What if CSS had something like [attribute="selectors"] for matching partial tag names

partial-tag-name-matching-selectors.html

<custom-element></custom-element>
<custom-element-1></custom-element-1>
<custom-2-element></custom-2-element>
<custom-element-name></custom-element-name>
<custom-elementname></custom-elementname>

<style>
  /* equals tag name */
  custom-element {}
  
  /* tag name starts with */
  (^custom-) {}
  
  /* tag name ends with */
  ($-element) {}
  
  /* tag name includes */
  (*name) {}
</style>