.line{
    display: block;
    position: absolute;
    background-color: #222222;
    height: 1px;
    width: 1px;
    transition: opacity 0.1s, width 1s, height 1s;
    z-index: 1;
}

.line.reveal{
    opacity: 0;
}

.line.horizontal.active{
    width: 100%;
    opacity: 1;
}

.line.vertical.active{
    height: 100%;
    opacity: 1;
}

.line.right{
    right: 0;
}

.line.left{
    left: 0;
}

.line.top{
    top: 0;
}

.line.bottom{
    bottom: 0;
}

.menu-mobile-open header .line{
    display: none;
}