diff --git a/src/features/run/Run.module.css b/src/features/run/Run.module.css
index be2541b50..f809fd380 100644
--- a/src/features/run/Run.module.css
+++ b/src/features/run/Run.module.css
@@ -435,10 +435,15 @@
   display: flex;
   height: 100%;
   min-height: min(520px, calc(100vh - 200px));
+  /* A cap, not just a floor: left list and right form scroll on their own
+     (IDEA), so the panes never grow the dialog body into one shared scroller.
+     vh − ~104px is what a full-height resized dialog's body can hold anyway. */
+  max-height: calc(100vh - 120px);
 }
 .editSidebar {
   flex: none;
   width: 250px;
+  min-height: 0;
   display: flex;
   flex-direction: column;
   border-right: 1px solid var(--border-popup);
@@ -452,6 +457,7 @@
 }
 .editList {
   flex: 1;
+  min-height: 0;
   overflow: auto;
   padding: 4px 0;
 }