:root{color-scheme:light}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1a1a1a;background:#fafafa}a{color:#0a5}main{max-width:720px;margin:0 auto;padding:2rem 1.25rem}button,input,select,textarea{font:inherit}button{cursor:pointer}