.your-column-class{position:relative;border-radius:12px;padding:8px;background:#fff;z-index:1}.your-column-class::before{content:"";position:absolute;inset:0;border-radius:12px;padding:2px;background:linear-gradient(180deg,#87CEEB,#800080,#87CEEB);background-size:400% 400%;-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;animation:borderGradient 6s ease infinite;z-index:-1}@keyframes borderGradient{0%{background-position:50% 100%}50%{background-position:50% 0%}100%{background-position:50% 100%}}