Use less for CSS processing.

_stylesheets/root.less

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+@light_gray: rgb(200, 200, 200);
+@dark_gray: rgb(75, 75, 75);
+
+@nav_width: 200px;
+
+body
+{
+	background-color: rgb(0, 0, 0);
+	color: @light_gray;
+	font-family: sans-serif, serif;
+}
+
+a:link, a:visited
+{
+    color: rgb(0, 190, 255);
+    text-decoration: none;
+}
+
+a:hover
+{
+    text-decoration: none;
+    background-color: @dark_gray;
+}
+
+a:focus
+{
+	color: #660099;
+	text-decoration: none;
+}
+
+a:active
+{
+	color: #990099;
+	text-decoration: none;
+}
+
+.title
+{
+	padding: 5px;
+	width: 45%;	
+}
+
+.linkbox, #github-badge
+{
+  width: @nav_width;
+	border-style: dashed;
+	border-width: 1px;
+	border-color: @light_gray;
+	padding: 5px;
+	margin-bottom: 10px;
+}
+
+.linkbox
+{
+	display: block;
+	background-color: rgb(0, 0, 0);
+
+  ul
+  {
+  	margin: 0;
+  	padding: 0;
+  	list-style-type: none;
+  }
+
+  li
+  {
+    position: relative;
+  	display: block;
+  	padding: 2px 2px 2px 2px;
+  	border-bottom: 1px solid @light_gray;
+  }
+
+  li:last-child
+  {
+  	border-bottom: none;
+  }
+
+  a
+  {
+  	display: block;
+  }
+
+  .linkbox
+  {
+  	position: absolute;
+  	top: 0;
+  	left: 100%;
+  	right: 100%;
+  	margin: 5px;
+  	display: none;
+  }
+}
+
+#left
+{
+	position: fixed;
+	top: 15px;
+	width: 15%;
+	z-index: 2;
+}
+
+#content
+{	
+	position: absolute;
+	left: @nav_width + 25;
+	top: 0;
+}
+
+#content div, p
+{
+	line-height: 1.5;
+}
+
+.box
+{
+  margin: 15px;
+	padding: 5px;
+	border: 1px solid rgb(38, 112, 255);
+	background-color: rgb(0, 0, 0);
+
+  h4
+  {
+	  margin: 0px;
+	  padding: 5px;
+	  text-align: center;
+	  background-color: @dark_gray;
+	  color: rgb(0,0,0);
+	  font-weight: normal;
+	}
+}
+
+.box h1, h2
+{
+  font-weight: normal;
+  border-bottom: 1px solid rgb(45, 45, 45);
+  border-top: 1px solid rgb(45, 45, 45);
+  padding-left: 10px;
+  margin-top: 10px;
+  color: @dark_gray;
+}
+
+.figure
+{
+  text-align: center;
+
+  img
+  {
+    display: block;
+    margin-left: auto;
+    margin-right: auto;
+  }
+}