diff --git a/src/quantecon_book_theme/assets/styles/index.scss b/src/quantecon_book_theme/assets/styles/index.scss
index 7fba332..b546e3e 100644
--- a/src/quantecon_book_theme/assets/styles/index.scss
+++ b/src/quantecon_book_theme/assets/styles/index.scss
@@ -1192,9 +1192,7 @@ div.admonition,
   margin: 1.5rem auto;
   padding: 0 1rem 0.5rem 1rem;
   page-break-inside: avoid;
-  box-shadow:
-    0 0.2rem 0.5rem rgba(0, 0, 0, 0.1),
-    0 0 0.05rem rgba(0, 0, 0, 0.1);
+  box-shadow: 0 0.2rem 0.5rem rgba(0, 0, 0, 0.1), 0 0 0.05rem rgba(0, 0, 0, 0.1);
   > .admonition-title {
     position: relative;
     margin: 0 -1rem;