How to load style.css root directory in WordPress page.php, single.php in contents
<p>I am making a WordPress theme. But I have a problem. style.css stylesheet is not loading in page.php contents. When I edit a post in wp editor and add <code>&lt;div class=w3-red"&gt; &lt;button class="w3-btn w3-red"&gt;</code> and more related codes. When I published a post, they are not showing on front-end. I think WordPress doesn't support the page style customization option with wp editor. I have also added my own style.css in header.php.</p>

<p>I am using w3.css stylesheet in my web root directory. style.css</p>

<pre><code>&lt;div class="w3-card w3-red"&gt; Hello &lt;/div&gt;
</code></pre>

<p>This code in not loading in frontend.</p>