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

#container {
    width: 90%;
    margin-left: auto;
    margin-right: auto;
    background-color: white;
    overflow: auto;
}

#header {
    background-color: #222222;
    color: white;
    text-align: center;
    padding: 30px;
}

#header h1 {
    font-size: 36px;
}

#navigation {
    background-color: #444444;
    padding: 15px;
    text-align: center;
}

#navigation a {
    color: white;
    text-decoration: none;
    padding: 15px;
    font-weight: bold;
}

#navigation a:hover {
    background-color: #777777;
}

#sidebar {
    width: 25%;
    float: left;
    background-color: #dddddd;
    padding: 20px;
    box-sizing: border-box;
    min-height: 500px;
}

#content {
    width: 75%;
    float: left;
    padding: 25px;
    box-sizing: border-box;
}

#content h2 {
    color: #333333;
}

#footer {
    clear: both;
    background-color: #222222;
    color: white;
    text-align: center;
    padding: 20px;
}

/* Media Query */

@media screen and (max-width: 700px) {

    #container {
        width: 100%;
    }

    #sidebar {
        width: 100%;
        float: none;
        min-height: auto;
    }

    #content {
        width: 100%;
        float: none;
    }

    #navigation a {
        display: inline-block;
        padding: 10px;
    }
}