*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
}

.card {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 1rem;
    padding: 2.5rem 3rem;
    max-width: 480px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #f8fafc;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.badge {
    display: inline-block;
    background: #0ea5e9;
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    margin-bottom: 1.5rem;
}

p {
    color: #94a3b8;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

a.btn {
    display: block;
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: opacity 0.15s;
}

    a.btn:hover {
        opacity: 0.85;
    }

a.btn-primary {
    background: #0ea5e9;
    color: #fff;
}

a.btn-secondary {
    background: #1e293b;
    color: #cbd5e1;
    border: 1px solid #475569;
}

footer {
    font-size: 0.75rem;
    color: #475569;
}