Restructure elements and components

sass/base/base.sass

@@ -1,6 +1,5 @@
 @charset "utf-8"
 
 @import "generic"
-@import "content"
-@import "highlight"
 @import "helpers"
+@import "highlight"

sass/base/content.sass

@@ -1,67 +0,0 @@
-.content
-  @extend .block
-  // Inline
-  li + li
-    margin-top: 0.25em
-  // Block
-  blockquote,
-  p,
-  ol,
-  ul
-    &:not(:last-child)
-      margin-bottom: 1em
-  h1,
-  h2,
-  h3,
-  h4,
-  h5,
-  h6
-    color: $text-strong
-    font-weight: 300
-    line-height: 1.125
-    margin-bottom: 20px
-  h1,
-  h2,
-  h3
-    &:not(:first-child)
-      margin-top: 40px
-  blockquote
-    background: $background
-    border-left: 5px solid $border
-    padding: 1.5em
-  h1
-    font-size: 2em
-  h2
-    font-size: 1.75em
-  h3
-    font-size: 1.5em
-  h4
-    font-size: 1.25em
-  h5
-    font-size: 1.125em
-  h6
-    font-size: 1em
-  ol
-    list-style: decimal outside
-    margin-left: 2em
-    margin-right: 2em
-    margin-top: 1em
-  ul
-    list-style: disc outside
-    margin-left: 2em
-    margin-right: 2em
-    margin-top: 1em
-    ul
-      list-style-type: circle
-      margin-top: 0.5em
-      ul
-        list-style-type: square
-  // Sizes
-  &.is-medium
-    font-size: $size-5
-    code
-      font-size: $size-6
-  &.is-large
-    font-size: $size-4
-    code
-      font-size: $size-5