:root{--bg: #f8fafc;--fg: #0f172a;--muted: #475569;--card: #ffffff;--border: #e2e8f0;--accent: #2563eb;--code-bg: #f1f5f9}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased}.container{max-width:720px;margin:0 auto;padding:4rem 1.5rem 6rem}h1{font-size:1.75rem;margin:0 0 .25rem}.subtitle{margin:0 0 2rem;color:var(--muted)}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:1.25rem 1.5rem;margin-bottom:1.25rem}.card h2{margin:0 0 .75rem;font-size:1rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}ul{margin:0;padding-left:1.1rem;line-height:1.8}a{color:var(--accent);text-decoration:none;font-weight:500}a:hover{text-decoration:underline}code{background:var(--code-bg);padding:.1rem .4rem;border-radius:4px;font-size:.92em;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}footer{margin-top:2.5rem;color:var(--muted);font-size:.92rem;line-height:1.6}