.card_.is-scrolling-down .btn_1{transform:translate3d(0,-110%,0);opacity:0}.card_.is-scrolling-down .btn_2{transform:translate3d(0,0,0);opacity:1}.card_.is-scrolling-up .btn_1{transform:translate3d(0,0,0);opacity:1}.card_.is-scrolling-up .btn_2{transform:translate3d(0,110%,0);opacity:0}