:root{--bg:#0b0f17;--fg:#e6edf3;--accent:#3b82f6;--muted:#94a3b8;--border:#1f2937}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1100px;margin:0 auto;padding:2rem 1.5rem}nav.topnav{display:flex;flex-wrap:wrap;gap:1rem;padding:1rem 1.5rem;border-bottom:1px solid var(--border)}nav.topnav a{color:var(--fg);font-weight:500}h1{font-size:2rem;margin-bottom:.5rem}.muted{color:var(--muted)}