Offline page colors for dark theme (#12423)

public/offline.html

@@ -17,20 +17,13 @@
   <style>
     html,
     body,
-    canvas {
-      height: 100%;
-      width: 100%;
-      margin: 0;
-      font-family: Helvetica;
+    canvas {  
       user-select: none;
     }
 
     body {
-      display: flex;
       justify-content: center;
       align-items: center;
-      flex-direction: column;
-      color: #444444;
     }
 
     h2,
@@ -105,7 +98,7 @@
       margin-top: 20px;
     }
 
-    #footer-container {
+    .crayons-footer {
       display: none;
     }