body{margin:0;display:flex;flex-direction:column;align-items:center;min-width:320px;min-height:100vh}.drawing-box{margin:auto;display:grid;grid-template-columns:repeat(16,min(40px,6vw,6vh));grid-template-rows:repeat(16,min(40px,6vw,6vh));transform:rotate(90deg)}.cell{border:solid 1px black}h1{margin:0;padding:20px}