.glow-on-hover{width:250px;height:50px;border:none;outline:none;color:#fff;background:#111;cursor:pointer;position:relative;z-index:0;border-radius:10px}.glow-on-hover:before{content:'';background:linear-gradient(45deg,#ff0000,#ff7300,#fffb00,#48ff00,#00ffd5,#002bff,#7a00ff,#ff00c8,#ff0000);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;transition:opacity .3s ease-in-out;border-radius:10px}.glow-on-hover:active{color:#000}.glow-on-hover:active:after{background:transparent}.glow-on-hover:hover:before{opacity:1}.glow-on-hover:after{z-index:-1;content:'';position:absolute;width:100%;height:100%;background:#111;left:0;top:0;border-radius:10px}@keyframes glowing{0%{background-position:0 0}50%{background-position:400% 0}100%{background-position:0 0}}