/* CSS Variables */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --bg: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border: #e5e7eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --sidebar-width: 260px;
  --reading-pane-width: 500px;
}

/* Dark Mode */
[data-theme="dark"] {
  --primary: #818cf8;
  --primary-dark: #6366f1;
  --primary-light: #a5b4fc;
  --bg: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  --text: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --border: #374151;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.4);
}

[data-theme="dark"] .save-card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .kindle-book-card,
[data-theme="dark"] .modal-content {
  background: var(--bg-secondary);
}

[data-theme="dark"] .nav-item.active {
  background: var(--bg-tertiary);
}

[data-theme="dark"] .auth-container {
  background: var(--bg-secondary);
}

[data-theme="dark"] .view-controls select {
  background: var(--bg-secondary);
  color: var(--text);
}

[data-theme="dark"] .save-card-highlight {
  background: rgba(245, 158, 11, 0.2);
}

[data-theme="dark"] .kindle-highlight-snippet {
  background: rgba(245, 158, 11, 0.15);
}

[data-theme="dark"] .kindle-stats {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(251, 191, 36, 0.15) 100%);
}

[data-theme="dark"] .reading-pane {
  background: var(--bg);
}

/* Dark mode toggle button */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  width: 100%;
  margin-bottom: 8px;
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text);
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input, select {
  font-family: inherit;
  font-size: inherit;
}

.hidden {
  display: none !important;
}

/* Screens */
.screen {
  min-height: 100vh;
}

/* Auth Screen */
#auth-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.auth-container {
  background: white;
  padding: 48px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
}

.logo {
  text-align: center;
  margin-bottom: 32px;
}

.logo-icon {
  width: 64px;
  height: 64px;
  background: var(--primary);
  color: white;
  font-size: 32px;
  font-weight: 700;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.logo h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}

.logo p {
  color: var(--text-secondary);
  margin-top: 4px;
}

#auth-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

#auth-form input {
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  transition: border-color 0.15s;
}

#auth-form input:focus {
  outline: none;
  border-color: var(--primary);
}

.error {
  color: var(--danger);
  font-size: 14px;
  margin-top: 12px;
  text-align: center;
}

.message {
  color: var(--success);
  font-size: 14px;
  margin-top: 12px;
  text-align: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.15s;
}

.btn.primary {
  background: var(--primary);
  color: white;
}

.btn.primary:hover {
  background: var(--primary-dark);
}

.btn.secondary {
  background: var(--bg-tertiary);
  color: var(--text);
}

.btn.secondary:hover {
  background: var(--border);
}

.btn.icon {
  padding: 8px;
  background: transparent;
  color: var(--text-secondary);
}

.btn.icon:hover {
  background: var(--bg-tertiary);
  color: var(--text);
}

/* Main Screen Layout */
#main-screen {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.logo-small {
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: white;
  font-size: 16px;
  font-weight: 700;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-header span {
  font-size: 18px;
  font-weight: 600;
}

/* Navigation */
.nav {
  padding: 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  transition: all 0.15s;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-size: 14px;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text);
}

.nav-item.active {
  background: white;
  color: var(--primary);
  box-shadow: var(--shadow);
}

.nav-section {
  padding: 16px;
  border-top: 1px solid var(--border);
}

.nav-section h3 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.add-folder-btn {
  display: block;
  width: 100%;
  padding: 8px;
  background: none;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 8px;
  transition: all 0.15s;
}

.add-folder-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: var(--bg-tertiary);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.tag:hover {
  background: var(--primary);
  color: white;
}

.sidebar-footer {
  margin-top: auto;
  padding: 12px;
  border-top: 1px solid var(--border);
}

/* Main Content */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.main-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

.search-container {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  max-width: 500px;
}

.search-container svg {
  color: var(--text-muted);
  flex-shrink: 0;
}

.search-container input {
  flex: 1;
  border: none;
  background: none;
  font-size: 15px;
  color: var(--text);
}

.search-container input:focus {
  outline: none;
}

.search-container input::placeholder {
  color: var(--text-muted);
}

#mobile-menu-btn {
  display: none;
}

/* Content Area */
.content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.content-header h2 {
  font-size: 24px;
  font-weight: 600;
}

.view-controls select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: white;
  font-size: 14px;
  color: var(--text-secondary);
}

/* Saves Grid */
.saves-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.save-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.15s;
}

.save-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.save-card.highlight {
  border-left: 4px solid var(--warning);
}

.save-card-image {
  width: 100%;
  height: 140px;
  background: var(--bg-tertiary);
  object-fit: cover;
}

.save-card-content {
  padding: 16px;
}

.save-card-site {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.save-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.save-card-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.save-card-highlight {
  font-size: 15px;
  color: var(--text);
  font-style: italic;
  background: #fef3c7;
  padding: 12px;
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.save-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.save-card-date {
  font-size: 12px;
  color: var(--text-muted);
}

.save-card-tags {
  display: flex;
  gap: 4px;
}

/* Loading & Empty States */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.empty-state {
  text-align: center;
  padding: 64px 24px;
}

.empty-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--text-secondary);
}

/* Reading Pane */
.reading-pane {
  width: var(--reading-pane-width);
  background: white;
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.reading-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.reading-actions {
  display: flex;
  gap: 4px;
}

.reading-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.reading-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* Audio Player */
.audio-player {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
}

[data-theme="dark"] .audio-player {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(34, 197, 94, 0.1) 100%);
}

.audio-play-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s;
}

.audio-play-btn:hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

.audio-play-btn svg.hidden {
  display: none;
}

.audio-progress-container {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
}

.audio-progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 3px;
  cursor: pointer;
  position: relative;
}

.audio-progress {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  width: 0%;
  transition: width 0.1s linear;
}

.audio-time {
  font-size: 12px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
  min-width: 36px;
}

.audio-speed {
  padding: 4px 8px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius);
  background: white;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
}

.audio-generating {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  font-size: 14px;
  color: #92400e;
}

[data-theme="dark"] .audio-generating {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(251, 191, 36, 0.15) 100%);
  color: #fcd34d;
}

.audio-generating-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid #fcd34d;
  border-top-color: #d97706;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@media (max-width: 768px) {
  .audio-player {
    padding: 10px 12px;
    gap: 10px;
  }

  .audio-play-btn {
    width: 40px;
    height: 40px;
  }

  .audio-time {
    font-size: 11px;
    min-width: 32px;
  }

  .audio-speed {
    padding: 3px 6px;
    font-size: 11px;
  }
}

#reading-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
}

.reading-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.reading-body p {
  margin-bottom: 16px;
}

.reading-body a {
  color: var(--primary);
  text-decoration: underline;
}

.reading-body a:hover {
  color: var(--primary-dark);
}

.reading-body strong {
  font-weight: 600;
}

.reading-body em {
  font-style: italic;
}

.reading-body code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 14px;
}

.reading-body pre {
  background: var(--bg-tertiary);
  padding: 16px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 16px 0;
}

.reading-body pre code {
  background: none;
  padding: 0;
}

.reading-body blockquote {
  border-left: 4px solid var(--primary);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--text-secondary);
  font-style: italic;
}

.reading-body ul, .reading-body ol {
  margin: 16px 0;
  padding-left: 24px;
}

.reading-body li {
  margin-bottom: 8px;
}

.reading-body h1, .reading-body h2, .reading-body h3,
.reading-body h4, .reading-body h5, .reading-body h6 {
  font-weight: 600;
  margin: 24px 0 12px;
  line-height: 1.3;
}

.reading-body h1 { font-size: 24px; }
.reading-body h2 { font-size: 20px; }
.reading-body h3 { font-size: 18px; }

.reading-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 16px 0;
}

.save-card {
  position: relative;
}

.reading-tags {
  padding: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.add-tag-btn {
  padding: 4px 12px;
  background: none;
  border: 1px dashed var(--border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-muted);
}

.add-tag-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Mobile Responsive */
@media (max-width: 1024px) {
  .reading-pane {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
  }
}

@media (max-width: 768px) {
  /* Prevent text size adjustment on rotation */
  html {
    -webkit-text-size-adjust: 100%;
  }

  /* Safe area for iPhone notch */
  body {
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  }

  .sidebar {
    position: fixed;
    left: -100%;
    top: 0;
    bottom: 0;
    z-index: 200;
    transition: left 0.3s;
    width: 85%;
    max-width: 320px;
  }

  .sidebar.open {
    left: 0;
  }

  /* Overlay when sidebar is open */
  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 199;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
  }

  .sidebar-overlay.open {
    opacity: 1;
    visibility: visible;
  }

  #mobile-menu-btn {
    display: flex;
  }

  .main-header {
    padding: 12px 16px;
  }

  .search-container {
    padding: 8px 12px;
  }

  .content {
    padding: 16px;
  }

  .content-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
  }

  .content-header h2 {
    font-size: 20px;
  }

  .saves-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .save-card-image {
    height: 120px;
  }

  .save-card-content {
    padding: 12px;
  }

  .save-card-title {
    font-size: 15px;
  }

  /* Full screen reading pane on mobile */
  .reading-pane {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    width: 100%;
    z-index: 300;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .reading-pane.open {
    transform: translateX(0);
  }

  .reading-pane.hidden {
    display: flex !important;
    transform: translateX(100%);
  }

  .reading-header {
    padding: 12px 16px;
    padding-top: calc(12px + env(safe-area-inset-top));
  }

  .reading-content {
    padding: 16px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
  }

  #reading-title {
    font-size: 22px;
    margin-bottom: 16px;
  }

  .reading-body {
    font-size: 17px;
    line-height: 1.7;
  }

  /* Larger touch targets */
  .btn.icon {
    padding: 12px;
    min-width: 44px;
    min-height: 44px;
  }

  .nav-item {
    padding: 14px 12px;
  }

  /* Auth screen mobile */
  .auth-container {
    padding: 32px 24px;
    margin: 16px;
  }

  .logo-icon {
    width: 56px;
    height: 56px;
    font-size: 28px;
  }

  .logo h1 {
    font-size: 24px;
  }
}

/* Extra small screens */
@media (max-width: 380px) {
  .content {
    padding: 12px;
  }

  .save-card-content {
    padding: 10px;
  }

  .reading-content {
    padding: 12px;
  }

  #reading-title {
    font-size: 20px;
  }
}

/* Stats Screen */
.stats-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 48px 24px;
}

.stats-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.stats-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.stat-card-value {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
}

.stat-card-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.stats-section {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.stats-section h3 {
  font-size: 18px;
  margin-bottom: 16px;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.modal-content {
  position: relative;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: modalIn 0.2s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

/* Digest Settings Modal */
.digest-modal-content {
  max-width: 420px;
}

.digest-description {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
  line-height: 1.5;
}

.digest-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.digest-form .form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.digest-form label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.digest-form input[type="email"] {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
}

.digest-form input[type="email"]:focus {
  outline: none;
  border-color: var(--primary);
}

.digest-form select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
}

.schedule-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.schedule-row span {
  color: var(--text-secondary);
  font-size: 14px;
}

.timezone-hint {
  font-size: 12px !important;
  color: var(--text-muted) !important;
}

/* Toggle Switch */
.toggle-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-weight: normal !important;
}

.toggle-label input {
  display: none;
}

.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  transition: background 0.2s;
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle-label input:checked + .toggle-switch {
  background: var(--primary);
}

.toggle-label input:checked + .toggle-switch::after {
  transform: translateX(20px);
}

.digest-status {
  padding: 12px;
  border-radius: var(--radius);
  font-size: 13px;
  text-align: center;
}

.digest-status.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.digest-status.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* Digest settings button in nav */
.digest-settings-btn {
  margin-left: 26px;
  font-size: 12px;
  opacity: 0.7;
  border: none;
  background: none;
}

.digest-settings-btn:hover {
  opacity: 1;
}

#digest-options,
#digest-schedule-group {
  transition: opacity 0.2s;
}

#digest-options.disabled,
#digest-schedule-group.disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
}

.dropzone.dragover {
  border-style: solid;
}

.dropzone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.dropzone-content svg {
  color: var(--text-muted);
}

.dropzone-content p {
  color: var(--text);
  font-size: 15px;
}

.dropzone-hint {
  font-size: 13px;
  color: var(--text-muted);
}

.import-help {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

.import-help code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 12px;
}

/* Import Preview */
.import-preview {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.import-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
}

.import-stat {
  text-align: center;
}

.import-stat-value {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
}

.import-stat-label {
  font-size: 13px;
  color: var(--text-muted);
}

.import-books-list {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.import-book-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.import-book-item:last-child {
  border-bottom: none;
}

.import-book-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.import-book-author {
  font-size: 12px;
  color: var(--text-muted);
}

.import-book-count {
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  padding: 4px 10px;
  border-radius: 20px;
}

/* Import success state */
.dropzone.success {
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.05);
}

.dropzone.success svg {
  color: var(--success);
}

/* Processing state */
.dropzone.processing {
  pointer-events: none;
  opacity: 0.7;
}

/* Kindle View Styles */
.kindle-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 24px;
  padding: 20px;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-radius: var(--radius-lg);
}

.kindle-clear-btn {
  margin-left: auto;
  background: white;
  border: 1px solid #d97706;
  color: #92400e;
  font-size: 13px;
  padding: 8px 16px;
}

.kindle-clear-btn:hover {
  background: #fef3c7;
}

.kindle-stat {
  text-align: center;
}

.kindle-stat-value {
  display: block;
  font-size: 32px;
  font-weight: 700;
  color: #92400e;
}

.kindle-stat-label {
  font-size: 13px;
  color: #a16207;
}

.kindle-books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 16px;
}

.kindle-book-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  cursor: pointer;
  transition: all 0.15s;
}

.kindle-book-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.kindle-book-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.kindle-book-icon {
  font-size: 28px;
  flex-shrink: 0;
}

.kindle-book-icon-large {
  font-size: 48px;
  flex-shrink: 0;
}

.kindle-book-info {
  flex: 1;
  min-width: 0;
}

.kindle-book-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kindle-book-author {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
}

.kindle-book-count {
  background: var(--bg-tertiary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.kindle-highlights-preview {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kindle-highlight-snippet {
  font-size: 13px;
  color: var(--text-secondary);
  font-style: italic;
  padding: 10px 12px;
  background: #fffbeb;
  border-radius: var(--radius);
  border-left: 3px solid #f59e0b;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: background 0.15s;
}

.kindle-highlight-snippet:hover {
  background: #fef3c7;
}

.kindle-more-highlights {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 8px;
}

/* Book Detail View */
.kindle-book-detail {
  max-width: 800px;
}

.kindle-back-btn {
  margin-bottom: 24px;
}

.kindle-book-detail-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.kindle-book-detail-header h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 0 0 4px;
}

.kindle-book-meta {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}

.kindle-highlights-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.kindle-highlight-card {
  background: white;
  border: 1px solid var(--border);
  border-left: 4px solid #f59e0b;
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all 0.15s;
}

.kindle-highlight-card:hover {
  box-shadow: var(--shadow);
  background: #fffbeb;
}

.kindle-highlight-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  font-style: italic;
}

.kindle-highlight-meta {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .kindle-stats {
    gap: 24px;
    padding: 16px;
  }

  .kindle-stat-value {
    font-size: 24px;
  }

  .kindle-books-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .kindle-book-card {
    padding: 16px;
  }

  .kindle-book-icon {
    font-size: 24px;
  }

  .kindle-book-title {
    font-size: 15px;
  }

  .kindle-book-detail-header {
    gap: 12px;
  }

  .kindle-book-icon-large {
    font-size: 36px;
  }

  .kindle-book-detail-header h2 {
    font-size: 20px;
  }

  .kindle-highlight-card {
    padding: 16px;
  }
}

@media (max-width: 768px) {
  .modal {
    padding: 16px;
  }

  .modal-content {
    max-height: 85vh;
  }

  .modal-header {
    padding: 16px;
  }

  .modal-body {
    padding: 16px;
  }

  .dropzone {
    padding: 32px 16px;
  }

  .import-stats {
    gap: 16px;
  }

  .import-stat-value {
    font-size: 24px;
  }
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border);
  z-index: 10;
}

.reading-progress-fill {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.1s linear;
}

/* Credits */
.credits {
  padding: 12px 16px;
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}

.credits a {
  color: var(--text-secondary);
  text-decoration: underline;
}

.credits a:hover {
  color: var(--primary);
}

/* Weekly Digest Badge */
.digest-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
}

/* Digest Settings Modal */
.digest-settings {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
}

.digest-settings label {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background 0.15s;
}

.digest-settings label:hover {
  background: var(--bg-tertiary);
}

.digest-settings input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.digest-email-input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  margin-top: 12px;
}

.digest-email-input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Weekly Review */
.weekly-review {
  max-width: 900px;
}

.weekly-header {
  margin-bottom: 32px;
}

.weekly-header h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 4px;
}

.weekly-dates {
  color: var(--text-muted);
  font-size: 15px;
}

.weekly-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.weekly-stat {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 24px;
  border-radius: var(--radius-lg);
  text-align: center;
}

.weekly-stat-value {
  display: block;
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 4px;
}

.weekly-stat-label {
  font-size: 13px;
  opacity: 0.9;
}

.weekly-section {
  margin-bottom: 24px;
}

.weekly-section h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.weekly-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.weekly-source {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}

.weekly-rediscovery-hint {
  color: var(--text-muted);
  font-style: italic;
}

.rediscovery-card {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  padding: 20px;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.15s;
}

[data-theme="dark"] .rediscovery-card {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(251, 191, 36, 0.15) 100%);
}

.rediscovery-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.rediscovery-meta {
  font-size: 12px;
  color: #92400e;
  margin-bottom: 8px;
}

[data-theme="dark"] .rediscovery-meta {
  color: #fcd34d;
}

.rediscovery-title {
  font-size: 18px;
  font-weight: 600;
  color: #78350f;
  margin-bottom: 8px;
}

[data-theme="dark"] .rediscovery-title {
  color: #fef3c7;
}

.rediscovery-highlight {
  font-style: italic;
  color: #92400e;
  margin-bottom: 8px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius);
}

[data-theme="dark"] .rediscovery-highlight {
  color: #fde68a;
  background: rgba(0, 0, 0, 0.2);
}

.rediscovery-source {
  font-size: 13px;
  color: #a16207;
}

[data-theme="dark"] .rediscovery-source {
  color: #fcd34d;
}

@media (max-width: 768px) {
  .weekly-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .weekly-stat {
    padding: 16px;
  }

  .weekly-stat-value {
    font-size: 28px;
  }

  .weekly-header h3 {
    font-size: 24px;
  }
}