.fi-sidebar {
    -webkit-box-shadow: 4px 0px 13px -4px rgba(0,0,0,0.53) !important;
    -moz-box-shadow: 4px 0px 13px -4px rgba(0,0,0,0.53) !important;
    box-shadow: 4px 0px 13px -4px rgba(0,0,0,0.53) !important;
}