<!DOCTYPE html>
<html>
<body>
<style>
.grid-container {
display: inline-grid;
grid-template-columns: auto auto auto;
background-color: #2196F3;
padding: 10px;
}
.grid-item {
background-color: rgba(241, 37, 37, 0.8);
border: 1px solid rgba(0, 0, 0, 0.8);
padding: 20px;
font-size: 30px;
text-align: center;
}
</style>
<div class="grid-container">
<div class="grid-item">1</div>
<div class="grid-item">2</div>
<div class="grid-item">3</div>
<div class="grid-item">4</div>
<div class="grid-item">5</div>
<div class="grid-item">6</div>
<div class="grid-item">7</div>
<div class="grid-item">8</div>
<div class="grid-item">9</div>
</div>
</body>
</html>