/* Clusterra docs — reskin over landing design tokens (/styles-2026.css).
   Layout: fixed ~280px sidebar + content area, prose max-width ~720px.
   Tokens (--bg, --surface, --accent, etc.) inherited from landing stylesheet. */

body {
    display: flex;
    min-height: 100vh;
    /* Landing sets min-height already; flex is docs-specific. */
}

/* ---------- Sidebar ---------- */
.sidebar {
    width: 280px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 1.75rem 1.25rem;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    font-family: var(--font-body);
}

.sidebar .logo {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1.75rem;
    padding: 0 0.5rem 1.25rem;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-display);
}

.sidebar .logo-text {
    color: var(--text);
    font-size: 1.0625rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.sidebar .logo-dot {
    color: var(--accent);
    font-size: 1.0625rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.sidebar .version {
    color: var(--text-3);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-left: auto;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-3);
    margin-bottom: 0.5rem;
    padding: 0 0.75rem;
}

.nav-links { list-style: none; }

.nav-links li { margin-bottom: 0.125rem; }

.nav-links a {
    display: block;
    padding: 0.45rem 0.75rem;
    color: var(--text-2);
    text-decoration: none;
    border-radius: var(--r-sm);
    font-size: 0.9rem;
    transition: background var(--t-fast), color var(--t-fast);
}

.nav-links a:hover {
    background: var(--surface-2);
    color: var(--text);
}

.nav-links a.active {
    background: var(--accent-dim);
    color: var(--accent);
    box-shadow: inset 2px 0 0 var(--accent);
}

.external-links {
    margin-top: auto;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.external-links a {
    color: var(--text-2);
    text-decoration: none;
    font-size: 0.85rem;
    padding: 0.4rem 0.75rem;
    border-radius: var(--r-sm);
    transition: background var(--t-fast), color var(--t-fast);
}

.external-links a:hover {
    background: var(--surface-2);
    color: var(--accent);
}

/* ---------- Content ---------- */
.content {
    margin-left: 280px;
    padding: 3.5rem 4rem 5rem;
    max-width: calc(720px + 280px + 8rem);
    width: 100%;
}

.content > article {
    max-width: 720px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 {
    font-size: var(--fs-4xl);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

h2 {
    font-size: var(--fs-2xl);
    font-weight: 600;
    margin-top: 3rem;
    margin-bottom: 0.85rem;
    padding-top: 0.5rem;
}

h3 {
    font-size: var(--fs-xl);
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

h4 {
    font-size: var(--fs-lg);
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

p {
    color: var(--text-2);
    margin-bottom: 1rem;
}

.lede {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    line-height: 1.4;
    color: var(--text);
    margin-bottom: 2.5rem;
    max-width: 40ch;
    font-weight: 400;
}

ul, ol {
    margin-left: 1.25rem;
    margin-bottom: 1.25rem;
    color: var(--text-2);
}

li { margin-bottom: 0.4rem; }

li strong { color: var(--text); font-weight: 600; }

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--t-fast);
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
    text-underline-offset: 3px;
}

strong { color: var(--text); }

/* ---------- Code ---------- */
code {
    background: var(--surface-3);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--text);
    border: 1px solid var(--border);
}

pre {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin: 1.25rem 0 1.75rem;
    font-size: 0.85rem;
    line-height: 1.6;
    font-family: var(--font-mono);
}

pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: inherit;
    color: var(--text);
}

/* ---------- Cards (index grid) ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 0.75rem;
    margin: 2rem 0 1.5rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    transition: border-color var(--t-fast), transform var(--t-fast);
}

.card:hover {
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.card a {
    display: block;
    padding: 1.25rem 1.5rem;
    color: inherit;
    text-decoration: none;
}

.card a:hover { text-decoration: none; }

.card h3 {
    margin-top: 0;
    margin-bottom: 0.35rem;
    font-size: var(--fs-lg);
    color: var(--text);
}

.card p {
    margin-bottom: 0;
    font-size: 0.9rem;
    color: var(--text-2);
}

/* ---------- Callouts ---------- */
.callout {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 2px solid var(--accent);
    padding: 0.85rem 1.1rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--r-md) var(--r-md) 0;
    color: var(--text-2);
    font-size: 0.95rem;
}

.callout strong { color: var(--text); }

/* ---------- Tables ---------- */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.25rem 0 1.75rem;
    font-size: 0.92rem;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    overflow: hidden;
}

th, td {
    text-align: left;
    padding: 0.7rem 0.9rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-2);
}

tr:last-child td { border-bottom: none; }

th {
    color: var(--text);
    font-weight: 600;
    background: var(--surface-2);
    font-family: var(--font-display);
    font-size: 0.82rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

td code { font-size: 0.82em; }

/* ---------- Diagram ---------- */
.diagram {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 1.5rem;
    margin: 1.75rem 0;
    overflow-x: auto;
}

.diagram svg {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    body { flex-direction: column; }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 1.25rem;
    }

    .content {
        margin-left: 0;
        padding: 2rem 1.25rem 3rem;
        max-width: 100%;
    }
}