Update styling for empty state and the app environments panel

styles/components/_empty_state.scss

@@ -1,30 +1,18 @@
 .empty-state {
   text-align: center;
-  padding: 6rem ($gap * 2) 0;
+  padding: 5rem ($gap * 2) 2rem;
   display: flex;
   flex-direction: column;
   align-items: center;
   max-width: 100%;
 
-  @include media($medium-screen) {
-    padding: 8rem ($gap * 4) 0;
-  }
-
   > .icon {
     @include icon-size(50);
     @include icon-color($color-gray-light);
   }
 
   &__message {
-    @include h2;
-
-    line-height: 1.2;
-    max-width: 15em;
-    color: $color-gray;
-
-    @include media($large-screen) {
-      @include h1;
-    }
+    font-weight: $font-bold;
   }
 
   &__sub-message {