/* DeepParse RAG System - Main Stylesheet */
/* Following brandbook.md specifications */

:root {
  /* Primary Colors */
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-primary-light: #dbeafe;

  /* Status Colors */
  --color-success: #10b981;
  --color-success-dark: #059669;
  --color-warning: #f59e0b;
  --color-warning-dark: #d97706;
  --color-error: #ef4444;
  --color-error-dark: #dc2626;
  --color-pending: #6b7280;

  /* Neutral Colors */
  --color-text-primary: #111827;
  --color-text-secondary: #6b7280;
  --color-border: #e5e7eb;
  --color-bg: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-tertiary: #f3f4f6;

  /* Spacing (8px base unit) */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-h1: 2rem;
  --font-size-h2: 1.5rem;
  --font-size-h3: 1.25rem;
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;
  --font-size-xs: 0.75rem;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg-secondary);
  line-height: 1.5;
}

/* Typography */
h1 {
  font-size: var(--font-size-h1);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: var(--color-text-primary);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

/* Layout */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-md);
}

@media (min-width: 1024px) {
  .container {
    padding: var(--space-xl);
  }
}

.header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  margin-bottom: var(--space-xl);
}

.header-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: var(--font-size-h3);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.nav {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link.active {
  color: var(--color-primary);
}

/* Cards */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  margin-bottom: var(--space-lg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-body);
  font-weight: 600;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  gap: var(--space-sm);
}

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

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

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

.btn-secondary {
  background-color: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-small);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.form-input {
  width: 100%;
  padding: 0.75rem;
  font-size: var(--font-size-body);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input.error {
  border-color: var(--color-error);
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-small);
  margin-top: var(--space-xs);
}

/* File Upload Zone */
.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: 8px;
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background-color: var(--color-bg);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.upload-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto var(--space-md);
  color: var(--color-text-secondary);
}

.upload-text {
  color: var(--color-text-secondary);
  font-size: var(--font-size-body);
  margin-bottom: var(--space-xs);
}

.upload-hint {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
}

#fileInput {
  display: none;
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-weight: 500;
  font-size: var(--font-size-small);
  gap: var(--space-xs);
}

.badge-pending {
  background-color: var(--color-bg-tertiary);
  color: var(--color-pending);
}

.badge-processing {
  background-color: #fef3c7;
  color: var(--color-warning-dark);
}

.badge-completed {
  background-color: #d1fae5;
  color: var(--color-success-dark);
}

.badge-error {
  background-color: #fee2e2;
  color: var(--color-error-dark);
}

/* Status indicator dot */
.status-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.pending {
  background-color: var(--color-pending);
}

.status-dot.processing {
  background-color: var(--color-warning);
  animation: pulse 2s infinite;
}

.status-dot.completed {
  background-color: var(--color-success);
}

.status-dot.error {
  background-color: var(--color-error);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Tables */
.table-container {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-bg);
}

thead {
  background-color: var(--color-bg-secondary);
}

th {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  font-weight: 600;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

tbody tr {
  transition: background-color var(--transition-fast);
}

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

tbody tr:last-child td {
  border-bottom: none;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--color-text-secondary);
}

.empty-state-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto var(--space-md);
  color: var(--color-text-secondary);
  opacity: 0.5;
}

.empty-state-text {
  font-size: var(--font-size-h3);
  margin-bottom: var(--space-sm);
}

.empty-state-hint {
  font-size: var(--font-size-body);
}

/* Alert Messages */
.alert {
  padding: var(--space-md);
  border-radius: 6px;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.alert-success {
  background-color: #d1fae5;
  border: 1px solid var(--color-success);
  color: var(--color-success-dark);
}

.alert-error {
  background-color: #fee2e2;
  border: 1px solid var(--color-error);
  color: var(--color-error-dark);
}

.alert-warning {
  background-color: #fef3c7;
  border: 1px solid var(--color-warning);
  color: var(--color-warning-dark);
}

.alert-icon {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.spinner-lg {
  width: 3rem;
  height: 3rem;
  border-width: 3px;
}

/* Progress Bar */
.progress {
  width: 100%;
  height: 0.5rem;
  background-color: var(--color-border);
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-md);
}

.modal {
  background-color: var(--color-bg);
  border-radius: 12px;
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  animation: fadeIn var(--transition-slow);
}

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

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

.modal-title {
  font-size: var(--font-size-h2);
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-h2);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-text-primary);
}

.modal-body {
  padding: var(--space-xl);
}

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

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.pagination button {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination button:hover:not(:disabled) {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-primary);
}

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

.pagination .page-info {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  margin: 0 var(--space-md);
}

/* Filter Section */
.filter-section {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  align-items: flex-end;
}

.filter-group {
  flex: 1;
  min-width: 200px;
}

/* Chunk Display */
.chunk-item {
  background-color: var(--color-bg-secondary);
  padding: var(--space-md);
  border-radius: 6px;
  margin-bottom: var(--space-md);
}

.chunk-meta {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

.chunk-text {
  color: var(--color-text-primary);
  line-height: 1.6;
  white-space: pre-wrap;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-small {
  font-size: var(--font-size-small);
}

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

.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-lg); }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-lg); }

.hidden {
  display: none;
}

.flex {
  display: flex;
}

.gap-2 {
  gap: var(--space-md);
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

/* Responsive */
@media (max-width: 640px) {
  .header-content {
    flex-direction: column;
    gap: var(--space-md);
  }

  .nav {
    gap: var(--space-md);
  }

  .filter-section {
    flex-direction: column;
  }

  .filter-group {
    width: 100%;
  }

  table {
    font-size: var(--font-size-small);
  }

  th, td {
    padding: var(--space-sm) var(--space-md);
  }
}

/* Query Page Styles */
.answer-content {
  color: var(--color-text-primary);
  line-height: 1.8;
  font-size: var(--font-size-body);
  padding: var(--space-md);
  background-color: var(--color-bg-secondary);
  border-radius: 6px;
  border-left: 4px solid var(--color-primary);
}

.chunk-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  transition: box-shadow var(--transition-fast);
}

.chunk-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.chunk-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.chunk-meta-row {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

.chunk-number {
  font-weight: 600;
  color: var(--color-text-primary);
}

.chunk-similarity {
  color: var(--color-primary);
  font-weight: 500;
  font-size: var(--font-size-small);
}

.chunk-page {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
}

.chunk-document {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  font-style: italic;
}

.chunk-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.5rem 1rem;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: var(--font-size-small);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.chunk-toggle:hover {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-primary);
}

.chunk-toggle svg {
  transition: transform var(--transition-fast);
}

.chunk-metadata {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.metadata-badge {
  display: inline-flex;
  padding: 0.25rem 0.75rem;
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 9999px;
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.chunk-text {
  color: var(--color-text-primary);
  line-height: 1.7;
  white-space: pre-wrap;
  word-wrap: break-word;
  padding: var(--space-md);
  background-color: var(--color-bg-secondary);
  border-radius: 6px;
  margin-top: var(--space-sm);
  font-size: var(--font-size-small);
}

.retrieval-info {
  padding: var(--space-md);
  background-color: var(--color-bg-secondary);
  border-radius: 6px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm);
  background-color: var(--color-bg);
  border-radius: 6px;
  border: 1px solid var(--color-border);
}

.info-label {
  font-weight: 500;
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
}

.info-value {
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: var(--font-size-small);
}

.info-value.highlight {
  color: var(--color-primary);
  font-size: var(--font-size-body);
}

textarea.form-input {
  resize: vertical;
  min-height: 80px;
  font-family: var(--font-family);
}

/* Query page responsive adjustments */
@media (max-width: 640px) {
  .chunk-meta-row {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .chunk-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }

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

/* Markdown Rendering Styles for Answer Content */
/* Following brandbook.md typography and color specifications */

.answer-content h1,
.answer-content h2,
.answer-content h3,
.answer-content h4,
.answer-content h5,
.answer-content h6 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-md);
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.answer-content h1:first-child,
.answer-content h2:first-child,
.answer-content h3:first-child {
  margin-top: 0;
}

.answer-content h1 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--space-sm);
}

.answer-content h2 {
  font-size: var(--font-size-h3);
}

.answer-content h3 {
  font-size: 1.125rem;
}

.answer-content h4,
.answer-content h5,
.answer-content h6 {
  font-size: var(--font-size-body);
}

.answer-content p {
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.answer-content p:last-child {
  margin-bottom: 0;
}

.answer-content strong {
  font-weight: 600;
  color: var(--color-text-primary);
}

.answer-content em {
  font-style: italic;
  color: var(--color-text-primary);
}

.answer-content code {
  background-color: var(--color-bg-tertiary);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', monospace;
  font-size: 0.875em;
  color: var(--color-error-dark);
  border: 1px solid var(--color-border);
}

.answer-content pre {
  background-color: var(--color-bg-tertiary);
  padding: var(--space-md);
  border-radius: 6px;
  border: 1px solid var(--color-border);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}

.answer-content pre code {
  background-color: transparent;
  padding: 0;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.answer-content ul,
.answer-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

.answer-content ul {
  list-style-type: disc;
}

.answer-content ol {
  list-style-type: decimal;
}

.answer-content li {
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

.answer-content li:last-child {
  margin-bottom: 0;
}

.answer-content ul ul,
.answer-content ol ol,
.answer-content ul ol,
.answer-content ol ul {
  margin-top: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.answer-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
  color: var(--color-text-secondary);
  font-style: italic;
  background-color: var(--color-bg-tertiary);
  padding: var(--space-md);
  border-radius: 0 6px 6px 0;
}

.answer-content blockquote p:last-child {
  margin-bottom: 0;
}

.answer-content a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

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

.answer-content hr {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: var(--space-lg) 0;
}

.answer-content table {
  width: 100%;
  margin-bottom: var(--space-md);
  border-collapse: collapse;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
}

.answer-content table thead {
  background-color: var(--color-bg-secondary);
}

.answer-content table th {
  padding: var(--space-md);
  text-align: left;
  font-weight: 600;
  color: var(--color-text-primary);
  border-bottom: 2px solid var(--color-border);
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.answer-content table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: var(--font-size-small);
}

.answer-content table tbody tr {
  transition: background-color var(--transition-fast);
}

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

.answer-content table tbody tr:last-child td {
  border-bottom: none;
}

.answer-content table th:first-child,
.answer-content table td:first-child {
  padding-left: var(--space-lg);
}

.answer-content table th:last-child,
.answer-content table td:last-child {
  padding-right: var(--space-lg);
}

.answer-content del,
.answer-content strike {
  color: var(--color-text-secondary);
  text-decoration: line-through;
}

.answer-content ins {
  color: var(--color-success-dark);
  text-decoration: none;
  background-color: #d1fae5;
  padding: 0.1rem 0.2rem;
  border-radius: 3px;
}

.answer-content sup,
.answer-content sub {
  font-size: 0.75em;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

.answer-content sup {
  top: -0.5em;
}

.answer-content sub {
  bottom: -0.25em;
}

/* Responsive markdown table adjustments */
@media (max-width: 640px) {
  .answer-content table {
    font-size: var(--font-size-xs);
  }

  .answer-content table th,
  .answer-content table td {
    padding: var(--space-sm);
  }

  .answer-content table th:first-child,
  .answer-content table td:first-child {
    padding-left: var(--space-sm);
  }

  .answer-content table th:last-child,
  .answer-content table td:last-child {
    padding-right: var(--space-sm);
  }
}

/* Tab Interface Styles */
/* Following brandbook.md specifications for active/inactive states and transitions */

.tabs-container {
  margin-bottom: var(--space-lg);
}

.tabs-header {
  display: flex;
  gap: var(--space-sm);
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-xl);
}

.tab-button {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--color-text-secondary);
  font-size: var(--font-size-body);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  bottom: -2px;
}

.tab-button:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-secondary);
}

.tab-button.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.tab-button svg {
  flex-shrink: 0;
}

.tab-content {
  display: none;
  animation: fadeIn var(--transition-slow);
}

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

/* Responsive tab adjustments */
@media (max-width: 640px) {
  .tabs-header {
    flex-direction: column;
    gap: 0;
    border-bottom: none;
  }

  .tab-button {
    border-bottom: 1px solid var(--color-border);
    border-left: 3px solid transparent;
    bottom: 0;
    padding: var(--space-md);
  }

  .tab-button.active {
    border-bottom-color: var(--color-border);
    border-left-color: var(--color-primary);
  }
}