.header{animation:gradient 12s ease infinite;background:linear-gradient(45deg,#efeef6,#efeef6,#7e1ef8);background-size:200% 200%}@keyframes gradient{0%{background-position:0 50%}50%{background-position:100% 50%}to{background-position:0 50%}}.center-stack{left:50%;top:50%;transform:translate(-50%,-50%)}