marquee:before,marquee:after{position:absolute;top:0;width:20rem;height:100%;content:"";z-index:1}marquee:before{left:0;background:linear-gradient(to right,#000 0%,transparent 100%)}marquee:after{right:0;background:linear-gradient(to left,#000 0%,transparent 100%)}@media (max-width:600px){marquee:before,marquee:after{width:5rem}}