w3.css tutorial pdf

<p><strong>Final Tip:</strong> The best offline reference is printing the official W3Schools W3.CSS tutorial via browser print-to-PDF.</p>

<h2>3. Responsive Grid System</h2> <p>W3.CSS uses a 12-column fluid grid:</p> <pre><div class="w3-row"> <div class="w3-col m4 l3" style="background:#ccc">Column</div> <div class="w3-col m8 l9" style="background:#eee">Column</div> </div></pre> <p><strong>Classes:</strong> <code>l1-l12</code> (large screens), <code>m1-m12</code> (medium), <code>s1-s12</code> (small)</p>

<h2>6. Responsive Utilities</h2> <ul> <li><code>w3-hide-small</code> – hide on mobile</li> <li><code>w3-hide-medium</code> – hide on tablet</li> <li><code>w3-hide-large</code> – hide on desktop</li> <li><code>w3-mobile</code> – make block element full width on mobile</li> </ul>

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