.card{--start:0;--gradient:linear-gradient(to right,#fff,#fff);transition:border-color 1s ease-in-out;position:relative;overflow:hidden}.card:before{content:"";background:var(--gradient);width:100%;height:100%;-webkit-mask:linear-gradient(#0000,#0000),conic-gradient(from calc((var(--start) - 15)*1deg),#ffffff1f 0deg,white,#fff0 100deg);mask:linear-gradient(#0000,#0000),conic-gradient(from calc((var(--start) - 15)*1deg),#ffffff1f 0deg,white,#fff0 100deg);opacity:0;background-attachment:fixed;border:2px solid #0000;border-radius:12px;transition:all .5s;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);-webkit-mask-clip:padding-box,border-box;mask-clip:padding-box,border-box;-webkit-mask-composite:source-in;mask-composite:intersect}.glow{pointer-events:none;filter:saturate(200);width:100%;height:100%;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.card:hover:before{opacity:1}