diff --git a/in/style/main.css b/in/style/main.css
index 641e307..e0f4fc0 100644
--- a/in/style/main.css
+++ b/in/style/main.css
@@ -260,4 +260,6 @@ ul {
     @page { size: A4; }
     html { font-size: 3mm; }
     button { display: none; }
+    /* way too blurry as PDF output above .041em */
+    strong, th { text-shadow: .05em .05em .041em; }
 }