.glowing-orb{position:relative;z-index:0;border-radius:50%}.glowing-orb:before{content:"";background:linear-gradient(45deg,red,#ff7300,#fffb00,#48ff00,#00ffd5,#002bff,#7a00ff,#ff00c8,red);position:absolute;top:-2px;left:-2px;background-size:400%;z-index:-1;filter:blur(5px);width:calc(100% + 4px);height:calc(100% + 4px);animation:glowing 20s linear infinite;opacity:1;border-radius:50%;transition:opacity .3s ease-in-out}.glowing-orb:hover:before{opacity:1}.glowing-orb:after{z-index:-1;content:"";position:absolute;width:100%;height:100%;border-radius:50%;left:0;top:0}@keyframes glowing{0%{background-position:0 0}50%{background-position:400% 0}to{background-position:0 0}}