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

html {
  font-size: 16px;
  --webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

img {
  max-width: 100%;
  height: auto;
}

/* App Container */
.app-container {
  display: flex;
  flex: 1;
  padding-top: var(--header-height);
}

.main-content {
  flex: 1;
  padding: 1.5rem;
  max-width: 100%;
  overflow-x: hidden;
}

@media (min-width: 768px) {
  .main-content {
    padding: 2rem;
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 0.5rem;
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p { margin-bottom: 1rem; }

.text-muted { color: var(--color-text-muted); }
.text-danger { color: var(--color-error); }
.text-success { color: var(--color-success); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  color: white;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
}

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

.btn-danger:hover:not(:disabled) {
  background-color: #dc2626;
  color: white;
}

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

.btn-success:hover:not(:disabled) {
  background-color: #059669;
  color: white;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.btn-icon-only {
  padding: 0.5rem;
}

.btn-icon-only svg {
  width: 1.25rem;
  height: 1.25rem;
}

.btn-group {
  display: flex;
  gap: 0.25rem;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.375rem;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.form-hint {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

.badge-admin { background-color: var(--color-primary-bg); color: var(--color-primary); }
.badge-standard { background-color: var(--color-bg-tertiary); color: var(--color-text-secondary); }
.badge-success { background-color: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background-color: var(--color-warning-bg); color: var(--color-warning); }
.badge-error { background-color: var(--color-error-bg); color: var(--color-error); }
.badge-info { background-color: var(--color-info-bg); color: var(--color-info); }
.badge-hidden { background-color: var(--color-bg-tertiary); color: var(--color-text-muted); }

/* Alerts */
.alerts-container {
  margin-bottom: 1.5rem;
}

.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
}

.alert-icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.alert-close {
  margin-left: auto;
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}

.alert-close:hover {
  opacity: 1;
}

.alert-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

.alert-error {
  background-color: var(--color-error-bg);
  color: var(--color-error);
}

.alert-info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
}

/* Tables */
.table-responsive {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.table th {
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
}

.table tr:hover {
  background-color: var(--color-bg-secondary);
}

.row-disabled {
  opacity: 0.5;
}

/* Cards */
.admin-card,
.settings-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.card-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
}

.card-header h2 {
  margin: 0;
  font-size: 1.125rem;
}

.card-body {
  padding: 1.5rem;
}

.settings-card-danger {
  border-color: var(--color-error);
}

.settings-card-danger .card-header {
  background-color: var(--color-error-bg);
  color: var(--color-error);
}

/* Grid Layouts */
.admin-grid,
.settings-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .admin-grid,
  .settings-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--color-text-muted);
}

.empty-icon {
  width: 3rem;
  height: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

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

.page-header h1 {
  margin: 0;
}

/* Breadcrumb */
.breadcrumb {
  margin-bottom: 1.5rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.875rem;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.breadcrumb-item a {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--color-text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-bg);
}

.breadcrumb-icon {
  width: 1rem;
  height: 1rem;
}

.breadcrumb-separator {
  width: 1rem;
  height: 1rem;
  color: var(--color-text-muted);
}

/* File List */
.file-list {
  display: grid;
  gap: 0.5rem;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.file-item:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-bg);
  color: var(--color-text);
}

.file-item-hidden {
  opacity: 0.6;
}

.file-icon {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  color: var(--color-text-secondary);
}

.file-item-folder .file-icon {
  color: var(--color-warning);
}

.file-icon-pdf {
  color: var(--color-error);
}

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

.file-name {
  display: block;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-size {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.stat-pending { color: var(--color-warning); }
.stat-completed { color: var(--color-success); }
.stat-rejected { color: var(--color-error); }

/* Tasks List */
.tasks-list {
  display: grid;
  gap: 1rem;
}

.task-item {
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
}

.task-pending { border-left: 3px solid var(--color-warning); }
.task-completed { border-left: 3px solid var(--color-success); }
.task-rejected { border-left: 3px solid var(--color-error); }

.task-header {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.task-title {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.task-description {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

.task-meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.task-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

/* Info List */
.info-list {
  display: grid;
  gap: 1rem;
}

.info-item {
  display: flex;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-light);
}

.info-item dt {
  font-weight: 500;
  color: var(--color-text-secondary);
}

.info-item dd {
  text-align: right;
}

/* Directory List */
.directory-list {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.directory-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

.directory-hidden {
  opacity: 0.6;
}

.directory-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  color: var(--color-text);
}

.directory-icon {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-warning);
}

/* File Drop Zone */
.file-drop-zone {
  position: relative;
  padding: 2rem;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
  border-color: var(--color-primary);
  background-color: var(--color-primary-bg);
}

.file-drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-icon {
  width: 3rem;
  height: 3rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
}

.file-list-preview {
  margin-top: 1rem;
}

.file-preview-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: 0.25rem;
}

.file-preview-item svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-error);
}

.file-preview-item .file-size {
  margin-left: auto;
}

/* Auth Pages */
.page-auth {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - var(--footer-height));
  padding: 2rem 1rem;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.auth-header h1 {
  margin-bottom: 0.5rem;
}

.auth-header p {
  color: var(--color-text-secondary);
  margin: 0;
}

.auth-form {
  margin-bottom: 1.5rem;
}

.auth-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: center;
  font-size: 0.875rem;
}

/* Home Page */
.page-home {
  max-width: 1000px;
}

.welcome-card {
  background-color: var(--color-primary-bg);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.welcome-card h1 {
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.welcome-card p {
  margin: 0;
  color: var(--color-text);
}

.quick-actions h2 {
  margin-bottom: 1rem;
}

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

.action-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.action-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--color-text);
}

.action-icon {
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
}

.action-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.action-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.action-card-primary {
  background: linear-gradient(135deg, var(--color-primary-bg) 0%, var(--color-bg) 100%);
  border-color: var(--color-primary);
  border-width: 2px;
}

.action-card-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-bg) 0%, var(--color-primary-bg) 100%);
  border-color: var(--color-primary-dark);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.2);
}

.action-card-primary .action-icon {
  color: var(--color-primary);
  filter: drop-shadow(0 2px 4px rgba(37, 99, 235, 0.3));
}

/* Error Page */
.page-error {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - var(--footer-height));
  padding: 2rem;
}

.error-card {
  text-align: center;
  max-width: 400px;
}

.error-card .error-icon {
  width: 4rem;
  height: 4rem;
  color: var(--color-error);
  margin-bottom: 1rem;
}

.error-card h1 {
  margin-bottom: 0.5rem;
}

.error-card p {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal.active {
  display: flex;
}

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

.modal-content {
  position: relative;
  width: 100%;
  max-width: 400px;
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

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

.modal-header h3 {
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
}

/* Dropdown Menu */
.admin-controls {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 180px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 100;
}

.dropdown-menu.active {
  display: block;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--color-bg-secondary);
}

.dropdown-item svg {
  width: 1rem;
  height: 1rem;
}

.dropdown-item-danger {
  color: var(--color-error);
}

.dropdown-divider {
  margin: 0.25rem 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

/* Inline Form */
.inline-form {
  display: inline-block;
}

.inline-form select {
  padding: 0.25rem 0.5rem;
  font-size: 0.8125rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
}

/* Spinner */
.spinner {
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Loading Overlay */
.loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background-color: var(--color-bg);
  z-index: 10;
}

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

/* Utility Classes */
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Mobile Adjustments */
@media (max-width: 767px) {
  .action-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .table th,
  .table td {
    padding: 0.5rem;
    font-size: 0.8125rem;
  }

  .btn-group {
    flex-direction: column;
  }
}

/* AI Chat Error Button */
.btn-new-chat {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

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