CSS Drop Down Menu Disappears - html

Question

So I have a drop down menu which works just fine as is, however when I attempt to change the font size found under:
#mbtnav li li a, #mbtnav li li a:link, #mbtnav li li a:visited {
background: #897768;
/* width: 140px; */
color: #FFF;
display: block;
font:bold 13px Futura, Impact, Helvetica, Arial, sans-serif;
margin: 0;
padding: 9px 12px 10px 12px;
text-decoration: none;
z-index:9999;
border-bottom:0px;
}
from 15px to anything larger, it causes the drop-down menu to disappear - whenever you move the mouse down from the static object to select one of the options.
I'm not sure what I need to alter in order to make the menu work with larger text.
Below is the full CSS code and an example of the HTML:
.Header h1 {text-shadow: 2px 2px #FFFFFF; }
/*----- MBT Drop Down Menu ----*/
#mbtnavbar {
/* background: #897768; */
width: 100%;
color: #897768;
margin: 0px;
padding: 0;
position: relative;
border-top:0px solid #FFF;
height: auto;
}
#mbtnav {
background: #FFF;
margin: 0;
padding: 0;
}
#mbtnav ul {
float: left;
list-style: none;
margin: 0;
padding: 0;
}
#mbtnav li {
list-style: none;
margin: 0;
padding: 0;
/* border-left:1px solid #333;
border-right:1px solid #333; */
height:41px;
}
#mbtnav li a, #mbtnav li a:link, #mbtnav li a:visited {
color: #4F4F4F;
display: block;
font:bold 15px Crushed, sans-serif;
margin: 0;
padding:9px 12px 10px 12px;
text-decoration: none;
}
#mbtnav li a:hover, #mbtnav li a:active {
background: #FFFFFF;
color: #65a5b2;
display: block;
text-decoration: none;
margin: 0;
padding: 9px 12px 10px 12px;
}
#mbtnav li {
float: left;
padding: 0;
}
#mbtnav li ul {
z-index: 9999;
position: absolute;
left: -999em;
height: 200px;
width: 200px;
margin: 0;
padding: 0;
}
#mbtnav li ul a {
width: 180px;
}
#mbtnav li ul ul {
margin: -35px 0 0 161px;
}
#mbtnav li:hover ul ul, #mbtnav li:hover ul ul ul, #mbtnav li.sfhover ul ul, #mbtnav li.sfhover ul ul ul {
left: -999em;
}
#mbtnav li:hover ul, #mbtnav li li:hover ul, #mbtnav li li li:hover ul, #mbtnav li.sfhover ul, #mbtnav li li.sfhover ul, #mbtnav li li li.sfhover ul {
left: auto;
}
#mbtnav li:hover, #mbtnav li.sfhover {
position: static;
}
#mbtnav li li a, #mbtnav li li a:link, #mbtnav li li a:visited {
background: #897768;
/* width: 140px; */
color: #FFF;
display: block;
font:bold 13px Futura, Impact, Helvetica, Arial, sans-serif;
margin: 0;
padding: 9px 12px 10px 12px;
text-decoration: none;
z-index:9999;
border-bottom:0px;
}
#mbtnav li li a:hover, #mbtnavli li a:active {
background: #897768;
color: #000000;
display: block;
margin: 0;
padding: 9px 12px 10px 12px;
text-decoration: none;
}
.tabs-inner .widget #mbtnavbar li a {
border-left:none;
}
.tabs-outer .widget, .section {
margin:0;
}
.tabs-inner {
padding: 0px;
}
HTML:
<div id="mbtnavbar">
<ul id="mbtnav">
<li>
Home
</li>
<li>
About
<ul>
<li>#1</li>
<li>#2</li>
<li>#3</li>
</ul>
</li>
</ul>
</div>

Answer 1

I gave this,and its working..Do you want something like this?
#mbtnav li li a, #mbtnav li li a:link, #mbtnav li li a:visited {
background: #897768;
/* width: 140px; */
color: #FFF;
display: block;
font:bold 13px Futura, Impact, Helvetica, Arial, sans-serif;
margin: 0;
padding: 9px 12px 10px 12px;
text-decoration: none;
z-index:9999;
border-bottom:0px;
font-size:20px;
}