body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0f172a;
    color: #f8fafc;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
}

.container {
    max-width: 600px;
    padding: 2rem;
}

h1 {
    font-size: 3rem;
    color: #38bdf8;
    margin-bottom: 0.5rem;
}

p {
    font-size: 1.2rem;
    line-height: 1.6;
    color: #94a3b8;
}

.btn {
    display: inline-block;
    margin-top: 2rem;
    padding: 0.75rem 1.5rem;
    background-color: #38bdf8;
    color: #0f172a;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s ease;
}

.btn:hover {
    background-color: #7dd3fc;
}

footer {
    margin-top: 3rem;
    font-size: 0.9rem;
    opacity: 0.6;
}