html, body {
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #0f172a;
    color: #e5e7eb;
    height: 100%;
}

.wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    box-sizing: border-box;
}

.card {
    max-width: 640px;
    width: 100%;
    background: rgba(15, 23, 42, 0.9);
    border-radius: 1rem;
    padding: 2rem;
    box-sizing: border-box;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    border: 1px solid rgba(148, 163, 184, 0.3);
    text-align: center;
}

.card h1 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.card p {
    margin: 0.5rem 0;
    line-height: 1.5;
    color: #cbd5f5;
}

footer {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: #9ca3af;
    text-align: center;
}