.bttn--shine:before{content:"";position:absolute;height:150px;width:50px;background:#fff;left:-100px;top:-40px;transform:rotate(37deg);transition:all .3s;opacity:.3;animation:btn 2s linear 0s infinite}.header-scrolled{background:#fff;box-shadow:0 6px 24px rgba(0,0,0,.08)}