/* ═══════════════════════════════════════════════════════════
   GIÁO ÁN ĐẶC BIỆT — Special Curriculum Styles
   ═══════════════════════════════════════════════════════════ */

/* ── Page Shell ─────────────────────────────────────────── */
.sc-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: linear-gradient(135deg, #0d1117 0%, #161b22 50%, #0d1117 100%);
    color: #e6edf3;
    font-family: 'Inter', 'Segoe UI', sans-serif;
}

.sc-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: rgba(22, 27, 34, 0.95);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    flex-wrap: wrap;
}

.sc-back-btn {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    color: #e6edf3;
    padding: 6px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.2s;
    white-space: nowrap;
}
.sc-back-btn:hover { background: rgba(255,255,255,0.12); }

.sc-header-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.15rem;
    font-weight: 700;
    flex: 1;
    background: linear-gradient(135deg, #f9e45b, #ffd700);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.sc-crown { font-size: 1.3rem; -webkit-text-fill-color: initial; }

.sc-user-stats {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}
.sc-stat-pill {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid;
}
.sc-stat--passed { color: #2ecc71; border-color: rgba(46,204,113,0.4); background: rgba(46,204,113,0.08); }
.sc-stat--failed { color: #e74c3c; border-color: rgba(231,76,60,0.4); background: rgba(231,76,60,0.08); }
.sc-stat--star   { color: #f9e45b; border-color: rgba(249,228,91,0.4); background: rgba(249,228,91,0.08); }

.sc-content {
    flex: 1;
    padding: 20px;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
}

/* ── Loading / Error / No Access ─────────────────────────── */
.sc-loading, .sc-error, .sc-empty {
    text-align: center;
    padding: 60px 20px;
    color: rgba(255,255,255,0.5);
    font-size: 1rem;
}
.sc-error { color: #e74c3c; }

.sc-no-access {
    text-align: center;
    padding: 80px 30px;
    max-width: 420px;
    margin: 0 auto;
}
.sc-no-access-icon { font-size: 4rem; margin-bottom: 16px; filter: drop-shadow(0 0 20px rgba(255,165,0,0.4)); }
.sc-no-access-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #f9e45b, #ffd700);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.sc-no-access-msg {
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.7);
    padding: 16px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
}

/* ── Sections ────────────────────────────────────────────── */
.sc-sections { display: flex; flex-direction: column; gap: 12px; }

.sc-section {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color 0.2s;
}
.sc-section:hover { border-color: rgba(249,228,91,0.25); }
.sc-section--complete { border-color: rgba(46,204,113,0.3); }

.sc-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    cursor: pointer;
    background: rgba(255,255,255,0.02);
    transition: background 0.2s;
    gap: 12px;
}
.sc-section-header:hover { background: rgba(255,255,255,0.05); }

.sc-section-name { font-weight: 700; font-size: 0.95rem; }
.sc-section-elo  { font-size: 0.75rem; color: rgba(255,255,255,0.5); margin-top: 2px; }

.sc-section-right { display: flex; align-items: center; gap: 12px; }

.sc-section-progress { display: flex; align-items: center; gap: 8px; }
.sc-section-progress-bar {
    width: 80px; height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: hidden;
}
.sc-section-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #2ecc71, #27ae60);
    border-radius: 3px;
    transition: width 0.4s ease;
}
.sc-section-progress-label { font-size: 0.75rem; color: rgba(255,255,255,0.5); white-space: nowrap; }
.sc-section-chevron { font-size: 0.75rem; color: rgba(255,255,255,0.4); transition: transform 0.2s; }

.sc-lesson-list {
    border-top: 1px solid rgba(255,255,255,0.06);
    overflow: hidden;
    max-height: 2000px;
    transition: max-height 0.3s ease;
}
.sc-lesson-list.sc-collapsed { max-height: 0; border-top: none; }

/* ── Lesson Row ──────────────────────────────────────────── */
.sc-lesson {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    transition: background 0.15s;
    position: relative;
}
.sc-lesson:last-child { border-bottom: none; }
.sc-lesson--open:hover { background: rgba(255,255,255,0.04); }
.sc-lesson--locked { opacity: 0.45; }
.sc-lesson--exam {
    background: rgba(249,228,91,0.04);
    border-top: 1px solid rgba(249,228,91,0.12);
}

.sc-lesson-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255,255,255,0.07);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    color: rgba(255,255,255,0.6);
}

.sc-lesson-info { flex: 1; min-width: 0; }
.sc-lesson-title { font-size: 0.88rem; font-weight: 600; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sc-lesson-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.sc-type-badge {
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.68rem;
    font-weight: 600;
    background: rgba(109,213,250,0.12);
    color: #6dd5fa;
    border: 1px solid rgba(109,213,250,0.2);
}
.sc-exam-badge {
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.68rem;
    font-weight: 700;
    background: rgba(249,228,91,0.12);
    color: #f9e45b;
    border: 1px solid rgba(249,228,91,0.25);
    margin-left: 6px;
}
.sc-has-video { font-size: 0.7rem; color: #e74c3c; }
.sc-time { font-size: 0.7rem; color: rgba(255,255,255,0.4); }
.sc-best-score { font-size: 0.7rem; color: #2ecc71; font-weight: 600; }

.sc-lesson-grade {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 10px;
    white-space: nowrap;
    flex-shrink: 0;
}
.sc-lock-icon { font-size: 0.9rem; flex-shrink: 0; }

/* ── Lesson Page ─────────────────────────────────────────── */
.sc-lesson-page { display: flex; flex-direction: column; }

.sc-lesson-page-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.sc-lesson-page-title { flex: 1; font-size: 0.95rem; line-height: 1.4; }
.sc-lesson-page-grade { font-weight: 700; font-size: 0.85rem; }

.sc-lesson-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding-bottom: 8px;
    flex-wrap: wrap;
}
.sc-tab {
    padding: 8px 16px;
    border-radius: 8px 8px 0 0;
    border: 1px solid rgba(255,255,255,0.1);
    border-bottom: none;
    background: rgba(255,255,255,0.04);
    color: rgba(255,255,255,0.6);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s;
}
.sc-tab--active {
    background: rgba(249,228,91,0.12);
    color: #f9e45b;
    border-color: rgba(249,228,91,0.3);
}

.sc-tab-panel.hidden { display: none; }

/* ── Video ───────────────────────────────────────────────── */
.sc-video-wrap { border-radius: 12px; overflow: hidden; margin-bottom: 16px; aspect-ratio: 16/9; }
.sc-video-frame { width: 100%; height: 100%; border: none; }
.sc-theory-note {
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    padding: 12px;
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
}

/* ── Exercise ────────────────────────────────────────────── */
.sc-exercise-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}
.sc-score-thresholds { display: flex; gap: 8px; flex-wrap: wrap; }
.sc-thresh {
    padding: 4px 10px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 700;
    border: 1px solid;
}
.sc-thresh--dat    { color: #2ecc71; border-color: rgba(46,204,113,0.4); background: rgba(46,204,113,0.08); }
.sc-thresh--gioi   { color: #6dd5fa; border-color: rgba(109,213,250,0.4); background: rgba(109,213,250,0.08); }
.sc-thresh--star   { color: #f9e45b; border-color: rgba(249,228,91,0.4); background: rgba(249,228,91,0.08); }

.sc-timer {
    font-size: 1.1rem;
    font-weight: 800;
    padding: 6px 16px;
    border-radius: 20px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    font-feature-settings: 'tnum';
    transition: color 0.3s;
}

.sc-no-puzzle {
    text-align: center;
    padding: 40px;
    color: rgba(255,255,255,0.4);
    font-size: 0.9rem;
}

/* ── Complete Popup ──────────────────────────────────────── */
.sc-complete-popup {
    background: rgba(22,27,34,0.98);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 14px;
    padding: 20px;
    text-align: center;
    margin-bottom: 16px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}
.sc-complete-grade { font-size: 1.8rem; font-weight: 800; margin-bottom: 8px; }
.sc-complete-score { font-size: 1rem; color: rgba(255,255,255,0.7); margin-bottom: 8px; }
.sc-complete-msg   { font-size: 0.9rem; margin-bottom: 12px; }
.sc-unlocked-notice {
    font-size: 0.85rem;
    padding: 8px 12px;
    background: rgba(46,204,113,0.1);
    border: 1px solid rgba(46,204,113,0.3);
    border-radius: 8px;
    color: #2ecc71;
    margin-bottom: 12px;
}

/* ── Result Panel ────────────────────────────────────────── */
.sc-result-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    padding: 24px;
    text-align: center;
}
.sc-result-grade { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.sc-result-score { font-size: 1.2rem; font-weight: 700; color: rgba(255,255,255,0.8); margin-bottom: 16px; }
.sc-result-thresholds { display: flex; flex-direction: column; gap: 8px; max-width: 300px; margin: 0 auto; }
.sc-result-row { padding: 8px 16px; border-radius: 8px; font-size: 0.85rem; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08); color: rgba(255,255,255,0.5); }
.sc-result-row--met { background: rgba(46,204,113,0.1); border-color: rgba(46,204,113,0.3); color: #2ecc71; font-weight: 700; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 600px) {
    .sc-content { padding: 12px; }
    .sc-section-header { padding: 12px; }
    .sc-lesson { padding: 10px 12px; }
    .sc-lesson-title { font-size: 0.82rem; }
    .sc-section-progress-bar { width: 50px; }
    .sc-header-title { font-size: 0.95rem; }
}

/* -- Admin Top-level Tabs --- */
.sc-tabs { display: flex; gap: 4px; padding: 14px 20px 0; border-bottom: 2px solid rgba(255,255,255,0.08); margin: -20px -20px 20px; background: rgba(255,255,255,0.01); overflow-x: auto; }
.sc-tabs .sc-tab { border-radius: 10px 10px 0 0; border-bottom: 2px solid transparent; margin-bottom: -2px; font-size: 0.88rem; padding: 9px 20px; white-space: nowrap; }
.sc-tabs .sc-tab--active { background: rgba(249,228,91,0.10); color: #f9e45b; border-color: rgba(249,228,91,0.5); border-bottom-color: #f9e45b; }
.sc-admin-stats-wrap { display: flex; flex-direction: column; gap: 16px; }
.sc-admin-stats-toolbar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.sc-stat-search { flex: 1; min-width: 180px; padding: 9px 14px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.12); background: rgba(255,255,255,0.05); color: #e6edf3; font-size: 0.88rem; outline: none; transition: border-color 0.2s; }
.sc-stat-search:focus { border-color: rgba(249,228,91,0.5); }
.sc-stat-search::placeholder { color: rgba(255,255,255,0.35); }
.sc-stat-total-badge { padding: 6px 14px; border-radius: 20px; background: rgba(249,228,91,0.1); border: 1px solid rgba(249,228,91,0.25); color: #f9e45b; font-size: 0.8rem; font-weight: 700; white-space: nowrap; }
.sc-table-wrap { overflow-x: auto; border-radius: 12px; border: 1px solid rgba(255,255,255,0.08); }
.sc-stats-table { width: 100%; border-collapse: collapse; font-size: 0.87rem; }
.sc-th { padding: 12px 16px; text-align: left; font-size: 0.75rem; font-weight: 700; color: rgba(255,255,255,0.45); text-transform: uppercase; letter-spacing: 0.06em; background: rgba(255,255,255,0.03); border-bottom: 1px solid rgba(255,255,255,0.08); white-space: nowrap; }
.sc-stat-row { border-bottom: 1px solid rgba(255,255,255,0.05); transition: background 0.15s; }
.sc-stat-row:hover { background: rgba(255,255,255,0.04); }
.sc-stat-row:last-child { border-bottom: none; }
.sc-stat-td { padding: 12px 16px; vertical-align: middle; }
.sc-stat-rank { color: rgba(255,255,255,0.3); font-size: 0.8rem; font-weight: 700; width: 36px; }
.sc-stat-name { min-width: 140px; }
.sc-stat-username { font-weight: 700; font-size: 0.9rem; color: #e6edf3; }
.sc-stat-uname-sub { font-size: 0.72rem; color: rgba(255,255,255,0.4); margin-top: 2px; }
.sc-stat-progress { min-width: 200px; display: flex; align-items: center; gap: 10px; }
.sc-mini-bar-wrap { flex: 1; height: 6px; background: rgba(255,255,255,0.08); border-radius: 3px; overflow: hidden; min-width: 80px; }
.sc-mini-bar { height: 100%; border-radius: 3px; transition: width 0.4s ease; }
.sc-stat-num { font-weight: 700; font-size: 0.85rem; white-space: nowrap; }
@media (max-width: 700px) { .sc-tabs { padding: 10px 12px 0; margin: -12px -12px 16px; } .sc-th:nth-child(7), .sc-stat-td:nth-child(7) { display: none; } .sc-stat-progress { min-width: 120px; } .sc-mini-bar-wrap { min-width: 50px; } }

.sc-result-best-label { font-size: 0.78rem; color: rgba(255,255,255,0.45); letter-spacing: 0.05em; text-transform: uppercase; font-weight: 600; margin-bottom: 4px; margin-top: 8px; }

.sc-section-blocked-notice { margin: 10px 0; padding: 12px 14px; background: rgba(249,228,91,0.07); border: 1px solid rgba(249,228,91,0.28); border-radius: 10px; font-size: 0.84rem; text-align: left; } .sc-blocked-title { font-weight: 700; color: #f9e45b; display: block; margin-bottom: 8px; } .sc-blocked-stats { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 6px; } .sc-blocked-stat { font-weight: 600; } .sc-blocked-stat.met { color: #2ecc71; } .sc-blocked-stat.unmet { color: #e74c3c; } .sc-blocked-hint { color: rgba(255,255,255,0.45); font-size: 0.76rem; }