body {
    background: #0f172a;
    color: white;
    font-family: Arial;
    text-align: center;
}

.container {
    margin-top: 40px;
}

button {
    display: block;
    margin: 15px auto;
    padding: 15px;
    width: 200px;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    background: #2563eb;
    color: white;
}

    button:hover {
        background: #1d4ed8;
    }