body {
    font-family: Arial, sans-serif;
    background: #f0f9f7;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 600px;
    margin: 50px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}
.btn, a.btn {
    display: inline-block;
    padding: 10px 20px;
    margin-top: 15px;
    background-color: #2bc4ad;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}
ul {
    list-style: none;
    padding: 0;
}
ul li {
    margin: 10px 0;
}