<!DOCTYPE html>
<html>
<head>
<title>Заголовок документа</title>
<style>
.grid-container {
display: grid;
grid-template-columns: auto auto auto;
background-color: #ccc;
padding: 10px;
}
.grid-box {
background-color: #eee;
border: 1px solid rgba(0, 0, 0, 0.8);
padding: 30px;
font-size: 30px;
text-align: center;
}
</style>
</head>
<body>
<h2>Пример свойства grid</h2>
<div class="grid-container">
<div class="grid-box">1</div>
<div class="grid-box">2</div>
<div class="grid-box">3</div>
<div class="grid-box">4</div>
<div class="grid-box">5</div>
<div class="grid-box">6</div>
<div class="grid-box">7</div>
<div class="grid-box">8</div>
<div class="grid-box">9</div>
</div>
</body>
</html>