.modal_header{background:linear-gradient(90deg,#1bc8ff,#fec300,#f90,#ba20b4,#1bc8ff);background-size:700% 700%;border-top-left-radius:.38rem;animation:gradient 7s ease-in-out infinite}@keyframes gradient{0%{background-position:0 50%}to{background-position:100% 50%}}.btn{position:relative;overflow:hidden;border-radius:4px;text-decoration:none;border:1px solid hsla(0,0%,100%,.2);color:#f4f4f4;background:transparent}.btn:before{content:"";position:absolute;top:0;width:100%;height:100%;background:linear-gradient(120deg,transparent,hsla(0,0%,100%,.5),transparent)}.btn-anim:before{animation:shine 3.5s ease-in-out infinite}@keyframes shine{0%{left:-100%}13%,to{left:100%}}