diff --git a/fork-versions/default/_normalize.scss b/fork-versions/default/_normalize.scss
index c2dd31688..3e98e9e8b 100644
--- a/fork-versions/default/_normalize.scss
+++ b/fork-versions/default/_normalize.scss
@@ -44,7 +44,7 @@ html {
   -webkit-text-size-adjust: 100%; /* 3 */
 }
 
-/* HTML5 display definitions
+/* Sections
    ========================================================================== */
 
 /**
@@ -56,62 +56,63 @@ body {
 }
 
 /**
- * Add the correct display in IE <10.
- * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
- * Add the correct display in IE for `main`.
+ * Add the correct display in IE 9-.
  */
 
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block;
 }
 
 /**
- * Add the correct display in IE <10.
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
  */
 
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
-}
-
-/**
- * Add the correct display and remove excess height in iOS 4-7.
- */
+h1 {
+  @include normalize-font-size($h1-font-size);
+  @if $normalize-vertical-rhythm {
+    @include normalize-line-height($h1-font-size);
+  }
 
-audio:not([controls]) {
-  display: none;
-  height: 0;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  @include normalize-margin(1 0, $h1-font-size);
 }
 
-/**
- * Add the correct vertical alignment in Chrome, Firefox, and Opera.
- */
+@if $normalize-vertical-rhythm {
+  h2 {
+    @include normalize-font-size($h2-font-size);
+    @include normalize-line-height($h2-font-size);
+    @include normalize-margin(1 0, $h2-font-size);
+  }
 
-progress {
-  vertical-align: baseline;
-}
+  h3 {
+    @include normalize-font-size($h3-font-size);
+    @include normalize-line-height($h3-font-size);
+    @include normalize-margin(1 0, $h3-font-size);
+  }
 
-/**
- * Add the correct display in IE <11, Safari <8, and Firefox <22.
- * 1. Add the correct display in IE.
- */
+  h4 {
+    @include normalize-font-size($h4-font-size);
+    @include normalize-line-height($h4-font-size);
+    @include normalize-margin(1 0, $h4-font-size);
+  }
 
-template, /* 1 */
-[hidden] {
-  display: none;
+  h5 {
+    @include normalize-font-size($h5-font-size);
+    @include normalize-line-height($h5-font-size);
+    @include normalize-margin(1 0, $h5-font-size);
+  }
+
+  h6 {
+    @include normalize-font-size($h6-font-size);
+    @include normalize-line-height($h6-font-size);
+    @include normalize-margin(1 0, $h6-font-size);
+  }
 }
 
 /* Links
@@ -190,53 +191,6 @@ dfn {
   font-style: italic;
 }
 
-/**
- * Correct the font size and margin on `h1` elements within `section` and
- * `article` contexts in Chrome, Firefox, and Safari.
- */
-
-h1 {
-  @include normalize-font-size($h1-font-size);
-  @if $normalize-vertical-rhythm {
-    @include normalize-line-height($h1-font-size);
-  }
-
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  @include normalize-margin(1 0, $h1-font-size);
-}
-
-@if $normalize-vertical-rhythm {
-  h2 {
-    @include normalize-font-size($h2-font-size);
-    @include normalize-line-height($h2-font-size);
-    @include normalize-margin(1 0, $h2-font-size);
-  }
-
-  h3 {
-    @include normalize-font-size($h3-font-size);
-    @include normalize-line-height($h3-font-size);
-    @include normalize-margin(1 0, $h3-font-size);
-  }
-
-  h4 {
-    @include normalize-font-size($h4-font-size);
-    @include normalize-line-height($h4-font-size);
-    @include normalize-margin(1 0, $h4-font-size);
-  }
-
-  h5 {
-    @include normalize-font-size($h5-font-size);
-    @include normalize-line-height($h5-font-size);
-    @include normalize-margin(1 0, $h5-font-size);
-  }
-
-  h6 {
-    @include normalize-font-size($h6-font-size);
-    @include normalize-line-height($h6-font-size);
-    @include normalize-margin(1 0, $h6-font-size);
-  }
-}
-
 /**
  * Add the correct background and color in IE <10.
  */
@@ -278,6 +232,24 @@ sup {
 /* Embedded content
    ========================================================================== */
 
+/**
+ * Add the correct display in IE 9-.
+ */
+
+audio,
+video {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
 /**
  * Remove the border on images inside links in IE <11.
  */
@@ -336,6 +308,15 @@ svg:not(:root) {
   }
 }
 
+/**
+ * Add the correct display in IE 9-.
+ */
+
+figcaption,
+figure {
+  display: block;
+}
+
 /**
  * Add the correct margin in IE 8.
  */
@@ -355,6 +336,14 @@ hr {
   overflow: visible; /* 2 */
 }
 
+/**
+ * Add the correct display in IE.
+ */
+
+main {
+  display: block;
+}
+
 @if $normalize-vertical-rhythm {
   /**
    * Set 1 unit of vertical rhythm on the top and bottom margin.
@@ -561,6 +550,16 @@ optgroup {
   font-weight: bold;
 }
 
+/**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+
+progress {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
 /**
  * Remove the default vertical scrollbar in IE.
  */
@@ -568,3 +567,54 @@ optgroup {
 textarea {
   overflow: auto;
 }
+
+/* Interactive
+   ========================================================================== */
+
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+
+details, /* 1 */
+menu {
+  display: block;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Scripting
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+canvas {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+template {
+  display: none;
+}
+
+/* Hidden
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 10-.
+ */
+
+[hidden] {
+  display: none;
+}
diff --git a/fork-versions/deprecated-compass/_normalize.scss b/fork-versions/deprecated-compass/_normalize.scss
index 3dbfe88b2..7f89ddaf5 100644
--- a/fork-versions/deprecated-compass/_normalize.scss
+++ b/fork-versions/deprecated-compass/_normalize.scss
@@ -47,7 +47,7 @@ html {
   -webkit-text-size-adjust: 100%; /* 2 */
 }
 
-/* HTML5 display definitions
+/* Sections
    ========================================================================== */
 
 /**
@@ -59,62 +59,67 @@ body {
 }
 
 /**
- * Add the correct display in IE <10.
- * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
- * Add the correct display in IE for `main`.
+ * Add the correct display in IE 9-.
  */
 
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block;
 }
 
 /**
- * Add the correct display in IE <10.
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
  */
 
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
-}
-
-/**
- * Add the correct display and remove excess height in iOS 4-7.
- */
+h1 {
+  /* Set the font-size and line-height while keeping a proper vertical rhythm. */
+  @if $normalize-vertical-rhythm {
+    @include adjust-font-size-to( $h1-font-size );
+  }
+  @else {
+    font-size: if($rhythm-unit == "px", $h1-font-size, unquote("#{$h1-font-size / $base-font-size}#{$rhythm-unit}"));
+  }
 
-audio:not([controls]) {
-  display: none;
-  height: 0;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  @include leader(1, $h1-font-size);
+  @include trailer(1, $h1-font-size);
 }
 
-/**
- * Add the correct vertical alignment in Chrome, Firefox, and Opera.
- */
+@if $normalize-vertical-rhythm {
+  h2 {
+    @include adjust-font-size-to( $h2-font-size );
+    @include leader(1, $h2-font-size);
+    @include trailer(1, $h2-font-size);
+  }
 
-progress {
-  vertical-align: baseline;
-}
+  h3 {
+    @include adjust-font-size-to( $h3-font-size );
+    @include leader(1, $h3-font-size);
+    @include trailer(1, $h3-font-size);
+  }
 
-/**
- * Add the correct display in IE <11, Safari <8, and Firefox <22.
- * 1. Add the correct display in IE.
- */
+  h4 {
+    @include adjust-font-size-to( $h4-font-size );
+    @include leader(1, $h4-font-size);
+    @include trailer(1, $h4-font-size);
+  }
 
-template, /* 1 */
-[hidden] {
-  display: none;
+  h5 {
+    @include adjust-font-size-to( $h5-font-size );
+    @include leader(1, $h5-font-size);
+    @include trailer(1, $h5-font-size);
+  }
+
+  h6 {
+    @include adjust-font-size-to( $h6-font-size );
+    @include leader(1, $h6-font-size);
+    @include trailer(1, $h6-font-size);
+  }
 }
 
 /* Links
@@ -193,57 +198,6 @@ dfn {
   font-style: italic;
 }
 
-/**
- * Correct the font size and margin on `h1` elements within `section` and
- * `article` contexts in Chrome, Firefox, and Safari.
- */
-
-h1 {
-  /* Set the font-size and line-height while keeping a proper vertical rhythm. */
-  @if $normalize-vertical-rhythm {
-    @include adjust-font-size-to( $h1-font-size );
-  }
-  @else {
-    font-size: if($rhythm-unit == "px", $h1-font-size, unquote("#{$h1-font-size / $base-font-size}#{$rhythm-unit}"));
-  }
-
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  @include leader(1, $h1-font-size);
-  @include trailer(1, $h1-font-size);
-}
-
-@if $normalize-vertical-rhythm {
-  h2 {
-    @include adjust-font-size-to( $h2-font-size );
-    @include leader(1, $h2-font-size);
-    @include trailer(1, $h2-font-size);
-  }
-
-  h3 {
-    @include adjust-font-size-to( $h3-font-size );
-    @include leader(1, $h3-font-size);
-    @include trailer(1, $h3-font-size);
-  }
-
-  h4 {
-    @include adjust-font-size-to( $h4-font-size );
-    @include leader(1, $h4-font-size);
-    @include trailer(1, $h4-font-size);
-  }
-
-  h5 {
-    @include adjust-font-size-to( $h5-font-size );
-    @include leader(1, $h5-font-size);
-    @include trailer(1, $h5-font-size);
-  }
-
-  h6 {
-    @include adjust-font-size-to( $h6-font-size );
-    @include leader(1, $h6-font-size);
-    @include trailer(1, $h6-font-size);
-  }
-}
-
 /**
  * Add the correct background and color in IE <10.
  */
@@ -285,6 +239,24 @@ sup {
 /* Embedded content
    ========================================================================== */
 
+/**
+ * Add the correct display in IE 9-.
+ */
+
+audio,
+video {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
 /**
  * Remove the border on images inside links in IE <11.
  */
@@ -343,6 +315,15 @@ svg:not(:root) {
   }
 }
 
+/**
+ * Add the correct display in IE 9-.
+ */
+
+figcaption,
+figure {
+  display: block;
+}
+
 /**
  * Add the correct margin in IE 8.
  */
@@ -362,6 +343,14 @@ hr {
   overflow: visible; /* 2 */
 }
 
+/**
+ * Add the correct display in IE.
+ */
+
+main {
+  display: block;
+}
+
 @if $normalize-vertical-rhythm {
   /**
    * Set 1 unit of vertical rhythm on the top and bottom margin.
@@ -572,6 +561,16 @@ optgroup {
   font-weight: bold;
 }
 
+/**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+
+progress {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
 /**
  * Remove the default vertical scrollbar in IE.
  */
@@ -579,3 +578,54 @@ optgroup {
 textarea {
   overflow: auto;
 }
+
+/* Interactive
+   ========================================================================== */
+
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+
+details, /* 1 */
+menu {
+  display: block;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Scripting
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+canvas {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+template {
+  display: none;
+}
+
+/* Hidden
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 10-.
+ */
+
+[hidden] {
+  display: none;
+}
diff --git a/fork-versions/typey-chroma-kss/base/_html5.scss b/fork-versions/typey-chroma-kss/base/_html5.scss
deleted file mode 100644
index e4cecf91c..000000000
--- a/fork-versions/typey-chroma-kss/base/_html5.scss
+++ /dev/null
@@ -1,55 +0,0 @@
-// HTML5 display definitions
-// ==========================================================================
-
-
-body {
-  // Output a horizontal grid to help with debugging typography. The
-  // $typey-debug variable will toggle its output.
-  @include typey-debug-grid();
-  // Remove default margin and padding.
-  margin: 0;
-  padding: 0;
-}
-
-// Add the correct display in IE <10.
-// Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-// Add the correct display in IE for `main`.
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block;
-}
-
-// Add the correct display in IE <10.
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
-}
-
-// Add the correct display and remove excess height in iOS 4-7.
-audio:not([controls]) {
-  display: none;
-  height: 0;
-}
-
-// Add the correct vertical alignment in Chrome, Firefox, and Opera.
-progress {
-  vertical-align: baseline;
-}
-
-// Add the correct display in IE <11, Safari <8, and Firefox <22.
-template,
-[hidden] {
-  display: none;
-}
diff --git a/fork-versions/typey-chroma-kss/base/_normalize.scss b/fork-versions/typey-chroma-kss/base/_normalize.scss
index 1803466c0..1d4a83f6c 100644
--- a/fork-versions/typey-chroma-kss/base/_normalize.scss
+++ b/fork-versions/typey-chroma-kss/base/_normalize.scss
@@ -10,14 +10,16 @@
 
 // Normalize-scss is broken into modular pieces to make it easier to edit.
 @import 'document/document';
-@import 'html5';
+@import 'sections/sections';
 @import 'links/links';
-@import 'headings/headings';
 @import 'text/text';
 @import 'grouping/grouping';
 @import 'embedded/embedded';
 @import 'forms/forms';
 @import 'tables/tables';
+@import 'interactive/interactive';
+@import 'scripting/scripting';
+@import 'hidden/hidden';
 
 // Note: we allow the .button component (loaded by forms) to override :link, by
 // loading links first.
diff --git a/fork-versions/typey-chroma-kss/base/embedded/_embedded.scss b/fork-versions/typey-chroma-kss/base/embedded/_embedded.scss
index 23359d0c1..f98c3bf82 100644
--- a/fork-versions/typey-chroma-kss/base/embedded/_embedded.scss
+++ b/fork-versions/typey-chroma-kss/base/embedded/_embedded.scss
@@ -4,6 +4,21 @@
 //
 // Style guide: base.embedded
 
+// Audio
+//
+// Style guide: base.embedded.audio
+
+audio {
+  // Add the correct display in IE 9-.
+  display: inline-block;
+}
+
+// Add the correct display and remove excess height in iOS 4-7.
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
 // Image
 //
 // An `<img>` element represents an image.
@@ -39,3 +54,12 @@ svg:not(:root) {
   // Hide the overflow in IE.
   overflow: hidden;
 }
+
+// Video
+//
+// Style guide: base.embedded.video
+
+video {
+  // Add the correct display in IE 9-.
+  display: inline-block;
+}
diff --git a/fork-versions/typey-chroma-kss/base/forms/_forms.scss b/fork-versions/typey-chroma-kss/base/forms/_forms.scss
index c59c0ff7b..4d0285cb7 100644
--- a/fork-versions/typey-chroma-kss/base/forms/_forms.scss
+++ b/fork-versions/typey-chroma-kss/base/forms/_forms.scss
@@ -234,6 +234,19 @@ optgroup {
   font-weight: bold;
 }
 
+// Progress
+//
+// The `<progress>` HTML element.
+//
+// Style guide: forms.base.progress
+
+progress {
+  // Add the correct display in IE 9-.
+  display: inline-block;
+  // Add the correct vertical alignment in Chrome, Firefox, and Opera.
+  vertical-align: baseline;
+}
+
 // Text areas
 //
 // The `<textarea>` element represents a multi-line plain text form field.
diff --git a/fork-versions/typey-chroma-kss/base/hidden/_hidden.scss b/fork-versions/typey-chroma-kss/base/hidden/_hidden.scss
new file mode 100644
index 000000000..0b5bf13ff
--- /dev/null
+++ b/fork-versions/typey-chroma-kss/base/hidden/_hidden.scss
@@ -0,0 +1,10 @@
+// Hidden
+//
+// Some older browsers do not hide elements that have a `hidden` attribute.
+//
+// Style guide: base.hidden
+
+[hidden] {
+  // Add the correct display in IE 10-.
+  display: none;
+}
diff --git a/fork-versions/typey-chroma-kss/base/interactive/_interactive.scss b/fork-versions/typey-chroma-kss/base/interactive/_interactive.scss
new file mode 100644
index 000000000..8e0818d2b
--- /dev/null
+++ b/fork-versions/typey-chroma-kss/base/interactive/_interactive.scss
@@ -0,0 +1,26 @@
+// Interactive
+//
+// Style guide: base.interactive
+
+// Details
+//
+// Style guide: base.interactive.details
+
+details {
+  // Add the correct display in Edge, IE, and Firefox.
+  display: block;
+}
+
+summary {
+  // Add the correct display in all browsers.
+  display: list-item;
+}
+
+// Menu
+//
+// Style guide: base.interactive.menu
+
+menu {
+  // Add the correct display in IE 9-.
+  display: block;
+}
diff --git a/fork-versions/typey-chroma-kss/base/scripting/_scripting.scss b/fork-versions/typey-chroma-kss/base/scripting/_scripting.scss
new file mode 100644
index 000000000..05448d97a
--- /dev/null
+++ b/fork-versions/typey-chroma-kss/base/scripting/_scripting.scss
@@ -0,0 +1,24 @@
+// Scripting
+//
+// Style guide: base.scripting
+
+// Canvas
+//
+// Style guide: base.scripting.canvas
+
+canvas {
+  // Add the correct display in IE 9-.
+  display: inline-block;
+}
+
+// Template
+//
+// Some older browsers do not hide elements the web components' `template`
+// element.
+//
+// Style guide: base.scripting.template
+
+template {
+  // Add the correct display in IE.
+  display: none;
+}
diff --git a/fork-versions/typey-chroma-kss/base/headings/_headings.scss b/fork-versions/typey-chroma-kss/base/sections/_sections.scss
similarity index 65%
rename from fork-versions/typey-chroma-kss/base/headings/_headings.scss
rename to fork-versions/typey-chroma-kss/base/sections/_sections.scss
index 799321113..2dd36977f 100644
--- a/fork-versions/typey-chroma-kss/base/headings/_headings.scss
+++ b/fork-versions/typey-chroma-kss/base/sections/_sections.scss
@@ -1,3 +1,26 @@
+// Sections
+// ==========================================================================
+
+
+body {
+  // Output a horizontal grid to help with debugging typography. The
+  // $typey-debug variable will toggle its output.
+  @include typey-debug-grid();
+  // Remove the margin in all browsers (opinionated).
+  margin: 0;
+  padding: 0;
+}
+
+// Add the correct display in IE 9-.
+article,
+aside,
+footer,
+header,
+nav,
+section {
+  display: block;
+}
+
 // Headings
 //
 // All HTML headings, `<h1>` through `<h6>`, are available. `%h1` through `%h6`
@@ -8,8 +31,8 @@
 //
 // Style guide: base.headings
 
-// Address variable `h1` font-size and margin within `section` and `article`
-// contexts in Firefox 4+, Safari, and Chrome.
+// Correct the font size and margin on `h1` elements within `section` and
+// `article` contexts in Chrome, Firefox, and Safari.
 h1,
 %h1 {
   // Set the font-size and line-height while keeping a proper vertical rhythm.
diff --git a/fork-versions/typey-chroma-kss/base/headings/headings-h.twig b/fork-versions/typey-chroma-kss/base/sections/headings-h.twig
similarity index 100%
rename from fork-versions/typey-chroma-kss/base/headings/headings-h.twig
rename to fork-versions/typey-chroma-kss/base/sections/headings-h.twig
diff --git a/fork-versions/typey/_normalize.scss b/fork-versions/typey/_normalize.scss
index 600b8236d..b8bd8941f 100644
--- a/fork-versions/typey/_normalize.scss
+++ b/fork-versions/typey/_normalize.scss
@@ -23,7 +23,7 @@ html {
   -webkit-text-size-adjust: 100%; /* 3 */
 }
 
-/* HTML5 display definitions
+/* Sections
    ========================================================================== */
 
 /**
@@ -35,62 +35,53 @@ body {
 }
 
 /**
- * Add the correct display in IE <10.
- * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
- * Add the correct display in IE for `main`.
+ * Add the correct display in IE 9-.
  */
 
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block;
 }
 
 /**
- * Add the correct display in IE <10.
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
  */
 
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
-}
+h1 {
+  @include type-layout(xxl, 2);
 
-/**
- * Add the correct display and remove excess height in iOS 4-7.
- */
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  @include margin(1 0, xxl);
+}
 
-audio:not([controls]) {
-  display: none;
-  height: 0;
+h2 {
+  @include type-layout(xl, 1.5);
+  @include margin(1 0, xl);
 }
 
-/**
- * Add the correct vertical alignment in Chrome, Firefox, and Opera.
- */
+h3 {
+  @include type-layout(l, 1);
+  @include margin(1 0, l);
+}
 
-progress {
-  vertical-align: baseline;
+h4 {
+  @include type-layout(m, 1);
+  @include margin(1 0, m);
 }
 
-/**
- * Add the correct display in IE <11, Safari <8, and Firefox <22.
- * 1. Add the correct display in IE.
- */
+h5 {
+  @include type-layout(s, 1);
+  @include margin(1 0, s);
+}
 
-template, /* 1 */
-[hidden] {
-  display: none;
+h6 {
+  @include type-layout(xs, 1);
+  @include margin(1 0, xs);
 }
 
 /* Links
@@ -169,43 +160,6 @@ dfn {
   font-style: italic;
 }
 
-/**
- * Correct the font size and margin on `h1` elements within `section` and
- * `article` contexts in Chrome, Firefox, and Safari.
- */
-
-h1 {
-  @include type-layout(xxl, 2);
-
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  @include margin(1 0, xxl);
-}
-
-h2 {
-  @include type-layout(xl, 1.5);
-  @include margin(1 0, xl);
-}
-
-h3 {
-  @include type-layout(l, 1);
-  @include margin(1 0, l);
-}
-
-h4 {
-  @include type-layout(m, 1);
-  @include margin(1 0, m);
-}
-
-h5 {
-  @include type-layout(s, 1);
-  @include margin(1 0, s);
-}
-
-h6 {
-  @include type-layout(xs, 1);
-  @include margin(1 0, xs);
-}
-
 /**
  * Add the correct background and color in IE <10.
  */
@@ -247,6 +201,24 @@ sup {
 /* Embedded content
    ========================================================================== */
 
+/**
+ * Add the correct display in IE 9-.
+ */
+
+audio,
+video {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
 /**
  * Remove the border on images inside links in IE <11.
  */
@@ -303,6 +275,15 @@ ul {
   padding: 0 0 0 $indent-amount;
 }
 
+/**
+ * Add the correct display in IE 9-.
+ */
+
+figcaption,
+figure {
+  display: block;
+}
+
 /**
  * Add the correct margin in IE 8.
  */
@@ -322,6 +303,14 @@ hr {
   overflow: visible; /* 2 */
 }
 
+/**
+ * Add the correct display in IE.
+ */
+
+main {
+  display: block;
+}
+
 /**
  * Set 1 unit of vertical rhythm on the top and bottom margin.
  */
@@ -527,6 +516,16 @@ optgroup {
   font-weight: bold;
 }
 
+/**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+
+progress {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
 /**
  * Remove the default vertical scrollbar in IE.
  */
@@ -534,3 +533,54 @@ optgroup {
 textarea {
   overflow: auto;
 }
+
+/* Interactive
+   ========================================================================== */
+
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+
+details, /* 1 */
+menu {
+  display: block;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Scripting
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+canvas {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+template {
+  display: none;
+}
+
+/* Hidden
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 10-.
+ */
+
+[hidden] {
+  display: none;
+}
diff --git a/sass/normalize/_normalize-mixin.scss b/sass/normalize/_normalize-mixin.scss
index 198991063..bf1df1a90 100644
--- a/sass/normalize/_normalize-mixin.scss
+++ b/sass/normalize/_normalize-mixin.scss
@@ -73,8 +73,8 @@
     }
   }
 
-  @if _normalize-include(html5) {
-    /* HTML5 display definitions
+  @if _normalize-include(sections) {
+    /* Sections
        ========================================================================== */
 
     /**
@@ -86,62 +86,63 @@
     }
 
     /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 
     article,
     aside,
-    details,
-    figcaption,
-    figure,
     footer,
     header,
-    main,
-    menu,
     nav,
-    section,
-    summary {
+    section {
       display: block;
     }
 
     /**
-     * Add the correct display in IE <10.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
 
-    audio,
-    canvas,
-    progress,
-    video {
-      display: inline-block;
-    }
-
-    /**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
+    h1 {
+      @include normalize-font-size($h1-font-size);
+      @if $normalize-vertical-rhythm {
+        @include normalize-line-height($h1-font-size);
+      }
 
-    audio:not([controls]) {
-      display: none;
-      height: 0;
+      /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+      @include normalize-margin(1 0, $h1-font-size);
     }
 
-    /**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
+    @if $normalize-vertical-rhythm {
+      h2 {
+        @include normalize-font-size($h2-font-size);
+        @include normalize-line-height($h2-font-size);
+        @include normalize-margin(1 0, $h2-font-size);
+      }
 
-    progress {
-      vertical-align: baseline;
-    }
+      h3 {
+        @include normalize-font-size($h3-font-size);
+        @include normalize-line-height($h3-font-size);
+        @include normalize-margin(1 0, $h3-font-size);
+      }
 
-    /**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
+      h4 {
+        @include normalize-font-size($h4-font-size);
+        @include normalize-line-height($h4-font-size);
+        @include normalize-margin(1 0, $h4-font-size);
+      }
 
-    template, /* 1 */
-    [hidden] {
-      display: none;
+      h5 {
+        @include normalize-font-size($h5-font-size);
+        @include normalize-line-height($h5-font-size);
+        @include normalize-margin(1 0, $h5-font-size);
+      }
+
+      h6 {
+        @include normalize-font-size($h6-font-size);
+        @include normalize-line-height($h6-font-size);
+        @include normalize-margin(1 0, $h6-font-size);
+      }
     }
   }
 
@@ -223,53 +224,6 @@
       font-style: italic;
     }
 
-    /**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-
-    h1 {
-      @include normalize-font-size($h1-font-size);
-      @if $normalize-vertical-rhythm {
-        @include normalize-line-height($h1-font-size);
-      }
-
-      /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-      @include normalize-margin(1 0, $h1-font-size);
-    }
-
-    @if $normalize-vertical-rhythm {
-      h2 {
-        @include normalize-font-size($h2-font-size);
-        @include normalize-line-height($h2-font-size);
-        @include normalize-margin(1 0, $h2-font-size);
-      }
-
-      h3 {
-        @include normalize-font-size($h3-font-size);
-        @include normalize-line-height($h3-font-size);
-        @include normalize-margin(1 0, $h3-font-size);
-      }
-
-      h4 {
-        @include normalize-font-size($h4-font-size);
-        @include normalize-line-height($h4-font-size);
-        @include normalize-margin(1 0, $h4-font-size);
-      }
-
-      h5 {
-        @include normalize-font-size($h5-font-size);
-        @include normalize-line-height($h5-font-size);
-        @include normalize-margin(1 0, $h5-font-size);
-      }
-
-      h6 {
-        @include normalize-font-size($h6-font-size);
-        @include normalize-line-height($h6-font-size);
-        @include normalize-margin(1 0, $h6-font-size);
-      }
-    }
-
     /**
      * Add the correct background and color in IE <10.
      */
@@ -313,6 +267,24 @@
     /* Embedded content
        ========================================================================== */
 
+    /**
+     * Add the correct display in IE <10.
+     */
+
+    audio,
+    video {
+      display: inline-block;
+    }
+
+    /**
+     * Add the correct display and remove excess height in iOS 4-7.
+     */
+
+    audio:not([controls]) {
+      display: none;
+      height: 0;
+    }
+
     /**
      * Remove the border on images inside links in IE <11.
      */
@@ -601,6 +573,16 @@
       font-weight: bold;
     }
 
+    /**
+     * 1. Add the correct display in IE 9-.
+     * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+     */
+
+    progress {
+      display: inline-block; /* 1 */
+      vertical-align: baseline; /* 2 */
+    }
+
     /**
      * Remove the default vertical scrollbar in IE.
      */
@@ -609,4 +591,61 @@
       overflow: auto;
     }
   }
+
+  @if _normalize-include(interactive) {
+    /* Interactive
+       ========================================================================== */
+
+    /*
+     * Add the correct display in IE 9-.
+     * 1. Add the correct display in Edge, IE, and Firefox.
+     */
+
+    details, /* 1 */
+    menu {
+      display: block;
+    }
+
+    /*
+     * Add the correct display in all browsers.
+     */
+
+    summary {
+      display: list-item;
+    }
+  }
+
+  @if _normalize-include(scripting) {
+    /* Scripting
+       ========================================================================== */
+
+    /**
+     * Add the correct display in IE 9-.
+     */
+
+    canvas {
+      display: inline-block;
+    }
+
+    /**
+     * Add the correct display in IE.
+     */
+
+    template {
+      display: none;
+    }
+  }
+
+  @if _normalize-include(hidden) {
+    /* Hidden
+       ========================================================================== */
+
+    /**
+     * Add the correct display in IE 10-.
+     */
+
+    [hidden] {
+      display: none;
+    }
+  }
 }
diff --git a/test/fixtures/fork-versions/default/output.css b/test/fixtures/fork-versions/default/output.css
index f32df3a8c..222571ba0 100644
--- a/test/fixtures/fork-versions/default/output.css
+++ b/test/fixtures/fork-versions/default/output.css
@@ -17,7 +17,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
    ========================================================================== */
 /**
  * Remove the margin in all browsers (opinionated).
@@ -26,53 +26,24 @@ body {
   margin: 0; }
 
 /**
- * Add the correct display in IE <10.
- * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
- * Add the correct display in IE for `main`.
+ * Add the correct display in IE 9-.
  */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
- * Add the correct display in IE <10.
- */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
- * Add the correct display and remove excess height in iOS 4-7.
- */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
- * Add the correct vertical alignment in Chrome, Firefox, and Opera.
- */
-progress {
-  vertical-align: baseline; }
-
-/**
- * Add the correct display in IE <11, Safari <8, and Firefox <22.
- * 1. Add the correct display in IE.
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
  */
-template,
-[hidden] {
-  display: none; }
+h1 {
+  font-size: 2em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 0.75em 0; }
 
 /* Links
    ========================================================================== */
@@ -141,15 +112,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
- * Correct the font size and margin on `h1` elements within `section` and
- * `article` contexts in Chrome, Firefox, and Safari.
- */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
 /**
  * Add the correct background and color in IE <10.
  */
@@ -182,6 +144,20 @@ sup {
 
 /* Embedded content
    ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+audio,
+video {
+  display: inline-block; }
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
  * Remove the border on images inside links in IE <11.
  */
@@ -196,6 +172,13 @@ svg:not(:root) {
 
 /* Grouping content
    ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+figcaption,
+figure {
+  display: block; }
+
 /**
  * Add the correct margin in IE 8.
  */
@@ -214,6 +197,12 @@ hr {
   overflow: visible;
   /* 2 */ }
 
+/**
+ * Add the correct display in IE.
+ */
+main {
+  display: block; }
+
 /* Forms
    ========================================================================== */
 /**
@@ -388,8 +377,56 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
  * Remove the default vertical scrollbar in IE.
  */
 textarea {
   overflow: auto; }
+
+/* Interactive
+   ========================================================================== */
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+details,
+menu {
+  display: block; }
+
+/*
+ * Add the correct display in all browsers.
+ */
+summary {
+  display: list-item; }
+
+/* Scripting
+   ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+canvas {
+  display: inline-block; }
+
+/**
+ * Add the correct display in IE.
+ */
+template {
+  display: none; }
+
+/* Hidden
+   ========================================================================== */
+/**
+ * Add the correct display in IE 10-.
+ */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/fork-versions/deprecated-compass/output.css b/test/fixtures/fork-versions/deprecated-compass/output.css
index dc434caeb..c8fc71144 100644
--- a/test/fixtures/fork-versions/deprecated-compass/output.css
+++ b/test/fixtures/fork-versions/deprecated-compass/output.css
@@ -25,7 +25,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 2 */ }
 
-/* HTML5 display definitions
+/* Sections
    ========================================================================== */
 /**
  * Remove the margin in all browsers (opinionated).
@@ -34,53 +34,26 @@ body {
   margin: 0; }
 
 /**
- * Add the correct display in IE <10.
- * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
- * Add the correct display in IE for `main`.
+ * Add the correct display in IE 9-.
  */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
- * Add the correct display in IE <10.
- */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
- * Add the correct display and remove excess height in iOS 4-7.
- */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
- * Add the correct vertical alignment in Chrome, Firefox, and Opera.
- */
-progress {
-  vertical-align: baseline; }
-
-/**
- * Add the correct display in IE <11, Safari <8, and Firefox <22.
- * 1. Add the correct display in IE.
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
  */
-template,
-[hidden] {
-  display: none; }
+h1 {
+  /* Set the font-size and line-height while keeping a proper vertical rhythm. */
+  font-size: 2em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin-top: 0.75em;
+  margin-bottom: 0.75em; }
 
 /* Links
    ========================================================================== */
@@ -149,17 +122,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
- * Correct the font size and margin on `h1` elements within `section` and
- * `article` contexts in Chrome, Firefox, and Safari.
- */
-h1 {
-  /* Set the font-size and line-height while keeping a proper vertical rhythm. */
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin-top: 0.75em;
-  margin-bottom: 0.75em; }
-
 /**
  * Add the correct background and color in IE <10.
  */
@@ -192,6 +154,20 @@ sup {
 
 /* Embedded content
    ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+audio,
+video {
+  display: inline-block; }
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
  * Remove the border on images inside links in IE <11.
  */
@@ -206,6 +182,13 @@ svg:not(:root) {
 
 /* Grouping content
    ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+figcaption,
+figure {
+  display: block; }
+
 /**
  * Add the correct margin in IE 8.
  */
@@ -226,6 +209,12 @@ hr {
   overflow: visible;
   /* 2 */ }
 
+/**
+ * Add the correct display in IE.
+ */
+main {
+  display: block; }
+
 /* Forms
    ========================================================================== */
 /**
@@ -414,8 +403,56 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
  * Remove the default vertical scrollbar in IE.
  */
 textarea {
   overflow: auto; }
+
+/* Interactive
+   ========================================================================== */
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+details,
+menu {
+  display: block; }
+
+/*
+ * Add the correct display in all browsers.
+ */
+summary {
+  display: list-item; }
+
+/* Scripting
+   ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+canvas {
+  display: inline-block; }
+
+/**
+ * Add the correct display in IE.
+ */
+template {
+  display: none; }
+
+/* Hidden
+   ========================================================================== */
+/**
+ * Add the correct display in IE 10-.
+ */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/fork-versions/typey-chroma-kss/output.css b/test/fixtures/fork-versions/typey-chroma-kss/output.css
index aa7c14471..bed0d1b39 100644
--- a/test/fixtures/fork-versions/typey-chroma-kss/output.css
+++ b/test/fixtures/fork-versions/typey-chroma-kss/output.css
@@ -19,64 +19,12 @@ body {
 
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-progress {
-  vertical-align: baseline; }
-
-template,
-[hidden] {
-  display: none; }
-
-a {
-  color: #0072b9;
-  -webkit-text-decoration-skip: objects; }
-
-:visited {
-  color: #003353; }
-
-a:active {
-  color: #c00; }
-  a:active:not(.button) {
-    background-color: transparent; }
-
-a:active,
-a:hover {
-  outline-width: 0; }
-
-@media print {
-  :link,
-  :visited {
-    text-decoration: underline; }
-  a[href]:after {
-    content: " (" attr(href) ")";
-    font-weight: normal;
-    font-size: 16px;
-    text-decoration: none; }
-  a[href^='javascript:']:after,
-  a[href^='#']:after {
-    content: ''; } }
-
 h1 {
   font-size: 2rem;
   line-height: 3rem;
@@ -113,6 +61,35 @@ h6 {
   margin-top: 1.5rem;
   margin-bottom: 1.5rem; }
 
+a {
+  color: #0072b9;
+  -webkit-text-decoration-skip: objects; }
+
+:visited {
+  color: #003353; }
+
+a:active {
+  color: #c00; }
+  a:active:not(.button) {
+    background-color: transparent; }
+
+a:active,
+a:hover {
+  outline-width: 0; }
+
+@media print {
+  :link,
+  :visited {
+    text-decoration: underline; }
+  a[href]:after {
+    content: " (" attr(href) ")";
+    font-weight: normal;
+    font-size: 16px;
+    text-decoration: none; }
+  a[href^='javascript:']:after,
+  a[href^='#']:after {
+    content: ''; } }
+
 abbr[title] {
   border-bottom: 0;
   text-decoration: underline;
@@ -203,6 +180,13 @@ p,
 pre {
   margin: 1.5rem 0; }
 
+audio {
+  display: inline-block; }
+
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 img {
   border-style: none; }
 
@@ -214,6 +198,9 @@ svg {
 svg:not(:root) {
   overflow: hidden; }
 
+video {
+  display: inline-block; }
+
 button,
 input,
 optgroup,
@@ -344,6 +331,10 @@ legend {
 optgroup {
   font-weight: bold; }
 
+progress {
+  display: inline-block;
+  vertical-align: baseline; }
+
 textarea {
   overflow: auto; }
 
@@ -356,3 +347,21 @@ table {
 td,
 th {
   padding: 0; }
+
+details {
+  display: block; }
+
+summary {
+  display: list-item; }
+
+menu {
+  display: block; }
+
+canvas {
+  display: inline-block; }
+
+template {
+  display: none; }
+
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/fork-versions/typey/output.css b/test/fixtures/fork-versions/typey/output.css
index 8ab9b40e3..949d267b2 100644
--- a/test/fixtures/fork-versions/typey/output.css
+++ b/test/fixtures/fork-versions/typey/output.css
@@ -21,7 +21,7 @@ html {
     html {
       font-size: 12pt; } }
 
-/* HTML5 display definitions
+/* Sections
    ========================================================================== */
 /**
  * Remove the margin in all browsers (opinionated).
@@ -30,53 +30,50 @@ body {
   margin: 0; }
 
 /**
- * Add the correct display in IE <10.
- * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
- * Add the correct display in IE for `main`.
+ * Add the correct display in IE 9-.
  */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
- * Add the correct display in IE <10.
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
  */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
+h1 {
+  font-size: 2rem;
+  line-height: 3rem;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 1.5rem 0; }
 
-/**
- * Add the correct display and remove excess height in iOS 4-7.
- */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
+h2 {
+  font-size: 1.5rem;
+  line-height: 2.25rem;
+  margin: 1.5rem 0; }
 
-/**
- * Add the correct vertical alignment in Chrome, Firefox, and Opera.
- */
-progress {
-  vertical-align: baseline; }
+h3 {
+  font-size: 1.25rem;
+  line-height: 1.5rem;
+  margin: 1.5rem 0; }
 
-/**
- * Add the correct display in IE <11, Safari <8, and Firefox <22.
- * 1. Add the correct display in IE.
- */
-template,
-[hidden] {
-  display: none; }
+h4 {
+  font-size: 1rem;
+  line-height: 1.5rem;
+  margin: 1.5rem 0; }
+
+h5 {
+  font-size: 0.875rem;
+  line-height: 1.5rem;
+  margin: 1.5rem 0; }
+
+h6 {
+  font-size: 0.625rem;
+  line-height: 1.5rem;
+  margin: 1.5rem 0; }
 
 /* Links
    ========================================================================== */
@@ -145,41 +142,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
- * Correct the font size and margin on `h1` elements within `section` and
- * `article` contexts in Chrome, Firefox, and Safari.
- */
-h1 {
-  font-size: 2rem;
-  line-height: 3rem;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 1.5rem 0; }
-
-h2 {
-  font-size: 1.5rem;
-  line-height: 2.25rem;
-  margin: 1.5rem 0; }
-
-h3 {
-  font-size: 1.25rem;
-  line-height: 1.5rem;
-  margin: 1.5rem 0; }
-
-h4 {
-  font-size: 1rem;
-  line-height: 1.5rem;
-  margin: 1.5rem 0; }
-
-h5 {
-  font-size: 0.875rem;
-  line-height: 1.5rem;
-  margin: 1.5rem 0; }
-
-h6 {
-  font-size: 0.625rem;
-  line-height: 1.5rem;
-  margin: 1.5rem 0; }
-
 /**
  * Add the correct background and color in IE <10.
  */
@@ -212,6 +174,20 @@ sup {
 
 /* Embedded content
    ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+audio,
+video {
+  display: inline-block; }
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
  * Remove the border on images inside links in IE <11.
  */
@@ -255,6 +231,13 @@ ol,
 ul {
   padding: 0 0 0 40px; }
 
+/**
+ * Add the correct display in IE 9-.
+ */
+figcaption,
+figure {
+  display: block; }
+
 /**
  * Add the correct margin in IE 8.
  */
@@ -273,6 +256,12 @@ hr {
   overflow: visible;
   /* 2 */ }
 
+/**
+ * Add the correct display in IE.
+ */
+main {
+  display: block; }
+
 /**
  * Set 1 unit of vertical rhythm on the top and bottom margin.
  */
@@ -454,8 +443,56 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
  * Remove the default vertical scrollbar in IE.
  */
 textarea {
   overflow: auto; }
+
+/* Interactive
+   ========================================================================== */
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+details,
+menu {
+  display: block; }
+
+/*
+ * Add the correct display in all browsers.
+ */
+summary {
+  display: list-item; }
+
+/* Scripting
+   ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+canvas {
+  display: inline-block; }
+
+/**
+ * Add the correct display in IE.
+ */
+template {
+  display: none; }
+
+/* Hidden
+   ========================================================================== */
+/**
+ * Add the correct display in IE 10-.
+ */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/import-now/output.css b/test/fixtures/import-now/output.css
index 66cfe7fdc..21b8a2b14 100644
--- a/test/fixtures/import-now/output.css
+++ b/test/fixtures/import-now/output.css
@@ -17,7 +17,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
        ========================================================================== */
 /**
      * Remove the margin in all browsers (opinionated).
@@ -26,53 +26,24 @@ body {
   margin: 0; }
 
 /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
-template,
-[hidden] {
-  display: none; }
+h1 {
+  font-size: 2em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 0.75em 0; }
 
 /* Links
        ========================================================================== */
@@ -138,15 +109,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
 /**
      * Add the correct background and color in IE <10.
      */
@@ -179,6 +141,20 @@ sup {
 
 /* Embedded content
        ========================================================================== */
+/**
+     * Add the correct display in IE <10.
+     */
+audio,
+video {
+  display: inline-block; }
+
+/**
+     * Add the correct display and remove excess height in iOS 4-7.
+     */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
      * Remove the border on images inside links in IE <11.
      */
@@ -389,8 +365,56 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+     * 1. Add the correct display in IE 9-.
+     * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+     */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
      * Remove the default vertical scrollbar in IE.
      */
 textarea {
   overflow: auto; }
+
+/* Interactive
+       ========================================================================== */
+/*
+     * Add the correct display in IE 9-.
+     * 1. Add the correct display in Edge, IE, and Firefox.
+     */
+details,
+menu {
+  display: block; }
+
+/*
+     * Add the correct display in all browsers.
+     */
+summary {
+  display: list-item; }
+
+/* Scripting
+       ========================================================================== */
+/**
+     * Add the correct display in IE 9-.
+     */
+canvas {
+  display: inline-block; }
+
+/**
+     * Add the correct display in IE.
+     */
+template {
+  display: none; }
+
+/* Hidden
+       ========================================================================== */
+/**
+     * Add the correct display in IE 10-.
+     */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/normalize/exclude-multiple/output.css b/test/fixtures/normalize/exclude-multiple/output.css
index d5b10bd0a..d942234b2 100644
--- a/test/fixtures/normalize/exclude-multiple/output.css
+++ b/test/fixtures/normalize/exclude-multiple/output.css
@@ -17,7 +17,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
        ========================================================================== */
 /**
      * Remove the margin in all browsers (opinionated).
@@ -26,53 +26,24 @@ body {
   margin: 0; }
 
 /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
-template,
-[hidden] {
-  display: none; }
+h1 {
+  font-size: 2em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 0.75em 0; }
 
 /* Links
        ========================================================================== */
@@ -138,15 +109,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
 /**
      * Add the correct background and color in IE <10.
      */
@@ -351,8 +313,56 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+     * 1. Add the correct display in IE 9-.
+     * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+     */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
      * Remove the default vertical scrollbar in IE.
      */
 textarea {
   overflow: auto; }
+
+/* Interactive
+       ========================================================================== */
+/*
+     * Add the correct display in IE 9-.
+     * 1. Add the correct display in Edge, IE, and Firefox.
+     */
+details,
+menu {
+  display: block; }
+
+/*
+     * Add the correct display in all browsers.
+     */
+summary {
+  display: list-item; }
+
+/* Scripting
+       ========================================================================== */
+/**
+     * Add the correct display in IE 9-.
+     */
+canvas {
+  display: inline-block; }
+
+/**
+     * Add the correct display in IE.
+     */
+template {
+  display: none; }
+
+/* Hidden
+       ========================================================================== */
+/**
+     * Add the correct display in IE 10-.
+     */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/normalize/exclude-single/output.css b/test/fixtures/normalize/exclude-single/output.css
index b0f2f395c..2d72c0d11 100644
--- a/test/fixtures/normalize/exclude-single/output.css
+++ b/test/fixtures/normalize/exclude-single/output.css
@@ -17,7 +17,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
        ========================================================================== */
 /**
      * Remove the margin in all browsers (opinionated).
@@ -26,53 +26,24 @@ body {
   margin: 0; }
 
 /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
-template,
-[hidden] {
-  display: none; }
+h1 {
+  font-size: 2em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 0.75em 0; }
 
 /* Links
        ========================================================================== */
@@ -138,15 +109,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
 /**
      * Add the correct background and color in IE <10.
      */
@@ -179,6 +141,20 @@ sup {
 
 /* Embedded content
        ========================================================================== */
+/**
+     * Add the correct display in IE <10.
+     */
+audio,
+video {
+  display: inline-block; }
+
+/**
+     * Add the correct display and remove excess height in iOS 4-7.
+     */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
      * Remove the border on images inside links in IE <11.
      */
@@ -214,3 +190,41 @@ hr {
 pre {
   font-family: monospace, monospace;
   font-size: 1em; }
+
+/* Interactive
+       ========================================================================== */
+/*
+     * Add the correct display in IE 9-.
+     * 1. Add the correct display in Edge, IE, and Firefox.
+     */
+details,
+menu {
+  display: block; }
+
+/*
+     * Add the correct display in all browsers.
+     */
+summary {
+  display: list-item; }
+
+/* Scripting
+       ========================================================================== */
+/**
+     * Add the correct display in IE 9-.
+     */
+canvas {
+  display: inline-block; }
+
+/**
+     * Add the correct display in IE.
+     */
+template {
+  display: none; }
+
+/* Hidden
+       ========================================================================== */
+/**
+     * Add the correct display in IE 10-.
+     */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/normalize/exclude-string/input.scss b/test/fixtures/normalize/exclude-string/input.scss
index b34be634f..9c070c41d 100644
--- a/test/fixtures/normalize/exclude-string/input.scss
+++ b/test/fixtures/normalize/exclude-string/input.scss
@@ -1,2 +1,2 @@
 @import 'normalize';
-@include normalize($exclude: tables);
+@include normalize($exclude: scripting);
diff --git a/test/fixtures/normalize/exclude-string/output.css b/test/fixtures/normalize/exclude-string/output.css
index 66cfe7fdc..9d9c2e093 100644
--- a/test/fixtures/normalize/exclude-string/output.css
+++ b/test/fixtures/normalize/exclude-string/output.css
@@ -17,7 +17,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
        ========================================================================== */
 /**
      * Remove the margin in all browsers (opinionated).
@@ -26,53 +26,24 @@ body {
   margin: 0; }
 
 /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
-template,
-[hidden] {
-  display: none; }
+h1 {
+  font-size: 2em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 0.75em 0; }
 
 /* Links
        ========================================================================== */
@@ -138,15 +109,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
 /**
      * Add the correct background and color in IE <10.
      */
@@ -179,6 +141,20 @@ sup {
 
 /* Embedded content
        ========================================================================== */
+/**
+     * Add the correct display in IE <10.
+     */
+audio,
+video {
+  display: inline-block; }
+
+/**
+     * Add the correct display and remove excess height in iOS 4-7.
+     */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
      * Remove the border on images inside links in IE <11.
      */
@@ -389,8 +365,42 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+     * 1. Add the correct display in IE 9-.
+     * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+     */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
      * Remove the default vertical scrollbar in IE.
      */
 textarea {
   overflow: auto; }
+
+/* Interactive
+       ========================================================================== */
+/*
+     * Add the correct display in IE 9-.
+     * 1. Add the correct display in Edge, IE, and Firefox.
+     */
+details,
+menu {
+  display: block; }
+
+/*
+     * Add the correct display in all browsers.
+     */
+summary {
+  display: list-item; }
+
+/* Hidden
+       ========================================================================== */
+/**
+     * Add the correct display in IE 10-.
+     */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/normalize/include-multiple/input.scss b/test/fixtures/normalize/include-multiple/input.scss
index 242dc1942..4ce2f615e 100644
--- a/test/fixtures/normalize/include-multiple/input.scss
+++ b/test/fixtures/normalize/include-multiple/input.scss
@@ -1,2 +1,2 @@
 @import 'normalize';
-@include normalize((document html5));
+@include normalize((document sections));
diff --git a/test/fixtures/normalize/include-multiple/output.css b/test/fixtures/normalize/include-multiple/output.css
index d35981da8..b730126c6 100644
--- a/test/fixtures/normalize/include-multiple/output.css
+++ b/test/fixtures/normalize/include-multiple/output.css
@@ -17,7 +17,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
        ========================================================================== */
 /**
      * Remove the margin in all browsers (opinionated).
@@ -26,50 +26,21 @@ body {
   margin: 0; }
 
 /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
-     * Add the correct display in IE <10.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
+h1 {
+  font-size: 2em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 0.75em 0; }
diff --git a/test/fixtures/normalize/include-string/output.css b/test/fixtures/normalize/include-string/output.css
index 89b6b5737..49004bf58 100644
--- a/test/fixtures/normalize/include-string/output.css
+++ b/test/fixtures/normalize/include-string/output.css
@@ -43,15 +43,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
 /**
      * Add the correct background and color in IE <10.
      */
diff --git a/test/fixtures/variables/default/output.css b/test/fixtures/variables/default/output.css
index 66cfe7fdc..21b8a2b14 100644
--- a/test/fixtures/variables/default/output.css
+++ b/test/fixtures/variables/default/output.css
@@ -17,7 +17,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
        ========================================================================== */
 /**
      * Remove the margin in all browsers (opinionated).
@@ -26,53 +26,24 @@ body {
   margin: 0; }
 
 /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
-template,
-[hidden] {
-  display: none; }
+h1 {
+  font-size: 2em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 0.75em 0; }
 
 /* Links
        ========================================================================== */
@@ -138,15 +109,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
 /**
      * Add the correct background and color in IE <10.
      */
@@ -179,6 +141,20 @@ sup {
 
 /* Embedded content
        ========================================================================== */
+/**
+     * Add the correct display in IE <10.
+     */
+audio,
+video {
+  display: inline-block; }
+
+/**
+     * Add the correct display and remove excess height in iOS 4-7.
+     */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
      * Remove the border on images inside links in IE <11.
      */
@@ -389,8 +365,56 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+     * 1. Add the correct display in IE 9-.
+     * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+     */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
      * Remove the default vertical scrollbar in IE.
      */
 textarea {
   overflow: auto; }
+
+/* Interactive
+       ========================================================================== */
+/*
+     * Add the correct display in IE 9-.
+     * 1. Add the correct display in Edge, IE, and Firefox.
+     */
+details,
+menu {
+  display: block; }
+
+/*
+     * Add the correct display in all browsers.
+     */
+summary {
+  display: list-item; }
+
+/* Scripting
+       ========================================================================== */
+/**
+     * Add the correct display in IE 9-.
+     */
+canvas {
+  display: inline-block; }
+
+/**
+     * Add the correct display in IE.
+     */
+template {
+  display: none; }
+
+/* Hidden
+       ========================================================================== */
+/**
+     * Add the correct display in IE 10-.
+     */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/variables/font/output.css b/test/fixtures/variables/font/output.css
index 5adaedd14..9236aefff 100644
--- a/test/fixtures/variables/font/output.css
+++ b/test/fixtures/variables/font/output.css
@@ -18,7 +18,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
        ========================================================================== */
 /**
      * Remove the margin in all browsers (opinionated).
@@ -27,53 +27,50 @@ body {
   margin: 0; }
 
 /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
-     * Add the correct display in IE <10.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
+h1 {
+  font-size: 3rem;
+  line-height: 4.5rem;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 1.5rem 0; }
 
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
+h2 {
+  font-size: 2rem;
+  line-height: 3rem;
+  margin: 1.5rem 0; }
 
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
+h3 {
+  font-size: 1.5rem;
+  line-height: 3rem;
+  margin: 1.5rem 0; }
 
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
+h4 {
+  font-size: 0.9rem;
+  line-height: 1.5rem;
+  margin: 1.5rem 0; }
+
+h5 {
+  font-size: 0.75rem;
+  line-height: 1.5rem;
+  margin: 1.5rem 0; }
+
+h6 {
+  font-size: 0.5rem;
+  line-height: 1.5rem;
+  margin: 1.5rem 0; }
 
 /* Links
        ========================================================================== */
@@ -139,41 +136,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 3rem;
-  line-height: 4.5rem;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 1.5rem 0; }
-
-h2 {
-  font-size: 2rem;
-  line-height: 3rem;
-  margin: 1.5rem 0; }
-
-h3 {
-  font-size: 1.5rem;
-  line-height: 3rem;
-  margin: 1.5rem 0; }
-
-h4 {
-  font-size: 0.9rem;
-  line-height: 1.5rem;
-  margin: 1.5rem 0; }
-
-h5 {
-  font-size: 0.75rem;
-  line-height: 1.5rem;
-  margin: 1.5rem 0; }
-
-h6 {
-  font-size: 0.5rem;
-  line-height: 1.5rem;
-  margin: 1.5rem 0; }
-
 /**
      * Add the correct background and color in IE <10.
      */
@@ -206,6 +168,20 @@ sup {
 
 /* Embedded content
        ========================================================================== */
+/**
+     * Add the correct display in IE <10.
+     */
+audio,
+video {
+  display: inline-block; }
+
+/**
+     * Add the correct display and remove excess height in iOS 4-7.
+     */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
      * Remove the border on images inside links in IE <11.
      */
@@ -452,8 +428,56 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+     * 1. Add the correct display in IE 9-.
+     * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+     */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
      * Remove the default vertical scrollbar in IE.
      */
 textarea {
   overflow: auto; }
+
+/* Interactive
+       ========================================================================== */
+/*
+     * Add the correct display in IE 9-.
+     * 1. Add the correct display in Edge, IE, and Firefox.
+     */
+details,
+menu {
+  display: block; }
+
+/*
+     * Add the correct display in all browsers.
+     */
+summary {
+  display: list-item; }
+
+/* Scripting
+       ========================================================================== */
+/**
+     * Add the correct display in IE 9-.
+     */
+canvas {
+  display: inline-block; }
+
+/**
+     * Add the correct display in IE.
+     */
+template {
+  display: none; }
+
+/* Hidden
+       ========================================================================== */
+/**
+     * Add the correct display in IE 10-.
+     */
+[hidden] {
+  display: none; }
diff --git a/test/fixtures/variables/indent-amount/output.css b/test/fixtures/variables/indent-amount/output.css
index b7158f87f..ddca8b3c5 100644
--- a/test/fixtures/variables/indent-amount/output.css
+++ b/test/fixtures/variables/indent-amount/output.css
@@ -18,7 +18,7 @@ html {
   -webkit-text-size-adjust: 100%;
   /* 3 */ }
 
-/* HTML5 display definitions
+/* Sections
        ========================================================================== */
 /**
      * Remove the margin in all browsers (opinionated).
@@ -27,53 +27,50 @@ body {
   margin: 0; }
 
 /**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
+     * Add the correct display in IE 9-.
      */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
+section {
   display: block; }
 
 /**
-     * Add the correct display in IE <10.
+     * Correct the font size and margin on `h1` elements within `section` and
+     * `article` contexts in Chrome, Firefox, and Safari.
      */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
+h1 {
+  font-size: 2em;
+  line-height: 1.5em;
+  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
+  margin: 0.75em 0; }
 
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
+h2 {
+  font-size: 1.5em;
+  line-height: 2em;
+  margin: 1em 0; }
 
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
+h3 {
+  font-size: 1.17em;
+  line-height: 1.28205em;
+  margin: 1.28205em 0; }
 
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
+h4 {
+  font-size: 1em;
+  line-height: 1.5em;
+  margin: 1.5em 0; }
+
+h5 {
+  font-size: 0.83em;
+  line-height: 1.80723em;
+  margin: 1.80723em 0; }
+
+h6 {
+  font-size: 0.67em;
+  line-height: 2.23881em;
+  margin: 2.23881em 0; }
 
 /* Links
        ========================================================================== */
@@ -139,41 +136,6 @@ samp {
 dfn {
   font-style: italic; }
 
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  line-height: 1.5em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-h2 {
-  font-size: 1.5em;
-  line-height: 2em;
-  margin: 1em 0; }
-
-h3 {
-  font-size: 1.17em;
-  line-height: 1.28205em;
-  margin: 1.28205em 0; }
-
-h4 {
-  font-size: 1em;
-  line-height: 1.5em;
-  margin: 1.5em 0; }
-
-h5 {
-  font-size: 0.83em;
-  line-height: 1.80723em;
-  margin: 1.80723em 0; }
-
-h6 {
-  font-size: 0.67em;
-  line-height: 2.23881em;
-  margin: 2.23881em 0; }
-
 /**
      * Add the correct background and color in IE <10.
      */
@@ -206,6 +168,20 @@ sup {
 
 /* Embedded content
        ========================================================================== */
+/**
+     * Add the correct display in IE <10.
+     */
+audio,
+video {
+  display: inline-block; }
+
+/**
+     * Add the correct display and remove excess height in iOS 4-7.
+     */
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
 /**
      * Remove the border on images inside links in IE <11.
      */
@@ -452,8 +428,56 @@ legend {
 optgroup {
   font-weight: bold; }
 
+/**
+     * 1. Add the correct display in IE 9-.
+     * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+     */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */ }
+
 /**
      * Remove the default vertical scrollbar in IE.
      */
 textarea {
   overflow: auto; }
+
+/* Interactive
+       ========================================================================== */
+/*
+     * Add the correct display in IE 9-.
+     * 1. Add the correct display in Edge, IE, and Firefox.
+     */
+details,
+menu {
+  display: block; }
+
+/*
+     * Add the correct display in all browsers.
+     */
+summary {
+  display: list-item; }
+
+/* Scripting
+       ========================================================================== */
+/**
+     * Add the correct display in IE 9-.
+     */
+canvas {
+  display: inline-block; }
+
+/**
+     * Add the correct display in IE.
+     */
+template {
+  display: none; }
+
+/* Hidden
+       ========================================================================== */
+/**
+     * Add the correct display in IE 10-.
+     */
+[hidden] {
+  display: none; }