.wy-nav-content-wrap {
    background-image: url("../img/swan.png");
    background-position: -20px bottom;
    background-size: 20% auto;
    background-repeat: no-repeat;
}

.wy-menu-vertical li.current a:hover {
    color: #fff;
    background: #222;
}
.wy-menu-vertical li.current a {
    color: #999;
    background-color: #222;
    border-right: 0;
}
.wy-menu-vertical li.current > a {
    color: #fff;
    background-color: #1abb9c;
    border-top: 0;
    border-bottom: 0;
}
.wy-menu-vertical li.current > a:hover {
    color: #fff;
    background-color: #1abb9c;
    border-top: 0;
    border-bottom: 0;
}
.wy-side-nav-logo {
    padding: 20px;
    background-color: #fff;
    text-align: center;
}
.wy-side-nav-search {
    margin-bottom: 30px;
}
.wy-side-nav-search input[type=text] {
    border-color: #eee;
}
.wy-menu-vertical li.toctree-l2.current > a {
    background-color: #333;
}
.wy-menu-vertical li.toctree-l2.current > a:hover {
    background-color: #333;
}