Add styles & images for Exp. Level step

- Add images
- Apply existing layout & spacing utility classes
- Create temporary classes in utilities.scss
- Add some custom, one-off styles for the page

app/assets/images/experienced.svg

+<svg height="82" viewBox="0 0 78 82" width="78" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill-rule="nonzero"><path d="m2.12 42c-.08 1-.12 2-.12 3 0 20.43 16.57 37 37 37s37-16.57 37-37c0-1-.04-2-.12-3-1.53 19.03-17.46 34-36.88 34s-35.35-14.97-36.88-34z" fill="#000" fill-opacity=".03"/><path d="m39 78c-21.54 0-39-17.46-39-39s17.46-39 39-39 39 17.46 39 39-17.46 39-39 39zm0-4c19.33 0 35-15.67 35-35s-15.67-35-35-35-35 15.67-35 35 15.67 35 35 35z" fill="#eee"/><path d="m44 31-2.5-3-2.5 3-2.5-3-2.5 3-2.5-3-2.5 3h-2.72c2.65-4.2 7.36-7 12.72-7s10.07 2.8 12.72 7h-2.72l-2.5-3z" fill="#e1dbf2"/><path d="m39 57c-9.4 0-17-7.6-17-17s7.6-17 17-17 17 7.6 17 17-7.6 17-17 17zm0-4c7.18 0 13-5.82 13-13s-5.82-13-13-13-13 5.82-13 13 5.82 13 13 13z" fill="#e1dbf2"/></g><g fill="#e2ba3e" stroke="#fff" transform="translate(14 18)"><path d="m8.5 12.75-4.99617464 2.6266445.95418445-5.56332227-4.0419902-3.93996668 5.58589307-.81167778 2.49808732-5.06167777 2.4980873 5.06167777 5.5858931.81167778-4.0419902 3.93996668.9541844 5.56332227z"/><path d="m24.5 12.75-4.9961746 2.6266445.9541844-5.56332227-4.0419902-3.93996668 5.5858931-.81167778 2.4980873-5.06167777 2.4980873 5.06167777 5.5858931.81167778-4.0419902 3.93996668.9541844 5.56332227z"/><path d="m40.5 12.75-4.9961746 2.6266445.9541844-5.56332227-4.0419902-3.93996668 5.5858931-.81167778 2.4980873-5.06167777 2.4980873 5.06167777 5.5858931.81167778-4.0419902 3.93996668.9541844 5.56332227z"/></g><path d="m35 45h8c0 2.2-1.8 4-4 4s-4-1.8-4-4zm-1.5-2c-.83 0-1.5-.67-1.5-1.5s.67-1.5 1.5-1.5 1.5.67 1.5 1.5-.67 1.5-1.5 1.5zm11 0c-.83 0-1.5-.67-1.5-1.5s.67-1.5 1.5-1.5 1.5.67 1.5 1.5-.67 1.5-1.5 1.5z" fill="#6b4fbb" fill-rule="nonzero"/></g></svg>
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app/assets/images/novice.svg

+<svg width="78" height="82" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><path d="M2.12 42C2.04 43 2 44 2 45c0 20.43 16.57 37 37 37s37-16.57 37-37c0-1-.04-2-.12-3C74.35 61.03 58.42 76 39 76S3.65 61.03 2.12 42z" fill-opacity=".03" fill="#000" fill-rule="nonzero"/><path d="M39 78C17.46 78 0 60.54 0 39S17.46 0 39 0s39 17.46 39 39-17.46 39-39 39zm0-4c19.33 0 35-15.67 35-35S58.33 4 39 4 4 19.67 4 39s15.67 35 35 35z" fill="#EEE" fill-rule="nonzero"/><path d="M44 31l-2.5-3-2.5 3-2.5-3-2.5 3-2.5-3-2.5 3h-2.72c2.65-4.2 7.36-7 12.72-7s10.07 2.8 12.72 7H49l-2.5-3-2.5 3z" fill="#E1DBF2" fill-rule="nonzero"/><path d="M39 57c-9.4 0-17-7.6-17-17s7.6-17 17-17 17 7.6 17 17-7.6 17-17 17zm0-4c7.18 0 13-5.82 13-13s-5.82-13-13-13-13 5.82-13 13 5.82 13 13 13z" fill="#E1DBF2" fill-rule="nonzero"/><g transform="translate(20 13)"><path d="M5.731 15.24V8.736H33.75v6.504c0 4.851-6.272 8.784-14.01 8.784-7.737 0-14.009-3.933-14.009-8.784z" fill="#0B2630"/><path d="M.75 7.662L18.824.182a2.4 2.4 0 0 1 1.835 0l18.072 7.48a1.2 1.2 0 0 1 0 2.218l-18.072 7.48a2.4 2.4 0 0 1-1.835 0L.75 9.88a1.2 1.2 0 0 1 0-2.218z" fill="#29424E"/><path d="M19.295 9.771a1.194 1.194 0 0 1-.66-1.557c.248-.612.948-.907 1.562-.659l11.516 4.657v11.766c0 .66-.538 1.195-1.2 1.195-.663 0-1.2-.535-1.2-1.195V13.822l-10.018-4.05z" fill="#FFCF00" fill-rule="nonzero"/><path d="M32.613 23.373v3.807h-4.2v-3.807c0-.711.353-1.34.894-1.72h2.411c.541.38.895 1.009.895 1.72z" fill="#FCA326"/><path fill="#FFCF00" d="M28.413 23.592H32.613V27.18H28.413z"/></g><path d="M35 45h8c0 2.2-1.8 4-4 4s-4-1.8-4-4zm-1.5-2c-.83 0-1.5-.67-1.5-1.5s.67-1.5 1.5-1.5 1.5.67 1.5 1.5-.67 1.5-1.5 1.5zm11 0c-.83 0-1.5-.67-1.5-1.5s.67-1.5 1.5-1.5 1.5.67 1.5 1.5-.67 1.5-1.5 1.5z" fill="#6B4FBB" fill-rule="nonzero"/></g></svg>
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app/assets/stylesheets/pages/experience_level.scss

+.signup-page[data-page^='registrations:experience_levels'] {
+  $card-shadow-color: rgba($black, 0.2);
+
+  .page-wrap {
+    background-color: $white;
+  }
+
+  .card-deck {
+    max-width: 828px;
+  }
+
+  .card {
+    transition: box-shadow 0.3s ease-in-out;
+  }
+
+  .card:hover {
+    box-shadow: 0 $gl-spacing-scale-3 $gl-spacing-scale-5 $card-shadow-color;
+  }
+
+  @media (min-width: $breakpoint-sm) {
+    .card-deck .card {
+      margin: 0 $gl-spacing-scale-3;
+    }
+  }
+
+  .stretched-link:hover {
+    text-decoration: none;
+  }
+}

app/assets/stylesheets/utilities.scss

@@ -89,3 +89,14 @@
 
 .gl-text-purple { color: $purple; }
 .gl-bg-purple-light { background-color: $purple-light; }
+
+// move this to GitLab UI once onboarding experiment is considered a success
+.gl-py-8 {
+  padding-top: $gl-spacing-scale-8;
+  padding-bottom: $gl-spacing-scale-8;
+}
+
+// move this to GitLab UI once onboarding experiment is considered a success
+.gl-pl-7 {
+  padding-left: $gl-spacing-scale-7;
+}

app/views/registrations/experience_levels/show.html.haml

 - page_title _('What’s your experience level?')
 
-%h3= _('Hello there')
-%p= _('Welcome to the guided GitLab tour')
+.gl-display-flex.gl-flex-direction-column.gl-align-items-center
+  = image_tag 'learn-gitlab-avatar.jpg', width: '90'
 
-%br
+  %h2.gl-text-center.gl-mt-3.gl-mb-3= _('Hello there')
+  %p.gl-text-center.gl-font-lg.gl-mb-6= _('Welcome to the guided GitLab tour')
 
-%h5= _('What describes you best?')
+  %h3.gl-text-center.gl-font-lg.gl-mt-6.gl-mb-0= _('What describes you best?')
 
-%hr
+  .card-deck.gl-mt-6
+    .card
+      .card-body.gl-display-flex.gl-py-8.gl-pr-5.gl-pl-7
+        .gl-align-self-center.gl-pr-6
+          = image_tag 'novice.svg', width: '78', height: '78', alt: ''
+        %div
+          %p.gl-font-lg.gl-font-weight-bold.gl-mb-2= _('Novice')
+          %p= _('I’m not very familiar with the basics of project management and DevOps.')
+          = link_to _('Show me everything'), users_sign_up_experience_level_path(experience_level: :novice, namespace_path: params[:namespace_path]), method: :patch, class: 'stretched-link'
 
-%div
-  %p
-    %b= _('Novice')
-  %p= _('I’m not very familiar with the basics of project management and DevOps.')
-  %p
-    = link_to _('Show me everything'), users_sign_up_experience_level_path(experience_level: :novice, namespace_path: params[:namespace_path]), method: :patch
-
-%hr
-
-%div
-  %p
-    %b= _('Experienced')
-  %p= _('I’m familiar with the basics of project management and DevOps.')
-  %p
-    = link_to _('Show me more advanced stuff'), users_sign_up_experience_level_path(experience_level: :experienced, namespace_path: params[:namespace_path]), method: :patch
+    .card
+      .card-body.gl-display-flex.gl-py-8.gl-pr-5.gl-pl-7
+        .gl-align-self-center.gl-pr-6
+          = image_tag 'experienced.svg', width: '78', height: '78', alt: ''
+        %div
+          %p.gl-font-lg.gl-font-weight-bold.gl-mb-2= _('Experienced')
+          %p= _('I’m familiar with the basics of project management and DevOps.')
+          = link_to _('Show me more advanced stuff'), users_sign_up_experience_level_path(experience_level: :experienced, namespace_path: params[:namespace_path]), method: :patch, class: 'stretched-link'