*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:#f4fafb;color:#12303a;font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{width:min(92vw,360px);background:#fff;padding:2rem;border-radius:16px;box-shadow:0 8px 30px rgba(0,60,80,.12);border-top:6px solid #e2001a}
h1{margin:0 0 .25rem;font-size:1.4rem}p{margin:.25rem 0 1rem;color:#4a6670}
label{display:block;font-weight:600;margin-bottom:.35rem}
input{width:100%;padding:.8rem 1rem;font-size:1.1rem;border:2px solid #b9d3d9;border-radius:10px}
input:focus{outline:3px solid #00859c;outline-offset:1px;border-color:#00859c}
button{margin-top:1rem;width:100%;padding:.85rem;font-size:1rem;font-weight:700;color:#fff;background:#c4001a;border:0;border-radius:10px;cursor:pointer}
button:hover{background:#a80016}.err{color:#b00020;font-weight:600;margin:1rem 0 0}