/* Center the entire page */
#container {
    width: 80%;
    margin-left: auto;
    margin-right: auto;
    font-family: Arial, sans-serif;
}

/* Header */
#header {
    background-color: #4CAF50;
    color: white;
    padding: 20px;
    text-align: center;
}

/* Navigation links */
#nav {
    background-color: #333;
    padding: 10px;
    text-align: center;
}

#nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

#nav a:hover {
    color: #4CAF50;
}

/* Content area */
#content {
    width: 65%;
    float: left;
    padding: 20px;
    background-color: #f4f4f4;
}

/* Sidebar */
#sidebar {
    width: 30%;
    float: right;
    padding: 20px;
    background-color: #ddd;
}

/* Footer */
#footer {
    clear: both;
    background-color: #222;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 10px;
}

/* MEDIA QUERY (Responsive Design) */
@media screen and (max-width: 768px) {
    #content, #sidebar {
        float: none;
        width: 100%;
    }

    #nav a {
        display: block;
        margin: 10px 0;
    }
}