:root{color:#1a1a1a;background:#fff;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.6}body{margin:0}main{max-width:640px;margin:2rem auto;padding:0 1rem}h1{font-size:1.8rem}input{border:1px solid #767676;border-radius:6px;padding:.4rem .6rem;font-size:1rem}ul{padding-left:1.2rem}li{margin:.3rem 0}small{color:#595959}