body{background:#f7f6f1;color:#18333a;font:17px/1.6 Segoe UI,Arial;margin:0}main{max-width:560px;margin:5vh auto;padding:24px}h1{font:42px Georgia}input{display:block;width:100%;box-sizing:border-box;padding:12px;margin:8px 0 20px;border:1px solid #cbd6c6;border-radius:8px;font:18px Arial}button{padding:12px 18px;background:#265f51;color:white;border:0;border-radius:8px;cursor:pointer}button:disabled{opacity:.6}a{color:#265f51}#error{color:#a43c34}