:root {
    --viewer-bg: #0d0d0d;
    --viewer-text: #ffffff;
    --viewer-muted: rgba(255,255,255,0.7);
    --viewer-accent: #c9a050;
    --viewer-btn-bg: rgba(30,30,30,0.85);
    --viewer-btn-hover: rgba(60,60,60,0.9);
    --auto-hide-duration: 0.25s;
}

.viewer-app {
    position: relative;
}

.viewer-stage {
    position: relative;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: var(--viewer-bg);
    color: var(--viewer-text);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.viewer-osd {
    flex: 1;
    position: relative;
    min-height: 0;
}

.viewer-top-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem max(1rem, env(safe-area-inset-left));
    padding-top: max(1rem, env(safe-area-inset-top));
    background: linear-gradient(to bottom, rgba(0,0,0,0.6) 0%, transparent 100%);
    transition: opacity var(--auto-hide-duration), transform var(--auto-hide-duration);
}

.viewer-top-bar.hidden {
    opacity: 0;
    transform: translateY(-20px);
    pointer-events: none;
}

.viewer-back {
    color: var(--viewer-text);
    text-decoration: none;
    font-size: 1.5rem;
    padding: 0.5rem;
}

.viewer-title h1 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 500;
}
.viewer-title .original-title {
    display: block;
    font-size: 0.875rem;
    color: var(--viewer-muted);
}

.viewer-controls {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 20;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: opacity var(--auto-hide-duration), transform var(--auto-hide-duration);
}

.viewer-controls.hidden {
    opacity: 0;
    transform: translateY(-50%) translateX(20px);
    pointer-events: none;
}

.viewer-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--viewer-btn-bg);
    color: var(--viewer-text);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(4px);
    transition: background 0.15s, opacity 0.15s;
}

.viewer-btn:hover { background: var(--viewer-btn-hover); }
.viewer-btn.view-mode-fit {
    background: rgba(201, 160, 80, 0.35);
    box-shadow: 0 0 0 2px var(--viewer-accent);
}
.viewer-btn.hidden { display: none; }
.viewer-btn.disabled,
.viewer-btn:disabled {
    opacity: 0.35;
    cursor: default;
    pointer-events: none;
}

.viewer-thumb-track {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 20;
    padding: 1rem max(1rem, env(safe-area-inset-left));
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 100%);
    transition: opacity var(--auto-hide-duration), transform var(--auto-hide-duration);
}

.viewer-thumb-track.hidden {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

.thumb-list {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 0.25rem;
}
.thumb-list::-webkit-scrollbar { display: none; }

.thumb-item {
    flex: 0 0 auto;
    width: 72px;
    height: 72px;
    border: 1px solid rgba(220, 230, 245, 0.55);
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0.85;
    box-sizing: border-box;
    transition: opacity 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.thumb-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.thumb-item.active {
    border: 2px solid #4f8fd8;
    box-shadow: 0 0 0 1px rgba(79, 143, 216, 0.25);
    opacity: 1;
}
.thumb-item:hover {
    opacity: 1;
    border-color: rgba(220, 230, 245, 0.9);
}

.viewer-counter {
    position: absolute;
    bottom: 7.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    background: rgba(0,0,0,0.6);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.875rem;
    color: var(--viewer-text);
    transition: opacity var(--auto-hide-duration);
}
.viewer-counter.hidden { opacity: 0; pointer-events: none; }

.details-section {
    background: #424951;
    color: #e1e4e7;
    min-height: 100vh;
    padding: 0;
}

.details-layout {
    max-width: 1440px;
    margin: 0 auto;
    padding: 80px 56px 120px;
    display: grid;
    grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
    gap: 72px;
}

.details-sidebar {
    min-width: 0;
}

.details-sidebar-sticky {
    position: sticky;
    top: 32px;
    align-self: flex-start;
}

.details-cover {
    display: block;
    width: 100%;
    height: auto;
    max-height: 65vh;
    object-fit: contain;
    background: #363b42;
    border-radius: 4px;
}

.details-sidebar-title {
    margin: 18px 0 0;
    font-size: 1.375rem;
    font-weight: 600;
    color: #f4f5f6;
    line-height: 1.4;
}

.details-download {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 14px;
    color: #b8c0c8;
    text-decoration: none;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: color 0.15s;
}
.details-download:hover { color: #f4f5f6; }
.details-download.hidden { display: none; }
.download-icon { font-size: 1.125rem; }

.details-mobile-download { display: none; }

.details-main {
    min-width: 0;
}

.details-content {
    max-width: 900px;
}

.details-summary {
    border-bottom: 1px solid rgba(255,255,255,0.14);
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
}
.details-summary h2 {
    margin: 0 0 0.5rem;
    font-size: 2rem;
    color: #f4f5f6;
}
.details-summary .original {
    color: #b8c0c8;
    margin: 0 0 0.5rem;
}
.details-summary .meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    color: #b8c0c8;
}
.details-summary p {
    color: #e1e4e7;
    line-height: 1.8;
}

.details-block {
    margin-bottom: 2.5rem;
}
.details-block h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #f0f2f4;
    border-bottom: 1px solid rgba(255,255,255,0.14);
    padding-bottom: 0.25rem;
}
.details-block dl {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 0.5rem 1.5rem;
}
.details-block dt { font-weight: 600; color: #f0f2f4; }
.details-block dd { margin: 0; color: #e1e4e7; }

.details-block ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.details-block li {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.14);
    color: #e1e4e7;
}

@media (max-width: 1023px) {
    .details-layout {
        display: block;
        padding: 48px 24px 80px;
    }
    .details-sidebar {
        display: none;
    }
    .details-mobile-download {
        display: block;
        margin-top: 1rem;
    }
    .details-mobile-download a {
        display: inline-flex;
        align-items: center;
        gap: 0.35rem;
        color: #b8c0c8;
        text-decoration: none;
        font-size: 0.9375rem;
        transition: color 0.15s;
    }
    .details-mobile-download a:hover { color: #f4f5f6; }
    .details-block dl {
        grid-template-columns: 1fr;
        gap: 0.25rem 0;
    }
    .details-block dt { margin-top: 0.5rem; }
}

@media (max-width: 768px) {
    .viewer-controls {
        right: 0.5rem;
        gap: 0.35rem;
    }
    .viewer-btn {
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }
    .viewer-title h1 { font-size: 1rem; }
    .thumb-item { width: 56px; height: 56px; }
    .details-layout { padding: 40px 20px 64px; }
}

@media (prefers-reduced-motion: reduce) {
    .viewer-top-bar, .viewer-controls, .viewer-thumb-track, .viewer-counter {
        transition: none;
    }
}