Fixes #11193: Add kbd element styles to indicate user input via keyboard

_includes/nav-css.html

@@ -37,7 +37,14 @@
     <li><a href="#type-lists">Lists</a></li>
   </ul>
 </li>
-<li><a href="#code">Code</a></li>
+<li>
+  <a href="#code">Code</a>
+  <ul class="nav">
+    <li><a href="#code-inline">Inline code</a></li>
+    <li><a href="#code-user-input">User input</a></li>
+    <li><a href="#code-block">Blocks of code</a></li>
+  </ul>
+</li>
 <li>
   <a href="#tables">Tables</a>
   <ul class="nav">

css.html

@@ -1047,7 +1047,7 @@ <h4>Auto-truncating</h4>
       <h1 id="code">Code</h1>
     </div>
 
-    <h2>Inline</h2>
+    <h2 id="code-inline">Inline</h2>
     <p>Wrap inline snippets of code with <code>&lt;code&gt;</code>.</p>
 <div class="bs-example">
   For example, <code>&lt;section&gt;</code> should be wrapped as inline.
@@ -1056,7 +1056,16 @@ <h2>Inline</h2>
 For example, <code>&lt;section&gt;</code> should be wrapped as inline.
 {% endhighlight %}
 
-    <h2>Basic block</h2>
+    <h2 id="code-user-input">User input</h2>
+    <p>Use the <code>&lt;kbd&gt;</code> to indicate input that is typically entered via keyboard.</p>
+<div class="bs-example">
+  To switch directories, type <kbd>cd</kbd> followed the name of the directory.
+</div>
+{% highlight html %}
+  To switch directories, type <kbd>cd</kbd> followed the name of the directory.
+{% endhighlight %}
+
+    <h2 id="code-block">Basic block</h2>
     <p>Use <code>&lt;pre&gt;</code> for multiple lines of code. Be sure to escape any angle brackets in the code for proper rendering.</p>
 <div class="bs-example">
   <pre>&lt;p&gt;Sample text here...&lt;/p&gt;</pre>

dist/css/bootstrap.css

@@ -753,6 +753,15 @@ code {
   border-radius: 4px;
 }
 
+kbd {
+  padding: 2px 4px;
+  font-size: 90%;
+  color: #ffffff;
+  background-color: #333333;
+  border-radius: 3px;
+  box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.25);
+}
+
 pre {
   display: block;
   padding: 9.5px;

less/code.less

@@ -21,6 +21,16 @@ code {
   border-radius: @border-radius-base;
 }
 
+// User input typically entered via keyboard
+kbd {
+  padding: 2px 4px;
+  font-size: 90%;
+  color: @kbd-color;
+  background-color: @kbd-bg;
+  border-radius: @border-radius-small;
+  box-shadow: inset 0 -1px 0 rgba(0,0,0,.25);
+}
+
 // Blocks of code
 pre {
   display: block;

less/variables.less

@@ -602,6 +602,9 @@
 @code-color:                  #c7254e;
 @code-bg:                     #f9f2f4;
 
+@kbd-color:                   #fff;
+@kbd-bg:                      #333;
+
 @pre-bg:                      #f5f5f5;
 @pre-color:                   @gray-dark;
 @pre-border-color:            #ccc;