Having trouble with the :first-of-type Pseudo Class in CSS?

I have been attempting to style the first link in an li element with a specific font color.

When the li element is clicked, it gains the "open" class.

I've tried using both li a:first-of-type and li a:first-child pseudo-classes to achieve this, but unfortunately, the color ends up applied to all children within the li:

https://i.sstatic.net/6mhz9.png

How can I use CSS to only apply the color to the first child? Specifically, in this case, "Section 2".

li.open a:first-of-type {
  color: blue !important;
}
<ul>
  <li>
    <a href="#">Section 1</a>
    <ul class="off-canvas__nav-sub">
      <li><a href="#">Sub page 1</a></li>
      <li><a href="#">Sub page 2</a></li>
      <li><a href="#">Sub page 3</a></li>
    </ul>
  </li>
  <li class="open">
    <a href="#">Section 2</a>
    <ul class="off-canvas__nav-sub">
      <li><a href="#">Sub page 1</a></li>
      <li><a href="#">Sub page 2</a></li>
      <li><a href="#">Sub page 3</a></li>
    </ul>
  </li>
  <li>
    <a href="#">Section 3</a>
  </li>
  <li>
    <a href="#">Section 4</a>
  </li>
  <li>
    <a href="#">Section 5</a>
  </li>
</ul>

Answer №1

All a tags within your HTML document are the first child a element of their parent elements.

To select the a tag that is a direct child of an li with a class of "open", use a child combinator in CSS.

li.open > a {}

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