*{box-sizing:border-box}body{font:15px Arial,sans-serif;background:#f4f7fa;color:#173042;margin:0;display:grid;place-items:center;min-height:100vh}.card{background:white;padding:35px;width:min(440px,94vw);border:1px solid #dce6ed;border-radius:12px}.brand{color:#1686c5;font-weight:bold;letter-spacing:2px}h1{font-size:24px}p{font-size:13px;color:#627989;line-height:1.6}label{display:block;font-size:13px;margin:20px 0}input{width:100%;display:block;padding:12px;margin-top:8px;border:1px solid #cedae3;border-radius:5px}button{padding:13px 20px;background:#1686c5;color:white;border:0;border-radius:6px;cursor:pointer;width:100%}.error{background:#fff0ed;color:#ac3d28;padding:12px}