/* ===================================
   PAST PAPERS - REDESIGNED
   Clean, spacious file-manager style
   =================================== */
:root {
  /* Primary Colors */
  --primary-color: #e81123;
  --primary-shade: #e76e6e;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;

  /* Secondary Colors */
  --secondary-color: #10b981;
  --secondary-dark: #059669;
  --secondary-light: #d1fae5;

  /* Neutral Colors */
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --text-muted: #9ca3af;
  --background: #ffffff;
  --background-alt: #f9fafb;
  --background-dark: #f3f4f6;

  /* Accent Colors */
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;

  /* Border & Shadow */
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.85rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Typography */
  --font-family: "Lexend", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
}

/* ===================================
   COMPACT MODE LAYOUT (Subject Pages)
   =================================== */
.papers-compact-layout {
  padding: var(--spacing-lg) 0;
}

.papers-quick-filters {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.quick-filter-group {
  display: flex;
  gap: var(--spacing-sm);
  flex: 1;
}

.quick-filter-select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--background);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  color: var(--text-dark);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 120px;
}

.quick-filter-select:hover {
  border-color: var(--primary-color);
}

.quick-filter-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(232, 17, 35, 0.1);
}

.quick-search-group {
  flex: 1;
  max-width: 400px;
}

.quick-search-wrapper {
  position: relative;
  width: 100%;
}

.quick-search-wrapper i {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.quick-search-wrapper input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 2.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  background: var(--background);
  transition: all var(--transition-fast);
}

.quick-search-wrapper input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(232, 17, 35, 0.1);
}

/* ===================================
   FULL MODE LAYOUT (Dedicated Page)
   =================================== */

.papers-full-layout {
  min-height: 80vh;
}

.papers-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-xl) 0;
  /* margin-bottom: var(--spacing-xl); */
  border-bottom: 2px solid var(--border-color);
}

.papers-info h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.papers-count {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.top-bar-actions {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.search-wrapper {
  position: relative;
  width: 350px;
}

.search-wrapper i {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-wrapper input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 2.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  background: var(--background);
  transition: all var(--transition-fast);
}

.search-wrapper input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(232, 17, 35, 0.1);
}

.view-controls {
  display: flex;
  gap: 4px;
  background: var(--background-alt);
  padding: 4px;
  border-radius: var(--radius-md);
}

.view-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-base);
}

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

.view-btn.active {
  background: var(--background);
  color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

/* Main Area Layout */
.papers-main-area {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-xl);
  background: var(--background);
  padding: 1.3rem;
}

/* ===================================
   FILTERS SIDEBAR
   =================================== */
.papers-filters-sidebar {
  position: sticky;
  top: var(--spacing-lg);
  align-self: start;
  background: var(--background);
  /* border-radius: var(--radius-lg); */
  border-right: 2px solid var(--border-color);
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.filters-content {
  padding: var(--spacing-lg);
}

.filters-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-color);
}

.filters-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.filters-header i {
  color: var(--primary-color);
}

.btn-clear {
  background: none;
  border: none;
  color: var(--primary-color);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-fast);
}

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

.filter-group {
  margin-bottom: var(--spacing-lg);
}

.filter-group h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
  user-select: none;
}

.filter-option:hover {
  background: var(--background-alt);
}

.filter-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--primary-color);
}

.filter-option span {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--text-dark);
}

.filter-option .count {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  background: var(--background-alt);
  padding: 2px 6px;
  border-radius: 8px;
  min-width: 24px;
  text-align: center;
}

/* ===================================
   PAPERS DISPLAY AREA
   =================================== */
.papers-display-area {
  flex: 1;
}

.papers-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--text-light);
}

.breadcrumb i.fa-house {
  color: var(--primary-color);
}

.breadcrumb i.fa-chevron-right {
  font-size: 10px;
}

.sort-select {
  padding: var(--spacing-xs) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--background);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  color: var(--text-dark);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sort-select:hover,
.sort-select:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* ===================================
   FILE GRID - Clean & Spacious
   =================================== */
.papers-file-grid {
  display: grid;
  gap: var(--spacing-lg);
  padding: var(--spacing-md) 0;
}

/* Grid density variations */
.papers-file-grid.compact {
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--spacing-md);
}

.papers-file-grid.comfortable {
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--spacing-lg);
}

.papers-file-grid.spacious {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-xl);
}

/* ===================================
   FILE CARD - Inspired by references
   =================================== */
.file-card {
  background: var(--background);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  position: relative;
}

.file-card:hover {
  border-color: var(--primary-light);
  background: var(--background-alt);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.file-card.unavailable {
  opacity: 0.5;
  cursor: not-allowed;
}

.file-card.unavailable:hover {
  transform: none;
  box-shadow: none;
  border-color: transparent;
}

/* File Icon */
.file-icon-wrapper {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
}

.file-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  transition: all var(--transition-base);
  /* All PDFs use primary red color */
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  color: var(--primary-color);
}

.file-icon.theory,
.file-icon.practical {
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  color: var(--primary-color);
}

.file-card:hover .file-icon {
  transform: scale(1.05);
}

/* Compact density - smaller icons */
.papers-file-grid.compact .file-icon {
  width: 60px;
  height: 60px;
  font-size: 2rem;
}

/* Spacious density - larger icons */
.papers-file-grid.spacious .file-icon {
  width: 100px;
  height: 100px;
  font-size: 3rem;
}

/* Solution Indicator */
.solution-indicator {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  box-shadow: var(--shadow-md);
}

/* File Info */
.file-info {
  text-align: center;
  width: 100%;
}

.file-name {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-meta {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.separator {
  color: var(--text-muted);
}

/* File Actions */
.file-actions {
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.file-card:hover .file-actions {
  opacity: 1;
}

.btn-more {
  background: var(--background-alt);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-dark);
  transition: all var(--transition-fast);
}

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

/* ===================================
   OPTIONS MENU (3-dot menu)
   =================================== */
.options-menu {
  background: var(--background);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  border: 2px solid var(--border-color);
  padding: var(--spacing-xs);
  z-index: 1000;
  min-width: 200px;
}

.options-menu button {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  background: transparent;
  text-align: left;
  font-size: var(--font-size-sm);
  color: var(--text-dark);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.options-menu button:hover {
  background: var(--background-alt);
  color: var(--primary-color);
}

.options-menu button i {
  width: 20px;
  color: var(--text-muted);
}

.options-menu button:hover i {
  color: var(--primary-color);
}

/* ===================================
   PAPER MODAL
   =================================== */
.paper-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: var(--spacing-lg);
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.paper-modal {
  background: var(--background);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  border-bottom: 2px solid var(--border-color);
}

.modal-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  flex-shrink: 0;
  /* All PDFs use primary red color */
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  color: var(--primary-color);
}

/* Remove the type-specific colors */
.modal-icon.theory,
.modal-icon.practical {
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  color: var(--primary-color);
}

.modal-title {
  flex: 1;
}

.modal-title h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.modal-title p {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.btn-close {
  background: var(--background-alt);
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-dark);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

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

.modal-details {
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.detail-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--text-dark);
}

.detail-row i {
  color: var(--primary-color);
  width: 20px;
}

.modal-topics {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-top: 2px solid var(--border-color);
}

.modal-topics h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.modal-topics i {
  color: var(--primary-color);
}

.topics-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.topic-badge {
  padding: 6px 12px;
  background: var(--background-alt);
  border-radius: 16px;
  font-size: var(--font-size-xs);
  color: var(--text-dark);
  font-weight: 500;
}

.modal-actions {
  padding: var(--spacing-xl);
  border-top: 2px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.btn-modal {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

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

.btn-modal.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-modal.btn-secondary:hover {
  background: var(--secondary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-modal.btn-solution {
  background: var(--accent-purple);
  color: white;
}

.btn-modal.btn-solution:hover {
  background: #7c3aed;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

/* ===================================
   EMPTY STATE
   =================================== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
  min-height: 400px;
  text-align: center;
}

.empty-icon {
  font-size: 5rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: var(--font-size-2xl);
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
}

.empty-state p {
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-lg);
}

.empty-state .btn {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.empty-state .btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

/* Tablet */
@media (max-width: 968px) {
  .papers-main-area {
    grid-template-columns: 1fr;
  }

  .papers-filters-sidebar {
    position: relative;
    top: 0;
    max-height: none;
  }

  .papers-quick-filters {
    flex-direction: column;
  }

  .quick-filter-group,
  .quick-search-group {
    width: 100%;
    max-width: none;
  }

  .search-wrapper {
    width: 100%;
  }

  .papers-file-grid.comfortable {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }

  .papers-file-grid.spacious {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}

/* Mobile */
@media (max-width: 640px) {
  .papers-top-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }

  .top-bar-actions {
    width: 100%;
    flex-direction: column;
  }

  .search-wrapper {
    width: 100%;
  }

  .papers-file-grid.compact,
  .papers-file-grid.comfortable,
  .papers-file-grid.spacious {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-md);
  }

  .file-icon {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }

  .modal-actions {
    padding: var(--spacing-md);
  }
}

/* ===================================
   ANIMATIONS
   =================================== */
.file-card {
  animation: fadeInUp 0.3s ease;
}

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

/* Stagger animation */
.file-card:nth-child(1) {
  animation-delay: 0.02s;
}
.file-card:nth-child(2) {
  animation-delay: 0.04s;
}
.file-card:nth-child(3) {
  animation-delay: 0.06s;
}
.file-card:nth-child(4) {
  animation-delay: 0.08s;
}
.file-card:nth-child(5) {
  animation-delay: 0.1s;
}
.file-card:nth-child(6) {
  animation-delay: 0.12s;
}

/* ===================================
   SCROLLBAR STYLING
   =================================== */
.papers-filters-sidebar::-webkit-scrollbar,
.paper-modal::-webkit-scrollbar {
  width: 6px;
}

.papers-filters-sidebar::-webkit-scrollbar-track,
.paper-modal::-webkit-scrollbar-track {
  background: var(--background-alt);
  border-radius: 10px;
}

.papers-filters-sidebar::-webkit-scrollbar-thumb,
.paper-modal::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 10px;
}

.papers-filters-sidebar::-webkit-scrollbar-thumb:hover,
.paper-modal::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ====================================
   groupBy year styling
   ==================================== */

.paper-group-section {
  margin-bottom: var(--spacing-2xl);
}

.group-section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 3px solid var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.group-section-count {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--text-muted);
}

/* Grouped papers container */
.papers-grouped-container {
  width: 100%;
}

.papers-grouped-wrapper {
  /* Remove grid from wrapper when grouping */
  display: block;
}

.paper-group-section {
  margin-bottom: var(--spacing-2xl);
}

.paper-group-section .papers-file-grid {
  /* Grid is applied here for each section */
  display: grid;
}
/* ===================================
   DARK MODE SUPPORT
   =================================== */

/* Dark Mode Variables */
:root[data-theme="dark"] {
  /* Primary Colors - Adjusted for dark mode */
  --primary-color: #f87171;
  --primary-shade: #fca5a5;
  --primary-dark: #60a5fa;
  --primary-light: #1e3a8a;

  /* Secondary Colors */
  --secondary-color: #34d399;
  --secondary-dark: #6ee7b7;
  --secondary-light: #064e3b;

  /* Neutral Colors - Key changes */
  --text-dark: #f9fafb;
  --text-light: #d1d5db;
  --text-muted: #9ca3af;
  --background: #111827;
  --background-alt: #1f2937;
  --background-dark: #374151;

  /* Accent Colors - Brightened */
  --accent-orange: #fbbf24;
  --accent-red: #f87171;
  --accent-purple: #a78bfa;

  /* Border & Shadow */
  --border-color: #374151;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

/* Automatic dark mode based on system preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary-color: #f87171;
    --primary-shade: #fca5a5;
    --primary-dark: #60a5fa;
    --primary-light: #1e3a8a;

    --secondary-color: #34d399;
    --secondary-dark: #6ee7b7;
    --secondary-light: #064e3b;

    --text-dark: #f9fafb;
    --text-light: #d1d5db;
    --text-muted: #9ca3af;
    --background: #111827;
    --background-alt: #1f2937;
    --background-dark: #374151;

    --accent-orange: #fbbf24;
    --accent-red: #f87171;
    --accent-purple: #a78bfa;

    --border-color: #374151;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  }
}