.keyboard{position:relative}
.key-label{position:absolute;width:100%;height:18px;border-top:1px solid #b9b7af;border-bottom:0;color:#3b3c3f;font-size:.51rem;padding:2px 3px}
.grid{background-size:calc(100% / 16) 100%,25% 100%,100% calc(100% / 24)}