body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: auto;
    padding: 20px;
}

header {
    background-color: #333;
    color: white;
    padding: 10px;
    text-align: center;
}

button {
    background-color: #007BFF;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}