/* 
   Layout & Responsive Grid
   Privacy-first video discovery engine
   No tracking, no bloat, just structure
   
   All colors use CSS custom properties defined in styles.css.
   Dark mode is handled entirely by token overrides — no overrides needed here.
*/

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-page);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Sections */
.video-section,
.search-section {
    padding: 40px 0;
}

.video-section {
    background: var(--bg-section);
    border-bottom: 1px solid var(--border-default);
}

.search-section {
    background: var(--bg-page);
}

/* Video Section Layout */
.video-player-wrapper {
    display: grid;
    gap: 40px;
}

.video-player {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-player iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.empty-player {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a 0%, #333 100%);
    color: var(--text-muted);
    font-size: 1.2rem;
    text-align: center;
}

.video-info {
    display: grid;
    gap: 24px;
}

.video-title {
    font-size: 2rem;
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-default);
}

.meta-item {
    display: grid;
    gap: 4px;
}

.meta-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-meta);
}

.meta-value {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.video-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-body);
    max-width: 75ch;
}

.video-credits {
    display: grid;
    gap: 24px;
}

.credits-section {
    display: grid;
    gap: 12px;
}

.credits-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-meta);
}

.credits-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.credit-tag,
.tag-badge {
    display: inline-block;
    padding: 8px 12px;
    background: var(--bg-chip);
    color: var(--text-primary);
    border-radius: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.credit-tag:hover,
.tag-badge:hover {
    background: var(--bg-chip-hover);
    transform: translateY(-1px);
}

.no-videos {
    padding: 60px 20px;
    text-align: center;
    color: var(--text-muted);
}

/* Search Section Layout */
.search-container {
    display: grid;
    gap: 32px;
    /* contain: layout removed — creates a stacking context that traps the suggestion dropdown */
}

.search-box {
    width: 100%;
    display: flex;
    gap: 12px;
    align-items: stretch;
    /* contain: layout removed — same reason */
}

.search-input-wrapper {
    flex: 1;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 1px solid var(--border-input);
    border-radius: 6px;
    background: var(--bg-input);
    color: var(--text-primary);
    transition: border-color 0.2s ease;
}

.search-input::placeholder {
    color: var(--text-placeholder);
}

.search-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: var(--focus-ring);
}

.search-button {
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    background: var(--accent);
    color: var(--accent-text);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
}

.search-button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-btn);
}

.search-button:active {
    transform: translateY(0);
}

.search-button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.search-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-text {
    display: inline-block;
}

.btn-spinner {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--accent-text);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: 8px;
}

.btn-spinner.active {
    display: inline-block;
}

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

/* Suggestions Dropdown */
.search-suggestions {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    z-index: 2000;
}

.suggestions-list {
    background: var(--bg-elevated);
    border: 1px solid var(--border-elevated);
    border-radius: 4px;
    box-shadow: var(--shadow-dropdown);
    max-height: 400px;
    overflow-y: auto;
}

.suggestions-section {
    border-bottom: 1px solid var(--border-section);
}

.suggestions-section:last-child {
    border-bottom: none;
}

.suggestions-label {
    padding: 10px 16px;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-label);
    text-transform: uppercase;
    background: var(--bg-hover);
    border-bottom: 1px solid var(--border-section);
}

.suggestion-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.15s ease;
    gap: 12px;
}

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

.suggestion-item.checked {
    background: var(--bg-selected);
    font-weight: 600;
}

.suggestion-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.suggestion-name {
    flex: 1;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.suggestion-checkmark {
    color: var(--text-primary);
    font-weight: bold;
    font-size: 1.1rem;
}

/* Sub-label inside suggestions (e.g. "Less common") */
.suggestions-label--sub {
    padding: 6px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    background: var(--bg-page);
    border-top: 1px solid var(--border-section);
}

/* Server-side fallback trigger item */
.suggestion-item--server {
    border-top: 1px solid var(--border-section);
    color: var(--text-body);
    font-style: italic;
}

.suggestion-item--server:hover {
    background: var(--bg-selected);
}

.suggestion-item--server .suggestion-name strong {
    font-style: normal;
    font-weight: 600;
    color: var(--text-primary);
}

/* "No other matches" informational item */
.suggestion-item--none {
    color: var(--text-muted);
    font-style: italic;
    cursor: default;
}

.suggestion-item--none:hover {
    background: transparent;
}

/* Rare model results */
.suggestion-item--rare .suggestion-icon {
    opacity: 0.6;
}

/* Active Filters Display */
.active-filters {
    margin-bottom: 20px;
}

.active-filters-display {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding: 16px;
    background: var(--bg-active-bar);
    border-radius: 6px;
    border: 2px solid var(--border-active);
}

.active-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.active-filter-tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    gap: 6px;
    color: #fff;
}

.active-filter-tag:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.active-filter-tag.include {
    background: var(--badge-include-bg);
    border: 1px solid var(--badge-include-border);
}

.active-filter-tag.include:hover {
    background: var(--badge-include-hover);
}

.active-filter-tag.exclude {
    background: var(--badge-exclude-bg);
    border: 1px solid var(--badge-exclude-border);
}

.active-filter-tag.exclude:hover {
    background: var(--badge-exclude-hover);
}

/* Filters Panel */
.filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    contain: layout style;
}

.filter-loading {
    grid-column: 1 / -1;
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
}

.filter-group {
    display: grid;
    gap: 12px;
}

.filter-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-label);
}

.filter-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    margin: 0;
}

.filter-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
    padding-right: 8px;
}

.filter-options::-webkit-scrollbar {
    width: 6px;
}

.filter-options::-webkit-scrollbar-track {
    background: transparent;
}

.filter-options::-webkit-scrollbar-thumb {
    background: var(--border-input);
    border-radius: 3px;
}

.filter-options::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb);
}

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
    padding: 6px 0;
}

.filter-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent);
}

.filter-checkbox span {
    font-size: 0.9rem;
    color: var(--text-body);
}

/* Results Grid */
.search-results {
    padding-top: 8px;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    contain: layout;
}

.result-card {
    cursor: pointer;
    border-radius: 6px;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    transition: all 0.2s ease;
    contain: layout style paint;
    will-change: transform, box-shadow;
}

.result-card:hover {
    border-color: var(--scrollbar-thumb);
    box-shadow: var(--shadow-card);
    transform: translateY(-2px);
}

.result-thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
    overflow: hidden;
}

.result-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.result-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0);
    transition: background 0.2s ease;
    z-index: 10;
}

.result-card:hover .result-overlay {
    background: rgba(0, 0, 0, 0.4);
}

/* Thumbnail preview strip */
.result-thumbnails {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    gap: 2px;
    padding: 4px;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: 5;
}

.result-card:hover .result-thumbnails {
    opacity: 1;
}

.result-thumb {
    width: 40px;
    height: 30px;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0);
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.1s ease;
}

.result-thumb:hover {
    border-color: rgba(255, 255, 255, 0.8);
    transform: scale(1.1);
}

/* Preview video */
.result-preview-video {
    position: absolute;
    inset: 0;
    z-index: 8;
    opacity: 0;
    transition: opacity 0.2s ease;
    display: none;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.result-card:hover .result-preview-video {
    opacity: 1;
}

.result-info {
    padding: 12px;
}

.result-title {
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.result-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.no-results {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Focus visible for keyboard navigation */
.filter-checkbox input:focus-visible,
.search-input:focus-visible,
.result-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Accessibility: reduce motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .container { padding: 0 16px; }

    .video-section,
    .search-section { padding: 24px 0; }

    .video-player-wrapper { gap: 24px; }
    .video-title { font-size: 1.5rem; }
    .video-meta { gap: 16px; }

    .filters {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .filter-options {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    .results-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .container { padding: 0 12px; }

    .video-section,
    .search-section { padding: 16px 0; }

    .video-player-wrapper { gap: 16px; }
    .video-title { font-size: 1.25rem; }
    .video-meta { flex-direction: column; gap: 8px; }

    .search-input {
        padding: 12px 14px;
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .search-button {
        padding: 12px 20px;
        font-size: 0.9rem;
    }

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

    .results-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .result-info { padding: 8px; }
    .result-title { font-size: 0.75rem; }
}