Use mixin for calculating logo font-size.

Add search form. Needs styling

css/style.css

-@import url(http://fonts.googleapis.com/css?family=Ubuntu:300,400,500,700,400italic);.logo{position:absolute;top:0;left:0;z-index:10}body.toolbar .logo{top:30px}header.banner{margin-bottom:0}header.banner.inverse{background:#f7f7f7;margin-bottom:20px;margin-top:-3px}header.banner.inverse .nav-primary ul{border-color:#fff}header.banner.inverse .nav-primary ul li,header.banner.inverse .nav-primary ul li:last-child{border-color:#eaeaea}header.banner.inverse .nav-primary ul li a:link,header.banner.inverse .nav-primary ul li a:visited{border-color:#fff;color:#978e83}header.banner.inverse .nav-primary ul li a:hover{background:#eaeaea;color:#454545}header.banner.inverse .nav-primary a.active,header.banner.inverse .nav-primary a:active{border-color:#eaeaea;background:#eaeaea}header.banner .site-name{float:right}header.banner .site-name .logo-ubuntuit{font-size:36px;line-height:48px;margin-bottom:0;position:relative;text-transform:lowercase;margin:0;display:inline-block;margin-left:20px}
+@import url(http://fonts.googleapis.com/css?family=Ubuntu:300,400,500,700,400italic);::selection{background:#ed6637}a::selection,a *::selection{background:#77216f}.logo{position:absolute;top:0;left:0;z-index:10}body.toolbar .logo{top:30px}header.banner{margin-bottom:0}header.banner.inverted{background:#f7f7f7;margin-bottom:20px;margin-top:-3px}header.banner.inverted .nav-primary ul{border-color:#fff}header.banner.inverted .nav-primary ul li,header.banner.inverted .nav-primary ul li:last-child{border-color:#eaeaea}header.banner.inverted .nav-primary ul li a:link,header.banner.inverted .nav-primary ul li a:visited{border-color:#fff;color:#978e83}header.banner.inverted .nav-primary ul li a:hover{background:#eaeaea;color:#454545}header.banner.inverted .nav-primary a.active,header.banner.inverted .nav-primary a:active{border-color:#eaeaea;background:#eaeaea}header.banner .site-name{float:right}header.banner .site-name .logo-ubuntuit{font-size:2.25em;margin-bottom:0.33333em;margin-bottom:0;position:relative;text-transform:lowercase;margin:0;display:inline-block;margin-left:20px}

sass/style.scss

 @import 'core/core-constants.scss';
+@import 'core/core-mixins.scss';
 @import url(http://fonts.googleapis.com/css?family=Ubuntu:300,400,500,700,400italic);
 
+// Override default text selection color
+::selection {
+	background:lighten($ubuntu_orange, 10%);
+}
+a {
+	&::selection,
+	& *::selection {
+		background:$light_aubergine;
+	}
+}
+
 .logo {
 	position:absolute;
 	top:0;
@@ -15,7 +27,7 @@
 header.banner {
 	margin-bottom:0;
 
-	&.inverse {
+	&.inverted {
 		background: $light_grey;
 		margin-bottom:20px;
 		margin-top:-3px; // Ugly fix for gap between navbar
@@ -54,8 +66,7 @@ header.banner {
 	.site-name {
 		float:right;
 		.logo-ubuntuit {
-			font-size:36px;
-			line-height:48px;
+			@include font_size(36);
 			margin-bottom:0;
 			position:relative;
 			text-transform:lowercase;

tpl/page.tpl.php

@@ -76,7 +76,7 @@
  */
 ?>
 
-<?php if ( !$logo ) : ?>
+<?php if ( $logo ) : ?>
 	<div class="logo">
 		<a class="logo-ubuntu" href="<?php print $front_page; ?>" title="<?php print t('Home'); ?>" rel="home" id="logo">
 			<img src="<?php print $logo; ?>" width="134" height="96" alt="<?php print t('Home'); ?>">
@@ -97,11 +97,17 @@
 		<?php endif; ?>
 		</nav>
 	</header>
-	<header class="banner global inverse" role="banner">
-		<nav class="nav-primary" role="navigation">
+	<header class="banner global inverted" role="banner">
+		<nav class="nav-primary nav-left" role="navigation">
 			<ul>
 				<li><a href="#">Somewhere</a></li>
 			</ul>
+			<form action="/search" id="google-appliance-search-form" class="header-search">
+				<input type="search" maxlength="255" name="s" id="edit-keys" class="form-text" placeholder="Search&hellip;" value="" />
+				<button type="submit">
+					<img src="http://assets.ubuntu.com/sites/ubuntu/1044/u/img/search-white.svg" alt="Search" height="28" />
+				</button>
+			</form>
 		</nav>
 	</header>