diff --git a/README.md b/README.md
index 1f36117..f186e4c 100644
--- a/README.md
+++ b/README.md
@@ -7,16 +7,45 @@ Built with Vite + vanilla ES modules, served via nginx in Docker.
 
 ## Features
 
+### Music Library
 - Stream music from your Navidrome / Subsonic library
-- Browse artists, albums, playlists, starred tracks and random picks
-- Queue management with shuffle, repeat (all / once) and radio mode (endless random)
-- Now Playing overlay with swipe-to-dismiss and lock screen media controls (Android/iOS)
-- iTunes / Last.fm integration — charts, global search, 30s previews, recommendations
-- Download tracks from YouTube/SoundCloud via yt-dlp directly into your music library
-- Duplicate detection — skips tracks that already exist on the server
-- Edit playlists (name, description, cover art, public toggle)
-- PWA — installable, offline-capable via service worker
+- Browse artists, albums, playlists, starred tracks, and random picks
+- Sort and filter views (albums, favorites) with chip filters
+- Search/filter bar inside playlist detail and favorites (instant, client-side)
+- Synced and plain lyrics via LRCLIB (auto-fetched per track)
+
+### Playback
+- Queue management with shuffle, repeat (all / once), and radio mode (endless random)
+- Now Playing overlay with swipe-to-dismiss
+- Lock screen media controls (Android / iOS via Media Session API)
+- Gapless-style queue with prev/next, skip forward/back
+
+### Discovery
+- iTunes / Last.fm integration — charts, global search, 30-second previews, similar artists, recommendations
+- Spotify playlist importer — paste a Spotify playlist URL to preview and download all tracks, enriched with iTunes metadata and cover art
+
+### Downloads (yt-dlp backend)
+- Download individual tracks, full albums, or entire artists from YouTube / SoundCloud
+- Spotify playlist importer downloads with iTunes-enriched metadata (album, year, track number, genre, cover art)
+- Duplicate detection — skips tracks already present on the server
+- Lyrics embedded into downloaded files (LRCLIB)
+
+### Playlists
+- Create, edit, and delete playlists
+- Edit playlist name, description, cover art, and public/private toggle
+- Add / remove tracks; reorder via drag and drop
+
+### Audiobookshelf Integration
+- Connect to your Audiobookshelf server (URL + API key)
+- Browse and stream audiobooks from your ABS library
+- Full player: chapters list, playback speed, sleep timer (preset or custom minutes), progress sync
+
+### App
+- PWA — installable on Android / iOS / desktop, offline-capable via service worker
+- Android APK (WebView wrapper with native feel)
+- Multiple color themes
 - Dark theme, mobile-first responsive layout
+- German UI
 
 ---
 
@@ -31,15 +60,23 @@ Music_App/
 │   ├── player.js              # Playback, transport, queue, media session, preview
 │   ├── views.js               # Navigation, page loaders, card makers, search
 │   ├── ui.js                  # Modals, overlays, sidebar, settings, context menu
+│   ├── nowplaying.js          # Now Playing overlay
+│   ├── abs.js                 # Audiobookshelf integration
+│   ├── spotify.js             # Spotify playlist importer
+│   ├── components.js          # Shared UI components
+│   ├── themes.js              # Theme switching
 │   ├── pwa.js                 # Service worker registration + update banner
 │   └── main.js                # App init, audio wiring, window globals
+├── backend/
+│   ├── novasonic-server.js    # Node.js download backend (yt-dlp + ffmpeg)
+│   └── lib/
+│       └── metadata.js        # iTunes lookup, lyrics fetch, artwork download
 ├── public/                    # Static assets (copied as-is to dist/)
 │   ├── sw.js                  # Service worker
 │   ├── manifest.json          # PWA manifest
 │   ├── icon.svg               # App icon
 │   └── config.js              # Runtime config placeholder (generated by Docker)
-├── backend/
-│   └── novasonic-server.js    # Node.js download backend (yt-dlp + ffmpeg)
+├── android/                   # Android WebView APK wrapper
 ├── index.html                 # App shell + Vite entry point
 ├── styles.css                 # All styles
 ├── vite.config.js
@@ -104,3 +141,4 @@ npm run preview  # Preview the production build locally
 2. Enter your Navidrome server URL, username and password
 3. Optionally add a Last.fm API key (Settings) for recommendations and similar artists
 4. Optionally add the backend URL (Settings) to enable yt-dlp downloads
+5. Optionally connect Audiobookshelf (Settings) to stream audiobooks
diff --git a/index.html b/index.html
index 974afc1..e161a25 100644
--- a/index.html
+++ b/index.html
@@ -719,10 +719,9 @@
         <button onclick="absSleepIn(30)">30 Min</button>
         <button onclick="absSleepIn(45)">45 Min</button>
         <button onclick="absSleepIn(60)">60 Min</button>
-        <div id="abs-sleep-custom-row" class="abs-sleep-custom-row" onclick="if(!this.classList.contains('active')){this.classList.add('active');var inp=document.getElementById('abs-sleep-custom-input');inp.value='';inp.focus();}">
-          <span class="abs-sleep-custom-label">Eigene Zeit…</span>
-          <input id="abs-sleep-custom-input" type="number" min="1" max="999" placeholder="Min" onclick="event.stopPropagation()" onkeydown="if(event.key==='Enter'){var v=parseInt(this.value);if(v>0)absSleepIn(v);}">
-          <button onclick="event.stopPropagation();var v=parseInt(document.getElementById('abs-sleep-custom-input').value);if(v>0)absSleepIn(v);">OK</button>
+        <div class="abs-sleep-custom-row">
+          <span class="abs-sleep-custom-label">Eigene Zeit</span>
+          <input id="abs-sleep-custom-input" type="number" min="1" max="999" placeholder="Min" onkeydown="if(event.key==='Enter'){var v=parseInt(this.value);if(v>0)absSleepIn(v);}">
         </div>
       </div>
     </div>
diff --git a/styles.css b/styles.css
index 4d6e0cb..1e31359 100644
--- a/styles.css
+++ b/styles.css
@@ -950,15 +950,12 @@ nav{flex:1;overflow-y:auto;padding:4px 10px}
 .abs-picker button{display:block;width:100%;padding:9px 16px;background:none;border:none;color:var(--text);font-family:var(--font);font-size:13px;cursor:pointer;text-align:left;transition:background .15s;white-space:nowrap}
 .abs-picker button:hover{background:var(--surface2)}
 .abs-picker button.active{color:var(--accent);font-weight:700}
-.abs-sleep-custom-row{display:flex;align-items:center;gap:6px;width:100%;padding:9px 16px;background:none;border:none;border-top:1px solid var(--border2);color:var(--text);font-family:var(--font);font-size:13px;cursor:pointer;text-align:left;box-sizing:border-box;transition:background .15s}
-.abs-sleep-custom-row:hover{background:var(--surface2)}
-.abs-sleep-custom-row.active{background:var(--surface2);cursor:default;padding:8px 10px}
-.abs-sleep-custom-label{flex:1;pointer-events:none}
-.abs-sleep-custom-row.active .abs-sleep-custom-label{display:none}
-.abs-sleep-custom-row input{display:none;flex:1;min-width:0;padding:5px 8px;background:var(--surface);border:1.5px solid var(--accent);border-radius:6px;color:var(--text);font-family:var(--font);font-size:13px;outline:none}
-.abs-sleep-custom-row.active input{display:block}
-.abs-sleep-custom-row button{display:none;padding:5px 12px;background:var(--accent);border:none;border-radius:6px;color:#fff;font-family:var(--font);font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap;flex-shrink:0}
-.abs-sleep-custom-row.active button{display:block}
+.abs-sleep-custom-row{display:flex;align-items:center;gap:8px;width:100%;padding:7px 16px 9px;border-top:1px solid var(--border2);box-sizing:border-box}
+.abs-sleep-custom-label{font-size:11px;color:var(--text3);white-space:nowrap;flex-shrink:0}
+.abs-sleep-custom-row input{flex:1;min-width:0;padding:5px 8px;background:var(--surface);border:1.5px solid var(--border2);border-radius:6px;color:var(--text);font-family:var(--font);font-size:13px;outline:none;transition:border-color .15s}
+.abs-sleep-custom-row input:focus{border-color:var(--accent)}
+.abs-sleep-custom-row input[type=number]::-webkit-inner-spin-button,.abs-sleep-custom-row input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
+.abs-sleep-custom-row input[type=number]{-moz-appearance:textfield}
 .abs-chapter-list{flex-shrink:0;overflow-y:auto;max-height:0;transition:max-height .3s ease;border-top:1px solid transparent}
 .abs-chapter-list.open{max-height:220px;border-color:var(--border)}
 .abs-ch-item{display:flex;align-items:center;gap:10px;padding:8px 20px;cursor:pointer;transition:background .15s}