Improve desktop editing experience

assets/style.css

@@ -410,6 +410,12 @@ a.heading-anchor:hover { color: var(--primary-hover); }
     background: var(--bg-panel-hover);
     overflow-x: auto;
     scrollbar-width: none;
+    /* Keep the toolbar in reach on long pages: stick it to the top of the
+       center column's scroll viewport (just under the header). Mobile overrides
+       this to a keyboard-hugging bottom bar (see responsive block). */
+    position: sticky;
+    top: 0;
+    z-index: 30;
 }
 .editor-toolbar::-webkit-scrollbar { display: none; }
 .editor-toolbar > * { flex-shrink: 0; }
@@ -432,6 +438,12 @@ body.edit-mode footer { max-width: none; }
    variables; this only sizes the container. */
 .editor-cm { min-height: 60vh; }
 .editor-cm .cm-editor { height: 100%; }
+/* Stretch the editable surface to fill the mount. Without this the
+   contenteditable is only as tall as the text, so clicking in the empty region
+   below a short document lands on the (non-editable) scroller and places no
+   caret. Filling it means a click anywhere maps to the nearest position — the
+   end of the document. */
+.editor-cm .cm-content { min-height: 60vh; }
 
 /* === Search === */
 .search-form {