HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <title>display: grid</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 16px;
      color: #0f172a;
    }

    p {
      margin: 0 0 12px;
      max-width: 40rem;
      line-height: 1.5;
    }

    .board {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 8px;
      max-width: 18rem;
    }

    .board span {
      padding: 8px 12px;
      border: 1px solid #93c5fd;
      background: #eff6ff;
      text-align: center;
    }
  </style>
</head>
<body>
  <p><strong>display: grid</strong> lays children into columns.</p>
  <div class="board">
    <span>1</span>
    <span>2</span>
    <span>3</span>
  </div>
</body>
</html>

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CSS display Property — grid