/* CSS Custom Properties for Theme Support */
:root {
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-secondary: #6b7280;
  --color-success: #10b981;
  --color-success-hover: #059669;
  
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  --color-border: #e2e8f0;
  --color-text-primary: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  
  --color-overlay: rgba(15, 23, 42, 0.8);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* Dark Mode */
[data-theme="dark"] {
  --color-bg-primary: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-tertiary: #334155;
  --color-border: #475569;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-overlay: rgba(0, 0, 0, 0.8);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* App Layout */
.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-primary);
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.logo svg {
  width: 2rem;
  height: 2rem;
}

.mode-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle {
  position: relative;
  background: none;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.settings-btn {
  position: relative;
  background: none;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
  margin-right: 0.5rem;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover,
.settings-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.theme-toggle svg,
.settings-btn svg {
  width: 1.25rem;
  height: 1.25rem;
  transition: transform var(--transition-fast);
}

[data-theme="dark"] .theme-toggle .icon-dark {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-light{
  display: none;
}

/* Main Content */
.main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 2rem 1rem;
}

/* Upload Section */
.upload-section {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  width: 100%;
}

.upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-xl);
  padding: 3rem 2rem;
  text-align: center;
  transition: all var(--transition-fast);
  background-color: var(--color-bg-secondary);
  max-width: 500px;
  width: 100%;
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--color-primary);
  background-color: var(--color-bg-tertiary);
  transform: translateY(-2px);
}

.upload-icon {
  width: 3rem;
  height: 3rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.upload-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text-primary);
}

.upload-content p {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.upload-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-size: 0.875rem;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

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

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

.btn-success:hover:not(:disabled) {
  background-color: var(--color-success-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.btn svg {
  width: 1rem;
  height: 1rem;
}

/* Processing Section */
.processing-section {
  animation: fadeInUp var(--transition-normal);
}

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

.processing-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.progress-info {
  flex: 1;
  max-width: 300px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
  width: 0%;
}

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

.control-buttons {
  display: flex;
  gap: 1rem;
}

/* Single Image View */
.single-view {
  margin-top: 2rem;
}

.image-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.image-panel {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.image-panel h3 {
  padding: 1rem;
  background-color: var(--color-bg-tertiary);
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.image-wrapper {
  padding: 1rem;
  text-align: center;
}

.image-wrapper canvas {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* Bulk View */
.bulk-view {
  margin-top: 2rem;
}

.bulk-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.bulk-stats {
  display: flex;
  gap: 2rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

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

.gallery-item {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.gallery-item-image {
  width: 100%;
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-tertiary);
}

.gallery-item-image canvas {
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--radius-sm);
}

.gallery-item-info {
  padding: 0.75rem;
}

.gallery-item-name {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gallery-item-status {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.gallery-item-status.processing {
  background-color: #fef3c7;
  color: #d97706;
}

.gallery-item-status.completed {
  background-color: #d1fae5;
  color: #059669;
}

.gallery-item-status.error {
  background-color: #fee2e2;
  color: #dc2626;
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn var(--transition-fast);
}

.lightbox-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-overlay);
  backdrop-filter: blur(4px);
}

.lightbox-content {
  position: relative;
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
}

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

.lightbox-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
}

.lightbox-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.lightbox-body {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  position: relative;
  padding: 1rem;
}

.lightbox-image-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  max-height: 60vh;
}

.lightbox-image-container canvas {
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--radius-md);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-text-primary);
}

.lightbox-nav:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
  left: -1.5rem;
}

.lightbox-next {
  right: -1.5rem;
}

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

.lightbox-info {
  display: flex;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.loading-content {
  text-align: center;
  color: white;
}

.loading-spinner {
  width: 3rem;
  height: 3rem;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top: 3px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    padding: 0 1rem;
  }
  
  .logo h1 {
    font-size: 1.25rem;
  }
  
  .main {
    padding: 1rem;
  }
  
  .upload-area {
    padding: 2rem 1rem;
  }
  
  .upload-buttons {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .processing-controls {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }
  
  .control-buttons {
    justify-content: center;
  }
  
  .image-comparison {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
  
  .bulk-controls {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }
  
  .lightbox-content {
    max-width: 95vw;
    max-height: 95vh;
  }
  
  .lightbox-nav {
    width: 2.5rem;
    height: 2.5rem;
  }
  
  .lightbox-prev {
    left: -1rem;
  }
  
  .lightbox-next {
    right: -1rem;
  }
  
  .lightbox-footer {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }
  
  .lightbox-actions {
    text-align: center;
  }
}

/* Settings Modal */
.settings-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn var(--transition-fast);
}

.settings-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-overlay);
  backdrop-filter: blur(4px);
}

.settings-content {
  position: relative;
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  max-width: 600px;
  max-height: 80vh;
  width: 90vw;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

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

.settings-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.settings-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.settings-close:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.settings-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

.settings-section {
  margin-bottom: 2rem;
}

.settings-section h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text-primary);
}

.settings-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.settings-row label {
  min-width: 80px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.settings-row input[type="number"] {
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
  width: 100px;
  transition: border-color var(--transition-fast);
}

.settings-row input[type="number"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

.settings-row input[type="range"] {
  flex: 1;
  margin: 0 0.5rem;
}

.settings-row span {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  min-width: 30px;
}

.color-palette {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.color-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.color-item input[type="color"] {
  width: 50px;
  height: 50px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  background: none;
  transition: border-color var(--transition-fast);
}

.color-item input[type="color"]:hover {
  border-color: var(--color-primary);
}

.color-item span {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-align: center;
}

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

.settings-info {
  flex: 1;
}

.settings-info p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

.settings-actions {
  display: flex;
  gap: 1rem;
}

@media (max-width: 768px) {
  .settings-content {
    max-width: 95vw;
    max-height: 90vh;
  }
  
  .settings-footer {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }
  
  .settings-actions {
    justify-content: center;
  }
  
  .color-palette {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }
}

/* Print Styles */
@media print {
  .header,
  .upload-section,
  .processing-controls,
  .lightbox,
  .settings-modal,
  .footer {
    display: none !important;
  }
}

/* Footer */
.footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  margin-top: auto;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
}

.footer-left p {
  color: var(--color-text-secondary);
  margin: 0;
}

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

.footer-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.footer-links a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-links svg {
  width: 1rem;
  height: 1rem;
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  .footer-links {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
}