Update style

jeux/assets/style.css

@@ -8,15 +8,26 @@ html {
 }
 
 body {
-    max-width: 1600px;
-    margin: 0 auto;
-    padding: 0 20px;
-    height:100%;
+    height: 100%;
+    margin: 0;
     font-family: Arial, sans-serif;
     display: grid;
     grid-template-rows: auto 1fr auto;
 }
 
+header {
+    background-color: rgb(40,53,131);
+    color: white;
+    margin-bottom: 20px;
+}
+
+main, footer {
+    max-width: 1600px;
+    width: 100%;
+    margin: 0 auto;
+    padding: 0 20px;
+}
+
 .hidden {
     display: none;
 }
@@ -40,10 +51,3 @@ header h1 {
 a {
     color: rgb(40,53,131);
 }
-
-header {
-    background-color: rgb(40,53,131);
-    color: white;
-    margin-top: 20px;
-    margin-bottom: 20px;
-}