.auth-bg{position:relative;min-height:100vh;overflow:hidden;background:#f9fbfc}.auth-bg:before{content:"";position:absolute;top:0;left:0;width:200%;height:100%;background:url(../bg-lines.png) repeat-x;background-size:auto 100%;animation:slideBg 100s linear infinite;z-index:0}.auth-bg>*{position:relative;z-index:1}@keyframes slideBg{0%{transform:translate(-50%)}to{transform:translate(0)}}