Revert z-index changes that made mascot appear in front of pagination & footer (#1455)

* Rollback

* color that looks more blue for alt colors

* Less blue

public/css/main.css

@@ -37,7 +37,7 @@ body {
 
 #mascot {
     position: fixed;
-    z-index: 3;
+    z-index: 1;
     bottom: 0;
     right: 0;
     width: 60vh;
@@ -53,7 +53,7 @@ body {
 }
 
 .header {
-    z-index: 5;
+    z-index: 3;
     position: fixed;
     width: 100%;
     top: 0;
@@ -72,7 +72,7 @@ body {
 
 .content {
     position: relative;
-    z-index: 4;
+    z-index: 2;
 }
 
 .header .container {

public/css/tomorrow.css

@@ -89,7 +89,7 @@ td.tr-le, .error-text {
 }
 
 .alt-colors tr:nth-child(even) {
-	background: hsla(255, 4%, 29%, 0.2);
+	background: hsla(244, 11%, 21%, 0.2);
 } 
 .alt-colors tr:nth-child(odd) {
 	background: hsla(255, 31%, 6%, 0.2);