body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}main{display:grid;place-items:center}.board{display:grid;grid-template-columns:repeat(var(--rows),1fr);width:fit-content;margin-bottom:3rem}.cell{width:2rem;height:2rem;border:1px solid black;display:flex;justify-content:center;user-select:none;background:#999;cursor:pointer;transition:background .5s}.cell span{margin:auto}.cell.revealed,.board.lost .cell{background:#eee;cursor:initial}