.sidebtns{display:flex;flex-wrap:wrap;justify-content:space-between}.sidebtn{flex:0 0 47.5%}.sidebtn_link{display:block;position:relative}.sidebtn_link:after{background-color:rgba(0,0,0,.1);content:"";height:100%;left:0;opacity:0;position:absolute;top:0;transition:opacity .3s;width:100%}.sidebtn_link:hover:after{opacity:1}