*{box-sizing:border-box;margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto}
html,body{height:100%}
body{display:grid;place-items:center;background:#f6f8fa}
main{width:320px;padding:24px;border-radius:8px;background:#fff;box-shadow:0 6px 20px rgba(10,10,10,0.08);text-align:center}
h1{font-size:1.25rem;margin-bottom:12px}
form{display:flex;gap:8px;justify-content:center}
input[type=password]{flex:1;padding:8px 10px;border:1px solid #ddd;border-radius:6px}
button{padding:8px 12px;border-radius:6px;border:none;background:#0366d6;color:#fff}
.hint{margin-top:12px;color:#666;font-size:0.9rem}