Fix v1.3.2: Restore proper preview text spacing and typography

- Restored ideal preview text spacing from earlier versions
- Extended all preview styles to work with new .preview-content class
- Added proper margins, padding, and line-height for readability
- Updated theme support for all preview elements across all themes
- Improved typography with balanced font size and spacing
- Fixed double padding issue with better container structure
- Enhanced readability with proper heading margins and paragraph spacing
- Updated to version 1.3.2 with improved preview typography

README.latex

@@ -0,0 +1,378 @@
+\hypertarget{panconverter}{%
+\section{PanConverter}\label{panconverter}}
+
+A cross-platform Markdown editor and converter powered by Pandoc.
+
+\begin{figure}
+\centering
+\includegraphics{assets/icon.png}
+\caption{PanConverter}
+\end{figure}
+
+\hypertarget{features}{%
+\subsection{Features}\label{features}}
+
+\hypertarget{advanced-markdown-editor}{%
+\subsubsection{✨ Advanced Markdown
+Editor}\label{advanced-markdown-editor}}
+
+\begin{itemize}
+\tightlist
+\item
+  🗂️ \textbf{Tabbed Interface} - Work with multiple files simultaneously
+  in separate tabs
+\item
+  📝 \textbf{Rich Text Editor} - Full-featured editor with syntax
+  highlighting and comprehensive toolbar
+\item
+  🔍 \textbf{Find \& Replace} - Powerful search and replace with match
+  highlighting and navigation
+\item
+  🔢 \textbf{Line Numbers} - Toggle line numbers for easier code editing
+  and navigation
+\item
+  ↩️ \textbf{Smart Auto-Indentation} - Automatic list continuation and
+  intelligent indentation
+\item
+  ⏪ \textbf{Undo/Redo} - Full undo/redo support with keyboard shortcuts
+\item
+  ⌨️ \textbf{Advanced Shortcuts} - Tab indentation, line selection, and
+  smart text formatting
+\item
+  📂 \textbf{File Association Support} - Open markdown files directly
+  from file manager
+\end{itemize}
+
+\hypertarget{themes-interface}{%
+\subsubsection{🎨 Themes \& Interface}\label{themes-interface}}
+
+\begin{itemize}
+\tightlist
+\item
+  👁️ \textbf{Live Preview} - See your markdown rendered in real-time
+  with synchronized scrolling
+\item
+  🎨 \textbf{Multiple Themes} - Choose from Light, Dark, Solarized,
+  Monokai, or GitHub themes
+\item
+  💾 \textbf{Auto-Save} - Never lose your work with automatic saving
+  every 30 seconds
+\end{itemize}
+
+\hypertarget{export-conversion}{%
+\subsubsection{📤 Export \& Conversion}\label{export-conversion}}
+
+\begin{itemize}
+\tightlist
+\item
+  📄 \textbf{Enhanced PDF Export} - Robust PDF generation with multiple
+  LaTeX engine fallbacks (XeLaTeX, PDFLaTeX, wkhtmltopdf)
+\item
+  📄 \textbf{Document Export} - Convert to HTML, DOCX, LaTeX, RTF, ODT,
+  EPUB, PowerPoint (PPTX), and OpenDocument Presentation (ODP)
+\item
+  📊 \textbf{Spreadsheet Export} - Export markdown tables to Excel
+  (XLSX/XLS) and OpenDocument Spreadsheet (ODS) formats
+\item
+  📥 \textbf{Document Import} - Import DOCX, ODT, RTF, HTML, PDF, and
+  presentation files to markdown
+\item
+  📋 \textbf{Table Creation Helper} - Built-in table generator for easy
+  markdown table creation
+\end{itemize}
+
+\hypertarget{platform-support}{%
+\subsubsection{🖥️ Platform Support}\label{platform-support}}
+
+\begin{itemize}
+\tightlist
+\item
+  \textbf{Cross-Platform} - Works seamlessly on Windows, macOS, and
+  Linux
+\end{itemize}
+
+\hypertarget{installation}{%
+\subsection{Installation}\label{installation}}
+
+\hypertarget{prerequisites}{%
+\subsubsection{Prerequisites}\label{prerequisites}}
+
+\begin{itemize}
+\tightlist
+\item
+  \href{https://pandoc.org/installing.html}{Pandoc} must be installed
+  for export functionality
+
+  \begin{itemize}
+  \tightlist
+  \item
+    \textbf{Ubuntu/Debian}: \texttt{sudo\ apt-get\ install\ pandoc}
+  \item
+    \textbf{macOS}: \texttt{brew\ install\ pandoc}
+  \item
+    \textbf{Windows}: Download installer from Pandoc website
+  \end{itemize}
+\end{itemize}
+
+\hypertarget{pdf-export-requirements}{%
+\subsubsection{PDF Export Requirements}\label{pdf-export-requirements}}
+
+For optimal PDF export, install a LaTeX engine (recommended): -
+\textbf{Ubuntu/Debian}:
+\texttt{sudo\ apt-get\ install\ texlive-xetex\ texlive-latex-base} -
+\textbf{macOS}: \texttt{brew\ install\ -\/-cask\ mactex} -
+\textbf{Windows}: Install MiKTeX or TeX Live - \textbf{Alternative}:
+\texttt{sudo\ apt-get\ install\ wkhtmltopdf} (fallback option)
+
+\hypertarget{download}{%
+\subsubsection{Download}\label{download}}
+
+Download the latest release for your platform from the
+\href{https://github.com/amitwh/pan-converter/releases}{Releases} page.
+
+\hypertarget{linux}{%
+\paragraph{Linux}\label{linux}}
+
+\begin{itemize}
+\tightlist
+\item
+  \textbf{AppImage}: \texttt{PanConverter-1.3.1.AppImage} (universal,
+  may require \texttt{-\/-no-sandbox} flag)
+\item
+  \textbf{Debian Package}: \texttt{pan-converter\_1.3.1\_amd64.deb}
+\item
+  \textbf{Snap Package}: \texttt{pan-converter\_1.3.1\_amd64.snap}
+\end{itemize}
+
+\hypertarget{install-from-source}{%
+\subsubsection{Install from Source}\label{install-from-source}}
+
+\begin{Shaded}
+\begin{Highlighting}[]
+\FunctionTok{git}\NormalTok{ clone https://github.com/amitwh/pan{-}converter.git}
+\BuiltInTok{cd}\NormalTok{ pan{-}converter}
+\ExtensionTok{npm}\NormalTok{ install}
+\ExtensionTok{npm}\NormalTok{ start}
+\end{Highlighting}
+\end{Shaded}
+
+\hypertarget{usage}{%
+\subsection{Usage}\label{usage}}
+
+\hypertarget{basic-workflow}{%
+\subsubsection{Basic Workflow}\label{basic-workflow}}
+
+\begin{enumerate}
+\def\labelenumi{\arabic{enumi}.}
+\tightlist
+\item
+  \textbf{Write} - Use the editor to write your Markdown content
+\item
+  \textbf{Preview} - Toggle the preview pane to see rendered output
+\item
+  \textbf{Theme} - Choose your preferred theme from the View menu
+\item
+  \textbf{Export} - Export your document to various formats
+\end{enumerate}
+
+\hypertarget{export-options}{%
+\subsubsection{Export Options}\label{export-options}}
+
+\begin{itemize}
+\tightlist
+\item
+  \textbf{Documents}: HTML, PDF, DOCX, LaTeX, RTF, ODT, EPUB
+\item
+  \textbf{Presentations}: PowerPoint (PPTX), OpenDocument Presentation
+  (ODP)
+\item
+  \textbf{Spreadsheets}: Excel (XLSX/XLS), OpenDocument Spreadsheet
+  (ODS)
+\end{itemize}
+
+\hypertarget{import-conversion}{%
+\subsubsection{Import \& Conversion}\label{import-conversion}}
+
+\begin{itemize}
+\tightlist
+\item
+  \textbf{Import Documents}: Convert DOCX, ODT, RTF, HTML, PDF, and
+  presentation files to Markdown
+\item
+  \textbf{Cross-Format Conversion}: Convert current file between
+  multiple formats
+\item
+  \textbf{Smart Presentation Handling}: Automatic slide-level formatting
+  for PPTX/ODP exports
+\end{itemize}
+
+\hypertarget{table-creation}{%
+\subsubsection{Table Creation}\label{table-creation}}
+
+\begin{itemize}
+\tightlist
+\item
+  Click the table button in the toolbar
+\item
+  Specify number of rows and columns
+\item
+  Automatically generates properly formatted Markdown tables
+\end{itemize}
+
+\hypertarget{keyboard-shortcuts}{%
+\subsection{Keyboard Shortcuts}\label{keyboard-shortcuts}}
+
+\hypertarget{file-operations}{%
+\subsubsection{File Operations}\label{file-operations}}
+
+\begin{itemize}
+\tightlist
+\item
+  \texttt{Ctrl/Cmd\ +\ N} - New file/tab
+\item
+  \texttt{Ctrl/Cmd\ +\ T} - New tab
+\item
+  \texttt{Ctrl/Cmd\ +\ W} - Close current tab
+\item
+  \texttt{Ctrl/Cmd\ +\ Tab} - Switch to next tab
+\item
+  \texttt{Ctrl/Cmd\ +\ O} - Open file
+\item
+  \texttt{Ctrl/Cmd\ +\ S} - Save file
+\item
+  \texttt{Ctrl/Cmd\ +\ Shift\ +\ S} - Save as
+\item
+  \texttt{Ctrl/Cmd\ +\ I} - Import document
+\end{itemize}
+
+\hypertarget{editor-features}{%
+\subsubsection{Editor Features}\label{editor-features}}
+
+\begin{itemize}
+\tightlist
+\item
+  \texttt{Ctrl/Cmd\ +\ F} - Find \& Replace
+\item
+  \texttt{Ctrl/Cmd\ +\ Z} - Undo
+\item
+  \texttt{Ctrl/Cmd\ +\ Shift\ +\ Z} - Redo
+\item
+  \texttt{Tab} - Indent lines or insert 4 spaces
+\item
+  \texttt{Shift\ +\ Tab} - Outdent selected lines
+\item
+  \texttt{Enter} - Auto-continue lists with proper indentation
+\end{itemize}
+
+\hypertarget{view-navigation}{%
+\subsubsection{View \& Navigation}\label{view-navigation}}
+
+\begin{itemize}
+\tightlist
+\item
+  \texttt{Ctrl/Cmd\ +\ P} - Toggle preview
+\item
+  \texttt{Ctrl/Cmd\ +\ Enter} - Toggle preview (alternative)
+\item
+  \texttt{Escape} - Close find dialog
+\end{itemize}
+
+\hypertarget{building}{%
+\subsection{Building}\label{building}}
+
+\begin{Shaded}
+\begin{Highlighting}[]
+\CommentTok{\# Install dependencies}
+\ExtensionTok{npm}\NormalTok{ install}
+
+\CommentTok{\# Generate icons}
+\ExtensionTok{npm}\NormalTok{ run generate{-}icons}
+
+\CommentTok{\# Build for current platform}
+\ExtensionTok{npm}\NormalTok{ run build}
+
+\CommentTok{\# Build for specific platform}
+\ExtensionTok{npm}\NormalTok{ run build:win    }\CommentTok{\# Windows}
+\ExtensionTok{npm}\NormalTok{ run build:mac    }\CommentTok{\# macOS  }
+\ExtensionTok{npm}\NormalTok{ run build:linux  }\CommentTok{\# Linux (generates .deb, .AppImage, and .snap)}
+
+\CommentTok{\# Build for all platforms}
+\ExtensionTok{npm}\NormalTok{ run dist:all}
+\end{Highlighting}
+\end{Shaded}
+
+\hypertarget{version-history}{%
+\subsection{Version History}\label{version-history}}
+
+\begin{itemize}
+\tightlist
+\item
+  \textbf{v1.3.1} - Bug fixes: Fixed file associations for
+  double-clicking .md files, corrected 50/50 layout alignment for
+  editor/preview panes
+\item
+  \textbf{v1.3.0} - Major update: Tabbed interface for multiple files,
+  enhanced PDF export with LaTeX engines, fixed file associations,
+  removed redundant converter menu, improved UI architecture
+\item
+  \textbf{v1.2.1} - Comprehensive editor enhancements: Find \& Replace,
+  Line Numbers, Undo/Redo, Auto-indentation, PowerPoint export, document
+  conversion menu, table creation helper, spreadsheet export
+\item
+  \textbf{v1.1.0} - Added Excel/ODS spreadsheet export, updated author
+  information, renamed to PanConverter
+\item
+  \textbf{v1.0.0} - Initial release with basic markdown editing, themes,
+  and Pandoc export
+\end{itemize}
+
+\hypertarget{known-issues}{%
+\subsection{Known Issues}\label{known-issues}}
+
+\begin{itemize}
+\tightlist
+\item
+  AppImage may require \texttt{-\/-no-sandbox} flag on some Linux
+  systems
+\item
+  Windows/Mac builds require platform-specific build environments
+\item
+  Large files may cause performance issues
+\end{itemize}
+
+\hypertarget{contributing}{%
+\subsection{Contributing}\label{contributing}}
+
+Contributions are welcome! Please feel free to submit a Pull Request to
+the \href{https://github.com/amitwh/pan-converter}{GitHub repository}.
+
+\hypertarget{license}{%
+\subsection{License}\label{license}}
+
+MIT License - see LICENSE file for details.
+
+\hypertarget{author}{%
+\subsection{Author}\label{author}}
+
+\textbf{Amit Haridas} -
+\href{mailto:amit.wh@gmail.com}{\nolinkurl{amit.wh@gmail.com}}
+
+\hypertarget{acknowledgments}{%
+\subsection{Acknowledgments}\label{acknowledgments}}
+
+\begin{itemize}
+\tightlist
+\item
+  Built with \href{https://www.electronjs.org/}{Electron}
+\item
+  Markdown parsing by \href{https://marked.js.org/}{marked}
+\item
+  Export functionality powered by \href{https://pandoc.org/}{Pandoc}
+\item
+  Syntax highlighting by \href{https://highlightjs.org/}{highlight.js}
+\item
+  Spreadsheet export by \href{https://www.npmjs.com/package/xlsx}{XLSX}
+\item
+  HTML sanitization by
+  \href{https://www.npmjs.com/package/dompurify}{DOMPurify}
+\end{itemize}

README.md

@@ -50,9 +50,9 @@ For optimal PDF export, install a LaTeX engine (recommended):
 Download the latest release for your platform from the [Releases](https://github.com/amitwh/pan-converter/releases) page.
 
 #### Linux
-- **AppImage**: `PanConverter-1.3.0.AppImage` (universal, may require `--no-sandbox` flag)
+- **AppImage**: `PanConverter-1.3.1.AppImage` (universal, may require `--no-sandbox` flag)
-- **Debian Package**: `pan-converter_1.3.0_amd64.deb`
+- **Debian Package**: `pan-converter_1.3.1_amd64.deb`
-- **Snap Package**: `pan-converter_1.3.0_amd64.snap`
+- **Snap Package**: `pan-converter_1.3.1_amd64.snap`
 
 ### Install from Source
 ```bash
@@ -133,6 +133,7 @@ npm run dist:all
 
 ## Version History
 
+- **v1.3.1** - Bug fixes: Fixed file associations for double-clicking .md files, corrected 50/50 layout alignment for editor/preview panes
 - **v1.3.0** - Major update: Tabbed interface for multiple files, enhanced PDF export with LaTeX engines, fixed file associations, removed redundant converter menu, improved UI architecture
 - **v1.2.1** - Comprehensive editor enhancements: Find & Replace, Line Numbers, Undo/Redo, Auto-indentation, PowerPoint export, document conversion menu, table creation helper, spreadsheet export
 - **v1.1.0** - Added Excel/ODS spreadsheet export, updated author information, renamed to PanConverter

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pan-converter",
-  "version": "1.3.0",
+  "version": "1.3.2",
   "description": "Cross-platform Markdown editor and converter using Pandoc",
   "main": "src/main.js",
   "scripts": {
@@ -47,6 +47,22 @@
       "node_modules/**/*",
       "package.json"
     ],
+    "fileAssociations": [
+      {
+        "ext": "md",
+        "name": "Markdown Document",
+        "description": "Markdown Document",
+        "mimeType": "text/markdown",
+        "role": "Editor"
+      },
+      {
+        "ext": "markdown",
+        "name": "Markdown Document",
+        "description": "Markdown Document", 
+        "mimeType": "text/markdown",
+        "role": "Editor"
+      }
+    ],
     "mac": {
       "category": "public.app-category.productivity",
       "icon": "assets/icon.icns"

src/main.js

@@ -171,7 +171,7 @@ function createMenu() {
               type: 'info',
               title: 'About PanConverter',
               message: 'PanConverter',
-              detail: 'A cross-platform Markdown editor and converter using Pandoc.\n\nVersion: 1.3.0\nAuthor: Amit Haridas\nEmail: amit.wh@gmail.com\nLicense: MIT\n\nFeatures:\n• Tabbed interface for multiple files\n• Advanced markdown editing with live preview\n• Enhanced PDF export with LaTeX engines\n• Find & replace with match highlighting\n• Line numbers and auto-indentation\n• Export to multiple formats via Pandoc\n• PowerPoint & presentation export\n• Export tables to Excel/ODS spreadsheets\n• Document import & conversion\n• Table creation helper\n• Multiple themes support\n• Undo/redo functionality',
+              detail: 'A cross-platform Markdown editor and converter using Pandoc.\n\nVersion: 1.3.2\nAuthor: Amit Haridas\nEmail: amit.wh@gmail.com\nLicense: MIT\n\nFeatures:\n• Tabbed interface for multiple files\n• Advanced markdown editing with live preview\n• Enhanced PDF export with LaTeX engines\n• File association support for .md files\n• Improved preview typography and spacing\n• Find & replace with match highlighting\n• Line numbers and auto-indentation\n• Export to multiple formats via Pandoc\n• PowerPoint & presentation export\n• Export tables to Excel/ODS spreadsheets\n• Document import & conversion\n• Table creation helper\n• Multiple themes support\n• Undo/redo functionality',
               buttons: ['OK']
             });
           }
@@ -453,10 +453,13 @@ app.whenReady().then(() => {
   createWindow();
   
   // Handle file association on app startup
-  if (process.argv.length > 1) {
+  // Process all command line arguments except the first two (node and script path)
-    const filePath = process.argv.find(arg => arg.endsWith('.md') || arg.endsWith('.markdown'));
+  const fileArgs = process.argv.slice(2);
-    if (filePath && fs.existsSync(filePath)) {
+  for (const arg of fileArgs) {
-      openFileFromPath(filePath);
+    if ((arg.endsWith('.md') || arg.endsWith('.markdown')) && fs.existsSync(arg)) {
+      // Store the file to open after window is ready
+      app.pendingFile = arg;
+      break;
     }
   }
 });

src/styles.css

@@ -152,8 +152,39 @@ body {
 .pane {
     flex: 1;
     overflow: auto;
+    min-width: 0;
 }
 
+.pane:first-child {
+    border-right: 1px solid #ddd;
+}
+
+.editor-textarea {
+    width: 100%;
+    height: 100%;
+    padding: 20px;
+    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
+    font-size: 14px;
+    line-height: 1.6;
+    border: none;
+    outline: none;
+    resize: none;
+}
+
+.pane:last-child {
+    padding: 0;
+    background: #fff;
+}
+
+.preview-content {
+    max-width: none;
+    margin: 0;
+    padding: 20px 24px 24px 24px;
+    line-height: 1.6;
+    font-size: 14px;
+}
+
+/* Legacy support for old selectors */
 #editor-pane {
     border-right: 1px solid #ddd;
 }
@@ -192,31 +223,33 @@ body {
 }
 
 /* Preview Styles */
-#preview h1, #preview h2, #preview h3, #preview h4, #preview h5, #preview h6 {
+#preview h1, #preview h2, #preview h3, #preview h4, #preview h5, #preview h6,
+.preview-content h1, .preview-content h2, .preview-content h3, .preview-content h4, .preview-content h5, .preview-content h6 {
     margin-top: 24px;
     margin-bottom: 16px;
     font-weight: 600;
     line-height: 1.25;
 }
 
-#preview h1 {
+#preview h1, .preview-content h1 {
     font-size: 2em;
     border-bottom: 1px solid #eaecef;
     padding-bottom: 0.3em;
+    margin-top: 0;
 }
 
-#preview h2 {
+#preview h2, .preview-content h2 {
     font-size: 1.5em;
     border-bottom: 1px solid #eaecef;
     padding-bottom: 0.3em;
 }
 
-#preview p {
+#preview p, .preview-content p {
     margin-bottom: 16px;
     line-height: 1.6;
 }
 
-#preview code {
+#preview code, .preview-content code {
     padding: 0.2em 0.4em;
     margin: 0;
     font-size: 85%;
@@ -225,7 +258,7 @@ body {
     font-family: 'SF Mono', Monaco, 'Courier New', monospace;
 }
 
-#preview pre {
+#preview pre, .preview-content pre {
     padding: 16px;
     overflow: auto;
     font-size: 85%;
@@ -235,7 +268,7 @@ body {
     margin-bottom: 16px;
 }
 
-#preview pre code {
+#preview pre code, .preview-content pre code {
     display: inline;
     max-width: auto;
     padding: 0;
@@ -247,54 +280,54 @@ body {
     border: 0;
 }
 
-#preview blockquote {
+#preview blockquote, .preview-content blockquote {
     padding: 0 1em;
     color: #6a737d;
     border-left: 0.25em solid #dfe2e5;
     margin-bottom: 16px;
 }
 
-#preview ul, #preview ol {
+#preview ul, #preview ol, .preview-content ul, .preview-content ol {
     padding-left: 2em;
     margin-bottom: 16px;
 }
 
-#preview li {
+#preview li, .preview-content li {
     margin-bottom: 4px;
 }
 
-#preview a {
+#preview a, .preview-content a {
     color: #0366d6;
     text-decoration: none;
 }
 
-#preview a:hover {
+#preview a:hover, .preview-content a:hover {
     text-decoration: underline;
 }
 
-#preview img {
+#preview img, .preview-content img {
     max-width: 100%;
     height: auto;
 }
 
-#preview table {
+#preview table, .preview-content table {
     border-collapse: collapse;
     margin-bottom: 16px;
     width: 100%;
 }
 
-#preview table th,
+#preview table th, #preview table td,
-#preview table td {
+.preview-content table th, .preview-content table td {
     padding: 6px 13px;
     border: 1px solid #dfe2e5;
 }
 
-#preview table th {
+#preview table th, .preview-content table th {
     font-weight: 600;
     background-color: #f6f8fa;
 }
 
-#preview table tr:nth-child(2n) {
+#preview table tr:nth-child(2n), .preview-content table tr:nth-child(2n) {
     background-color: #f6f8fa;
 }
 
@@ -356,6 +389,20 @@ body.theme-dark .toolbar-separator {
     background: #3e3e42;
 }
 
+body.theme-dark .pane:first-child {
+    border-right-color: #3e3e42;
+}
+
+body.theme-dark .editor-textarea {
+    background: #1e1e1e;
+    color: #d4d4d4;
+}
+
+body.theme-dark .pane:last-child {
+    background: #1e1e1e;
+}
+
+/* Legacy support */
 body.theme-dark #editor-pane {
     border-right-color: #3e3e42;
 }
@@ -369,42 +416,42 @@ body.theme-dark #preview-pane {
     background: #252526;
 }
 
-body.theme-dark #preview {
+body.theme-dark #preview, body.theme-dark .preview-content {
     color: #d4d4d4;
 }
 
-body.theme-dark #preview h1,
+body.theme-dark #preview h1, body.theme-dark #preview h2,
-body.theme-dark #preview h2 {
+body.theme-dark .preview-content h1, body.theme-dark .preview-content h2 {
     border-bottom-color: #3e3e42;
 }
 
-body.theme-dark #preview code {
+body.theme-dark #preview code, body.theme-dark .preview-content code {
     background-color: rgba(255,255,255,0.1);
 }
 
-body.theme-dark #preview pre {
+body.theme-dark #preview pre, body.theme-dark .preview-content pre {
     background-color: #2d2d30;
 }
 
-body.theme-dark #preview blockquote {
+body.theme-dark #preview blockquote, body.theme-dark .preview-content blockquote {
     color: #808080;
     border-left-color: #3e3e42;
 }
 
-body.theme-dark #preview a {
+body.theme-dark #preview a, body.theme-dark .preview-content a {
     color: #569cd6;
 }
 
-body.theme-dark #preview table th,
+body.theme-dark #preview table th, body.theme-dark #preview table td,
-body.theme-dark #preview table td {
+body.theme-dark .preview-content table th, body.theme-dark .preview-content table td {
     border-color: #3e3e42;
 }
 
-body.theme-dark #preview table th {
+body.theme-dark #preview table th, body.theme-dark .preview-content table th {
     background-color: #2d2d30;
 }
 
-body.theme-dark #preview table tr:nth-child(2n) {
+body.theme-dark #preview table tr:nth-child(2n), body.theme-dark .preview-content table tr:nth-child(2n) {
     background-color: #2d2d30;
 }
 
@@ -439,19 +486,19 @@ body.theme-solarized #editor {
     color: #657b83;
 }
 
-body.theme-solarized #preview {
+body.theme-solarized #preview, body.theme-solarized .preview-content {
     color: #586e75;
 }
 
-body.theme-solarized #preview code {
+body.theme-solarized #preview code, body.theme-solarized .preview-content code {
     background-color: #eee8d5;
 }
 
-body.theme-solarized #preview pre {
+body.theme-solarized #preview pre, body.theme-solarized .preview-content pre {
     background-color: #eee8d5;
 }
 
-body.theme-solarized #preview a {
+body.theme-solarized #preview a, body.theme-solarized .preview-content a {
     color: #268bd2;
 }
 
@@ -484,29 +531,29 @@ body.theme-monokai #preview-pane {
     background: #272822;
 }
 
-body.theme-monokai #preview {
+body.theme-monokai #preview, body.theme-monokai .preview-content {
     color: #f8f8f2;
 }
 
-body.theme-monokai #preview h1,
+body.theme-monokai #preview h1, body.theme-monokai #preview h2,
-body.theme-monokai #preview h2 {
+body.theme-monokai .preview-content h1, body.theme-monokai .preview-content h2 {
     border-bottom-color: #75715e;
 }
 
-body.theme-monokai #preview code {
+body.theme-monokai #preview code, body.theme-monokai .preview-content code {
     background-color: #3e3d32;
 }
 
-body.theme-monokai #preview pre {
+body.theme-monokai #preview pre, body.theme-monokai .preview-content pre {
     background-color: #3e3d32;
 }
 
-body.theme-monokai #preview blockquote {
+body.theme-monokai #preview blockquote, body.theme-monokai .preview-content blockquote {
     color: #75715e;
     border-left-color: #75715e;
 }
 
-body.theme-monokai #preview a {
+body.theme-monokai #preview a, body.theme-monokai .preview-content a {
     color: #66d9ef;
 }
 
@@ -541,29 +588,29 @@ body.theme-github #editor {
     color: #24292e;
 }
 
-body.theme-github #preview {
+body.theme-github #preview, body.theme-github .preview-content {
     color: #24292e;
 }
 
-body.theme-github #preview h1,
+body.theme-github #preview h1, body.theme-github #preview h2,
-body.theme-github #preview h2 {
+body.theme-github .preview-content h1, body.theme-github .preview-content h2 {
     border-bottom-color: #eaecef;
 }
 
-body.theme-github #preview code {
+body.theme-github #preview code, body.theme-github .preview-content code {
     background-color: rgba(27,31,35,0.05);
 }
 
-body.theme-github #preview pre {
+body.theme-github #preview pre, body.theme-github .preview-content pre {
     background-color: #f6f8fa;
 }
 
-body.theme-github #preview blockquote {
+body.theme-github #preview blockquote, body.theme-github .preview-content blockquote {
     color: #6a737d;
     border-left-color: #dfe2e5;
 }
 
-body.theme-github #preview a {
+body.theme-github #preview a, body.theme-github .preview-content a {
     color: #0366d6;
 }
 
@@ -574,6 +621,15 @@ body.theme-github .status-bar {
 }
 
 /* Hide preview pane by default */
+.pane.hidden {
+    display: none;
+}
+
+.pane.full-width {
+    border-right: none;
+}
+
+/* Legacy support */
 #preview-pane.hidden {
     display: none;
 }