-accent-light: #FDF8EB;
    --dingdong-success: #6BAF8D;
    --dingdong-error: #C75B7A;
    --dingdong-warning: #D4A84B;
    --dingdong-bg: #FAFAF8;
    --dingdong-card-bg: #FFFFFF;
    --dingdong-text: #3D3D4E;
    --dingdong-text-light: #8B8BA3;
    --dingdong-border: #E8E4F0;
    --dingdong-radius: 12px;
    --dingdong-shadow: 0 1px 3px rgba(0, 0, 0, 0.03), 0 1px 2px rgba(0, 0, 0, 0.04);
    --dingdong-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.03);
    --dingdong-shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.03);
    --dingdong-shadow-glow: 0 0 20px rgba(199, 91, 122, 0.1);
    --dingdong-font-zh: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --dingdong-font-ko: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* v6.9 토큰 */
    --dingdong-glass: rgba(255, 255, 255, 0.72);
    --dingdong-glass-border: rgba(219, 205, 240, 0.35);
    --dingdong-glass-blur: 16px;
    --dingdong-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --dingdong-transition-spring: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* 파스텔 레인보우 팔레트 */
    --pastel-yellow: #FAEDCB;
    --pastel-mint: #C9E4DE;
    --pastel-blue: #C6DEF1;
    --pastel-lavender: #DBCDF0;
    --pastel-pink: #F2C6DE;
    --pastel-peach: #F7D9C4;

    /* 성조 컬러 (파스텔 톤) */
    --tone-1: #C75B7A;
    --tone-2: #D4A84B;
    --tone-3: #6BAF8D;
    --tone-4: #5B7BA5;
    --tone-5: #A0A0B8;

    /* 대시보드 헤더 (파스텔 퍼플 그라데이션) */
    --dingdong-header-gradient: linear-gradient(135deg, #6B5B95 0%, #8E7CC3 40%, #B39DDB 100%);
}

/* === 테마 프리셋 === */
/* 클래식 (파스텔 기본값) */
[data-dingdong-theme="classic"] {
    --dingdong-primary: #C75B7A;
    --dingdong-primary-hover: #B04A68;
    --dingdong-primary-light: rgba(199, 91, 122, 0.08);
    --dingdong-secondary: #7BAFD4;
    --dingdong-accent: #D4A84B;
    --dingdong-header-gradient: linear-gradient(135deg, #6B5B95 0%, #8E7CC3 40%, #B39DDB 100%);
}

/* 오션 블루 */
[data-dingdong-theme="ocean"] {
    --dingdong-primary: #2563EB;
    --dingdong-primary-hover: #1D4ED8;
    --dingdong-primary-light: rgba(37, 99, 235, 0.06);
    --dingdong-secondary: #7BAFD4;
    --dingdong-accent: #38BDF8;
    --dingdong-success: #0D9488;
    --dingdong-error: #DC2626;
    --dingdong-warning: #F59E0B;
    --dingdong-bg: #F8FAFF;
    --dingdong-border: #E0E7F1;
    --dingdong-header-gradient: linear-gradient(135deg, #4A7AB5 0%, #7BAFD4 50%, #A8D8EA 100%);
}

/* 포레스트 그린 */
[data-dingdong-theme="forest"] {
    --dingdong-primary: #047857;
    --dingdong-primary-hover: #065F46;
    --dingdong-primary-light: rgba(4, 120, 87, 0.06);
    --dingdong-secondary: #6BAF8D;
    --dingdong-accent: #34D399;
    --dingdong-success: #059669;
    --dingdong-error: #DC2626;
    --dingdong-warning: #D97706;
    --dingdong-bg: #F5FAF7;
    --dingdong-border: #D5E5DC;
    --dingdong-header-gradient: linear-gradient(135deg, #3D8B6B 0%, #6BAF8D 50%, #A8D8C0 100%);
}

/* 바이올렛 */
[data-dingdong-theme="violet"] {
    --dingdong-primary: #6D28D9;
    --dingdong-primary-hover: #5B21B6;
    --dingdong-primary-light: rgba(109, 40, 217, 0.07);
    --dingdong-secondary: #9B8EC4;
    --dingdong-accent: #A78BFA;
    --dingdong-success: #2D8B55;
    --dingdong-error: #DC2626;
    --dingdong-warning: #F59E0B;
    --dingdong-header-gradient: linear-gradient(135deg, #6B5B95 0%, #9B8EC4 50%, #C4B5E0 100%);
}

/* 로즈 핑크 */
[data-dingdong-theme="rose"] {
    --dingdong-primary: #BE185D;
    --dingdong-primary-hover: #9D174D;
    --dingdong-primary-light: rgba(190, 24, 93, 0.06);
    --dingdong-secondary: #D4879E;
    --dingdong-accent: #F9A8D4;
    --dingdong-success: #2D8B55;
    --dingdong-error: #E11D48;
    --dingdong-warning: #F59E0B;
    --dingdong-bg: #FDF2F8;
    --dingdong-border: #F3E8EF;
    --dingdong-header-gradient: linear-gradient(135deg, #B06A8A 0%, #D4879E 50%, #F2C6DE 100%);
}

/* 웜 베이지 */
[data-dingdong-theme="warm"] {
    --dingdong-primary: #92400E;
    --dingdong-primary-hover: #78350F;
    --dingdong-primary-light: rgba(146, 64, 14, 0.06);
    --dingdong-secondary: #B89A7A;
    --dingdong-accent: #D6A756;
    --dingdong-success: #3F6212;
    --dingdong-error: #C2410C;
    --dingdong-warning: #CA8A04;
    --dingdong-bg: #FAF8F5;
    --dingdong-border: #E7E0D8;
    --dingdong-header-gradient: linear-gradient(135deg, #8B7355 0%, #B89A7A 50%, #D8C4A8 100%);
}

/* 써니 옐로우 */
[data-dingdong-theme="sunny"] {
    --dingdong-primary: #A16207;
    --dingdong-primary-hover: #854D0E;
    --dingdong-primary-light: rgba(161, 98, 7, 0.06);
    --dingdong-secondary: #C4A84D;
    --dingdong-accent: #FACC15;
    --dingdong-success: #15803D;
    --dingdong-error: #DC2626;
    --dingdong-warning: #EA580C;
    --dingdong-bg: #FEFCE8;
    --dingdong-border: #E8E4D0;
    --dingdong-header-gradient: linear-gradient(135deg, #A18540 0%, #C4A84D 50%, #E8D48A 100%);
}

/* 테마 피커 UI */
.dd-theme-picker { display: flex; gap: 10px; flex-wrap: wrap; }
.dd-theme-btn {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 10px 16px; border: 2px solid var(--dingdong-border); border-radius: 12px;
    background: var(--dingdong-card-bg); cursor: pointer; font-size: 0.82rem;
    color: var(--dingdong-text); transition: all 0.15s; min-width: 80px;
}
.dd-theme-btn span {
    width: 36px; height: 36px; border-radius: 50%; display: block;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}
.dd-theme-btn:hover { border-color: var(--dingdong-primary); transform: translateY(-1px); }
.dd-theme-btn.active { border-color: var(--dingdong-primary); box-shadow: 0 0 0 3px var(--dingdong-primary-light); }

/* 다크 모드 */
@media (prefers-color-scheme: dark) {
    :root {
        --dingdong-bg: #1A1B1E;
        --dingdong-card-bg: #242529;
        --dingdong-text: #E5E7EB;
        --dingdong-text-light: #9CA3AF;
        --dingdong-border: #374151;
        --dingdong-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
        --dingdong-primary-light: rgba(184, 59, 59, 0.15);
        --dingdong-accent-light: rgba(201, 168, 76, 0.12);
    }

    /* 다크 모드 전역 오버라이드 */
    .dd-dashboard-wrap { background: var(--dingdong-bg) !important; color: var(--dingdong-text); }
    .dd-sidebar { background: #1F2023 !important; border-color: var(--dingdong-border) !important; }
    .dd-sidebar-item { color: var(--dingdong-text-light) !important; }
    .dd-sidebar-item:hover, .dd-sidebar-item.active { background: var(--dingdong-primary-light) !important; color: var(--dingdong-primary) !important; }
    .dingdong-card { background: var(--dingdong-card-bg) !important; border-color: var(--dingdong-border) !important; color: var(--dingdong-text) !important; }
    .dingdong-input, .dingdong-input:focus { background: #2D2E33 !important; color: var(--dingdong-text) !important; border-color: var(--dingdong-border) !important; }
    .dd-main { color: var(--dingdong-text); }
    .dd-stats-row .dd-stat-card { background: var(--dingdong-card-bg); border-color: var(--dingdong-border); }
    .dd-stat-label { color: var(--dingdong-text-light) !important; }

    /* 레슨 페이지 */
    .dd-lesson-wrap { background: var(--dingdong-bg); }
    .dd-lesson-sidebar { background: #1F2023 !important; border-color: var(--dingdong-border) !important; }
    .dd-lesson { color: var(--dingdong-text); }
    .dd-body { color: var(--dingdong-text); }

    /* 코스 카드 */
    .dd-course-card, .dd-archive-card { background: var(--dingdong-card-bg) !important; border-color: var(--dingdong-border) !important; color: var(--dingdong-text) !important; }
    .dd-course-thumb { background: #2D2E33 !important; }

    /* 어휘/문법 */
    .dd-vocab-row { background: var(--dingdong-card-bg); border-color: var(--dingdong-border); }
    .dd-grammar-item { background: var(--dingdong-card-bg); border-color: var(--dingdong-border); }
    .dd-grammar-examples { background: #2D2E33 !important; }

    /* 숏카드 플레이어 */
    .dd-card-player-wrap { border-color: var(--dingdong-primary) !important; }
    .dd-sc-line { background: #2D2E33 !important; }
    .dd-flash-card { background: #2D2E33 !important; border-color: var(--dingdong-border) !important; }
    .dd-sc-grammar-pattern { background: #3A2D1A !important; }
    .dd-sc-key { background: #3A2D1A !important; }
    .dd-sc-quiz-opt { background: var(--dingdong-card-bg) !important; border-color: var(--dingdong-border) !important; color: var(--dingdong-text) !important; }
    .dd-sc-rp-turn { background: #1A2533 !important; }

    /* 모달 */
    .dd-modal { background: var(--dingdong-card-bg) !important; color: var(--dingdong-text) !important; }
    .dd-modal-overlay { background: rgba(0,0,0,0.7) !important; }

    /* 테이블 */
    .dd-analytics-table { border-color: var(--dingdong-border) !important; }
    .dd-analytics-table th { background: #2D2E33 !important; color: var(--dingdong-text-light) !important; }
    .dd-analytics-table td { border-color: #374151 !important; }

    /* 태그/뱃지 */
    .dd-tag-btn { background: #2D2E33 !important; color: var(--dingdong-text-light) !important; border-color: var(--dingdong-border) !important; }

    /* 인라인 편집 */
    .dd-item-row { background: #2D2E33 !important; border-color: var(--dingdong-border) !important; }
    .dd-lesson-row { background: #2D2E33 !important; border-color: var(--dingdong-border) !important; }
    .dd-card-section { background: #1F2023 !important; border-color: var(--dingdong-border) !important; }
}

/* === 기본 컨테이너 === */
.dingdong-auth-container,
.dingdong-dashboard-container,
.dingdong-tutor-container {
    font-family: var(--dingdong-font-ko);
    color: var(--dingdong-text);
    max-width: 480px;
    margin: 40px auto;
    padding: 0 16px;
}

.dingdong-dashboard-container {
    max-width: 960px;
}

/* === 알림 === */
.dingdong-notice {
    background: var(--dingdong-card-bg);
    border: 1px solid var(--dingdong-border);
    border-left: 4px solid var(--dingdong-primary);
    border-radius: var(--dingdong-radius);
    padding: 16px 20px;
    margin: 20px 0;
    font-size: 14px;
}

/* === 카드 === */
.dingdong-card {
    background: var(--dingdong-glass);
    backdrop-filter: blur(var(--dingdong-glass-blur));
    -webkit-backdrop-filter: blur(var(--dingdong-glass-blur));
    border: 1px solid var(--dingdong-glass-border);
    border-radius: var(--dingdong-radius);
    box-shadow: var(--dingdong-shadow), inset 0 1px 0 rgba(255,255,255,0.5);
    padding: 24px;
    margin-bottom: 16px;
    transition: box-shadow var(--dingdong-transition), transform var(--dingdong-transition);
    position: relative;
    overflow: hidden;
}

.dingdong-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--dingdong-primary), var(--dingdong-accent), transparent);
    opacity: 0;
    transition: opacity var(--dingdong-transition);
}

.dingdong-card:hover {
    box-shadow: var(--dingdong-shadow-md), inset 0 1px 0 rgba(255,255,255,0.5);
    transform: translateY(-1px);
}

.dingdong-card:hover::before {
    opacity: 0.6;
}

/* === 버튼 === */
.dingdong-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--dingdong-transition);
    text-decoration: none;
    line-height: 1.4;
    position: relative;
    overflow: hidden;
}

.dingdong-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity var(--dingdong-transition);
}

.dingdong-btn:hover::after {
    opacity: 1;
}

.dingdong-btn-primary {
    background: linear-gradient(135deg, var(--dingdong-primary), #D44E4E);
    color: #FFFFFF;
    box-shadow: 0 4px 14px rgba(184, 59, 59, 0.25);
}

.dingdong-btn-primary:hover {
    background: linear-gradient(135deg, var(--dingdong-primary-hover), #C03A3A);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(184, 59, 59, 0.35);
}

.dingdong-btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(184, 59, 59, 0.2);
}

.dingdong-btn-secondary {
    background: linear-gradient(135deg, var(--dingdong-secondary), #3D5266);
    color: #FFFFFF;
    box-shadow: 0 4px 14px rgba(44, 62, 80, 0.2);
}

.dingdong-btn-secondary:hover {
    background: linear-gradient(135deg, var(--dingdong-secondary-hover), #4A6478);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(44, 62, 80, 0.3);
}

.dingdong-btn-outline {
    background: transparent;
    color: var(--dingdong-primary);
    border: 2px solid var(--dingdong-primary);
    box-shadow: none;
}

.dingdong-btn-outline:hover {
    background: var(--dingdong-primary);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(184, 59, 59, 0.2);
}

.dingdong-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.dingdong-btn-full {
    width: 100%;
}

/* === 폼 === */
.dingdong-form-group {
    margin-bottom: 16px;
}

.dingdong-form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--dingdong-text);
}

.dingdong-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--dingdong-border);
    border-radius: 8px;
    font-size: 15px;
    font-family: var(--dingdong-font-ko);
    color: var(--dingdong-text);
    background: var(--dingdong-card-bg);
    transition: border-color 0.2s ease;
    box-sizing: border-box;
}

.dingdong-input:focus {
    outline: none;
    border-color: var(--dingdong-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15);
}

.dingdong-input.error {
    border-color: var(--dingdong-error);
}

.dingdong-form-error {
    color: var(--dingdong-error);
    font-size: 13px;
    margin-top: 4px;
}

.dingdong-form-hint {
    color: var(--dingdong-text-light);
    font-size: 13px;
    margin-top: 4px;
}

/* === 중국어 텍스트 === */
.dingdong-zh {
    font-family: var(--dingdong-font-zh);
}

/* 병음 Ruby Annotation */
.dingdong-zh ruby {
    ruby-position: over;
}

.dingdong-zh ruby rt {
    font-size: 0.55em;
    color: var(--dingdong-text-light);
    font-family: var(--dingdong-font-ko);
}

/* 성조 컬러링 */
.dingdong-tone-1 { color: var(--tone-1); }
.dingdong-tone-2 { color: var(--tone-2); }
.dingdong-tone-3 { color: var(--tone-3); }
.dingdong-tone-4 { color: var(--tone-4); }
.dingdong-tone-5 { color: var(--tone-5); }

/* === 로딩 스피너 === */
.dingdong-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--dingdong-border);
    border-top-color: var(--dingdong-primary);
    border-radius: 50%;
    animation: dingdong-spin 0.6s linear infinite;
}

@keyframes dingdong-spin {
    to { transform: rotate(360deg); }
}

/* === 반응형 === */
@media (max-width: 768px) {
    .dingdong-auth-container,
    .dingdong-dashboard-container {
        margin: 20px auto;
        padding: 0 12px;
    }

    .dingdong-card {
        padding: 16px;
    }

    .dingdong-tutor-panel {
        width: 100% !important;
        right: 0 !important;
        bottom: 0 !important;
        border-radius: 16px 16px 0 0 !important;
        height: 85vh !important;
    }

    .dingdong-stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

/* === 대시보드 === */
.dingdong-dashboard {
    max-width: 960px;
    margin: 0 auto;
    font-family: var(--dingdong-font-ko);
}

.dingdong-dash-header {
    background: var(--dingdong-header-gradient, linear-gradient(135deg, #6B5B95 0%, #8E7CC3 50%, #B39DDB 100%));
    border-radius: 14px;
    padding: 28px 32px;
    color: #fff;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}
.dingdong-dash-header::before {
    content: '🔔';
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 64px;
    opacity: 0.08;
    pointer-events: none;
}

.dingdong-logout-btn {
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.4);
    color: #fff;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}
.dingdong-logout-btn:hover {
    background: rgba(255,255,255,0.35);
}

.dingdong-dash-header h2 {
    margin: 0 0 4px; font-size: 22px;
}

.dingdong-dash-header p {
    margin: 0; opacity: 0.9; font-size: 14px;
}

.dingdong-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.dingdong-stat-card {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(232,229,223,0.5);
    border-radius: 12px;
    padding: 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.dingdong-stat-highlight {
    border-color: var(--dingdong-primary);
    background: rgba(184,59,59,0.04);
    box-shadow: 0 2px 8px rgba(184,59,59,0.08);
}

.dingdong-stat-icon { font-size: 32px; }
.dingdong-stat-value { font-size: 22px; font-weight: 800; color: var(--dingdong-text); }
.dingdong-stat-label { font-size: 12px; color: var(--dingdong-text-light); margin-top: 2px; }
a.dingdong-stat-card { cursor: pointer; text-decoration: none !important; color: inherit !important; }
a.dingdong-stat-card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.08); border-color: var(--dingdong-primary); }

.dingdong-course-list { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }

.dingdong-course-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px 16px;
    border: 1px solid var(--dingdong-border);
    border-radius: 8px;
    gap: 16px;
}

.dingdong-course-item h4 { margin: 0 0 2px; font-size: 15px; }
.dingdong-course-subtitle { margin: 0; font-size: 13px; color: var(--dingdong-text-light); }
.dingdong-course-meta { display: flex; gap: 8px; align-items: center; margin-top: 4px; font-size: 12px; color: var(--dingdong-text-light); }

a.dingdong-course-link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
}

a.dingdong-course-link:hover {
    border-color: var(--dingdong-primary);
    box-shadow: 0 2px 12px rgba(255, 107, 53, 0.12);
}

a.dingdong-course-link:hover h4 {
    color: var(--dingdong-primary);
}

.dingdong-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    background: #C6DEF1 !important;
    color: #2A5278 !important;
    font-size: 11px;
    font-weight: 600;
    text-decoration: none !important;
}

.dingdong-progress-bar-wrap { display: flex; align-items: center; gap: 8px; min-width: 120px; }
.dingdong-progress-bar { flex: 1; height: 8px; background: var(--dingdong-border); border-radius: 4px; overflow: hidden; position: relative; }
.dingdong-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--dingdong-primary), #FF8F5E, var(--dingdong-accent));
    background-size: 200% 100%;
    border-radius: 4px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    animation: dingdong-progress-shimmer 2s ease infinite;
    position: relative;
}
.dingdong-progress-fill::after {
    content: '';
    position: absolute;
    top: 0; right: 0; bottom: 0;
    width: 20px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3));
    border-radius: 0 4px 4px 0;
}
@keyframes dingdong-progress-shimmer {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}
.dingdong-progress-text { font-size: 13px; font-weight: 600; color: var(--dingdong-primary); min-width: 36px; }

.dingdong-activity-list { margin-top: 12px; }
.dingdong-activity-item { display: flex; align-items: flex-start; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--dingdong-border); }
.dingdong-activity-item:last-child { border-bottom: none; }
.dingdong-activity-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.dingdong-activity-type { font-size: 11px; font-weight: 600; color: var(--dingdong-primary); margin-bottom: 2px; }
.dingdong-activity-title { font-size: 14px; color: var(--dingdong-text); line-height: 1.4; }

/* 전역 링크 밑줄 제거 */
.dingdong-dashboard a,
.dingdong-dashboard-content a,
.dd-dashboard-wrap a,
.dd-main a { text-decoration: none !important; }
.dingdong-dashboard a:hover,
.dd-main a:hover { text-decoration: none !important; }

/* ★★★ 테마 color 간섭 방지 — Dingdong 영역 CSS 격리 ★★★ */
/* 기본: 모든 Dingdong 요소에 텍스트 색상 강제 */
.dd-dashboard-wrap { color: var(--dingdong-text, #2C3039) !important; }
.dd-main { color: var(--dingdong-text, #2C3039) !important; }
.dd-home-wrap { color: var(--dingdong-text, #2C3039) !important; }

/* 라이트 배경 요소: 명시적 dark text */
.dingdong-card,
.dingdong-card p,
.dingdong-card h3,
.dingdong-card h4,
.dingdong-card span,
.dingdong-card small,
.dingdong-card label,
.dingdong-card div,
.dingdong-card button,
.dingdong-card input,
.dingdong-card select,
.dingdong-card textarea,
.dd-main > h2,
.dd-main > p,
.dd-main > div:not(.dd-profile-header):not(.dd-slide-viewer) {
    color: var(--dingdong-text, #2C3039) !important;
}

/* 버튼 전역 — 라이트 배경 위 */
.dd-dashboard-wrap button:not(.dingdong-btn-primary):not(.dd-logout-btn):not(.dd-slide-nav .dingdong-btn-outline),
.dd-main button:not(.dingdong-btn-primary):not(.dd-logout-btn) {
    color: var(--dingdong-text, #2C3039) !important;
}

/* Primary 버튼 — 흰 텍스트 */
.dingdong-btn-primary,
.dingdong-btn-primary span,
.dingdong-btn-primary * {
    color: #fff !important;
}

/* ★ 다크 배경 컨테이너 — 흰색 텍스트 (핵심 예외 목록) ★ */
.dd-profile-header,
.dd-profile-header *,
.dd-hero,
.dd-hero *,
.dd-stats,
.dd-stats *,
.dd-cta-inner,
.dd-cta-inner *,
.dd-mock-roleplay,
.dd-mock-roleplay *,
.dd-logout-btn,
.dingdong-tutor-bubble-user,
.dd-sc-rp-turn,
.dd-sc-rp-turn * {
    color: #fff !important;
}

/* 다크 배경 내 muted 텍스트 */
.dd-profile-header .dd-profile-meta { color: #E2E8F0 !important; }
.dd-hero-sub { color: rgba(255,255,255,0.65) !important; }
.dd-hero-badge { color: var(--dd-gold-light, #F2D98B) !important; }
.dd-profile-header .dd-stat-label { color: rgba(255,255,255,0.55) !important; }

/* 일반 영역 stat-label (밝은 배경) */
.dd-main .dd-stat-label { color: #718096 !important; }

/* 슬라이드 뷰어 (밝은 배경) 색상 */
.dd-slide-viewer, .dd-slide-viewer * { color: #2D3748 !important; }
.dd-slide-viewer .dd-slide-subtitle { color: #718096 !important; }
.dd-slide-viewer .dd-slide-ko { color: #4A5568 !important; }
.dd-slide-viewer .dd-slide-img-desc { color: #A0AEC0 !important; }
.dd-slide-nav .dingdong-btn-outline { color: #2C3E50 !important; }

/* 사이드바 */
.dd-sidebar .dd-sidebar-item { color: var(--dingdong-text, #2C3039) !important; }
.dd-sidebar .dd-sidebar-item.active { color: var(--dingdong-primary) !important; }

/* Outline 버튼 */
.dingdong-btn-outline { color: var(--dingdong-text, #2C3039) !important; }
.dd-hero .dingdong-btn-outline,
.dd-cta-inner .dingdong-btn-outline { color: #fff !important; }

.dingdong-text-light { color: var(--dingdong-text-light); }
.dingdong-text-success { color: var(--dingdong-success); }

.dingdong-empty { color: var(--dingdong-text-light); font-style: italic; }

.dingdong-quick-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.dingdong-btn-small { padding: 6px 14px; font-size: 13px; }

.dingdong-tutor-quick { border-left: 4px solid var(--dingdong-primary); }

/* === AI 튜터 채팅 위젯 === */
.dingdong-tutor-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--dingdong-primary), #FF8F5E);
    border: none;
    font-size: 26px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    padding: 0;
}

.dingdong-tutor-fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 28px rgba(255, 107, 53, 0.5);
}

.dingdong-tutor-panel {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 400px;
    height: 600px;
    background: var(--dingdong-card-bg);
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 99999;
    border: 1px solid var(--dingdong-border);
    animation: dingdong-slide-up 0.3s ease;
}

@keyframes dingdong-slide-up {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.dingdong-tutor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    background: linear-gradient(135deg, var(--dingdong-primary), #FF8F5E);
    color: #fff;
}

.dingdong-tutor-header strong { font-size: 15px; }
.dingdong-tutor-header small { opacity: 0.8; font-size: 12px; }
.dingdong-tutor-header-actions { display: flex; gap: 4px; }

.dingdong-tutor-btn-icon {
    background: rgba(255,255,255,0.2);
    border: none;
    color: #fff;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    line-height: 1;
}

.dingdong-tutor-btn-icon:hover { background: rgba(255,255,255,0.35); }

.dingdong-tutor-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.dingdong-tutor-msg {
    display: flex;
    gap: 8px;
    max-width: 85%;
}

.dingdong-tutor-msg-user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.dingdong-tutor-msg-assistant {
    align-self: flex-start;
}

.dingdong-tutor-msg-error {
    align-self: center;
}

.dingdong-tutor-avatar {
    font-size: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.dingdong-tutor-bubble {
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.5;
    word-break: break-word;
}

.dingdong-tutor-bubble-user {
    background: var(--dingdong-primary);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.dingdong-tutor-bubble-assistant {
    background: #F1F3F5;
    color: var(--dingdong-text);
    border-bottom-left-radius: 4px;
    font-family: var(--dingdong-font-zh);
}

.dingdong-tutor-bubble-error {
    background: #FEF2F2;
    color: var(--dingdong-error);
    font-size: 13px;
}

.dingdong-tutor-typing {
    display: inline-block;
    animation: dingdong-blink 1.2s infinite;
    color: var(--dingdong-text-light);
}

@keyframes dingdong-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.dingdong-tutor-quick {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 0 16px 8px;
}

.dingdong-tutor-quick-btn {
    padding: 5px 12px;
    font-size: 12px;
    border: 1px solid var(--dingdong-border);
    border-radius: 20px;
    background: var(--dingdong-card-bg);
    color: var(--dingdong-text);
    cursor: pointer;
    transition: all 0.2s;
}

.dingdong-tutor-quick-btn:hover {
    border-color: var(--dingdong-primary);
    color: var(--dingdong-primary);
}

.dingdong-tutor-input-area {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--dingdong-border);
}

.dingdong-tutor-input {
    flex: 1;
    border: 1px solid var(--dingdong-border);
    border-radius: 20px;
    padding: 10px 16px;
    font-size: 14px;
    font-family: var(--dingdong-font-zh);
    resize: none;
    outline: none;
    max-height: 80px;
}

.dingdong-tutor-input:focus {
    border-color: var(--dingdong-primary);
}

.dingdong-tutor-send {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: var(--dingdong-primary);
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    transition: background 0.2s;
    flex-shrink: 0;
}

.dingdong-tutor-send:hover { background: var(--dingdong-primary-hover); }
.dingdong-tutor-send:disabled { opacity: 0.4; cursor: not-allowed; }

/* === 인증 폼 === */
.dingdong-auth-box {
    background: var(--dingdong-card-bg);
    border-radius: var(--dingdong-radius);
    box-shadow: var(--dingdong-shadow);
    padding: 36px 32px;
    max-width: 420px;
    margin: 40px auto;
}

.dingdong-auth-header {
    text-align: center;
    margin-bottom: 24px;
}

.dingdong-auth-logo {
    font-size: 48px;
    margin-bottom: 8px;
}

.dingdong-auth-header h2 {
    margin: 0;
    font-size: 24px;
    font-family: var(--dingdong-font-zh);
}

.dingdong-auth-header p {
    margin: 4px 0 0;
    color: var(--dingdong-text-light);
    font-size: 14px;
}

.dingdong-auth-success {
    text-align: center;
    padding: 20px 0;
}

.dingdong-auth-success h2 {
    color: var(--dingdong-success);
    font-size: 18px;
}

.dingdong-form-error-box {
    background: #FEF2F2;
    border: 1px solid #FECACA;
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 16px;
    color: var(--dingdong-error);
    font-size: 14px;
}

.dingdong-input-group {
    display: flex;
    gap: 8px;
}

.dingdong-input-group .dingdong-input { flex: 1; }

.dingdong-radio-group {
    display: flex;
    gap: 16px;
    margin-top: 4px;
}

.dingdong-radio-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    cursor: pointer;
}

.dingdong-chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.dingdong-chip {
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--dingdong-border);
    background: var(--dingdong-card-bg);
    color: var(--dingdong-text);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.dingdong-chip:hover {
    border-color: var(--dingdong-primary);
}

.dingdong-chip-active {
    background: var(--dingdong-primary);
    color: #fff;
    border-color: var(--dingdong-primary);
}

.dingdong-auth-switch {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--dingdong-text-light);
}

.dingdong-link-btn {
    background: none;
    border: none;
    color: var(--dingdong-primary);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    padding: 0;
    margin-left: 4px;
}

.dingdong-link-btn:hover { text-decoration: underline; }

.dingdong-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 40px;
    color: var(--dingdong-text-light);
}

/* === 튜터 마크다운 렌더링 === */
.dingdong-tutor-bubble strong { font-weight: 700; }
.dingdong-tutor-bubble em { font-style: italic; }
.dingdong-tutor-bubble code {
    background: rgba(0,0,0,0.06);
    padding: 1px 5px;
    border-radius: 3px;
    font-family: 'Noto Sans SC', monospace;
    font-size: 0.92em;
}
.dingdong-tutor-bubble .dd-code {
    display: block;
    background: #1E293B;
    color: #E2E8F0;
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 13px;
    margin: 6px 0;
    overflow-x: auto;
    white-space: pre-wrap;
}
.dingdong-tutor-bubble-user code,
.dingdong-tutor-bubble-user .dd-code { background: rgba(255,255,255,0.2); color: #fff; }

/* ===================================================================
   v5 — 대시보드 사이드바 레이아웃 (TutorLMS 스타일)
   =================================================================== */

/* 대시보드 래퍼 */
.dd-dashboard-wrap { max-width: 1200px; margin: 0 auto; font-family: var(--dingdong-font-ko); color: var(--dingdong-text); }

/* === 대시보드 스코프 래퍼 === */
.dd-dashboard-wrap {
    background: var(--dingdong-bg, #FAF9F7);
    padding: 0;
    border-radius: 20px;
    overflow: hidden;
    margin-top: 20px;
    box-shadow: var(--dingdong-shadow-lg);
}
.dd-dashboard-wrap a { text-decoration: none; }
.dd-dashboard-wrap a:hover { text-decoration: none; }

/* 프로필 헤더 */
.dd-profile-header {
    display: flex; align-items: center; gap: 18px; padding: 24px 28px;
    background: var(--dingdong-header-gradient, linear-gradient(135deg, #6B5B95 0%, #B39DDB 100%));
    color: #fff; border-radius: 20px 20px 0 0;
    border-bottom: 3px solid var(--dingdong-accent);
    position: relative;
    overflow: hidden;
}
.dd-profile-header::before {
    content: '';
    position: absolute;
    top: -50%; right: -10%;
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(201,168,76,0.12) 0%, transparent 70%);
    pointer-events: none;
}
.dd-profile-header::after {
    content: '🔔';
    position: absolute;
    right: 28px; top: 50%;
    transform: translateY(-50%);
    font-size: 72px;
    opacity: 0.06;
    pointer-events: none;
    filter: grayscale(0.5);
}
.dd-profile-avatar img { border-radius: 50%; border: 3px solid rgba(255,255,255,0.4); }
.dd-profile-name { margin: 0; font-size: 22px; font-weight: 700; color: #FFFFFF; text-shadow: 0 1px 3px rgba(0,0,0,0.3); }
.dd-profile-meta { margin: 4px 0 0; font-size: 14px; color: #E2E8F0; }
.dd-badge-instructor { background: var(--dingdong-primary); padding: 2px 8px; border-radius: 10px; font-size: 12px; color: #fff; }
.dd-profile-actions { margin-left: auto; position: relative; z-index: 1; }
.dd-logout-btn {
    background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25);
    color: #fff; padding: 8px 16px; border-radius: 8px; cursor: pointer;
    font-size: 13px; transition: all var(--dingdong-transition);
    backdrop-filter: blur(8px);
}
.dd-logout-btn:hover { background: rgba(255,255,255,0.22); border-color: rgba(255,255,255,0.4); transform: translateY(-1px); }

/* 2컬럼 레이아웃 */
.dd-dashboard-layout {
    display: grid; grid-template-columns: 250px 1fr; gap: 0;
    min-height: 75vh; background: var(--dingdong-card-bg);
    border: 1px solid var(--dingdong-border);
    border-radius: 20px;
    overflow: hidden;
}
/* 프로필 헤더가 있는 대시보드에서는 상단 둥글기 제거 */
.dd-profile-header + .dd-dashboard-layout {
    border-top: none;
    border-radius: 0 0 20px 20px;
}

/* 사이드바 — 배경은 grid 셀 전체로 확장, 내용만 sticky */
.dd-sidebar {
    background: linear-gradient(180deg, #F8FAFC 0%, #F3F4F6 100%);
    border-right: 1px solid var(--dingdong-border);
    padding: 12px 0;
}
.dd-sidebar-nav {
    position: sticky; top: 32px;
    max-height: calc(100vh - 48px); overflow-y: auto;
}
/* 대시보드 사이드바 — 배경은 grid 전체, 내용만 sticky */
.dd-sidebar-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 20px;
    text-decoration: none; color: var(--dingdong-text); font-size: 14px;
    transition: all var(--dingdong-transition); border-left: 3px solid transparent;
    position: relative;
}
.dd-sidebar-item:hover { background: rgba(184,59,59,0.04); color: var(--dingdong-primary); }
.dd-sidebar-item.active {
    background: linear-gradient(90deg, rgba(184,59,59,0.08), rgba(184,59,59,0.02));
    color: var(--dingdong-primary);
    font-weight: 600; border-left-color: var(--dingdong-primary);
}
.dd-sidebar-item.active::after {
    content: '';
    position: absolute;
    right: 0; top: 50%;
    transform: translateY(-50%);
    width: 3px; height: 20px;
    background: var(--dingdong-primary);
    border-radius: 3px 0 0 3px;
    opacity: 0.4;
}
.dd-sidebar-icon { width: 20px; text-align: center; font-size: 15px; transition: transform var(--dingdong-transition-spring); }
.dd-sidebar-item:hover .dd-sidebar-icon { transform: scale(1.15); }
.dd-sidebar-sep { height: 1px; background: var(--dingdong-border); margin: 8px 20px; }
.dd-sidebar-sep span { font-size: 11px; color: var(--dingdong-text-light); display: block; margin-top: -6px; background: #F8FAFC; width: fit-content; padding: 0 8px; }

/* 메인 콘텐츠 */
.dd-main { padding: 24px 32px; min-width: 0; }
.dd-main h2 { margin: 0 0 16px; font-size: 22px; }

/* 코스 그리드 (내 코스 탭) */
.dd-course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
/* 수강 취소 버튼 래퍼 */
.dd-course-card-wrap { position: relative; display: flex; flex-direction: column; gap: 0; }
.dd-unenroll-btn {
    display: block; width: 100%;
    padding: 7px 0; font-size: 12px; font-weight: 600; letter-spacing: .3px;
    color: #ef4444; background: transparent;
    border: 1px solid rgba(239,68,68,0.35); border-top: none;
    border-radius: 0 0 14px 14px; cursor: pointer;
    transition: background .2s, color .2s;
    text-align: center;
}
.dd-unenroll-btn:hover { background: rgba(239,68,68,0.07); color: #dc2626; }
.dd-unenroll-btn:disabled { opacity: .5; cursor: not-allowed; }
.dd-course-card {
    display: flex; flex-direction: column;
    background: var(--dingdong-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 14px;
    overflow: hidden; text-decoration: none; color: var(--dingdong-text);
    transition: transform var(--dingdong-transition-spring), box-shadow var(--dingdong-transition);
}
.dd-course-card:hover { transform: translateY(-4px); box-shadow: var(--dingdong-shadow-lg); }
.dd-course-thumb {
    height: 140px; overflow: hidden; background: linear-gradient(135deg, #F0F0F0, #E8E8E8);
    display: flex; align-items: center; justify-content: center;
    position: relative;
}
.dd-course-thumb::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 40px;
    background: linear-gradient(transparent, rgba(255,255,255,0.8));
    pointer-events: none;
}
.dd-course-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.dd-course-card:hover .dd-course-thumb img { transform: scale(1.05); }
.dd-course-thumb-placeholder { font-size: 40px; color: var(--dingdong-text-light); }
.dd-course-card-body { padding: 14px; flex: 1; }
.dd-course-card-badges { display: flex; gap: 6px; margin-bottom: 6px; }
.dd-course-card-body h4 { margin: 0 0 4px; font-size: 16px; line-height: 1.3; }
.dd-course-card-ko { font-size: 13px; color: var(--dingdong-text-light); margin: 0 0 8px; }
.dd-course-card-progress { margin-top: auto; }
.dd-course-card-progress span { font-size: 12px; color: var(--dingdong-text-light); display: block; margin-top: 4px; }

/* 빈 상태 */
.dd-empty { text-align: center; color: var(--dingdong-text-light); padding: 24px 0; }

/* 플레이스홀더 (미구현 탭) */
.dd-placeholder { text-align: center; padding: 40px 20px; color: var(--dingdong-text-light); }
.dd-placeholder-note { font-size: 13px; margin-top: 8px; font-style: italic; }

/* 폼 그룹 */
.dd-form-group { margin-bottom: 16px; }
.dd-form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; color: var(--dingdong-text-light); }

/* 모바일: 사이드바 → 가로 스크롤 탭 */
@media (max-width: 768px) {
    .dd-profile-header { flex-wrap: wrap; border-radius: 0; padding: 16px; }
    .dd-dashboard-layout { grid-template-columns: 1fr; min-height: auto; border-radius: 0; }
    .dd-sidebar {
        position: static; height: auto; display: block; overflow-x: auto;
        padding: 0; gap: 0; border-right: none;
        border-bottom: 1px solid var(--dingdong-border); white-space: nowrap;
    }
    .dd-sidebar-nav {
        position: static; max-height: none; overflow-y: visible;
        display: flex; padding: 8px 12px; gap: 2px;
    }
    .dd-sidebar-item { padding: 8px 12px; border-left: none; border-bottom: 2px solid transparent; flex-shrink: 0; }
    .dd-sidebar-item.active { border-left-color: transparent; border-bottom-color: var(--dingdong-primary); }
    .dd-sidebar-label { display: none; }
    .dd-sidebar-sep { display: none; }
    .dd-main { padding: 16px; }
    .dd-course-grid { grid-template-columns: 1fr; }
}

/* ===================================================================
   v5 — 레슨 페이지 사이드바 레이아웃
   =================================================================== */

.dd-lesson-wrap {
    display: grid; grid-template-columns: 260px 1fr;
    max-width: 1200px; margin: 20px auto;
    font-family: var(--dingdong-font-ko);
    border-radius: 20px;
    /* overflow:hidden 제거 — sticky 자식이 있으면 부모 overflow:hidden이 sticky를 깨뜨림 */
    border: 1px solid var(--dingdong-border);
    box-shadow: var(--dingdong-shadow-lg);
}
.dd-lesson-wrap > .dd-lesson-sidebar { border-radius: 20px 0 0 20px; }
.dd-lesson-wrap > .dd-lesson-main   { border-radius: 0 20px 20px 0; overflow: hidden; }

/* 좌측 사이드바 */
.dd-lesson-sidebar {
    background: linear-gradient(180deg, #FAFBFC 0%, #F3F4F6 100%);
    border-right: 1px solid var(--dingdong-border);
    position: sticky; top: 0; height: 100vh;
    overflow: hidden; display: flex; flex-direction: column;
}
.dd-lesson-sidebar-header {
    padding: 16px 18px; border-bottom: 1px solid var(--dingdong-border);
    flex-shrink: 0;
}
.dd-sidebar-course-link {
    font-size: 13px; color: var(--dingdong-primary); text-decoration: none;
    font-weight: 500; display: inline-flex; align-items: center; gap: 4px;
}
.dd-sidebar-course-link:hover { text-decoration: underline; }

.dd-lesson-toc { flex: 1; overflow-y: auto; padding: 8px 0; min-height: 120px; }
.dd-toc-item {
    display: flex; align-items: center; gap: 8px; padding: 9px 18px;
    text-decoration: none; color: var(--dingdong-text); font-size: 13px;
    border-left: 3px solid transparent; transition: all 0.15s;
}
.dd-toc-item:hover { background: rgba(184,59,59,0.04); }
.dd-toc-item.active {
    background: rgba(184,59,59,0.06); color: var(--dingdong-primary);
    font-weight: 600; border-left-color: var(--dingdong-primary);
}
.dd-toc-item.completed { color: var(--dingdong-success); }
.dd-toc-icon { width: 18px; text-align: center; flex-shrink: 0; }
.dd-toc-text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.dd-lesson-sidebar-progress {
    padding: 14px 18px; border-top: 1px solid var(--dingdong-border);
    flex-shrink: 0;
}
.dd-sidebar-progress-label { font-size: 12px; color: var(--dingdong-text-light); margin-bottom: 6px; }

/* 메인 콘텐츠 */
.dd-lesson-main { padding: 28px 24px; min-width: 0; }
.dd-lesson { max-width: 780px; margin: 0 auto; font-size: 16px; line-height: 1.75; }

/* 모바일 헤더 (데스크톱에서 숨김) */
.dd-lesson-mobile-header { display: none; }

/* 레슨 헤더 */
.dd-hdr {
    margin-bottom: 24px; padding: 28px 32px;
    background: linear-gradient(135deg, rgba(26,32,44,0.04), rgba(201,168,76,0.08));
    border: 1px solid rgba(232,229,223,0.5);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
}
.dd-hdr::before {
    content: '';
    position: absolute;
    top: -40px; right: -30px;
    width: 180px; height: 180px;
    background: radial-gradient(circle, rgba(184,59,59,0.06) 0%, transparent 70%);
    pointer-events: none;
}
.dd-hdr::after {
    content: '';
    position: absolute;
    bottom: -30px; left: -20px;
    width: 120px; height: 120px;
    background: radial-gradient(circle, rgba(201,168,76,0.08) 0%, transparent 70%);
    pointer-events: none;
}
.dd-hdr-course {
    display: inline-block; font-size: 13px; color: var(--dingdong-primary) !important;
    text-decoration: none !important; margin-bottom: 10px; font-weight: 600;
    padding: 3px 10px; background: rgba(184,59,59,0.05); border-radius: 6px;
}
.dd-hdr-course:hover { background: rgba(184,59,59,0.1); }
.dd-back { font-size: 14px; color: var(--dingdong-primary); text-decoration: none; }
.dd-back:hover { text-decoration: underline; }
.dd-meta { display: flex; gap: 6px; margin: 0 0 12px; flex-wrap: wrap; }
.dd-meta .dd-badge {
    background: var(--dingdong-secondary) !important; color: #fff !important;
    padding: 3px 10px; border-radius: 8px; font-size: 12px; font-weight: 600;
}
.dd-hdr h1 { margin: 0 0 8px; font-size: 24px; line-height: 1.4; font-weight: 800; color: var(--dingdong-secondary); }
.dd-culture-tag {
    color: var(--dingdong-text-light); font-size: 13px; margin-top: 4px;
    padding: 4px 12px; background: rgba(184,59,59,0.05); border-radius: 8px;
    display: inline-block;
}
.dd-body { line-height: 1.9; font-size: 16px; }
.dd-gen-box { text-align: center; padding: 32px 20px; border: 2px dashed var(--dingdong-border); border-radius: 12px; margin-top: 16px; }
.dd-hint { font-size: 13px; color: var(--dingdong-text-light); margin-bottom: 12px; }

/* 어휘 */
.dd-vocab-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; }
.dd-vocab-card { background: #F7FAFC; border: 1px solid var(--dingdong-border); border-radius: 10px; padding: 14px; cursor: pointer; transition: all .2s; overflow: hidden; }
.dd-vocab-card:hover { border-color: var(--dingdong-primary); box-shadow: 0 2px 8px rgba(255,107,53,.1); }
.dd-vocab-front { text-align: center; position: relative; }
.dd-vocab-word { display: block; font-size: 22px; font-weight: 700; margin-bottom: 2px; }
.dd-vocab-py { display: block; font-size: 13px; color: var(--dingdong-primary); }
.dd-vocab-ko { display: block; font-size: 13px; margin-top: 4px; color: var(--dingdong-text-light); }
.dd-vocab-arrow { position: absolute; right: 0; top: 0; font-size: 10px; color: var(--dingdong-text-light); transition: transform .2s; }
.dd-vocab-card.expanded .dd-vocab-arrow { transform: rotate(180deg); }
.dd-vocab-detail { max-height: 0; overflow: hidden; transition: max-height .3s ease, padding .3s; padding: 0; }
.dd-vocab-card.expanded .dd-vocab-detail { max-height: 300px; padding: 12px 0 0; }
.dd-vocab-card.expanded { background: #FFFAF5; border-color: var(--dingdong-primary); }
.dd-vocab-pos { font-size: 11px; color: #fff; background: var(--dingdong-secondary); display: inline-block; padding: 2px 8px; border-radius: 10px; margin-bottom: 8px; }
.dd-vocab-exbox { background: #fff; border: 1px solid var(--dingdong-border); border-radius: 8px; padding: 10px; text-align: left; }
.dd-vocab-exlabel { font-size: 11px; font-weight: 600; color: var(--dingdong-primary); display: block; margin-bottom: 4px; }
.dd-vocab-ex { font-size: 14px; line-height: 1.5; }
.dd-vocab-exko { font-size: 12px; color: var(--dingdong-text-light); margin-top: 4px; }

/* 문법 */
.dd-grammar-item { padding: 16px 0; border-bottom: 1px solid var(--dingdong-border); }
.dd-grammar-item:last-child { border-bottom: none; }
.dd-grammar-head { display: flex; justify-content: space-between; align-items: center; }
.dd-grammar-head h4 { font-size: 17px; margin: 0; color: var(--dingdong-secondary); }
.dd-grammar-toggle { background: none; border: 1px solid var(--dingdong-border); border-radius: 6px; padding: 4px 12px; font-size: 13px; cursor: pointer; color: var(--dingdong-primary); }
.dd-grammar-toggle:hover { background: rgba(255,107,53,.05); }
.dd-grammar-detail { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.dd-grammar-detail.open { max-height: 800px; }
.dd-grammar-ko { background: #F0F7FF; padding: 10px 14px; border-radius: 8px; margin: 8px 0; font-size: 14px; border-left: 3px solid var(--dingdong-secondary); }
.dd-grammar-examples { background: #F7FAFC; padding: 10px 14px; border-radius: 8px; margin: 8px 0; }
.dd-grammar-ex { padding: 4px 0; border-bottom: 1px dotted var(--dingdong-border); }
.dd-grammar-ex:last-child { border-bottom: none; }
.dd-grammar-warn { background: #FFFFF0; border-left: 3px solid var(--dingdong-warning); padding: 8px 12px; border-radius: 4px; margin-top: 8px; font-size: 14px; }

/* 학습 완료 섹션 */
.dd-complete-section {
    text-align: center; padding: 28px;
    background: var(--dingdong-glass); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(45,139,85,0.15); border-radius: 16px;
    margin-bottom: 16px;
    position: relative;
    overflow: hidden;
}
.dd-complete-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, #2D8B55, #38A169, #48BB78);
}
.dd-complete-btn {
    width: 100%; max-width: 400px; padding: 16px 28px;
    background: linear-gradient(135deg, #2D8B55, #38A169) !important;
    color: #fff !important; border: none; border-radius: 14px;
    font-size: 16px; font-weight: 700; cursor: pointer;
    box-shadow: 0 4px 14px rgba(45,139,85,0.25);
    transition: all var(--dingdong-transition-spring);
    position: relative;
    overflow: hidden;
}
.dd-complete-btn::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 0; height: 0;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}
.dd-complete-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(45,139,85,0.35); }
.dd-complete-btn:hover::after { width: 300px; height: 300px; }
.dd-complete-btn:active { transform: translateY(0); }

/* 퀴즈 */
.dd-quiz-q { padding: 14px 0; border-bottom: 1px solid var(--dingdong-border); }
.dd-quiz-qt { font-size: 15px; margin-bottom: 8px; }
.dd-quiz-opt { display: block; padding: 10px 14px; margin: 4px 0; border: 1px solid var(--dingdong-border); border-radius: 8px; cursor: pointer; transition: all .2s; font-size: 14px; }
.dd-quiz-opt:hover { border-color: var(--dingdong-primary); }
.dd-quiz-opt.selected { background: rgba(255,107,53,.1); border-color: var(--dingdong-primary); font-weight: 600; }
.dd-result-pass, .dd-result-fail { text-align: center; padding: 20px; border-radius: 12px; margin-bottom: 16px; }
.dd-result-pass { background: #F0FFF4; color: var(--dingdong-success); }
.dd-result-fail { background: #FFF5F5; color: var(--dingdong-error); }
.dd-result-num { font-size: 48px; font-weight: 800; }
.dd-rev { padding: 10px 0; border-bottom: 1px solid var(--dingdong-border); font-size: 14px; }
.dd-rev-ng { background: #FFF5F5; padding: 10px 12px; border-radius: 8px; margin: 4px 0; }
.dd-rev-detail { margin-top: 6px; padding: 8px 12px 8px 16px; border-left: 3px solid var(--dingdong-error); background: rgba(255,245,245,0.5); border-radius: 0 6px 6px 0; }
.dd-rev-ok .dd-rev-detail { border-left-color: var(--dingdong-success); background: rgba(240,255,244,0.5); }
.dd-quiz-add-vocab { font-size: 12px !important; padding: 4px 10px !important; }

/* 네비게이션 */
.dd-nav { display: flex; justify-content: space-between; margin: 24px 0; gap: 12px; }
.dd-nav-btn {
    padding: 14px 20px; border: 1px solid var(--dingdong-border); border-radius: 14px;
    text-decoration: none !important; color: var(--dingdong-text) !important; font-size: 14px;
    max-width: 48%; transition: all var(--dingdong-transition);
    background: var(--dingdong-glass); backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: var(--dingdong-shadow);
}
.dd-nav-btn:hover {
    border-color: var(--dingdong-primary); color: var(--dingdong-primary) !important;
    transform: translateY(-2px); box-shadow: var(--dingdong-shadow-md);
}

/* AI 도구 탭 */
.dd-tools { margin-top: 24px; }
.dd-tabs { display: flex; gap: 0; border-bottom: 2px solid var(--dingdong-border); margin-bottom: 16px; flex-wrap: wrap; }
.dd-tab { padding: 10px 14px; border: none; background: none; font-size: 14px; font-weight: 500; cursor: pointer; color: var(--dingdong-text-light); border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all .2s; }
.dd-tab.active { color: var(--dingdong-primary); border-bottom-color: var(--dingdong-primary); }
.dd-tab:hover { color: var(--dingdong-primary); }
.dd-pane { display: none; }
.dd-pane.active { display: block; }

/* 공통 */
.dd-loading { text-align: center; padding: 20px; color: var(--dingdong-text-light); }
.dd-error { color: var(--dingdong-error); padding: 12px; }
.dd-subtitle { color: var(--dingdong-text-light); font-style: italic; margin: 0 0 12px; }
.dd-hl { background: #FFF3E0; padding: 1px 5px; border-radius: 3px; font-weight: 600; }

/* 첨삭 결과 — 글래스모피즘 풀 리포트 (v6.8.3) */
.dd-fb-report {
    margin-top: 20px;
    background: rgba(255,255,255,0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(232,229,223,0.6);
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 8px 32px rgba(44,48,57,0.08), inset 0 1px 0 rgba(255,255,255,0.6);
}
.dd-fb-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(232,229,223,0.5);
}
.dd-fb-score-ring {
    width: 80px; height: 80px; border-radius: 50%; flex-shrink: 0;
    background: conic-gradient(var(--score-color) 0deg, var(--score-color) var(--score-pct), rgba(232,229,223,0.4) var(--score-pct));
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}
.dd-fb-score-inner {
    width: 62px; height: 62px; border-radius: 50%;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(8px);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.dd-fb-score-num { font-size: 1.5rem; font-weight: 800; line-height: 1; color: var(--dingdong-text); }
.dd-fb-score-label { font-size: 0.7rem; color: var(--dingdong-text-light); margin-top: 1px; }
.dd-fb-header-text { flex: 1; }
.dd-fb-saved-inline {
    background: rgba(45,139,85,0.08); color: #2D8B55; padding: 8px 14px;
    border-radius: 10px; font-size: 0.82rem; margin-bottom: 20px;
    border: 1px solid rgba(45,139,85,0.15);
}
.dd-fb-section { margin-bottom: 20px; }
.dd-fb-section-title {
    font-size: 0.95rem; font-weight: 700; margin: 0 0 12px;
    display: flex; align-items: center; gap: 8px;
}
.dd-fb-count {
    font-size: 0.78rem; font-weight: 600; color: #fff; background: var(--dingdong-primary);
    padding: 1px 8px; border-radius: 10px;
}
.dd-fb-corr-card {
    background: rgba(255,255,255,0.6);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(232,229,223,0.5);
    border-radius: 12px; padding: 14px 16px; margin-bottom: 10px;
    transition: transform 0.15s, box-shadow 0.15s;
}
.dd-fb-corr-card:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.dd-fb-corr-high { border-left: 3px solid #DC2626; }
.dd-fb-corr-medium { border-left: 3px solid #D97706; }
.dd-fb-corr-low { border-left: 3px solid #16A34A; }
.dd-fb-corr-badges { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
.dd-fb-badge {
    display: inline-block; padding: 2px 9px; border-radius: 6px;
    color: #fff !important; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.02em;
}
.dd-fb-badge-sev {
    display: inline-block; padding: 2px 8px; border-radius: 6px;
    font-size: 0.72rem; font-weight: 600; border: 1px solid;
}
.dd-fb-sev-high { color: #DC2626 !important; border-color: #DC2626; background: rgba(220,38,38,0.06); }
.dd-fb-sev-medium { color: #D97706 !important; border-color: #D97706; background: rgba(217,119,6,0.06); }
.dd-fb-sev-low { color: #16A34A !important; border-color: #16A34A; background: rgba(22,163,74,0.06); }
.dd-fb-corr-diff { font-size: 0.95rem; line-height: 1.6; }
.dd-fb-corr-diff del { color: #DC2626; text-decoration: line-through; }
.dd-fb-corr-diff strong { color: #16A34A; }
.dd-fb-arrow { margin: 0 6px; color: var(--dingdong-text-light); font-size: 0.85rem; }
.dd-fb-corr-exp { font-size: 0.84rem; margin-top: 6px; color: var(--dingdong-text-light); line-height: 1.5; }
.dd-fb-vocab-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px;
}
.dd-fb-vocab-card {
    background: rgba(255,255,255,0.6); backdrop-filter: blur(8px);
    border: 1px solid rgba(232,229,223,0.5); border-radius: 12px;
    padding: 14px; text-align: center;
    transition: transform 0.15s;
}
.dd-fb-vocab-card:hover { transform: translateY(-2px); }
.dd-fb-vocab-from { font-size: 0.95rem; color: var(--dingdong-text-light); text-decoration: line-through; }
.dd-fb-vocab-arrow { color: var(--dingdong-accent); font-size: 0.8rem; margin: 4px 0; }
.dd-fb-vocab-to { font-size: 1.05rem; font-weight: 700; color: #2563EB; }
.dd-fb-vocab-ctx { font-size: 0.78rem; color: var(--dingdong-text-light); margin-top: 6px; }
.dd-fb-vocab-pinyin { font-size: 0.8rem; color: #8B5CF6; margin-top: 2px; }
.dd-fb-vocab-ko { font-size: 0.85rem; color: var(--dingdong-text); font-weight: 600; margin-top: 2px; }
.dd-fb-vocab-add-btn {
    margin-top: 8px; padding: 5px 12px; border: 1px solid rgba(99,102,241,0.3);
    border-radius: 8px; background: rgba(99,102,241,0.06); color: #6366F1 !important;
    font-size: 0.78rem; font-weight: 600; cursor: pointer; transition: all 0.15s;
    width: 100%; display: block;
}
.dd-fb-vocab-add-btn:hover:not(:disabled) { background: rgba(99,102,241,0.14); }
.dd-fb-vocab-added { background: rgba(45,139,85,0.08) !important; color: #2D8B55 !important; border-color: rgba(45,139,85,0.3) !important; cursor: default; }
.dd-fb-positive {
    background: rgba(45,139,85,0.04); border: 1px solid rgba(45,139,85,0.12);
    border-radius: 12px; padding: 16px;
}
.dd-fb-pos-list, .dd-fb-style-list { margin: 0; padding-left: 20px; font-size: 0.9rem; line-height: 1.7; }
.dd-fb-pos-list li::marker { content: '✓ '; color: #2D8B55; }
.dd-fb-style-list li::marker { content: '💡 '; }
.dd-fb-grammar-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.dd-fb-grammar-tag {
    background: rgba(99,102,241,0.08); color: #6366F1 !important;
    padding: 4px 12px; border-radius: 8px; font-size: 0.85rem; font-weight: 600;
    border: 1px solid rgba(99,102,241,0.15);
}
@media (max-width: 768px) {
    .dd-fb-header { flex-direction: column; text-align: center; gap: 12px; }
    .dd-fb-vocab-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
    .dd-fb-report { padding: 18px; }
}

/* ── AI 학습 도구 글래스모피즘 (v6.8.3) ── */
.dd-main .dingdong-card {
    background: rgba(255,255,255,0.65);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(232,229,223,0.45);
    border-radius: 14px;
    box-shadow: 0 4px 24px rgba(44,48,57,0.06), inset 0 1px 0 rgba(255,255,255,0.5);
}
.dd-main .dingdong-card:hover {
    box-shadow: 0 8px 32px rgba(44,48,57,0.1), inset 0 1px 0 rgba(255,255,255,0.5);
}
.dd-main .dingdong-card h3 {
    font-weight: 700 !important; color: var(--dingdong-text) !important;
}
.dd-main .dingdong-input {
    background: rgba(255,255,255,0.7) !important;
    border: 1px solid rgba(232,229,223,0.5) !important;
    border-radius: 10px !important;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.dd-main .dingdong-input:focus {
    border-color: var(--dingdong-primary) !important;
    box-shadow: 0 0 0 3px rgba(184,59,59,0.08) !important;
    outline: none;
}
.dd-main .dingdong-btn-primary {
    background: linear-gradient(135deg, #B83B3B, #D44E4E) !important;
    border: none !important;
    border-radius: 12px !important;
    box-shadow: 0 4px 14px rgba(184,59,59,0.25);
    font-weight: 700 !important;
    transition: transform 0.15s, box-shadow 0.15s;
}
.dd-main .dingdong-btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(184,59,59,0.35);
}
.dd-at-topic-btn {
    background: rgba(255,255,255,0.6) !important;
    backdrop-filter: blur(8px) !important;
    border: 1px solid rgba(232,229,223,0.5) !important;
    border-radius: 10px !important;
    transition: all 0.15s !important;
}
.dd-at-topic-btn:hover {
    background: rgba(184,59,59,0.06) !important;
    border-color: var(--dingdong-primary) !important;
}

/* AI 글쓰기 */
.dd-article { margin-top: 16px; }
.dd-article-body { line-height: 1.8; font-size: 16px; padding: 16px; background: #FAFAFA; border-radius: 8px; margin: 12px 0; }
.dd-box { border-radius: 8px; padding: 12px 16px; margin: 12px 0; }
.dd-box-yellow { background: #FFF8E1; }
.dd-box-orange { background: #FFF3E0; }
.dd-vocab-card-sm { background: #F7FAFC; border: 1px solid var(--dingdong-border); border-radius: 8px; padding: 10px; text-align: center; }

/* 영상 */
.dd-vid-list {}
.dd-vid-item { padding: 14px 0; border-bottom: 1px solid var(--dingdong-border); }
.dd-vid-item:last-child { border-bottom: none; }
.dd-vid-info strong { font-size: 15px; }
.dd-vid-why { font-size: 13px; color: var(--dingdong-text-light); }
.dd-vid-links { margin-top: 8px; display: flex; gap: 8px; }
.dd-vid-text { line-height: 1.6; }

/* 롤플레잉 */
.dd-rp-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; margin: 8px 0; }
.dd-rp-card { background: var(--dingdong-card-bg); border: 1px solid var(--dingdong-border); border-radius: 10px; padding: 14px; text-align: center; cursor: pointer; transition: all .2s; }
.dd-rp-card:hover { border-color: var(--dingdong-primary); box-shadow: 0 2px 8px rgba(255,107,53,.12); }
.dd-rp-card small { display: block; font-size: 12px; color: var(--dingdong-text-light); margin-top: 4px; }
.dd-rp-info { padding: 8px 12px; background: #F0F7FF; border-radius: 8px; margin-bottom: 12px; font-size: 14px; }
.dd-rp-msgs { max-height: 400px; overflow-y: auto; margin-bottom: 12px; display: flex; flex-direction: column; gap: 10px; }
.dd-rp-tip { font-size: 13px; color: #B7791F; background: #FFFFF0; padding: 6px 10px; border-radius: 6px; margin-top: 4px; }
.dd-rp-corr { font-size: 13px; color: var(--dingdong-error); background: #FFF5F5; padding: 6px 10px; border-radius: 6px; margin-top: 4px; }
.dd-rp-sugg { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.dd-rp-scores { display: flex; gap: 16px; margin: 12px 0; }
.dd-rp-fb h4 { margin-top: 16px; }

/* 모바일 레슨 레이아웃 */
@media (max-width: 768px) {
    .dd-lesson-wrap { grid-template-columns: 1fr; }
    .dd-lesson-sidebar { display: none; }
    .dd-lesson-mobile-header {
        display: flex; justify-content: space-between; align-items: center;
        margin-bottom: 12px; font-size: 14px;
    }
    .dd-mobile-progress {
        background: var(--dingdong-primary); color: #fff;
        padding: 2px 10px; border-radius: 10px; font-size: 13px; font-weight: 600;
    }
}

/* ===================================================================
   v5.1 — 어휘 테이블 레이아웃 (카드형 → 행형)
   =================================================================== */

.dd-count-badge {
    font-size: 13px; font-weight: 400; color: #fff;
    background: var(--dingdong-primary); padding: 2px 10px;
    border-radius: 10px; margin-left: 6px; vertical-align: middle;
}

.dd-vocab-table { margin-top: 12px; }
.dd-vocab-row {
    padding: 14px 16px; border-bottom: 1px solid var(--dingdong-border);
    transition: all var(--dingdong-transition);
    border-radius: 8px;
    margin: 2px 0;
}
.dd-vocab-row:last-child { border-bottom: none; }
.dd-vocab-row:hover { background: linear-gradient(135deg, #FFFAF5, #FFF8F0); border-color: rgba(184,59,59,0.15); box-shadow: 0 2px 8px rgba(184,59,59,0.06); }

.dd-vocab-row-main {
    display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
}
.dd-vocab-row-main .dd-vocab-word {
    font-size: 20px; font-weight: 700; display: inline;
}
.dd-vocab-row-main .dd-vocab-py {
    font-size: 13px; color: var(--dingdong-primary); display: inline;
}
.dd-vocab-row-main .dd-vocab-pos {
    font-size: 11px; color: #fff; background: var(--dingdong-secondary);
    padding: 1px 8px; border-radius: 10px; display: inline-block;
}
.dd-vocab-row-main .dd-vocab-meaning {
    font-size: 14px; color: var(--dingdong-text); margin-left: auto;
}

.dd-vocab-row-example {
    margin-top: 6px; padding-left: 4px; font-size: 14px; line-height: 1.6;
    color: var(--dingdong-text);
}
.dd-vocab-ex-label {
    display: inline-block; font-size: 11px; font-weight: 600;
    color: var(--dingdong-primary); margin-right: 6px;
    background: rgba(255,107,53,0.08); padding: 1px 6px; border-radius: 4px;
}

@media (max-width: 768px) {
    .dd-vocab-row-main { flex-direction: column; gap: 2px; }
    .dd-vocab-row-main .dd-vocab-meaning { margin-left: 0; }
}

/* ===================================================================
   v5.1 — 교육 영상 임베드
   =================================================================== */

.dd-embed-list { display: flex; flex-direction: column; gap: 20px; }
.dd-embed-item {}
.dd-embed-player { margin-bottom: 8px; }
.dd-embed-item h4 { margin: 0 0 4px; font-size: 16px; }
.dd-embed-desc { font-size: 14px; color: var(--dingdong-text-light); margin: 0; }

/* ===================================================================
   v5.1 — AI 교육 슬라이드
   =================================================================== */

/* 섹션 헤더 (제목 + 액션 버튼) */
.dd-section-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 16px;
}
.dd-section-header h2 { margin: 0; }
.dd-section-actions { display: flex; gap: 6px; }

.dd-slide-viewer {
    background: linear-gradient(135deg, #F0F4F8 0%, #E2E8F0 100%);
    border-radius: var(--dingdong-radius); overflow: hidden;
    color: #2C3E50 !important; padding: 32px 28px 20px;
    min-height: 260px; display: flex; flex-direction: column;
    border: 1px solid #CBD5E0;
}
.dd-slide-content { flex: 1; }
.dd-slide-content h3,
.dd-slide-content h3.dingdong-zh { font-size: 22px; margin: 0 0 4px; color: #1A202C !important; opacity: 1 !important; }
.dd-slide-subtitle { font-size: 14px; color: #718096 !important; margin: 0 0 16px; font-style: italic; }
.dd-slide-body,
.dd-slide-body.dingdong-zh,
.dd-slide-viewer .dingdong-zh { font-size: 16px; line-height: 1.8; color: #2D3748 !important; opacity: 1 !important; }
.dd-slide-ko {
    background: rgba(255,255,255,0.7); border-radius: 8px;
    padding: 10px 14px; margin-top: 12px; font-size: 14px; line-height: 1.6;
    color: #4A5568 !important;
}
.dd-slide-keypoint {
    background: rgba(201,168,76,0.15); border-radius: 6px;
    padding: 8px 12px; margin-top: 12px; font-size: 14px; font-weight: 500;
    color: #92400E !important;
}
.dd-slide-img-desc {
    font-size: 12px; color: #A0AEC0 !important; margin-top: 12px; font-style: italic;
}
.dd-slide-items {
    list-style: none; padding: 0; margin: 10px 0 0;
}
.dd-slide-items li {
    padding: 6px 0 6px 18px; position: relative;
    font-size: 15px; line-height: 1.7; color: #2D3748;
    border-bottom: 1px solid rgba(0,0,0,0.04);
}
.dd-slide-items li:last-child { border-bottom: none; }
.dd-slide-items li::before {
    content: '•'; position: absolute; left: 2px;
    color: var(--dingdong-primary); font-weight: 700;
}

.dd-slide-nav {
    display: flex; justify-content: space-between; align-items: center;
    margin-top: 16px; padding-top: 12px; border-top: 1px solid #CBD5E0;
}
.dd-slide-nav .dingdong-btn-outline {
    color: #2C3E50; border-color: #A0AEC0;
}
.dd-slide-nav .dingdong-btn-outline:hover {
    background: rgba(0,0,0,0.05); border-color: #2C3E50;
}
.dd-slide-nav .dingdong-btn-outline:disabled {
    opacity: 0.3; cursor: not-allowed;
}
#dd-slide-counter { font-size: 14px; color: #718096; }

/* ===================================================================
   v5.1 — 교수자 전용 도구
   =================================================================== */

.dd-instructor-tool {
    border: 1px dashed var(--dingdong-border); background: #FAFAFA;
}
.dd-instructor-tool summary {
    cursor: pointer; font-weight: 600; font-size: 14px; color: var(--dingdong-secondary);
}
.dd-instructor-tool summary:hover { color: var(--dingdong-primary); }

/* ===================================================================
   v5.2 — 자료실
   =================================================================== */

.dd-resource-grid { display: flex; flex-direction: column; gap: 8px; }
.dd-resource-item {
    display: flex; align-items: center; gap: 14px; padding: 14px 16px;
    background: var(--dingdong-card-bg); border: 1px solid var(--dingdong-border);
    border-radius: var(--dingdong-radius); transition: border-color 0.15s;
}
.dd-resource-item:hover { border-color: var(--dingdong-primary); }
.dd-resource-icon { font-size: 28px; width: 40px; text-align: center; flex-shrink: 0; }
.dd-resource-info { flex: 1; min-width: 0; }
.dd-resource-info h4 { margin: 0 0 2px; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dd-resource-desc { font-size: 13px; color: var(--dingdong-text-light); margin: 0 0 4px; }
.dd-resource-meta { display: flex; gap: 10px; font-size: 12px; color: var(--dingdong-text-light); }
.dd-resource-cat {
    background: var(--dingdong-accent-light); color: var(--dingdong-accent);
    padding: 1px 8px; border-radius: 8px; font-size: 11px;
}

@media (max-width: 768px) {
    .dd-resource-item { flex-wrap: wrap; }
    .dd-resource-info { width: 100%; }
}


/* ===================================================================
   v5.3 — 퀵 링크, 코스 목록 숏코드, 필터 칩
   =================================================================== */

/* 대시보드 퀵 링크 */
.dd-quick-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; margin-top: 20px; }
.dd-quick-link {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 20px 12px; background: var(--dingdong-card-bg);
    border: 1px solid var(--dingdong-border); border-radius: var(--dingdong-radius);
    text-decoration: none; color: var(--dingdong-text); font-size: 14px; font-weight: 500;
    transition: all 0.15s;
}
.dd-quick-link:hover { border-color: var(--dingdong-primary); color: var(--dingdong-primary); transform: translateY(-1px); }
.dd-quick-icon { font-size: 28px; }

/* 코스 목록 숏코드 */
.dd-courses-page { max-width: 1080px; margin: 0 auto; padding: 20px 16px; font-family: var(--dingdong-font-ko); }
.dd-courses-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.dd-courses-header h2 { margin: 0; font-size: 24px; }

/* 필터 칩 */
.dd-courses-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.dd-filter-chip {
    display: inline-block; padding: 6px 16px; border: 1px solid var(--dingdong-border);
    border-radius: 20px; font-size: 13px; text-decoration: none;
    color: var(--dingdong-text-light); transition: all 0.15s;
}
.dd-filter-chip:hover { border-color: var(--dingdong-primary); color: var(--dingdong-primary); }
.dd-filter-chip.active {
    background: var(--dingdong-primary); color: #fff;
    border-color: var(--dingdong-primary);
}

/* 코스 카드 그리드 */
.dd-courses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.dd-course-card-item {
    background: var(--dingdong-card-bg); border: 1px solid var(--dingdong-border);
    border-radius: var(--dingdong-radius); overflow: hidden;
    text-decoration: none; color: var(--dingdong-text);
    transition: transform 0.15s, box-shadow 0.15s;
}
.dd-course-card-item:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.dd-course-card-thumb { height: 150px; overflow: hidden; background: var(--dingdong-accent-light); display: flex; align-items: center; justify-content: center; }
.dd-course-card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.dd-course-card-thumb-empty { font-size: 48px; }
.dd-course-card-info { padding: 14px; }
.dd-course-card-badges { display: flex; gap: 6px; margin-bottom: 6px; }
.dd-course-card-info h3 { font-size: 16px; margin: 0 0 4px; line-height: 1.3; }
.dd-course-card-subtitle { font-size: 13px; color: var(--dingdong-text-light); margin: 0 0 8px; }
.dd-course-card-stats { display: flex; gap: 12px; font-size: 13px; color: var(--dingdong-text-light); }

.dd-courses-pagination { text-align: center; margin-top: 24px; }
.dd-courses-pagination .page-numbers { display: inline-block; padding: 6px 12px; margin: 0 2px; border: 1px solid var(--dingdong-border); border-radius: 6px; text-decoration: none; color: var(--dingdong-text); font-size: 14px; }
.dd-courses-pagination .page-numbers.current { background: var(--dingdong-primary); color: #fff; border-color: var(--dingdong-primary); }

.dd-courses-cta { text-align: center; margin-top: 24px; padding: 20px; background: var(--dingdong-accent-light); border-radius: var(--dingdong-radius); }
.dd-courses-cta p { margin: 0 0 12px; color: var(--dingdong-text-light); }

@media (max-width: 768px) {
    .dd-courses-grid { grid-template-columns: 1fr; }
    .dd-quick-links { grid-template-columns: repeat(2, 1fr); }
}

/* ===================================================================
   v5.3.3 — 사이드바 학습도구 고정 메뉴
   =================================================================== */

/* 사이드바 하단 wrapper — TOC 공간 확보 */
.dd-sidebar-bottom {
    flex-shrink: 1; overflow-y: auto; border-top: 1px solid var(--dingdong-border);
    max-height: 50vh;
}
.dd-sidebar-bottom::-webkit-scrollbar { width: 4px; }
.dd-sidebar-bottom::-webkit-scrollbar-thumb { background: var(--dingdong-border); border-radius: 2px; }

.dd-sidebar-tools {
    padding: 14px 0;
    flex-shrink: 1;
}
.dd-sidebar-tools-label {
    font-size: 11px; font-weight: 700; text-transform: uppercase;
    color: var(--dingdong-text-light); padding: 0 18px 10px;
    letter-spacing: 0.8px;
}
.dd-sidebar-tool-item {
    display: flex; align-items: center; gap: 8px; padding: 8px 18px;
    font-size: 13px; text-decoration: none; color: var(--dingdong-text);
    transition: all 0.15s; border-left: 2px solid transparent;
    font-weight: 400;
}
.dd-sidebar-tool-item:hover {
    color: var(--dingdong-primary); background: rgba(184,59,59,0.04);
    border-left-color: var(--dingdong-primary);
}
.dd-sidebar-tool-complete {
    color: var(--dingdong-success); font-weight: 500;
}
.dd-sidebar-tool-complete:hover {
    color: var(--dingdong-success); background: rgba(45,139,85,0.04);
    border-left-color: var(--dingdong-success);
}
.dd-sidebar-badge {
    font-size: 11px; background: var(--dingdong-border);
    padding: 1px 6px; border-radius: 8px; margin-left: auto;
}

/* ===== Phase 5-B: Dashboard History Tabs ===== */

/* Stats row */
.dd-stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}
.dd-stat-card {
    background: #fff;
    border: 1px solid var(--dingdong-border);
    border-radius: 16px;
    padding: 20px 16px;
    text-align: center;
    transition: all 0.25s;
    position: relative;
    overflow: hidden;
}
.dd-stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, #DBCDF0, #C6DEF1, #C9E4DE);
    opacity: 0;
    transition: opacity 0.25s;
}
.dd-stat-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,0,0,0.06); }
.dd-stat-card:hover::before { opacity: 1; }
.dd-stat-num {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--dingdong-primary, #C75B7A), #D4A84B);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}
.dd-stat-label {
    font-size: 13px;
    color: var(--dingdong-text-light, #718096);
    margin-top: 6px;
    font-weight: 500;
}

/* History list — 카드형 업그레이드 */
.dd-history-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}
.dd-history-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    background: #fff;
    border: 1px solid var(--dingdong-border);
    border-radius: 14px;
    transition: all 0.2s;
    border-left: 4px solid #DBCDF0;
}
.dd-history-item:nth-child(3n+1) { border-left-color: #F2C6DE; }
.dd-history-item:nth-child(3n+2) { border-left-color: #C6DEF1; }
.dd-history-item:nth-child(3n+3) { border-left-color: #C9E4DE; }
.dd-history-item:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
    transform: translateY(-2px);
    border-left-width: 5px;
}
.dd-history-score {
    min-width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    font-weight: 800;
    font-size: 18px;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}
.dd-score-high { background: linear-gradient(135deg, #48BB78, #38A169); }
.dd-score-mid { background: linear-gradient(135deg, #ECC94B, #D69E2E); }
.dd-score-low { background: linear-gradient(135deg, #FC8181, #E53E3E); }

.dd-history-info { flex: 1; min-width: 0; }
.dd-history-topic { font-weight: 600; font-size: 14px; color: var(--dingdong-text); margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dd-history-preview { font-size: 13px; color: var(--dingdong-text-light); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 2px; }
.dd-history-date { font-size: 12px; color: var(--dingdong-text-light); opacity: 0.7; }
.dd-history-meta { display: flex; gap: 10px; font-size: 12px; color: var(--dingdong-text-light); margin-top: 4px; flex-wrap: wrap; }
.dd-history-meta span { display: inline-flex; align-items: center; gap: 3px; }

.dd-history-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}
.dd-history-info { flex: 1; min-width: 0; }
.dd-history-topic {
    font-weight: 600;
    font-size: 15px;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.dd-history-subtitle {
    font-size: 13px;
    color: #718096;
    margin-top: 2px;
}
.dd-history-preview {
    font-size: 13px;
    color: #718096;
    margin-top: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.dd-history-date {
    font-size: 12px;
    color: #A0AEC0;
    margin-top: 4px;
}

/* Roleplay mini scores */
.dd-rp-mini-scores {
    font-size: 12px;
    color: var(--dingdong-primary, #E53E3E);
    font-weight: 500;
    margin-top: 4px;
}

/* Filter tabs */
.dd-filter-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}
.dd-filter-tab {
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid var(--dingdong-border, #E2E8F0);
    background: #fff;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
}
.dd-filter-tab.active {
    background: var(--dingdong-primary, #E53E3E);
    color: #fff;
    border-color: var(--dingdong-primary, #E53E3E);
}

/* Bookmark styles */
.dd-bm-btn {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    transition: transform 0.15s;
}
.dd-bm-btn:hover { transform: scale(1.2); }
.dd-wg-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.dd-bookmarked {
    background: #FFFBEB;
    border-color: #F6E05E;
}

/* Pagination */
.dd-pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 16px;
}
.dd-page-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--dingdong-border, #E2E8F0);
    background: #fff;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s;
}
.dd-page-btn.active {
    background: var(--dingdong-primary, #E53E3E);
    color: #fff;
    border-color: var(--dingdong-primary, #E53E3E);
}
.dd-page-btn:hover:not(.active) {
    border-color: var(--dingdong-primary, #E53E3E);
}

/* Modal */
.dd-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: dd-modal-fade-in 0.2s ease;
}
@keyframes dd-modal-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}
.dd-modal {
    background: var(--dingdong-card-bg);
    border-radius: 20px;
    max-width: 640px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 28px;
    position: relative;
    box-shadow: 0 24px 80px rgba(0,0,0,0.2), 0 8px 24px rgba(0,0,0,0.1);
    animation: dd-modal-slide-up 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes dd-modal-slide-up {
    from { opacity: 0; transform: translateY(20px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.dd-modal-lg { max-width: 800px; }
.dd-modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: #A0AEC0;
    z-index: 1;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.dd-modal-close:hover {
    background: #F7FAFC;
    color: #4A5568;
}

/* Detail sections */
.dd-detail-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
    color: #718096;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--dingdong-border, #E2E8F0);
}
.dd-detail-section {
    margin-bottom: 20px;
}
.dd-detail-section h4 {
    margin: 0 0 8px;
    font-size: 15px;
}
.dd-detail-writing {
    background: #F7FAFC;
    padding: 16px;
    border-radius: 10px;
    line-height: 1.8;
    border-left: 3px solid var(--dingdong-primary, #E53E3E);
}
.dd-detail-ko {
    color: #718096;
    margin-top: 8px;
}
.dd-pos-item {
    padding: 4px 0;
    color: #38A169;
}

/* Replay messages */
.dd-replay-msgs {
    max-height: 400px;
    overflow-y: auto;
    margin: 16px 0;
    padding: 12px;
    background: #F7FAFC;
    border-radius: 12px;
}
.dd-rp-fb-summary {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--dingdong-border, #E2E8F0);
}

/* Mobile fixes for history */
@media (max-width: 768px) {
    .dd-stats-row { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .dd-history-item { flex-wrap: wrap; gap: 8px; padding: 12px; }
    .dd-history-score { min-width: 40px; height: 40px; font-size: 15px; }
    .dd-modal { padding: 20px; margin: 10px; max-height: 90vh; }
    .dd-detail-meta { flex-direction: column; gap: 4px; }
    .dd-wg-actions { width: 100%; justify-content: flex-end; }
}

/* Phase 5-B: Lesson page additions */
.dd-fb-saved {
    background: #F0FFF4;
    color: #38A169;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 12px;
    border: 1px solid #C6F6D5;
}
.dd-wg-save-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--dingdong-border, #E2E8F0);
    flex-wrap: wrap;
}
.dd-wg-save-note {
    font-size: 12px;
    color: #718096;
}

/* ===== Phase 5-C: Vocabulary SRS ===== */

/* Add vocab button in lesson */
.dd-add-vocab-btn {
    background: none; border: 1px solid var(--dingdong-border, #E2E8F0);
    border-radius: 6px; padding: 2px 6px; font-size: 12px; cursor: pointer;
    margin-left: 8px; transition: all 0.15s; white-space: nowrap;
}
.dd-add-vocab-btn:hover { border-color: var(--dingdong-primary, #E53E3E); background: #FFF5F5; }
.dd-add-vocab-btn:disabled { cursor: default; opacity: 0.7; }

/* Vocab list in dashboard */
.dd-vocab-list-dash { display: flex; flex-direction: column; gap: 6px; }
.dd-vocab-dash-item {
    display: flex; align-items: center; gap: 12px; padding: 12px 14px;
    background: #fff; border: 1px solid var(--dingdong-border, #E2E8F0);
    border-radius: 10px; border-left: 3px solid #CBD5E0; position: relative;
}
.dd-srs-new { border-left-color: #FC8181; }
.dd-srs-mid { border-left-color: #F6E05E; }
.dd-srs-mastered { border-left-color: #68D391; }
.dd-vocab-dash-word { font-weight: 600; min-width: 80px; }
.dd-vocab-dash-meaning { flex: 1; color: #4A5568; font-size: 14px; }
.dd-vocab-dash-meta { font-size: 11px; color: #A0AEC0; white-space: nowrap; }
.dd-vocab-del-btn {
    background: none; border: none; color: #CBD5E0; font-size: 14px;
    cursor: pointer; padding: 4px; line-height: 1;
}
.dd-vocab-del-btn:hover { color: #E53E3E; }

/* Flashcard review */
.dd-review-progress { text-align: center; font-size: 14px; color: #718096; margin-bottom: 12px; }
.dd-flashcard {
    background: var(--dingdong-glass);
    backdrop-filter: blur(var(--dingdong-glass-blur));
    -webkit-backdrop-filter: blur(var(--dingdong-glass-blur));
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 20px; padding: 36px 28px; text-align: center;
    min-height: 280px; display: flex; flex-direction: column; justify-content: center;
    box-shadow: var(--dingdong-shadow-md), inset 0 1px 0 rgba(255,255,255,0.5);
    transition: transform var(--dingdong-transition-spring);
}
.dd-flashcard:hover { transform: scale(1.01); }
.dd-flashcard-front { margin-bottom: 16px; }
.dd-flashcard-word { font-size: 36px; font-weight: 700; margin-bottom: 8px; }
.dd-flashcard-pinyin { font-size: 18px; color: #718096; }
.dd-flashcard-back {
    border-top: 1px solid var(--dingdong-border, #E2E8F0);
    padding-top: 16px; margin-top: 8px;
}
.dd-flashcard-meaning { font-size: 22px; font-weight: 600; color: var(--dingdong-primary, #E53E3E); margin-bottom: 8px; }
.dd-flashcard-example { font-size: 15px; color: #4A5568; margin-bottom: 8px; }
.dd-flashcard-meta { font-size: 12px; color: #A0AEC0; }

.dd-review-btns { display: flex; gap: 8px; margin-top: 20px; justify-content: center; flex-wrap: wrap; }
.dd-review-btn {
    padding: 10px 16px; border-radius: 10px; border: 1px solid var(--dingdong-border, #E2E8F0);
    background: #fff; font-size: 14px; cursor: pointer; transition: all 0.15s; min-width: 80px;
}
.dd-review-btn:hover { transform: translateY(-2px); box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.dd-review-again { border-color: #FC8181; color: #E53E3E; }
.dd-review-again:hover { background: #FFF5F5; }
.dd-review-hard { border-color: #F6E05E; color: #D69E2E; }
.dd-review-hard:hover { background: #FFFFF0; }
.dd-review-good { border-color: #68D391; color: #38A169; }
.dd-review-good:hover { background: #F0FFF4; }
.dd-review-easy { border-color: #63B3ED; color: #3182CE; }
.dd-review-easy:hover { background: #EBF8FF; }

.dd-review-done { text-align: center; padding: 40px 20px; }
.dd-review-done-icon { font-size: 48px; margin-bottom: 12px; }

@media (max-width: 768px) {
    .dd-flashcard-word { font-size: 28px; }
    .dd-flashcard-meaning { font-size: 18px; }
    .dd-review-btns { gap: 6px; }
    .dd-review-btn { padding: 8px 12px; font-size: 13px; min-width: 70px; }
}

/* ===== Phase 7: Instructor Dashboard ===== */
.dd-instructor-course-list { display: flex; flex-direction: column; gap: 10px; }
.dd-instructor-course-item { padding: 16px !important; }
.dd-ic-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }
.dd-ic-header h4 { margin: 0; font-size: 16px; line-height: 1.3; }
.dd-ic-subtitle { font-size: 13px; color: var(--dingdong-text-light); margin-top: 2px; }
.dd-ic-status { font-size: 12px; white-space: nowrap; padding: 2px 8px; border-radius: 4px; background: #F7FAFC; }
.dd-ic-stats { display: flex; gap: 16px; font-size: 13px; color: var(--dingdong-text-light); margin-bottom: 10px; }
.dd-ic-actions { display: flex; gap: 6px; }

/* Analytics table */
.dd-analytics-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; margin-top: 8px; border-radius: 12px; overflow: hidden; border: 1px solid var(--dingdong-border); }
.dd-analytics-table th { text-align: left; padding: 10px 14px; background: #F0F4F8; border-bottom: 2px solid var(--dingdong-border); font-weight: 600; font-size: 13px; color: var(--dingdong-text-light); }
.dd-analytics-table td { padding: 10px 14px; border-bottom: 1px solid #F0F0F0; }
.dd-analytics-table tr:last-child td { border-bottom: none; }
.dd-analytics-table tr:hover td { background: #FAFAF8; }

@media (max-width: 768px) {
    .dd-ic-header { flex-direction: column; }
    .dd-ic-stats { flex-wrap: wrap; gap: 8px; }
    .dd-analytics-table { font-size: 12px; }
    .dd-analytics-table th, .dd-analytics-table td { padding: 6px; }
}

/* ===== Emoji Avatar System ===== */
.dd-emoji-avatar {
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%; background: rgba(255,255,255,0.15);
    line-height: 1; flex-shrink: 0;
    font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Noto Color Emoji', 'Twemoji Mozilla', sans-serif;
    color: initial !important;
    -webkit-text-fill-color: initial !important;
}
.dd-emoji-avatar-xl { width: 56px; height: 56px; font-size: 32px; }
.dd-emoji-avatar-lg { width: 48px; height: 48px; font-size: 28px; }
.dd-emoji-avatar-md { width: 36px; height: 36px; font-size: 20px; }
.dd-emoji-avatar-sm { width: 28px; height: 28px; font-size: 16px; }

/* Emoji Picker in Settings */
.dd-emoji-picker {
    display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px;
}
.dd-emoji-opt {
    width: 40px; height: 40px; font-size: 22px; border: 2px solid var(--dingdong-border);
    border-radius: 10px; background: #fff; cursor: pointer; display: flex;
    align-items: center; justify-content: center; transition: all 0.15s;
    font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Noto Color Emoji', 'Twemoji Mozilla', sans-serif;
    line-height: 1;
    color: initial !important;
    -webkit-text-fill-color: initial !important;
    text-shadow: none !important;
}
.dd-emoji-opt:hover { border-color: var(--dingdong-primary); transform: scale(1.1); }
.dd-emoji-opt.active {
    border-color: var(--dingdong-primary); background: var(--dingdong-primary-light);
    box-shadow: 0 0 0 2px rgba(184,59,59,0.2);
}

/* ===== Global UI Fixes ===== */

/* 코스 상세 링크 밑줄 제거 */
.dd-course-wrap a { text-decoration: none; }
.dd-course-wrap a:hover { text-decoration: none; color: var(--dingdong-primary); }

/* 레슨 페이지 링크 밑줄 제거 */
.dd-lesson-wrap a { text-decoration: none; }

/* 챗봇 위젯 z-index 강화 */
.dingdong-tutor-widget { z-index: 9999 !important; }
.dingdong-tutor-toggle { z-index: 9999 !important; }

/* ===== Phase 8: 문화 콘텐츠 & 영상 추천 ===== */

/* 오늘의 추천 */
.dd-recommend-header { margin-bottom: 12px; }
.dd-recommend-header h3 { font-size: 16px; margin: 0; }
.dd-recommend-cards { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.dd-recommend-card {
    display: flex; align-items: center; gap: 12px; padding: 14px 16px;
    background: linear-gradient(135deg, #FFF9F0, #FFF5F5); border: 1px solid var(--dingdong-border);
    border-radius: 12px; flex: 1; min-width: 240px; transition: box-shadow 0.2s;
}
.dd-recommend-card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.dd-recommend-icon { font-size: 28px; }
.dd-recommend-info { flex: 1; }
.dd-recommend-cat { font-size: 12px; color: #888; }
.dd-recommend-topic { font-size: 14px; font-weight: 500; color: var(--dingdong-text); margin-top: 2px; }

/* 문화 콘텐츠 생성 폼 */
.dd-culture-generate .dd-form-row { display: flex; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
@media (max-width: 768px) { .dd-culture-generate .dd-form-row { flex-direction: column; } }

/* 필터 바 */
.dd-filter-bar {
    display: flex; gap: 12px; align-items: center; margin-bottom: 16px; flex-wrap: wrap;
}
/* 필터 폼 (자료실 등) */
.dd-filter-form {
    display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap;
}
.dd-filter-group {
    display: flex; flex-direction: column; gap: 4px; min-width: 140px;
}
.dd-filter-group label {
    display: block; font-size: 13px; font-weight: 600; color: var(--dingdong-text-light, #718096);
    line-height: 1.4; margin-bottom: 2px;
}
.dd-filter-group .dingdong-input {
    height: 42px;
}
.dd-filter-select {
    min-width: 130px;
}
@media (max-width: 768px) {
    .dd-filter-form { flex-direction: column; align-items: stretch; }
    .dd-filter-group { min-width: auto; }
}
.dd-filter-check { display: flex; align-items: center; gap: 4px; font-size: 14px; cursor: pointer; }

/* 문화 콘텐츠 피드 목록 */
.dd-culture-list { display: flex; flex-direction: column; gap: 12px; }
.dd-culture-item { padding: 16px; }
.dd-culture-item-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.dd-culture-cat-badge {
    font-size: 12px; padding: 3px 10px; background: var(--dingdong-primary-light);
    color: var(--dingdong-primary); border-radius: 12px; font-weight: 500;
}
.dd-culture-date { font-size: 12px; color: #999; }
.dd-culture-item h4 { font-size: 16px; margin: 0 0 4px; }
.dd-culture-title-ko { font-size: 13px; color: #666; margin: 0 0 8px; }
.dd-culture-item-actions { display: flex; gap: 6px; margin-top: 8px; }

/* 문화 상세 모달 */
.dd-modal-lg { max-width: 720px; max-height: 85vh; overflow-y: auto; }
.dd-culture-body { font-size: 16px; line-height: 1.9; }
.dd-culture-section-kr, .dd-culture-section-cn {
    padding: 16px; border-radius: 10px; margin-bottom: 12px;
}
.dd-culture-section-kr { background: #F0F7FF; border-left: 4px solid #4A90D9; }
.dd-culture-section-cn { background: #FFF5F5; border-left: 4px solid var(--dingdong-primary); }

/* 비교 표 */
.dd-compare-table { width: 100%; border-collapse: collapse; font-size: 14px; margin-top: 8px; }
.dd-compare-table th {
    background: var(--dingdong-text); color: #fff; padding: 8px 12px;
    text-align: left; font-weight: 500;
}
.dd-compare-table td { padding: 8px 12px; border-bottom: 1px solid var(--dingdong-border); }
.dd-compare-note { font-size: 12px; color: #666; background: #FFFBEB; padding: 6px 12px !important; }

/* 인사이트 박스 */
.dd-insight {
    background: linear-gradient(135deg, #FFFBEB, #FFF9F0); padding: 16px;
    border-radius: 10px; border-left: 4px solid var(--dingdong-gold);
}

/* 어휘 미니 카드 */
.dd-vocab-cards { display: flex; flex-wrap: wrap; gap: 10px; }
.dd-vocab-mini {
    background: #F8FAFC; border: 1px solid var(--dingdong-border); padding: 10px 14px;
    border-radius: 8px; min-width: 180px; flex: 1;
}
.dd-vocab-word { font-size: 18px; font-weight: 700; color: var(--dingdong-primary); }
.dd-vocab-pinyin { font-size: 13px; color: #888; }
.dd-vocab-meaning { font-size: 13px; color: var(--dingdong-text); }
.dd-vocab-example { font-size: 13px; color: #666; margin-top: 4px; font-style: italic; }

/* 표현/사실/팁 */
.dd-expression { padding: 6px 0; border-bottom: 1px solid #f0f0f0; font-size: 14px; }
.dd-fun-fact { padding: 8px 0; border-bottom: 1px solid #f0f0f0; }
.dd-exp-tip { padding: 8px 0; border-bottom: 1px solid #f0f0f0; }

/* 토론 질문 */
.dd-discussion-q { display: flex; gap: 8px; padding: 8px 0; align-items: flex-start; }
.dd-q-num {
    background: var(--dingdong-primary); color: #fff; width: 24px; height: 24px;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700; flex-shrink: 0;
}

/* 영상 추천 */
.dd-video-quick-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.dd-tag-btn {
    padding: 4px 12px; border: 1px solid var(--dingdong-border); border-radius: 16px;
    background: #fff; font-size: 13px; cursor: pointer; transition: all 0.15s;
    color: #555;
}
.dd-tag-btn:hover, .dd-tag-btn.active { border-color: var(--dingdong-primary); color: var(--dingdong-primary); background: var(--dingdong-primary-light); }

.dd-video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin-bottom: 20px; }
.dd-video-card { padding: 16px; }
.dd-video-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.dd-video-platform { font-size: 12px; color: #888; }
.dd-video-diff { font-size: 11px; padding: 2px 8px; border-radius: 10px; font-weight: 500; }
.dd-diff-easy { background: #E8F5E9; color: #2E7D32; }
.dd-diff-mid { background: #FFF8E1; color: #F57F17; }
.dd-diff-hard { background: #FFEBEE; color: #C62828; }
.dd-video-title { font-size: 15px; margin: 0 0 4px; }
.dd-video-title-zh { font-size: 13px; color: #666; margin: 0 0 6px; }
.dd-video-desc { font-size: 13px; color: #555; margin: 0 0 8px; }
.dd-video-duration { font-size: 12px; color: #888; }
.dd-video-why { font-size: 13px; color: #444; margin: 8px 0; padding: 8px; background: #FFFBEB; border-radius: 6px; }
.dd-video-vocab { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.dd-video-vocab-tag {
    font-size: 12px; padding: 2px 8px; background: var(--dingdong-primary-light);
    color: var(--dingdong-primary); border-radius: 10px;
}
.dd-video-actions { display: flex; gap: 6px; margin-top: 10px; }

/* 즐겨찾기 목록 */
.dd-bookmark-list { display: flex; flex-direction: column; gap: 8px; }
.dd-bookmark-item {
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
    padding: 10px 14px; background: #F8FAFC; border-radius: 8px; border: 1px solid var(--dingdong-border);
}
.dd-bookmark-info { display: flex; gap: 10px; align-items: flex-start; flex: 1; min-width: 0; }
.dd-bookmark-info strong { font-size: 14px; word-break: break-word; }
.dd-bookmark-actions { display: flex; gap: 6px; flex-shrink: 0; }

@media (max-width: 768px) {
    .dd-recommend-cards { flex-direction: column; }
    .dd-video-grid { grid-template-columns: 1fr; }
    .dd-bookmark-item { flex-direction: column; align-items: flex-start; }
    .dd-bookmark-actions { align-self: flex-end; }
}


/* ================================================================
   Phase 9: 교수자 인라인 편집 + 숏콘텐츠 카드 시스템
   ================================================================ */

/* 레슨 편집 패널 */
.dd-lesson-editor-panel {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--dingdong-border);
}
.dd-lesson-list { display: flex; flex-direction: column; gap: 6px; }
.dd-lesson-row {
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
    padding: 10px 14px; background: #F8FAFC; border-radius: 8px;
    border: 1px solid var(--dingdong-border); transition: background 0.2s;
}
.dd-lesson-row:hover { background: #F0F4F8; }
.dd-lesson-row-info { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; flex: 1; min-width: 0; }
.dd-lesson-row-actions { display: flex; gap: 6px; flex-shrink: 0; }
.dd-lesson-order {
    display: inline-flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; background: var(--dingdong-primary-light);
    color: var(--dingdong-primary); border-radius: 50%; font-size: 12px; font-weight: 600;
}

/* 작은 뱃지들 */
.dd-badge-sm {
    display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 10px;
    font-weight: 500; line-height: 1.4;
}
.dd-badge-green { background: #E8F5E9; color: #2E7D32; }
.dd-badge-gray { background: #ECEFF1; color: #546E7A; }
.dd-badge-blue { background: #E3F2FD; color: #1565C0; }
.dd-badge-orange { background: #FFF3E0; color: #E65100; }
.dd-badge-red { background: #FFEBEE; color: #C62828; }

/* 와이드 모달 */
.dd-modal-wide { max-width: 800px; width: 95%; max-height: 90vh; }
.dd-modal-wide .dd-modal-body { overflow-y: auto; max-height: calc(90vh - 60px); padding: 16px 20px; }

/* 카드 섹션 */
.dd-card-section {
    margin-bottom: 16px; padding: 12px 16px;
    background: #FAFBFC; border: 1px solid var(--dingdong-border); border-radius: 10px;
}
.dd-card-section-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 8px; flex-wrap: wrap; gap: 8px;
}
.dd-card-section-header h4 { margin: 0; font-size: 15px; }
.dd-card-section-body { padding: 4px 0; }

/* 아이템 행 (어휘/문법/퀴즈) */
.dd-item-row {
    display: flex; justify-content: space-between; align-items: flex-start;
    gap: 12px; padding: 8px 12px; margin: 4px 0;
    background: #fff; border-radius: 8px; border: 1px solid #E8ECF0;
    transition: border-color 0.2s;
}
.dd-item-row:hover { border-color: var(--dingdong-primary); }
.dd-item-content { flex: 1; min-width: 0; font-size: 14px; line-height: 1.6; }
.dd-item-actions { display: flex; gap: 4px; align-items: center; flex-shrink: 0; }

/* 상태 버튼 */
.dd-status-btns { display: inline-flex; gap: 2px; }
.dd-status-btn {
    width: 28px; height: 28px; border: 1px solid #E0E0E0; border-radius: 6px;
    background: #fff; cursor: pointer; font-size: 14px; display: flex;
    align-items: center; justify-content: center; transition: all 0.2s;
    padding: 0;
}
.dd-status-btn:hover { background: #F5F5F5; }
.dd-status-btn.active { border-color: var(--dingdong-primary); background: var(--dingdong-primary-light); }
.dd-btn-icon {
    width: 28px; height: 28px; border: 1px solid #E0E0E0; border-radius: 6px;
    background: #fff; cursor: pointer; font-size: 14px; display: flex;
    align-items: center; justify-content: center; padding: 0;
}
.dd-btn-icon:hover { background: #FFF8E1; }

/* 에디터 내부 요소 */
.dd-scene-desc { color: #666; font-style: italic; margin: 4px 0; }
.dd-dialogue-line { padding: 4px 0; }
.dd-ko-sub { color: #666; font-size: 13px; }
.dd-key-expr { margin-top: 8px; padding: 8px 12px; background: #FFFDE7; border-radius: 6px; font-size: 13px; }
.dd-error-note { color: #E65100; font-size: 13px; }
.dd-turn-label { font-weight: 600; color: var(--dingdong-primary); margin-right: 6px; }
.dd-pinyin { color: #888; font-size: 13px; }
.dd-vocab-word { font-weight: 600; font-size: 16px; }

/* 에디터 푸터 */
.dd-editor-footer {
    margin-top: 16px; padding-top: 16px;
    border-top: 1px solid var(--dingdong-border);
    display: flex; gap: 8px; justify-content: flex-end;
}

/* 모바일 대응 */
@media (max-width: 768px) {
    .dd-lesson-row { flex-direction: column; align-items: flex-start; }
    .dd-lesson-row-actions { align-self: flex-end; }
    .dd-item-row { flex-direction: column; }
    .dd-item-actions { align-self: flex-end; }
    .dd-modal-wide { width: 100%; max-height: 100vh; border-radius: 0; }
    .dd-editor-footer { flex-direction: column; }
}

/* 동적 SVG 코스 썸네일 */
.dd-archive-card-thumb-svg {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    min-height: 140px; position: relative;
}
.dd-thumb-icon { font-size: 48px; margin-bottom: 8px; }
.dd-thumb-level {
    font-size: 11px; font-weight: 600; color: #fff; padding: 3px 10px;
    border-radius: 12px; position: absolute; bottom: 12px; right: 12px;
}

/* 영상 embed / 썸네일 */
.dd-video-embed { margin-bottom: 10px; }
.dd-video-thumb { margin-bottom: 10px; }
.dd-video-embed iframe { border-radius: 8px; }

/* ================================================================
   Phase 11: 숏카드 학습 플레이어
   ================================================================ */

/* 플레이어 컨테이너 */
.dd-card-player-wrap { border: 2px solid var(--dingdong-primary); border-radius: 16px; }
.dd-card-player-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 4px; margin-bottom: 8px;
}
.dd-card-player-header h2 { margin: 0; }
.dd-card-player-counter {
    font-size: 13px; color: var(--dingdong-text-light);
    background: #F0F4F8; padding: 4px 12px; border-radius: 12px;
}

/* 카드 슬라이드 영역 */
.dd-card-player {
    min-height: 280px; position: relative;
    touch-action: pan-y;
}
.dd-card-slide {
    animation: ddCardFade 0.3s ease;
}
@keyframes ddCardFade {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 네비게이션 */
.dd-card-player-nav {
    display: flex; justify-content: space-between; align-items: center;
    margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--dingdong-border);
}
.dd-card-dots { display: flex; gap: 6px; }
.dd-card-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: #D0D5DD; transition: all 0.2s;
}
.dd-card-dot.active {
    background: var(--dingdong-primary); width: 20px; border-radius: 4px;
}

/* 카드 공통 */
.dd-sc { padding: 8px 0; }
.dd-sc-label {
    font-size: 13px; font-weight: 600; color: var(--dingdong-primary);
    margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px;
}
.dd-sc-hint { font-size: 12px; color: #999; text-align: center; margin-top: 8px; }

/* TTS 버튼 */
.dd-tts-btn {
    background: none; border: none; font-size: 16px; cursor: pointer;
    padding: 2px 4px; opacity: 0.6; transition: opacity 0.2s;
    vertical-align: middle;
}
.dd-tts-btn:hover { opacity: 1; }

/* 대화 카드 */
.dd-sc-scene { color: #666; font-style: italic; margin-bottom: 12px; }
.dd-sc-line {
    padding: 8px 12px; margin: 4px 0;
    background: #F8FAFC; border-radius: 10px; border-left: 3px solid var(--dingdong-primary);
}
.dd-sc-speaker {
    font-weight: 600; color: var(--dingdong-primary);
    margin-right: 8px; font-size: 13px;
}
.dd-sc-zh { font-size: 16px; }
.dd-sc-ko { display: block; font-size: 13px; color: #888; margin-top: 2px; margin-left: 30px; }
.dd-sc-key {
    margin-top: 12px; padding: 10px 14px;
    background: #FFFDE7; border-radius: 8px; font-size: 14px;
}

/* 플래시카드 */
.dd-sc-vocab-cards { display: flex; flex-direction: column; gap: 10px; }
.dd-flash-card {
    padding: 16px; background: #F8FAFC; border: 1px solid var(--dingdong-border);
    border-radius: 12px; cursor: pointer; transition: all 0.2s;
    text-align: center;
}
.dd-flash-card:hover { border-color: var(--dingdong-primary); }
.dd-flash-word { font-size: 28px; font-weight: 600; }
.dd-flash-pinyin { color: #888; font-size: 14px; }
.dd-flash-meaning { font-size: 16px; font-weight: 500; }
.dd-flash-ex { font-size: 14px; color: #555; margin: 6px 0 0; }
.dd-flash-back { margin-top: 8px; padding-top: 8px; border-top: 1px dashed #ddd; }

/* 문법 카드 */
.dd-sc-grammar-pattern {
    font-size: 22px; font-weight: 600; text-align: center;
    padding: 16px; background: #FFF8E1; border-radius: 12px; margin-bottom: 12px;
}
.dd-sc-grammar-explain { font-size: 15px; line-height: 1.6; }
.dd-sc-grammar-ex {
    padding: 8px 12px; margin: 6px 0;
    background: #F0FFF0; border-radius: 8px; font-size: 15px;
}
.dd-sc-error {
    margin-top: 10px; padding: 8px 12px;
    background: #FFF3E0; border-radius: 8px; color: #E65100; font-size: 13px;
}

/* 퀴즈 카드 */
.dd-sc-quiz-q { margin-bottom: 16px; }
.dd-sc-quiz-text { font-size: 15px; margin-bottom: 8px; }
.dd-sc-quiz-opts { display: flex; flex-direction: column; gap: 6px; }
.dd-sc-quiz-opt {
    padding: 10px 14px; border: 1px solid var(--dingdong-border);
    border-radius: 10px; background: #fff; cursor: pointer;
    font-size: 14px; text-align: left; transition: all 0.2s;
    color: var(--dingdong-text); display: flex; align-items: center; gap: 8px;
}
.dd-sc-quiz-opt:hover:not(:disabled) { border-color: var(--dingdong-primary); background: var(--dingdong-primary-light); }
.dd-sc-quiz-opt:disabled { cursor: default; opacity: 0.8; }
.dd-quiz-correct { background: #E8F5E9 !important; border-color: #4CAF50 !important; color: #2E7D32; }
.dd-quiz-wrong { background: #FFEBEE !important; border-color: #F44336 !important; color: #C62828; }
.dd-sc-quiz-feedback { margin-top: 6px; font-size: 14px; font-weight: 500; padding: 6px 10px; border-radius: 6px; }
/* v6.6: 퀴즈 유형 배지 + 선택지 레이블 */
.dd-quiz-type-badge {
    display: inline-block; font-size: 11px; font-weight: 600;
    padding: 2px 8px; border-radius: 10px; margin-right: 4px;
    background: var(--dingdong-primary-light, #FFF1F0); color: var(--dingdong-primary, #B83B3B);
    vertical-align: middle;
}
.dd-opt-label {
    display: inline-flex; align-items: center; justify-content: center;
    width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0;
    background: var(--dingdong-primary-light, #FFF1F0); color: var(--dingdong-primary, #B83B3B);
    font-size: 12px; font-weight: 700;
}

/* 롤플레이 카드 */
.dd-sc-rp-turn {
    padding: 10px 14px; margin: 6px 0;
    background: #F0F8FF; border-radius: 10px; border-left: 3px solid #2196F3;
    font-size: 15px;
}
.dd-sc-rp-label { font-weight: 600; color: #1565C0; font-size: 13px; }

/* 완료 카드 */
.dd-sc-culture-zh { font-size: 15px; line-height: 1.6; margin-bottom: 8px; }
.dd-sc-culture-ko { font-size: 14px; color: #555; }
.dd-sc-done { text-align: center; padding: 24px 0; margin-top: 16px; }
.dd-sc-done-icon { font-size: 48px; margin-bottom: 8px; animation: ddBounce 0.6s; }
@keyframes ddBounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}
.dd-sc-done h3 { margin: 8px 0 4px; }
.dd-sc-done p { color: #888; font-size: 14px; }

/* 모바일 최적화 */
@media (max-width: 768px) {
    .dd-card-player { min-height: 240px; }
    .dd-flash-word { font-size: 24px; }
    .dd-sc-grammar-pattern { font-size: 18px; padding: 12px; }
    .dd-card-player-nav { flex-wrap: wrap; gap: 8px; justify-content: center; }
}

/* 수동 다크 모드 (클래스 기반) */
html.dd-dark {
    --dingdong-bg: #1A1B1E;
    --dingdong-card-bg: #242529;
    --dingdong-text: #E5E7EB;
    --dingdong-text-light: #9CA3AF;
    --dingdong-border: #374151;
    --dingdong-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --dingdong-primary-light: rgba(184, 59, 59, 0.15);
    --dingdong-accent-light: rgba(201, 168, 76, 0.12);
}
html.dd-dark .dd-dashboard-wrap { background: var(--dingdong-bg) !important; color: var(--dingdong-text); }
html.dd-dark .dd-sidebar { background: #1F2023 !important; border-color: var(--dingdong-border) !important; }
html.dd-dark .dd-sidebar-item { color: var(--dingdong-text-light) !important; }
html.dd-dark .dd-sidebar-item:hover, html.dd-dark .dd-sidebar-item.active { background: var(--dingdong-primary-light) !important; color: var(--dingdong-primary) !important; }
html.dd-dark .dingdong-card { background: var(--dingdong-card-bg) !important; border-color: var(--dingdong-border) !important; color: var(--dingdong-text) !important; }
html.dd-dark .dingdong-input { background: #2D2E33 !important; color: var(--dingdong-text) !important; border-color: var(--dingdong-border) !important; }
html.dd-dark .dd-lesson-wrap, html.dd-dark .dd-lesson { background: var(--dingdong-bg); color: var(--dingdong-text); }
html.dd-dark .dd-lesson-sidebar { background: #1F2023 !important; }
html.dd-dark .dd-course-card, html.dd-dark .dd-archive-card { background: var(--dingdong-card-bg) !important; color: var(--dingdong-text) !important; }
html.dd-dark .dd-modal { background: var(--dingdong-card-bg) !important; color: var(--dingdong-text) !important; }
html.dd-dark .dd-analytics-table th { background: #2D2E33 !important; }
html.dd-dark .dd-tag-btn { background: #2D2E33 !important; color: var(--dingdong-text-light) !important; }

/* 다크모드 추가 텍스트 가시성 수정 */
html.dd-dark, html.dd-dark body { color: var(--dingdong-text) !important; }
html.dd-dark h1, html.dd-dark h2, html.dd-dark h3, html.dd-dark h4, html.dd-dark h5 { color: var(--dingdong-text) !important; }
html.dd-dark p, html.dd-dark span, html.dd-dark label, html.dd-dark td, html.dd-dark th { color: var(--dingdong-text) !important; }
html.dd-dark small, html.dd-dark .dd-placeholder { color: var(--dingdong-text-light) !important; }
html.dd-dark a:not(.dingdong-btn) { color: var(--dingdong-primary) !important; }
html.dd-dark select { background: #2D2E33 !important; color: var(--dingdong-text) !important; border-color: var(--dingdong-border) !important; }
html.dd-dark .dd-sc-quiz-opt { background: #2D2E33 !important; color: var(--dingdong-text) !important; }
html.dd-dark .dd-sc-ko, html.dd-dark .dd-sc-scene { color: var(--dingdong-text-light) !important; }
html.dd-dark .dd-flash-meaning, html.dd-dark .dd-flash-pinyin { color: var(--dingdong-text-light) !important; }
html.dd-dark .dd-sc-grammar-explain { color: var(--dingdong-text) !important; }
html.dd-dark .dd-sc-quiz-feedback { color: var(--dingdong-text) !important; }
html.dd-dark .dd-vocab-meaning, html.dd-dark .dd-vocab-py { color: var(--dingdong-text-light) !important; }
html.dd-dark .dd-course-card-ko, html.dd-dark .dd-archive-card-ko { color: var(--dingdong-text-light) !important; }
html.dd-dark .dd-profile-meta { color: #B0B8C4 !important; }
html.dd-dark .dd-video-desc, html.dd-dark .dd-video-why { color: var(--dingdong-text-light) !important; }
html.dd-dark .dd-video-why { background: #2D2E33 !important; }
html.dd-dark .dd-sc-done p { color: var(--dingdong-text-light) !important; }
html.dd-dark .dd-sc-culture-ko { color: var(--dingdong-text-light) !important; }
html.dd-dark .dd-form-group label { color: var(--dingdong-text) !important; }
html.dd-dark .dd-quick-link { background: var(--dingdong-card-bg) !important; color: var(--dingdong-text) !important; border-color: var(--dingdong-border) !important; }
html.dd-dark .dd-badge-sm { opacity: 0.9; }
html.dd-dark .dd-emoji-opt { background: #2D2E33 !important; border-color: var(--dingdong-border) !important; }

/* 수동 라이트 강제 (다크 OS에서 라이트 선택 시) */
html.dd-light {
    --dingdong-bg: #FAF9F7;
    --dingdong-card-bg: #FFFFFF;
    --dingdong-text: #2C3039;
    --dingdong-text-light: #6B7280;
    --dingdong-border: #E8E5DF;
    --dingdong-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* 숏카드 완료 → 다음 단계 버튼 */
.dd-sc-next-steps { display: flex; gap: 8px; justify-content: center; margin-top: 12px; flex-wrap: wrap; }

/* 퀴즈 히스토리 삭제 버튼 */
.dd-history-item { position: relative; }
.dd-history-item .dd-btn-icon { position: absolute; top: 8px; right: 8px; opacity: 0; transition: opacity 0.2s; }
.dd-history-item:hover .dd-btn-icon { opacity: 1; }

/* ═══ Phase 10: 커뮤니티 ═══ */
.dd-community-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 8px; }
.dd-community-filters { display: flex; gap: 8px; flex-wrap: wrap; }
.dd-community-filters .dd-filter-select { min-width: 120px; }

/* 토론 카드 */
.dd-comm-topic-card { cursor: pointer; transition: box-shadow 0.2s, transform 0.15s; }
.dd-comm-topic-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.08); transform: translateY(-1px); }
.dd-comm-topic-header { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.dd-comm-avatar { font-size: 1.6rem; line-height: 1; }
.dd-comm-avatar-lg { font-size: 2rem; }
.dd-comm-avatar-sm { font-size: 1.2rem; }
.dd-comm-topic-meta { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; flex: 1; }
.dd-comm-author { font-weight: 600; color: var(--dingdong-text); }
.dd-comm-course-badge { background: var(--dingdong-primary, #B83B3B); color: #fff; padding: 1px 8px; border-radius: 10px; font-size: 0.75rem; }
.dd-comm-date { color: var(--dingdong-text-muted, #999); font-size: 0.8rem; }
.dd-comm-topic-title { margin: 0 0 6px; font-size: 1.05rem; color: var(--dingdong-text); cursor: pointer; }
.dd-comm-topic-title:hover { color: var(--dingdong-primary, #B83B3B); }
.dd-comm-topic-excerpt { color: var(--dingdong-text-light, #6B7280); font-size: 0.9rem; margin: 0 0 8px; line-height: 1.5; }
.dd-comm-tags { display: flex; gap: 4px; flex-wrap: wrap; margin: 6px 0; }
.dd-comm-tag { background: var(--dingdong-bg-alt, #F3F4F6); color: var(--dingdong-text-light); padding: 2px 8px; border-radius: 8px; font-size: 0.78rem; }
.dd-comm-topic-actions { display: flex; gap: 12px; padding-top: 8px; border-top: 1px solid var(--dingdong-border, #E8E5DF); }
.dd-comm-topic-actions button { background: none; border: none; cursor: pointer; color: var(--dingdong-text-muted); font-size: 0.88rem; padding: 4px 8px; border-radius: 6px; transition: background 0.15s; }
.dd-comm-topic-actions button:hover { background: var(--dingdong-bg-alt, #F3F4F6); }

/* 좋아요 */
.dd-comm-like-btn { transition: transform 0.2s; }
.dd-comm-like-btn.dd-liked { color: var(--dingdong-danger, #E53E3E) !important; }
.dd-comm-like-btn:active { transform: scale(1.15); }

/* 상세 모달 */
.dd-comm-detail-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.dd-comm-detail-body { line-height: 1.7; margin: 12px 0; color: var(--dingdong-text); white-space: pre-wrap; }
.dd-comm-detail-actions { display: flex; gap: 12px; align-items: center; margin: 12px 0; }
.dd-comm-detail-actions button { font-size: 0.88rem; }

/* 댓글 */
.dd-comm-comments-section { margin-top: 8px; }
.dd-comm-comment-form { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 16px; }
.dd-comm-comment-form textarea { flex: 1; }
.dd-comm-comment { padding: 10px 0; border-bottom: 1px solid var(--dingdong-border, #E8E5DF); }
.dd-comm-comment:last-child { border-bottom: none; }
.dd-comm-reply { margin-left: 32px; padding-left: 12px; border-left: 2px solid var(--dingdong-border, #E8E5DF); }
.dd-comm-comment-header { display: flex; align-items: center; gap: 6px; margin-bottom: 4px; }
.dd-comm-comment-body { margin: 4px 0; line-height: 1.6; color: var(--dingdong-text); }
.dd-comm-comment-actions { display: flex; gap: 8px; margin-top: 4px; }
.dd-comm-comment-actions button { background: none; border: none; cursor: pointer; font-size: 0.8rem; color: var(--dingdong-text-muted); padding: 2px 6px; border-radius: 4px; }
.dd-comm-comment-actions button:hover { background: var(--dingdong-bg-alt, #F3F4F6); }
.dd-comm-reply-form { margin: 8px 0 8px 32px; }
.dd-comm-reply-form textarea { width: 100%; margin-bottom: 4px; }

/* 투표 */
.dd-comm-poll { margin: 12px 0; }
.dd-comm-poll h5 { margin: 0 0 10px; font-size: 1rem; }
.dd-comm-poll-expired { color: var(--dingdong-text-muted); font-size: 0.8rem; font-style: italic; }
.dd-poll-option { display: block; padding: 8px 12px; margin: 4px 0; background: var(--dingdong-bg-alt, #F8F9FA); border-radius: 8px; cursor: pointer; transition: background 0.15s; }
.dd-poll-option:hover { background: #E8E5DF; }
.dd-poll-option input { margin-right: 8px; }
.dd-poll-result { position: relative; padding: 8px 12px; margin: 4px 0; background: var(--dingdong-bg-alt, #F8F9FA); border-radius: 8px; overflow: hidden; display: flex; justify-content: space-between; align-items: center; }
.dd-poll-result.dd-poll-voted { border: 2px solid var(--dingdong-primary, #B83B3B); }
.dd-poll-bar { position: absolute; left: 0; top: 0; bottom: 0; background: rgba(184, 59, 59, 0.12); transition: width 0.5s ease; border-radius: 8px; }
.dd-poll-label { position: relative; z-index: 1; font-weight: 500; }
.dd-poll-pct { position: relative; z-index: 1; font-size: 0.85rem; color: var(--dingdong-text-muted); }
.dd-poll-total { text-align: center; font-size: 0.82rem; color: var(--dingdong-text-muted); margin-top: 6px; }

/* 페이지네이션 */
.dd-pagination { display: flex; justify-content: center; align-items: center; gap: 12px; margin-top: 16px; }
.dd-page-info { font-size: 0.9rem; color: var(--dingdong-text-muted); }

/* 모달 크기 */
.dd-modal-md { max-width: 540px; width: 95%; }

/* 폼 액션 */
.dd-form-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 12px; }

/* 투표 선택지 목록 */
.dd-poll-option-list { display: flex; flex-direction: column; gap: 4px; }

/* 모바일 커뮤니티 */
@media (max-width: 768px) {
    .dd-community-header { flex-direction: column; align-items: stretch; }
    .dd-community-filters { flex-direction: column; }
    .dd-comm-comment-form { flex-direction: column; }
    .dd-comm-reply { margin-left: 16px; }
}

/* 다크 모드 커뮤니티 */
.dd-dark .dd-comm-tag { background: #374151; color: #D1D5DB; }
.dd-dark .dd-poll-option { background: #374151; }
.dd-dark .dd-poll-option:hover { background: #4B5563; }
.dd-dark .dd-poll-result { background: #374151; }
.dd-dark .dd-poll-bar { background: rgba(184, 59, 59, 0.25); }

/* ═══ 롤플레잉 캐릭터 헤더 ═══ */
.dd-rp-char-header { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.dd-rp-char-avatar { font-size: 1.8rem; line-height: 1; }
.dd-rp-char-meta { flex: 1; }

/* ═══ v5.7 에러 박스 (돌아가기 + 다시 시도) ═══ */
.dd-error-box {
    text-align: center;
    padding: 32px 20px;
    background: #FEF2F2;
    border: 1px solid #FCA5A5;
    border-radius: 12px;
    margin: 16px 0;
}
.dd-error-box .dd-error-msg {
    color: #991B1B;
    margin: 0 0 16px;
    line-height: 1.5;
    font-size: 0.95rem;
}
.dd-btn-back,
.dd-btn-retry {
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: opacity 0.2s;
}
.dd-btn-back { background: #E5E7EB; color: #374151; }
.dd-btn-back:hover { background: #D1D5DB; }
.dd-btn-retry { background: var(--dingdong-primary, #B83B3B); color: #fff; }
.dd-btn-retry:hover { opacity: 0.85; }

/* ═══ v5.7 다크배경 글씨 가독성 강제 ═══ */
.dd-dashboard-wrap,
.dd-at-wrap,
.dd-lesson-wrap,
.dd-course-wrap,
.dd-archive-wrap {
    color: var(--dingdong-text, #2C3039) !important;
}
.dd-dashboard-wrap input,
.dd-dashboard-wrap textarea,
.dd-dashboard-wrap select,
.dd-at-wrap input,
.dd-at-wrap textarea,
.dd-at-wrap select,
.dd-lesson-wrap input,
.dd-lesson-wrap textarea {
    color: var(--dingdong-text, #2C3039) !important;
    background: #fff !important;
}
/* 가사 따라쓰기 input 글자색 강제 — Astra 테마 충돌 방지 */
.dd-lyrics-input,
.dd-drama-input {
    color: var(--dingdong-text, #2C3039) !important;
}

/* select 요소 — 화살표 겹침 방지 전역 처리 */
select.dingdong-input {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.8' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px !important;  /* 화살표 공간 확보 */
    cursor: pointer;
}
/* Astra 테마 충돌 방지 */
.dd-dashboard-wrap select.dingdong-input,
.dd-at-wrap select.dingdong-input,
.dd-lesson-wrap select.dingdong-input {
    height: 42px;
    line-height: 1.4;
    padding-top: 8px;
    padding-bottom: 8px;
    padding-left: 12px;
    position: relative;
    z-index: 1;
    color: var(--dingdong-text, #2C3039) !important;
    background-color: #fff !important;
}
/* 카드 내부 텍스트도 강제 */
.dingdong-card,
.dingdong-card p,
.dingdong-card h3,
.dingdong-card h4,
.dingdong-card li,
.dingdong-card label,
.dingdong-card span {
    color: var(--dingdong-text, #2C3039);
}
/* 프로필 헤더 (어두운 배경) - 흰색 유지 */
.dd-profile-header,
.dd-profile-header * { color: #fff !important; }
.dd-profile-header .dd-stat-label { color: rgba(255,255,255,0.7) !important; }

/* ═══ v5.7 영상 추천 카드 ═══ */
.dd-vid-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 8px;
}
.dd-vid-item {
    background: var(--dingdong-bg-alt, #F8FAFC);
    border: 1px solid var(--dingdong-border, #E5E7EB);
    border-radius: 12px;
    padding: 16px;
    transition: box-shadow 0.2s;
}
.dd-vid-item:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.dd-vid-why { font-size: 0.85rem; color: #6366F1; margin: 4px 0 10px; }
.dd-vid-links { display: flex; gap: 8px; flex-wrap: wrap; }

/* 다크 모드 에러/영상 */
.dd-dark .dd-error-box { background: #451A1A; border-color: #7F1D1D; }
.dd-dark .dd-error-box .dd-error-msg { color: #FCA5A5; }
.dd-dark .dd-btn-back { background: #374151; color: #D1D5DB; }
.dd-dark .dd-vid-item { background: #1F2937; border-color: #374151; }
.dd-dark .dd-vid-why { color: #A5B4FC; }


/* ═══ v6.4 핵심어휘 품사 배지 가독성 개선 ═══ */
.dd-vocab-pos,
.dd-vocab-row-main .dd-vocab-pos {
    color: #fff !important;
    background: #4A6FA5 !important;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 10px;
    display: inline-block;
    letter-spacing: 0.3px;
    text-shadow: 0 1px 1px rgba(0,0,0,0.2);
}

/* ═══════════════════════════════════════════
   v6.9.0 — 블록형 교수자 도구 UI
   ═══════════════════════════════════════════ */

/* 교수자 도구 블록 — details 대신 비주얼 블록 */
.dd-instructor-tool {
    position: relative;
}
.dd-instructor-tool::before {
    content: '🛠';
    position: absolute;
    top: -8px; right: 16px;
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: #fff;
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 10px;
    z-index: 1;
    box-shadow: 0 2px 8px rgba(245,158,11,0.3);
}

/* 교수자 도구 그리드 */
.dd-tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.dd-tool-block {
    background: var(--dingdong-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 14px;
    padding: 20px;
    transition: all var(--dingdong-transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.dd-tool-block::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--dd-tool-color, var(--dingdong-primary));
    border-radius: 3px 3px 0 0;
}

.dd-tool-block:hover {
    transform: translateY(-3px);
    box-shadow: var(--dingdong-shadow-md);
    border-color: var(--dd-tool-color, var(--dingdong-primary));
}

.dd-tool-block-icon {
    width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 12px;
    font-size: 22px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, rgba(184,59,59,0.08), rgba(201,168,76,0.08));
}

.dd-tool-block h4 {
    margin: 0 0 4px; font-size: 15px; font-weight: 700;
}

.dd-tool-block p {
    margin: 0; font-size: 13px; color: var(--dingdong-text-light); line-height: 1.4;
}

.dd-tool-block .dd-tool-badge {
    position: absolute; top: 12px; right: 12px;
    font-size: 11px; padding: 2px 8px; border-radius: 8px;
    background: rgba(45,139,85,0.1); color: #2D8B55;
    font-weight: 600;
}

/* 교수자 도구 확장 패널 */
.dd-tool-expand {
    display: none;
    margin-top: 16px;
    padding: 20px;
    background: rgba(248,250,252,0.8);
    border: 1px solid var(--dingdong-border);
    border-radius: 14px;
    animation: dd-tool-expand-in 0.25s ease;
}

.dd-tool-expand.active {
    display: block;
}

@keyframes dd-tool-expand-in {
    from { opacity: 0; max-height: 0; }
    to { opacity: 1; max-height: 600px; }
}

/* 교수자 도구 색상 변형 */
.dd-tool-block[data-tool="content"] { --dd-tool-color: #2563EB; }
.dd-tool-block[data-tool="content"] .dd-tool-block-icon { background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(96,165,250,0.1)); }
.dd-tool-block[data-tool="cards"] { --dd-tool-color: #7C3AED; }
.dd-tool-block[data-tool="cards"] .dd-tool-block-icon { background: linear-gradient(135deg, rgba(124,58,237,0.1), rgba(167,139,250,0.1)); }
.dd-tool-block[data-tool="slides"] { --dd-tool-color: #059669; }
.dd-tool-block[data-tool="slides"] .dd-tool-block-icon { background: linear-gradient(135deg, rgba(5,150,105,0.1), rgba(52,211,153,0.1)); }
.dd-tool-block[data-tool="quiz"] { --dd-tool-color: #D97706; }
.dd-tool-block[data-tool="quiz"] .dd-tool-block-icon { background: linear-gradient(135deg, rgba(217,119,6,0.1), rgba(251,191,36,0.1)); }
.dd-tool-block[data-tool="embed"] { --dd-tool-color: #DC2626; }
.dd-tool-block[data-tool="embed"] .dd-tool-block-icon { background: linear-gradient(135deg, rgba(220,38,38,0.1), rgba(252,165,165,0.1)); }
.dd-tool-block[data-tool="html"] { --dd-tool-color: #0891B2; }
.dd-tool-block[data-tool="html"] .dd-tool-block-icon { background: linear-gradient(135deg, rgba(8,145,178,0.1), rgba(103,232,249,0.1)); }

/* ═══════════════════════════════════════════
   v6.9.0 — HTML 임베드 블록
   ═══════════════════════════════════════════ */

.dd-html-embed-section {
    margin-bottom: 16px;
}

.dd-html-embed-block {
    background: var(--dingdong-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 14px;
    overflow: hidden;
    margin-bottom: 12px;
    transition: box-shadow var(--dingdong-transition);
}

.dd-html-embed-block:hover {
    box-shadow: var(--dingdong-shadow-md);
}

.dd-html-embed-header {
    display: flex; align-items: center; gap: 8px;
    padding: 12px 16px;
    background: linear-gradient(135deg, rgba(8,145,178,0.06), rgba(103,232,249,0.04));
    border-bottom: 1px solid var(--dingdong-border);
    font-size: 13px; font-weight: 600;
}

.dd-html-embed-header .dd-html-icon {
    width: 28px; height: 28px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #0891B2, #06B6D4);
    color: #fff; border-radius: 8px; font-size: 14px;
}

.dd-html-embed-body {
    padding: 16px;
}

.dd-html-embed-body iframe {
    border: none; width: 100%; border-radius: 8px;
    resize: vertical; overflow: auto;
    min-height: 200px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

/* 교수자 HTML 편집기 */
.dd-html-editor-wrap {
    margin-top: 12px;
}

.dd-html-editor {
    width: 100%;
    min-height: 120px;
    padding: 14px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.6;
    border: 2px solid var(--dingdong-border);
    border-radius: 10px;
    background: #1E293B;
    color: #E2E8F0;
    resize: vertical;
    transition: border-color var(--dingdong-transition);
}

.dd-html-editor:focus {
    border-color: #0891B2;
    box-shadow: 0 0 0 3px rgba(8,145,178,0.1);
    outline: none;
}

.dd-html-preview {
    margin-top: 12px;
    padding: 16px;
    border: 1px dashed var(--dingdong-border);
    border-radius: 10px;
    background: rgba(248,250,252,0.8);
    min-height: 60px;
}

.dd-html-preview-label {
    font-size: 11px; font-weight: 700; text-transform: uppercase;
    color: var(--dingdong-text-light); margin-bottom: 8px;
    letter-spacing: 0.5px;
}

/* 교수자 HTML 블록 목록 */
.dd-html-blocks-list {
    display: flex; flex-direction: column; gap: 8px;
    margin-top: 12px;
}

.dd-html-block-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 14px;
    background: rgba(248,250,252,0.8);
    border: 1px solid var(--dingdong-border);
    border-radius: 10px;
    font-size: 13px;
}

.dd-html-block-item .dd-html-block-title {
    flex: 1; font-weight: 600;
}

.dd-html-block-item .dd-html-block-actions {
    display: flex; gap: 4px;
}

.dd-html-block-item .dd-html-block-actions button {
    padding: 4px 8px;
    border: 1px solid var(--dingdong-border);
    border-radius: 6px;
    background: #fff;
    font-size: 12px;
    cursor: pointer;
    transition: all var(--dingdong-transition);
}

.dd-html-block-item .dd-html-block-actions button:hover {
    border-color: var(--dingdong-primary);
    background: var(--dingdong-primary-light);
}

/* ═══════════════════════════════════════════
   v6.9.0 — 추가 마이크로 인터랙션
   ═══════════════════════════════════════════ */

/* 이모지 아바타 hover bounce */
.dd-emoji-avatar {
    transition: transform var(--dingdong-transition-spring);
}
.dd-emoji-avatar:hover {
    transform: scale(1.15) rotate(-5deg);
}
.dd-emoji-avatar-xl {
    font-size: 2.8rem;
    line-height: 1;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.15));
}

/* 뱃지 pulse */
.dingdong-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    background: var(--dingdong-secondary) !important;
    color: #fff !important;
    font-size: 11px;
    font-weight: 600;
    text-decoration: none !important;
    transition: transform var(--dingdong-transition);
}
.dingdong-badge:hover {
    transform: scale(1.05);
}

/* 퀵 링크 카드 hover */
.dd-quick-link {
    transition: all var(--dingdong-transition);
    border-radius: 14px;
}
.dd-quick-link:hover {
    transform: translateY(-3px);
    box-shadow: var(--dingdong-shadow-md);
}
.dd-quick-link .dd-quick-icon {
    transition: transform var(--dingdong-transition-spring);
}
.dd-quick-link:hover .dd-quick-icon {
    transform: scale(1.2);
}

/* 사이드바 학습도구 hover */
.dd-sidebar-tool-item {
    display: flex; align-items: center; gap: 8px; padding: 8px 18px;
    font-size: 13px; text-decoration: none; color: var(--dingdong-text);
    transition: all var(--dingdong-transition); border-left: 2px solid transparent;
    font-weight: 400;
    border-radius: 0 8px 8px 0;
}
.dd-sidebar-tool-item:hover {
    color: var(--dingdong-primary); background: rgba(184,59,59,0.04);
    border-left-color: var(--dingdong-primary);
    transform: translateX(4px);
}

/* 스피너 개선 */
.dingdong-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--dingdong-border);
    border-top-color: var(--dingdong-primary);
    border-radius: 50%;
    animation: dingdong-spin 0.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

/* 슬라이드 뷰어 개선 */
.dd-slide-viewer {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: inset 0 0 0 1px rgba(232,229,223,0.3);
}

/* 코스 아카이브 카드 hover 강화 */
.dd-archive-card {
    transition: all var(--dingdong-transition-spring);
}
.dd-archive-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--dingdong-shadow-lg);
}

/* 입력 필드 focus 강화 */
.dingdong-input:focus {
    outline: none;
    border-color: var(--dingdong-primary);
    box-shadow: 0 0 0 3px rgba(184,59,59,0.08), 0 2px 8px rgba(184,59,59,0.06);
}

/* 커뮤니티 토론 카드 hover 강화 */
.dd-comm-topic-card {
    cursor: pointer;
    transition: all var(--dingdong-transition);
    border-radius: 14px;
}
.dd-comm-topic-card:hover {
    box-shadow: var(--dingdong-shadow-md);
    transform: translateY(-2px);
}

/* ═══════════════════════════════════════════
   v6.9.2 — 학습자 포트폴리오 (역동적 레이아웃)
   ═══════════════════════════════════════════ */

/* 히어로 프로필 카드 */
.dd-pf-hero {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 16px;
    min-height: 180px;
}

.dd-pf-hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #2C3E50 0%, #3D5A73 40%, #4A7A8C 70%, #5B9AA8 100%);
    z-index: 0;
}

.dd-pf-hero-bg::after {
    content: '';
    position: absolute;
    top: -60px; right: -40px;
    width: 280px; height: 280px;
    background: radial-gradient(circle, rgba(201,168,76,0.2) 0%, transparent 70%);
}

.dd-pf-hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 28px 32px;
    color: #fff;
}

.dd-pf-avatar-wrap {
    position: relative;
    flex-shrink: 0;
}

.dd-pf-avatar-big {
    font-size: 4rem;
    line-height: 1;
    display: block;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3));
}

.dd-pf-level-ring {
    position: absolute;
    bottom: -6px; left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--dingdong-primary), #D44E4E);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 2px 10px;
    border-radius: 10px;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(184,59,59,0.4);
}

.dd-pf-hero-info {
    flex: 1;
    min-width: 0;
}

.dd-pf-hero-name {
    margin: 0 0 6px;
    font-size: 1.6rem;
    font-weight: 800;
    color: #fff !important;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.dd-pf-hero-goal {
    font-size: 0.9rem;
    color: var(--dingdong-accent, #C9A84C) !important;
    font-weight: 600;
    margin-bottom: 6px;
}

.dd-pf-hero-bio {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.8) !important;
    line-height: 1.5;
    margin: 0 0 6px;
}

.dd-pf-hero-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.dd-pf-tag {
    background: rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.9) !important;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 0.78rem;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.1);
}

.dd-pf-hero-badges {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

.dd-pf-badge-pill {
    padding: 5px 14px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
    text-align: center;
    backdrop-filter: blur(8px);
}

.dd-pf-badge-fire {
    background: rgba(251,146,60,0.25);
    color: #FCD34D !important;
    border: 1px solid rgba(251,146,60,0.3);
}

.dd-pf-badge-day {
    background: rgba(99,102,241,0.2);
    color: #C7D2FE !important;
    border: 1px solid rgba(99,102,241,0.25);
}

.dd-pf-badge-act {
    background: rgba(52,211,153,0.2);
    color: #A7F3D0 !important;
    border: 1px solid rgba(52,211,153,0.25);
}

/* KPI 스트립 */
.dd-pf-kpi-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    background: var(--dingdong-glass);
    backdrop-filter: blur(var(--dingdong-glass-blur));
    -webkit-backdrop-filter: blur(var(--dingdong-glass-blur));
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 16px;
    padding: 18px 12px;
    margin-bottom: 16px;
    box-shadow: var(--dingdong-shadow);
}

.dd-pf-kpi {
    flex: 1;
    text-align: center;
    padding: 0 12px;
}

.dd-pf-kpi-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dingdong-primary) !important;
    line-height: 1.2;
}

.dd-pf-kpi-value small {
    font-size: 0.7em;
    font-weight: 600;
}

.dd-pf-kpi-label {
    font-size: 0.75rem;
    color: var(--dingdong-text-light) !important;
    margin-top: 2px;
}

.dd-pf-kpi-divider {
    width: 1px;
    height: 36px;
    background: var(--dingdong-border);
    flex-shrink: 0;
}

/* 성과 카드 그리드 */
.dd-pf-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.dd-pf-card {
    background: var(--dingdong-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 14px;
    padding: 18px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    transition: all var(--dingdong-transition);
    position: relative;
    overflow: hidden;
}

.dd-pf-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--dingdong-shadow-md);
}

.dd-pf-card-wide {
    grid-column: 1 / -1;
}

.dd-pf-card-icon {
    font-size: 2rem;
    line-height: 1;
    flex-shrink: 0;
}

.dd-pf-card-body {
    flex: 1;
    min-width: 0;
}

.dd-pf-card-body h4 {
    margin: 0 0 8px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dingdong-text) !important;
}

.dd-pf-card-nums {
    display: flex;
    gap: 16px;
    margin-bottom: 10px;
    font-size: 0.88rem;
    color: var(--dingdong-text) !important;
}

.dd-pf-card-nums strong {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--dingdong-primary) !important;
}

.dd-pf-card-bar {
    height: 6px;
    background: var(--dingdong-border);
    border-radius: 3px;
    overflow: hidden;
}

.dd-pf-card-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 어휘 전체 너비 카드 */
.dd-pf-vocab-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.dd-pf-vocab-stat {
    text-align: center;
}

.dd-pf-vocab-num {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--dingdong-primary) !important;
}

.dd-pf-vocab-label {
    font-size: 0.75rem;
    color: var(--dingdong-text-light) !important;
}

.dd-pf-vocab-progress {
    flex: 1;
    min-width: 120px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 타임라인 */
.dd-pf-timeline {
    position: relative;
    padding-left: 20px;
}

.dd-pf-timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--dingdong-primary), var(--dingdong-border));
    border-radius: 1px;
}

.dd-pf-tl-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    position: relative;
    transition: background var(--dingdong-transition);
}

.dd-pf-tl-item:hover {
    background: rgba(184,59,59,0.02);
    border-radius: 8px;
}

.dd-pf-tl-dot {
    position: absolute;
    left: -18px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 0 0 2px var(--dingdong-border);
    z-index: 1;
}

.dd-pf-tl-icon {
    font-size: 1.1rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dingdong-primary-light);
    border-radius: 8px;
    flex-shrink: 0;
}

.dd-pf-tl-body {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.dd-pf-tl-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.dd-pf-tl-title {
    font-size: 0.88rem;
    color: var(--dingdong-text) !important;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dd-pf-tl-score {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--dingdong-accent) !important;
    background: var(--dingdong-accent-light);
    padding: 1px 8px;
    border-radius: 8px;
}

.dd-pf-tl-date {
    font-size: 0.75rem;
    color: var(--dingdong-text-light) !important;
    white-space: nowrap;
    flex-shrink: 0;
}

/* 모바일 포트폴리오 */
@media (max-width: 768px) {
    .dd-pf-hero-content {
        flex-direction: column;
        text-align: center;
        padding: 20px 16px;
    }
    .dd-pf-hero-badges {
        flex-direction: row;
        justify-content: center;
    }
    .dd-pf-hero-tags { justify-content: center; }
    .dd-pf-kpi-strip { flex-wrap: wrap; gap: 8px; }
    .dd-pf-kpi-divider { display: none; }
    .dd-pf-kpi { min-width: 70px; }
    .dd-pf-grid { grid-template-columns: 1fr; }
    .dd-pf-card-wide { grid-column: auto; }
    .dd-pf-vocab-stats { flex-direction: column; gap: 12px; }
}

/* ═══════════════════════════════════════════
   v7.8.0 — 포트폴리오 학생 프로필 카드
   ═══════════════════════════════════════════ */
.dd-pf-student-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 28px;
    background: #fff;
    border: 2px solid var(--dingdong-border);
    border-radius: 18px;
    margin-bottom: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    position: relative;
    overflow: hidden;
}
.dd-pf-student-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--dingdong-primary), var(--dingdong-accent, #C9A84C), #7C3AED);
}

.dd-pf-sc-profile {
    flex-shrink: 0;
    text-align: center;
}
.dd-pf-sc-avatar {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
    border-radius: 18px;
    border: 2px solid #F59E0B30;
    margin-bottom: 6px;
}
.dd-pf-sc-badge {
    display: inline-block;
    background: var(--dingdong-primary);
    color: #fff;
    font-size: 0.68rem;
    font-weight: 800;
    padding: 2px 10px;
    border-radius: 8px;
    letter-spacing: 0.5px;
}

.dd-pf-sc-info {
    flex: 1;
    min-width: 0;
}
.dd-pf-sc-name {
    margin: 0 0 4px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dingdong-text, #2C3039) !important;
    line-height: 1.2;
}
.dd-pf-sc-affil {
    font-size: 0.82rem;
    color: var(--dingdong-text-light) !important;
    margin-bottom: 4px;
}
.dd-pf-sc-bio {
    font-size: 0.85rem;
    color: var(--dingdong-text, #2C3039) !important;
    margin: 0 0 6px;
    line-height: 1.4;
}
.dd-pf-sc-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}
.dd-pf-sc-tag {
    padding: 2px 10px;
    background: var(--dingdong-primary-light, #FFF1F1);
    color: var(--dingdong-primary) !important;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
}

.dd-pf-sc-stats {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}
.dd-pf-sc-stat {
    display: flex;
    align-items: baseline;
    gap: 3px;
    padding: 4px 12px;
    background: var(--dingdong-bg-alt, #F8FAFC);
    border-radius: 8px;
    white-space: nowrap;
}
.dd-pf-sc-streak {
    background: #FEF3C7 !important;
}
.dd-pf-sc-stat-num {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--dingdong-primary) !important;
}
.dd-pf-sc-stat-label {
    font-size: 0.72rem;
    color: var(--dingdong-text-light) !important;
    font-weight: 600;
}

@media (max-width: 768px) {
    .dd-pf-student-card {
        flex-direction: column;
        text-align: center;
        padding: 20px 16px;
    }
    .dd-pf-sc-stats {
        flex-direction: row;
        justify-content: center;
    }
    .dd-pf-sc-tags { justify-content: center; }
}

/* ═══════════════════════════════════════════
   v7.8.0 — 포트폴리오 섹션 넘버링 & 목표 스타일
   ═══════════════════════════════════════════ */

/* 섹션 헤더 (01~05 넘버링) */
.dd-pf-section {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin: 24px 0 14px;
    padding-bottom: 10px;
    border-bottom: 2px dotted var(--dingdong-border);
}
.dd-pf-section:first-child { margin-top: 0; }

.dd-pf-section-num {
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -2px;
    flex-shrink: 0;
    font-family: 'Inter', 'Pretendard', sans-serif;
}

.dd-pf-section-head {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-top: 6px;
}

.dd-pf-section-tag {
    display: inline-block;
    padding: 3px 14px;
    border-radius: 8px;
    font-size: 0.92rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.dd-pf-section-sub {
    font-size: 0.8rem;
    color: var(--dingdong-text-light);
    font-weight: 400;
}

/* 단기 목표 아이템 */
.dd-pf-goal-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 8px;
    border-radius: 8px;
    transition: background 0.15s;
    margin-bottom: 2px;
}
.dd-pf-goal-item:hover {
    background: rgba(0,0,0,0.03);
}
.dd-pf-goal-done .dd-pf-goal-text {
    text-decoration: line-through;
    color: var(--dingdong-text-light) !important;
}
.dd-pf-goal-check {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    line-height: 1;
    flex-shrink: 0;
}
.dd-pf-goal-text {
    flex: 1;
    font-size: 0.88rem;
    color: var(--dingdong-text) !important;
    line-height: 1.4;
}
.dd-pf-goal-del {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--dingdong-text-light);
    padding: 2px 4px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.15s;
    flex-shrink: 0;
}
.dd-pf-goal-item:hover .dd-pf-goal-del {
    opacity: 1;
}
.dd-pf-goal-del:hover {
    color: #EF4444;
    background: rgba(239,68,68,0.08);
}

/* 장기 목표 타임라인 */
.dd-pf-long-timeline {
    position: relative;
    padding-left: 16px;
}
.dd-pf-long-timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: linear-gradient(180deg, var(--dingdong-primary), var(--dingdong-border));
    border-radius: 1px;
}
.dd-pf-long-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    position: relative;
}
.dd-pf-long-dot {
    position: absolute;
    left: -14px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 0 0 2px var(--dingdong-border);
    z-index: 1;
}
.dd-pf-long-body {
    flex: 1;
    min-width: 0;
}
.dd-pf-long-text {
    font-size: 0.88rem;
    color: var(--dingdong-text) !important;
    font-weight: 600;
    line-height: 1.4;
}
.dd-pf-long-achieved .dd-pf-long-text {
    text-decoration: line-through;
    color: var(--dingdong-text-light) !important;
}
.dd-pf-long-date {
    font-size: 0.75rem;
    color: var(--dingdong-text-light);
    margin-top: 2px;
}

/* 모바일: 목표 2열 → 1열 */
@media (max-width: 768px) {
    .dd-pf-section-num { font-size: 2rem; }
    .dd-pf-section { gap: 10px; margin: 16px 0 10px; }
    #dd-portfolio-capture > div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }
}

/* ═══════════════════════════════════════════
   v6.9.2 — 대시보드 텍스트 가독성 최종 강화 (Astra 테마 간섭 완전 차단)
   ═══════════════════════════════════════════ */

/* 대시보드 전역: 밝은 배경 위 어두운 텍스트 강제 */
.dd-dashboard-wrap .dd-main,
.dd-dashboard-wrap .dd-main h2,
.dd-dashboard-wrap .dd-main h3,
.dd-dashboard-wrap .dd-main h4,
.dd-dashboard-wrap .dd-main p,
.dd-dashboard-wrap .dd-main span,
.dd-dashboard-wrap .dd-main div,
.dd-dashboard-wrap .dd-main label,
.dd-dashboard-wrap .dd-main small,
.dd-dashboard-wrap .dd-main td,
.dd-dashboard-wrap .dd-main th,
.dd-dashboard-wrap .dd-main li {
    color: var(--dingdong-text, #2C3039) !important;
}

/* 포트폴리오 히어로 내부: 밝은 텍스트 강제 */
.dd-pf-hero,
.dd-pf-hero *:not(.dd-pf-level-ring) {
    color: #fff !important;
}
.dd-pf-hero-name { text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.dd-pf-hero-bio { color: rgba(255,255,255,0.85) !important; text-shadow: 0 1px 4px rgba(0,0,0,0.2); }
.dd-pf-hero-goal { color: #F5E2A0 !important; text-shadow: 0 1px 4px rgba(0,0,0,0.2); }

/* KPI 스트립 값 */
.dd-pf-kpi-value { color: var(--dingdong-primary) !important; }
.dd-pf-kpi-label { color: var(--dingdong-text-light) !important; }

/* 성과 카드 내부 */
.dd-pf-card-nums strong { color: var(--dingdong-primary) !important; }
.dd-pf-card-body h4 { color: var(--dingdong-text) !important; }

/* 프로필 헤더: 밝은 텍스트 (이미 있지만 더 강력하게) */
.dd-profile-header,
.dd-profile-header h2,
.dd-profile-header p,
.dd-profile-header span,
.dd-profile-header div {
    color: #fff !important;
}
.dd-profile-header .dd-profile-meta { color: #CBD5E0 !important; }

/* stat-label 밝은 배경에서 */
.dd-main .dd-stat-label,
.dd-main .dd-stat-card .dd-stat-label { color: var(--dingdong-text-light, #718096) !important; }
.dd-main .dd-stat-num { color: var(--dingdong-primary) !important; }

/* 사이드바 텍스트 */
.dd-sidebar .dd-sidebar-item .dd-sidebar-label { color: var(--dingdong-text, #2C3039) !important; }
.dd-sidebar .dd-sidebar-item.active .dd-sidebar-label { color: var(--dingdong-primary) !important; }

/* ═══════════════════════════════════════════
   v6.9.3 — 게이미피케이션 시스템
   ═══════════════════════════════════════════ */

.dd-gf-header {
    background: var(--dingdong-glass);
    backdrop-filter: blur(var(--dingdong-glass-blur));
    -webkit-backdrop-filter: blur(var(--dingdong-glass-blur));
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 16px;
    padding: 20px 24px;
    margin-bottom: 16px;
    box-shadow: var(--dingdong-shadow);
}

.dd-gf-greeting h2 {
    font-size: 1.15rem !important;
    font-weight: 700;
    color: var(--dingdong-text) !important;
    margin-bottom: 16px !important;
}

.dd-gf-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

/* XP + 레벨 링 */
.dd-gf-xp-wrap {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1;
    min-width: 200px;
}

.dd-gf-level-ring {
    position: relative;
    width: 70px;
    height: 70px;
    flex-shrink: 0;
}

.dd-gf-level-ring svg {
    width: 100%;
    height: 100%;
}

.dd-gf-level-num {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--dingdong-primary) !important;
}

.dd-gf-xp-info {
    flex: 1;
}

.dd-gf-xp-total {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--dingdong-primary) !important;
}

.dd-gf-xp-next {
    font-size: 0.78rem;
    color: var(--dingdong-text-light) !important;
    margin-bottom: 6px;
}

.dd-gf-xp-bar {
    height: 6px;
    background: rgba(184,59,59,0.12);
    border-radius: 3px;
    overflow: hidden;
    max-width: 180px;
}

.dd-gf-xp-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--dingdong-primary), #FF8F5E);
    border-radius: 3px;
    transition: width 1s ease;
}

/* 연속 학습 */
.dd-gf-streak {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    background: rgba(251,146,60,0.08);
    border: 1px solid rgba(251,146,60,0.2);
    border-radius: 14px;
    flex-shrink: 0;
}

.dd-gf-streak-fire {
    font-size: 1.5rem;
    line-height: 1;
}

.dd-gf-streak-fire.active {
    animation: dd-fire-pulse 1.5s ease infinite;
}

@keyframes dd-fire-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.dd-gf-streak-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: #EA580C !important;
}

.dd-gf-streak-label {
    font-size: 0.78rem;
    color: var(--dingdong-text-light) !important;
}

/* 일일 목표 */
.dd-gf-daily {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.dd-gf-daily-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--dingdong-text-light) !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dd-gf-daily-ring {
    position: relative;
    width: 56px;
    height: 56px;
}

.dd-gf-daily-ring svg {
    width: 100%;
    height: 100%;
}

.dd-gf-daily-num {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.82rem;
    font-weight: 800;
    color: var(--dingdong-success) !important;
}

.dd-gf-daily-done {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--dingdong-success) !important;
}

/* 차트 행 */
.dd-gf-chart-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 14px;
    margin-bottom: 16px;
}

.dd-gf-chart-card,
.dd-gf-xp-breakdown {
    padding: 18px !important;
    min-height: 200px;
}

.dd-gf-chart-card canvas,
.dd-gf-xp-breakdown canvas {
    max-height: 180px;
}

/* 퀵 링크 개선 */
.dd-quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
    margin-top: 8px;
}

.dd-quick-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 18px 12px;
    background: var(--dingdong-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 14px;
    text-decoration: none !important;
    color: var(--dingdong-text) !important;
    font-size: 0.88rem;
    font-weight: 600;
    transition: all var(--dingdong-transition-spring);
}

.dd-quick-link:hover {
    transform: translateY(-4px);
    box-shadow: var(--dingdong-shadow-md);
    border-color: var(--dingdong-primary);
}

.dd-quick-icon {
    font-size: 1.8rem;
    line-height: 1;
    transition: transform var(--dingdong-transition-spring);
}

.dd-quick-link:hover .dd-quick-icon {
    transform: scale(1.25) rotate(-5deg);
}

/* 모바일 게이미피케이션 */
@media (max-width: 768px) {
    .dd-gf-stats {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .dd-gf-xp-wrap { min-width: auto; }
    .dd-gf-streak { justify-content: center; }
    .dd-gf-chart-row {
        grid-template-columns: 1fr;
    }
    .dd-quick-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* v6.9.3 — 코스 카드 원형 프로그레스 */
.dd-course-card-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: auto;
}

.dd-course-ring {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
}

.dd-course-card-progress span {
    font-size: 12px !important;
    color: var(--dingdong-text-light) !important;
}

/* ═══════════════════════════════════════════
   v6.9.4 — Quyl 스타일 컬러풀 대시보드
   ═══════════════════════════════════════════ */

/* 4색 통계 카드 */
.dd-dash-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.dd-dash-stat-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 16px;
    border-radius: 16px;
    text-decoration: none !important;
    color: #3D3D4E !important;
    transition: all var(--dingdong-transition-spring);
    position: relative;
    overflow: hidden;
}

.dd-dash-stat-card::after {
    content: '';
    position: absolute;
    top: -30px; right: -20px;
    width: 80px; height: 80px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    pointer-events: none;
}

.dd-dash-stat-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.dd-dsc-lessons { background: linear-gradient(135deg, #A8C0E0, #C6DEF1); }
.dd-dsc-quiz    { background: linear-gradient(135deg, #E8D490, #FAEDCB); }
.dd-dsc-vocab   { background: linear-gradient(135deg, #8FC5AD, #C9E4DE); }
.dd-dsc-review  { background: linear-gradient(135deg, #E0A0C0, #F2C6DE); }

.dd-dsc-lessons .dd-dsc-value,
.dd-dsc-lessons .dd-dsc-ring-num { color: #2D4A6F !important; }
.dd-dsc-quiz .dd-dsc-value,
.dd-dsc-quiz .dd-dsc-ring-num { color: #6B5A20 !important; }
.dd-dsc-vocab .dd-dsc-value,
.dd-dsc-vocab .dd-dsc-ring-num { color: #1F5C3E !important; }
.dd-dsc-review .dd-dsc-value,
.dd-dsc-review .dd-dsc-ring-num { color: #6B2040 !important; }

.dd-dsc-lessons .dd-dsc-label { color: rgba(45,74,111,0.7) !important; }
.dd-dsc-quiz .dd-dsc-label { color: rgba(107,90,32,0.7) !important; }
.dd-dsc-vocab .dd-dsc-label { color: rgba(31,92,62,0.7) !important; }
.dd-dsc-review .dd-dsc-label { color: rgba(107,32,64,0.7) !important; }

.dd-dsc-ring {
    position: relative;
    width: 52px; height: 52px;
    flex-shrink: 0;
}

.dd-dsc-ring svg { width: 100%; height: 100%; }

.dd-dsc-ring-num {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%,-50%);
    font-size: 0.85rem;
    font-weight: 800;
    color: #fff !important;
}

.dd-dsc-text { min-width: 0; }
.dd-dsc-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff !important;
    line-height: 1.2;
}
.dd-dsc-label {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.85) !important;
    margin-top: 2px;
}

/* 코스 가로 스크롤 */
.dd-dash-courses-scroll {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 8px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.dd-dash-courses-scroll::-webkit-scrollbar {
    height: 4px;
}
.dd-dash-courses-scroll::-webkit-scrollbar-track {
    background: var(--dingdong-border);
    border-radius: 2px;
}
.dd-dash-courses-scroll::-webkit-scrollbar-thumb {
    background: var(--dingdong-primary);
    border-radius: 2px;
}

.dd-dash-course-item {
    display: flex;
    gap: 12px;
    min-width: 260px;
    max-width: 300px;
    padding: 12px;
    background: rgba(248,250,252,0.8);
    border: 1px solid var(--dingdong-border);
    border-radius: 12px;
    text-decoration: none !important;
    color: var(--dingdong-text) !important;
    transition: all var(--dingdong-transition);
    scroll-snap-align: start;
    flex-shrink: 0;
}

.dd-dash-course-item:hover {
    border-color: var(--dingdong-primary);
    box-shadow: var(--dingdong-shadow-md);
    transform: translateY(-2px);
}

.dd-dash-course-thumb {
    width: 56px; height: 56px;
    border-radius: 10px;
    overflow: hidden;
    background: #F0F0F0;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.dd-dash-course-thumb img {
    width: 100%; height: 100%; object-fit: cover;
}

.dd-dash-course-info {
    flex: 1;
    min-width: 0;
}

/* 최근 활동 리스트 */
.dd-dash-recent {
    display: flex;
    flex-direction: column;
}

.dd-dash-recent-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--dingdong-border);
    transition: background var(--dingdong-transition);
}

.dd-dash-recent-item:last-child { border-bottom: none; }
.dd-dash-recent-item:hover { background: rgba(184,59,59,0.02); margin: 0 -12px; padding-left: 12px; padding-right: 12px; border-radius: 8px; }

.dd-dash-recent-icon {
    width: 36px; height: 36px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    background: var(--dingdong-primary-light);
    border-radius: 10px;
    flex-shrink: 0;
}

.dd-dash-recent-body {
    flex: 1;
    min-width: 0;
}

.dd-dash-recent-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--dingdong-primary) !important;
    letter-spacing: 0.3px;
}

.dd-dash-recent-title {
    display: block;
    font-size: 0.88rem;
    color: var(--dingdong-text) !important;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dd-dash-recent-ago {
    font-size: 0.75rem;
    color: var(--dingdong-text-light) !important;
    white-space: nowrap;
    flex-shrink: 0;
}

/* 모바일 대시보드 */
@media (max-width: 768px) {
    .dd-dash-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    .dd-dash-stat-card {
        padding: 14px 12px;
        gap: 10px;
    }
    .dd-dsc-value { font-size: 1.1rem; }
    .dd-dash-course-item { min-width: 220px; }
}

@media (max-width: 480px) {
    .dd-dash-stats {
        grid-template-columns: 1fr 1fr;
    }
}

/* ═══════════════════════════════════════════
   v6.9.5 — 레벨업 모달 + 뱃지 시스템
   ═══════════════════════════════════════════ */

/* 레벨업 오버레이 */
.dd-levelup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100001;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: dd-lu-fade-in 0.3s ease;
}

@keyframes dd-lu-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.dd-levelup-modal {
    background: linear-gradient(135deg, #5B4B85 0%, #6B5B95 30%, #8E7CC3 100%);
    border-radius: 24px;
    padding: 40px 36px;
    text-align: center;
    color: #fff;
    max-width: 380px;
    width: 90%;
    position: relative;
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(0,0,0,0.5);
    animation: dd-lu-pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid rgba(255,255,255,0.1);
}

@keyframes dd-lu-pop {
    from { opacity: 0; transform: scale(0.7) translateY(30px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.dd-levelup-confetti {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(255,215,0,0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(184,59,59,0.2) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(99,102,241,0.2) 0%, transparent 50%);
    pointer-events: none;
    animation: dd-confetti-pulse 2s ease infinite;
}

@keyframes dd-confetti-pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

.dd-levelup-icon {
    font-size: 4rem;
    line-height: 1;
    margin-bottom: 12px;
    animation: dd-lu-bounce 0.6s ease 0.3s both;
    position: relative;
    z-index: 1;
}

@keyframes dd-lu-bounce {
    0% { transform: scale(0); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

.dd-levelup-title {
    font-size: 1.8rem;
    font-weight: 900;
    margin: 0 0 16px;
    background: linear-gradient(135deg, #FFD700, #FFA500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

.dd-levelup-level {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.dd-levelup-from {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.5) !important;
    font-weight: 700;
}

.dd-levelup-arrow {
    font-size: 1.5rem;
    color: #FFD700 !important;
    animation: dd-lu-arrow 1s ease infinite;
}

@keyframes dd-lu-arrow {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(6px); }
}

.dd-levelup-to {
    font-size: 2rem;
    font-weight: 900;
    color: #FFD700 !important;
    text-shadow: 0 0 20px rgba(255,215,0,0.5);
}

.dd-levelup-msg {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.85) !important;
    line-height: 1.6;
    margin: 0 0 8px;
    position: relative;
    z-index: 1;
}

.dd-levelup-xp {
    font-size: 0.85rem;
    color: var(--dingdong-accent) !important;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

/* 뱃지 토스트 */
.dd-badge-toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 100000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 340px;
}

.dd-badge-toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: var(--dingdong-card-bg);
    border: 1px solid var(--dingdong-accent);
    border-radius: 14px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    animation: dd-badge-slide-in 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes dd-badge-slide-in {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

.dd-badge-toast-icon {
    font-size: 2rem;
    line-height: 1;
    flex-shrink: 0;
}

.dd-badge-toast-info { min-width: 0; }

.dd-badge-toast-label {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--dingdong-accent) !important;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.dd-badge-toast-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dingdong-text) !important;
}

.dd-badge-toast-desc {
    font-size: 0.8rem;
    color: var(--dingdong-text-light) !important;
}

/* 뱃지 그리드 (포트폴리오) */
.dd-badge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
}

.dd-badge-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 8px;
    border-radius: 14px;
    text-align: center;
    transition: all var(--dingdong-transition);
    cursor: default;
}

.dd-badge-earned {
    background: linear-gradient(135deg, rgba(201,168,76,0.08), rgba(255,215,0,0.06));
    border: 1px solid rgba(201,168,76,0.2);
}

.dd-badge-earned:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(201,168,76,0.15);
}

.dd-badge-locked {
    background: rgba(0,0,0,0.02);
    border: 1px dashed var(--dingdong-border);
    opacity: 0.5;
}

.dd-badge-icon {
    font-size: 2rem;
    line-height: 1;
}

.dd-badge-earned .dd-badge-icon {
    filter: drop-shadow(0 2px 4px rgba(201,168,76,0.3));
}

.dd-badge-name {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--dingdong-text) !important;
    line-height: 1.2;
}

.dd-badge-locked .dd-badge-name {
    color: var(--dingdong-text-light) !important;
}

@media (max-width: 768px) {
    .dd-badge-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: 8px;
    }
    .dd-badge-item { padding: 10px 6px; }
    .dd-badge-icon { font-size: 1.6rem; }
    .dd-badge-toast-container { right: 10px; left: 10px; max-width: none; }
    .dd-levelup-modal { padding: 28px 24px; }
}

/* ═══════════════════════════════════════════
   v6.9.6 — 블록 네비게이터 + 블록 선택 모달
   ═══════════════════════════════════════════ */

/* ── 학습자 블록 네비게이터 ── */
.dd-block-nav {
    display: flex;
    gap: 8px;
    padding: 12px 0;
    margin-bottom: 16px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.dd-block-nav::-webkit-scrollbar { height: 0; }

.dd-block-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 16px;
    min-width: 72px;
    background: var(--dingdong-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--dingdong-glass-border);
    border-radius: 12px;
    text-decoration: none !important;
    color: var(--dingdong-text) !important;
    font-size: 0.78rem;
    font-weight: 600;
    transition: all var(--dingdong-transition-spring);
    scroll-snap-align: start;
    flex-shrink: 0;
    cursor: pointer;
}

.dd-block-nav-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--dingdong-shadow-md);
    border-color: var(--dingdong-primary);
}

.dd-block-nav-item.dd-bni-active {
    background: linear-gradient(135deg, var(--dingdong-primary), #D44E4E);
    color: #fff !important;
    border-color: var(--dingdong-primary);
    box-shadow: 0 4px 14px rgba(184,59,59,0.25);
}

.dd-block-nav-item.dd-bni-active .dd-bni-label {
    color: #fff !important;
}

.dd-bni-icon {
    font-size: 1.3rem;
    line-height: 1;
    transition: transform var(--dingdong-transition-spring);
}

.dd-block-nav-item:hover .dd-bni-icon {
    transform: scale(1.2);
}

.dd-bni-label {
    font-size: 0.72rem;
    white-space: nowrap;
    color: var(--dingdong-text) !important;
}

.dd-bni-complete {
    margin-left: auto;
}

.dd-bni-complete .dd-bni-icon {
    color: var(--dingdong-success);
}

/* ── 교수자 FAB (플로팅 버튼) ── */
.dd-fab-add {
    position: fixed;
    bottom: 100px;
    right: 28px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--dingdong-accent), #D6A756);
    border: none;
    cursor: pointer;
    z-index: 99998;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(201,168,76,0.4);
    transition: all var(--dingdong-transition-spring);
    animation: dd-fab-pulse 2s ease infinite;
}

.dd-fab-add:hover {
    transform: scale(1.12) rotate(90deg);
    box-shadow: 0 6px 28px rgba(201,168,76,0.5);
}

@keyframes dd-fab-pulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(201,168,76,0.4); }
    50% { box-shadow: 0 4px 20px rgba(201,168,76,0.4), 0 0 0 8px rgba(201,168,76,0.1); }
}

.dd-fab-icon {
    font-size: 1.5rem;
    line-height: 1;
    transition: transform 0.3s ease;
}

/* ── 블록 선택 모달 ── */
.dd-block-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 100002;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: dd-modal-fade-in 0.2s ease;
}

.dd-block-modal {
    background: var(--dingdong-card-bg);
    border-radius: 24px;
    max-width: 600px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 0;
    box-shadow: 0 24px 80px rgba(0,0,0,0.2);
    animation: dd-modal-slide-up 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.dd-block-modal-header {
    padding: 24px 28px 16px;
    position: relative;
}

.dd-block-modal-header h3 {
    margin: 0 0 4px;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--dingdong-text) !important;
}

.dd-block-modal-header p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--dingdong-text-light) !important;
}

.dd-block-modal-close {
    position: absolute;
    top: 16px; right: 16px;
    background: none; border: none;
    font-size: 1.2rem; cursor: pointer;
    width: 36px; height: 36px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--dingdong-text-light) !important;
    transition: background var(--dingdong-transition);
}

.dd-block-modal-close:hover {
    background: rgba(0,0,0,0.05);
}

.dd-block-modal-section {
    padding: 0 28px 20px;
}

.dd-block-modal-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--dingdong-text-light) !important;
    margin-bottom: 12px;
    padding-top: 4px;
}

.dd-block-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
}

.dd-block-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 18px 10px 14px;
    background: var(--dingdong-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 2px solid var(--dingdong-glass-border);
    border-radius: 16px;
    cursor: pointer;
    transition: all var(--dingdong-transition-spring);
    position: relative;
    text-align: center;
}

.dd-block-btn:hover {
    border-color: var(--dingdong-primary);
    transform: translateY(-4px);
    box-shadow: var(--dingdong-shadow-md);
    background: var(--dingdong-primary-light);
}

.dd-block-btn:active {
    transform: translateY(-1px);
}

.dd-block-btn-icon {
    font-size: 2rem;
    line-height: 1;
    transition: transform var(--dingdong-transition-spring);
}

.dd-block-btn:hover .dd-block-btn-icon {
    transform: scale(1.15) rotate(-5deg);
}

.dd-block-btn-name {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--dingdong-text) !important;
    line-height: 1.2;
}

.dd-block-btn-desc {
    font-size: 0.72rem;
    color: var(--dingdong-text-light) !important;
    line-height: 1.3;
}

.dd-block-btn-badge {
    position: absolute;
    top: 6px; right: 6px;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 8px;
    background: rgba(45,139,85,0.1);
    color: #2D8B55 !important;
    border: 1px solid rgba(45,139,85,0.2);
}

/* 모바일 */
@media (max-width: 768px) {
    .dd-block-nav {
        padding: 8px 0;
        gap: 6px;
    }
    .dd-block-nav-item {
        padding: 8px 12px;
        min-width: 60px;
    }
    .dd-bni-icon { font-size: 1.1rem; }
    .dd-fab-add {
        bottom: 80px;
        right: 16px;
        width: 48px;
        height: 48px;
    }
    .dd-block-modal {
        border-radius: 20px 20px 0 0;
        max-height: 90vh;
        align-self: flex-end;
    }
    .dd-block-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    .dd-block-btn {
        padding: 14px 8px 10px;
    }
    .dd-block-btn-desc { display: none; }
}

/* ═══════════════════════════════════════════
   v6.9.7 — AI 도구 그리드 (대시보드)
   ═══════════════════════════════════════════ */
.dd-dash-tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.dd-dash-tool-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 18px 10px;
    background: var(--dt-color, #F2C6DE);
    border-radius: 14px;
    text-decoration: none !important;
    color: var(--dingdong-text) !important;
    transition: all var(--dingdong-transition-spring);
    border: 1px solid rgba(0,0,0,0.04);
}

.dd-dash-tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--dingdong-shadow-md);
}

.dd-dash-tool-icon {
    font-size: 1.8rem;
    line-height: 1;
    transition: transform var(--dingdong-transition-spring);
}

.dd-dash-tool-card:hover .dd-dash-tool-icon {
    transform: scale(1.2) rotate(-5deg);
}

.dd-dash-tool-name {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--dingdong-text) !important;
}

@media (max-width: 768px) {
    .dd-dash-tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ═══ 파스텔 톤 오버라이드 (전역) ═══ */

/* 프로그레스 바 파스텔 */
.dingdong-progress-fill {
    background: linear-gradient(90deg, #C75B7A, #E8A0B8, #D4A84B) !important;
}

/* 뱃지 파스텔 */
.dingdong-badge {
    background: var(--dingdong-secondary) !important;
}

/* 포트폴리오 성과 카드 바 파스텔 */
.dd-pf-card-tutor .dd-pf-card-fill { background: linear-gradient(90deg, #C75B7A, #E8A0B8) !important; }
.dd-pf-card-writing .dd-pf-card-fill { background: linear-gradient(90deg, #D4A84B, #FAEDCB) !important; }
.dd-pf-card-roleplay .dd-pf-card-fill { background: linear-gradient(90deg, #9B7EC8, #DBCDF0) !important; }
.dd-pf-card-quiz .dd-pf-card-fill { background: linear-gradient(90deg, #6BAF8D, #C9E4DE) !important; }

/* XP 관련 파스텔 */
.dd-gf-xp-fill {
    background: linear-gradient(90deg, #C75B7A, #E8A0B8) !important;
}

/* 뱃지 획득 카드 파스텔 */
.dd-badge-earned {
    background: linear-gradient(135deg, rgba(250,237,203,0.5), rgba(219,205,240,0.3)) !important;
    border-color: rgba(212,168,75,0.25) !important;
}

/* 타임라인 도트 파스텔 */
.dd-pf-timeline::before {
    background: linear-gradient(180deg, #C75B7A, #DBCDF0, var(--dingdong-border)) !important;
}

/* ═══════════════════════════════════════════
   v6.9.8 — 투두리스트
   ═══════════════════════════════════════════ */
.dd-todo-card {
    border-top: 3px solid var(--pastel-lavender, #DBCDF0) !important;
}

.dd-todo-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.dd-todo-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--todo-color, #F5F5F5);
    border-radius: 10px;
    transition: all var(--dingdong-transition);
    border: 1px solid rgba(0,0,0,0.03);
}

.dd-todo-item:hover {
    transform: translateX(4px);
    box-shadow: var(--dingdong-shadow);
}

.dd-todo-icon {
    font-size: 1.1rem;
    line-height: 1;
    flex-shrink: 0;
}

.dd-todo-text {
    flex: 1;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--dingdong-text) !important;
    text-decoration: none !important;
    line-height: 1.4;
    min-width: 0;
}

.dd-todo-text:hover {
    color: var(--dingdong-primary) !important;
}

.dd-todo-ai-badge {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 8px;
    background: rgba(199,91,122,0.08);
    color: var(--dingdong-primary) !important;
    white-space: nowrap;
    flex-shrink: 0;
}

.dd-todo-go {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0,0,0,0.04);
    color: var(--dingdong-text-light) !important;
    text-decoration: none !important;
    font-size: 0.85rem;
    flex-shrink: 0;
    transition: all var(--dingdong-transition);
}

.dd-todo-go:hover {
    background: var(--dingdong-primary);
    color: #fff !important;
}

/* v6.9.10: Todo 체크/삭제 */
.dd-todo-check {
    width: 22px; height: 22px; border: 2px solid var(--dingdong-primary);
    border-radius: 6px; background: #fff; cursor: pointer; font-size: 14px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; transition: all 0.15s; padding: 0; line-height: 1;
}
.dd-todo-check:hover { background: #F2C6DE; }
.dd-todo-done .dd-todo-check { background: var(--dingdong-primary); color: #fff; border-color: var(--dingdong-primary); }
.dd-todo-done .dd-todo-text { text-decoration: line-through; opacity: 0.5; }
.dd-todo-del {
    width: 24px; height: 24px; border: none; background: none; cursor: pointer;
    color: var(--dingdong-text-light); font-size: 12px; padding: 0;
    opacity: 0; transition: opacity 0.2s; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center; border-radius: 50%;
}
.dd-todo-item:hover .dd-todo-del { opacity: 0.6; }
.dd-todo-del:hover { opacity: 1 !important; color: var(--dingdong-error); background: rgba(229,62,62,0.06); }

/* v6.9.10: Badge 클릭 커서 */
.dd-badge-clickable { cursor: pointer; transition: transform 0.15s; }
.dd-badge-clickable:hover { transform: scale(1.08); }

@media (max-width: 768px) {
    .dd-todo-ai-badge { display: none; }
}

/* ═══════════════════════════════════════════════
   v7.4.0: 텍스트 크기 전반 확대 + 퀴즈 다양화 + 영상 관리
   ═══════════════════════════════════════════════ */

/* --- 전반적 텍스트 크기 확대 --- */
.dd-lesson p, .dd-lesson li { font-size: 16px; line-height: 1.8; }
.dd-lesson .dingdong-card h2 { font-size: 20px; }
.dd-lesson .dingdong-card p { font-size: 15.5px; }
.dd-grammar-ko { font-size: 15px !important; }
.dd-grammar-head h4 { font-size: 18px !important; }
.dd-grammar-ex { font-size: 15px; }
.dd-grammar-warn { font-size: 15px !important; }
.dd-quiz-qt { font-size: 16px !important; }
.dd-quiz-opt { font-size: 15px !important; }
.dd-embed-desc { font-size: 15px !important; }
.dd-vocab-row .dd-vocab-word { font-size: 18px; }
.dd-vocab-row .dd-vocab-meaning { font-size: 15px; }
.dd-vocab-row .dd-vocab-pinyin { font-size: 14px; }
.dd-sc-zh { font-size: 17px !important; }
.dd-sc-ko { font-size: 14.5px !important; }
.dd-sc-grammar-explain { font-size: 15.5px !important; }
.dd-flash-word { font-size: 26px !important; }
.dd-flash-meaning { font-size: 16px !important; }
.dd-flash-pinyin { font-size: 15px !important; }
.dd-sc-culture-zh { font-size: 16px !important; }
.dd-sc-culture-ko { font-size: 15px !important; }

/* --- 퀴즈 유형 배지 --- */
.dd-quiz-type-badge {
    display: inline-block; font-size: 11px; font-weight: 700;
    padding: 2px 8px; border-radius: 10px; margin-right: 6px;
    background: var(--dingdong-primary); color: #fff; vertical-align: middle;
}
.dd-quiz-q[data-type="填空题"] .dd-quiz-type-badge { background: #6B5B95; }
.dd-quiz-q[data-type="判断题"] .dd-quiz-type-badge { background: #48BB78; }
.dd-quiz-q[data-type="语序排列题"] .dd-quiz-type-badge { background: #ED8936; }

/* --- 빈칸 채우기 --- */
.dd-quiz-fill { margin: 8px 0 4px; }
.dd-quiz-fill-input { font-size: 16px !important; padding: 10px 14px !important; }

/* --- 어순 배열 칩 --- */
.dd-order-chip {
    font-size: 15px !important; padding: 6px 14px !important; border-radius: 20px !important;
    cursor: pointer; transition: all 0.15s;
}
.dd-order-chip.selected { background: var(--dingdong-primary); color: #fff; border-color: var(--dingdong-primary); }
.dd-order-selected { background: #F7FAFC; }

/* --- 영상 임베드 관리 --- */
.dd-embed-actions { opacity: 0.7; transition: opacity 0.2s; }
.dd-embed-item:hover .dd-embed-actions { opacity: 1; }

/* --- 숏카드 병음 표시 (HSK1~4) --- */
.dd-sc-line-pinyin { font-size: 13px; color: var(--dingdong-text-muted); margin-left: 4px; }
.dd-sc-key-pinyin { font-size: 12px; color: var(--dingdong-text-light); }

/* ══════════════════════════════════════
   🎓 이수관리 시스템 (v7.4.1)
══════════════════════════════════════ */

/* 이수 완료 코스 카드 */
.dd-course-card-completed {
    position: relative;
    border: 2px solid var(--dingdong-success, #16a34a) !important;
    opacity: .92;
    text-decoration: none !important;
}
.dd-course-card-completed:hover { opacity: 1; }
.dd-completion-badge {
    background: var(--dingdong-success, #16a34a) !important;
    color: #fff !important;
}
.dd-completion-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 13px;
    color: var(--dingdong-success, #16a34a);
    margin-top: 8px;
    font-weight: 600;
}

/* 교수자 분석 탭 — 이수율 stat 카드 */
.dd-stat-card {
    border: 1px solid var(--dingdong-border, #e5e7eb);
    border-radius: 12px;
    padding: 16px 20px;
    text-align: center;
    background: var(--dingdong-card-bg, #fff);
    transition: box-shadow .15s;
}
.dd-stat-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,.08); }

/* 인터랙티브 콘텐츠 섹션 — 코스 상세 페이지에서도 적용 */
#dd-interactive-section h2 { margin-bottom: 4px; }

/* ═══ v7.5.0: 애니메이션 & 이수관리 ═══ */

/* 오답 쉐이크 애니메이션 */
@keyframes dd-shake {
    0%, 100% { transform: translateX(0); }
    15% { transform: translateX(-6px); }
    30% { transform: translateX(5px); }
    45% { transform: translateX(-4px); }
    60% { transform: translateX(3px); }
    75% { transform: translateX(-2px); }
}

/* 정답 팝 애니메이션 */
@keyframes dd-pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* 이수증 인쇄 스타일 */
@media print {
    .dd-dashboard-wrap, .dd-sidebar, .dd-profile-header,
    .dd-modal-close, .dingdong-btn { display: none !important; }
    .dd-modal-overlay { position: static !important; background: none !important; }
    .dd-modal { box-shadow: none !important; max-width: 100% !important; }
}

/* 성적 분포 차트 바 호버 */
.dd-analytics-table th {
    font-size: 12px;
    font-weight: 600;
    color: var(--dingdong-text-light, #6B7280);
    text-align: left;
    padding: 8px 6px;
    border-bottom: 2px solid var(--dingdong-border, #E5E7EB);
    white-space: nowrap;
}
.dd-analytics-table td {
    padding: 8px 6px;
    border-bottom: 1px solid var(--dingdong-border, #E5E7EB);
    font-size: 13px;
    vertical-align: middle;
}
.dd-analytics-table tr:hover { background: rgba(0,0,0,0.02); }

/* ═══ v7.5.0: 문화 콘텐츠 비교 섹션 시각 개선 ═══ */
.dd-culture-section-kr {
    border-left: 4px solid #3B82F6;
    padding-left: 16px;
    background: rgba(59, 130, 246, 0.04);
    border-radius: 0 12px 12px 0;
    padding: 16px;
    margin-bottom: 12px;
}
.dd-culture-section-cn {
    border-left: 4px solid #DC2626;
    padding-left: 16px;
    background: rgba(220, 38, 38, 0.04);
    border-radius: 0 12px 12px 0;
    padding: 16px;
    margin-bottom: 12px;
}
.dd-compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.dd-compare-table th {
    background: var(--dingdong-bg-alt, #F8FAFC);
    padding: 10px 8px;
    text-align: center;
    font-weight: 600;
    border-bottom: 2px solid var(--dingdong-border);
}
.dd-compare-table td {
    padding: 10px 8px;
    border-bottom: 1px solid var(--dingdong-border);
    vertical-align: top;
}
.dd-compare-note {
    font-size: 12px;
    color: #6366F1;
    background: rgba(99, 102, 241, 0.04);
    font-style: italic;
}
.dd-insight {
    background: linear-gradient(135deg, #FEF9E7, #FFF);
    border: 1px solid #E8D5A3;
    border-radius: 12px;
    padding: 16px;
}

/* ═══════════════════════════════════════════
   자료실 (shortcode-resources) 스타일 v7.7.2
═══════════════════════════════════════════ */
.dd-resources-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 16px 40px;
}
.dd-res-header {
    text-align: center;
    padding: 36px 0 28px;
}
.dd-res-header h1 {
    font-size: 2rem;
    font-weight: 800;
    margin: 0 0 8px;
    color: var(--dingdong-text, #2C3039);
}
.dd-res-header p {
    color: var(--dingdong-text-light, #6B7280);
    margin: 0;
    font-size: 1rem;
}

/* 업로드 패널 */
.dd-res-upload-panel {
    background: #fff;
    border: 1px solid var(--dingdong-border, #E5E7EB);
    border-radius: 14px;
    margin-bottom: 20px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.dd-res-upload-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    cursor: pointer;
    font-weight: 700;
    font-size: 1rem;
    color: var(--dingdong-text, #2C3039);
    user-select: none;
    background: linear-gradient(135deg, #FFF5F7, #FFF);
    transition: background 0.2s;
}
.dd-res-upload-toggle:hover { background: linear-gradient(135deg, #FFEDF1, #FFF5F7); }
.dd-toggle-arrow { font-size: 0.9rem; color: var(--dingdong-primary, #C75B7A); transition: transform 0.2s; }
.dd-res-upload-panel.open .dd-toggle-arrow { transform: rotate(180deg); }
.dd-res-upload-body { display: none; padding: 20px; border-top: 1px solid var(--dingdong-border, #E5E7EB); }
.dd-res-upload-panel.open .dd-res-upload-body { display: block; }
.dd-upload-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
@media (max-width: 600px) { .dd-upload-grid { grid-template-columns: 1fr; } }

/* 필터 */
.dd-res-filters { margin-bottom: 20px; }
.dd-res-filter-form {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    background: #fff;
    border: 1px solid var(--dingdong-border, #E5E7EB);
    border-radius: 14px;
    padding: 14px 16px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.dd-res-filter-form .dingdong-input { flex: 0 0 auto; }
.dd-res-filter-form input[type="text"] { flex: 1 1 160px; }

/* 자료 목록 */
.dd-res-list { display: flex; flex-direction: column; gap: 10px; }
.dd-res-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: #fff;
    border: 1px solid var(--dingdong-border, #E5E7EB);
    border-radius: 14px;
    padding: 16px 18px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    transition: box-shadow 0.2s, transform 0.15s;
}
.dd-res-item:hover { box-shadow: 0 4px 14px rgba(0,0,0,0.08); transform: translateY(-1px); }
.dd-res-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, #FFF0F4, #FCE4ED);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}
.dd-res-info { flex: 1; min-width: 0; }
.dd-res-title {
    font-weight: 700;
    font-size: 0.97rem;
    color: var(--dingdong-text, #2C3039);
    margin-bottom: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.dd-res-desc {
    font-size: 0.84rem;
    color: var(--dingdong-text-light, #6B7280);
    margin-bottom: 5px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}
.dd-res-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    font-size: 0.78rem;
    color: var(--dingdong-text-light, #6B7280);
}
.dd-res-type-badge {
    background: var(--dingdong-primary, #C75B7A);
    color: #fff;
    padding: 1px 7px;
    border-radius: 6px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.dd-res-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
}
.dd-res-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--dingdong-text-light, #6B7280);
    background: #fff;
    border-radius: 14px;
    border: 1px dashed var(--dingdong-border, #E5E7EB);
}
.dd-res-pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 24px;
    flex-wrap: wrap;
}
.dd-dropzone {
    border: 2px dashed var(--dingdong-primary, #C75B7A);
    border-radius: 12px;
    padding: 28px;
    text-align: center;
    cursor: pointer;
    background: rgba(199,91,122,0.03);
    transition: all 0.2s;
}
.dd-dropzone:hover { background: rgba(199,91,122,0.07); }
.dd-dropzone-icon { font-size: 2.2rem; margin-bottom: 8px; }
.dd-dropzone-text { font-weight: 600; color: var(--dingdong-text, #2C3039); margin-bottom: 4px; }
.dd-dropzone-hint { font-size: 0.82rem; color: var(--dingdong-text-light, #6B7280); }
.dd-dropzone-selected { margin-top: 10px; font-weight: 600; color: var(--dingdong-primary, #C75B7A); }
.dd-upload-options { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 12px; }
.dd-checkbox { display: flex; align-items: center; gap: 6px; font-size: 0.88rem; cursor: pointer; }

/* 자료실 필터 전용 select — appearance 충돌 방지 */
.dd-res-select {
    height: 40px;
    padding: 0 36px 0 12px;
    border: 1.5px solid var(--dingdong-border, #E5E7EB);
    border-radius: 10px;
    background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.8' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 12px center;
    appearance: none;
    -webkit-appearance: none;
    font-size: 0.9rem;
    color: var(--dingdong-text, #2C3039);
    cursor: pointer;
    min-width: 130px;
    flex-shrink: 0;
    transition: border-color 0.2s;
}
.dd-res-select:focus { outline: none; border-color: var(--dingdong-primary, #C75B7A); }
.dd-res-search-input {
    flex: 1;
    min-width: 160px;
    height: 40px;
    padding: 0 14px;
    border: 1.5px solid var(--dingdong-border, #E5E7EB);
    border-radius: 10px;
    background: #fff;
    font-size: 0.9rem;
    color: var(--dingdong-text, #2C3039);
    transition: border-color 0.2s;
}
.dd-res-search-input:focus { outline: none; border-color: var(--dingdong-primary, #C75B7A); }