body {
    font-family: Arial, sans-serif;
    background-color: #0f172a;
    color: #e2e8f0;
    margin: 0;
    padding: 0;
    text-align: center;
}

header {
    padding: 60px 20px 20px;
}

h1 {
    font-size: 42px;
    margin: 0;
}

.subtitle {
    color: #94a3b8;
    margin-top: 10px;
}

main {
    padding: 40px 20px;
}

.btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 20px;
    background-color: #3b82f6;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: 0.2s;
}

.btn:hover {
    background-color: #2563eb;
}

footer {
    margin-top: 60px;
    padding: 20px;
    color: #64748b;
}