I'm a noob.  I have added a WebDropDown to my page without applying any formatting.  The code is:

                <ig:WebDropDown ID="QuickLinks" runat="server" Width="200px" ToolTip="Jump quickly to a Manchester web page.">
                    <Items>
                        <ig:DropDownItem NavigateUrl="http://its.manchester.edu" Selected="False" Target="_blank" Text="ITS" Value="">
                        </ig:DropDownItem>
                        <ig:DropDownItem NavigateUrl="http://espn.go.com" Selected="False" Target="_blank" Text="ESPN" Value="">
                        </ig:DropDownItem>
                    </Items>
                </ig:WebDropDown>

This is what the drop down list looks like when run in any browser.

Here's the only applied CSS to the page.

/* RESET FIRST!  THANKS ERIC MEYER! */

/* http://meyerweb.com/eric/tools/css/reset/
   v2.0 | 20110126
   License: none (public domain)
*/

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
    display: block;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}

/* MAIN SECTION */

.bold {
    font-weight: bold;
}

.center {
    text-align: center;
}

.clear {
    clear: both;
}

.float-left {
    float: left;
}

.float-right {
    float: right;
}

footer {
    background-color: black;
    color: white;
    bottom: 0em;
    padding: 1em;
    position: absolute;
    width: 100%;
}

html {
    background: linear-gradient(to bottom right, #EEEEEE 0%, #CCCCCC 100%) top 144px left;
    color: #222;
    font-family: "ff-meta-web-pro", Georgia, Verdana, serif;
    min-height: 100%;
    min-width: 100%;
}

h1 {
    font-size: 2.0em;
}

h2 {
    font-size: 1.4em;
}

header {
    background-color: white;
    overflow: hidden;
    padding: 31px;
    padding-bottom: 22px;
    padding-left: 6%;
}

#main {
    background-color: white;
    border: 1px solid #222;
    border-radius: 10px;
    margin: 0 auto;
    padding: 2em;
    width: 90%;
}

nav {
     background-color: #EEB111;
     border-bottom: 1px solid #222;
     border-top: 1px solid #222;
     margin-bottom: 1em;
     padding: 1em;
     padding-left: 6%;
     padding-right: 6%;
}

    nav ul {
        background-color: inherit;
        font-size: 1.1em;
        text-align: right;
    }

p {
    font-size: .9em;
    padding: .25em;
}

.underline {
    text-decoration: underline;
}

This is for .NET 4.5 and with 2013.1.

How do I get rid of the spacing at the bottom?  Is there good documentation on the CSS behind Infragistics controls?

Thanks,
Michael