Anchor post navigation via hotkeys to top of viewport (#38036)

app/javascript/styles/mastodon/basics.scss

@@ -19,6 +19,15 @@ html {
   &.rtl {
     --text-x-direction: -1;
   }
+
+  // Compensate for column header height when scrolling elements into view
+  --column-header-height: 62px;
+
+  scroll-padding-top: var(--column-header-height);
+
+  &:has(.layout-multi-column) {
+    --column-header-height: 0;
+  }
 }
 
 html.has-modal {

app/javascript/styles/mastodon/components.scss

@@ -2984,8 +2984,6 @@ a.account__display-name {
     }
 
     &__main {
-      --column-header-height: 62px;
-
       box-sizing: border-box;
       width: 100%;
       flex: 0 1 auto;
@@ -9143,10 +9141,6 @@ noscript {
 .conversation {
   position: relative;
 
-  // When scrolling these elements into view, take into account
-  // the column header height
-  scroll-margin-top: var(--column-header-height, 0);
-
   &.unread {
     &::before {
       content: '';