website: Fix hero element centering

website/source/index.html.erb

 <div class="home">
 
-	<header class="hero dark-background text-left">
-	<div class="container">
+	<header class="dark-background">
+	<div class="container hero">
 		<div class="row">
 			<div class="span6 offset1">
 				<h2>
-					<span class="text-green">Packer</span> is a tool for creating identical machine images for multiple platforms from a single source configuration
+					<span class="text-green">Packer</span> is a tool for creating identical machine images for multiple platforms from a single source configuration.
 				</h2>
 			</div>
 		</div>

website/source/stylesheets/_components.scss

 .hero {
     height: $hero-height;
-    background: #000000 url(/images/hero_image.jpg) no-repeat 75% -25px;
-    background-size: 1008px 490px;
+    background: #000000 url(/images/hero_image.jpg) no-repeat 30px -5px;
+    background-size: 960px 467px;
     @include respond-to(mobile) {
         margin-right: -20px;
         margin-left: -20px;
@@ -15,7 +15,7 @@
             margin-top: $baseline * 4;
             margin-left: 20px;
             width: 80%;
-            font-size: 30px;
+            font-size: 28px;
             line-height: (35/30);
         }
     }

website/source/stylesheets/_helpers.scss

@@ -68,8 +68,8 @@ $mono: 'Inconsolata', 'courier new', courier, mono-space;
 
 //color
 .dark-background {
-background-color: inherit;
-color: $white;
+    background-color: #000;
+    color: $white;
 
 	a {
 	color: inherit;

website/source/stylesheets/_nav.scss

 nav {
-height: $nav-height;
-padding: $baseline 0;
-background-color: $black !important;
-padding: 0;
-margin: 0;
-text-transform: uppercase;
-color: $white;
-font-family: $sans;
-font-size: 16px;
-border-bottom: 1px solid $border-dark;
-@include respond-to(mobile) {
-margin-right: -20px;
-margin-left: -20px;
-}
+    height: $nav-height;
+    padding: $baseline 0;
+    padding: 0;
+    margin: 0;
+    text-transform: uppercase;
+    color: $white;
+    font-family: $sans;
+    font-size: 16px;
+    border-bottom: 1px solid $border-dark;
+    @include respond-to(mobile) {
+        margin-right: -20px;
+        margin-left: -20px;
+    }
 
     ul {
         margin-top: ($baseline * 2);