css - Border-top Extending too far -

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i've got interesting one: testing methods list-item elements of nav bar spread evenly across length of nav. used display:table , display: table cell method spread , seemed work fine.

when went add ::after element add top-bar , have smoother on-hover effect, found bar extended past wanted -- trying have end of words "communication design". thought i'd resize nav container holding list-elements because it's table/table-cell, when nav resizes, list-items shink along , can never shore last element in list.

is there way either affect size of last table cell or show percentage of ::after element?

code:

html:

<h3>test & co.</h3> <p id="title2">communications design</p>  <div id="navcontainer"> <ul>     <li>home</li>     <li>about</li>     <li>work</li>     <li>contact</li> </ul> </div>

css:

* { padding: 0; margin: 0; }  h3 { padding-left: 140px; display: inline-block; padding-top: 10px; padding-bottom: 25px; }  #title2 { display: inline-block; float: right; font-size: 16px; margin-right: 252.5px; padding-top: 14px; padding-bottom: 25px; }  #navcontainer { //border: 1px solid black; width: 643px; margin-left: 140px; height: 30px; background: white; }  #navcontainer ul { list-style:none; display: table; width: 100%; }  #navcontainer ul li { display: table-cell; height: 30px; line-height: 30px; font-family:arial; font-size: 12px; text-align: left; //border: 1px solid black; transition: color .2s ease-in-out; position: relative; }  #navcontainer ul li::after { content: ""; display: block; float: right; position: absolute; margin: auto; height: 1px; top: 0; width: 100%; background: #ccc; transition: background-color .2s ease; }  #navcontainer ul li:hover::after { background: #8c8c8c;  }  #navcontainer ul li:hover { color: #a6cfeb; }


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