:root {
    --sidebar-width: 260px;
    --bg: #f4f4f7;
    --sidebar-bg: #1b1f3a;
    --card-bg: #ffffff;
    --text: #1e1e2d;
    --muted: #6b6f85;
    --accent: #ff7a18;
    --border: rgba(0, 0, 0, 0.08);
    font-family: "Nunito", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

.sideatlas-body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
}

.sideatlas-layout {
    display: flex;
    min-height: 100vh;
}

.sideatlas-sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: #fdfdff;
    display: flex;
    flex-direction: column;
    padding: 24px 18px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header h1 {
    margin: 0;
    font-size: 22px;
}

.sidebar-header p {
    margin: 6px 0 20px;
    color: rgba(255, 255, 255, 0.7);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.nav-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
}

.nav-id {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

.sidebar-search {
    margin-top: 16px;
    display: flex;
    gap: 8px;
}

.sidebar-search input {
    flex: 1;
    border: none;
    border-radius: 8px;
    padding: 8px;
}

.sidebar-search button {
    border: none;
    border-radius: 8px;
    background: var(--accent);
    color: #fff;
    padding: 8px 12px;
}

.sideatlas-main {
    flex: 1;
    padding: 32px;
    max-width: calc(100vw - var(--sidebar-width));
}

.sideatlas-section {
    margin-bottom: 32px;
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.section-head h2 {
    margin: 0;
    font-size: 20px;
}

.section-head a {
    color: var(--accent);
    text-decoration: none;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 18px;
}

.video-card {
    background: var(--card-bg);
    border-radius: 14px;
    border: 1px solid var(--border);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform .2s ease;
}

.video-card:hover {
    transform: translateY(-4px);
}

.card-thumb {
    position: relative;
    padding-top: 58%;
    overflow: hidden;
}

.card-thumb img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-body {
    padding: 14px;
}

.card-body h3 {
    margin: 0 0 6px;
    font-size: 16px;
}

.card-body p {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
}

.empty-state {
    border: 1px dashed var(--border);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    background: rgba(255, 255, 255, 0.6);
    color: var(--muted);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 18px;
}

.pagination a,
.pagination span {
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text);
}

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

.detail-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.detail-card,
.player-card,
.desc-card {
    background: var(--card-bg);
    border-radius: 14px;
    border: 1px solid var(--border);
    padding: 18px;
}

.player-card {
    padding: 0;
    overflow: hidden;
}

#artplayer-container {
    width: 100%;
    aspect-ratio: 16/9;
}

.source-list,
.episode-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 16px 18px;
}

.source-btn,
.episode-btn {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fff;
    padding: 4px 10px;
    cursor: pointer;
}

.source-btn.active,
.episode-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.desc-card p {
    margin: 0;
    line-height: 1.7;
    color: var(--muted);
}

.sideatlas-footer {
    margin-top: 40px;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
}

@media (max-width: 920px) {
    .sideatlas-sidebar {
        position: fixed;
        z-index: 10;
        transform: translateX(-100%);
        transition: transform .2s;
    }

    .sideatlas-sidebar.open {
        transform: translateX(0);
    }

    .sideatlas-main {
        max-width: 100%;
        padding: 24px 16px;
    }

    .detail-layout {
        grid-template-columns: 1fr;
    }
}