#sb-wrapper{
    background-color: darkgrey;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%);
}
#sb-body{
    background-color: darkgrey;
}

#sb-player{
    margin: auto;
    right: 0;
    left: 0;
}

#sb-additional-nav {
    z-index: 9999;
    width: 100%;
    height: auto;
    background-color: grey;
    position: absolute;
}

#sb-additional-nav > li {
    list-style: none;
    width: 25%;
    height: auto;
    float: left;

}
#sb-additional-nav > li > a:hover{
    color: #003894;
}

@media screen and (max-width: 737px) {
    #sb-wrapper{
        top: 50% !important;
    }

    #sb-additional-nav {
        height: 20px;
    }
}