body{font-family:system-ui;background:#f3f4f6;margin:0;display:grid;place-items:center;min-height:100vh}
.box{width:min(380px,92vw);background:white;padding:28px;border-radius:14px;box-shadow:0 10px 30px #0001}
h1{font-size:22px;margin:0 0 6px}.muted{color:#6b7280;font-size:14px;margin-bottom:22px}
label{display:block;font-size:13px;margin:12px 0 5px}input{width:100%;padding:11px;border:1px solid #d1d5db;border-radius:8px;box-sizing:border-box}
button{margin-top:18px;width:100%;padding:11px;border:0;border-radius:8px;background:#2563eb;color:white;font-weight:700;cursor:pointer}