body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
}
main {
    max-width: 40rem;
    margin: 4rem auto;
    padding: 2rem;
    background: #1e293b;
    border-radius: 12px;
}
.brand {
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #38bdf8;
}
h1 {
    margin-top: 0.25rem;
}
.note {
    color: #94a3b8;
}