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

header {
    background-color: #111;
    color: white;
    padding: 15px;
    text-align: center;
}

.container {
    padding: 20px;
    text-align: center;
}

button {
    padding: 10px 20px;
    border: none;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    border-radius: 5px;
}

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