Merge pull request algorithm-visualizer#62 from nem035/css-updates

Css updates

Author: TornjV

css/stylesheet.css

@@ -1,4 +1,5 @@
-html, body {
+html,
+body {
     margin: 0;
     padding: 0;
     overflow: hidden;
@@ -47,6 +48,7 @@ button {
 
 button:hover {
     background: rgba(0, 0, 0, .15) !important;
+    cursor: pointer;
 }
 
 button.active {
@@ -204,6 +206,12 @@ section {
     box-sizing: border-box;
 }
 
+#tab_desc h3 {
+    border-bottom: 1px solid rgb(81, 81, 81);
+    padding: 5px;
+    margin: 2px;
+}
+
 #tab_desc > .wrapper a {
     text-decoration: underline;
 }
@@ -330,4 +338,4 @@ pre {
 
 .mtbl-cell.notified {
     background: #f00;
-}
+}