.diagonal1-border{position:absolute;left:0;top:0;width:100%;height:100%;overflow:hidden}.diagonal1-border::before,.diagonal1-border::after{content:"";position:absolute;width:40%;height:40%;z-index:0}.diagonal1-border::before{inset:0 0 auto auto}.diagonal1-border::after{inset:auto auto 0 0}.diagonal2-border{position:absolute;left:0;top:0;width:100%;height:100%;overflow:hidden}.diagonal2-border::before{content:"";position:absolute;width:150%;height:150%;z-index:0}.diagonal2-border::before{inset:0 auto auto 0;animation:diagonal-border-animation 3s linear infinite}.diagonal2-border::after{inset:auto 0 0 auto;animation:diagonal-border-animation 3s linear infinite}@keyframes diagonal-border-animation{0%,30%{opacity:0}70%{opacity:1}100%{opacity:0}}