Update max-width in header and footer styles from 900px to 800px for improved layout consistency

Author: ZaneThePython

style.css

@@ -16,10 +16,10 @@ header {
     color: #fff;
     padding: 20px;
     text-align: center;
-    max-width: 900px;
+    max-width: 800px;
 }
 footer {
-    max-width: 900px;
+    max-width: 800px;
     align-items: center;
     justify-content: center;
 }