.sudokugrid{display:grid;gap:0;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);border:black solid 9px!important;margin-top:10px;height:90vh;aspect-ratio:1}.numbersquare{box-sizing:border-box;width:100%;border:black solid 1px;background-color:#fff}.innerrightedge{border-right:black solid 3px}.innerbottomedge{border-bottom:black solid 3px}input{text-align:center}input::-webkit-outer-spin-button,input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield}body{display:flex;align-items:center;justify-content:center;background-color:#adff2f;margin:0;height:100%}.buttongrid{display:grid;gap:0;grid-template-columns:repeat(1,1fr);grid-template-rows:repeat(1,1fr);margin-top:2px;height:6vh;width:100%}