website/src/cosmo/css/base.css

body {
    padding-top: 70px;
}

ul.nav .main {
    font-weight: bold;
}

.col-md-3 {
    padding-left: 0;
}

.col-md-9 {
    padding-bottom: 100px;
}

.source-links {
    float: right;
}

.col-md-9 img {
    max-width: 100%;
}

/*
 * The code below adds some padding to the top of the current anchor target so
 * that, when navigating to it, the header isn't hidden by the navbar at the
 * top. This is especially complicated because we want to *remove* the padding
 * after navigation so that hovering over the header shows the permalink icon
 * correctly. Thus, we create a CSS animation to remove the extra padding after
 * a second. We have two animations so that navigating to an anchor within the
 * page always restarts the animation.
 *
 * See <https://github.com/mkdocs/mkdocs/issues/843> for more details.
 */
:target::before {
    content: "";
    display: block;
    margin-top: -75px;
    height: 75px;
    pointer-events: none;
    animation: 0s 1s forwards collapse-anchor-padding-1;
}

.clicky :target::before {
    animation-name: collapse-anchor-padding-2;
}

@keyframes collapse-anchor-padding-1 {
    to {
        margin-top: 0;
        height: 0;
    }
}

@keyframes collapse-anchor-padding-2 {
    to {
        margin-top: 0;
        height: 0;
    }
}

code {
    padding: 1px 3px;
    background: #f5f5f5;
    border: solid 1px #ccc;
    color: #333;
}

pre code {
    background: transparent;
    border: none;
}

a code {
    color: #007fff;
}

a:hover code, a:focus code {
    color: #0059b3;
}

kbd {
    padding: 2px 4px;
    font-size: 90%;
    color: #fff;
    background-color: #333;
    border-radius: 3px;
    -webkit-box-shadow: inset 0 -1px 0 rgba(0,0,0,.25);
    box-shadow: inset 0 -1px 0 rgba(0,0,0,.25);
}

footer {
    margin-top: 30px;
    margin-bottom: 10px;
    text-align: center;
    font-weight: 200;
}

.modal-dialog {
    margin-top: 60px;
}

/* Style the admonitions. */

.admonition {
    margin-bottom: 21px;
    border: 1px solid #ddd;
}

.admonition > .admonition-title {
    margin: 0;
    padding: 10px 15px;
    border-bottom: 1px solid #ddd;
    color: #333;
    background-color: #f5f5f5;
    font-size: 17px;
    font-weight: 300;
    line-height: 1.1;
}

.admonition > * {
    margin-left: 15px;
    margin-right: 15px;
}

.admonition > *:not(.admonition-title):first-of-type,
.admonition > .admonition-title + * {
    margin-top: 15px;
}

.admonition > *:last-child {
    margin-bottom: 15px;
}

/* Style each kind of admonition. */

.admonition.note, .admonition.note > .admonition-title {
    border-color: #7643a8;
}

.admonition.note > .admonition-title {
    color: #fff;
    background-color: #9954bb;
}

.admonition.warning, .admonition.warning > .admonition-title {
    border-color: #ff4309;
}

.admonition.warning > .admonition-title {
    color: #fff;
    background-color: #ff7518;
}

.admonition.danger, .admonition.danger > .admonition-title {
    border-color: #f0005e;
}

.admonition.danger > .admonition-title {
    color: #fff;
    background-color: #ff0039;
}

/*
 * Side navigation
 *
 * Scrollspy and affixed enhanced navigation to highlight sections and secondary
 * sections of docs content.
 */

/* By default it's not affixed in mobile views, so undo that */
.bs-sidebar.affix {
    position: static;
}

.bs-sidebar.well {
    padding: 0;
}

/* First level of nav */
.bs-sidenav {
    margin-top: 30px;
    margin-bottom: 30px;
    padding-top:    10px;
    padding-bottom: 10px;
    border-radius: 5px;
}

/* All levels of nav */
.bs-sidebar .nav > li > a {
    display: block;
    padding: 5px 20px;
    z-index: 1;
}
.bs-sidebar .nav > li > a:hover,
.bs-sidebar .nav > li > a:focus {
    text-decoration: none;
    border-right: 1px solid;
}
.bs-sidebar .nav > .active > a,
.bs-sidebar .nav > .active:hover > a,
.bs-sidebar .nav > .active:focus > a {
    font-weight: bold;
    background-color: transparent;
    border-right: 1px solid;
}

/* Nav: second level (shown on .active) */
.bs-sidebar .nav .nav {
    display: none; /* Hide by default, but at >768px, show it */
    margin-bottom: 8px;
}
.bs-sidebar .nav .nav > li > a {
    padding-top:    3px;
    padding-bottom: 3px;
    padding-left: 30px;
    font-size: 90%;
}

/* Show and affix the side nav when space allows it */
@media (min-width: 992px) {
    .bs-sidebar .nav > .active > ul {
        display: block;
    }
    /* Widen the fixed sidebar */
    .bs-sidebar.affix,
    .bs-sidebar.affix-bottom {
        width: 213px;
    }
    .bs-sidebar.affix {
        position: fixed; /* Undo the static from mobile first approach */
        top: 80px;
    }
    .bs-sidebar.affix-bottom {
        position: absolute; /* Undo the static from mobile first approach */
    }
    .bs-sidebar.affix-bottom .bs-sidenav,
    .bs-sidebar.affix .bs-sidenav {
        margin-top: 0;
        margin-bottom: 0;
    }
}
@media (min-width: 1200px) {
    /* Widen the fixed sidebar again */
    .bs-sidebar.affix-bottom,
    .bs-sidebar.affix {
        width: 263px;
    }
}

.headerlink {
    display: none;
    padding-left: .5em;
}

h1:hover .headerlink, h2:hover .headerlink, h3:hover .headerlink, h4:hover .headerlink, h5:hover .headerlink, h6:hover .headerlink{
    display:inline-block;
}

/* display submenu relative to parent*/
.dropdown-submenu {
    position: relative;
}

/* sub menu stlye */
.dropdown-submenu>.dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: 0px;
    margin-left: -1px;
}

/* display sub menu on hover*/
.dropdown-submenu:hover>.dropdown-menu {
    display: block;
}

/* little arrow */
.dropdown-submenu>a:after {
    display: block;
    content: " ";
    float: right;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
    border-width: 5px 0 5px 5px;
    border-left-color: #999999;
    margin-top: 5px;
    margin-right: -10px;
}

/* little arrow of parent menu */
.dropdown-submenu:hover>a:after {
    border-left-color: #404040;
}