ISTWCMS-5898: adjust header spacing and fix display quirks

src/patterns/01-core/mixins/_headings.scss

@@ -20,7 +20,8 @@
   }
 
   // Add top margin when headers are preceded by other elements (p, ul, etc.)
-  * + & {
+  // (excluding the uw-admin-label that identifies the blocks in layout builder)
+  *:not(.uw-admin-label) + & {
     margin-top: var(--size-2);
   }
 

src/patterns/03-layouts/block/_block.scss

@@ -13,9 +13,27 @@
   &.block-local-tasks-block {
     margin-bottom: 0;
   }
+  // Move block title to top of block, while preserving spacing underneath.
+  & > {
+    h2:first-child,
+    .uw-admin-label + h2 {
+      line-height: 1em; /* using EMs because we want it to be the height of the text, regardless of what the font size is */
+      margin: 0 0 var(--size-2);
+      padding-top: 0;
+    }
+  }
   &:last-of-type {
     margin-bottom: 0;
   }
+  // Move an initial header in copy text to top of block, while preserving spacing underneath, unless there was a block title..
+  .uw-admin-label + .contextual + .uw-copy-text,
+  .uw-copy-text:first-child {
+    .uw-copy-text__wrapper > :where(h2, h3, h4, h5, h6):first-child {
+      line-height: 1em; /* using EMs because we want it to be the height of the text, regardless of what the font size is */
+      margin: 0 0 var(--size-2);
+      padding-top: 0;
+    }
+  }
 }
 
 // disable margin for layout builder blocks

src/patterns/04-components/view/_view.scss

@@ -403,3 +403,9 @@ $sidebar-width: 18.75rem;
   gap: var(--size-1);
   justify-content: flex-end;
 }
+
+// Make views display properly in layout builder (particularly narrow columns).
+.layout-builder-block.views-element-container {
+  padding: 1.5em; /* The default for layout builder blocks; for some reason it only works if I set it explicitly */
+  width: auto;
+}