body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #0b1d2a, #0f2e44);
    color: white;
}

.container {
    max-width: 900px;
    margin: 80px auto;
    text-align: center;
}

h1 {
    margin-bottom: 30px;
}

.button-card {
    display: block;
    margin: 20px auto;
    padding: 20px;
    width: 300px;
    border-radius: 40px;
    border: 2px solid #00cfff;
    color: white;
    text-decoration: none;
    font-size: 18px;
    background-color: rgba(0, 200, 255, 0.1);
    transition: 0.3s;
}

.button-card:hover {
    background-color: #00cfff;
    color: #0b1d2a;
}

.message {
    font-size: 20px;
    color: #00cfff;
    margin-top: 50px;
}