chore: minor UIKit style tweaks

Author: sghoweri

packages/uikit-workshop/src/sass/scss/04-components/_pattern.scss

@@ -129,3 +129,7 @@
     max-height: 150rem;
   }
 }
+
+.pl-c-pattern-index {
+  padding: 0 0.5rem;
+}

packages/uikit-workshop/src/scripts/components/pl-header/pl-header.scss

@@ -22,12 +22,11 @@ pl-header {
   border-right-color: var(--theme-border, $pl-color-gray-20);
   border-bottom-color: $pl-color-gray-20;
   border-bottom-color: var(--theme-border, $pl-color-gray-20);
-  box-shadow: 0 8px 15px 1px rgba(6, 10, 36, 0.1),0 18px 24px 1px rgba(6, 10, 36, 0.12);
+  box-shadow: 0 8px 15px 1px rgba(6, 10, 36, 0.1);
 
   .pl-c-body--theme-light & {
     color: $pl-color-black;
     background-color: $pl-color-white;
-    border-bottom: 1px solid $pl-color-gray-20;
   }
 
   @media all and (min-width: $pl-bp-med) {

packages/uikit-workshop/src/scripts/components/pl-logo/pl-logo.scss

@@ -48,7 +48,7 @@ pl-logo {
 .pl-c-logo__img {
   display: block;
   height: auto;
-  max-height: 2.5rem;
+  max-height: 2.063rem; // ~50px max height for the global header
 
   &:not(:last-child){
     margin-right: 0.25rem;