title: CSS width of a <span> tag
body: <p>I use <code>&lt;span&gt;</code> tags in my module titles,
  e.g. </p>
  
  <p><code>&lt;span&gt;Categories&lt;/span&gt;.</code></p>
  
  <p>I specify the span's background color/image, width and height in css.</p>
  
  <p>But the span's width depends on its content/text.</p>
  
  <p>So, if I do <code>&lt;span&gt;&lt;/span&gt;</code>, with just a background image/color in css, nothing appears.</p>
  
  <p>Of course, I want something to appear.</p>
  
  <p>How can I resolve this?</p>