div#left_menu{
    position:fixed;
    z-index:100;
    width:160px;
    background-color:white;
}

div#left_menu div.parent {
    font-size:24px;
    height:160px;
    padding-top:30px;
    background-color: #d5dfed;
    border:1px solid silver;
    text-align:center;
}
div#left_menu div.parent div{
    font-size:24px;
}
div#left_menu div.sibling {
    padding-top:10px;
    text-align:center;
    height:50px;
    border-bottom:1px solid silver;
}
div#left_menu div.sibling a{
    text-decoration: none;
    color:black;
    font-size:18px;
}
div#left_menu div.active {
    background-color:#0d4491;
}
div#left_menu div.active a{
    color:white;
}
div#left_menu div.sibling:hover {
    background-color:#0d4491;
}
div#left_menu div.sibling:hover a,div.active{
    color:white;
}
div#left_menu div.accordion div.accordion-item a{
    padding-left:10px;
}
div#left_menu div.accordion div.accordion-collapse a{
    padding-left:30px;
}