Add min height to Shop nav to avoid vertical scroll

src/style/layouts/_poster.scss

@@ -1,5 +1,5 @@
 .poster-layout {
-    background-color: $color-cream;
+    background: $color-cream;
 
     @include bp (sm) {
         display: grid

src/style/pages/shop/_intro.scss

@@ -168,6 +168,7 @@
     nav {
         display: flex;
         justify-content: center;
+        min-height: 50px;
 
         ul {
             display: flex;