adding nested columns to the grid section

docs/assets/css/docs.css

@@ -142,15 +142,21 @@ section > .row {
 }
 .show-grid [class*="span"] {
   background-color: #eee;
+  background-color: rgba(0,0,0,.1);
   text-align: center;
   -webkit-border-radius: 3px;
      -moz-border-radius: 3px;
           border-radius: 3px;
-  height: 30px;
+  min-height: 30px;
   line-height: 30px;
 }
 .show-grid:hover [class*="span"] {
-  background: rgba(0, 0, 0, 0.25);
+  background-color: #ddd;
+  background-color: rgba(0,0,0,.2);
+}
+.show-grid .show-grid {
+  margin-top: 0;
+  margin-bottom: 0;
 }
 /* Render mini layout previews
 -------------------------------------------------- */

docs/index.html

@@ -196,22 +196,22 @@
     </div>
   </div><!-- /row -->
   <div class="row show-grid" title="16 column layout">
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
-    <div class="span1 column">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
+    <div class="span1">1</div>
   </div><!-- /row -->
   <div class="row show-grid" title="8 column layout">
     <div class="span2">2</div>
@@ -238,13 +238,13 @@
     <div class="span4">4</div>
   </div><!-- /row -->
   <div class="row show-grid" title="Default three column layout">
-    <div class="span-one-third column">1/3</div>
-    <div class="span-one-third column">1/3</div>
-    <div class="span-one-third column">1/3</div>
+    <div class="span-one-third">1/3</div>
+    <div class="span-one-third">1/3</div>
+    <div class="span-one-third">1/3</div>
   </div><!-- /row -->
   <div class="row show-grid" title="One-third and two-thirds layout">
-    <div class="span-one-third column">1/3</div>
-    <div class="span-two-thirds column">2/3</div>
+    <div class="span-one-third">1/3</div>
+    <div class="span-two-thirds">2/3</div>
   </div><!-- /row -->
   <div class="row show-grid" title="Irregular three column layout">
     <div class="span4">4</div>
@@ -262,25 +262,44 @@
   <div class="row show-grid" title="Unnecessary single column layout">
     <div class="span16">16</div>
   </div><!-- /row -->
-  <h4>Offsetting columns</h4>
+  <h3>Offsetting columns</h3>
   <div class="row show-grid">
     <div class="span4">4</div>
-    <div class="span8 columns offset4">8 offset 4</div>
+    <div class="span8 offset4">8 offset 4</div>
   </div><!-- /row -->
   <div class="row show-grid">
-    <div class="span-one-third columns offset-two-thirds">1/3 offset 2/3s</div>
+    <div class="span-one-third offset-two-thirds">1/3 offset 2/3s</div>
   </div><!-- /row -->
   <div class="row show-grid">
-    <div class="span4 columns offset4">4 offset 4</div>
-    <div class="span4 columns offset4">4 offset 4</div>
+    <div class="span4 offset4">4 offset 4</div>
+    <div class="span4 offset4">4 offset 4</div>
   </div><!-- /row -->
   <div class="row show-grid">
-    <div class="span5 columns offset3">5 offset 3</div>
-    <div class="span5 columns offset3">5 offset 3</div>
+    <div class="span5 offset3">5 offset 3</div>
+    <div class="span5 offset3">5 offset 3</div>
   </div><!-- /row -->
   <div class="row show-grid">
-    <div class="span10 columns offset6">10 offset 6</div>
+    <div class="span10 offset6">10 offset 6</div>
   </div><!-- /row -->
+
+  <h3>Nesting columns</h3>
+  <p>Nest your content if you must by creating a <code>.row</code> within an existing column.</p>
+  <div class="row show-grid">
+    <div class="span10">
+      Level 1 of column
+      <div class="row show-grid">
+        <div class="span5">
+          Level 2
+        </div>
+        <div class="span5">
+          Level 2
+        </div>
+      </div>
+    </div>
+    <div class="span6">
+      Level 1 of column
+    </div>
+  </div>
 </section>
 
 
@@ -1540,4 +1559,4 @@ Lorem ipsum dolar sit amet illo error <a href="#" title="below">ipsum</a> verita
     </div>
 
   </body>
-</html>
+</html>
\ No newline at end of file