style.css

body {
  background-color: #EBE8E4;
  color: #222;
  font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
  font-weight: 300;
  font-size: 15px;
}

/*iframe {
  width: 96%;
  height: 1000px;
  margin: 10px 0 0 22px;
}*/

#mainContentWrapper {
  width: 96%;
  margin-left: 2px;
}

nav {
background-color: #fff;
border: 1px solid #dedede;
border-radius: 4px;
box-shadow: 0 2px 2px -1px rgba(0, 0, 0, 0.055);
color: #888;
display: block;
overflow: hidden;
}

nav ul {
margin: 0;
padding: 0;
}

nav ul li {
display: inline-block;
list-style-type: none;

-webkit-transition: all 0.2s;
-moz-transition: all 0.2s;
-ms-transition: all 0.2s;
-o-transition: all 0.2s;
transition: all 0.2s;
}

nav > ul > li > a > .caret {
border-top: 4px solid #aaa;
border-right: 4px solid transparent;
border-left: 4px solid transparent;
content: "";
display: inline-block;
height: 0;
width: 0;
vertical-align: middle;

-webkit-transition: color 0.1s linear;
-moz-transition: color 0.1s linear;
-o-transition: color 0.1s linear;
transition: color 0.1s linear;
}

nav > ul > li > a {
color: #aaa;
display: block;
line-height: 56px;
padding: 0 24px;
text-decoration: none;
}

nav > ul > li:hover {
background-color: rgb( 40, 44, 47 );
}

nav > ul > li:hover > a {
color: rgb( 255, 255, 255 );
}

nav > ul > li:hover > a > .caret {
border-top-color: rgb( 255, 255, 255 );
}

nav > ul > li > ul {
background-color: rgb( 40, 44, 47 );
border-top: 0;
border-radius: 0 0 4px 4px;
box-shadow: 0 2px 2px -1px rgba(0, 0, 0, 0.055);
display: none;
margin: 0;
opacity: 0;
position: absolute;
width: 165px;
visibility: hidden;

-webkit-transiton: opacity 0.2s;
-moz-transition: opacity 0.2s;
-ms-transition: opacity 0.2s;
-o-transition: opacity 0.2s;
-transition: opacity 0.2s;
}

nav > ul > li:hover > ul {
display: block;
opacity: 1;
visibility: visible;
}

nav > ul > li > ul > li {
display: block;
}

nav > ul > li > ul > li > a {
color: #fff;
display: block;
padding: 12px 24px;
text-decoration: none;
}

nav > ul > li > ul > li:hover > a {
background-color: rgba( 255, 255, 255, 0.1);
}