body {
    background: linear-gradient(to bottom, #e0f7fa, #ffffff);
    font-family: Arial, sans-serif;
    text-align: center;
    padding: 50px;
}
.container {
    background: #ffffffcc;
    padding: 30px;
    border-radius: 10px;
    display: inline-block;
}
.btn {
    display: inline-block;
    padding: 10px 20px;
    background: #00bcd4;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
}