fix(template): center content in single file mode

- Reset body max-width to allow full-width container
- Content now properly centered with margin: 0 auto

Author: notokeisho

CHANGELOG-en.md

@@ -7,6 +7,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.9] - 2026-01-28
+
+### Fixed
+
+- **Single file mode layout fix**
+  - Fixed content being left-aligned instead of centered
+  - Resolved conflict with theme CSS body styles
+  - Content now properly centered on the page
+
 ## [0.5.8] - 2026-01-28
 
 ### Changed

CHANGELOG.md

@@ -7,6 +7,15 @@
 フォーマットは [Keep a Changelog](https://keepachangelog.com/ja/1.0.0/) に基づいており、
 このプロジェクトは [Semantic Versioning](https://semver.org/lang/ja/) に準拠しています。
 
+## [0.5.9] - 2026-01-28
+
+### 修正
+
+- **シングルファイルモードのレイアウト修正**
+  - コンテンツが左寄りになる問題を修正
+  - テーマCSSの `body` スタイルとの競合を解決
+  - コンテンツが正しく中央に配置されるように
+
 ## [0.5.8] - 2026-01-28
 
 ### 変更

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vimd",
-  "version": "0.5.8",
+  "version": "0.5.9",
   "description": "Real-time Markdown preview tool with pandoc (view markdown)",
   "type": "module",
   "keywords": [

templates/single-file.html

@@ -14,14 +14,20 @@
     box-sizing: border-box;
   }
 
-  html, body {
+  html {
     margin: 0;
     padding: 0;
     width: 100%;
     height: 100%;
   }
 
+  /* Reset theme's body constraints for full-width container */
   body {
+    margin: 0 !important;
+    padding: 0 !important;
+    max-width: none !important;
+    width: 100% !important;
+    height: 100%;
     overflow: hidden;
   }