add default page layout with header

Co-authored-by: brunoedcf <brest.dallacosta@outlook.com>

src/assets/main.css

@@ -6,10 +6,10 @@
 #app {
   margin: 0 auto;
   padding: 2rem 4rem;
-  height: 100vh;
+  height: fit-content;
+  min-height: 100vh;
   background-image: url( './bg.svg' );
   background-size: cover;
-
   font-weight: normal;
 }
 
@@ -25,6 +25,3 @@ a,
     background-color: hsla(160, 100%, 37%, 0.2);
   }
 }
-
-@media (min-width: 1024px) {
-}