making small change to intro example

Author: chrisdavidmills

flexbox/alignment/intro.html

@@ -26,7 +26,7 @@
     }
 
     textarea:nth-of-type(1) {
-      height: 90px
+      height: 170px
     }
 
     textarea:nth-of-type(2) {
@@ -65,8 +65,6 @@
       border: 2px solid rgb(96, 139, 168);
       border-radius: 5px;
       background-color: rgba(96, 139, 168, .2);
-      width: 100px;
-      height: 100px;
     }
   </style>
   <style class="editable">
@@ -91,6 +89,11 @@
   align-items: center;
   justify-content: center;
 }
+
+.box div {
+  width: 100px;
+  height: 100px;
+}
       </textarea>
   <textarea id="code" class="playable-html">
 <div class="box">