body{background-color:#000;margin:0;padding:0}.custom-block{background:#000;border-radius:10px;width:auto;height:auto;margin:auto;position:relative}.custom-block:before{content:"";z-index:-1;background:linear-gradient(45deg,#fb0094,#00f,#0f0,#ff0,red,#fb0094,#00f,#0f0,#ff0,red) 0 0/400%;border-radius:10px;width:calc(100% + 4px);height:calc(100% + 4px);animation:20s linear infinite steam;position:absolute;top:-2px;left:-2px}.custom-block:after{content:"";z-index:-1;background:#000;border-radius:8px;width:100%;height:100%;position:absolute;top:0;left:0}@keyframes steam{0%{background-position:0 0}50%{background-position:400% 0}to{background-position:0 0}}.gradient-text{background:linear-gradient(45deg,#fb0094,#00f,#0f0,#ff0,red,#fb0094,#00f,#0f0,#ff0,red) 0 0/400%;-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;animation:20s linear infinite steam}