Strange Whitespace Under Display:block Element - html

Question

There is some strange whitespace that keeps appearing under all my display: block elements. It's for a meganavigation. I have no idea what is causing this. Basically, I have the code (plus some more that determines the column widths) below, and when it generates the meganav, the items that are rendered as "display:block" have a space below them. You can also see it when hovering over the items in the main navigation as well. I'm not quite sure what to do.
a {
font-family: "Frutiger LT Std 45 Light", sans-serif;
color: black;
text-decoration: none;
font-size: 10px;
display: block;
padding: 3px;
}
a:hover {
text-decoration: none;
color: white;
background-color: #c8a51b;
}
.nav {
background: #1b2c69;
width: 800px;
margin: 10px;
height: 30px;
}
.nav li {
list-style: none;
}
.nav > li {
padding: 0;
float: left;
position: relative;
}
.nav > li > a {
font-family: "Frutiger LT Std 45 Light", sans-serif;
float: left;
color: #fff;
font-size: 13px;
text-decoration: none;
line-height: 30px;
padding: 0 20px;
height: 43px;
text-transform: uppercase;
}
.nav > li:hover > a {
background: #FFF;
color: #1b2c69;
}
HTML:
<ul class="nav">
<li>Home
</li>
<li>Our Company
<div class="tab1">
<div class="container-1">
<div class="col1"> Business Reports
<br> Core Values
<br> Corp Priority Updates
<br> Critical Success Factors
<br> Daily Reports
<br> EBIT Chart
<br> HyVisability Scorecard
<br> Mission Statement
<br> Quality Vision
<br> Strategic Vision
<br>
</div>
</div>
</div>
</li>

Answer 1

See this link
I have added bgcolor to background to see the white space.
The fix is:
.nav > li > a {
font-family: "Frutiger LT Std 45 Light", sans-serif;
float: left;
color: #fff;
font-size: 13px;
text-decoration: none;
line-height: 30px;
padding: 0 20px;
height: 30px;
text-transform: uppercase;
}
In the above css I changed height: 43px; to height: 30px;
Because the height for all li tags should be same in tour case to achieve what you want. Hope you understand.