button.limit-break{color:#fff;cursor:pointer;z-index:0;background-color:#000;outline:none;position:relative}button.limit-break:before{content:"";z-index:-1;filter:blur(5px);opacity:1;background:linear-gradient(45deg,red,#ff7300,#fffb00,#48ff00,#00ffd5,#002bff,#7a00ff,#ff00c8,red) 0 0/400%;width:calc(100% + 4px);height:calc(100% + 4px);transition:opacity .3s ease-in-out;animation:20s linear infinite glowing;position:absolute;top:-2px;left:-2px}button.limit-break:hover{color:#000;transition:all .25s}button.limit-break:active:after{background:0 0}button.limit-break:after{z-index:-1;content:"";border-radius:10px;width:100%;height:100%;position:absolute;top:0;left:0}@keyframes glowing{0%{background-position:0 0}to{background-position:-400% 0}}