.nav-background {
    height: 250px;
    z-index: 5;
    /* Permalink - use to edit and share this gradient: https://colorzilla.com/gradient-editor/#000000+0,000000+100&0.65+0,0+100;Neutral+Density */
    background: -moz-linear-gradient(top,  rgba(0,0,0,0.65) 0%, rgba(0,0,0,0) 100%); /* FF3.6-15 */
    background: -webkit-linear-gradient(top,  rgba(0,0,0,0.65) 0%,rgba(0,0,0,0) 100%); /* Chrome10-25,Safari5.1-6 */
    background: linear-gradient(to bottom,  rgba(0,0,0,0.65) 0%,rgba(0,0,0,0) 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#a6000000', endColorstr='#00000000',GradientType=0 ); /* IE6-9 */
}