update design of wiki git access page

app/assets/stylesheets/pages/wiki.scss

@@ -8,10 +8,6 @@
 .top-area {
   position: relative;
 
-  &.sub-header-block {
-    padding-right: 40px;
-  }
-
   button.sidebar-toggle {
     position: absolute;
     right: 0;
@@ -24,10 +20,7 @@
   }
 
   @media (min-width: $screen-md-min) {
-    &,
-    &.sub-header-block {
     padding-right: 0;
-    }
 
     button.sidebar-toggle {
       display: none;
@@ -35,6 +28,37 @@
   }
 }
 
+.wiki-page-header {
+  @extend .top-area;
+
+  .git-access-header {
+    padding: 16px 0 11px;
+    line-height: 28px;
+    font-size: 18px;
+  }
+
+  .git-clone-holder {
+    width: 480px;
+    padding-bottom: 40px;
+  }
+
+  @media (max-width: $screen-xs-max) {
+    .git-clone-holder {
+      width: 100%;
+    }
+  }
+}
+
+.wiki-git-access {
+  margin: $gl-padding 0;
+
+  h3 {
+    font-size: 22px;
+    font-weight: normal;
+    margin-top: 1.4em;
+  }
+}
+
 .right-sidebar.wiki-sidebar {
   padding: $gl-padding 0;
 

app/views/projects/wikis/git_access.html.haml

@@ -2,31 +2,29 @@
 - page_title "Git Access", "Wiki"
 
 %div{ class: container_class }
-  .top-area.sub-header-block
+  .wiki-page-header
     %button.btn.btn-default.visible-xs.visible-sm.pull-right.sidebar-toggle.js-sidebar-wiki-toggle{ role: "button", type: "button" }
       = icon('angle-double-left')
 
-    %span.oneline
-      Git access for
+    .git-access-header
+      Clone repository
       %strong= @project_wiki.path_with_namespace
 
-    .pull-right
     = render "shared/clone_panel", project: @project_wiki
 
-  .prepend-top-default
-    %fieldset
-      %legend Install Gollum:
+  .wiki-git-access
+    %h3 Install Gollum
     %pre.dark
       :preserve
         gem install gollum
 
-      %legend Clone Your Wiki:
+    %h3 Clone your wiki
     %pre.dark
       :preserve
         git clone #{ content_tag(:span, default_url_to_repo(@project_wiki), class: 'clone')}
         cd #{h @project_wiki.path}
 
-      %legend Start Gollum And Edit Locally:
+    %h3 Start Gollum and edit locally
     %pre.dark
       :preserve
         gollum