chore: bump version to 0.4.0

Add mobile responsive design

.gitignore

@@ -7,3 +7,7 @@ dist
 # Misc
 *.log
 .DS_Store
+
+# Applesauce Reference
+applesauce
+

CHANGELOG.md

@@ -5,6 +5,61 @@ 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).
 
+## [Unreleased]
+
+### Added
+- Mobile-responsive design with overlay sidebar drawer
+- Media query hooks for responsive behavior (`useIsMobile`, `useIsTablet`, `useIsCoarsePointer`)
+- Auto-collapse sidebar setting for mobile devices
+- Touch-optimized UI with 44x44px minimum touch targets
+- Safe area inset support for notched devices
+- Mobile hamburger menu and backdrop
+- Focus trap in mobile sidebar with ESC key support
+- Body scroll locking when mobile sidebar is open
+- Mobile-optimized modals (full-screen sheet style)
+- Mobile-optimized toast notifications (bottom position)
+- Dynamic viewport height support (100dvh)
+
+### Changed
+- Sidebar now displays as overlay drawer on mobile (≤768px)
+- Highlights panel hidden on mobile for better content focus
+- Sidebar auto-closes when selecting content on mobile
+- Hover effects disabled on touch devices
+
+## [0.3.8] - 2025-10-10
+
+### Fixed
+- Add vercel.json configuration to properly handle SPA routing on Vercel deployments (fixes 404 errors on page refresh)
+
+## [0.3.7] - 2025-10-10
+
+### Fixed
+- Logout button functionality - now properly clears active account using clearActive() method
+
+## [0.3.6] - 2025-10-10
+
+### Added
+- Compact date format for highlights (now, 5m, 3h, 2d, 1mo, 1y)
+- Ultra-compact date format for bookmarks sidebar
+- Encode event links as nevent/naddr per NIP-19 for better client compatibility
+- Render /explore within ThreePaneLayout to keep side panels visible
+
+### Fixed
+- Remove incorrect padding-right from highlights container
+- Reduce font size of highlight metadata for cleaner look
+- Position highlight FAB button relative to article pane instead of viewport
+- Adjust relay indicator position for better visual alignment
+- Ensure highlight metadata elements align on single visual line with consistent line-height
+- Prevent bookmark icons from being cut off in compact view
+- Clean up nested borders in bookmark items and sidebar view mode controls
+- Align highlight metadata elements on single line in sidebar
+- Change explore header icon from compass to newspaper
+
+### Changed
+- Make connecting notification more subtle with muted blue background
+- Update Boris pubkey for zap splits to npub19802see0gnk3vjlus0dnmfdagusqrtmsxpl5yfmkwn9uvnfnqylqduhr0x
+- Update domain references to read.withboris.com (URLs, SEO metadata, and documentation)
+
 ## [0.3.5] - 2025-10-09
 
 ### Fixed
@@ -509,6 +564,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Optimize relay usage following applesauce-relay best practices
 - Use applesauce-react event models for better profile handling
 
+[0.3.6]: https://github.com/dergigi/boris/compare/v0.3.5...v0.3.6
 [0.3.5]: https://github.com/dergigi/boris/compare/v0.3.4...v0.3.5
 [0.3.4]: https://github.com/dergigi/boris/compare/v0.3.3...v0.3.4
 [0.3.3]: https://github.com/dergigi/boris/compare/v0.3.2...v0.3.3

MOBILE_IMPLEMENTATION.md

@@ -0,0 +1,156 @@
+# Mobile Implementation Summary
+
+## Overview
+Boris is now mobile-friendly! The app now works seamlessly on mobile devices with a responsive design that includes:
+- Auto-collapsing sidebar that opens as an overlay drawer on small screens
+- Touch-optimized UI with proper touch target sizes (44x44px minimum)
+- Safe area insets for notched devices (iPhone X+, etc.)
+- Focus trap and keyboard navigation in the mobile sidebar
+- Mobile-optimized modals, toasts, and other UI elements
+
+## Changes Made
+
+### 1. Viewport & Base Setup
+**File: `index.html`**
+- Updated viewport meta tag to include `viewport-fit=cover` for proper safe area handling
+
+### 2. Media Query Hooks
+**File: `src/hooks/useMediaQuery.ts` (NEW)**
+- `useMediaQuery(query)` - Generic hook for any media query
+- `useIsMobile()` - Detects mobile viewport (≤768px)
+- `useIsTablet()` - Detects tablet viewport (≤1024px)
+- `useIsCoarsePointer()` - Detects touch devices
+
+### 3. Mobile CSS Styles
+**File: `src/index.css`**
+- Added CSS custom properties for mobile breakpoints and safe areas
+- Mobile-specific three-pane layout that stacks into single column
+- Overlay sidebar with backdrop and transitions
+- Touch target improvements (44x44px minimum)
+- Disabled hover effects on touch devices
+- Mobile-optimized modals (full-screen sheet style)
+- Mobile-optimized toasts (bottom position with safe area)
+- Dynamic viewport height support (`100dvh`)
+- Overscroll behavior and body scroll locking
+
+### 4. Sidebar State Management
+**File: `src/hooks/useBookmarksUI.ts`**
+- Added `isMobile` state from media query
+- Added `isSidebarOpen` state for mobile overlay
+- Added `toggleSidebar()` function
+- Auto-collapse logic based on `autoCollapseSidebarOnMobile` setting
+- Mobile sidebar defaults to closed, desktop defaults to open
+
+### 5. Three-Pane Layout Mobile Support
+**File: `src/components/ThreePaneLayout.tsx`**
+- Mobile hamburger button (visible only on mobile)
+- Mobile backdrop for closing sidebar
+- Body scroll locking when sidebar is open
+- ESC key handler to close sidebar
+- Focus trap in sidebar (Tab navigation stays within sidebar)
+- Focus restoration when closing sidebar
+- Accessibility attributes (`aria-hidden`, `aria-expanded`, etc.)
+
+### 6. Sidebar Header Mobile Controls
+**File: `src/components/SidebarHeader.tsx`**
+- Close button (X) visible on mobile instead of collapse chevron
+- Hamburger button hidden in header (shown in layout instead)
+
+### 7. Bookmark List Mobile Props
+**File: `src/components/BookmarkList.tsx`**
+- Added `isMobile` prop support
+- Passes mobile state to SidebarHeader
+
+### 8. Main Bookmarks Component
+**File: `src/components/Bookmarks.tsx`**
+- Uses mobile state from `useBookmarksUI`
+- Auto-closes sidebar when selecting bookmark on mobile
+- Closes sidebar when opening settings on mobile
+- Proper desktop/mobile toggle behavior
+
+### 9. Icon Button Enhancement
+**File: `src/components/IconButton.tsx`**
+- Added optional `className` prop for additional styling
+
+### 10. Mobile Settings
+**File: `src/services/settingsService.ts`**
+- Added `autoCollapseSidebarOnMobile?: boolean` setting (default: true)
+
+**File: `src/components/Settings/StartupPreferencesSettings.tsx`**
+- Added UI toggle for "Auto-collapse sidebar on small screens"
+
+## Accessibility Features
+- Focus trap in mobile sidebar (Tab key navigation stays within drawer)
+- ESC key closes mobile sidebar
+- Backdrop click closes mobile sidebar
+- Proper ARIA attributes (`aria-hidden`, `aria-expanded`, `aria-controls`)
+- Touch target minimum size enforcement (44x44px)
+- Focus restoration when closing sidebar
+
+## Mobile Behaviors
+1. **Sidebar**: Slides in from left as overlay drawer with backdrop
+2. **Hamburger Menu**: Fixed position top-left when sidebar closed
+3. **Selecting Content**: Auto-closes sidebar on mobile
+4. **Opening Settings**: Auto-closes sidebar on mobile
+5. **Highlights Panel**: Hidden on mobile (content takes full width)
+6. **Modals**: Full-screen sheet style from bottom
+7. **Toasts**: Bottom position with safe area padding
+
+## Responsive Breakpoints
+- **Mobile**: ≤768px (sidebar overlay, single column)
+- **Tablet**: ≤1024px (defined but not actively used yet)
+- **Desktop**: >768px (three-pane layout as before)
+
+## Browser Support
+- Modern browsers with CSS Grid support
+- iOS Safari (including safe area insets)
+- Chrome for Android
+- Firefox Mobile
+- Safari on iPadOS
+
+## Safe Area Support
+The app respects device safe areas (notches, home indicators) through CSS environment variables:
+- `env(safe-area-inset-top)`
+- `env(safe-area-inset-bottom)`
+- `env(safe-area-inset-left)`
+- `env(safe-area-inset-right)`
+
+## Future Enhancements
+Potential improvements for future iterations:
+- Swipe gesture to open/close sidebar
+- Pull-to-refresh on mobile
+- Bottom sheet for highlights panel on mobile
+- Optimized font sizes for mobile reading
+- Mobile-specific view mode (perhaps auto-switch to compact on mobile)
+- Haptic feedback on interactions (iOS/Android)
+- Share sheet integration
+- Install prompt for PWA
+
+## Testing Checklist
+- [x] Sidebar opens/closes on mobile
+- [x] Hamburger button visible on mobile
+- [x] Backdrop closes sidebar
+- [x] ESC key closes sidebar
+- [x] Focus trap works in sidebar
+- [x] Selecting bookmark closes sidebar
+- [x] No horizontal scroll
+- [x] Touch targets ≥ 44px
+- [x] Modals are full-screen on mobile
+- [x] Toasts appear at bottom with safe area
+- [x] Build completes without errors
+- [ ] Test on actual iOS device (iPhone)
+- [ ] Test on actual Android device
+- [ ] Test with keyboard navigation
+- [ ] Test with screen reader
+- [ ] Test landscape orientation
+- [ ] Test on various screen sizes (320px, 375px, 414px, 768px)
+
+## Commit History
+1. `feat: update viewport meta for mobile support`
+2. `feat: add media query hooks for responsive design`
+3. `feat: add mobile sidebar state management to useBookmarksUI`
+4. `feat: add mobile-responsive CSS with breakpoints and safe areas`
+5. `feat: implement mobile overlay sidebar with focus trap and ESC handling`
+6. `feat: add mobile auto-collapse setting`
+7. `fix: resolve TypeScript errors for mobile implementation`
+

index.html

@@ -3,7 +3,7 @@
   <head>
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/vite.svg" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
     <title>Boris - Nostr Bookmarks</title>
     <meta name="description" content="Your reading list for the Nostr world. A minimal nostr client for bookmark management with highlights." />
     <link rel="canonical" href="https://read.withboris.com/" />

package.json

@@ -1,6 +1,6 @@
 {
   "name": "boris",
-  "version": "0.3.6",
+  "version": "0.4.0",
   "description": "A minimal nostr client for bookmark management",
   "homepage": "https://read.withboris.com/",
   "type": "module",

src/App.tsx

@@ -27,8 +27,7 @@ function AppRoutes({
   const accountManager = Hooks.useAccountManager()
 
   const handleLogout = () => {
-    accountManager.setActive(undefined as never)
-    localStorage.removeItem('active')
+    accountManager.clearActive()
     showToast('Logged out successfully')
   }
 

src/components/BookmarkList.tsx

@@ -27,6 +27,7 @@ interface BookmarkListProps {
   loading?: boolean
   relayPool: RelayPool | null
   settings?: UserSettings
+  isMobile?: boolean
 }
 
 export const BookmarkList: React.FC<BookmarkListProps> = ({
@@ -44,7 +45,8 @@ export const BookmarkList: React.FC<BookmarkListProps> = ({
   lastFetchTime,
   loading = false,
   relayPool,
-  settings
+  settings,
+  isMobile = false
 }) => {
   // Helper to check if a bookmark has either content or a URL
   const hasContentOrUrl = (ib: IndividualBookmark) => {
@@ -106,6 +108,7 @@ export const BookmarkList: React.FC<BookmarkListProps> = ({
         onLogout={onLogout}
         onOpenSettings={onOpenSettings}
         relayPool={relayPool}
+        isMobile={isMobile}
       />
       
       {loading ? (

src/components/Bookmarks.tsx

@@ -67,6 +67,9 @@ const Bookmarks: React.FC<BookmarksProps> = ({ relayPool, onLogout }) => {
   })
 
   const {
+    isMobile,
+    isSidebarOpen,
+    toggleSidebar,
     isCollapsed,
     setIsCollapsed,
     isHighlightsCollapsed,
@@ -116,7 +119,7 @@ const Bookmarks: React.FC<BookmarksProps> = ({ relayPool, onLogout }) => {
     setReaderLoading,
     readerContent,
     setReaderContent,
-    handleSelectUrl
+    handleSelectUrl: baseHandleSelectUrl
   } = useContentSelection({
     relayPool,
     settings,
@@ -125,6 +128,14 @@ const Bookmarks: React.FC<BookmarksProps> = ({ relayPool, onLogout }) => {
     setCurrentArticle
   })
 
+  // Wrap handleSelectUrl to close mobile sidebar when selecting content
+  const handleSelectUrl = (url: string, bookmark?: { id: string; kind: number; tags: string[][]; pubkey: string }) => {
+    if (isMobile && isSidebarOpen) {
+      toggleSidebar()
+    }
+    baseHandleSelectUrl(url, bookmark)
+  }
+
   const {
     highlightButtonRef,
     handleTextSelection,
@@ -180,6 +191,7 @@ const Bookmarks: React.FC<BookmarksProps> = ({ relayPool, onLogout }) => {
     <ThreePaneLayout
       isCollapsed={isCollapsed}
       isHighlightsCollapsed={isHighlightsCollapsed}
+      isSidebarOpen={isSidebarOpen}
       showSettings={showSettings}
       showExplore={showExplore}
       bookmarks={bookmarks}
@@ -187,12 +199,16 @@ const Bookmarks: React.FC<BookmarksProps> = ({ relayPool, onLogout }) => {
       viewMode={viewMode}
       isRefreshing={isRefreshing}
       lastFetchTime={lastFetchTime}
-      onToggleSidebar={() => setIsCollapsed(!isCollapsed)}
+      onToggleSidebar={isMobile ? toggleSidebar : () => setIsCollapsed(!isCollapsed)}
       onLogout={onLogout}
       onViewModeChange={setViewMode}
       onOpenSettings={() => {
         navigate('/settings')
-        setIsCollapsed(true)
+        if (isMobile) {
+          toggleSidebar()
+        } else {
+          setIsCollapsed(true)
+        }
         setIsHighlightsCollapsed(true)
       }}
       onRefresh={handleRefreshAll}

src/components/IconButton.tsx

@@ -11,6 +11,7 @@ interface IconButtonProps {
   size?: number
   disabled?: boolean
   spin?: boolean
+  className?: string
 }
 
 const IconButton: React.FC<IconButtonProps> = ({
@@ -21,11 +22,12 @@ const IconButton: React.FC<IconButtonProps> = ({
   variant = 'ghost',
   size = 33,
   disabled = false,
-  spin = false
+  spin = false,
+  className = ''
 }) => {
   return (
     <button
-      className={`icon-button ${variant}`}
+      className={`icon-button ${variant} ${className}`.trim()}
       onClick={onClick}
       title={title}
       aria-label={ariaLabel || title}

src/components/Settings/StartupPreferencesSettings.tsx

@@ -49,6 +49,19 @@ const StartupPreferencesSettings: React.FC<StartupPreferencesSettingsProps> = ({
           <span>Rebroadcast events while browsing</span>
         </label>
       </div>
+
+      <div className="setting-group">
+        <label htmlFor="autoCollapseSidebarOnMobile" className="checkbox-label">
+          <input
+            id="autoCollapseSidebarOnMobile"
+            type="checkbox"
+            checked={settings.autoCollapseSidebarOnMobile !== false}
+            onChange={(e) => onUpdate({ autoCollapseSidebarOnMobile: e.target.checked })}
+            className="setting-checkbox"
+          />
+          <span>Auto-collapse sidebar on small screens</span>
+        </label>
+      </div>
     </div>
   )
 }

src/components/SidebarHeader.tsx

@@ -1,7 +1,7 @@
 import React, { useState } from 'react'
 import { useNavigate } from 'react-router-dom'
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
-import { faChevronRight, faRightFromBracket, faRightToBracket, faUserCircle, faGear, faHome, faPlus, faNewspaper } from '@fortawesome/free-solid-svg-icons'
+import { faChevronRight, faRightFromBracket, faRightToBracket, faUserCircle, faGear, faHome, faPlus, faNewspaper, faTimes } from '@fortawesome/free-solid-svg-icons'
 import { Hooks } from 'applesauce-react'
 import { useEventModel } from 'applesauce-react/hooks'
 import { Models } from 'applesauce-core'
@@ -17,9 +17,10 @@ interface SidebarHeaderProps {
   onLogout: () => void
   onOpenSettings: () => void
   relayPool: RelayPool | null
+  isMobile?: boolean
 }
 
-const SidebarHeader: React.FC<SidebarHeaderProps> = ({ onToggleCollapse, onLogout, onOpenSettings, relayPool }) => {
+const SidebarHeader: React.FC<SidebarHeaderProps> = ({ onToggleCollapse, onLogout, onOpenSettings, relayPool, isMobile = false }) => {
   const [isConnecting, setIsConnecting] = useState(false)
   const [showAddModal, setShowAddModal] = useState(false)
   const navigate = useNavigate()
@@ -66,14 +67,25 @@ const SidebarHeader: React.FC<SidebarHeaderProps> = ({ onToggleCollapse, onLogou
   return (
     <>
       <div className="sidebar-header-bar">
-        <button 
-          onClick={onToggleCollapse}
-          className="toggle-sidebar-btn"
-          title="Collapse bookmarks sidebar"
-          aria-label="Collapse bookmarks sidebar"
-        >
-          <FontAwesomeIcon icon={faChevronRight} />
-        </button>
+        {isMobile ? (
+          <IconButton
+            icon={faTimes}
+            onClick={onToggleCollapse}
+            title="Close sidebar"
+            ariaLabel="Close sidebar"
+            variant="ghost"
+            className="mobile-close-btn"
+          />
+        ) : (
+          <button 
+            onClick={onToggleCollapse}
+            className="toggle-sidebar-btn"
+            title="Collapse bookmarks sidebar"
+            aria-label="Collapse bookmarks sidebar"
+          >
+            <FontAwesomeIcon icon={faChevronRight} />
+          </button>
+        )}
         <div className="sidebar-header-right">
         <div 
           className="profile-avatar" 

src/components/ThreePaneLayout.tsx

@@ -1,4 +1,6 @@
-import React from 'react'
+import React, { useEffect, useRef } from 'react'
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
+import { faBookmark, faHighlighter } from '@fortawesome/free-solid-svg-icons'
 import { RelayPool } from 'applesauce-relay'
 import { IEventStore } from 'applesauce-core'
 import { BookmarkList } from './BookmarkList'
@@ -16,11 +18,13 @@ import { UserSettings } from '../services/settingsService'
 import { HighlightVisibility } from './HighlightsPanel'
 import { HighlightButtonRef } from './HighlightButton'
 import { BookmarkReference } from '../utils/contentLoader'
+import { useIsMobile } from '../hooks/useMediaQuery'
 
 interface ThreePaneLayoutProps {
   // Layout state
   isCollapsed: boolean
   isHighlightsCollapsed: boolean
+  isSidebarOpen: boolean
   showSettings: boolean
   showExplore?: boolean
   
@@ -79,14 +83,167 @@ interface ThreePaneLayoutProps {
 }
 
 const ThreePaneLayout: React.FC<ThreePaneLayoutProps> = (props) => {
+  const isMobile = useIsMobile()
+  const sidebarRef = useRef<HTMLDivElement>(null)
+  const highlightsRef = useRef<HTMLDivElement>(null)
+
+  // Lock body scroll when mobile sidebar or highlights is open
+  useEffect(() => {
+    if (isMobile && (props.isSidebarOpen || !props.isHighlightsCollapsed)) {
+      document.body.classList.add('mobile-sidebar-open')
+    } else {
+      document.body.classList.remove('mobile-sidebar-open')
+    }
+    
+    return () => {
+      document.body.classList.remove('mobile-sidebar-open')
+    }
+  }, [isMobile, props.isSidebarOpen, props.isHighlightsCollapsed])
+
+  // Handle ESC key to close sidebar or highlights
+  useEffect(() => {
+    if (!isMobile) return
+    if (!props.isSidebarOpen && props.isHighlightsCollapsed) return
+
+    const handleEscape = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        if (props.isSidebarOpen) {
+          props.onToggleSidebar()
+        } else if (!props.isHighlightsCollapsed) {
+          props.onToggleHighlightsPanel()
+        }
+      }
+    }
+
+    document.addEventListener('keydown', handleEscape)
+    return () => document.removeEventListener('keydown', handleEscape)
+  }, [isMobile, props.isSidebarOpen, props.isHighlightsCollapsed, props.onToggleSidebar, props.onToggleHighlightsPanel])
+
+  // Trap focus in sidebar when open on mobile
+  useEffect(() => {
+    if (!isMobile || !props.isSidebarOpen || !sidebarRef.current) return
+
+    const sidebar = sidebarRef.current
+    const focusableElements = sidebar.querySelectorAll<HTMLElement>(
+      'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
+    )
+    const firstElement = focusableElements[0]
+    const lastElement = focusableElements[focusableElements.length - 1]
+
+    const handleTab = (e: KeyboardEvent) => {
+      if (e.key !== 'Tab') return
+
+      if (e.shiftKey) {
+        if (document.activeElement === firstElement) {
+          e.preventDefault()
+          lastElement?.focus()
+        }
+      } else {
+        if (document.activeElement === lastElement) {
+          e.preventDefault()
+          firstElement?.focus()
+        }
+      }
+    }
+
+    sidebar.addEventListener('keydown', handleTab)
+    firstElement?.focus()
+
+    return () => {
+      sidebar.removeEventListener('keydown', handleTab)
+    }
+  }, [isMobile, props.isSidebarOpen])
+
+  // Trap focus in highlights panel when open on mobile
+  useEffect(() => {
+    if (!isMobile || props.isHighlightsCollapsed || !highlightsRef.current) return
+
+    const highlights = highlightsRef.current
+    const focusableElements = highlights.querySelectorAll<HTMLElement>(
+      'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
+    )
+    const firstElement = focusableElements[0]
+    const lastElement = focusableElements[focusableElements.length - 1]
+
+    const handleTab = (e: KeyboardEvent) => {
+      if (e.key !== 'Tab') return
+
+      if (e.shiftKey) {
+        if (document.activeElement === firstElement) {
+          e.preventDefault()
+          lastElement?.focus()
+        }
+      } else {
+        if (document.activeElement === lastElement) {
+          e.preventDefault()
+          firstElement?.focus()
+        }
+      }
+    }
+
+    highlights.addEventListener('keydown', handleTab)
+    firstElement?.focus()
+
+    return () => {
+      highlights.removeEventListener('keydown', handleTab)
+    }
+  }, [isMobile, props.isHighlightsCollapsed])
+
+  const handleBackdropClick = () => {
+    if (isMobile) {
+      if (props.isSidebarOpen) {
+        props.onToggleSidebar()
+      } else if (!props.isHighlightsCollapsed) {
+        props.onToggleHighlightsPanel()
+      }
+    }
+  }
+
   return (
     <>
+      {/* Mobile bookmark button - only show when viewing article */}
+      {isMobile && !props.isSidebarOpen && props.isHighlightsCollapsed && (
+        <button
+          className="mobile-hamburger-btn"
+          onClick={props.onToggleSidebar}
+          aria-label="Open bookmarks"
+          aria-expanded={props.isSidebarOpen}
+        >
+          <FontAwesomeIcon icon={faBookmark} />
+        </button>
+      )}
+
+      {/* Mobile highlights button - only show when viewing article */}
+      {isMobile && !props.isSidebarOpen && props.isHighlightsCollapsed && (
+        <button
+          className="mobile-highlights-btn"
+          onClick={props.onToggleHighlightsPanel}
+          aria-label="Open highlights"
+          aria-expanded={!props.isHighlightsCollapsed}
+        >
+          <FontAwesomeIcon icon={faHighlighter} />
+        </button>
+      )}
+
+      {/* Mobile backdrop */}
+      {isMobile && (
+        <div
+          className={`mobile-sidebar-backdrop ${(props.isSidebarOpen || !props.isHighlightsCollapsed) ? 'visible' : ''}`}
+          onClick={handleBackdropClick}
+          aria-hidden="true"
+        />
+      )}
+
       <div className={`three-pane ${props.isCollapsed ? 'sidebar-collapsed' : ''} ${props.isHighlightsCollapsed ? 'highlights-collapsed' : ''}`}>
-        <div className="pane sidebar">
+        <div 
+          ref={sidebarRef}
+          className={`pane sidebar ${isMobile && props.isSidebarOpen ? 'mobile-open' : ''}`}
+          aria-hidden={isMobile && !props.isSidebarOpen}
+        >
           <BookmarkList 
             bookmarks={props.bookmarks}
             onSelectUrl={props.onSelectUrl}
-            isCollapsed={props.isCollapsed}
+            isCollapsed={isMobile ? false : props.isCollapsed}
             onToggleCollapse={props.onToggleSidebar}
             onLogout={props.onLogout}
             viewMode={props.viewMode}
@@ -99,9 +256,10 @@ const ThreePaneLayout: React.FC<ThreePaneLayoutProps> = (props) => {
             loading={props.bookmarksLoading}
             relayPool={props.relayPool}
             settings={props.settings}
+            isMobile={isMobile}
           />
         </div>
-        <div className="pane main">
+        <div className={`pane main ${isMobile && (props.isSidebarOpen || !props.isHighlightsCollapsed) ? 'mobile-hidden' : ''}`}>
           {props.showSettings ? (
             <Settings 
               settings={props.settings}
@@ -139,7 +297,11 @@ const ThreePaneLayout: React.FC<ThreePaneLayoutProps> = (props) => {
             />
           )}
         </div>
-        <div className="pane highlights">
+        <div 
+          ref={highlightsRef}
+          className={`pane highlights ${isMobile && !props.isHighlightsCollapsed ? 'mobile-open' : ''}`}
+          aria-hidden={isMobile && props.isHighlightsCollapsed}
+        >
           <HighlightsPanel
             highlights={props.highlights}
             loading={props.highlightsLoading}

src/hooks/useBookmarksUI.ts

@@ -3,12 +3,15 @@ import { NostrEvent } from 'nostr-tools'
 import { HighlightVisibility } from '../components/HighlightsPanel'
 import { UserSettings } from '../services/settingsService'
 import { ViewMode } from '../components/Bookmarks'
+import { useIsMobile } from './useMediaQuery'
 
 interface UseBookmarksUIParams {
   settings: UserSettings
 }
 
 export const useBookmarksUI = ({ settings }: UseBookmarksUIParams) => {
+  const isMobile = useIsMobile()
+  const [isSidebarOpen, setIsSidebarOpen] = useState(false)
   const [isCollapsed, setIsCollapsed] = useState(true)
   const [isHighlightsCollapsed, setIsHighlightsCollapsed] = useState(true)
   const [viewMode, setViewMode] = useState<ViewMode>('compact')
@@ -23,6 +26,16 @@ export const useBookmarksUI = ({ settings }: UseBookmarksUIParams) => {
     mine: true
   })
 
+  // Auto-collapse sidebar on mobile based on settings
+  useEffect(() => {
+    const autoCollapse = settings.autoCollapseSidebarOnMobile !== false
+    if (isMobile && autoCollapse) {
+      setIsSidebarOpen(false)
+    } else if (!isMobile) {
+      setIsSidebarOpen(true)
+    }
+  }, [isMobile, settings.autoCollapseSidebarOnMobile])
+
   // Apply UI settings
   useEffect(() => {
     if (settings.defaultViewMode) setViewMode(settings.defaultViewMode)
@@ -34,7 +47,15 @@ export const useBookmarksUI = ({ settings }: UseBookmarksUIParams) => {
     })
   }, [settings])
 
+  const toggleSidebar = () => {
+    setIsSidebarOpen(prev => !prev)
+  }
+
   return {
+    isMobile,
+    isSidebarOpen,
+    setIsSidebarOpen,
+    toggleSidebar,
     isCollapsed,
     setIsCollapsed,
     isHighlightsCollapsed,

src/hooks/useMediaQuery.ts

@@ -0,0 +1,62 @@
+import { useState, useEffect } from 'react'
+
+/**
+ * Hook to detect if a media query matches
+ * @param query The media query string (e.g., '(max-width: 768px)')
+ * @returns true if the media query matches, false otherwise
+ */
+export function useMediaQuery(query: string): boolean {
+  const [matches, setMatches] = useState(() => {
+    if (typeof window === 'undefined') return false
+    return window.matchMedia(query).matches
+  })
+
+  useEffect(() => {
+    if (typeof window === 'undefined') return
+
+    const mediaQuery = window.matchMedia(query)
+    
+    // Update state if the media query changes
+    const handleChange = (event: MediaQueryListEvent) => {
+      setMatches(event.matches)
+    }
+
+    // Modern browsers
+    if (mediaQuery.addEventListener) {
+      mediaQuery.addEventListener('change', handleChange)
+      return () => mediaQuery.removeEventListener('change', handleChange)
+    } 
+    // Legacy browsers
+    else {
+      mediaQuery.addListener(handleChange)
+      return () => mediaQuery.removeListener(handleChange)
+    }
+  }, [query])
+
+  return matches
+}
+
+/**
+ * Hook to detect if the user is on a coarse pointer device (touch)
+ * @returns true if the user is using a coarse pointer (touch), false otherwise
+ */
+export function useIsCoarsePointer(): boolean {
+  return useMediaQuery('(pointer: coarse)')
+}
+
+/**
+ * Hook to detect if the viewport is mobile-sized
+ * @returns true if viewport width is <= 768px, false otherwise
+ */
+export function useIsMobile(): boolean {
+  return useMediaQuery('(max-width: 768px)')
+}
+
+/**
+ * Hook to detect if the viewport is tablet-sized
+ * @returns true if viewport width is <= 1024px, false otherwise
+ */
+export function useIsTablet(): boolean {
+  return useMediaQuery('(max-width: 1024px)')
+}
+

src/index.css

@@ -22,12 +22,40 @@
   --highlights-collapsed-width: 56px;
   --main-max-width: 900px;
   --main-horizontal-padding: 1rem;
+  
+  /* Mobile breakpoints */
+  --mobile-breakpoint: 768px;
+  --tablet-breakpoint: 1024px;
+  
+  /* Mobile touch target minimum */
+  --min-touch-target: 44px;
+  
+  /* Safe area insets for notched devices */
+  --safe-area-top: env(safe-area-inset-top, 0px);
+  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
+  --safe-area-left: env(safe-area-inset-left, 0px);
+  --safe-area-right: env(safe-area-inset-right, 0px);
 }
 
 body {
   margin: 0;
   min-width: 320px;
   min-height: 100vh;
+  overscroll-behavior: none;
+  -webkit-overflow-scrolling: touch;
+}
+
+/* Use dynamic viewport height if supported */
+@supports (height: 100dvh) {
+  body {
+    min-height: 100dvh;
+  }
+}
+
+body.mobile-sidebar-open {
+  overflow: hidden;
+  position: fixed;
+  width: 100%;
 }
 
 #root {
@@ -36,6 +64,12 @@ body {
   padding: 1rem;
 }
 
+@media (max-width: 768px) {
+  #root {
+    padding: 0;
+  }
+}
+
 .app {
   text-align: center;
   position: relative;
@@ -106,6 +140,47 @@ body {
   margin-left: auto;
 }
 
+.mobile-hamburger-btn {
+  display: none;
+  position: fixed;
+  top: 1rem;
+  left: 1rem;
+  z-index: 900;
+  background: #2a2a2a;
+  border: 1px solid #444;
+  border-radius: 8px;
+  color: #ddd;
+  width: var(--min-touch-target);
+  height: var(--min-touch-target);
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+  transition: all 0.2s ease;
+}
+
+.mobile-hamburger-btn:active {
+  transform: scale(0.95);
+}
+
+.mobile-close-btn {
+  display: none;
+}
+
+@media (max-width: 768px) {
+  .mobile-hamburger-btn {
+    display: flex;
+  }
+  
+  .sidebar-header-bar .toggle-sidebar-btn {
+    display: none;
+  }
+  
+  .mobile-close-btn {
+    display: flex;
+  }
+}
+
 .view-mode-controls {
   display: flex;
   align-items: center;
@@ -301,6 +376,29 @@ body {
 
 .icon-button.ghost { background: #2a2a2a; }
 
+/* Mobile touch target improvements */
+@media (max-width: 768px) {
+  .icon-button {
+    min-width: var(--min-touch-target);
+    min-height: var(--min-touch-target);
+  }
+}
+
+/* Disable hover effects on touch devices */
+@media (pointer: coarse) {
+  .icon-button:hover {
+    background: #2a2a2a;
+  }
+  
+  .icon-button.ghost:hover {
+    background: #2a2a2a;
+  }
+  
+  .icon-button:active {
+    background: #333;
+  }
+}
+
 .bookmark-events {
   margin: 1rem 0;
 }
@@ -394,12 +492,24 @@ body {
   text-align: center;
   padding: 3rem;
   color: #888;
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
 }
 
 .empty-state p {
   margin: 0.5rem 0;
 }
 
+.loading {
+  flex: 1;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
 .bookmarks-list {
   display: flex;
   flex-direction: column;
@@ -428,6 +538,13 @@ body {
   column-gap: 0;
   height: calc(100vh - 2rem);
   transition: grid-template-columns 0.3s ease;
+  position: relative;
+}
+
+@supports (height: 100dvh) {
+  .three-pane {
+    height: calc(100dvh - 2rem);
+  }
 }
 
 .three-pane.sidebar-collapsed {
@@ -442,6 +559,22 @@ body {
   grid-template-columns: var(--sidebar-collapsed-width) 1fr var(--highlights-collapsed-width);
 }
 
+/* Mobile three-pane layout */
+@media (max-width: 768px) {
+  .three-pane {
+    grid-template-columns: 1fr;
+    grid-template-rows: 1fr;
+    height: 100vh;
+    height: 100dvh;
+  }
+  
+  .three-pane.sidebar-collapsed,
+  .three-pane.highlights-collapsed,
+  .three-pane.sidebar-collapsed.highlights-collapsed {
+    grid-template-columns: 1fr;
+  }
+}
+
 .pane.sidebar {
   overflow-y: auto;
   height: 100%;
@@ -471,6 +604,133 @@ body {
   height: 100%;
 }
 
+/* Ensure panes are stacked in the correct order on desktop */
+@media (min-width: 769px) {
+  /* Desktop stacking to keep highlights above main without overlap */
+  .three-pane .pane.sidebar { z-index: 1; }
+  .three-pane .pane.main { z-index: 1; }
+  .three-pane .pane.highlights { z-index: 2; }
+}
+
+/* Mobile pane styles */
+@media (max-width: 768px) {
+  /* Both sidepanes slide in as overlays */
+  .pane.sidebar,
+  .pane.highlights {
+    position: fixed;
+    top: 0;
+    width: 85%;
+    max-width: 320px;
+    height: 100vh;
+    height: 100dvh;
+    background: #1a1a1a;
+    z-index: 1001; /* Above backdrop */
+    transition: transform 0.3s ease;
+    box-shadow: none;
+    display: flex;
+    flex-direction: column;
+  }
+  
+  /* Ensure content fills the mobile sidepanes */
+  .pane.sidebar > *,
+  .pane.highlights > * {
+    width: 100%;
+    height: 100%;
+  }
+  
+  /* Remove borders from containers in mobile overlays */
+  .pane.sidebar .bookmarks-container,
+  .pane.highlights .highlights-container {
+    border: none;
+    border-radius: 0;
+    flex: 1;
+    min-height: 0;
+  }
+  
+  /* Bookmarks sidebar from left */
+  .pane.sidebar {
+    left: 0;
+    transform: translateX(-100%);
+  }
+  
+  .pane.sidebar.mobile-open {
+    transform: translateX(0);
+    box-shadow: 4px 0 12px rgba(0, 0, 0, 0.5);
+  }
+  
+  /* Highlights sidebar from right */
+  .pane.highlights {
+    right: 0;
+    transform: translateX(100%);
+  }
+  
+  .pane.highlights.mobile-open {
+    transform: translateX(0);
+    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.5);
+  }
+  
+  .pane.main {
+    grid-column: 1;
+    grid-row: 1;
+    padding: 0.5rem;
+    max-width: 100%;
+    transition: opacity 0.2s ease;
+  }
+  
+  /* Hide main content when sidepanes are open on mobile */
+  .three-pane .pane.main.mobile-hidden {
+    opacity: 0;
+    pointer-events: none;
+  }
+  
+  .mobile-sidebar-backdrop {
+    display: none;
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(0, 0, 0, 0.45);
+    z-index: 999; /* Below sidepanes */
+    opacity: 0;
+    transition: opacity 0.3s ease;
+  }
+  
+  .mobile-sidebar-backdrop.visible {
+    display: block;
+    opacity: 1;
+  }
+  
+  .mobile-highlights-btn {
+    display: none;
+    position: fixed;
+    top: 1rem;
+    right: 1rem;
+    z-index: 900;
+    background: #2a2a2a;
+    border: 1px solid #444;
+    border-radius: 8px;
+    color: #ddd;
+    width: var(--min-touch-target);
+    height: var(--min-touch-target);
+    align-items: center;
+    justify-content: center;
+    cursor: pointer;
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+    transition: all 0.2s ease;
+  }
+  
+  .mobile-highlights-btn:active {
+    transform: scale(0.95);
+  }
+  
+  @media (max-width: 768px) {
+    .mobile-highlights-btn {
+      display: flex;
+    }
+  }
+}
+
 .reader {
   background: #1a1a1a;
   border: 1px solid #333;
@@ -742,6 +1002,20 @@ body {
   gap: 1.5rem;
 }
 
+@media (max-width: 768px) {
+  .bookmarks-grid {
+    gap: 0.75rem;
+  }
+  
+  .bookmarks-grid.bookmarks-compact {
+    gap: 0.25rem;
+  }
+  
+  .bookmarks-grid.bookmarks-large {
+    gap: 1rem;
+  }
+}
+
 .individual-bookmark {
   background: transparent;
   padding: 1rem;
@@ -2303,6 +2577,27 @@ body {
   font-size: 0.95rem;
 }
 
+@media (max-width: 768px) {
+  .toast {
+    top: auto;
+    bottom: calc(1rem + var(--safe-area-bottom));
+    right: 1rem;
+    left: 1rem;
+    max-width: calc(100% - 2rem);
+  }
+  
+  @keyframes toast-slide-in {
+    from {
+      transform: translateY(100px);
+      opacity: 0;
+    }
+    to {
+      transform: translateY(0);
+      opacity: 1;
+    }
+  }
+}
+
 .toast-success {
   border-color: #28a745;
 }
@@ -2357,6 +2652,22 @@ body {
   box-sizing: border-box;
 }
 
+@media (max-width: 768px) {
+  .modal-overlay {
+    padding: 0;
+    align-items: flex-end;
+  }
+  
+  .modal-content {
+    max-width: 100%;
+    max-height: 95vh;
+    max-height: 95dvh;
+    border-radius: 16px 16px 0 0;
+    margin: 0;
+    padding-bottom: var(--safe-area-bottom);
+  }
+}
+
 .modal-header {
   display: flex;
   align-items: center;

src/services/settingsService.ts

@@ -45,6 +45,8 @@ export interface UserSettings {
   // Image cache settings
   enableImageCache?: boolean // Enable caching images in localStorage
   imageCacheSizeMB?: number // Maximum cache size in megabytes (default: 210MB)
+  // Mobile settings
+  autoCollapseSidebarOnMobile?: boolean // Auto-collapse sidebar on mobile (default: true)
 }
 
 export async function loadSettings(

vercel.json

@@ -0,0 +1,9 @@
+{
+  "rewrites": [
+    {
+      "source": "/(.*)",
+      "destination": "/index.html"
+    }
+  ]
+}
+