Please look at the code snippet below.
The structure is
<ul>
    <li>text1</li>
    <li> <ul><li> text2 </li>
             <li> text3 </li>
         </ul>
    </li>
</ul>
I have the CSS as follows:
li:hover
{
   background-color: yellow;
}
It works fine for the first li but when I hover over the second item (in the sub-ul), then all items in the sub list are highlighted.
What I need is for a single row to be highlighted at a time, regardless of the relationship of the list item.
I tried
li:child-only:hover
but it did not work. All other answers on S.O. are approaching jQuery to handle this issue. Can this be solved using only CSS?
ul {
  list-style-type: none;
}
li:hover {
  color: blue;
  cursor: pointer;
  background-color: yellow;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<ul>
  <li>Lv1: First Item</li>
  <li>Lv1: Second Item</li>
  <li>
    <ul>
      <li>Lv2: First Item</li>
      <li>
        <ul>
          <li>Lv3: First Item</li>
          <li>Lv3: Second Item</li>
          <li>Lv3: Third Item</li>
        </ul>
      </li>
      <li>Lv2: Second Item</li>
      <li>Lv2: Third Item</li>
    </ul>
  </li>
</ul> 
     
     
     
     
     
     
     
    