ul, ol {
     margin-bottom: 0;
}

*, *:before, *:after{
    -webkit-box-sizing: content-box;
    -moz-box-sizing: content-box;
    box-sizing: content-box;
}
.topbar-body:hover .topbar-box{
    background-color: #373D41;
}

.topbar-body .topbar-box{
    transition: background-color 0.2s;
}