.overlay {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 40;
    background: rgba(0, 0, 0, 0.5);
}

.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: var(--sidebar-width);
    background: #fff;
    overflow-x: hidden;
    overflow-y: auto;
    z-index: 50;
    box-shadow: 3px 0 15px rgba(0, 0, 0, 0.2);
}

.sidebar a {
    border-bottom: none;
}

.sidebar h3 {
    position: relative;
    margin: 15px 15px 7px;
    padding: 12px 0 8px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    border-bottom: 1px solid var(--title-text-color);
}

.sidebar h3:first-child {
    margin-top: 0;
}

.sidebar_link {
    position: relative;
    padding: 9px 15px;
    text-decoration: none;
    color: #777;
    display: flex;
    align-items: center;
}

.sidebar_link:after {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-color);
    opacity: 0;
    transition: all 300ms;
}

.sidebar_link.active {
    color: var(--title-text-color);
}

.sidebar_link.active:after {
    opacity: 1;
}

.sidebar_link:hover {
    color: #000;
}

.sidebar_link:hover:after {
    opacity: 0.25;
}

.sidebar-icon_wrapper,
.sidebar-icon_wrapper-sub {
    display: inline-block;
    overflow: hidden;
    width: 32px;
    height: 32px;
    margin-right: 15px;
}

.sidebar-icon_wrapper-sub {
    height: 20px;
}

.sidebar-icon,
.sidebar-icon-sub {
    transform: scale(0.6);
    display: block;
    background-color: #fff;
    transform-origin: top left;
}

.sidebar-icon-sub {
    transform: scale(0.37);
    margin-left: 12px;
}

.sidebar_link-sub {
    font-size: 14px;
    padding: 5px 15px;
}

.sidebar_link-sub:before {
    height: 20px;
}

.sidebar_link-sub .nivo-icon {
    height: 20px;
}