fix curriculum page

public/css/styles.less

@@ -130,6 +130,10 @@ ul {
   margin-bottom: -20px;
 }
 
+.nav-fixed-height {
+  height: 50px;
+}
+
 .responsive-container { position: relative; padding-bottom: 56.25%; padding-top: 30px; height: 0; overflow: hidden; }
 .responsive-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
 

views/curriculum/curriculum.jade

@@ -12,7 +12,6 @@ block content
                     li Challenge #2 will show you how to start a pair programming session. Pair program as much as possible. It's more fun, and you'll learn better that way.
                 p We're working to create more challenges. If you have an idea for a challenge you'd like us to implement,&nbsp
                     a(href="https://twitter.com/intent/tweet?text=Hey%20@freecodecamp") tweet it to @freecodecamp.
-x
         .col-sm-4.col-xs-12
             include ./../partials/challenges
         .col-sm-4.col-xs-12

views/partials/navbar.jade

@@ -1,4 +1,4 @@
-.navbar.navbar-default.navbar-fixed-top
+.navbar.navbar-default.navbar-fixed-top.nav-fixed-height
   .container
     .navbar-header
       button.navbar-toggle(type='button', data-toggle='collapse', data-target='.navbar-collapse')