ts3web/public/theme/bootstrap4/css/custom.css

html {
    position: relative;
    min-height: 100%;
}

body {
    padding-top: 5rem;
    margin-bottom: 60px; /* Margin bottom by footer height */
}

@media (min-width: 992px) {
    body {
        padding-top: 56px;
    }
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

.mainContainer {
    margin-top: 1rem;
}

.treeView img {
    display: inline-block;
}

.footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 60px;
    line-height: 60px;
    background-color: #f5f5f5;
}

.footer > .container {
    padding-right: 15px;
    padding-left: 15px;
}

blockquote {
    border-left: 10px solid #ccc;
    margin: 1.5em 10px;
    padding: 0.5em 10px;
    quotes: "\201C""\201D""\2018""\2019";
}
blockquote:before {
    color: #ccc;
    content: open-quote;
    font-size: 4em;
    line-height: 0.1em;
    margin-right: 0.25em;
    vertical-align: -0.4em;
}
blockquote p {
    display: inline;
}