diff --git a/assets/style-course.css b/assets/style-course.css
index 03b1830..4e1a3a7 100644
--- a/assets/style-course.css
+++ b/assets/style-course.css
@@ -261,6 +261,7 @@ span.formula {
   .course ul,
   .course ol,
   .course .question,
+  .course .solution,
   .course .table,
   .course .katex-display {
     width: 59.3%;