:root {
    --bg: #f5f6f9;
    --surface: #ffffff;
    --text: #1d2330;
    --muted: #5d6779;
    --border: #dde1ea;
    --accent: #c97a12;
    --link: #1f5fbf;
    --code-bg: #eef1f6;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Segoe UI", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
}

a {
    color: var(--link);
}

.page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 20px 48px;
}

.page.has-sidebar {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 32px;
}

.content {
    min-width: 0;
}

/* Hero and cards */
.hero {
    padding: 24px 0 8px;
}

.hero h1 {
    margin: 0 0 8px;
    font-size: 34px;
}

.hero p {
    margin: 0;
    color: var(--muted);
    font-size: 18px;
}

.card-group h2 {
    margin: 32px 0 12px;
    font-size: 22px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.card {
    display: block;
    padding: 16px 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    border-radius: 8px;
    color: inherit;
    text-decoration: none;
    transition: box-shadow 0.15s, transform 0.15s;
}

.card:hover {
    box-shadow: 0 4px 14px rgba(20, 30, 50, 0.12);
    transform: translateY(-1px);
}

.card h3 {
    margin: 0 0 6px;
    font-size: 18px;
    color: var(--link);
}

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

/* Wiki sidebar */
.sidebar {
    position: sticky;
    top: 16px;
    align-self: start;
    font-size: 14px;
}

.sidebar h2 {
    margin: 18px 0 4px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
}

.sidebar ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar a {
    display: block;
    padding: 3px 8px;
    border-radius: 4px;
    color: var(--text);
    text-decoration: none;
}

.sidebar a:hover {
    background: var(--code-bg);
}

.sidebar a[aria-current="page"] {
    background: var(--code-bg);
    color: var(--accent);
    font-weight: 600;
}

/* Article text (Markdown output) */
.prose {
    max-width: 860px;
}

.prose h1 {
    margin: 0 0 16px;
    font-size: 32px;
}

.prose h2 {
    margin: 32px 0 8px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--border);
}

.prose .summary {
    margin-top: -8px;
    color: var(--muted);
    font-size: 18px;
}

.prose code {
    padding: 1px 5px;
    background: var(--code-bg);
    border-radius: 4px;
    font-size: 0.9em;
}

.prose pre {
    padding: 12px 14px;
    overflow-x: auto;
    background: var(--code-bg);
    border-radius: 6px;
}

.prose pre code {
    padding: 0;
}

.prose table {
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 14px;
    display: block;
    overflow-x: auto;
}

.prose th,
.prose td {
    padding: 6px 10px;
    border: 1px solid var(--border);
    text-align: left;
}

.prose th {
    background: var(--code-bg);
}

.prose div.math {
    margin: 12px 0;
    padding: 4px 0;
    overflow-x: auto;
}

.prose blockquote {
    margin: 16px 0;
    padding: 8px 14px;
    border-left: 4px solid var(--accent);
    background: #fff7ea;
}

.site-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 13px;
    text-align: center;
}

@media (max-width: 760px) {
    .page.has-sidebar {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }
}