/* Pustakalay Core Layout & Component Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
  height: 100vh;
  width: 100vw;
}

/* App Container Layout */
#app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  position: relative;
}

/* Sidebar Navigation (Desktop / Tablet) */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  color: #94A3B8;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem 1rem;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  z-index: 50;
  transition: var(--transition-normal);
}

.brand-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0.5rem 1.5rem 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--brand-primary), #F59E0B);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  font-size: 1.3rem;
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.35);
}

.brand-text h1 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFF;
  letter-spacing: 0.5px;
  line-height: 1.1;
}

.brand-text span {
  font-size: 0.72rem;
  color: #94A3B8;
  letter-spacing: 0.2px;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 1.5rem;
}

.nav-item button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius-md);
  background: transparent;
  border: none;
  color: #94A3B8;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: left;
}

.nav-item button i {
  font-size: 1.15rem;
  width: 22px;
  text-align: center;
}

.nav-item button:hover {
  background-color: var(--bg-sidebar-hover);
  color: #F1F5F9;
}

.nav-item.active button {
  background-color: var(--brand-primary);
  color: #FFFFFF;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
}

.sidebar-add-btn {
  margin-top: auto;
  margin-bottom: 1rem;
  width: 100%;
  padding: 0.85rem;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, var(--brand-primary), #B45309);
  color: #FFF;
  border: none;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition-fast);
}

.sidebar-add-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.sidebar-footer {
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* Main Content Workspace */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-main);
}

/* Top App Header */
.app-header {
  height: 68px;
  background-color: var(--bg-surface-translucent);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  z-index: 40;
}

.header-search {
  position: relative;
  width: 380px;
  max-width: 100%;
}

.header-search i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.05rem;
}

.header-search input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.75rem;
  border-radius: var(--border-radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition-fast);
}

.header-search input:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
  background-color: var(--bg-surface);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 1.1rem;
}

.icon-btn:hover {
  background-color: var(--border-color-subtle);
  color: var(--text-primary);
}

.user-profile-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0.85rem 0.35rem 0.4rem;
  border-radius: var(--border-radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  cursor: pointer;
  transition: var(--transition-fast);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366F1, #A855F7);
  color: #FFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.user-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Page View Content Container */
.content-area {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
  position: relative;
}

.view-section {
  display: none;
  animation: fadeIn 0.3s ease;
}

.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section Titles & Headers */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.section-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

/* Greeting Header */
.greeting-header {
  margin-bottom: 2rem;
}

.greeting-text {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
}

.greeting-sub {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Continue Reading Hero Card */
.continue-card {
  background: linear-gradient(135deg, #1E293B, #0F172A);
  color: #FFFFFF;
  border-radius: var(--border-radius-xl);
  padding: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.continue-card::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.25) 0%, rgba(0,0,0,0) 70%);
  pointer-events: none;
}

.continue-info {
  flex: 1;
  z-index: 2;
}

.continue-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: rgba(217, 119, 6, 0.2);
  color: #FBBF24;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 0.3rem 0.75rem;
  border-radius: var(--border-radius-full);
  margin-bottom: 0.85rem;
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.continue-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
  color: #FFFFFF;
}

.continue-meta {
  font-size: 0.9rem;
  color: #94A3B8;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.progress-bar-wrap {
  width: 100%;
  max-width: 360px;
  height: 8px;
  background-color: rgba(255, 255, 255, 0.12);
  border-radius: var(--border-radius-full);
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--brand-primary), #F59E0B);
  border-radius: var(--border-radius-full);
  transition: width 0.4s ease;
}

.continue-btn {
  padding: 0.75rem 1.6rem;
  border-radius: var(--border-radius-full);
  background: linear-gradient(135deg, var(--brand-primary), #B45309);
  color: #FFF;
  border: none;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.4);
  transition: var(--transition-fast);
}

.continue-btn:hover {
  transform: scale(1.03);
}

.continue-cover {
  width: 110px;
  height: 145px;
  border-radius: var(--border-radius-md);
  object-fit: cover;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  border: 2px solid rgba(255, 255, 255, 0.15);
  z-index: 2;
  background-color: #334155;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94A3B8;
  font-size: 2rem;
}

/* Quick Library Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.stat-icon.all { background-color: #EEF2FF; color: #6366F1; }
.stat-icon.recent-add { background-color: #ECFDF5; color: #10B981; }
.stat-icon.recent-read { background-color: #FEF3C7; color: #D97706; }
.stat-icon.fav { background-color: #FEE2E2; color: #EF4444; }
.stat-icon.progress { background-color: #E0F2FE; color: #0284C7; }
.stat-icon.done { background-color: #F3E8FF; color: #9333EA; }

.stat-num {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

/* Section Grid Controls & Filters */
.controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-pills {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.filter-pill {
  padding: 0.45rem 1rem;
  border-radius: var(--border-radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.filter-pill:hover {
  background-color: var(--border-color-subtle);
  color: var(--text-primary);
}

.filter-pill.active {
  background-color: var(--brand-primary);
  color: #FFFFFF;
  border-color: var(--brand-primary);
  box-shadow: 0 2px 8px rgba(217, 119, 6, 0.25);
}

.view-sort-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.select-dropdown {
  padding: 0.5rem 0.85rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

.view-toggle {
  display: flex;
  align-items: center;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 0.15rem;
}

.toggle-btn {
  padding: 0.4rem 0.65rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition-fast);
}

.toggle-btn.active {
  background-color: var(--border-color);
  color: var(--text-primary);
}

/* PDF Card Grid Layout */
.pdf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}

.pdf-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

/* PDF Card Styling (Grid View) */
.pdf-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
  position: relative;
  cursor: pointer;
}

.pdf-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-primary);
}

.pdf-thumbnail-wrap {
  width: 100%;
  height: 220px;
  background-color: #1E293B;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.pdf-thumbnail-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: #64748B;
}

.pdf-thumbnail-placeholder i {
  font-size: 3rem;
  color: var(--brand-primary);
}

.fav-badge-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
  z-index: 5;
}

.fav-badge-btn.is-fav i {
  color: #EF4444;
}

.pdf-card-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.pdf-card-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.3;
}

.pdf-card-author {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.pdf-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.badge-tag {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--border-radius-sm);
  background-color: var(--brand-accent-light);
  color: var(--brand-accent);
  font-weight: 600;
}

.badge-collection {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--border-radius-sm);
  background-color: var(--brand-primary-light);
  color: var(--brand-primary);
  font-weight: 600;
}

.pdf-card-footer {
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-color-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.mini-progress {
  height: 4px;
  background-color: var(--border-color);
  border-radius: var(--border-radius-full);
  overflow: hidden;
  width: 100%;
  margin-top: 0.5rem;
}

.mini-progress-fill {
  height: 100%;
  background-color: var(--brand-primary);
  border-radius: var(--border-radius-full);
}

/* PDF List Item Styling (List View) */
.pdf-list-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  transition: var(--transition-fast);
  cursor: pointer;
}

.pdf-list-item:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-sm);
  background-color: var(--bg-surface-elevated);
}

.pdf-list-thumb {
  width: 44px;
  height: 58px;
  border-radius: var(--border-radius-sm);
  object-fit: cover;
  background-color: #1E293B;
  flex-shrink: 0;
}

.pdf-list-main {
  flex: 1;
  min-width: 0;
}

.pdf-list-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pdf-list-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.2rem;
}

/* Collections Cards Grid */
.collections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.collection-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
}

.collection-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-primary);
}

.collection-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.collection-icon-wrap {
  width: 50px;
  height: 50px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  background-color: var(--brand-primary-light);
}

.collection-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.collection-card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.collection-card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Empty States */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
}

.empty-icon {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background-color: var(--brand-primary-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.8rem;
  margin-bottom: 1.5rem;
}

.empty-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.empty-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 400px;
  margin-bottom: 1.5rem;
}

.btn-primary {
  padding: 0.7rem 1.5rem;
  border-radius: var(--border-radius-full);
  background: linear-gradient(135deg, var(--brand-primary), #B45309);
  color: #FFF;
  border: none;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  padding: 0.7rem 1.4rem;
  border-radius: var(--border-radius-full);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
}

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

/* Mobile Bottom Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background-color: var(--bg-surface-translucent);
  backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--border-color);
  z-index: 90;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 500;
  cursor: pointer;
}

.mobile-nav-item i {
  font-size: 1.3rem;
}

.mobile-nav-item.active {
  color: var(--brand-primary);
  font-weight: 700;
}

/* Floating Action Button (FAB) */
.fab-add {
  display: none;
  position: fixed;
  bottom: 80px;
  right: 1.5rem;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), #B45309);
  color: #FFF;
  border: none;
  box-shadow: 0 8px 24px rgba(217, 119, 6, 0.4);
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 95;
  transition: var(--transition-fast);
}

.fab-add:hover {
  transform: scale(1.08);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 999;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background-color: var(--bg-sidebar);
  color: #FFF;
  padding: 0.85rem 1.25rem;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  animation: slideInRight 0.3s ease;
  border-left: 4px solid var(--brand-primary);
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Responsive Styles */
@media (max-width: 900px) {
  .sidebar {
    display: none;
  }

  .mobile-nav {
    display: flex;
  }

  .fab-add {
    display: flex;
  }

  .content-area {
    padding: 1.25rem;
    padding-bottom: 90px;
  }

  .app-header {
    padding: 0 1.25rem;
  }

  .header-search {
    width: 220px;
  }

  .continue-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .continue-cover {
    display: none;
  }
}

/* Shelf & Collection Item Removal Buttons */
.shelf-remove-card-btn {
  background: rgba(239, 68, 68, 0.1);
  color: #EF4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--border-radius-sm);
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: var(--transition-fast);
}

.shelf-remove-card-btn:hover {
  background: #EF4444;
  color: #FFFFFF;
}

.badge-collection .remove-col-tag-btn {
  margin-left: 0.35rem;
  cursor: pointer;
  font-weight: bold;
  opacity: 0.7;
  display: inline-flex;
  align-items: center;
}

.badge-collection .remove-col-tag-btn:hover {
  opacity: 1;
  color: #EF4444;
}