body{width:99vw;height:90vh;display:flex;align-items:center;justify-content:center}.square{width:100px;height:100px;background-color:#fff;border:1px solid black;font-size:24px;display:flex;align-items:center;justify-content:center;cursor:pointer}.board{display:flex;height:400px;justify-content:center;align-items:center;flex-direction:column}.board-row{display:flex}