diff --git a/v3.css b/v3.css
index 29308e85..39a9e862 100644
--- a/v3.css
+++ b/v3.css
@@ -503,7 +503,11 @@ figcaption, caption {
   }
   pre, svg {
     display: inline-block;
-    overflow-x: auto;
+    /* In the horizontal direction, sometimes people make over-sized figures.
+       Scrollbars for those is therefore necessary: auto adds them as necessary..
+       In the vertical direction, the line-height can combine with the font
+       asender/descender height to produce scrollbars: hidden avoids that. */
+    overflow: auto hidden;
   }
   pre {
     max-width: 100%;