#sidebar_wrapper {
    z-index: 1;
    width: 0;
    height: 300%;
    position: absolute;
    overflow-y: hidden;
    background: #000;
    opacity: 0.9;
    left: 0;
    transition: 0.5s;
}

#main_content_wrapper {
    width: 100%;
    position: relative;
    padding: 2px;
    transition: margin-left 0.5s
}

#wrapper.menuDisplayed #sidebar_wrapper {
    width: 250px;
}

#wrapper.menuDisplayed #main_content_wrapper {
    padding-left: 250px;
}

#sidebar_wrapper .closeBtn {
    font-size: 36px;
    margin-left: 200px;
    text-decoration: none;
    color: #d3d3d3;
}

.sidebar_nav {
    list-style: none;
    padding: 0;
}

.sidebar_nav li {
    text-indent: 20px;
    line-height: 40px;
}

.sidebar_nav li a {
    text-decoration: none;
    color: #ddd;
    display: block;
}

.sidebar_nav li a:hover {
    background: #d3d3d3;
}