html {
    position: relative;
}

body {
    background: #99ccff;
    color: #000;
}

.image-box {
    position: relative;
    height: 300px;
    margin-top: 1rem;
    margin-bottom: 1rem;
}

.image-box img {
    width: auto;
    height: auto;
    max-height: 100%;
    max-width: 100%;
    margin: auto;
    position: absolute;  
    top: 0;  
    bottom: 0;  
    left: 0;  
    right: 0;
}

.container {
    margin-top: 3rem;
    margin-bottom: 3rem;
}

.sidebar {
    display: none;
}

.sidebar li {
    list-style: none;
}

a:link, a:visited { text-decoration: none; color: #216108;	}
a:hover, a:active { text-decoration: underline; color: #df7401; }

.question-answer {
    margin-top: 3rem;
    margin-bottom: 3rem;
}

.date {
    font-style: italic;
}

#main-sidebar {
    display: block;
}

.extra1 {
    position: absolute;
    left: 0;
    bottom: 0;
    z-index: -1;
    width: 100%;
    height: 100%;
    background-image: url(../images/cloud-horizon.jpg);
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    opacity: 0.3;
}

.button-go-back {

    margin-bottom: 3rem;
}

.footnote {
    font-size: 1rem;
}

.footnote-header {
    font-size: 1.2rem;
}

pre.syntaxbox {
    font-family: monospace;
    border-left: 4px solid #ccc;
    background-color: #99ccee;
    padding: 8px 16px; 
    margin-left: 20px;
    margin-right: 20px;
    overflow-x: auto;
}

/* Bigger than 550 */
@media (min-width: 550px) {
    .sidebar {
        display: block;
    }
    .button-go-back {
        display: none;
    }
}