diff --git a/web/src/components/AssistantChat/HappyComposer.tsx b/web/src/components/AssistantChat/HappyComposer.tsx
index cdd36bf0..a350b27b 100644
--- a/web/src/components/AssistantChat/HappyComposer.tsx
+++ b/web/src/components/AssistantChat/HappyComposer.tsx
@@ -437,7 +437,7 @@ export function HappyComposer(props: {
 
     return (
         <div className="px-3 pb-3 pt-2 bg-[var(--app-bg)]">
-            <div className="mx-auto w-full max-w-[720px]">
+            <div className="mx-auto w-full max-w-content">
                 <ComposerPrimitive.Root className="relative">
                     {overlays}
 
diff --git a/web/src/components/AssistantChat/HappyThread.tsx b/web/src/components/AssistantChat/HappyThread.tsx
index 434b9873..e8f4795e 100644
--- a/web/src/components/AssistantChat/HappyThread.tsx
+++ b/web/src/components/AssistantChat/HappyThread.tsx
@@ -135,7 +135,7 @@ export function HappyThread(props: {
             <ThreadPrimitive.Root className="flex min-h-0 flex-1 flex-col">
                 <ThreadPrimitive.Viewport asChild autoScroll>
                     <div ref={viewportRef} className="min-h-0 flex-1 overflow-y-auto overflow-x-hidden">
-                        <div className="mx-auto w-full max-w-[720px] min-w-0 p-3">
+                        <div className="mx-auto w-full max-w-content min-w-0 p-3">
                             <div ref={topSentinelRef} className="h-px w-full" aria-hidden="true" />
                             {props.isLoadingMessages ? (
                                 <div className="text-sm text-[var(--app-hint)]">
diff --git a/web/src/components/SessionHeader.tsx b/web/src/components/SessionHeader.tsx
index b0198b0d..d4982f95 100644
--- a/web/src/components/SessionHeader.tsx
+++ b/web/src/components/SessionHeader.tsx
@@ -50,7 +50,7 @@ export function SessionHeader(props: {
 
     return (
         <div className="bg-[var(--app-bg)] pt-[env(safe-area-inset-top)]">
-            <div className="mx-auto w-full max-w-[720px] flex items-center gap-2 p-3">
+            <div className="mx-auto w-full max-w-content flex items-center gap-2 p-3">
                 {/* Back button */}
                 <button
                     type="button"
diff --git a/web/src/components/SessionList.tsx b/web/src/components/SessionList.tsx
index 561b7476..3ca0920a 100644
--- a/web/src/components/SessionList.tsx
+++ b/web/src/components/SessionList.tsx
@@ -100,7 +100,7 @@ export function SessionList(props: {
     isLoading: boolean
 }) {
     return (
-        <div className="flex flex-col">
+        <div className="mx-auto w-full max-w-content flex flex-col">
             <div className="flex items-center justify-between px-3 py-1">
                 <div className="text-xs text-[var(--app-hint)]">
                     {props.sessions.length} sessions
diff --git a/web/src/routes/sessions/file.tsx b/web/src/routes/sessions/file.tsx
index 3cdc308a..a4e74aad 100644
--- a/web/src/routes/sessions/file.tsx
+++ b/web/src/routes/sessions/file.tsx
@@ -175,8 +175,8 @@ export default function FilePage() {
 
     return (
         <div className="flex h-full flex-col">
-            <div className="bg-[var(--app-bg)] border-b border-[var(--app-border)] pt-[env(safe-area-inset-top)]">
-                <div className="mx-auto w-full max-w-[720px] flex items-center gap-2 p-3">
+            <div className="bg-[var(--app-bg)] pt-[env(safe-area-inset-top)]">
+                <div className="mx-auto w-full max-w-content flex items-center gap-2 p-3 border-b border-[var(--app-border)]">
                     <button
                         type="button"
                         onClick={goBack}
@@ -191,61 +191,67 @@ export default function FilePage() {
                 </div>
             </div>
 
-            <div className="border-b border-[var(--app-divider)] bg-[var(--app-bg)] px-3 py-2 flex items-center gap-2">
-                <FileIcon fileName={fileName} size={20} />
-                <span className="text-xs text-[var(--app-hint)]">{filePath}</span>
+            <div className="bg-[var(--app-bg)]">
+                <div className="mx-auto w-full max-w-content px-3 py-2 flex items-center gap-2 border-b border-[var(--app-divider)]">
+                    <FileIcon fileName={fileName} size={20} />
+                    <span className="text-xs text-[var(--app-hint)]">{filePath}</span>
+                </div>
             </div>
 
             {diffContent ? (
-                <div className="border-b border-[var(--app-divider)] bg-[var(--app-bg)] px-3 py-2 flex items-center gap-2">
-                    <button
-                        type="button"
-                        onClick={() => setDisplayMode('diff')}
-                        className={`rounded px-3 py-1 text-xs font-semibold ${displayMode === 'diff' ? 'bg-[var(--app-link)] text-white' : 'bg-[var(--app-subtle-bg)] text-[var(--app-hint)]'}`}
-                    >
-                        Diff
-                    </button>
-                    <button
-                        type="button"
-                        onClick={() => setDisplayMode('file')}
-                        className={`rounded px-3 py-1 text-xs font-semibold ${displayMode === 'file' ? 'bg-[var(--app-link)] text-white' : 'bg-[var(--app-subtle-bg)] text-[var(--app-hint)]'}`}
-                    >
-                        File
-                    </button>
+                <div className="bg-[var(--app-bg)]">
+                    <div className="mx-auto w-full max-w-content px-3 py-2 flex items-center gap-2 border-b border-[var(--app-divider)]">
+                        <button
+                            type="button"
+                            onClick={() => setDisplayMode('diff')}
+                            className={`rounded px-3 py-1 text-xs font-semibold ${displayMode === 'diff' ? 'bg-[var(--app-link)] text-white' : 'bg-[var(--app-subtle-bg)] text-[var(--app-hint)]'}`}
+                        >
+                            Diff
+                        </button>
+                        <button
+                            type="button"
+                            onClick={() => setDisplayMode('file')}
+                            className={`rounded px-3 py-1 text-xs font-semibold ${displayMode === 'file' ? 'bg-[var(--app-link)] text-white' : 'bg-[var(--app-subtle-bg)] text-[var(--app-hint)]'}`}
+                        >
+                            File
+                        </button>
+                    </div>
                 </div>
             ) : null}
 
-            <div className="flex-1 overflow-y-auto p-4">
-                {diffErrorMessage ? (
-                    <div className="mb-3 rounded-md bg-amber-500/10 p-2 text-xs text-[var(--app-hint)]">
-                        {diffErrorMessage}
-                    </div>
-                ) : null}
-                {missingPath ? (
-                    <div className="text-sm text-[var(--app-hint)]">No file path provided.</div>
-                ) : loading ? (
-                    <div className="text-sm text-[var(--app-hint)]">Loading file...</div>
-                ) : fileError ? (
-                    <div className="text-sm text-[var(--app-hint)]">{fileError}</div>
-                ) : binaryFile ? (
-                    <div className="text-sm text-[var(--app-hint)]">
-                        This looks like a binary file. It cannot be displayed.
-                    </div>
-                ) : displayMode === 'diff' && diffContent ? (
-                    <DiffDisplay diffContent={diffContent} />
-                ) : displayMode === 'diff' && diffError ? (
-                    <div className="text-sm text-[var(--app-hint)]">{diffError}</div>
-                ) : displayMode === 'file' ? (
-                    decodedContent ? (
-                        <pre className="shiki overflow-auto rounded-md bg-[var(--app-code-bg)] p-3 text-xs font-mono">
-                            <code>{highlighted ?? decodedContent}</code>
-                        </pre>
+            <div className="flex-1 overflow-y-auto">
+                <div className="mx-auto w-full max-w-content p-4">
+                    {diffErrorMessage ? (
+                        <div className="mb-3 rounded-md bg-amber-500/10 p-2 text-xs text-[var(--app-hint)]">
+                            {diffErrorMessage}
+                        </div>
+                    ) : null}
+                    {missingPath ? (
+                        <div className="text-sm text-[var(--app-hint)]">No file path provided.</div>
+                    ) : loading ? (
+                        <div className="text-sm text-[var(--app-hint)]">Loading file...</div>
+                    ) : fileError ? (
+                        <div className="text-sm text-[var(--app-hint)]">{fileError}</div>
+                    ) : binaryFile ? (
+                        <div className="text-sm text-[var(--app-hint)]">
+                            This looks like a binary file. It cannot be displayed.
+                        </div>
+                    ) : displayMode === 'diff' && diffContent ? (
+                        <DiffDisplay diffContent={diffContent} />
+                    ) : displayMode === 'diff' && diffError ? (
+                        <div className="text-sm text-[var(--app-hint)]">{diffError}</div>
+                    ) : displayMode === 'file' ? (
+                        decodedContent ? (
+                            <pre className="shiki overflow-auto rounded-md bg-[var(--app-code-bg)] p-3 text-xs font-mono">
+                                <code>{highlighted ?? decodedContent}</code>
+                            </pre>
+                        ) : (
+                            <div className="text-sm text-[var(--app-hint)]">File is empty.</div>
+                        )
                     ) : (
-                        <div className="text-sm text-[var(--app-hint)]">File is empty.</div>
-                    )
-                ) : (
-                    <div className="text-sm text-[var(--app-hint)]">No changes to display.</div>
-                )}
+                        <div className="text-sm text-[var(--app-hint)]">No changes to display.</div>
+                    )}
+                </div>
             </div>
         </div>
     )
diff --git a/web/src/routes/sessions/files.tsx b/web/src/routes/sessions/files.tsx
index 2a51a88a..3aa65209 100644
--- a/web/src/routes/sessions/files.tsx
+++ b/web/src/routes/sessions/files.tsx
@@ -249,8 +249,8 @@ export default function FilesPage() {
 
     return (
         <div className="flex h-full flex-col">
-            <div className="bg-[var(--app-bg)] border-b border-[var(--app-border)] pt-[env(safe-area-inset-top)]">
-                <div className="mx-auto w-full max-w-[720px] flex items-center gap-2 p-3">
+            <div className="bg-[var(--app-bg)] pt-[env(safe-area-inset-top)]">
+                <div className="mx-auto w-full max-w-content flex items-center gap-2 p-3 border-b border-[var(--app-border)]">
                     <button
                         type="button"
                         onClick={goBack}
@@ -273,102 +273,108 @@ export default function FilesPage() {
                 </div>
             </div>
 
-            <div className="border-b border-[var(--app-border)] bg-[var(--app-bg)] p-3">
-                <div className="flex items-center gap-2 rounded-md bg-[var(--app-subtle-bg)] px-3 py-2">
-                    <SearchIcon className="text-[var(--app-hint)]" />
-                    <input
-                        value={searchQuery}
-                        onChange={(event) => setSearchQuery(event.target.value)}
-                        placeholder="Search files"
-                        className="w-full bg-transparent text-sm text-[var(--app-fg)] placeholder:text-[var(--app-hint)] focus:outline-none"
-                        autoCapitalize="none"
-                        autoCorrect="off"
-                    />
+            <div className="bg-[var(--app-bg)]">
+                <div className="mx-auto w-full max-w-content p-3 border-b border-[var(--app-border)]">
+                    <div className="flex items-center gap-2 rounded-md bg-[var(--app-subtle-bg)] px-3 py-2">
+                        <SearchIcon className="text-[var(--app-hint)]" />
+                        <input
+                            value={searchQuery}
+                            onChange={(event) => setSearchQuery(event.target.value)}
+                            placeholder="Search files"
+                            className="w-full bg-transparent text-sm text-[var(--app-fg)] placeholder:text-[var(--app-hint)] focus:outline-none"
+                            autoCapitalize="none"
+                            autoCorrect="off"
+                        />
+                    </div>
                 </div>
             </div>
 
             {!gitLoading && gitStatus ? (
-                <div className="border-b border-[var(--app-divider)] bg-[var(--app-bg)] px-3 py-2">
-                    <div className="flex items-center gap-2 text-sm">
-                        <GitBranchIcon className="text-[var(--app-hint)]" />
-                        <span className="font-semibold">{branchLabel}</span>
-                    </div>
-                    <div className="text-xs text-[var(--app-hint)]">
-                        {gitStatus.totalStaged} staged, {gitStatus.totalUnstaged} unstaged
+                <div className="bg-[var(--app-bg)]">
+                    <div className="mx-auto w-full max-w-content px-3 py-2 border-b border-[var(--app-divider)]">
+                        <div className="flex items-center gap-2 text-sm">
+                            <GitBranchIcon className="text-[var(--app-hint)]" />
+                            <span className="font-semibold">{branchLabel}</span>
+                        </div>
+                        <div className="text-xs text-[var(--app-hint)]">
+                            {gitStatus.totalStaged} staged, {gitStatus.totalUnstaged} unstaged
+                        </div>
                     </div>
                 </div>
             ) : null}
 
             <div className="flex-1 overflow-y-auto">
-                {showGitErrorBanner ? (
-                    <div className="border-b border-[var(--app-divider)] bg-amber-500/10 px-3 py-2 text-xs text-[var(--app-hint)]">
-                        {gitError}
-                    </div>
-                ) : null}
-                {gitLoading ? (
-                    <div className="p-6 text-sm text-[var(--app-hint)]">Loading Git status...</div>
-                ) : shouldSearch ? (
-                    searchResults.isLoading ? (
-                        <div className="p-6 text-sm text-[var(--app-hint)]">Loading files...</div>
-                    ) : searchResults.error ? (
-                        <div className="p-6 text-sm text-[var(--app-hint)]">{searchResults.error}</div>
-                    ) : searchResults.files.length === 0 ? (
-                        <div className="p-6 text-sm text-[var(--app-hint)]">
-                            {searchQuery ? 'No files match your search.' : 'No files found in this project.'}
+                <div className="mx-auto w-full max-w-content">
+                    {showGitErrorBanner ? (
+                        <div className="border-b border-[var(--app-divider)] bg-amber-500/10 px-3 py-2 text-xs text-[var(--app-hint)]">
+                            {gitError}
                         </div>
-                    ) : (
-                        <div className="border-t border-[var(--app-divider)]">
-                            {searchResults.files.map((file, index) => (
-                                <SearchResultRow
-                                    key={`${file.fullPath}-${index}`}
-                                    file={file}
-                                    onOpen={() => handleOpenFile(file.fullPath)}
-                                    showDivider={index < searchResults.files.length - 1}
-                                />
-                            ))}
-                        </div>
-                    )
-                ) : (
-                    <div>
-                        {gitStatus?.stagedFiles.length ? (
-                            <div>
-                                <div className="border-b border-[var(--app-divider)] bg-[var(--app-bg)] px-3 py-2 text-xs font-semibold text-[var(--app-git-staged-color)]">
-                                    Staged Changes ({gitStatus.stagedFiles.length})
-                                </div>
-                                {gitStatus.stagedFiles.map((file, index) => (
-                                    <GitFileRow
-                                        key={`staged-${file.fullPath}-${index}`}
-                                        file={file}
-                                        onOpen={() => handleOpenFile(file.fullPath, file.isStaged)}
-                                        showDivider={index < gitStatus.stagedFiles.length - 1 || gitStatus.unstagedFiles.length > 0}
-                                    />
-                                ))}
-                            </div>
-                        ) : null}
-
-                        {gitStatus?.unstagedFiles.length ? (
-                            <div>
-                                <div className="border-b border-[var(--app-divider)] bg-[var(--app-bg)] px-3 py-2 text-xs font-semibold text-[var(--app-git-unstaged-color)]">
-                                    Unstaged Changes ({gitStatus.unstagedFiles.length})
-                                </div>
-                                {gitStatus.unstagedFiles.map((file, index) => (
-                                    <GitFileRow
-                                        key={`unstaged-${file.fullPath}-${index}`}
-                                        file={file}
-                                        onOpen={() => handleOpenFile(file.fullPath, file.isStaged)}
-                                        showDivider={index < gitStatus.unstagedFiles.length - 1}
-                                    />
-                                ))}
-                            </div>
-                        ) : null}
-
-                        {gitStatus && gitStatus.stagedFiles.length === 0 && gitStatus.unstagedFiles.length === 0 ? (
+                    ) : null}
+                    {gitLoading ? (
+                        <div className="p-6 text-sm text-[var(--app-hint)]">Loading Git status...</div>
+                    ) : shouldSearch ? (
+                        searchResults.isLoading ? (
+                            <div className="p-6 text-sm text-[var(--app-hint)]">Loading files...</div>
+                        ) : searchResults.error ? (
+                            <div className="p-6 text-sm text-[var(--app-hint)]">{searchResults.error}</div>
+                        ) : searchResults.files.length === 0 ? (
                             <div className="p-6 text-sm text-[var(--app-hint)]">
-                                No changes detected. Use search to browse files.
+                                {searchQuery ? 'No files match your search.' : 'No files found in this project.'}
                             </div>
-                        ) : null}
-                    </div>
-                )}
+                        ) : (
+                            <div className="border-t border-[var(--app-divider)]">
+                                {searchResults.files.map((file, index) => (
+                                    <SearchResultRow
+                                        key={`${file.fullPath}-${index}`}
+                                        file={file}
+                                        onOpen={() => handleOpenFile(file.fullPath)}
+                                        showDivider={index < searchResults.files.length - 1}
+                                    />
+                                ))}
+                            </div>
+                        )
+                    ) : (
+                        <div>
+                            {gitStatus?.stagedFiles.length ? (
+                                <div>
+                                    <div className="border-b border-[var(--app-divider)] bg-[var(--app-bg)] px-3 py-2 text-xs font-semibold text-[var(--app-git-staged-color)]">
+                                        Staged Changes ({gitStatus.stagedFiles.length})
+                                    </div>
+                                    {gitStatus.stagedFiles.map((file, index) => (
+                                        <GitFileRow
+                                            key={`staged-${file.fullPath}-${index}`}
+                                            file={file}
+                                            onOpen={() => handleOpenFile(file.fullPath, file.isStaged)}
+                                            showDivider={index < gitStatus.stagedFiles.length - 1 || gitStatus.unstagedFiles.length > 0}
+                                        />
+                                    ))}
+                                </div>
+                            ) : null}
+
+                            {gitStatus?.unstagedFiles.length ? (
+                                <div>
+                                    <div className="border-b border-[var(--app-divider)] bg-[var(--app-bg)] px-3 py-2 text-xs font-semibold text-[var(--app-git-unstaged-color)]">
+                                        Unstaged Changes ({gitStatus.unstagedFiles.length})
+                                    </div>
+                                    {gitStatus.unstagedFiles.map((file, index) => (
+                                        <GitFileRow
+                                            key={`unstaged-${file.fullPath}-${index}`}
+                                            file={file}
+                                            onOpen={() => handleOpenFile(file.fullPath, file.isStaged)}
+                                            showDivider={index < gitStatus.unstagedFiles.length - 1}
+                                        />
+                                    ))}
+                                </div>
+                            ) : null}
+
+                            {gitStatus && gitStatus.stagedFiles.length === 0 && gitStatus.unstagedFiles.length === 0 ? (
+                                <div className="p-6 text-sm text-[var(--app-hint)]">
+                                    No changes detected. Use search to browse files.
+                                </div>
+                            ) : null}
+                        </div>
+                    )}
+                </div>
             </div>
         </div>
     )
diff --git a/web/tailwind.config.ts b/web/tailwind.config.ts
index 2d1d6e69..a00b503d 100644
--- a/web/tailwind.config.ts
+++ b/web/tailwind.config.ts
@@ -3,7 +3,11 @@ import type { Config } from 'tailwindcss'
 export default {
     content: ['./index.html', './src/**/*.{ts,tsx}'],
     theme: {
-        extend: {}
+        extend: {
+            maxWidth: {
+                content: '720px'
+            }
+        }
     },
     plugins: []
 } satisfies Config