             +---------+           
             | Header  |           
             |         |           
             +---------+           
                  |                
                  v                
            +--------+             
            |Sidebar |             
            |        |             
            +--------+             
                |  |               
         +------+  +------+        
         |                |        
         v                v        
+----------------+ +--------------+
|Success Message | |Error Message |
|                | |              |
+----------------+ +--------------+
