.bg-mask{perspective:150px;-webkit-mask-image:linear-gradient(to top,rgba(0,0,0,.5),rgba(0,0,0,0));mask-image:linear-gradient(to top,#00000080,#0000);-webkit-mask-size:100% 100%;mask-size:100% 100%;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-position:left top,left bottom;mask-position:left top,left bottom}