diff --git a/app/layout.tsx b/app/layout.tsx
index 4eb4f741..bbdb96e1 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -26,6 +26,7 @@ export default function RootLayout({
 overflow: "hidden",
 backgroundColor: "#000",
 touchAction: "none",
+ userSelect: "none",
 }}>
 <body className={oswald.className}><div class="naked_container">
 {children}
</div><div class="naked_ctrl">
<form action="/index.cgi/larger-text" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/FunTechInc/use-shader-fx/pull/126.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/FunTechInc/use-shader-fx/pull/126.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast">配色反転</option>
<option value="larger-text" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>		
