HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS max-width Comparison</title>
  <style>
    body { font-family: sans-serif; padding: 1.5rem; background: #f8fafc; }
    .row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
    .box { padding: 0.75rem; border-radius: 0.5rem; font-size: 0.85rem; }
    .none { max-width: none; background: #f1f5f9; }
    .sm { max-width: 400px; background: #bfdbfe; }
    .md { max-width: 600px; background: #93c5fd; }
  </style>
</head>
<body>
  <h1>Compare max-width Values</h1>
  <div class="row">
    <div class="box none"><strong>none</strong><p>Spans the full container width.</p></div>
    <div class="box sm"><strong>400px</strong><p>Tighter maximum width cap.</p></div>
    <div class="box md"><strong>600px</strong><p>Roomier maximum width cap.</p></div>
  </div>
</body>
</html>

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CSS max-width Property - Compare Limits