body{color:#222;background:#fafaf7;margin:0;padding:1rem;font-family:system-ui,sans-serif}.center{flex-direction:column;gap:.75rem;max-width:320px;margin:15vh auto 0;display:flex}input{border:1px solid #ccc;border-radius:6px;padding:.6rem;font-size:1rem}button{color:#fff;cursor:pointer;background:#2f6db5;border:none;border-radius:6px;padding:.6rem;font-size:1rem}.err{color:#c0392b;margin:0}