:root{color-scheme:dark}
body{margin:0;min-height:100vh;display:grid;place-items:center;background:radial-gradient(ellipse at 30% 20%,#14204a 0,#070b1a 55%,#03050d 100%);font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:#e6ebf5}
.box{width:min(92vw,360px);padding:2rem;border:1px solid #243056;border-radius:14px;background:#0b1226cc}
h1{font-size:1.25rem;margin:0 0 .25rem}.sub{margin:0 0 1.5rem;color:#8b97b8;font-size:.9rem}
label{display:block;font-size:.8rem;color:#8b97b8;margin-bottom:.35rem}
input{width:100%;box-sizing:border-box;padding:.65rem .75rem;border-radius:8px;border:1px solid #2b3a6b;background:#050914;color:inherit;font-size:1rem}
button{margin-top:1rem;width:100%;padding:.7rem;border:0;border-radius:8px;background:#4f7cff;color:#fff;font-weight:600;font-size:1rem;cursor:pointer}
button:hover{background:#6a90ff}#err{color:#ff8a8a;min-height:1.2em;font-size:.85rem}
.back{display:inline-block;margin-top:1rem;color:#8b97b8;font-size:.85rem;text-decoration:none}