.aurora-background-gradient-after:after{background-attachment:fixed;background-image:var(--dark-gradient),var(--aurora);background-size:200%,100%;content:"";inset:0;mix-blend-mode:difference;position:absolute}.aurora-gradient-animation:after{animation:animate-aurora 60s linear infinite}@keyframes animate-aurora{0%{background-position:50% 50%,50% 50%}to{background-position:350% 50%,350% 50%}}