/* General styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
}

h3, h4 {
    margin-bottom: 10px;
}

button {
    display: block;
    margin: 10px 0;
    padding: 10px 15px;
    background-color: #007acc;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}