.navbar.navbar-dark { background: #452c65 linear-gradient(60deg, #003295, #a32525) }
.navbar.navbar-dark::before {
    content: '';
    display: block;
    position: absolute;
    z-index: -1;
    left: 0;
    width: 100%;
    max-width: 418px;
    height: 54px;
    background: url('/images/holiday/4th-july.png') no-repeat 0 0;
}
#sidebar .nav-item.sidebar-collapse a, #sidebar .nav-item.sidebar-collapse a:hover, #sidebar .nav-item.sidebar-collapse a:active { background-color: #42418b }