.bt-light-box{position:relative}.bt-light-box:before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;background:linear-gradient(35deg,rgba(255,255,255,.6),rgba(255,255,255,.1) 30%,rgba(255,255,255,.1) 70%,rgba(255,255,255,.6));-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);mask-composite:exclude;pointer-events:none;transition:opacity .3s ease}