body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
    padding: 50px;
}
.container {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    display: inline-block;
}
h1 {
    color: #333;
}
button {
    padding: 10px 20px;
    margin: 10px;
    font-size: 16px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}
.btn-page1 {
    background-color: #007BFF;
    color: white;
}
.btn-page2 {
    background-color: #28a745;
    color: white;
}
.btn-page3 {
    background-color: #ff0000;
    color: white;
}
button:hover {
    opacity: 0.8;
}