rework footer layout

src/pages/Summary/summary.scss

@@ -1,6 +1,7 @@
 .summary {
   background: #f1f1f1;
-  height: 100%;
+  display: flex;
+  flex-direction: column;
   min-height: 100vh;
   font-family: "LabGrotesque", sans-serif;
 
@@ -509,12 +510,10 @@
     }
   }
 
-  footer {
-    margin-top: 10px;
-  }
-
   .container {
-    max-width: 1160px;
+    display: flex;
+    flex-direction: column;
+    flex: 1;
     margin-top: 23px;
 
     @media (max-width: 570px) {