:root{font-family:system-ui,-apple-system,sans-serif}*{box-sizing:border-box}body{margin:0}body.dark{background:#242424;color:#eee}body.dark input{background:#1a1a1a;color:#eee;border:1px solid #444;border-radius:6px}body.light{background:#f4f4f4;color:#1a1a1a}body.light input{background:#fff;color:#1a1a1a;border:1px solid #ccc;border-radius:6px}button{cursor:pointer}