diff --git a/static/css/app.css b/static/css/app.css
index ae7f56b..b13c066 100644
--- a/static/css/app.css
+++ b/static/css/app.css
@@ -1653,24 +1653,6 @@ body.dnd-mode .timer-display {
 /* PDF invert */
 #reader-overlay.pdf-inverted .pdf-page { filter:invert(1); }
 
-/* ---- Immersive reader mode ---- */
-.navbar         { transition: transform 0.35s ease; }
-.now-playing-bar{ transition: transform 0.35s ease; }
-.reader-overlay { transition: top 0.35s ease, bottom 0.35s ease; }
-.reader-header  { overflow: hidden; max-height: 60px;
-                  transition: max-height 0.35s ease, padding-top 0.35s ease, padding-bottom 0.35s ease; }
-
-body.reader-immersive .navbar          { transform: translateY(-100%); }
-body.reader-immersive .now-playing-bar { transform: translateY(100%); }
-body.reader-immersive .reader-overlay  { top: 0; bottom: 0; }
-body.reader-immersive .reader-header   { max-height: 0; padding-top: 0; padding-bottom: 0; }
-
-body.reader-immersive.reader-show-top .navbar         { transform: none; }
-body.reader-immersive.reader-show-top .reader-overlay { top: var(--nav-h); }
-body.reader-immersive.reader-show-top .reader-header  { max-height: 60px; padding-top: 8px; padding-bottom: 8px; }
-
-body.reader-immersive.reader-show-bottom .now-playing-bar { transform: none; }
-body.reader-immersive.reader-show-bottom .reader-overlay  { bottom: var(--bar-h); }
 
 /* PDF paginated */
 .reader-content.pdf-paginated { overflow:hidden !important; display:flex; align-items:center; justify-content:center; }
diff --git a/static/js/app.js b/static/js/app.js
index 944c100..5e81111 100644
--- a/static/js/app.js
+++ b/static/js/app.js
@@ -2911,67 +2911,6 @@ async function renderPdf(arrayBuffer, contentEl, scaleOverride) {
   return {title: pdfTitle, author: pdfAuthor, toc, numPages: pdf.numPages};
 }
 
-// ---------------------------------------------------------------------------
-// Immersive reader mode — bars slide out after 5 s, return on edge hover/tap
-// ---------------------------------------------------------------------------
-let _immTimer = null;
-let _immTopShowing  = false;
-let _immBottomShowing = false;
-const _IMM_DELAY = 5000;
-const _IMM_EDGE  = 60; // px from top/bottom edge
-
-function _immMouseMove(e) {
-  // When bars are already showing, extend threshold to cover their actual height
-  const topThreshold = _immTopShowing
-    ? (document.querySelector('.navbar')?.offsetHeight ?? 0) +
-      (document.querySelector('.reader-header')?.offsetHeight ?? 0) + 12
-    : _IMM_EDGE;
-  const bottomThreshold = _immBottomShowing
-    ? (document.querySelector('.now-playing-bar')?.offsetHeight ?? 0) + 12
-    : _IMM_EDGE;
-
-  const atTop    = e.clientY < topThreshold;
-  const atBottom = e.clientY > window.innerHeight - bottomThreshold;
-  if (atTop !== _immTopShowing) {
-    _immTopShowing = atTop;
-    document.body.classList.toggle('reader-show-top', atTop);
-  }
-  if (atBottom !== _immBottomShowing) {
-    _immBottomShowing = atBottom;
-    document.body.classList.toggle('reader-show-bottom', atBottom);
-  }
-}
-
-function _immTouch(e) {
-  const y = (e.touches[0] ?? e.changedTouches[0])?.clientY;
-  if (y == null) return;
-  if (y < _IMM_EDGE) {
-    document.body.classList.add('reader-show-top');
-    clearTimeout(_immTimer);
-    _immTimer = setTimeout(() => document.body.classList.remove('reader-show-top'), 3000);
-  } else if (y > window.innerHeight - _IMM_EDGE) {
-    document.body.classList.add('reader-show-bottom');
-    clearTimeout(_immTimer);
-    _immTimer = setTimeout(() => document.body.classList.remove('reader-show-bottom'), 3000);
-  }
-}
-
-function enterReaderImmersiveMode() {
-  clearTimeout(_immTimer);
-  _immTimer = setTimeout(() => document.body.classList.add('reader-immersive'), _IMM_DELAY);
-  window.addEventListener('mousemove', _immMouseMove);
-  window.addEventListener('touchstart', _immTouch, { passive: true });
-}
-
-function exitReaderImmersiveMode() {
-  clearTimeout(_immTimer);
-  _immTimer = null;
-  document.body.classList.remove('reader-immersive', 'reader-show-top', 'reader-show-bottom');
-  _immTopShowing = false;
-  _immBottomShowing = false;
-  window.removeEventListener('mousemove', _immMouseMove);
-  window.removeEventListener('touchstart', _immTouch);
-}
 
 async function openBook(bookId) {
   const overlay = $('reader-overlay');
@@ -3160,8 +3099,6 @@ async function openBook(bookId) {
       }
     }
 
-    enterReaderImmersiveMode();
-
   } catch (e) {
     overlay.style.display = 'none';
     alert(`Failed to open book: ${e.message}`);
@@ -3251,7 +3188,6 @@ async function saveReaderProgress() {
 }
 
 function closeReader() {
-  exitReaderImmersiveMode();
   // Save progress BEFORE hiding — scrollHeight/clientHeight return 0 once display:none
   saveReaderProgress();
   if (bookmarksDirty) saveBookmarks();