/* CSS Variables for Theme Management */
:root {
  --primary-color: #00ADB5;
  --secondary-color: #393E46;
  --dark-color: #222831;
  --light-color: #EEEEEE;
  --accent-color: #FFD369;
  --text-primary: #222831;
  --text-secondary: #393E46;
  --background: #EEEEEE;
  --surface: #FFFFFF;
  --border: rgba(57, 62, 70, 0.2);
  --shadow: rgba(34, 40, 49, 0.1);
  --danger: #e74c3c;
  --success: #27ae60;
  --warning: #f39c12;
}

[data-theme="dark"] {
  --text-primary: #EEEEEE;
  --text-secondary: #EEEEEE;
  --background: #222831;
  --surface: #393E46;
  --border: rgba(238, 238, 238, 0.2);
  --shadow: rgba(0, 0, 0, 0.3);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  transition: all 0.3s ease;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header Styles */
.header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  margin-bottom: 1rem;
  border-radius: 0.5rem;
  box-shadow: 0 2px 4px var(--shadow);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.app-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Button Styles */
.btn-primary, .btn-secondary, .btn-danger, .btn-icon {
  border: none;
  border-radius: 0.375rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: #008a91;
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background-color: #2c313a;
  transform: translateY(-1px);
}

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

.btn-danger:hover {
  background-color: #c0392b;
  transform: translateY(-1px);
}

.btn-icon {
  background-color: transparent;
  color: var(--text-secondary);
  padding: 0.5rem;
  border-radius: 50%;
}

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

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  background-color: var(--surface);
  border-radius: 0.5rem;
  padding: 0.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 2px 4px var(--shadow);
}

.nav-tab {
  flex: 1;
  background: none;
  border: none;
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.nav-tab.active {
  background-color: var(--primary-color);
  color: white;
}

.nav-tab:hover:not(.active) {
  background-color: var(--border);
}

/* Search Section */
.search-section {
  background-color: var(--surface);
  padding: 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 2px 4px var(--shadow);
}

.search-container {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.search-input {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  background-color: var(--background);
  color: var(--text-primary);
  font-size: 1rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 173, 181, 0.1);
}

.filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.filter-select {
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  background-color: var(--background);
  color: var(--text-primary);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-bottom: 2rem;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.content-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.content-header h2 {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
}

.view-toggle {
  display: flex;
  background-color: var(--surface);
  border-radius: 0.375rem;
  overflow: hidden;
  box-shadow: 0 1px 3px var(--shadow);
}

.view-btn {
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

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

/* Items Grid/List */
.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.items-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.item-card {
  background-color: var(--surface);
  border-radius: 0.5rem;
  padding: 1rem;
  box-shadow: 0 2px 4px var(--shadow);
  transition: all 0.2s ease;
  border: 1px solid var(--border);
}

.item-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow);
}

.item-card.list-view {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem;
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.item-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.item-category {
  font-size: 0.75rem;
  color: var(--text-secondary);
  background-color: var(--border);
  padding: 0.25rem 0.5rem;
  border-radius: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.item-actions {
  display: flex;
  gap: 0.25rem;
}

.item-actions .btn-icon {
  padding: 0.25rem;
  font-size: 0.75rem;
}

.item-details {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.item-location, .item-quantity, .item-status {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.item-image {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 0.375rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border);
}

.item-notes {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: 0.5rem;
  padding: 0.5rem;
  background-color: var(--background);
  border-radius: 0.25rem;
}

.status-badge {
  padding: 0.25rem 0.5rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 500;
}

.status-available {
  background-color: var(--success);
  color: white;
}

.status-borrowed {
  background-color: var(--warning);
  color: white;
}

.status-in-use {
  background-color: var(--primary-color);
  color: white;
}

/* Rooms and Categories Grid */
.rooms-grid, .categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.room-card, .category-card {
  background-color: var(--surface);
  border-radius: 0.5rem;
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 2px 4px var(--shadow);
  transition: all 0.2s ease;
  border: 1px solid var(--border);
  cursor: pointer;
}

.room-card:hover, .category-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow);
}

.room-icon, .category-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  display: block;
}

.room-name, .category-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.room-count, .category-count {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.empty-state h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-content {
  background-color: var(--surface);
  border-radius: 0.5rem;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  animation: slideUp 0.3s ease;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.modal-close:hover {
  background-color: var(--border);
}

.modal-body {
  padding: 1.5rem;
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* Form Styles */
.form-group {
  margin-bottom: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  background-color: var(--background);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 173, 181, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.image-preview {
  margin-top: 0.5rem;
  text-align: center;
}

.image-preview img {
  max-width: 100%;
  max-height: 200px;
  border-radius: 0.375rem;
  border: 1px solid var(--border);
}

/* Footer */
.footer {
  background-color: var(--surface);
  padding: 1rem;
  text-align: center;
  border-top: 1px solid var(--border);
  margin-top: auto;
  border-radius: 0.5rem 0.5rem 0 0;
}

.footer p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer a {
  color: var(--primary-color);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .app-container {
    padding: 0 0.5rem;
  }

  .header-content {
    flex-direction: column;
    align-items: stretch;
  }

  .app-title {
    text-align: center;
    justify-content: center;
  }

  .header-actions {
    justify-content: center;
  }

  .nav-tabs {
    flex-direction: column;
  }

  .nav-tab {
    justify-content: flex-start;
  }

  .filters {
    grid-template-columns: 1fr;
  }

  .content-header {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  .items-grid {
    grid-template-columns: 1fr;
  }

  .rooms-grid, .categories-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .modal-content {
    margin: 0.5rem;
  }

  .modal-actions {
    flex-direction: column;
  }

  .item-card.list-view {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
  }
}

@media (max-width: 480px) {
  .search-container {
    flex-direction: column;
  }

  .view-toggle {
    align-self: center;
  }

  .rooms-grid, .categories-grid {
    grid-template-columns: 1fr;
  }

  .room-card, .category-card {
    padding: 1rem;
  }
}

/* Utility Classes */
.icon {
  display: inline-block;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Print Styles */
@media print {
  .header-actions,
  .nav-tabs,
  .search-section,
  .modal,
  .footer {
    display: none;
  }

  .app-container {
    max-width: none;
    padding: 0;
  }

  .item-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #000;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --border: #000;
    --shadow: rgba(0, 0, 0, 0.5);
  }

  .btn-primary, .btn-secondary, .btn-danger {
    border: 2px solid currentColor;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}