/** sider **/
.sidebar {
    font-size: 15px;
    background-color: #fff;
    width: 20rem;
    position: fixed;
    z-index: 10;
    margin: 0;
    top: 3.6rem;
    right: 0;
    bottom: 0;
    box-sizing: border-box;
    border-left: 1px solid #eaecef;
    overflow-y: auto;
}

.sidebar .sidebar-links {
    padding: 1.5rem 0;
}

.sidebar ul {
    padding: 0;
    margin: 0;
    list-style-type: none;
}

.sidebar ol, p, ul {
    line-height: 1.7;
}

.sidebar-group:not(.collapsable) .sidebar-heading {
    cursor: auto;
    color: inherit;
}

.sidebar-heading {
    color: #999;
    transition: color .15s ease;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 700;
    padding: 0 1.5rem;
    margin-top: 0;
    margin-bottom: .5rem;
}

.sidebar-group-items {
    transition: height .1s ease-out;
    overflow: hidden;
}

.sidebar-group a.sidebar-link {
    /*padding-left: 2rem;*/
}

a.sidebar-link {
    font-weight: 400;
    display: inline-block;
    color: #2c3e50;
    border-left: .25rem solid transparent;
    padding: .35rem 1rem .35rem 1.25rem;
    line-height: 1.4;
    width: 100%;
    box-sizing: border-box;
}

.sidebar .sidebar-sub-headers {
    padding-left: 1rem;
    font-size: .95em;
}

.sidebar-sub-headers a.sidebar-link {
    padding-top: .25rem;
    padding-bottom: .25rem;
    border-left: none;
}

.selected {
    color: #fff !important;
    background-color: red;
    padding: 2px 8px;
    border-radius: 9px;
}