*{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,sans-serif;color:#1a1a1a;background:#fafafa;line-height:1.6}main{max-width:720px;margin:0 auto;padding:3rem 1.5rem}button{font:inherit;cursor:pointer;border:none;border-radius:8px;padding:.75rem 1.5rem}