:root {
    color-scheme: dark;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: #0b1020;
    color: #e5e7eb;
}

* { box-sizing: border-box; }

body {
    min-height: 100vh;
    margin: 0;
    display: grid;
    place-items: center;
    padding: 24px;
}

main {
    width: 100%;
    max-width: 680px;
    padding: 56px 40px;
    background: #111827;
    border: 1px solid #263449;
    border-radius: 16px;
    text-align: center;
}

.label {
    color: var(--accent);
    font-family: monospace;
    letter-spacing: 3px;
    text-transform: uppercase;
}

h1 {
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    margin: 24px 0;
    color: var(--accent);
}

p {
    color: #9ca3af;
    font-size: 1.1rem;
    line-height: 1.7;
}

footer {
    margin-top: 48px;
    font-family: monospace;
    font-size: .85rem;
    color: #64748b;
}

@media (max-width: 600px) {
    main { padding: 40px 24px; }
}