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 justify-self Auto Example</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
      line-height: 1.6;
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      justify-items: center;
      padding: 1rem;
      border: 2px dashed #94a3b8;
      border-radius: 0.5rem;
      background: #f8fafc;
    }

    .item {
      inline-size: 4rem;
      padding: 0.75rem;
      border-radius: 0.35rem;
      font-weight: 600;
      color: #166534;
      background: #86efac;
      text-align: center;
    }

    .custom {
      justify-self: start;
    }

    .auto {
      justify-self: auto;
    }
  </style>
</head>
<body>
  <h1>auto vs Explicit Override</h1>
  <p>Items with <code>auto</code> follow <code>justify-items: center</code>. The custom item overrides to start.</p>
  <div class="grid">
    <div class="item auto">Auto</div>
    <div class="item auto">Auto</div>
    <div class="item custom">Start</div>
  </div>
</body>
</html>

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CSS justify-self Property - auto