diff --git a/docs/css/styles.css b/docs/css/styles.css
index 2120553..9f48d46 100644
--- a/docs/css/styles.css
+++ b/docs/css/styles.css
@@ -230,7 +230,7 @@ caption {
     overflow-x: hidden;
 }
 .intro-and-nav {
-    font-size: 0.85rem;
+    font-size: 0.8rem;
     width: 15rem;
     height: 100vh;
     position: fixed;
@@ -258,11 +258,10 @@ caption {
     max-width: 12rem;
 }
 .library-desc {
-    font-style: italic;
     margin-top: 0.5rem;
     margin-left: auto;
     margin-right: auto;
-    max-width: 30rem;
+    max-width: 25rem;
 }
 .main-and-footer {
     margin-left: 15rem;
@@ -318,7 +317,7 @@ caption {
 .pattern [aria-current] {
     background-color: #111;
     background-image: url(images/arrow_effect.svg);
-    background-position: right center;
+    background-position: 98% center;
     background-size: 125%;
     background-repeat: no-repeat;
     color: #fff;
@@ -656,6 +655,7 @@ h1 svg {
 }
 .print {
     white-space: nowrap;
+    font-style: normal;
 }
 .svg-outer {
     width: 0.75em;
diff --git a/docs/index.html b/docs/index.html
index 940eb62..0017d80 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -92,26 +92,32 @@
   </symbol>
 
   <symbol id="menu" viewBox="0 0 50 50">
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="0" x="0"/>
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="20" x="0"/>
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="40" x="0"/>
- </symbol>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="0" x="0"/>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="20" x="0"/>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="40" x="0"/>
+   </symbol>
 
- <symbol id="link" viewBox="0 0 50 50">
-  <g transform="translate(0 -1002.4)">
-   <g transform="matrix(.095670 0 0 .095670 2.3233 1004.9)">
-    <g>
-     <path style="stroke-width:0;fill:currentColor" d="m452.84 192.9-128.65 128.65c-35.535 35.54-93.108 35.54-128.65 0l-42.881-42.886 42.881-42.876 42.884 42.876c11.845 11.822 31.064 11.846 42.886 0l128.64-128.64c11.816-11.831 11.816-31.066 0-42.9l-42.881-42.881c-11.822-11.814-31.064-11.814-42.887 0l-45.928 45.936c-21.292-12.531-45.491-17.905-69.449-16.291l72.501-72.526c35.535-35.521 93.136-35.521 128.64 0l42.886 42.881c35.535 35.523 35.535 93.141-.001 128.66zm-254.28 168.51-45.903 45.9c-11.845 11.846-31.064 11.817-42.881 0l-42.884-42.881c-11.845-11.821-11.845-31.041 0-42.886l128.65-128.65c11.819-11.814 31.069-11.814 42.884 0l42.886 42.886 42.876-42.886-42.876-42.881c-35.54-35.521-93.113-35.521-128.65 0l-128.65 128.64c-35.538 35.545-35.538 93.146 0 128.65l42.883 42.882c35.51 35.54 93.11 35.54 128.65 0l72.496-72.499c-23.956 1.597-48.092-3.784-69.474-16.283z"/>
+   <symbol id="link" viewBox="0 0 50 50">
+    <g transform="translate(0 -1002.4)">
+     <g transform="matrix(.095670 0 0 .095670 2.3233 1004.9)">
+      <g>
+       <path style="stroke-width:0;fill:currentColor" d="m452.84 192.9-128.65 128.65c-35.535 35.54-93.108 35.54-128.65 0l-42.881-42.886 42.881-42.876 42.884 42.876c11.845 11.822 31.064 11.846 42.886 0l128.64-128.64c11.816-11.831 11.816-31.066 0-42.9l-42.881-42.881c-11.822-11.814-31.064-11.814-42.887 0l-45.928 45.936c-21.292-12.531-45.491-17.905-69.449-16.291l72.501-72.526c35.535-35.521 93.136-35.521 128.64 0l42.886 42.881c35.535 35.523 35.535 93.141-.001 128.66zm-254.28 168.51-45.903 45.9c-11.845 11.846-31.064 11.817-42.881 0l-42.884-42.881c-11.845-11.821-11.845-31.041 0-42.886l128.65-128.65c11.819-11.814 31.069-11.814 42.884 0l42.886 42.886 42.876-42.886-42.876-42.881c-35.54-35.521-93.113-35.521-128.65 0l-128.65 128.64c-35.538 35.545-35.538 93.146 0 128.65l42.883 42.882c35.51 35.54 93.11 35.54 128.65 0l72.496-72.499c-23.956 1.597-48.092-3.784-69.474-16.283z"/>
+      </g>
+     </g>
+    </g>
+  </symbol>
+
+  <symbol id="doc" viewBox="0 0 35 45">
+   <g transform="translate(-147.53 -539.83)">
+    <path style="stroke:currentColor;stroke-width:2.4501;fill:none" d="m149.38 542.67v39.194h31.354v-39.194z"/>
+    <g style="stroke-width:25" transform="matrix(.098003 0 0 .098003 133.69 525.96)">
+     <path d="m220 252.36h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
+     <path style="stroke:currentColor;stroke-width:25;fill:none" d="m220 409.95h200"/>
+     <path d="m220 488.74h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
+     <path d="m220 331.15h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
     </g>
    </g>
-  </g>
-</symbol>
-
-<symbol id="printer" viewBox="0 0 50 50">
- <g transform="translate(-25.001 -1002.4)">
-  <path style="fill:currentColor" d="m42.85 1008.1c-1.5847 0-2.8605 1.2758-2.8605 2.8605v7.1513h-8.5815c-1.5847 0-2.8605 1.2758-2.8605 2.8605v15.733c0 1.5847 1.2758 2.8605 2.8605 2.8605h8.9419v4.2908c0 1.5847 1.2758 2.8605 2.8605 2.8605h14.272c1.5847 0 2.8605-1.2758 2.8605-2.8605v-4.2908h8.2519c1.5847 0 2.8605-1.2758 2.8605-2.8605v-15.733c0-1.5847-1.2758-2.8605-2.8605-2.8605h-8.2519v-7.1513c0-1.5847-1.2758-2.8605-2.8605-2.8605h-14.632zm3.1147 3.0645h8.5815c1.5847 0 2.8119 1.2765 2.8605 2.8605l.12849 4.1623-14.303-.1259-.12849-4.0366c0-1.5847 1.2758-2.8605 2.8605-2.8605zm20.772 9.8078a2.0368 2.1326 0 0 1 .54472 .064 2.0368 2.1326 0 0 1 1.4833 2.5839l-.0029.014a2.0368 2.1326 0 0 1 -2.4749 1.542 2.0368 2.1326 0 0 1 -1.4749 -2.5895 2.0368 2.1326 0 0 1 1.9247 -1.6119zm-23.633 14.199h14.303v5.8243c0 1.5847-1.2758 2.8605-2.8605 2.8605h-8.5815c-1.5847 0-2.8605-1.2758-2.8605-2.8605v-5.8243zm3.5756 1.8939c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513zm0 2.8605c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513z"/>
- </g>
-</symbol>
+ </symbol>
 </svg>
 
     <div class="wrapper ">
@@ -125,11 +131,9 @@
                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
                   <a class="print" href="https://thepaciellogroup.github.io/infusion/print-version">
-                    <svg viewBox="0 0 50 50" aria-hidden="true">
-                     <g transform="translate(-25.001 -1002.4)">
-                      <path style="fill:#1a1a1a" d="m42.85 1008.1c-1.5847 0-2.8605 1.2758-2.8605 2.8605v7.1513h-8.5815c-1.5847 0-2.8605 1.2758-2.8605 2.8605v15.733c0 1.5847 1.2758 2.8605 2.8605 2.8605h8.9419v4.2908c0 1.5847 1.2758 2.8605 2.8605 2.8605h14.272c1.5847 0 2.8605-1.2758 2.8605-2.8605v-4.2908h8.2519c1.5847 0 2.8605-1.2758 2.8605-2.8605v-15.733c0-1.5847-1.2758-2.8605-2.8605-2.8605h-8.2519v-7.1513c0-1.5847-1.2758-2.8605-2.8605-2.8605h-14.632zm3.1147 3.0645h8.5815c1.5847 0 2.8119 1.2765 2.8605 2.8605l.12849 4.1623-14.303-.1259-.12849-4.0366c0-1.5847 1.2758-2.8605 2.8605-2.8605zm20.772 9.8078a2.0368 2.1326 0 0 1 .54472 .064 2.0368 2.1326 0 0 1 1.4833 2.5839l-.0029.014a2.0368 2.1326 0 0 1 -2.4749 1.542 2.0368 2.1326 0 0 1 -1.4749 -2.5895 2.0368 2.1326 0 0 1 1.9247 -1.6119zm-23.633 14.199h14.303v5.8243c0 1.5847-1.2758 2.8605-2.8605 2.8605h-8.5815c-1.5847 0-2.8605-1.2758-2.8605-2.8605v-5.8243zm3.5756 1.8939c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513zm0 2.8605c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513z"/>
-                     </g>
-                   </svg>Print version
+                    <svg viewBox="0 0 35 45" aria-hidden="true" focusable="false">
+                      <use xlink:href="#doc"></use>
+                    </svg>Print version
                  
                </a>
               </p>
@@ -138,7 +142,7 @@
             
               <nav id="patterns-nav" class="patterns" role="navigation">
                 <button id="menu-button" aria-expanded="false">
-                  <svg viewBox="0 0 50 50" width="50" height="50" focusable="false">
+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
                     <use xlink:href="#menu"></use>
                   </svg>
                   Menu
diff --git a/docs/js/dom-scripts.js b/docs/js/dom-scripts.js
index 5c75af6..d2c83a9 100644
--- a/docs/js/dom-scripts.js
+++ b/docs/js/dom-scripts.js
@@ -1,50 +1,50 @@
 /* expandable sections */
 (function () {
   function toggle (button, target) {
-    var expanded = button.getAttribute('aria-expanded') === 'true'
-    button.setAttribute('aria-expanded', !expanded)
-    target.hidden = !target.hidden
+    var expanded = button.getAttribute('aria-expanded') === 'true';
+    button.setAttribute('aria-expanded', !expanded);
+    target.hidden = !target.hidden;
   }
 
-  var expanders = document.querySelectorAll('[data-expands]')
+  var expanders = document.querySelectorAll('[data-expands]');
 
   Array.prototype.forEach.call(expanders, function (expander) {
-    var target = document.getElementById(expander.getAttribute('data-expands'))
+    var target = document.getElementById(expander.getAttribute('data-expands'));
 
     expander.addEventListener('click', function () {
-      toggle(expander, target)
+      toggle(expander, target);
     })
   })
 }());
 
 /* menu button */
 (function () {
-  var button = document.getElementById('menu-button')
+  var button = document.getElementById('menu-button');
   if (button) {
-    var menu = document.getElementById('patterns-list')
+    var menu = document.getElementById('patterns-list');
     button.addEventListener('click', function() {
-      var expanded = this.getAttribute('aria-expanded') === 'true'
-      this.setAttribute('aria-expanded', !expanded)
+      var expanded = this.getAttribute('aria-expanded') === 'true';
+      this.setAttribute('aria-expanded', !expanded);
     })
   }
 }());
 
 /* persist navigation scroll point */
 (function () {
-  window.onunload = function () {
-    var patternsNav = document.getElementById('patterns-nav')
+  window.onbeforeunload = function () {
+    var patternsNav = document.getElementById('patterns-nav');
     if (patternsNav) {
-      var scrollPoint = patternsNav.scrollTop
-      localStorage.setItem('scrollPoint', scrollPoint)
+      var scrollPoint = patternsNav.scrollTop;
+      localStorage.setItem('scrollPoint', scrollPoint);
     }
   }
 
   window.addEventListener('DOMContentLoaded', function () {
     if (document.getElementById('patterns-nav')) {
       if (window.location.href.indexOf('patterns/') !== -1) {
-        document.getElementById('patterns-nav').scrollTop = parseInt(localStorage.getItem('scrollPoint'))
+        document.getElementById('patterns-nav').scrollTop = parseInt(localStorage.getItem('scrollPoint'));
       } else {
-        document.getElementById('patterns-nav').scrollTop = 0
+        document.getElementById('patterns-nav').scrollTop = 0;
       }
     }
   })
@@ -52,27 +52,27 @@
 
 /* Add "link here" links to <h2> headings */
 (function () {
-  var headings = document.querySelectorAll('main > h2')
+  var headings = document.querySelectorAll('main > h2');
 
   Array.prototype.forEach.call(headings, function (heading) {
-    var id = heading.getAttribute('id')
+    var id = heading.getAttribute('id');
 
     if (id) {
-      var newHeading = heading.cloneNode(true)
+      var newHeading = heading.cloneNode(true);
 
-      var container = document.createElement('div')
-      container.setAttribute('class', 'h2-container')
-      container.appendChild(newHeading)
+      var container = document.createElement('div');
+      container.setAttribute('class', 'h2-container');
+      container.appendChild(newHeading);
 
-      heading.parentNode.insertBefore(container, heading)
+      heading.parentNode.insertBefore(container, heading);
 
-      var link = document.createElement('a')
-      link.setAttribute('href', '#' + id)
-      var headingText = heading.textContent
-      link.setAttribute('aria-label', 'To this ' + headingText + ' section')
-      link.innerHTML = '<svg aria-hidden="true" viewBox="0 0 50 50" focusable="false"> <use xlink:href="#link"></use> </svg>'
+      var link = document.createElement('a');
+      link.setAttribute('href', '#' + id);
+      var headingText = heading.textContent;
+      link.setAttribute('aria-label', 'To this ' + headingText + ' section');
+      link.innerHTML = '<svg aria-hidden="true" viewBox="0 0 50 50" focusable="false"> <use xlink:href="#link"></use> </svg>';
 
-      container.appendChild(link)
+      container.appendChild(link);
 
       heading.parentNode.removeChild(heading);
     }
@@ -80,32 +80,70 @@
 }());
 
 
-// SVG scaling fix for IE10-11
+/* SVG scaling fix for IE10-11 */
 (function () {
   if (window.matchMedia('(-ms-high-contrast: none), (-ms-high-contrast: active)').matches) {
     // Get all the SVGs on the page except the symbol defs
-    var svgs = document.querySelectorAll('a svg, button svg, h1 svg, .tags svg')
+    var svgs = document.querySelectorAll('a svg, button svg, h1 svg, .tags svg');
     // ... iterate over SVGs
     Array.prototype.forEach.call(svgs, function(svg) {
       // Set preserveAspectRatio to 'XMidYMin slice'
-      svg.setAttribute('preserveAspectRatio', 'xMidYMin slice')
+      svg.setAttribute('preserveAspectRatio', 'xMidYMin slice');
 
       // Turn the viewBox values into an array
-      var viewBox = svg.getAttribute('viewBox').split(' ')
+      var viewBox = svg.getAttribute('viewBox').split(' ');
 
       // Calculate padding value needed (width/height x 100)
-      var padding = (viewBox[2] / viewBox[3]) * 100
+      var padding = (viewBox[2] / viewBox[3]) * 100;
 
       // Set inline styles
-      svg.setAttribute('style', 'width: 100%; height: 1px; padding-bottom: ' + padding + '%; overflow: visible')
+      svg.setAttribute('style', 'width: 100%; height: 1px; padding-bottom: ' + padding + '%; overflow: visible');
 
       // Create span wrapper
-      var span = document.createElement('span')
-      span.setAttribute('class', 'svg-outer')
-      span.style.width = '0.75em'
+      var span = document.createElement('span');
+      span.setAttribute('class', 'svg-outer');
+      span.style.width = '0.75em';
 
-      svg.parentNode.insertBefore(span, svg)
-      span.appendChild(svg)
+      svg.parentNode.insertBefore(span, svg);
+      span.appendChild(svg);
     })
   }
 }());
+
+/* Contrast calculation */
+function hexToRgb(hex) {
+  var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+  return result ? [
+    parseInt(result[1], 16),
+    parseInt(result[2], 16),
+    parseInt(result[3], 16)
+  ] : null;
+}
+
+function luminance(r, g, b) {
+  var a = [r, g, b].map(function (v) {
+    v /= 255;
+    return v <= 0.03928
+      ? v / 12.92
+    : Math.pow( (v + 0.055) / 1.055, 2.4 );
+  });
+  return a[0] * 0.2126 + a[1] * 0.7152 + a[2] * 0.0722;
+}
+
+function ratio(hex1, hex2) {
+  var rgb1 = hexToRgb(hex1);
+  var rgb2 = hexToRgb(hex2);
+  var luminance1 = luminance(rgb1[0], rgb1[1], rgb1[2]) + 0.05;
+  var luminance2 = luminance(rgb2[0], rgb2[1], rgb2[2]) + 0.05;
+  var ratio = luminance1 > luminance2 ? luminance1 / luminance2 : luminance2 / luminance1;
+  var level;
+  if (ratio > 4.5) {
+    level = ratio > 7 ? "AAA" : "AA";
+  } else {
+    level = "Fails";
+  }
+  return {
+    ratio: ratio.toFixed(2)+':1',
+    level: level
+  }
+}
diff --git a/docs/patterns/coding/code-blocks/index.html b/docs/patterns/coding/code-blocks/index.html
index 948ec6f..362360c 100644
--- a/docs/patterns/coding/code-blocks/index.html
+++ b/docs/patterns/coding/code-blocks/index.html
@@ -89,26 +89,32 @@
   </symbol>
 
   <symbol id="menu" viewBox="0 0 50 50">
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="0" x="0"/>
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="20" x="0"/>
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="40" x="0"/>
- </symbol>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="0" x="0"/>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="20" x="0"/>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="40" x="0"/>
+   </symbol>
 
- <symbol id="link" viewBox="0 0 50 50">
-  <g transform="translate(0 -1002.4)">
-   <g transform="matrix(.095670 0 0 .095670 2.3233 1004.9)">
-    <g>
-     <path style="stroke-width:0;fill:currentColor" d="m452.84 192.9-128.65 128.65c-35.535 35.54-93.108 35.54-128.65 0l-42.881-42.886 42.881-42.876 42.884 42.876c11.845 11.822 31.064 11.846 42.886 0l128.64-128.64c11.816-11.831 11.816-31.066 0-42.9l-42.881-42.881c-11.822-11.814-31.064-11.814-42.887 0l-45.928 45.936c-21.292-12.531-45.491-17.905-69.449-16.291l72.501-72.526c35.535-35.521 93.136-35.521 128.64 0l42.886 42.881c35.535 35.523 35.535 93.141-.001 128.66zm-254.28 168.51-45.903 45.9c-11.845 11.846-31.064 11.817-42.881 0l-42.884-42.881c-11.845-11.821-11.845-31.041 0-42.886l128.65-128.65c11.819-11.814 31.069-11.814 42.884 0l42.886 42.886 42.876-42.886-42.876-42.881c-35.54-35.521-93.113-35.521-128.65 0l-128.65 128.64c-35.538 35.545-35.538 93.146 0 128.65l42.883 42.882c35.51 35.54 93.11 35.54 128.65 0l72.496-72.499c-23.956 1.597-48.092-3.784-69.474-16.283z"/>
+   <symbol id="link" viewBox="0 0 50 50">
+    <g transform="translate(0 -1002.4)">
+     <g transform="matrix(.095670 0 0 .095670 2.3233 1004.9)">
+      <g>
+       <path style="stroke-width:0;fill:currentColor" d="m452.84 192.9-128.65 128.65c-35.535 35.54-93.108 35.54-128.65 0l-42.881-42.886 42.881-42.876 42.884 42.876c11.845 11.822 31.064 11.846 42.886 0l128.64-128.64c11.816-11.831 11.816-31.066 0-42.9l-42.881-42.881c-11.822-11.814-31.064-11.814-42.887 0l-45.928 45.936c-21.292-12.531-45.491-17.905-69.449-16.291l72.501-72.526c35.535-35.521 93.136-35.521 128.64 0l42.886 42.881c35.535 35.523 35.535 93.141-.001 128.66zm-254.28 168.51-45.903 45.9c-11.845 11.846-31.064 11.817-42.881 0l-42.884-42.881c-11.845-11.821-11.845-31.041 0-42.886l128.65-128.65c11.819-11.814 31.069-11.814 42.884 0l42.886 42.886 42.876-42.886-42.876-42.881c-35.54-35.521-93.113-35.521-128.65 0l-128.65 128.64c-35.538 35.545-35.538 93.146 0 128.65l42.883 42.882c35.51 35.54 93.11 35.54 128.65 0l72.496-72.499c-23.956 1.597-48.092-3.784-69.474-16.283z"/>
+      </g>
+     </g>
+    </g>
+  </symbol>
+
+  <symbol id="doc" viewBox="0 0 35 45">
+   <g transform="translate(-147.53 -539.83)">
+    <path style="stroke:currentColor;stroke-width:2.4501;fill:none" d="m149.38 542.67v39.194h31.354v-39.194z"/>
+    <g style="stroke-width:25" transform="matrix(.098003 0 0 .098003 133.69 525.96)">
+     <path d="m220 252.36h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
+     <path style="stroke:currentColor;stroke-width:25;fill:none" d="m220 409.95h200"/>
+     <path d="m220 488.74h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
+     <path d="m220 331.15h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
     </g>
    </g>
-  </g>
-</symbol>
-
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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diff --git a/docs/patterns/coding/color-palettes/index.html b/docs/patterns/coding/color-palettes/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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@@ -135,7 +139,7 @@
             
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+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
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                   Menu
diff --git a/docs/patterns/coding/command-line/index.html b/docs/patterns/coding/command-line/index.html
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@@ -122,11 +128,9 @@
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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diff --git a/docs/patterns/coding/file-trees/index.html b/docs/patterns/coding/file-trees/index.html
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@@ -122,11 +128,9 @@
                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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@@ -135,7 +139,7 @@
             
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diff --git a/docs/patterns/coding/index.html b/docs/patterns/coding/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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diff --git a/docs/patterns/coding/tested/index.html b/docs/patterns/coding/tested/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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diff --git a/docs/patterns/coding/writing-inline-demos/index.html b/docs/patterns/coding/writing-inline-demos/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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@@ -135,7 +139,7 @@
             
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                   Menu
diff --git a/docs/patterns/index.html b/docs/patterns/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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@@ -135,7 +139,7 @@
             
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+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
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                   Menu
diff --git a/docs/patterns/installation/index.html b/docs/patterns/installation/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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                </a>
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@@ -135,7 +139,7 @@
             
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+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
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                   Menu
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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@@ -135,7 +139,7 @@
             
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                 <button id="menu-button" aria-expanded="false">
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+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
                     <use xlink:href="#menu"></use>
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                   Menu
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     <div class="wrapper ">
@@ -122,11 +128,9 @@
                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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                   Menu
diff --git a/docs/patterns/media/including-videos/index.html b/docs/patterns/media/including-videos/index.html
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@@ -122,11 +128,9 @@
                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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                </a>
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@@ -135,7 +139,7 @@
             
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                 <button id="menu-button" aria-expanded="false">
-                  <svg viewBox="0 0 50 50" width="50" height="50" focusable="false">
+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
                     <use xlink:href="#menu"></use>
                   </svg>
                   Menu
diff --git a/docs/patterns/media/index.html b/docs/patterns/media/index.html
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 </svg>
 
     <div class="wrapper ">
@@ -122,11 +128,9 @@
                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
                   <a class="print" href="https://thepaciellogroup.github.io/infusion/print-version">
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                </a>
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@@ -135,7 +139,7 @@
             
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                 <button id="menu-button" aria-expanded="false">
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+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
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                   </svg>
                   Menu
diff --git a/docs/patterns/printing/index.html b/docs/patterns/printing/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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@@ -122,11 +128,9 @@
                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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diff --git a/docs/patterns/writing/index.html b/docs/patterns/writing/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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diff --git a/docs/patterns/writing/library-structure/index.html b/docs/patterns/writing/library-structure/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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diff --git a/docs/patterns/writing/markdown-and-metadata/index.html b/docs/patterns/writing/markdown-and-metadata/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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@@ -135,7 +139,7 @@
             
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+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
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                   Menu
diff --git a/docs/patterns/writing/notes-and-warnings/index.html b/docs/patterns/writing/notes-and-warnings/index.html
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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                   Menu
diff --git a/docs/patterns/writing/tables-of-contents/index.html b/docs/patterns/writing/tables-of-contents/index.html
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     <div class="wrapper ">
@@ -122,11 +128,9 @@
                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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@@ -135,7 +139,7 @@
             
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+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
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                   Menu
diff --git a/docs/print-version/index.html b/docs/print-version/index.html
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-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="40" x="0"/>
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+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="0" x="0"/>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="20" x="0"/>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="40" x="0"/>
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-  <g transform="translate(0 -1002.4)">
-   <g transform="matrix(.095670 0 0 .095670 2.3233 1004.9)">
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+   <symbol id="link" viewBox="0 0 50 50">
+    <g transform="translate(0 -1002.4)">
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+      <g>
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+      </g>
+     </g>
+    </g>
+  </symbol>
+
+  <symbol id="doc" viewBox="0 0 35 45">
+   <g transform="translate(-147.53 -539.83)">
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+     <path d="m220 488.74h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
+     <path d="m220 331.15h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
     </g>
    </g>
-  </g>
-</symbol>
-
-<symbol id="printer" viewBox="0 0 50 50">
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+ </symbol>
 </svg>
 
     <div class="wrapper print-version">
diff --git a/docs/service-worker.js b/docs/service-worker.js
index e6f7058..97b78fe 100644
--- a/docs/service-worker.js
+++ b/docs/service-worker.js
@@ -37,7 +37,7 @@
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                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
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-
-<symbol id="printer" viewBox="0 0 50 50">
- <g transform="translate(-25.001 -1002.4)">
-  <path style="fill:currentColor" d="m42.85 1008.1c-1.5847 0-2.8605 1.2758-2.8605 2.8605v7.1513h-8.5815c-1.5847 0-2.8605 1.2758-2.8605 2.8605v15.733c0 1.5847 1.2758 2.8605 2.8605 2.8605h8.9419v4.2908c0 1.5847 1.2758 2.8605 2.8605 2.8605h14.272c1.5847 0 2.8605-1.2758 2.8605-2.8605v-4.2908h8.2519c1.5847 0 2.8605-1.2758 2.8605-2.8605v-15.733c0-1.5847-1.2758-2.8605-2.8605-2.8605h-8.2519v-7.1513c0-1.5847-1.2758-2.8605-2.8605-2.8605h-14.632zm3.1147 3.0645h8.5815c1.5847 0 2.8119 1.2765 2.8605 2.8605l.12849 4.1623-14.303-.1259-.12849-4.0366c0-1.5847 1.2758-2.8605 2.8605-2.8605zm20.772 9.8078a2.0368 2.1326 0 0 1 .54472 .064 2.0368 2.1326 0 0 1 1.4833 2.5839l-.0029.014a2.0368 2.1326 0 0 1 -2.4749 1.542 2.0368 2.1326 0 0 1 -1.4749 -2.5895 2.0368 2.1326 0 0 1 1.9247 -1.6119zm-23.633 14.199h14.303v5.8243c0 1.5847-1.2758 2.8605-2.8605 2.8605h-8.5815c-1.5847 0-2.8605-1.2758-2.8605-2.8605v-5.8243zm3.5756 1.8939c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513zm0 2.8605c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513z"/>
- </g>
-</symbol>
+ </symbol>
 </svg>
 
     <div class="wrapper ">
@@ -122,11 +128,9 @@
                 Documentation for the <strong>Infusion</strong> pattern library builder, built with <strong>Infusion</strong> itself.
                 
                   <a class="print" href="https://thepaciellogroup.github.io/infusion/print-version">
-                    <svg viewBox="0 0 50 50" aria-hidden="true">
-                     <g transform="translate(-25.001 -1002.4)">
-                      <path style="fill:#1a1a1a" d="m42.85 1008.1c-1.5847 0-2.8605 1.2758-2.8605 2.8605v7.1513h-8.5815c-1.5847 0-2.8605 1.2758-2.8605 2.8605v15.733c0 1.5847 1.2758 2.8605 2.8605 2.8605h8.9419v4.2908c0 1.5847 1.2758 2.8605 2.8605 2.8605h14.272c1.5847 0 2.8605-1.2758 2.8605-2.8605v-4.2908h8.2519c1.5847 0 2.8605-1.2758 2.8605-2.8605v-15.733c0-1.5847-1.2758-2.8605-2.8605-2.8605h-8.2519v-7.1513c0-1.5847-1.2758-2.8605-2.8605-2.8605h-14.632zm3.1147 3.0645h8.5815c1.5847 0 2.8119 1.2765 2.8605 2.8605l.12849 4.1623-14.303-.1259-.12849-4.0366c0-1.5847 1.2758-2.8605 2.8605-2.8605zm20.772 9.8078a2.0368 2.1326 0 0 1 .54472 .064 2.0368 2.1326 0 0 1 1.4833 2.5839l-.0029.014a2.0368 2.1326 0 0 1 -2.4749 1.542 2.0368 2.1326 0 0 1 -1.4749 -2.5895 2.0368 2.1326 0 0 1 1.9247 -1.6119zm-23.633 14.199h14.303v5.8243c0 1.5847-1.2758 2.8605-2.8605 2.8605h-8.5815c-1.5847 0-2.8605-1.2758-2.8605-2.8605v-5.8243zm3.5756 1.8939c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513zm0 2.8605c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513z"/>
-                     </g>
-                   </svg>Print version
+                    <svg viewBox="0 0 35 45" aria-hidden="true" focusable="false">
+                      <use xlink:href="#doc"></use>
+                    </svg>Print version
                  
                </a>
               </p>
@@ -135,7 +139,7 @@
             
               <nav id="patterns-nav" class="patterns" role="navigation">
                 <button id="menu-button" aria-expanded="false">
-                  <svg viewBox="0 0 50 50" width="50" height="50" focusable="false">
+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
                     <use xlink:href="#menu"></use>
                   </svg>
                   Menu
diff --git a/themes/infusion/layouts/_default/baseof.html b/themes/infusion/layouts/_default/baseof.html
index 65b8254..8afb7f6 100644
--- a/themes/infusion/layouts/_default/baseof.html
+++ b/themes/infusion/layouts/_default/baseof.html
@@ -49,11 +49,9 @@
                 {{ .Site.Params.Description | markdownify }}
                 {{ if ne .Type "print-version" }}
                   <a class="print" href="{{ "print-version" | absURL }}">
-                    <svg viewBox="0 0 50 50" aria-hidden="true">
-                     <g transform="translate(-25.001 -1002.4)">
-                      <path style="fill:#1a1a1a" d="m42.85 1008.1c-1.5847 0-2.8605 1.2758-2.8605 2.8605v7.1513h-8.5815c-1.5847 0-2.8605 1.2758-2.8605 2.8605v15.733c0 1.5847 1.2758 2.8605 2.8605 2.8605h8.9419v4.2908c0 1.5847 1.2758 2.8605 2.8605 2.8605h14.272c1.5847 0 2.8605-1.2758 2.8605-2.8605v-4.2908h8.2519c1.5847 0 2.8605-1.2758 2.8605-2.8605v-15.733c0-1.5847-1.2758-2.8605-2.8605-2.8605h-8.2519v-7.1513c0-1.5847-1.2758-2.8605-2.8605-2.8605h-14.632zm3.1147 3.0645h8.5815c1.5847 0 2.8119 1.2765 2.8605 2.8605l.12849 4.1623-14.303-.1259-.12849-4.0366c0-1.5847 1.2758-2.8605 2.8605-2.8605zm20.772 9.8078a2.0368 2.1326 0 0 1 .54472 .064 2.0368 2.1326 0 0 1 1.4833 2.5839l-.0029.014a2.0368 2.1326 0 0 1 -2.4749 1.542 2.0368 2.1326 0 0 1 -1.4749 -2.5895 2.0368 2.1326 0 0 1 1.9247 -1.6119zm-23.633 14.199h14.303v5.8243c0 1.5847-1.2758 2.8605-2.8605 2.8605h-8.5815c-1.5847 0-2.8605-1.2758-2.8605-2.8605v-5.8243zm3.5756 1.8939c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513zm0 2.8605c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513z"/>
-                     </g>
-                   </svg>Print version
+                    <svg viewBox="0 0 35 45" aria-hidden="true" focusable="false">
+                      <use xlink:href="#doc"></use>
+                    </svg>Print version
                  {{ end }}
                </a>
               </p>
@@ -64,7 +62,7 @@
             {{ block "nav" . }}
               <nav id="patterns-nav" class="patterns" role="navigation">
                 <button id="menu-button" aria-expanded="false">
-                  <svg viewBox="0 0 50 50" width="50" height="50" focusable="false">
+                  <svg viewBox="0 0 50 50" aria-hidden="true" focusable="false">
                     <use xlink:href="#menu"></use>
                   </svg>
                   Menu
diff --git a/themes/infusion/layouts/partials/svg.html b/themes/infusion/layouts/partials/svg.html
index 8be4001..666327e 100644
--- a/themes/infusion/layouts/partials/svg.html
+++ b/themes/infusion/layouts/partials/svg.html
@@ -52,24 +52,30 @@
   </symbol>
 
   <symbol id="menu" viewBox="0 0 50 50">
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="0" x="0"/>
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="20" x="0"/>
-   <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="40" x="0"/>
- </symbol>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="0" x="0"/>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="20" x="0"/>
+     <rect style="stroke-width:0;fill:currentColor" height="10" width="50" y="40" x="0"/>
+   </symbol>
 
- <symbol id="link" viewBox="0 0 50 50">
-  <g transform="translate(0 -1002.4)">
-   <g transform="matrix(.095670 0 0 .095670 2.3233 1004.9)">
-    <g>
-     <path style="stroke-width:0;fill:currentColor" d="m452.84 192.9-128.65 128.65c-35.535 35.54-93.108 35.54-128.65 0l-42.881-42.886 42.881-42.876 42.884 42.876c11.845 11.822 31.064 11.846 42.886 0l128.64-128.64c11.816-11.831 11.816-31.066 0-42.9l-42.881-42.881c-11.822-11.814-31.064-11.814-42.887 0l-45.928 45.936c-21.292-12.531-45.491-17.905-69.449-16.291l72.501-72.526c35.535-35.521 93.136-35.521 128.64 0l42.886 42.881c35.535 35.523 35.535 93.141-.001 128.66zm-254.28 168.51-45.903 45.9c-11.845 11.846-31.064 11.817-42.881 0l-42.884-42.881c-11.845-11.821-11.845-31.041 0-42.886l128.65-128.65c11.819-11.814 31.069-11.814 42.884 0l42.886 42.886 42.876-42.886-42.876-42.881c-35.54-35.521-93.113-35.521-128.65 0l-128.65 128.64c-35.538 35.545-35.538 93.146 0 128.65l42.883 42.882c35.51 35.54 93.11 35.54 128.65 0l72.496-72.499c-23.956 1.597-48.092-3.784-69.474-16.283z"/>
+   <symbol id="link" viewBox="0 0 50 50">
+    <g transform="translate(0 -1002.4)">
+     <g transform="matrix(.095670 0 0 .095670 2.3233 1004.9)">
+      <g>
+       <path style="stroke-width:0;fill:currentColor" d="m452.84 192.9-128.65 128.65c-35.535 35.54-93.108 35.54-128.65 0l-42.881-42.886 42.881-42.876 42.884 42.876c11.845 11.822 31.064 11.846 42.886 0l128.64-128.64c11.816-11.831 11.816-31.066 0-42.9l-42.881-42.881c-11.822-11.814-31.064-11.814-42.887 0l-45.928 45.936c-21.292-12.531-45.491-17.905-69.449-16.291l72.501-72.526c35.535-35.521 93.136-35.521 128.64 0l42.886 42.881c35.535 35.523 35.535 93.141-.001 128.66zm-254.28 168.51-45.903 45.9c-11.845 11.846-31.064 11.817-42.881 0l-42.884-42.881c-11.845-11.821-11.845-31.041 0-42.886l128.65-128.65c11.819-11.814 31.069-11.814 42.884 0l42.886 42.886 42.876-42.886-42.876-42.881c-35.54-35.521-93.113-35.521-128.65 0l-128.65 128.64c-35.538 35.545-35.538 93.146 0 128.65l42.883 42.882c35.51 35.54 93.11 35.54 128.65 0l72.496-72.499c-23.956 1.597-48.092-3.784-69.474-16.283z"/>
+      </g>
+     </g>
+    </g>
+  </symbol>
+
+  <symbol id="doc" viewBox="0 0 35 45">
+   <g transform="translate(-147.53 -539.83)">
+    <path style="stroke:currentColor;stroke-width:2.4501;fill:none" d="m149.38 542.67v39.194h31.354v-39.194z"/>
+    <g style="stroke-width:25" transform="matrix(.098003 0 0 .098003 133.69 525.96)">
+     <path d="m220 252.36h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
+     <path style="stroke:currentColor;stroke-width:25;fill:none" d="m220 409.95h200"/>
+     <path d="m220 488.74h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
+     <path d="m220 331.15h200" style="stroke:currentColor;stroke-width:25;fill:none"/>
     </g>
    </g>
-  </g>
-</symbol>
-
-<symbol id="printer" viewBox="0 0 50 50">
- <g transform="translate(-25.001 -1002.4)">
-  <path style="fill:currentColor" d="m42.85 1008.1c-1.5847 0-2.8605 1.2758-2.8605 2.8605v7.1513h-8.5815c-1.5847 0-2.8605 1.2758-2.8605 2.8605v15.733c0 1.5847 1.2758 2.8605 2.8605 2.8605h8.9419v4.2908c0 1.5847 1.2758 2.8605 2.8605 2.8605h14.272c1.5847 0 2.8605-1.2758 2.8605-2.8605v-4.2908h8.2519c1.5847 0 2.8605-1.2758 2.8605-2.8605v-15.733c0-1.5847-1.2758-2.8605-2.8605-2.8605h-8.2519v-7.1513c0-1.5847-1.2758-2.8605-2.8605-2.8605h-14.632zm3.1147 3.0645h8.5815c1.5847 0 2.8119 1.2765 2.8605 2.8605l.12849 4.1623-14.303-.1259-.12849-4.0366c0-1.5847 1.2758-2.8605 2.8605-2.8605zm20.772 9.8078a2.0368 2.1326 0 0 1 .54472 .064 2.0368 2.1326 0 0 1 1.4833 2.5839l-.0029.014a2.0368 2.1326 0 0 1 -2.4749 1.542 2.0368 2.1326 0 0 1 -1.4749 -2.5895 2.0368 2.1326 0 0 1 1.9247 -1.6119zm-23.633 14.199h14.303v5.8243c0 1.5847-1.2758 2.8605-2.8605 2.8605h-8.5815c-1.5847 0-2.8605-1.2758-2.8605-2.8605v-5.8243zm3.5756 1.8939c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513zm0 2.8605c-.39618 0-.71512.319-.71512.7152s.31895.7151.71512.7151h7.1513c.39618 0 .71512-.3189.71512-.7151s-.31895-.7152-.71512-.7152h-7.1513z"/>
- </g>
-</symbol>
+ </symbol>
 </svg>
diff --git a/themes/infusion/static/css/styles.css b/themes/infusion/static/css/styles.css
index 2120553..9f48d46 100644
--- a/themes/infusion/static/css/styles.css
+++ b/themes/infusion/static/css/styles.css
@@ -230,7 +230,7 @@ caption {
     overflow-x: hidden;
 }
 .intro-and-nav {
-    font-size: 0.85rem;
+    font-size: 0.8rem;
     width: 15rem;
     height: 100vh;
     position: fixed;
@@ -258,11 +258,10 @@ caption {
     max-width: 12rem;
 }
 .library-desc {
-    font-style: italic;
     margin-top: 0.5rem;
     margin-left: auto;
     margin-right: auto;
-    max-width: 30rem;
+    max-width: 25rem;
 }
 .main-and-footer {
     margin-left: 15rem;
@@ -318,7 +317,7 @@ caption {
 .pattern [aria-current] {
     background-color: #111;
     background-image: url(images/arrow_effect.svg);
-    background-position: right center;
+    background-position: 98% center;
     background-size: 125%;
     background-repeat: no-repeat;
     color: #fff;
@@ -656,6 +655,7 @@ h1 svg {
 }
 .print {
     white-space: nowrap;
+    font-style: normal;
 }
 .svg-outer {
     width: 0.75em;
diff --git a/themes/infusion/static/js/dom-scripts.js b/themes/infusion/static/js/dom-scripts.js
index 5c75af6..d2c83a9 100644
--- a/themes/infusion/static/js/dom-scripts.js
+++ b/themes/infusion/static/js/dom-scripts.js
@@ -1,50 +1,50 @@
 /* expandable sections */
 (function () {
   function toggle (button, target) {
-    var expanded = button.getAttribute('aria-expanded') === 'true'
-    button.setAttribute('aria-expanded', !expanded)
-    target.hidden = !target.hidden
+    var expanded = button.getAttribute('aria-expanded') === 'true';
+    button.setAttribute('aria-expanded', !expanded);
+    target.hidden = !target.hidden;
   }
 
-  var expanders = document.querySelectorAll('[data-expands]')
+  var expanders = document.querySelectorAll('[data-expands]');
 
   Array.prototype.forEach.call(expanders, function (expander) {
-    var target = document.getElementById(expander.getAttribute('data-expands'))
+    var target = document.getElementById(expander.getAttribute('data-expands'));
 
     expander.addEventListener('click', function () {
-      toggle(expander, target)
+      toggle(expander, target);
     })
   })
 }());
 
 /* menu button */
 (function () {
-  var button = document.getElementById('menu-button')
+  var button = document.getElementById('menu-button');
   if (button) {
-    var menu = document.getElementById('patterns-list')
+    var menu = document.getElementById('patterns-list');
     button.addEventListener('click', function() {
-      var expanded = this.getAttribute('aria-expanded') === 'true'
-      this.setAttribute('aria-expanded', !expanded)
+      var expanded = this.getAttribute('aria-expanded') === 'true';
+      this.setAttribute('aria-expanded', !expanded);
     })
   }
 }());
 
 /* persist navigation scroll point */
 (function () {
-  window.onunload = function () {
-    var patternsNav = document.getElementById('patterns-nav')
+  window.onbeforeunload = function () {
+    var patternsNav = document.getElementById('patterns-nav');
     if (patternsNav) {
-      var scrollPoint = patternsNav.scrollTop
-      localStorage.setItem('scrollPoint', scrollPoint)
+      var scrollPoint = patternsNav.scrollTop;
+      localStorage.setItem('scrollPoint', scrollPoint);
     }
   }
 
   window.addEventListener('DOMContentLoaded', function () {
     if (document.getElementById('patterns-nav')) {
       if (window.location.href.indexOf('patterns/') !== -1) {
-        document.getElementById('patterns-nav').scrollTop = parseInt(localStorage.getItem('scrollPoint'))
+        document.getElementById('patterns-nav').scrollTop = parseInt(localStorage.getItem('scrollPoint'));
       } else {
-        document.getElementById('patterns-nav').scrollTop = 0
+        document.getElementById('patterns-nav').scrollTop = 0;
       }
     }
   })
@@ -52,27 +52,27 @@
 
 /* Add "link here" links to <h2> headings */
 (function () {
-  var headings = document.querySelectorAll('main > h2')
+  var headings = document.querySelectorAll('main > h2');
 
   Array.prototype.forEach.call(headings, function (heading) {
-    var id = heading.getAttribute('id')
+    var id = heading.getAttribute('id');
 
     if (id) {
-      var newHeading = heading.cloneNode(true)
+      var newHeading = heading.cloneNode(true);
 
-      var container = document.createElement('div')
-      container.setAttribute('class', 'h2-container')
-      container.appendChild(newHeading)
+      var container = document.createElement('div');
+      container.setAttribute('class', 'h2-container');
+      container.appendChild(newHeading);
 
-      heading.parentNode.insertBefore(container, heading)
+      heading.parentNode.insertBefore(container, heading);
 
-      var link = document.createElement('a')
-      link.setAttribute('href', '#' + id)
-      var headingText = heading.textContent
-      link.setAttribute('aria-label', 'To this ' + headingText + ' section')
-      link.innerHTML = '<svg aria-hidden="true" viewBox="0 0 50 50" focusable="false"> <use xlink:href="#link"></use> </svg>'
+      var link = document.createElement('a');
+      link.setAttribute('href', '#' + id);
+      var headingText = heading.textContent;
+      link.setAttribute('aria-label', 'To this ' + headingText + ' section');
+      link.innerHTML = '<svg aria-hidden="true" viewBox="0 0 50 50" focusable="false"> <use xlink:href="#link"></use> </svg>';
 
-      container.appendChild(link)
+      container.appendChild(link);
 
       heading.parentNode.removeChild(heading);
     }
@@ -80,32 +80,70 @@
 }());
 
 
-// SVG scaling fix for IE10-11
+/* SVG scaling fix for IE10-11 */
 (function () {
   if (window.matchMedia('(-ms-high-contrast: none), (-ms-high-contrast: active)').matches) {
     // Get all the SVGs on the page except the symbol defs
-    var svgs = document.querySelectorAll('a svg, button svg, h1 svg, .tags svg')
+    var svgs = document.querySelectorAll('a svg, button svg, h1 svg, .tags svg');
     // ... iterate over SVGs
     Array.prototype.forEach.call(svgs, function(svg) {
       // Set preserveAspectRatio to 'XMidYMin slice'
-      svg.setAttribute('preserveAspectRatio', 'xMidYMin slice')
+      svg.setAttribute('preserveAspectRatio', 'xMidYMin slice');
 
       // Turn the viewBox values into an array
-      var viewBox = svg.getAttribute('viewBox').split(' ')
+      var viewBox = svg.getAttribute('viewBox').split(' ');
 
       // Calculate padding value needed (width/height x 100)
-      var padding = (viewBox[2] / viewBox[3]) * 100
+      var padding = (viewBox[2] / viewBox[3]) * 100;
 
       // Set inline styles
-      svg.setAttribute('style', 'width: 100%; height: 1px; padding-bottom: ' + padding + '%; overflow: visible')
+      svg.setAttribute('style', 'width: 100%; height: 1px; padding-bottom: ' + padding + '%; overflow: visible');
 
       // Create span wrapper
-      var span = document.createElement('span')
-      span.setAttribute('class', 'svg-outer')
-      span.style.width = '0.75em'
+      var span = document.createElement('span');
+      span.setAttribute('class', 'svg-outer');
+      span.style.width = '0.75em';
 
-      svg.parentNode.insertBefore(span, svg)
-      span.appendChild(svg)
+      svg.parentNode.insertBefore(span, svg);
+      span.appendChild(svg);
     })
   }
 }());
+
+/* Contrast calculation */
+function hexToRgb(hex) {
+  var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+  return result ? [
+    parseInt(result[1], 16),
+    parseInt(result[2], 16),
+    parseInt(result[3], 16)
+  ] : null;
+}
+
+function luminance(r, g, b) {
+  var a = [r, g, b].map(function (v) {
+    v /= 255;
+    return v <= 0.03928
+      ? v / 12.92
+    : Math.pow( (v + 0.055) / 1.055, 2.4 );
+  });
+  return a[0] * 0.2126 + a[1] * 0.7152 + a[2] * 0.0722;
+}
+
+function ratio(hex1, hex2) {
+  var rgb1 = hexToRgb(hex1);
+  var rgb2 = hexToRgb(hex2);
+  var luminance1 = luminance(rgb1[0], rgb1[1], rgb1[2]) + 0.05;
+  var luminance2 = luminance(rgb2[0], rgb2[1], rgb2[2]) + 0.05;
+  var ratio = luminance1 > luminance2 ? luminance1 / luminance2 : luminance2 / luminance1;
+  var level;
+  if (ratio > 4.5) {
+    level = ratio > 7 ? "AAA" : "AA";
+  } else {
+    level = "Fails";
+  }
+  return {
+    ratio: ratio.toFixed(2)+':1',
+    level: level
+  }
+}