html - Extra padding in CSS-based navigation -


i'm having issues css based navigation came with. reason there's small amount of padding (3px or so) between each navigation item, right of vertical line. also, in firefox white :hover offset making looked more tabbed navigation when mouse on it. here's jsfiddle:

https://jsfiddle.net/9m24tf4a/7/

on side note, there simple way have vertical lines take 90% of height instead?

html:

<div id="header_nav">     <ul>         <li><a href="#" class="first">home</a></li>         <li><a href="#">link 2</a></li>         <li><a href="#">link 3</a></li>         <li><a href="#">link 4</a></li>         <li><a href="#">link 5</a></li>         <li><a href="#">link 6</a></li>     </ul> </div>

css:

#header_nav { margin: 0px; padding: 0px; clear: both; height: 36px; background-color: #ccc; border-top: 1px solid #b6b2a9; border-bottom: 1px solid #b6b2a9; } #header_nav ul { width: 1000px; padding: 0px; line-height: 36px; margin: 0px 100px 0px 100px; } #header_nav ul li { list-style-type: none; display: inline-block; font: 14px/36px 'arial', sans-serif; color: #555559; height: 36px; line-height: 36px; padding: 0px; margin: 0px; width: auto; border-right: 1px solid #b6b2a9; } #header_nav ul li:hover { background-color: #fff; width: auto; } #header_nav ul li { font: 14px/36px 'arial', sans-serif; color: #555559; text-decoration: none; line-height: 36px; margin: 0 17px; padding: 0px; } #header_nav ul li.first { /* border-left: 1px solid #b6b2a9; */ /* margin-left: 0px; */ }

there's known padding generated li elements displayed inline. either work float: left, either set font-size: 0 ul element, come , set desired font-size li element itself.

here's snippet font-size: 0; ul element.

#header_nav {  margin: 0px;  padding: 0px;  clear: both;  height: 36px;  background-color: #ccc;  border-top: 1px solid #b6b2a9;  border-bottom: 1px solid #b6b2a9;  }  #header_nav ul {  width: 1000px;  padding: 0px;  line-height: 36px;  margin: 0px 100px 0px 100px;    font-size: 0;  }  #header_nav ul li {  list-style-type: none;  display: inline-block;  font: 14px/36px 'arial', sans-serif;  color: #555559;  height: 36px;  line-height: 36px;  padding: 0px;  margin: 0px;  width: auto;  border-right: 1px solid #b6b2a9;    font-size: 16px;  }  #header_nav ul li:hover {  background-color: #fff;  width: auto;  }  #header_nav ul li {  font: 14px/36px 'arial', sans-serif;  color: #555559;  text-decoration: none;  line-height: 36px;  margin: 0 17px;  padding: 0px;  }  #header_nav ul li.first {  /* border-left: 1px solid #b6b2a9; */  /* margin-left: 0px; */  }
	<div id="header_nav">  		<ul>  			<li><a href="#" class="first">home</a></li>  			<li><a href="#">link 2</a></li>  			<li><a href="#">link 3</a></li>  			<li><a href="#">link 4</a></li>  			<li><a href="#">link 5</a></li>  			<li><a href="#">link 6</a></li>  		</ul>  	</div>


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