:root{--max:980px}
body{font-family:Arial,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;max-width:var(--max);margin:24px auto;padding:0 12px;line-height:1.8}
header{border-bottom:1px solid #eee;padding:10px 0;margin-bottom:16px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
a{text-decoration:none}
nav a{margin-right:10px}
.card{border:1px solid #eee;border-radius:12px;padding:12px;margin:10px 0}
small{color:#666}