* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

body {
    display: grid;
    place-items: center;
    background: #0b1220;
    color: #e6edf3;
}

main {
    width: min(720px, 92vw);
    padding: 2rem;
    border: 1px solid #1f2937;
    border-radius: 12px;
    background: #111827;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

h1 {
    margin-top: 0;
    color: #7dd3fc;
}

button {
    background: #2563eb;
    color: white;
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

.muted {
    color: #9ca3af;
}