This won't center.


Please see attached. This won't center. I need to do it via class not ID.
Computer GuyAsked:
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RobOwner (Aidellio)Commented:

display: block;


.test-header {
  font-family: 'Arial Narrow', Arial, sans-serif;
 display: block;

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Computer GuyAuthor Commented:
What is the theory behind that?
RobOwner (Aidellio)Commented:
a span element is an inline element, not a bock element. by forcing it to be a bock element you have control over its positioning.
RobOwner (Aidellio)Commented:
These articles from the MDN reference can explain it better than me.  It's more about what a span element isn't rather than is when it comes to a Block-level element.
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