/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; }

.hidden { display: none !important; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  min-height: 100dvh;
  /* room for fixed player at bottom */
  padding-bottom: calc(128px + env(safe-area-inset-bottom, 0px));
  -webkit-text-size-adjust: 100%;
}

/* ===== Layout ===== */
.page-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
}

/* ===== Header ===== */
.app-header {
  padding: 1.25rem 0 0.75rem;
  padding-left: 90px;
}

@media (max-width: 480px) {
  .app-header { padding-left: 80px; }
}

.app-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.app-subtitle {
  color: #94a3b8;
  font-size: 0.8rem;
  margin-top: 0.2rem;
}

/* ===== Search bar ===== */
.search-wrap {
  position: relative;
  margin: 0.75rem 0 1.25rem;
}

.search-wrap .search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  pointer-events: none;
  color: #64748b;
}

#search-input {
  width: 100%;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 0.75rem;
  padding: 0.8rem 2.75rem 0.8rem 2.75rem;
  /* prevent iOS zoom on focus */
  font-size: max(1rem, 16px);
  color: #e2e8f0;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
}

#search-input::placeholder { color: #475569; }
#search-input:focus { border-color: #7c3aed; }

.search-clear {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #64748b;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* ===== Section headers ===== */
.section-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #a78bfa;
  margin-bottom: 0.75rem;
}

/* ===== Book cards grid ===== */
.books-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  margin-bottom: 2rem;
}

@media (min-width: 420px) {
  .books-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}

.book-card {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 0.75rem;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s;
  display: flex;
  flex-direction: column;
  position: relative;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.book-card:hover, .book-card:focus-visible {
  transform: translateY(-2px);
  border-color: #7c3aed;
  outline: none;
}

.book-card:active { transform: scale(0.97); }

.book-cover {
  aspect-ratio: 2 / 3;
  background: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-cover-placeholder {
  font-size: 2.5rem;
  color: #334155;
}

.book-cover-placeholder.small { font-size: 1.5rem; }
.book-cover-placeholder.large { font-size: 4rem; }

.book-info {
  padding: 0.6rem 0.65rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex: 1;
}

.book-title {
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-author {
  font-size: 0.72rem;
  color: #94a3b8;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.book-meta {
  font-size: 0.7rem;
  color: #475569;
}

.book-resume {
  font-size: 0.7rem;
  color: #7c3aed;
  font-weight: 500;
}

/* ===== Continue listening ===== */
.continue-list {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin-bottom: 1.5rem;
}

.continue-list::-webkit-scrollbar { display: none; }

.continue-item {
  flex: 0 0 260px;
  scroll-snap-align: start;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 0.75rem;
  display: flex;
  gap: 0.75rem;
  padding: 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  min-height: 52px;
  position: relative;
}

.continue-item:hover, .continue-item:focus-visible {
  border-color: #7c3aed;
  outline: none;
}

.continue-item:active { background: #1a2540; }

.continue-cover {
  width: 54px;
  height: 80px;
  flex-shrink: 0;
  border-radius: 0.35rem;
  background: #0f172a;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.continue-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.continue-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.continue-title {
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.3;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.continue-author {
  font-size: 0.72rem;
  color: #94a3b8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.continue-pos {
  font-size: 0.72rem;
  color: #7c3aed;
}

.continue-progress-bar {
  height: 3px;
  background: #334155;
  border-radius: 2px;
  margin-top: auto;
}

.continue-progress-fill {
  height: 100%;
  background: #7c3aed;
  border-radius: 2px;
}

/* ===== Card dismiss button ===== */
.card-remove-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.75);
  border: none;
  border-radius: 50%;
  color: #94a3b8;
  font-size: 0.7rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  z-index: 2;
  backdrop-filter: blur(4px);
  line-height: 1;
}

@media (hover: none) {
  .card-remove-btn { opacity: 0.7; }
}

.book-card:hover .card-remove-btn,
.continue-item:hover .card-remove-btn {
  opacity: 0.7;
}

.card-remove-btn:hover,
.card-remove-btn:focus-visible {
  opacity: 1 !important;
  color: #f87171;
  background: rgba(15, 23, 42, 0.92);
  outline: none;
}

.card-remove-btn:active {
  transform: scale(0.88);
}

/* ===== Sticky detail nav ===== */
#detail-sticky-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(10, 15, 30, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid #1e293b;
  padding: calc(0.5rem + env(safe-area-inset-top, 0px)) 0.75rem 0.5rem;
  margin: 0 -1rem;
  padding-left: calc(0.75rem + env(safe-area-inset-left, 0px));
  padding-right: calc(0.75rem + env(safe-area-inset-right, 0px));
}

.detail-nav-back {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: none;
  border: 1px solid #334155;
  border-radius: 0.5rem;
  color: #94a3b8;
  padding: 0 0.75rem;
  height: 44px;
  font-size: 0.85rem;
  white-space: nowrap;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.detail-nav-back:hover { border-color: #7c3aed; color: #e2e8f0; }

.detail-nav-title {
  flex: 1;
  min-width: 0;
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #94a3b8;
}

.detail-nav-chapters {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: #7c3aed;
  border: none;
  border-radius: 0.5rem;
  color: #fff;
  padding: 0 0.8rem;
  height: 44px;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.detail-nav-chapters:hover { background: #6d28d9; }

/* ===== Chapter bottom sheet ===== */
#chapter-sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 1100;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  animation: fade-in 0.2s ease;
}

#chapter-sheet {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1101;
  background: #111827;
  border-radius: 1rem 1rem 0 0;
  border-top: 1px solid #334155;
  display: flex;
  flex-direction: column;
  /* max 70% of screen, min enough for a handful of chapters */
  max-height: 72dvh;
  animation: sheet-up 0.25s cubic-bezier(0.32, 0.72, 0, 1);
  outline: none;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

@keyframes sheet-up {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.chapter-sheet-handle {
  width: 36px;
  height: 4px;
  background: #334155;
  border-radius: 2px;
  margin: 0.65rem auto 0;
  flex-shrink: 0;
}

.chapter-sheet-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem 0.6rem;
  border-bottom: 1px solid #1e293b;
  flex-shrink: 0;
}

.chapter-sheet-title {
  flex: 1;
  min-width: 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: #94a3b8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
}

.chapter-sheet-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1e293b;
  border: none;
  border-radius: 50%;
  color: #94a3b8;
  font-size: 0.85rem;
  cursor: pointer;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.chapter-sheet-close:hover { color: #e2e8f0; background: #334155; }

.chapter-sheet-body {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: 0.5rem 0.75rem 1rem;
  /* hide the .chapters-heading inside the sheet since the header already shows the title */
}

.chapter-sheet-body .chapters-heading {
  display: none;
}

/* Give the detail header some breathing room below the sticky nav */
#book-detail-header {
  padding-top: 1rem;
}

/* ===== Book detail view (legacy back-btn — unused but kept for safety) ===== */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: none;
  border: 1px solid #334155;
  border-radius: 0.5rem;
  color: #94a3b8;
  padding: 0 0.85rem;
  height: 44px;
  font-size: 0.85rem;
  cursor: pointer;
  margin-bottom: 1rem;
  transition: border-color 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.back-btn:hover { border-color: #7c3aed; color: #e2e8f0; }

.detail-header {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.detail-cover {
  width: 110px;
  flex-shrink: 0;
  aspect-ratio: 2 / 3;
  border-radius: 0.5rem;
  background: #1e293b;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-meta { flex: 1; min-width: 0; }

.detail-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.3rem;
}

.detail-author {
  font-size: 0.85rem;
  color: #94a3b8;
  margin-bottom: 0.4rem;
}

.detail-desc {
  font-size: 0.8rem;
  color: #94a3b8;
  line-height: 1.5;
}

/* ===== Chapter list ===== */
.chapters-heading {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #7c3aed;
  margin-bottom: 0.5rem;
}

.chapter-items {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-bottom: 2rem;
}

.chapter-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  /* 52px min touch target */
  min-height: 52px;
  padding: 0.6rem 0.85rem;
  border-radius: 0.5rem;
  background: #1e293b;
  border: 1px solid transparent;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.chapter-item:hover, .chapter-item:focus-visible {
  border-color: #7c3aed;
  outline: none;
}

.chapter-item:active { background: #1a2540; }

.chapter-item.active {
  background: #2d1b69;
  border-color: #7c3aed;
}

.chapter-number {
  font-size: 0.75rem;
  color: #475569;
  min-width: 1.8rem;
  text-align: right;
  flex-shrink: 0;
}

.chapter-item.active .chapter-number { color: #a78bfa; }

.chapter-name {
  flex: 1;
  font-size: 0.88rem;
  line-height: 1.35;
}

.chapter-duration {
  font-size: 0.75rem;
  color: #475569;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ===== Loading / empty states ===== */
.grid-loading {
  grid-column: 1 / -1;
  text-align: center;
  color: #475569;
  padding: 2rem 0;
  font-size: 0.9rem;
}

.empty-message {
  color: #475569;
  font-size: 0.9rem;
  padding: 1.5rem 0;
}

/* ===== Loading overlay ===== */
#loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}

#loading-overlay.hidden { display: none; }

.spinner {
  width: 2.5rem;
  height: 2.5rem;
  border: 3px solid #334155;
  border-top-color: #7c3aed;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Player bar ===== */
#player-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 15, 30, 0.97);
  border-top: 1px solid #1e293b;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.5rem 1rem calc(0.6rem + env(safe-area-inset-bottom, 0px));
}

#player-bar.hidden { display: none; }

.player-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

/* Book title + chapter line */
.player-info {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  min-width: 0;
}

#player-title {
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #e2e8f0;
}

#player-chapter {
  font-size: 0.7rem;
  color: #94a3b8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Seek bar row */
.seek-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  /* expand the touch area vertically */
  padding: 0.25rem 0;
}

/* Seek bar: thin track but large invisible touch area via wrapper */
#seek-bar {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: #334155;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  touch-action: none;
  /* expand invisible touch area */
  padding: 12px 0;
  margin: -12px 0;
  background-clip: content-box;
}

#seek-bar::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #7c3aed;
  cursor: pointer;
  transition: transform 0.1s;
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.2);
}

#seek-bar:active::-webkit-slider-thumb {
  transform: scale(1.25);
  box-shadow: 0 0 0 6px rgba(124, 58, 237, 0.3);
}

#seek-bar::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 50%;
  background: #7c3aed;
  cursor: pointer;
}

#time-display {
  font-size: 0.7rem;
  color: #64748b;
  white-space: nowrap;
  min-width: 88px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Controls row */
.player-controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.ctrl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 50%;
  color: #e2e8f0;
  transition: background 0.15s, transform 0.1s;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.ctrl-btn:active { transform: scale(0.90); }

.ctrl-btn-sm {
  /* 48px target */
  width: 48px;
  height: 48px;
  font-size: 1.3rem;
  color: #94a3b8;
}

.ctrl-btn-sm:hover { background: rgba(30, 41, 59, 0.8); color: #e2e8f0; }

#btn-play-pause {
  /* 60px prominent play button */
  width: 60px;
  height: 60px;
  font-size: 1.6rem;
  background: #7c3aed;
  color: #fff;
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.2);
}

#btn-play-pause:hover { background: #6d28d9; }
#btn-play-pause:active { transform: scale(0.92); box-shadow: none; }

#speed-select {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 0.5rem;
  color: #94a3b8;
  font-size: 0.78rem;
  font-weight: 600;
  /* 44px touch target */
  height: 44px;
  padding: 0 0.6rem;
  cursor: pointer;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  min-width: 60px;
  text-align: center;
}

#speed-select:focus { border-color: #7c3aed; }

/* ===== Toast ===== */
#toast-stack {
  position: fixed;
  bottom: calc(140px + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  pointer-events: none;
  width: max-content;
  max-width: calc(100vw - 2rem);
}

.toast {
  background: rgba(30, 41, 59, 0.97);
  border: 1px solid #334155;
  color: #e2e8f0;
  padding: 0.65rem 1.1rem;
  border-radius: 0.65rem;
  font-size: 0.88rem;
  text-align: center;
  animation: toast-in 0.2s ease;
  backdrop-filter: blur(10px);
}

.toast-success { border-color: #22c55e; color: #86efac; }
.toast-error { border-color: #ef4444; color: #fca5a5; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}