<div class="game-board">
<div class="box">X</div>
<div class="box">O</div>
<div class="box">O</div>
<div class="box">O</div>
<div class="box">X</div>
<div class="box">O</div>
<div class="box">O</div>
<div class="box">X</div>
<div class="box">X</div>
</div>
.game-board
{
width: 600px;
height: 600px;
margin: 0 auto;
background-color: #34495e;
color: #fff;
border: 6px solid #2c3e50;
border-radius: 10px;
display: grid;
grid-template: repeat(3, 1fr) / repeat(3, 1fr);
}
.box
{
border: 6px solid #2c3e50;
border-radius: 2px;
font-family: Helvetica;
font-weight: bold;
font-size: 4em;
display: flex;
justify-content: center;
align-items: center;
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.