body, html {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-image: url('images/cloud.jpg');
    background-size: cover;
    background-attachment: fixed;
}

.container {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 20px;
    margin: 5% auto;
    width: 80%;
    max-width: 500px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

footer {
    text-align: center;
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: #333;
    color: white;
    padding: 10px 0;
}