/* --- General Styles --- */
body {
    font-family: Arial, sans-serif;
    margin: 0; 
    background-color: #f4f4f9;
    color: #333;
    text-align: center;
}

/* --- Header & Footer Styles --- */
#page-header {
    background-color: #34495e;
    color: white;
    padding: 15px 0;
    margin-bottom: 20px;
}

#page-footer {
    padding: 10px 0;
    margin-top: 40px;
    border-top: 1px solid #ccc;
    font-size: 0.9em;
    color: #777;
}

/* --- Main Content Styles --- */
.container {
    max-width: 600px;
    margin: 0 auto; 
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#welcome-message {
    color: #4CAF50; 
    font-size: 1.5em;
    margin-bottom: 20px;
}

#toggle-button {
    padding: 10px 15px;
    font-size: 1em;
    color: white;
    background-color: #007bff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

#content-div {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #e9ecef;
    text-align: middle;
    display: none; /* Initially hidden */
}