JSFiddle - React, Tailwind, and code Playground

HTML

<nav>
    This is the top bar/nav
</nav>

<div id='iframe'><iframe src='http://wordpress.org' /></div>

CSS

nav {
  position: fixed;
  background: red;
  top: 0;
  width: 100%;    
}

body{
  margin: 0px;
  padding: 0px;
}

html {
    height: 100%;
    overflow: hidden;
}
body {
    font-family: arial,sans-serif;
    font-size: 16px;
    height: 100%;
    margin: 0;
    padding: 0;
}
a {
    color: #000000;
    text-decoration: none;
}
a:hover {
    color: #840000;
    text-decoration: none;
}
img {
    border: 0 none;
}
#toolbar {
    background: url("images/wrapper-frame1.png") repeat-x scroll 0 0 transparent;
    height: 33px;
    overflow: hidden;
}
#logo {
    float: left;
    height: 33px;
    margin: 0 0 0 10px;
    width: 300px;
}
#main {
    margin-left: 15px;
}
#links {
    height: 25px;
}
#close {
    background: url("images/close.png") no-repeat scroll 0 0 transparent;
display: none;
    height: 21px;
    margin: -29px 0 0;
    position: absolute;
    right: 25px;
    width: 16px;
}
.twitter {
    background: url("http://3.bp.blogspot.com/_0s-GnnHKfng/TGAXSCqMCSI/AAAAAAAAAZk/aSLIKHABZrY/s1600/icon_twitter.png") no-repeat scroll 0 0 transparent;
    display: block;
    height: 40px;
    margin: 15px 0 0;
    overflow: hidden;
    position: absolute;
    right: 70px;
    width: 50px;
}
.twitter:hover {
    background: url("http://3.bp.blogspot.com/_0s-GnnHKfng/TGAXSCqMCSI/AAAAAAAAAZk/aSLIKHABZrY/s1600/icon_twitter.png") no-repeat scroll 0 -40px transparent;
}
.rss {
    background: url("http://1.bp.blogspot.com/_0s-GnnHKfng/TGAXRs9MxfI/AAAAAAAAAZU/btnYzOUdGCA/s1600/icon_rss.png") no-repeat scroll 0 0 transparent;
    display: block;
    height: 40px;
    margin: 12px 0 0;
    overflow: hidden;
    position: absolute;
    right: 120px;
    width: 50px;
}
.rss:hover {
    background: url("http://1.bp.blogspot.com/_0s-GnnHKfng/TGAXRs9MxfI/AAAAAAAAAZU/btnYzOUdGCA/s1600/icon_rss.png") no-repeat scroll 0 -40px transparent;
}
#extra {
    height: 100px;
    margin: 35px 0 0;
}
#iframe {
    overflow: hidden;
}
#iframe, iframe {
    border: medium none;
    height:...