Docs: fixed newsletter button

Author: redox

doc/_includes/newsletter-mc.html

@@ -5,10 +5,10 @@
     <h3>Signup for our newsletter</h3>
     <div class="spacer20"></div>
     <div class="input-group">
-      <span class="input-group-addon" id="sizing-addon1"><i class="fa fa-envelope-o"></i></span>
+      <span class="input-group-addon" id="sizing-addon1"><i class="fa fa-envelope text-info"></i></span>
       <input type="email" value="" name="EMAIL" class="form-control" id="mce-EMAIL" placeholder="Email Address">
       <span class="input-group-btn">
-        <input type="submit" value="Subscribe" name="subscribe" id="mc-embedded-subscribe" class="btn btn-primary">
+        <input type="submit" value="Subscribe" name="subscribe" id="mc-embedded-subscribe" class="btn btn-info">
       </span>
     </div>
     <div id="mce-responses" class="clear">

doc/css/_base.scss

@@ -11,6 +11,12 @@ $headings-font-weight: 300;
 $brand-primary: transparent;
 $btn-primary-border: $magento-orange;
 
+$brand-info: #7183a7;
+
+$btn-info-border: #becce0;
+$btn-info-bg: #eceff3;
+$btn-info-color: #7183a7;
+
 $text-color: rgba(black, 0.75);
 
 $anchor-offset: 100px;