:root {
    color-scheme: light;
    --bg: #ffffff;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --line: #e5e7eb;
    --line-strong: #d1d5db;
    --text: #111827;
    --muted: #4b5563;
    --muted-soft: #6b7280;
    --accent: #ef4444;
    --accent-soft: #fef2f2;
    --code-bg: #f8fafc;
    --code-text: #111827;
    --radius: 10px;
    --sidebar-width: 280px;
    --max-width: 1440px;
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0f172a;
    --surface: #111827;
    --surface-muted: #1f2937;
    --line: #273244;
    --line-strong: #334155;
    --text: #e5e7eb;
    --muted: #cbd5e1;
    --muted-soft: #94a3b8;
    --accent: #f87171;
    --accent-soft: rgba(248, 113, 113, 0.12);
    --code-bg: #0b1220;
    --code-text: #e5e7eb;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 15px;
    line-height: 1.65;
}

a,
button,
input,
textarea,
select {
    font: inherit;
}

code,
pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

[hidden] {
    display: none !important;
}

.page-shell {
    width: min(calc(100% - 32px), var(--max-width));
    margin: 0 auto;
    padding: 20px 0 32px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-start;
    padding: 20px 0 24px;
    border-bottom: 1px solid var(--line);
}

.brand-block {
    max-width: 760px;
}

.eyebrow,
.control-label,
.sidebar-title,
.toc-title,
.section-kicker {
    margin: 0 0 6px;
    color: var(--muted-soft);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.brand-block h1,
.hero-copy h2,
.section-heading h2,
.doc-article h1,
.doc-article h2,
.doc-article h3 {
    margin: 0;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.brand-block h1 {
    font-size: 32px;
    font-weight: 700;
}

.lead {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 15px;
}

.control-panel {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: flex-start;
}

.control-group {
    display: grid;
    gap: 8px;
}

.segmented-control {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.control-button {
    padding: 7px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
}

.control-button:hover {
    border-color: var(--line-strong);
    color: var(--text);
}

.control-button.is-active {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
}

.layout {
    display: grid;
    grid-template-columns: minmax(240px, var(--sidebar-width)) minmax(0, 1fr);
    gap: 32px;
    margin-top: 24px;
    align-items: start;
}

.sidebar {
    position: sticky;
    top: 20px;
}

.sidebar-card,
.panel,
.hero-panel,
.toc-card {
    background: var(--surface);
}

.sidebar-card {
    padding: 0;
}

.doc-nav {
    display: grid;
    gap: 2px;
}

.doc-nav a {
    display: block;
    padding: 10px 12px;
    border-left: 2px solid transparent;
    color: var(--muted);
    text-decoration: none;
    border-radius: 0 8px 8px 0;
}

.doc-nav a:hover {
    background: var(--surface-muted);
    color: var(--text);
}

.doc-nav a.is-active {
    border-left-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
}

.nav-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
}

.nav-summary {
    display: block;
    margin-top: 4px;
    color: var(--muted-soft);
    font-size: 13px;
}

.content-column {
    display: grid;
    gap: 20px;
}

.hero-panel,
.panel {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.hero-panel {
    display: flex;
    justify-content: space-between;
    gap: 24px;
}

.hero-copy {
    max-width: 72ch;
}

.hero-copy h2 {
    font-size: 28px;
    font-weight: 700;
}

.hero-copy p {
    margin: 12px 0 0;
    color: var(--muted);
}

.hero-meta {
    display: grid;
    gap: 12px;
    min-width: 220px;
}

.meta-card {
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-muted);
}

.meta-value {
    display: block;
    font-size: 16px;
    font-weight: 600;
}

.meta-label {
    color: var(--muted-soft);
    font-size: 13px;
}

.section-heading {
    margin-bottom: 18px;
}

.section-heading h2 {
    font-size: 22px;
    font-weight: 700;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

html[data-view="list"] .docs-grid {
    grid-template-columns: 1fr;
}

.doc-card {
    display: grid;
    gap: 10px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface);
    color: inherit;
    text-decoration: none;
}

.doc-card:hover {
    border-color: var(--line-strong);
}

.doc-badge {
    display: inline-flex;
    width: fit-content;
    padding: 4px 8px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted-soft);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.doc-card h3 {
    margin: 0;
    font-size: 17px;
    font-weight: 700;
}

.doc-card p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.doc-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 28px;
}

.doc-article {
    display: grid;
    gap: 28px;
}

.doc-article section {
    display: grid;
    gap: 12px;
    scroll-margin-top: 24px;
}

.doc-article h1 {
    font-size: 28px;
    font-weight: 700;
}

.doc-article h2 {
    font-size: 24px;
    font-weight: 700;
}

.doc-article h3 {
    font-size: 19px;
    font-weight: 600;
}

.doc-article p,
.doc-article ul,
.doc-article ol {
    margin: 0;
}

.doc-article ul,
.doc-article ol {
    padding-left: 20px;
}

.doc-article li + li {
    margin-top: 6px;
}

.doc-article a,
.toc-nav a {
    color: var(--accent);
    text-decoration: none;
}

.doc-article a:hover,
.toc-nav a:hover {
    text-decoration: underline;
}

.doc-article code:not(pre code) {
    padding: 0.16em 0.4em;
    border-radius: 6px;
    background: var(--surface-muted);
    color: var(--code-text);
    font-size: 0.92em;
}

pre {
    overflow-x: auto;
    margin: 0;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--code-bg);
    color: var(--code-text);
    font-size: 13px;
    line-height: 1.7;
}

.callout {
    padding: 14px 16px;
    border-left: 3px solid var(--accent);
    background: var(--accent-soft);
    border-radius: 0 8px 8px 0;
    color: var(--muted);
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 680px;
}

th,
td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

th {
    background: var(--surface-muted);
    font-size: 13px;
    font-weight: 600;
}

td {
    font-size: 14px;
}

tr:last-child td {
    border-bottom: 0;
}

.toc-card {
    position: sticky;
    top: 20px;
    padding: 0;
}

.toc-nav {
    display: grid;
    gap: 2px;
}

.toc-nav a {
    display: block;
    padding: 8px 10px;
    border-left: 2px solid transparent;
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
}

.toc-nav a:hover {
    border-left-color: var(--line-strong);
    background: var(--surface-muted);
    color: var(--text);
    text-decoration: none;
}

.link-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.text-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    background: var(--surface);
}

.text-link:hover {
    border-color: var(--line-strong);
    background: var(--surface-muted);
}

@media (max-width: 1100px) {
    .topbar,
    .hero-panel {
        flex-direction: column;
    }

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

    .toc-card {
        position: static;
    }
}

@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .sidebar {
        position: static;
    }
}

@media (max-width: 640px) {
    .page-shell {
        width: min(calc(100% - 20px), var(--max-width));
        padding-top: 12px;
    }

    .topbar {
        padding-bottom: 16px;
    }

    .hero-panel,
    .panel {
        padding: 18px;
    }

    .brand-block h1 {
        font-size: 26px;
    }

    .hero-copy h2,
    .doc-article h1,
    .doc-article h2 {
        font-size: 22px;
    }
}