HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS grid-template-areas Empty Cell Example</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
      line-height: 1.6;
    }

    .grid {
      display: grid;
      grid-template-areas:
        ". nav nav"
        "aside content content";
      grid-template-columns: 5rem 1fr 1fr;
      gap: 10px;
      max-width: 32rem;
      min-height: 160px;
    }

    .nav { grid-area: nav; background: #93c5fd; color: #1e3a5f; }
    .aside { grid-area: aside; background: #bbf7d0; color: #166534; }
    .content { grid-area: content; background: #fde68a; color: #78350f; }

    .grid > div {
      padding: 1rem;
      text-align: center;
      border-radius: 0.35rem;
      font-weight: 600;
    }
  </style>
</head>
<body>
  <h1>Empty Cell with Dot</h1>
  <div class="grid">
    <nav class="nav">Navigation</nav>
    <aside class="aside">Aside</aside>
    <main class="content">Content</main>
  </div>
</body>
</html>

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CSS grid-template-areas Property - Empty Cells