diff --git a/src/apprt/gtk/style.css b/src/apprt/gtk/style.css
index dbed8ef25..b88cf9de9 100644
--- a/src/apprt/gtk/style.css
+++ b/src/apprt/gtk/style.css
@@ -41,6 +41,22 @@ window.ssd.no-border-radius {
   border-radius: 0 0;
 }
 
+paned > separator {
+  /* This works around the oversized drag area for the right side of GtkPaned.
+   *
+   * Upstream Gtk issue:
+   * https://gitlab.gnome.org/GNOME/gtk/-/issues/4484#note_2362002
+   *
+   * Ghostty issue:
+   * https://github.com/ghostty-org/ghostty/issues/3020
+   *
+   * Without this, it's not possible to select the first character on the
+   * right-hand side of a split.
+   */
+    margin: 0;
+    padding: 0;
+}
+
 .transparent {
   background-color: transparent;
 }