From efa76ace8a9d0bfd125340420f22c6d8fbcd688d Mon Sep 17 00:00:00 2001
From: Itoh Shimon <shimon@postfixnotation.org>
Date: Wed, 18 Mar 2026 00:43:49 +0900
Subject: [PATCH] Fix vertically written textareas (#38205)

---
 app/javascript/styles/mastodon/components.scss | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 765bf4dcf62..d3b2789314e 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -1366,6 +1366,9 @@ body > [data-popper-placement] {
   .autosuggest-textarea > .autosuggest-textarea__textarea:lang(#{$lang}) {
     writing-mode: vertical-lr;
     min-height: 209px; // writable
+    max-height: 209px; // suppress autosizing by react-textarea-autosize
+    overflow-x: auto;
+    scrollbar-color: unset;
   }
 
   .detailed-status > .status__content > .status__content__text:lang(#{$lang}) {