:root {
    color-scheme: light dark;
    --font-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-mono: ui-monospace, "SF Mono", Menlo, monospace;
    --max-width: 70ch;
    --line-height: 1.15;
    --space: 1.25rem;
    --radius: 6px;
    --sidebar-width: 250px;
}
body {
    margin: 0;
    display: flex;
    font-family: var(--font-sans-serif);
    line-height: var(--line-height);
    font-size: 1rem;
}
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
    padding: var(--space);
    box-sizing: border-box;
}
.sidebar ul { list-style: none; padding: 0; margin: 0; }
.sidebar details ul { padding-left: 1rem; }
.sidebar li { margin: 0.2rem 0; }
.sidebar a { text-decoration: none; }
.sidebar a.active { font-weight: 600; }
.sidebar details { margin: 0.2rem 0; }
.sidebar summary { cursor: pointer; }
.content {
    flex: 1;
    max-width: var(--max-width);
    padding: calc(var(--space) * 1.2);
}

@media (prefers-color-scheme: light) {
    body { background: #fafafa; color: #222; }
    .sidebar { background: #f0f0f0; }
    a { color: #0645ad; }
    code, pre { background: #f0f0f0; }
    hr { border-color: #ddd; }
}
@media (prefers-color-scheme: dark) {
    body { background: #111; color: #ddd; }
    .sidebar { background: #1a1a1a; }
    a { color: #7bbaff; }
    code, pre { background: #222; }
    hr { border-color: #333; }
}

p, ul, ol, blockquote, pre, table {
    margin: var(--space) 0;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.25;
    margin: calc(var(--space) * 1.6) 0 var(--space);
    font-weight: 600;
}

h1 {
    font-size: 1.8rem;
}

h2 {
    font-size: 1.45rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1.1rem;
}

h5, h6 {
    font-size: 1rem;
}

ul, ol {
    padding-inline-start: 1.4rem;
    margin-block-start: var(--space);
}

li {
    margin: 0.3rem 0;
}

code, pre {
    font-family: var(--font-mono) monospace;
    font-size: 0.9rem;
    border-radius: var(--radius);
}

pre {
    padding: 0.75rem 1rem;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

th, td {
    padding: 0.5rem 0.75rem;
    border: 1px solid currentcolor;
}

th {
    font-weight: 600;
}

blockquote {
    padding: 0.75rem 1rem;
    border-inline-start: 4px solid currentcolor;
    opacity: 0.9;
}

img, video {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius);
    margin: var(--space) 0;
}

hr {
    margin: calc(var(--space) * 2) 0;
    border: none;
    border-bottom: 1px solid;
    opacity: 0.2;
}