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

:root {
    --bg-primary: #000000;
    --bg-secondary: rgba(0, 0, 0, 0.85);
    --bg-tertiary: rgba(255, 255, 255, 0.05);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --accent: #ffffff;
    --accent-hover: #e6e6e6;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: rgba(0, 0, 0, 0.4);
    color-scheme: dark;
}

html, body { height: 100%; }

body {
    margin: 0;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    overflow-x: hidden;
    font-size: 14px;
}

body.drawer-open {
    overflow: hidden;
}

body:not(.theme-light) {
    color-scheme: dark;
}

body.theme-light {
    --bg-primary: #ffffff;
    --bg-secondary: rgba(0, 0, 0, 0.08);
    --bg-tertiary: rgba(0, 0, 0, 0.07);
    --text-primary: #000000;
    --text-secondary: rgba(0, 0, 0, 0.7);
    --accent: #000000;
    --accent-hover: #1a1a1a;
    --border: rgba(0, 0, 0, 0.08);
    --shadow: rgba(0, 0, 0, 0.1);
    color-scheme: light;
}

/* Top Bar */
.top-bar {
    height: 64px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
    gap: 24px;
    backdrop-filter: blur(12px);
}

.logo {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.5px;
    color: var(--accent);
    flex-shrink: 0;
}

.search-container {
    flex: 1;
    max-width: 500px;
}

.search-container input {
    width: 100%;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.2s ease;
}

.search-container input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-tertiary);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

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

.actions {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.icon-btn {
    width: 48px;
    height: 48px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: all 0.2s ease;
    font-size: 20px;
}

.icon-btn:hover {
    background: var(--bg-tertiary);
    color: var(--accent);
}

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

/* CDN-served icon images (Heroicons) */
.icon-svg {
    width: 24px;
    height: 24px;
    display: block;
    filter: invert(100%) saturate(0%);
}

.icon-btn:hover .icon-svg {
    filter: none;
}

body.theme-light .icon-svg {
    filter: invert(0%) saturate(0%);
}

body.theme-light .icon-btn:hover .icon-svg {
    filter: none;
}

/* Hamburger Menu */
.hamburger {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
    transition: all 0.3s ease;
}

.menu-toggle.active .hamburger span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle.active .hamburger span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .hamburger span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    height: 100vh;
    background: var(--bg-secondary);
    z-index: 1001;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(15px);
}

body.theme-light .sidebar {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

.sidebar.open {
    right: 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 24px;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s ease;
}

.close-btn:hover {
    color: var(--accent);
}

.sidebar-content {
    flex: 1;
    padding: 12px 0;
    overflow-y: auto;
}

.sidebar-section {
    padding: 8px 0 4px 0;
    border-bottom: 1px solid var(--border);
}

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

.sidebar-subtitle {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    padding: 8px 24px 4px 24px;
}

.sidebar-item {
    display: block;
    padding: 12px 24px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.sidebar-item:hover {
    background: var(--bg-tertiary);
    border-left-color: var(--accent);
    color: var(--accent);
}

.setting-item {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}

.filters-container .setting-item {
    padding-top: 12px;
    padding-bottom: 12px;
}

.filters-empty {
    padding: 12px 24px 20px 24px;
    color: var(--text-secondary);
    font-size: 13px;
}

.setting-item label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.setting-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
}

.setting-label-row label {
    margin-bottom: 0;
}

.btn-link {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    text-decoration: underline;
    padding: 0;
}

.btn-link:hover {
    color: var(--text-primary);
}

.btn-link:disabled {
    color: var(--border);
    cursor: not-allowed;
    text-decoration: none;
}

.input-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.input-row input {
    flex: 1;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
}

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

.input-row input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

body.theme-light .input-row input:focus {
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

.btn-secondary {
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
    width: 100%;
    text-align: center;
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

.sources-list {
    padding: 8px 24px 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.source-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-tertiary);
}

.source-item span {
    font-size: 12px;
    color: var(--text-primary);
    word-break: break-all;
}

.source-item button {
    padding: 6px 8px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 12px;
}

.source-item button:hover {
    background: var(--bg-tertiary);
}

.setting-item select {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    color-scheme: dark;
    appearance: none;
    background-image:
        linear-gradient(45deg, transparent 50%, var(--text-secondary) 50%),
        linear-gradient(135deg, var(--text-secondary) 50%, transparent 50%),
        linear-gradient(to right, transparent, transparent);
    background-position:
        calc(100% - 16px) calc(1em + 1px),
        calc(100% - 11px) calc(1em + 1px),
        100% 0;
    background-size:
        5px 5px,
        5px 5px,
        2.5em 2.5em;
    background-repeat: no-repeat;
}

.multi-select {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.multi-select-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: transparent;
    transition: all 0.2s ease;
}

.multi-select-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    flex-shrink: 0;
}

.multi-select-item span {
    padding-left: 6px;
}

.multi-select-item:hover {
    border-color: var(--border);
    background: var(--bg-tertiary);
}

.multi-select-item input[type="checkbox"]:checked + span {
    color: var(--accent);
}

.setting-item select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
}

body.theme-light .setting-item select:focus {
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

.setting-item select,
.setting-item select option,
.setting-item select optgroup {
    background-color: #0a0a0a;
    color: #ffffff;
}

body.theme-light .setting-item select {
    color-scheme: light;
}

body.theme-light .setting-item select,
body.theme-light .setting-item select option,
body.theme-light .setting-item select optgroup {
    background-color: #ffffff;
    color: #000000;
}
.setting-item select option {
    background: #0a0a0a;
    color: #ffffff;
}

body.theme-light .setting-item select option {
    background: #ffffff;
    color: #000000;
}

/* Overlay */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.open {
    display: block;
}

.load-more-btn {
    position: sticky;
    left: 50%;
    transform: translateX(-50%);
    margin: 16px auto 32px auto;
    width: 52px;
    height: 52px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 10;
}

.load-more-btn:hover {
    background: var(--bg-tertiary);
}

.load-more-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Grid Container */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    padding: 24px;
    max-width: 100%;
}

@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 12px;
        padding: 16px;
    }

    .top-bar {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 16px;
    }

    .search-container {
        order: 3;
        width: 100%;
        max-width: 100%;
    }

    .actions {
        order: 2;
        width: 100%;
        justify-content: flex-end;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 18px;
    }

    .icon-btn {
        width: 44px;
        height: 44px;
    }
}

@media (min-width: 1600px) {
    body {
        font-size: 16px;
    }

    .top-bar {
        height: 72px;
        padding: 0 36px;
    }

    .grid-container {
        gap: 24px;
        padding: 32px 48px;
    }

    .video-card h4 {
        font-size: 16px;
    }

    .video-card p {
        font-size: 13px;
    }
}

@media (min-width: 1920px) {
    .grid-container {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (pointer: coarse) {
    .icon-btn {
        width: 52px;
        height: 52px;
    }

    .btn-secondary {
        padding: 10px 14px;
    }

    .setting-item select,
    .input-row input {
        padding: 10px 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}

/* Video Card */
.video-card {
    cursor: pointer;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--border);
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px var(--shadow);
}

.video-card img {
    width: 100%;
    height: auto;
    display: block;
    background: var(--bg-tertiary);
}

.video-card h4 {
    font-size: 14px;
    font-weight: 500;
    padding: 12px;
    line-height: 1.4;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-card p {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 0 12px 12px 12px;
    margin: 0;
}

.video-meta {
    padding-bottom: 4px;
}

.video-duration {
    color: var(--text-primary);
    opacity: 0.8;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: #000;
    z-index: 2000;
}

body.theme-light .modal {
    background: #0b0b0b;
}

.modal.open {
    display: flex;
}

.modal-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
    position: relative;
}

.close {
    position: absolute;
    top: 20px;
    right: 20px;
    color: #fff;
    font-size: 32px;
    cursor: pointer;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2001;
    transition: all 0.2s ease;
}

.close:hover {
    background: rgba(255, 255, 255, 0.2);
}

video {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100vh;
    object-fit: contain;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}