/**
 * Collection Detail Page Styles
 * ==============================
 */

/* Collection Header */
.collection-header {
    position: relative;
    min-height: 450px;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
}

.collection-header-bg {
    position: absolute;
    inset: 0;
    z-index: var(--z-below);
}

.collection-header-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center 30%;
    filter: blur(0);
    transform: scale(1.05);
}

.collection-header-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(13, 11, 9, 0.4) 30%,
        rgba(13, 11, 9, 0.8) 60%,
        var(--bg-primary) 100%
    );
}

[data-theme="light"] .collection-header-gradient {
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(250, 246, 240, 0.4) 30%,
        rgba(250, 246, 240, 0.85) 60%,
        var(--bg-primary) 100%
    );
}

/* Collection Header Content */
.collection-header-content {
    position: relative;
    z-index: var(--z-raised);
    padding: var(--space-8);
    width: 100%;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-8);
    align-items: end;
}

.collection-info {
    max-width: 700px;
}

/* Back Button */
.back-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    margin-bottom: var(--space-4);
    background: rgba(0, 0, 0, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    color: #fff;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.back-button--floating {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    z-index: 20;
    margin-bottom: 0;
}

.back-button:hover {
    background: rgba(212, 175, 125, 0.15);
    border-color: rgba(212, 175, 125, 0.30);
    color: var(--accent-primary);
    transform: translateX(-2px);
}

.back-button svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2.5;
}

[data-theme="light"] .back-button {
    background: rgba(255, 255, 255, 0.65);
    border-color: rgba(0, 0, 0, 0.15);
    color: var(--text-primary);
}

[data-theme="light"] .back-button:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(212, 175, 125, 0.35);
}

/* Collection Title */
.collection-title {
    font-size: var(--text-5xl);
    font-weight: 800;
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tighter);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.collection-title-arabic {
    font-family: var(--font-arabic);
    font-size: var(--text-2xl);
    color: var(--accent-primary);
    direction: rtl;
    margin-bottom: var(--space-4);
}

/* Collection Meta */
.collection-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.collection-meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.collection-meta-item svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    opacity: 0.7;
}

.collection-meta-divider {
    width: 4px;
    height: 4px;
    background: var(--text-muted);
    border-radius: var(--radius-full);
}

/* Level Badge */
.level-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
}

.level-indicator.level-1 {
    background: var(--success-soft);
    color: var(--success);
}

.level-indicator.level-2 {
    background: var(--warning-soft);
    color: var(--warning);
}

.level-indicator.level-3 {
    background: var(--danger-soft);
    color: var(--danger);
}

/* Collection Description */
.collection-description {
    font-size: var(--text-md);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
    margin-bottom: var(--space-3);
}

.collection-description.truncated {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.collection-description.expanded {
    display: block;
    -webkit-line-clamp: unset;
}

.description-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 0;
    margin-bottom: var(--space-5);
    background: none;
    border: none;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--accent-primary);
    cursor: pointer;
    transition: opacity var(--duration-fast) var(--ease-default);
}

.description-toggle:hover {
    opacity: 0.8;
}

.description-toggle svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    transition: transform var(--duration-fast) var(--ease-default);
}

.description-toggle.expanded svg {
    transform: rotate(180deg);
}

/* Collection Actions */
.collection-actions {
    display: flex;
    gap: var(--space-3);
}

/* Progress Ring (Header) */
.collection-progress-ring {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-5);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    backdrop-filter: blur(10px);
    min-width: 160px;
}

.progress-circle {
    position: relative;
    width: 100px;
    height: 100px;
}

.progress-circle svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-circle-bg {
    fill: none;
    stroke: var(--border-default);
    stroke-width: 8;
}

.progress-circle-fill {
    fill: none;
    stroke: var(--accent-primary);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset var(--duration-slow) var(--ease-default);
}

.progress-circle-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.progress-value {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

.progress-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.progress-status {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
}

/* Collection Body */
.collection-body {
    padding: var(--space-8);
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: var(--space-8);
}

/* Seasons & Episodes List */
.seasons-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* Season Card */
.season-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.season-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-default);
}

.season-header:hover {
    background: var(--bg-card-hover);
}

.season-header-left {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.season-number {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    border-radius: var(--radius-lg);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--accent-primary);
}

.season-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.season-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.season-title-arabic {
    font-family: var(--font-arabic);
    font-size: var(--text-base);
    color: var(--accent-primary);
    direction: rtl;
}

.season-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* Season Quiz Indicator */
.season-quiz-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 2px var(--space-2);
    margin-left: var(--space-2);
    background: var(--warning-soft);
    color: var(--warning);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
}

.season-quiz-indicator svg {
    width: 12px;
    height: 12px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.season-header-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.season-progress {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-1);
}

.season-progress-text {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.season-progress-bar {
    width: 100px;
    height: 4px;
    background: var(--progress-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.season-progress-fill {
    height: 100%;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
    transition: width var(--duration-normal) var(--ease-default);
}

.season-toggle {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    transition: all var(--duration-fast) var(--ease-default);
}

.season-toggle svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    transition: transform var(--duration-normal) var(--ease-default);
}

.season-card.expanded .season-toggle svg {
    transform: rotate(180deg);
}

/* Episodes List */
.episodes-list {
    display: none;
    border-top: 1px solid var(--border-subtle);
}

.season-card.expanded .episodes-list {
    display: block;
}

/* Episode Item */
.episode-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-subtle);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-default);
}

.episode-item:last-child {
    border-bottom: none;
}

.episode-item:hover {
    background: var(--bg-card-hover);
}

.episode-item.episode-highlight {
    background: rgba(212, 175, 125, 0.15);
    box-shadow: inset 3px 0 0 var(--accent-primary);
    animation: episodePulse 1.5s ease-in-out infinite;
}

@keyframes episodePulse {
    0%, 100% {
        background: rgba(212, 175, 125, 0.10);
    }
    50% {
        background: rgba(212, 175, 125, 0.25);
    }
}

.episode-item.completed {
    opacity: 0.7;
}

.episode-item.current {
    background: var(--accent-softer);
    border-left: 3px solid var(--accent-primary);
}

/* Episode Number/Status */
.episode-status {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    flex-shrink: 0;
}

.episode-status.pending {
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
}

.episode-status.completed {
    background: var(--success-soft);
    color: var(--success);
}

.episode-status.current {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.episode-status.quiz {
    background: var(--warning-soft);
    color: var(--warning);
}

.episode-status svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* Episode Info */
.episode-info {
    flex: 1;
    min-width: 0;
}

.episode-title {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.episode-title-arabic {
    font-family: var(--font-arabic);
    font-size: var(--text-sm);
    color: var(--accent-primary);
    direction: rtl;
    display: inline-block;
    margin-left: var(--space-2);
}

.episode-summary {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* Episode Progress Ring (per-episode mini radar, replaces status number) */
.episode-progress-ring {
    position: relative;
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.episode-progress-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.episode-progress-ring .progress-ring-bg {
    fill: none;
    stroke: var(--progress-bg);
    stroke-width: 2.5;
}

.episode-progress-ring .progress-ring-fill {
    fill: none;
    stroke: var(--accent-primary);
    stroke-width: 2.5;
    stroke-linecap: round;
    transition: stroke-dashoffset var(--duration-normal) var(--ease-default);
}

.episode-ring-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    font-weight: 700;
    color: var(--accent-primary);
}

/* Episode Meta */
.episode-meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

.episode-duration {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.episode-badges {
    display: flex;
    gap: var(--space-2);
}

.episode-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
}

.episode-badge.quiz-badge {
    background: var(--warning-soft);
    color: var(--warning);
}

.episode-badge svg {
    width: 12px;
    height: 12px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* Episode Type Label (for quiz-only episodes) */
.episode-type-label {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    margin-right: var(--space-2);
    background: var(--warning-soft);
    color: var(--warning);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Quiz Label in meta */
.episode-quiz-label {
    font-size: var(--text-sm);
    color: var(--warning);
    font-weight: 500;
}

/* Quiz-only episode styling */
.episode-item.quiz-only {
    background: var(--warning-soft);
    border-left: 3px solid var(--warning);
}

.episode-item.quiz-only:hover {
    background: rgba(var(--warning-rgb, 217, 119, 6), 0.15);
}

.episode-item.quiz-only .episode-play {
    background: var(--warning-soft);
    color: var(--warning);
}

/* Episode Play Button */
.episode-play {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    border-radius: var(--radius-full);
    color: var(--accent-primary);
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--duration-fast) var(--ease-bounce);
}

.episode-item:hover .episode-play {
    opacity: 1;
    transform: scale(1);
}

.episode-play svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
    stroke: none;
    margin-left: 2px;
}

/* Quiz play button */
.episode-play.quiz-play {
    background: var(--warning-soft);
    color: var(--warning);
}

.episode-play.quiz-play svg {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    margin-left: 0;
}

/* Quiz score badge in episode list */
.quiz-score-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
    white-space: nowrap;
}

.quiz-score-badge.passed {
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
}

.quiz-score-badge.failed {
    background: var(--warning-soft);
    color: var(--warning);
}

/* Quiz-only completed state */
.episode-item.quiz-only.completed {
    border-left-color: #4ade80;
}

.episode-item.quiz-only.completed .episode-status.quiz {
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
}

/* Episode Favorite Button */
.episode-fav-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
    opacity: 0;
    transform: scale(0.8);
    flex-shrink: 0;
    padding: 0;
}

.episode-item:hover .episode-fav-btn {
    opacity: 1;
    transform: scale(1);
}

/* Always visible when active (favorited) */
.episode-fav-btn.active {
    opacity: 1;
    transform: scale(1);
    color: #ef4444;
}

.episode-fav-btn:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
    transform: scale(1.15) !important;
}

.episode-fav-btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
}

.episode-fav-btn.active svg {
    fill: currentColor;
    stroke: none;
}

/* Pulse animation on toggle */
.episode-fav-btn.animate-pulse {
    animation: episodeFavPulse 0.4s ease;
}

@keyframes episodeFavPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* Sidebar Info */
.collection-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

/* Info Card */
.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
}

.info-card-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.info-card-title svg {
    width: 18px;
    height: 18px;
    stroke: var(--accent-primary);
    fill: none;
    stroke-width: 2;
}

/* Objectives List */
.objectives-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.objective-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

.objective-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success-soft);
    border-radius: var(--radius-full);
    flex-shrink: 0;
    margin-top: 2px;
}

.objective-icon svg {
    width: 12px;
    height: 12px;
    stroke: var(--success);
    fill: none;
    stroke-width: 2.5;
}

/* Prerequisites List */
.prerequisites-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.prerequisite-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.prerequisite-item::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

/* Prerequisite Collections (clickable modules) */
.prerequisite-collections {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.prerequisite-collection-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.prerequisite-collection-item:hover {
    background: var(--accent-soft);
    transform: translateX(4px);
}

.prerequisite-collection-title {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
}

/* Instructor/Author Card */
.instructor-card {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.instructor-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.instructor-avatar-img {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    flex-shrink: 0;
}

.instructor-info {
    flex: 1;
    min-width: 0;
}

.instructor-name {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
}

.instructor-name-arabic {
    font-family: var(--font-arabic);
    font-size: var(--text-sm);
    color: var(--accent-primary);
    direction: rtl;
}

.instructor-role {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-top: var(--space-1);
}

.instructor-bio {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-subtle);
}

.instructor-credentials {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-subtle);
}

.credential-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.credential-item svg {
    stroke: var(--success);
    fill: none;
    stroke-width: 2;
    flex-shrink: 0;
}

/* Tags */
.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tag-item {
    padding: var(--space-1) var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

/* Direct Episodes (collections without seasons) */
.direct-episodes-container {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.direct-episodes-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-subtle);
}

.direct-episodes-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.direct-episodes-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.direct-episodes-meta {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* Mini progress ring (radar style) */
.direct-episodes-progress-ring {
    position: relative;
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.direct-episodes-progress-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--progress-bg);
    stroke-width: 3;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--accent-primary);
    stroke-width: 3;
    stroke-linecap: round;
    transition: stroke-dashoffset var(--duration-slow) var(--ease-default);
}

.progress-ring-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    color: var(--accent-primary);
}

.direct-episodes-container .episodes-list {
    display: block;
    border-top: none;
}

/* Empty Episodes State */
.empty-episodes {
    padding: var(--space-10);
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 1100px) {
    .collection-body {
        grid-template-columns: 1fr;
    }

    .collection-sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }
}

@media (max-width: 768px) {

    /* ==============================================
       IMAGE BACKDROP
       ============================================== */

    .collection-header {
        min-height: auto;
        flex-direction: column;
        align-items: stretch;
    }

    .collection-header-bg {
        position: relative;
        height: 280px;
    }

    .collection-header-image {
        transform: scale(1);
    }

    .collection-header-gradient {
        background: linear-gradient(180deg,
            transparent 10%,
            rgba(13, 11, 9, 0.3) 50%,
            #0D0B09 100%
        );
    }

    [data-theme="light"] .collection-header-gradient {
        background: linear-gradient(180deg,
            transparent 10%,
            rgba(250, 246, 240, 0.3) 50%,
            #FAF6F0 100%
        );
    }

    /* Bouton retour flottant */
    .back-button--floating {
        display: inline-flex;
        padding: 10px 16px;
        font-size: 15px;
        background: rgba(0, 0, 0, 0.5);
        border-color: rgba(255, 255, 255, 0.15);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }


    /* ==============================================
       BOTTOM SHEET — Contenu qui overlap l'image
       ============================================== */

    .collection-header-content {
        position: relative;
        grid-template-columns: 1fr;
        padding: 28px 20px 20px;
        margin-top: -48px;
        background: #0D0B09;
        border-radius: 24px 24px 0 0;
        z-index: 5;
        box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.3);
    }

    [data-theme="light"] .collection-header-content {
        background: #FAF6F0;
        box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.08);
    }

    /* Poignée */
    .collection-header-content::before {
        content: '';
        position: absolute;
        top: 10px;
        left: 50%;
        transform: translateX(-50%);
        width: 40px;
        height: 5px;
        background: rgba(255, 255, 255, 0.2);
        border-radius: 999px;
    }

    [data-theme="light"] .collection-header-content::before {
        background: rgba(0, 0, 0, 0.12);
    }

    .collection-info {
        max-width: 100%;
        padding-top: 8px;
    }

    /* ==============================================
       HEADER — Texte lisible (px explicites)
       ============================================== */

    .collection-title {
        font-size: 26px;
        line-height: 1.2;
        margin-bottom: 4px;
    }

    .collection-title-arabic {
        font-size: 20px;
    }

    .collection-tagline {
        font-size: 15px;
    }

    .collection-meta {
        gap: 10px;
        margin-bottom: 12px;
    }

    .collection-meta-item {
        font-size: 14px;
    }

    .collection-meta-item svg {
        width: 16px;
        height: 16px;
    }

    .collection-description {
        font-size: 15px;
        line-height: 1.55;
        margin-bottom: 8px;
    }

    .description-toggle {
        font-size: 14px;
    }

    .collection-actions {
        gap: 10px;
    }

    .collection-actions .btn {
        flex: 1;
        justify-content: center;
        padding: 14px 16px;
        font-size: 15px;
        border-radius: 14px;
    }

    /* Progression inline */
    .collection-progress-ring {
        flex-direction: row;
        align-items: center;
        width: 100%;
        padding: 12px 16px;
        min-width: auto;
        gap: 14px;
        border-radius: 16px;
        background: #161310;
    }

    [data-theme="light"] .collection-progress-ring {
        background: #F0EBE3;
    }

    .progress-circle {
        width: 52px;
        height: 52px;
    }

    .progress-value {
        font-size: 16px;
    }

    .progress-label {
        font-size: 10px;
    }

    .progress-status {
        font-size: 14px;
        text-align: left;
    }

    /* ==============================================
       BODY — fond opaque continu
       ============================================== */

    .collection-body {
        padding: 0 16px 32px;
        background: #0D0B09;
    }

    [data-theme="light"] .collection-body {
        background: #FAF6F0;
    }

    .collection-sidebar {
        grid-template-columns: 1fr;
    }

    /* ==============================================
       SAISONS
       ============================================== */

    .season-card {
        background: #161310;
        border-color: rgba(255, 255, 255, 0.06);
        border-radius: 16px;
    }

    [data-theme="light"] .season-card {
        background: #FFFFFF;
        border-color: rgba(0, 0, 0, 0.06);
    }

    .season-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 16px;
    }

    .season-number {
        width: 44px;
        height: 44px;
        font-size: 18px;
        border-radius: 12px;
    }

    .season-title {
        font-size: 18px;
    }

    .season-meta {
        font-size: 14px;
    }

    .season-header-right {
        width: 100%;
        justify-content: space-between;
    }

    .season-progress-text {
        font-size: 13px;
    }

    .season-progress-bar {
        width: 100px;
        height: 5px;
    }

    /* ==============================================
       ÉPISODES DIRECTS — Plus de double scroll
       ============================================== */

    .direct-episodes-container {
        background: #161310;
        border-color: rgba(255, 255, 255, 0.06);
        border-radius: 16px;
    }

    [data-theme="light"] .direct-episodes-container {
        background: #FFFFFF;
        border-color: rgba(0, 0, 0, 0.06);
    }

    .direct-episodes-header {
        padding: 16px;
    }

    .direct-episodes-title {
        font-size: 18px;
    }

    .direct-episodes-meta {
        font-size: 14px;
    }

    /* ==============================================
       ÉPISODES — Titre pleine largeur, meta en dessous
       ============================================== */

    .episode-item {
        display: grid;
        grid-template-columns: 36px 1fr;
        grid-template-rows: auto auto;
        gap: 4px 10px;
        padding: 12px 16px;
        align-items: center;
    }

    .episode-status {
        grid-row: 1 / 3;
        width: 36px;
        height: 36px;
        font-size: 14px;
        border-radius: 10px;
        align-self: center;
    }

    .episode-status svg {
        width: 18px;
        height: 18px;
    }

    .episode-info {
        grid-column: 2;
        grid-row: 1;
        min-width: 0;
    }

    .episode-title {
        font-size: 15px;
        line-height: 1.3;
        margin-bottom: 0;
        white-space: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .episode-title::-webkit-scrollbar {
        display: none;
    }

    .episode-title-arabic {
        font-size: 14px;
    }

    .episode-summary {
        font-size: 13px;
        line-height: 1.3;
        display: none;
    }

    .episode-meta {
        grid-column: 2;
        grid-row: 2;
        justify-self: end;
        flex-shrink: 0;
    }

    .episode-play {
        display: none;
    }

    /* Favorite button always visible on mobile (no hover) */
    .episode-fav-btn {
        opacity: 1;
        transform: scale(1);
        width: 28px;
        height: 28px;
    }

    .episode-fav-btn svg {
        width: 16px;
        height: 16px;
    }

    .episode-duration {
        font-size: 12px;
    }

    .episode-progress-ring {
        grid-row: 1 / 3;
        width: 36px;
        height: 36px;
        align-self: center;
    }

    .episode-ring-text {
        font-size: 8px;
    }

    .episode-badge {
        font-size: 11px;
        padding: 3px 8px;
    }

    /* ==============================================
       SIDEBAR — Cartes opaques, lisibles
       ============================================== */

    .info-card {
        padding: 18px;
        background: #161310;
        border-color: rgba(255, 255, 255, 0.06);
    }

    [data-theme="light"] .info-card {
        background: #FFFFFF;
        border-color: rgba(0, 0, 0, 0.06);
    }

    .info-card-title {
        font-size: 16px;
        margin-bottom: 14px;
    }

    .objective-item {
        font-size: 15px;
        line-height: 1.5;
    }

    .prerequisite-item {
        font-size: 15px;
    }

    .prerequisite-collection-item {
        padding: 14px;
    }

    .prerequisite-collection-title {
        font-size: 15px;
    }

    .tag-item {
        font-size: 13px;
        padding: 6px 14px;
    }

    .instructor-name {
        font-size: 16px;
    }

    .instructor-role {
        font-size: 14px;
    }

    .instructor-bio {
        font-size: 15px;
        line-height: 1.5;
    }
}

/* =============================================
   DOCUMENTS ASSOCIÉS (Wiki) - Card in Sidebar
   ============================================= */

/* Clickable info card */
.info-card--clickable {
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-default);
}

.info-card--clickable:hover {
    border-color: var(--accent-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Documents card content */
.documents-card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-4) 0;
}

.documents-card-count {
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
    margin-bottom: var(--space-1);
}

.documents-card-label {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
}

.documents-card-action {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--accent-soft);
    color: var(--accent-primary);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--duration-fast) var(--ease-default);
}

.info-card--clickable:hover .documents-card-action {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.documents-card-action svg {
    width: 16px;
    height: 16px;
}

/* =============================================
   DOCUMENTS LIST MODAL
   ============================================= */

.documents-list-modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-default);
}

.documents-list-modal.active {
    opacity: 1;
    visibility: visible;
}

.documents-list-modal.hidden {
    opacity: 0;
    visibility: hidden;
}

.documents-list-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
}

.documents-list-modal__container {
    position: relative;
    width: 100%;
    height: 85vh;
    background: var(--bg-primary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    border: 1px solid var(--border-default);
    border-bottom: none;
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform var(--duration-normal) var(--ease-default);
}

.documents-list-modal.active .documents-list-modal__container {
    transform: translateY(0);
}

.documents-list-modal__handle {
    display: flex;
    justify-content: center;
    padding: var(--space-3) 0 var(--space-1);
    cursor: pointer;
}

.documents-list-modal__handle-bar {
    width: 40px;
    height: 4px;
    background: var(--border-default);
    border-radius: var(--radius-full);
}

.documents-list-modal__header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-2) var(--space-5) var(--space-3);
    border-bottom: 1px solid var(--border-subtle);
}

.documents-list-modal__title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--accent-primary);
    margin: 0;
    flex: 1;
}

.documents-list-modal__title svg {
    width: 24px;
    height: 24px;
}

.documents-list-modal__count {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
}

.documents-list-modal__close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.documents-list-modal__close:hover {
    background: var(--danger-soft);
    border-color: var(--danger);
    color: var(--danger);
}

.documents-list-modal__close svg {
    width: 20px;
    height: 20px;
}

.documents-list-modal__content {
    padding: var(--space-4);
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

/* Document Item - Like Episode Item */
.document-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-default);
}

.document-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-tertiary);
    transform: translateX(4px);
}

.document-item__number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    color: var(--accent-primary);
    font-weight: 700;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
}

.document-item__info {
    flex: 1;
    min-width: 0;
}

.document-item__title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-1) 0;
    line-height: var(--leading-snug);
}

.document-item:hover .document-item__title {
    color: var(--accent-primary);
}

.document-item__question {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin: 0;
    line-height: var(--leading-relaxed);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.document-item__action {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    transition: all var(--duration-fast) var(--ease-default);
}

.document-item:hover .document-item__action {
    color: var(--accent-primary);
    transform: scale(1.1);
}

.document-item__action svg {
    width: 22px;
    height: 22px;
}

/* =============================================
   PDF VIEWER BOTTOM SHEET
   ============================================= */

.pdf-viewer-sheet {
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-modal) + 1);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-default);
}

.pdf-viewer-sheet.active {
    opacity: 1;
    visibility: visible;
}

.pdf-viewer-sheet__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
}

.pdf-viewer-sheet__container {
    position: relative;
    width: 100%;
    height: 92vh;
    background: var(--bg-primary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    border: 1px solid var(--border-default);
    border-bottom: none;
    box-shadow: var(--shadow-2xl);
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform var(--duration-normal) var(--ease-default);
}

.pdf-viewer-sheet.active .pdf-viewer-sheet__container {
    transform: translateY(0);
}

.pdf-viewer-sheet__handle {
    display: flex;
    justify-content: center;
    padding: var(--space-3) 0 var(--space-1);
    cursor: pointer;
}

.pdf-viewer-sheet__handle-bar {
    width: 40px;
    height: 4px;
    background: var(--border-default);
    border-radius: var(--radius-full);
}

.pdf-viewer-sheet__header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-5) var(--space-3);
    border-bottom: 1px solid var(--border-subtle);
}

.pdf-viewer-sheet__title-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 0;
    color: var(--accent-primary);
}

.pdf-viewer-sheet__title {
    margin: 0;
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pdf-viewer-sheet__actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

.pdf-viewer-sheet__btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-default);
}

.pdf-viewer-sheet__btn:hover {
    background: var(--accent-soft);
    border-color: var(--accent-tertiary);
    color: var(--accent-primary);
}

.pdf-viewer-sheet__btn svg {
    width: 18px;
    height: 18px;
}

.pdf-viewer-sheet__nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.pdf-viewer-sheet__nav-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.pdf-viewer-sheet__nav-btn:hover {
    background: var(--accent-soft);
    color: var(--accent-primary);
}

.pdf-viewer-sheet__nav-btn svg {
    width: 18px;
    height: 18px;
}

.pdf-viewer-sheet__page-info {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 70px;
    text-align: center;
}

.pdf-viewer-sheet__body {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    justify-content: center;
    padding: var(--space-2);
    background: var(--bg-tertiary);
}

/* PDF viewer — scrollbar track border */
.pdf-viewer-sheet__body::-webkit-scrollbar-track {
    border-left: 1px solid var(--border-subtle);
}

.pdf-viewer-sheet__canvas {
    display: block;
    max-width: 100%;
    height: auto;
}

@media (max-width: 768px) {
    .pdf-viewer-sheet__container {
        height: 95vh;
    }

    .pdf-viewer-sheet__title {
        font-size: var(--text-sm);
    }

    .pdf-viewer-sheet__header {
        padding: var(--space-2) var(--space-3) var(--space-2);
    }
}

/* =============================================
   DOCUMENT DETAIL MODAL
   ============================================= */

.document-detail-modal {
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-modal) + 1);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-default);
}

.document-detail-modal.active {
    opacity: 1;
    visibility: visible;
}

.document-detail-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
}

.document-detail-modal__container {
    position: relative;
    width: 100%;
    height: 92vh;
    background: var(--bg-primary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    border: 1px solid var(--border-default);
    border-bottom: none;
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform var(--duration-normal) var(--ease-default);
}

.document-detail-modal.active .document-detail-modal__container {
    transform: translateY(0);
}

.document-detail-modal__handle {
    display: flex;
    justify-content: center;
    padding: var(--space-3) 0 var(--space-1);
    cursor: pointer;
}

.document-detail-modal__handle-bar {
    width: 40px;
    height: 4px;
    background: var(--border-default);
    border-radius: var(--radius-full);
}

.document-detail-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-5) var(--space-3);
    border-bottom: 1px solid var(--border-subtle);
}

.document-detail-modal__back {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.document-detail-modal__back:hover {
    border-color: var(--accent-tertiary);
    color: var(--accent-primary);
}

.document-detail-modal__back svg {
    width: 18px;
    height: 18px;
}

.document-detail-modal__close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.document-detail-modal__close:hover {
    background: var(--danger-soft);
    border-color: var(--danger);
    color: var(--danger);
}

.document-detail-modal__close svg {
    width: 18px;
    height: 18px;
}

.document-detail-modal__body {
    padding: var(--space-6);
    overflow-y: auto;
    flex: 1;
}

/* Document detail — scrollbar track border */
.document-detail-modal__body::-webkit-scrollbar-track {
    border-left: 1px solid var(--border-subtle);
}

.document-detail-modal__title {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--accent-primary);
    margin: 0 0 var(--space-4) 0;
    line-height: var(--leading-tight);
}

.document-detail-modal__question {
    padding: var(--space-4);
    background: var(--accent-soft);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--text-base);
    font-style: italic;
    margin-bottom: var(--space-6);
    border-left: 3px solid var(--accent-primary);
}

.document-detail-modal__content {
    color: var(--text-primary);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

.document-detail-modal__content p {
    margin: 0 0 var(--space-4) 0;
}

.document-detail-modal__content p:last-child {
    margin-bottom: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .documents-list-modal,
    .document-detail-modal {
        padding: var(--space-3);
    }

    .documents-list-modal__container,
    .document-detail-modal__container {
        max-height: 95vh;
    }

    .documents-list-modal__header {
        flex-wrap: wrap;
        padding: var(--space-4);
    }

    .documents-list-modal__title {
        font-size: var(--text-lg);
    }

    .document-item {
        padding: var(--space-3);
    }

    .document-item__number {
        width: 32px;
        height: 32px;
        font-size: var(--text-xs);
    }

    .document-detail-modal__body {
        padding: var(--space-4);
    }

    .document-detail-modal__title {
        font-size: var(--text-xl);
    }
}

/* =============================================
   DOCUMENTS & PDF - Light Mode
   ============================================= */

[data-theme="light"] .documents-list-modal__overlay,
[data-theme="light"] .document-detail-modal__overlay,
[data-theme="light"] .pdf-viewer-sheet__overlay {
    background: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .documents-list-modal__container,
[data-theme="light"] .document-detail-modal__container {
    background: #FFFFFF;
    border-color: rgba(139, 115, 85, 0.15);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .documents-list-modal__header {
    background: #FAF6F0;
    border-color: rgba(139, 115, 85, 0.1);
}

[data-theme="light"] .document-item {
    background: #FAF6F0;
    border-color: rgba(139, 115, 85, 0.1);
}

[data-theme="light"] .document-item:hover {
    background: #F5EFE6;
}

[data-theme="light"] .pdf-viewer-sheet__container {
    background: #FFFFFF;
    border-color: rgba(139, 115, 85, 0.15);
}

[data-theme="light"] .pdf-viewer-sheet__nav {
    background: #FAF6F0;
}

[data-theme="light"] .pdf-viewer-sheet__body {
    background: #F5EFE6;
}

[data-theme="light"] .document-detail-modal__body {
    background: #FFFFFF;
}

[data-theme="light"] .document-detail-modal__header {
    background: #FAF6F0;
    border-color: rgba(139, 115, 85, 0.1);
}

/* =============================================
   LOCKED COLLECTION OVERLAY
   ============================================= */

.collection-locked-overlay {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    background: linear-gradient(
        135deg,
        rgba(var(--accent-rgb, 196, 161, 95), 0.05) 0%,
        rgba(var(--accent-rgb, 196, 161, 95), 0.1) 100%
    );
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.collection-locked-card {
    max-width: 500px;
    text-align: center;
    padding: var(--space-8);
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-xl), 0 0 60px rgba(var(--accent-rgb, 196, 161, 95), 0.15);
}

.collection-locked-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-5);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--warning-soft);
    border-radius: var(--radius-full);
    color: var(--warning);
}

.collection-locked-icon svg {
    width: 40px;
    height: 40px;
}

.collection-locked-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-3) 0;
}

.collection-locked-description {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0 0 var(--space-6) 0;
}

.collection-locked-description strong {
    color: var(--accent-primary);
    font-weight: 600;
}

.collection-locked-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    align-items: center;
}

.collection-locked-actions .btn-primary {
    min-width: 220px;
    padding: var(--space-4) var(--space-6);
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--bg-primary);
    font-size: var(--text-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-default);
    box-shadow: 0 4px 15px rgba(var(--accent-rgb, 196, 161, 95), 0.3);
}

.collection-locked-actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(var(--accent-rgb, 196, 161, 95), 0.4);
}

.collection-locked-actions .btn-secondary {
    padding: var(--space-3) var(--space-5);
    background: transparent;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.collection-locked-actions .btn-secondary:hover {
    border-color: var(--accent-tertiary);
    color: var(--accent-primary);
}

/* Locked body state - blur and disable interactions */
/* Full width when no sidebar content */
.collection-body--full {
    grid-template-columns: 1fr;
}

.collection-body--full .collection-sidebar {
    display: none;
}

.collection-body--locked {
    position: relative;
    pointer-events: none;
    user-select: none;
}

.collection-body--locked::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(var(--bg-primary-rgb, 13, 11, 9), 0.7);
    backdrop-filter: blur(8px);
    z-index: 10;
    border-radius: var(--radius-xl);
}

.collection-body--locked .seasons-container,
.collection-body--locked .collection-sidebar {
    filter: blur(4px);
    opacity: 0.5;
}

/* Responsive for locked overlay */
@media (max-width: 768px) {
    .collection-locked-overlay {
        padding: var(--space-5);
    }

    .collection-locked-card {
        padding: var(--space-5);
    }

    .collection-locked-icon {
        width: 60px;
        height: 60px;
    }

    .collection-locked-icon svg {
        width: 30px;
        height: 30px;
    }

    .collection-locked-title {
        font-size: var(--text-xl);
    }

    .collection-locked-description {
        font-size: var(--text-sm);
    }

    .collection-locked-actions .btn-primary {
        min-width: 180px;
        padding: var(--space-3) var(--space-5);
        font-size: var(--text-sm);
    }
}

/* Coming Soon Episode */
.episode-item--coming-soon {
    opacity: 0.85;
    background: var(--bg-secondary);
}

.episode-item--coming-soon .episode-status {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.episode-item--coming-soon .episode-clock-icon {
    width: 18px;
    height: 18px;
}

.episode-title-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.episode-badge-coming-soon {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: linear-gradient(135deg, var(--accent-primary) 0%, #B8860B 100%);
    color: var(--bg-primary);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    border-radius: var(--radius-full);
    white-space: nowrap;
    text-transform: uppercase;
    box-shadow: 0 2px 8px rgba(212, 175, 125, 0.3);
}

.episode-badge-new {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    background: #e53e3e;
    color: #fff;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1px;
    border-radius: var(--radius-full);
    white-space: nowrap;
    text-transform: uppercase;
    box-shadow: 0 2px 8px rgba(229, 62, 62, 0.5);
    animation: episodeBadgePulse 1.5s ease-in-out infinite;
}

@keyframes episodeBadgePulse {
    0%, 100% { box-shadow: 0 2px 8px rgba(229, 62, 62, 0.4); }
    50% { box-shadow: 0 2px 14px rgba(255, 71, 87, 0.9), 0 0 20px rgba(255, 71, 87, 0.3); }
}

.episode-coming-soon-text {
    color: var(--text-tertiary);
    font-size: var(--text-sm);
    font-style: italic;
    margin: 0;
}

.episode-coming-soon-badge {
    padding: var(--space-1) var(--space-3);
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.episode-item--coming-soon:hover {
    opacity: 0.9;
}

/* =============================================
   QUIZ BOTTOM SHEET
   ============================================= */

.quiz-sheet {
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-modal) + 1);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-default);
}

.quiz-sheet.active {
    opacity: 1;
    visibility: visible;
}

.quiz-sheet__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
}

.quiz-sheet__container {
    position: relative;
    width: 100%;
    height: 92vh;
    background: var(--bg-primary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    border: 1px solid var(--border-default);
    border-bottom: none;
    box-shadow: var(--shadow-2xl);
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform var(--duration-normal) var(--ease-default);
}

.quiz-sheet.active .quiz-sheet__container {
    transform: translateY(0);
}

.quiz-sheet__handle {
    display: flex;
    justify-content: center;
    padding: var(--space-3) 0 var(--space-1);
    cursor: pointer;
}

.quiz-sheet__handle-bar {
    width: 40px;
    height: 4px;
    background: var(--border-default);
    border-radius: var(--radius-full);
}

.quiz-sheet__header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-5);
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
    min-height: 48px;
}

.quiz-sheet__back {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    cursor: pointer;
    flex-shrink: 0;
    transition: all var(--duration-fast) var(--ease-default);
}

.quiz-sheet__back:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.quiz-sheet__header-center {
    flex: 1;
    min-width: 0;
}

.quiz-sheet__header-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
    line-height: 1.3;
}

.quiz-sheet__header-sub {
    font-size: var(--text-xs);
    color: var(--accent-primary);
    display: block;
    line-height: 1.2;
}

.quiz-sheet__header-progress {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
}

.quiz-sheet__body {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: var(--space-6) var(--space-8);
}

.quiz-sheet__loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-12) 0;
    color: var(--text-secondary);
}

.quiz-sheet__progress-bar {
    width: 60px;
    height: 4px;
    background: var(--progress-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.quiz-sheet__progress-fill {
    height: 100%;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
    transition: width var(--duration-normal) var(--ease-default);
}

.quiz-sheet__progress-text {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    white-space: nowrap;
    font-weight: 600;
}

.quiz-sheet__question {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
}

.quiz-sheet__question-header {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.quiz-sheet__question-header .question-number {
    margin-bottom: 0;
    flex-shrink: 0;
    padding: var(--space-1) var(--space-3);
}

.quiz-sheet__question-header .question-title {
    margin-bottom: 0;
    flex: 1;
}

.quiz-sheet__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
    margin-top: var(--space-5);
}

.quiz-sheet__footer .btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.quiz-sheet-toast {
    position: absolute;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-default);
    font-size: var(--text-sm);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 10;
}

.quiz-sheet-toast.visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
    .quiz-sheet__container {
        height: 95vh;
    }

    .quiz-sheet__body {
        padding: var(--space-4) var(--space-4);
    }

    .quiz-sheet__question {
        padding: var(--space-5);
    }
}