Add styling for definition lists

source/stylesheets/screen.css.scss

@@ -214,7 +214,7 @@ html, body {
   z-index: 30;
 
 
-  &>h1, &>h2, &>h3, &>p, &>table, &>ul, &>ol, &>aside {
+  &>h1, &>h2, &>h3, &>p, &>table, &>ul, &>ol, &>aside, &>dl {
     margin-right: $examples-width;
     padding: 0 $main-padding;
     @include box-sizing(border-box);
@@ -313,8 +313,15 @@ html, body {
     }
   }
 
+  dt {
+    font-weight: bold;
+  }
+
+  dd {
+    margin-left: 15px;
+  }
 
-  p, li {
+  p, li, dt, dd {
     line-height: 1.6;
     margin-top: 0;
   }