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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0f1117;
    color: #e4e4e7;
    line-height: 1.55;
    padding: 20px 24px;
}

header {
    max-width: 1400px;
    margin: 0 auto 20px;
    text-align: center;
}

header h1 {
    font-size: 1.9rem;
    color: #fff;
    margin-bottom: 6px;
}

.subtitle {
    color: #a1a1aa;
    font-size: 0.95rem;
}

.meta-line {
    color: #71717a;
    font-size: 0.78rem;
    margin-top: 6px;
}

.ds-pill {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 0.72rem;
    font-weight: 600;
    margin: 0 2px;
    color: #fff;
}
.ds-pill.bcp { background: #b45309; }
.ds-pill.mon { background: #6366f1; }
.ds-pill.qmp { background: #0e7490; }

/* Layout */
.layout {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
}

/* Sidebar */
.sidebar {
    background: #1c1c22;
    border: 1px solid #2e2e36;
    border-radius: 12px;
    padding: 16px;
    height: fit-content;
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
}

.sidebar h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: #a1a1aa;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

#clusterList {
    list-style: none;
    padding: 0;
    counter-reset: cluster;
}

#clusterList li {
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
    border: 1px solid transparent;
    margin-bottom: 4px;
}

#clusterList li:hover { background: #27272a; }

#clusterList li.active {
    background: #312e81;
    border-color: #6366f1;
}

.cluster-li-name {
    color: #e4e4e7;
    font-size: 0.92rem;
    font-weight: 500;
    display: block;
    margin-bottom: 2px;
}

.cluster-li-meta {
    font-size: 0.72rem;
    color: #a1a1aa;
    display: flex;
    gap: 8px;
}

.sidebar-foot {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid #2e2e36;
    font-size: 0.72rem;
    color: #71717a;
    line-height: 1.5;
}

.sidebar-foot code {
    color: #a78bfa;
    font-size: 0.7rem;
}

/* Main */
.main { min-width: 0; }

#loading {
    text-align: center;
    padding: 60px 20px;
    color: #a1a1aa;
    font-size: 1.05rem;
}

.cluster-header {
    background: #1c1c22;
    border: 1px solid #2e2e36;
    border-radius: 12px;
    padding: 22px 24px;
    margin-bottom: 16px;
}

.cluster-title-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.cluster-index {
    background: #6366f1;
    color: #fff;
    padding: 3px 12px;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.cluster-header h2 {
    font-size: 1.35rem;
    color: #fff;
    line-height: 1.4;
}

.cluster-def {
    color: #d4d4d8;
    margin: 8px 0 14px;
    font-size: 0.95rem;
}

.cluster-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.chip {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 0.74rem;
    background: #27272a;
    border: 1px solid #3f3f46;
    color: #d4d4d8;
}
.chip.principle { background: #1e1b4b; border-color: #3730a3; color: #c7d2fe; }
.chip.qclass    { background: #082f49; border-color: #075985; color: #bae6fd; }
.chip.count     { background: #14532d; border-color: #166534; color: #a7f3d0; font-variant-numeric: tabular-nums; }

.dataset-breakdown {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.ds-bar {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 9px;
    border-radius: 8px;
    font-size: 0.74rem;
    font-variant-numeric: tabular-nums;
    background: #0a0a0f;
    border: 1px solid #2e2e36;
}
.ds-bar .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.ds-bar.bcp .dot { background: #f59e0b; }
.ds-bar.mon .dot { background: #818cf8; }
.ds-bar.qmp .dot { background: #22d3ee; }

.aliases {
    font-size: 0.78rem;
    color: #a1a1aa;
    margin-top: 6px;
}
.aliases .alias-label {
    color: #71717a;
    margin-right: 6px;
}
.aliases code {
    background: #0a0a0f;
    border: 1px solid #2e2e36;
    border-radius: 4px;
    padding: 1px 6px;
    margin-right: 4px;
    color: #c7d2fe;
    font-size: 0.74rem;
}

/* Dataset tabs */
.ds-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
}

.ds-tab {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid #2e2e36;
    border-radius: 8px;
    background: #1c1c22;
    color: #a1a1aa;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 600;
    transition: all 0.15s;
}
.ds-tab:hover { background: #27272a; color: #e4e4e7; }
.ds-tab.active.bcp { background: #422006; color: #fbbf24; border-color: #b45309; }
.ds-tab.active.mon { background: #1e1b4b; color: #c7d2fe; border-color: #6366f1; }
.ds-tab.active.qmp { background: #082f49; color: #bae6fd; border-color: #0e7490; }
.ds-tab.disabled {
    cursor: not-allowed;
    opacity: 0.4;
}

/* Example */
.example {
    background: #1c1c22;
    border: 1px solid #2e2e36;
    border-radius: 12px;
    overflow: hidden;
}

.example-header {
    padding: 18px 22px;
    border-bottom: 1px solid #2e2e36;
    background: #16161c;
}

.example-title-row {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.unit-id {
    color: #a78bfa;
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 0.78rem;
    background: #0a0a0f;
    border: 1px solid #2e2e36;
    border-radius: 6px;
    padding: 2px 8px;
}

.example-header h3 {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
}

.unit-meta {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 6px 14px;
}

.kv {
    display: contents;
}

.kv .k {
    color: #71717a;
    font-size: 0.78rem;
    text-transform: lowercase;
    font-family: 'SFMono-Regular', Consolas, monospace;
    padding-top: 1px;
}

.kv .v {
    color: #d4d4d8;
    font-size: 0.88rem;
    line-height: 1.5;
}

/* Scaffold block */
.scaffold-block {
    padding: 0;
}

.scaffold-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 22px;
    background: #131318;
    border-bottom: 1px solid #2e2e36;
}

.scaffold-label {
    font-size: 0.84rem;
    font-weight: 600;
    color: #a1a1aa;
}

.scaffold-info {
    font-size: 0.74rem;
    color: #71717a;
    font-variant-numeric: tabular-nums;
}

.scaffold-toggle {
    margin-left: auto;
    display: flex;
    gap: 4px;
    background: #0a0a0f;
    border: 1px solid #2e2e36;
    border-radius: 6px;
    padding: 2px;
}

.render-tab {
    background: transparent;
    border: none;
    color: #71717a;
    font-size: 0.74rem;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
}

.render-tab.active {
    background: #6366f1;
    color: #fff;
}

.scaffold-body {
    padding: 20px 24px;
    max-height: 70vh;
    overflow: auto;
    font-size: 0.88rem;
}

.scaffold-body.raw {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 0.78rem;
    white-space: pre-wrap;
    word-break: break-word;
    color: #d4d4d8;
    background: #0a0a0f;
}

/* Markdown rendered */
.markdown h1, .markdown h2, .markdown h3, .markdown h4 {
    color: #fff;
    margin: 18px 0 8px;
    line-height: 1.3;
}
.markdown h1 { font-size: 1.25rem; border-bottom: 1px solid #2e2e36; padding-bottom: 6px; }
.markdown h2 { font-size: 1.1rem; color: #c7d2fe; }
.markdown h3 { font-size: 1.0rem; color: #bae6fd; }
.markdown h4 { font-size: 0.92rem; color: #a7f3d0; }
.markdown h1:first-child, .markdown h2:first-child, .markdown h3:first-child {
    margin-top: 0;
}

.markdown p, .markdown ul, .markdown ol, .markdown blockquote, .markdown pre, .markdown table {
    margin: 8px 0;
}

.markdown ul, .markdown ol {
    padding-left: 22px;
}
.markdown li { margin: 2px 0; }

.markdown code {
    background: #0a0a0f;
    border: 1px solid #2e2e36;
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 0.82em;
    color: #fbbf24;
}

.markdown pre {
    background: #0a0a0f;
    border: 1px solid #2e2e36;
    border-radius: 8px;
    padding: 12px;
    overflow-x: auto;
    font-size: 0.8rem;
}
.markdown pre code {
    background: transparent;
    border: none;
    padding: 0;
    color: #d4d4d8;
}

.markdown table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.82rem;
}
.markdown th, .markdown td {
    border: 1px solid #2e2e36;
    padding: 6px 10px;
    text-align: left;
    vertical-align: top;
}
.markdown th {
    background: #16161c;
    color: #c7d2fe;
    font-weight: 600;
}

.markdown blockquote {
    border-left: 3px solid #6366f1;
    padding: 4px 12px;
    background: #16161c;
    color: #a1a1aa;
}

.markdown hr {
    border: none;
    border-top: 1px solid #2e2e36;
    margin: 16px 0;
}

.markdown a {
    color: #818cf8;
    text-decoration: none;
}
.markdown a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
        max-height: 320px;
    }
}