/* ===================================================
   Channel Detail Page
   Review improvements applied: 20 + 12 visual items
   Shared styles loaded from: public-common.css
   =================================================== */

/* [V#7] Increased bottom padding */
.ch-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 0 4rem;
}

/* === Hero Section: Banner + Channel Info === */
.ch-hero {
    position: relative;
    border-radius: var(--card-radius);
    overflow: hidden;
    margin-bottom: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

/* [V#1] Reduced banner height for first-view optimization */
.ch-banner {
    width: 100%;
    height: 140px;
    background: linear-gradient(135deg,
        rgba(var(--accent-rgb), 0.3) 0%,
        rgba(var(--accent-rgb), 0.08) 50%,
        rgba(var(--accent-rgb), 0.15) 100%
    );
    position: relative;
    overflow: hidden;
}

.ch-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 60%, rgba(var(--accent-rgb), 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 30%, rgba(var(--key-led-rgb, var(--accent-rgb)), 0.15) 0%, transparent 40%);
}

.ch-banner-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.04;
    background-image:
        repeating-linear-gradient(45deg, var(--text-primary) 0px, var(--text-primary) 1px, transparent 1px, transparent 12px),
        repeating-linear-gradient(-45deg, var(--text-primary) 0px, var(--text-primary) 1px, transparent 1px, transparent 12px);
}

.ch-hero-body {
    display: flex;
    gap: 1.25rem;
    padding: 0 1.5rem 1.5rem;
    margin-top: -48px;
    position: relative;
    z-index: 1;
}

.ch-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    border: 3px solid var(--card-bg);
    background: var(--tag-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--accent);
    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    overflow: hidden;
}

.ch-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ch-hero-info {
    flex: 1;
    min-width: 0;
    padding-top: 52px;
}

/* [V#2] Larger channel name for visual hierarchy */
.ch-name {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 0.25rem;
}

.ch-youtube-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.25s;
    margin-bottom: 0.5rem;
}

/* [D#1] YouTube red via CSS variable */
.ch-youtube-link:hover {
    color: var(--youtube-red);
}

.ch-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-bottom: 0.75rem;
}

.ch-badge {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}

/* [D#2] Badge colors via CSS variables */
.ch-badge-popular {
    background: var(--badge-popular-bg);
    color: var(--badge-popular-fg);
}

.ch-badge-beginner {
    background: var(--badge-beginner-bg);
    color: var(--badge-beginner-fg);
}

.ch-badge-expert {
    background: var(--badge-expert-bg);
    color: var(--badge-expert-fg);
}

.ch-badge-trusted {
    background: rgba(var(--accent-rgb), 0.1);
    color: var(--accent);
}

.ch-catchphrase {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 0.25rem;
}

/* === Stats Cards === */
/* [V#3] Wider gap for breathing room */
.ch-stats {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.25rem;
    padding: 0 1.5rem 1.5rem;
}

.ch-stat-card {
    background: var(--body-bg);
    border-radius: 0.5rem;
    padding: 0.75rem;
    text-align: center;
    transition: transform 0.25s;
}

.ch-stat-card:hover {
    transform: translateY(-2px);
}

.ch-stat-icon {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: 0.25rem;
}

.ch-stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.ch-stat-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}

/* === Conquest Dashboard (Logged-in) === */
/* [D#5] Primary card: stronger border + shadow for visual hierarchy */
.ch-conquest {
    background: var(--card-bg);
    border: 2px solid rgba(var(--accent-rgb), 0.2);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 12px rgba(var(--accent-rgb), 0.08);
}

.ch-conquest-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.ch-conquest-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.ch-conquest-title i {
    color: var(--accent);
}

.ch-conquest-rate {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

/* [PM#8] Motivation message */
.ch-conquest-message {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 0.625rem;
}

.ch-conquest-message strong {
    color: var(--accent);
    font-size: 1.05em;
}

.ch-conquest-message .conquest-rarity {
    opacity: 0.7;
}

.ch-conquest-bar-wrap {
    background: var(--body-bg);
    border-radius: 8px;
    height: 10px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.ch-conquest-bar {
    height: 100%;
    border-radius: 8px;
    background: linear-gradient(90deg, var(--accent), rgba(var(--accent-rgb), 0.7));
    transition: width 0.4s ease;
}

.ch-conquest-detail {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.ch-conquest-reward {
    color: var(--accent);
    font-weight: 600;
}

/* [PM#8] Remaining difficulty breakdown */
.ch-conquest-remaining {
    display: flex;
    gap: 0.75rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.ch-conquest-remaining i {
    font-size: 0.5rem;
    vertical-align: middle;
    margin-right: 2px;
}

.ch-conquest-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

.ch-conquest-stat {
    text-align: center;
    padding: 0.625rem;
    background: var(--body-bg);
    border-radius: 0.5rem;
}

.ch-conquest-stat-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.ch-conquest-stat-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}

/* === Channel Ranking === */
.ch-ranking {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.ranking-tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.ranking-tab {
    padding: 0.375rem 0.875rem;
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s;
}

.ranking-tab.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.ranking-tab:hover:not(.active) {
    background: var(--tag-bg);
}

/* Podium TOP 3 */
.ch-podium {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    padding: 0.5rem 0;
}

.ch-podium-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    text-decoration: none;
    color: inherit;
    transition: transform 0.25s;
}

.ch-podium-item:hover {
    transform: translateY(-3px);
}

.ch-podium-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--tag-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

/* [D#1] Medal colors via CSS variables */
.ch-podium-item[data-rank="1"] .ch-podium-avatar {
    width: 56px;
    height: 56px;
    border-color: var(--medal-gold);
    box-shadow: 0 0 12px var(--medal-gold-shadow);
}

.ch-podium-item[data-rank="2"] .ch-podium-avatar {
    border-color: var(--medal-silver);
}

.ch-podium-item[data-rank="3"] .ch-podium-avatar {
    border-color: var(--medal-bronze);
}

.ch-podium-medal {
    font-size: 1.25rem;
    line-height: 1;
}

.ch-podium-name {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-primary);
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
}

.ch-podium-score {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.ch-podium-block {
    width: 80px;
    border-radius: 6px 6px 0 0;
    background: linear-gradient(180deg, rgba(var(--accent-rgb), 0.12), rgba(var(--accent-rgb), 0.04));
    border: 1px solid var(--border-color);
    border-bottom: none;
}

.ch-podium-item[data-rank="1"] .ch-podium-block { height: 72px; }
.ch-podium-item[data-rank="2"] .ch-podium-block { height: 52px; }
.ch-podium-item[data-rank="3"] .ch-podium-block { height: 36px; }

/* Ranking Table */
.ch-ranking-body {
    margin-bottom: 0.75rem;
}

/* [V#4] Ranking header row visual separation */
.ranking-row-header {
    display: grid;
    grid-template-columns: 36px 1fr auto auto;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.5rem;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--tag-bg);
    border-radius: 6px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 0.25rem;
}

.ranking-row {
    display: grid;
    grid-template-columns: 36px 1fr auto auto;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.5rem;
    border-radius: 6px;
    transition: background 0.15s;
    text-decoration: none;
    color: inherit;
}

.ranking-row:hover {
    background: var(--tag-bg);
}

.ranking-row.my-rank {
    background: rgba(var(--accent-rgb), 0.08);
    border: 1px solid rgba(var(--accent-rgb), 0.2);
}

.ranking-pos {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-size: 0.78rem;
    font-weight: 700;
    background: var(--tag-bg);
    color: var(--text-secondary);
}

/* [D#1] Medal gradient colors via CSS variables */
.ranking-pos.gold { background: linear-gradient(135deg, var(--medal-gold), var(--medal-gold-dim)); color: var(--medal-gold-text); }
.ranking-pos.silver { background: linear-gradient(135deg, var(--medal-silver-dim), var(--medal-silver)); color: var(--medal-silver-text); }
.ranking-pos.bronze { background: linear-gradient(135deg, var(--medal-bronze-dim), var(--medal-bronze)); color: #fff; }

.ranking-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ranking-name .my-label {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent);
    margin-left: 0.375rem;
}

.ranking-score {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.ranking-detail {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-align: right;
    white-space: nowrap;
}

.ranking-more {
    display: block;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    padding: 0.5rem;
    transition: opacity 0.25s;
}

.ranking-more:hover {
    opacity: 0.7;
}

/* === Video Grid Section === */
.ch-video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* [V#5] Larger load-more button */
.ch-load-more {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    background: var(--card-bg);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
    margin-bottom: 1.5rem;
}

.ch-load-more:hover {
    border-color: rgba(var(--accent-rgb), 0.3);
    color: var(--accent);
    background: rgba(var(--accent-rgb), 0.04);
}

/* === Description === */
.ch-description {
    margin-bottom: 1.5rem;
}

.ch-description-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* === Typing Insights === */
.ch-insights {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.ch-insights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.ch-insight-item {
    text-align: center;
    padding: 0.625rem;
    background: var(--body-bg);
    border-radius: 0.5rem;
}

.ch-insight-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.ch-insight-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}

.ch-insight-bar-wrap {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    margin-top: 0.375rem;
    overflow: hidden;
}

.ch-insight-bar {
    height: 100%;
    border-radius: 2px;
    background: var(--accent);
}

/* [V#8] Enhanced video card hover on this page */
.ch-video-grid .movie-card {
    transition: transform 0.25s, box-shadow 0.25s;
}

.ch-video-grid .movie-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

/* === Responsive === */
@media (max-width: 992px) {
    .ch-stats {
        grid-template-columns: repeat(3, 1fr);
        padding: 0 1rem 1rem;
    }

    .ch-hero-body {
        padding: 0 1rem 1rem;
    }

    .ch-conquest-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    /* [PM#7] Reduced banner height for mobile first-view optimization */
    .ch-banner {
        height: 80px;
    }

    .ch-hero-body {
        gap: 0.75rem;
        margin-top: -28px;
        padding: 0 0.75rem 1rem;
    }

    /* [PM#7] Smaller avatar on mobile */
    .ch-avatar {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }

    .ch-hero-info {
        padding-top: 32px;
    }

    /* [V#9] Larger channel name on mobile */
    .ch-name {
        font-size: 1.5rem;
    }

    /* [V#12] Larger YouTube link on mobile */
    .ch-youtube-link {
        font-size: 0.875rem;
        padding: 0.375rem 0;
    }

    /* [V#11] Compact badges on mobile */
    .ch-badges {
        gap: 0.25rem;
    }

    .ch-badge {
        padding: 2px 8px;
        font-size: 0.65rem;
    }

    /* [D#4] Mobile: 2 columns with 5th spanning full width */
    .ch-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        padding: 0 0.75rem 1rem;
    }

    .ch-stat-card {
        padding: 0.5rem 0.25rem;
    }

    .ch-stat-card:nth-child(5) {
        grid-column: span 2;
    }

    /* [V#10] Larger stat values on mobile */
    .ch-stat-value {
        font-size: 1.15rem;
    }

    .ch-stat-label {
        font-size: 0.6rem;
    }

    .ch-podium {
        gap: 0.5rem;
    }

    .ch-podium-item[data-rank="1"] .ch-podium-avatar {
        width: 48px;
        height: 48px;
    }

    .ch-podium-avatar {
        width: 40px;
        height: 40px;
    }

    .ch-podium-block {
        width: 64px;
    }

    .ranking-row-header {
        grid-template-columns: 30px 1fr auto;
        gap: 0.5rem;
    }

    .ranking-row-header span:last-child {
        display: none;
    }

    .ranking-row {
        grid-template-columns: 30px 1fr auto;
        gap: 0.5rem;
    }

    .ranking-detail {
        display: none;
    }

    .ch-video-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 0.75rem;
    }

    .ch-conquest-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    .ch-insights-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}