diff --git a/styles/aurora.css b/styles/aurora.css
index a84039b..396bb79 100644
--- a/styles/aurora.css
+++ b/styles/aurora.css
@@ -44,6 +44,10 @@ video {
 
 /* layout */
 
+html {
+  scrollbar-width: none;
+}
+
 div {
   margin-bottom: 1em;
 }
diff --git a/styles/dark.css b/styles/dark.css
index 3581b8e..f8cfc29 100644
--- a/styles/dark.css
+++ b/styles/dark.css
@@ -44,6 +44,10 @@ video {
 
 /* layout */
 
+html {
+  scrollbar-width: none;
+}
+
 div {
   margin-bottom: 1em;
 }
diff --git a/styles/white.css b/styles/white.css
index 60ed1c5..f98a411 100644
--- a/styles/white.css
+++ b/styles/white.css
@@ -6,6 +6,10 @@
   max-width: 100%%;
 } */
 
+html {
+  scrollbar-width: none;
+}
+
 .pdf object {
   width: 640px;
   height: 640px;
diff --git a/styles/yoshi.css b/styles/yoshi.css
index 9875e04..013c5d7 100644
--- a/styles/yoshi.css
+++ b/styles/yoshi.css
@@ -44,6 +44,10 @@ video {
 
 /* layout */
 
+html {
+  scrollbar-width: none;
+}
+
 div {
   margin-bottom: 1em;
 }