/* Mobile First Responsive Design */

/* Large Desktop (1440px and up) */
@media (min-width: 1440px) {
  .main-content {
    grid-template-columns: 1fr 450px;
    grid-template-areas: 
      "preview controls";
    gap: var(--spacing-5xl);
    align-items: start;
  }
  
  .controls-panel {
    padding: var(--spacing-2xl);
    max-height: calc(100vh - 120px);
  }
  
  .app-header {
    padding: var(--spacing-xl) var(--spacing-5xl);
  }
}

/* Desktop (1024px to 1439px) */
@media (max-width: 1439px) and (min-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr 400px;
    grid-template-areas: 
      "preview controls";
    padding: var(--spacing-2xl);
    align-items: start;
  }
  
  .preview-container {
    padding: var(--spacing-3xl);
  }
  
  .controls-panel {
    max-height: calc(100vh - 100px);
  }
}

/* Tablet (768px to 1023px) */
@media (max-width: 1023px) {
  .main-content {
    grid-template-columns: 1fr;
    grid-template-areas: 
      "preview"
      "controls"
      "export"
      "gallery";
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
  }
  
  .preview-panel {
    order: 1;
  }
  
  .controls-panel {
    order: 2;
    max-height: none;
    height: auto;
    position: static;
    top: auto;
  }
  
  .export-panel {
    order: 3;
  }
  
  .gallery-panel {
    order: 4;
  }
  
  .preview-panel {
    order: 1;
  }
  
  .controls-panel {
    order: 2;
    max-height: none;
    height: auto;
    position: static;
    top: auto;
  }
  
  .export-panel {
    order: 3;
  }
  
  .gallery-panel {
    order: 4;
  }
  
  /* Hide desktop nested version on tablet */
  .desktop-only {
    display: none !important;
  }
  
  .mobile-only {
    display: block !important;
  }
  
  .export-panel {
    display: block;
  }
  
  .gallery-panel {
    display: block;
  }
  
  .app-header {
    padding: var(--spacing-lg) var(--spacing-xl);
  }
  
  .app-title {
    font-size: var(--font-size-xl);
  }
  
  #previewCanvas {
    max-height: 50vh;
  }
  
  .gradient-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .gallery-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  
  .action-buttons {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
}

/* Mobile (480px to 767px) */
@media (max-width: 767px) {
  .main-content {
    grid-template-columns: 1fr;
    grid-template-areas: 
      "preview"
      "controls"
      "export"
      "gallery";
    padding: var(--spacing-lg);
    gap: var(--spacing-lg);
  }
  
  /* Canvas controls after controls panel on mobile */
  .canvas-controls {
    order: 3;
  }
  
  /* Hide desktop nested version on mobile */
  .desktop-only {
    display: none !important;
  }
  
  .mobile-only {
    display: block !important;
  }
  
  .export-panel {
    display: block;
  }
  
  .gallery-panel {
    display: block;
  }
  
  .app-header {
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .app-title {
    font-size: var(--font-size-lg);
  }
  
  .preview-container {
    padding: var(--spacing-xl);
  }
  
  .controls-panel {
    padding: var(--spacing-lg);
    position: static;
    top: auto;
    max-height: none;
    border-radius: var(--radius-lg);
  }
  
  .accordion-header {
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
  }
  
  .accordion-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
  }
  
  .color-palette {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .gradient-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .gallery-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .button-group .btn {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  
  .button-group .btn:last-child {
    border-bottom: none;
  }
  
 
  /* Hide desktop export buttons on mobile */
  .accordion-section:last-child .action-buttons {
    display: none;
  }
  
}

/* Small Mobile (320px to 479px) */
@media (max-width: 479px) {
  .main-content {
    grid-template-columns: 1fr;
    grid-template-areas: 
      "preview"
      "controls"
      "export"
      "gallery";
    padding: var(--spacing-md);
  }
  
  /* Canvas controls after controls panel on small mobile */
  .canvas-controls {
    order: 3;
  }
  
  /* Hide desktop nested version on small mobile */
  .desktop-only {
    display: none !important;
  }
  
  .mobile-only {
    display: block !important;
  }
  
  .export-panel {
    display: block;
  }
  
  .gallery-panel {
    display: block;
  }
  
  .app-header {
    padding: var(--spacing-sm) var(--spacing-md);
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
  
  .app-title {
    font-size: var(--font-size-base);
  }
  
  .preview-container {
    padding: var(--spacing-lg);
  }
  
  .controls-panel {
    padding: var(--spacing-md);
  }
  
  .accordion-header {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .accordion-content {
    padding: 0 var(--spacing-md) var(--spacing-md);
  }
  
  .color-palette {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .gradient-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
  }
  
 
  .control-group {
    margin-bottom: var(--spacing-lg);
  }
  
}

/* Landscape Mobile */
@media (max-width: 767px) and (orientation: landscape) {
  .main-content {
    grid-template-columns: 1fr 260px;
    grid-template-areas: 
      "preview controls"
      "export export"
      "gallery gallery";
    gap: var(--spacing-lg);
  }
  
  .preview-panel {
    order: 1;
  }
  
  .controls-panel {
    order: 2;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
  }
  
  .export-panel {
    order: 3;
  }
  
  .gallery-panel {
    order: 4;
  }
  
  /* Hide desktop nested version on mobile landscape */
  .desktop-only {
    display: none !important;
  }
  
  .mobile-only {
    display: block !important;
  }
  
  .export-panel {
    display: block;
    order: 3;
  }
  
  .gallery-panel {
    display: block;
    order: 4;
  }
  

  .accordion-section:last-child .action-buttons {
    display: grid;
  }
  
  #previewCanvas {
    max-height: 60vh;
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 2dppx) {
  .color-swatch,
  .gradient-swatch {
    border-width: 1px;
  }
  
  .gallery-item {
    border-width: 1px;
  }
  
  .toast {
    border-width: 1px;
  }
}

/* Reduce Motion for Accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .btn:hover:not(:disabled) {
    transform: none;
  }
  
  .color-swatch:hover,
  .gradient-swatch:hover {
    transform: none;
  }
  
  .gallery-item:hover {
    transform: none;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --color-text-primary: #000000;
    --color-bg-primary: #ffffff;
  }
  
  [data-theme="dark"] {
    --color-border: #ffffff;
    --color-text-primary: #ffffff;
    --color-bg-primary: #000000;
  }
  
  .btn-outline {
    border-width: 2px;
  }
  
  .accordion-section {
    border-width: 2px;
  }
  
  input[type="checkbox"] {
    border-width: 2px;
  }
}

/* Print Styles */
@media print {
  .app-header,
  .controls-panel {
    display: none !important;
  }
  
  .main-content {
    grid-template-columns: 1fr;
    padding: 0;
  }
  
  .preview-panel {
    page-break-inside: avoid;
  }
  
  .preview-container {
    box-shadow: none;
    border: 1px solid #000;
  }
  
  #previewCanvas {
    max-width: 100%;
    height: auto;
  }
}

/* Hover and Focus States for Better Accessibility */
@media (hover: hover) and (pointer: fine) {
  .btn:hover {
    box-shadow: var(--shadow-md);
  }
  
  .accordion-header:hover {
    background-color: var(--color-bg-tertiary);
  }
  
  .color-swatch:hover,
  .gradient-swatch:hover {
    box-shadow: var(--shadow-md);
  }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
  .btn {
    min-height: 44px;
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .color-swatch,
  .gradient-swatch {
    min-height: 44px;
  }
  
  .gallery-item {
    min-height: 44px;
  }
  
  .slider::-webkit-slider-thumb {
    width: 24px;
    height: 24px;
  }
  
  .slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
  }
  
  input[type="checkbox"] {
    width: 22px;
    height: 22px;
  }
}

/* Dark Mode Specific Responsive Adjustments */
[data-theme="dark"] {
  .preview-container::before {
    opacity: 0.1;
  }
  
  .toast {
    backdrop-filter: blur(8px);
  }
}

/* Performance Optimizations for Low-End Devices */
@media (max-width: 767px) {
  .preview-container::before {
    display: none;
  }
  
  .btn:hover:not(:disabled) {
    transform: none;
  }
  
  .accordion-content {
    animation: none;
  }
  
  .toast {
    animation-duration: 0.2s;
  }
}