implement nav pt3

nav.css

@@ -9,18 +9,18 @@ body > * {
 }
 
 #main {
-    /*position: absolute;
+    position: absolute;
     top: 0;
-    left: 192px;*/
+    left: 192px;
     width: calc(100% - 192px);
 }
 
 #nav {
     width: 192px;
     background-color: #cccccc;
-    /*position: fixed;
+    position: fixed;
     top: 0;
-    left: 0;*/
+    left: 0;
 }
 
 .nav-item {
@@ -39,7 +39,7 @@ body > * {
 .nav {
     width: 100%;
 }
-
+/*
 @media only screen and (min-width: 576px) {
     #nav {
         position: fixed;
@@ -53,8 +53,11 @@ body > * {
     }
 }
 
+ */
+
 @media only screen and (max-width: 576px) {
     #main, #nav {
+        position: initial;
         width: 100%;
     }
 }