How to remove whitespace from <li> - html

Question

I have this issue, I can't for the life of me try and remove the whitespace in this (li) tag, below I've include a screen capture, what I'm trying to do is remove the white before the grey menu bar, as well make the whole menu bar line up to bottom grey bar.
CSS
.menu ul {
list-style: none;
padding: 0;
margin: 0;
}
.menu li {
float: left;
margin: 0 0.5em 0 0.5em;
left: 0px;
padding: 0;
list-style: none;
}
.menu li a {
float: left;
display: inline-block;
width: 161.3px;
text-decoration: none;
text-align: left;
font-family: 'MyriadPro', sans-serif;
font-size: .875em;
color: #FFF;
height: 1.2em;
}
#MenuGreyBar li a{
display: block;
width: 200px;
list-style: none;
left: 0px;
height: 1.2em;
float: left;
margin: 0;
}
HTML
<div class="menu">
<div>
<ul id="MenuGreyBar">
<li style="left: 0px;">
</li>
</ul>
</div>
<ul>
<li>
About Us
</li>
<li >
Help & Support
</li>
<li >
Law & Information
</li>
<!-- ... There are a few more. -->
</ul>
</div>
The image: (it didn't let me embed)
http://db.tt/tcSr5kGv

Answer 1

I'm not positive if this is your issue, but here's my guess:
.menu li {
float: left;
margin: 0 0.5em 0 0.5em; /* We set a left margin for all menu elements here
which will cause them to jut over. We want this for
most elements*/
left: 0px;
padding: 0;
list-style: none;
}
.menu li a {
float: left;
display: inline-block;
width: 161.3px;
text-decoration: none;
text-align: left;
font-family: 'MyriadPro', sans-serif;
font-size: .875em;
color: #FFF;
height: 1.2em;
}
#MenuGreyBar li a{
display: block;
width: 200px;
list-style: none;
left: 0px;
height: 1.2em;
float: left;
margin: 0; /*The first menu item is special and needs no margin, so we try
to clear it, however we are clearing the anchor element in the li
block, and the margin is applied on the li block itself, so the li
block's margin is rendered before the anchor has any say*/
}
So what we need to do is clear the margin property on the actual li element, this code will do it:
#MenuGreyBar li{
margin: 0;
}
That should do it, my best guess.