:root { --max: 980px; --fg: #0f172a; --muted: #6b7280; --card: #ffffff; --bg: #f8fafc; }
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji"; color: var(--fg); background: var(--bg); }
.container { max-width: var(--max); margin: 0 auto; padding: 16px; }
.site-header, .site-footer { background: #ffffff; border-bottom: 1px solid #e5e7eb; }
.site-header { position: sticky; top: 0; z-index: 10; }
.site-header h1 { margin: 0; padding: 12px 16px; font-size: 20px; }
.site-header nav { display: flex; gap: 12px; padding: 0 16px 12px; flex-wrap: wrap; }
.site-header a { text-decoration: none; color: #334155; }
.site-footer { margin-top: 24px; padding: 16px; border-top: 1px solid #e5e7eb; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat( auto-fit, minmax(260px, 1fr) ); gap: 16px; }
.card { background: var(--card); border: 1px solid #e5e7eb; border-radius: 16px; padding: 16px; box-shadow: 0 2px 8px rgba(15, 23, 42, .04); }
.card h2 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0 0 8px; color: #475569; }
.tag { display: inline-block; font-size: 12px; color: #0369a1; background: #e0f2fe; padding: 2px 8px; border-radius: 999px; }
.prose h1 { font-size: 28px; margin: 12px 0; }
.prose h2 { font-size: 22px; margin: 20px 0 8px; }
.prose p, .prose li { line-height: 1.7; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.logo { display: inline-block; padding: 12px 16px; color: #334155; text-decoration: none; }