/* Multi-Device eSIM Parser Styles */
/* Responsive Design System for Desktop/Tablet/Mobile */

:root {
  /* Primary Color Scheme */
  --primary-purple: #6B46C1;
  --primary-purple-light: #8B5CF6;
  --primary-purple-dark: #553C9A;
  
  /* Background Colors */
  --bg-primary: #F3F0FF;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F9FAFB;
  
  /* Accent Colors */
  --accent-red: #EF4444;
  --accent-orange: #F59E0B;
  --accent-green: #10B981;
  
  /* Text Colors */
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --text-light: #9CA3AF;
  
  /* Borders and Shadows */
  --border-color: #E5E7EB;
  --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);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Device Detection Variables (Set by JavaScript) */
  --current-layout: desktop;
  --base-font-size: 16px;
  --container-padding: 2rem;
  --card-gap: 2rem;
  --grid-columns: 2;
  --touch-target-size: 40px;
  
  /* Responsive Breakpoints */
  --mobile-breakpoint: 480px;
  --tablet-breakpoint: 768px;
  --tablet-max-width: 1024px;
  --desktop-breakpoint: 1200px;
  
  /* Typography Scale */
  --font-scale-mobile: 1.0;
  --font-scale-tablet: 1.1;
  --font-scale-desktop: 1.0;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== Cross-Platform Font Optimization ===== */
body {
  /* Universal fallback font stack */
  font-family: system-ui, -apple-system, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  font-size: var(--base-font-size);
  background: linear-gradient(135deg, var(--bg-primary) 0%, #FEFBFF 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1;
}

/* Windows Device Font Optimization */
.windows-device {
  font-family: 'Segoe UI', 'Segoe UI Symbol', 'Segoe UI Emoji', 'Microsoft Sans Serif', 'Tahoma', 'Arial', sans-serif;
  /* Better font rendering for Windows */
  -webkit-font-smoothing: subpixel-antialiased;
  text-rendering: optimizeSpeed;
  font-variant-ligatures: none;
}

/* macOS Device Font Optimization */
.mac-device {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', 'Arial', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Linux Device Font Optimization */
.linux-device {
  font-family: 'Liberation Sans', 'Ubuntu', 'Cantarell', 'DejaVu Sans', 'Noto Sans', 'Roboto', 'Arial', sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-variant-ligatures: common-ligatures;
}

/* iOS Device Font Optimization */
.ios-device {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Android Device Font Optimization */
.android-device {
  font-family: 'Roboto', 'Noto Sans', 'Droid Sans', 'Arial', sans-serif;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeSpeed;
}

/* High DPI Android Device Optimization (2K+ screens like X200U) */
.android-high-dpi {
  --base-font-size: 17px;
  --container-padding: 1.25rem;
  --card-gap: 1.25rem;
  --touch-target-size: 52px;
}

.android-high-dpi .btn {
  min-height: 52px;
  padding: 1rem 1.25rem;
  font-size: 1.05rem;
  font-weight: 500;
}

.android-high-dpi .input-field, 
.android-high-dpi .textarea-field {
  font-size: 18px; /* Prevent zoom on high DPI Android */
  padding: 1.1rem;
  min-height: 52px;
  border-width: 1.5px;
}

.android-high-dpi .card {
  padding: 1.75rem;
  border-radius: var(--radius-2xl);
}

.android-high-dpi .main-title {
  font-size: 2rem;
  font-weight: 600;
}

.android-high-dpi .sub-title {
  font-size: 1.1rem;
  line-height: 1.6;
}

.android-high-dpi .upload-area {
  padding: 2.5rem 1.5rem;
  min-height: 200px;
  border-width: 2.5px;
}

.android-high-dpi .upload-btn {
  padding: 0.6rem 1.1rem;
  font-size: 0.95rem;
  min-height: 48px;
  border-radius: var(--radius-md);
}

.android-high-dpi .upload-icon {
  font-size: 3.5rem;
}

.android-high-dpi .upload-text {
  font-size: 1.15rem;
}

.android-high-dpi .copy-btn {
  padding: 0.8rem 1.1rem;
  font-size: 0.9rem;
  min-height: 44px;
}

.android-high-dpi .mode-btn {
  padding: 0.9rem 1.1rem;
  font-size: 0.95rem;
  min-height: 48px;
}

.android-high-dpi .display-tab {
  padding: 0.8rem 1rem;
  font-size: 0.9rem;
  min-height: 44px;
}

/* Improved text rendering for high DPI Android */
.android-high-dpi {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Header Styles */
.header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem 0;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-purple);
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 4px rgba(107, 70, 193, 0.1);
  /* Ensure emoji is visible */
  -webkit-text-fill-color: initial;
}

.header .subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Card Layout */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.card {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-purple);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--bg-primary);
}

/* Input Area Styles */
.input-group {
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.input-mode-selector {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0.25rem;
  margin-bottom: 1rem;
}

.mode-btn {
  flex: 1;
  padding: 0.75rem 1rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 500;
}

.mode-btn.active {
  background: var(--primary-purple);
  color: white;
  box-shadow: var(--shadow-sm);
}

.mode-btn:hover:not(.active) {
  background: rgba(107, 70, 193, 0.1);
  color: var(--primary-purple);
}

/* Input Field Styles */
.input-field, .textarea-field, select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  background: var(--bg-tertiary);
  transition: all 0.2s ease;
  font-family: inherit;
}

.input-field:focus, .textarea-field:focus, select:focus {
  outline: none;
  border-color: var(--primary-purple);
  background: white;
  box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.1);
}

.textarea-field {
  min-height: 120px;
  resize: vertical;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

/* Button Styles */
.btn {
  padding: 0.875rem 2rem;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--primary-purple);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--primary-purple-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-purple);
  color: var(--primary-purple);
}

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

.btn-danger:hover {
  background: #DC2626;
}

/* QR Code Display Area */
.qr-display {
  text-align: center;
  padding: 2rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  margin: 2rem 0;
}

.qr-container {
  background: white;
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.qr-info {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.qr-info .lpa-string {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  background: white;
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  word-break: break-all;
  color: var(--text-primary);
  margin: 1rem 0;
}

/* File Upload Area */
.upload-area {
  border: 2px dashed var(--primary-purple);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  background: rgba(107, 70, 193, 0.02);
  cursor: pointer;
  transition: all 0.3s ease;
}

.upload-area:hover {
  background: rgba(107, 70, 193, 0.05);
  border-color: var(--primary-purple-light);
}

.upload-area.dragover {
  background: rgba(107, 70, 193, 0.1);
  border-color: var(--primary-purple-light);
  transform: scale(1.02);
}

.upload-icon {
  font-size: 3rem;
  color: var(--primary-purple);
  margin-bottom: 1rem;
}

.upload-text {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.upload-btn {
  background: var(--primary-purple);
  color: white;
  border: none;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  text-decoration: none;
  font-family: inherit;
}

.upload-btn:hover {
  background: var(--primary-purple-light);
  transform: translateY(-1px);
}

.upload-btn:active {
  transform: translateY(0);
}

.upload-btn .btn-icon {
  font-size: 1em;
}

/* Language Switcher Styles Removed - Now English Only */

/* Title Area */
.header-section {
  text-align: center;
  margin-bottom: 2rem;
}

.main-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-purple);
  margin-bottom: 0.5rem;
  /* Remove gradient that makes emoji invisible */
  /* background: linear-gradient(135deg, var(--primary-purple), var(--primary-purple-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text; */
}

.sub-title {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

/* Language Content Styles Removed - Now English Only */

/* Dialog Styles */
.dialog-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  backdrop-filter: blur(5px);
}

.dialog-content {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  border: 2px solid var(--primary-purple);
}

.dialog-body h3 {
  color: var(--primary-purple);
  margin-bottom: 1rem;
  text-align: center;
}

.dialog-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.dialog-actions button {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-cancel {
  background: #e2e8f0;
  color: #4a5568;
}

.btn-cancel:hover {
  background: #cbd5e0;
}

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

.btn-confirm:hover {
  background: var(--primary-purple-dark);
  transform: translateY(-2px);
}

/* Parse Results Display */
.parse-result {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-top: 2rem;
}

.result-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-color);
}

.result-item:last-child {
  border-bottom: none;
}

.result-label {
  font-weight: 600;
  color: var(--primary-purple);
  font-size: 0.95rem;
  line-height: 1.4;
  padding-top: 0.5rem;
}

.result-value {
  font-family: 'SF Mono', 'Monaco', 'Menlo', 'Ubuntu Mono', 'Courier New', monospace;
  background: white;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  word-break: break-all;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-primary);
  min-height: 2.5rem;
  display: flex;
  align-items: center;
}

/* Notification Styles */
.notification {
  position: fixed;
  top: 2rem;
  right: 2rem;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transform: translateX(calc(100% + 2rem));
  transition: transform 0.3s ease;
  opacity: 0;
  visibility: hidden;
  display: none;
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
}

.notification.success {
  background: #10B981;
  color: white;
}

.notification.error {
  background: var(--accent-red);
  color: white;
}

.notification.warning {
  background: var(--accent-orange);
  color: white;
}

.notification.info {
  background: var(--primary-purple);
  color: white;
}

/* Loading State */
.loading {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .main-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .container {
    padding: 1rem;
  }
  
  .header h1 {
    font-size: 2rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .notification {
    right: 1rem;
    left: 1rem;
    transform: translateX(calc(100% + 1rem));
  }
  
  .notification.show {
    transform: translateX(0);
  }
}

/* Display Mode Toggle */
.display-modes {
  background: var(--card-bg);
  border-radius: 0.75rem;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  margin-top: 1rem;
}

.display-mode-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  background: var(--bg-secondary);
  border-radius: 0.5rem;
  padding: 0.25rem;
}

.display-tab {
  flex: 1;
  padding: 0.75rem 1rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
  font-weight: 500;
}

.display-tab:hover {
  background: var(--hover-bg);
  color: var(--text-primary);
}

.display-tab.active {
  background: var(--primary-purple);
  color: white;
  box-shadow: 0 2px 4px rgba(139, 69, 255, 0.2);
}

.display-content {
  display: none;
}

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

.display-item {
  margin-bottom: 1.5rem;
}

.display-item:last-child {
  margin-bottom: 0;
}

.display-label {
  font-weight: 600;
  color: var(--primary-purple);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.info-display {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1rem;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  font-size: 0.9rem;
  color: var(--text-primary);
  word-break: break-all;
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.qr-code-display {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  margin-bottom: 0.75rem;
}

.qr-code-display canvas {
  max-width: 100%;
  height: auto;
  border-radius: 0.375rem;
}

.copy-btn {
  background: var(--primary-purple);
  color: white;
  border: none;
  border-radius: 0.375rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.copy-btn:hover {
  background: var(--primary-purple-dark);
  transform: translateY(-1px);
}

.copy-btn:active {
  transform: translateY(0);
}

/* ===== Three-Tier Responsive Design System ===== */

/* Desktop Layout (Default) */
.layout-desktop {
  .container {
    max-width: 1200px;
    padding: var(--container-padding);
  }
  
  .main-grid {
    display: grid;
    grid-template-columns: repeat(var(--grid-columns), 1fr);
    gap: var(--card-gap);
  }
  
  .card {
    padding: 2rem;
    border-radius: var(--radius-xl);
  }
  
  .btn {
    min-height: var(--touch-target-size);
    font-size: 0.95rem;
    padding: 0.875rem 2rem;
  }
  
  .header h1 {
    font-size: 2.5rem;
  }
}

/* Tablet Layout (9-13 inch devices) */
.layout-tablet {
  .container {
    max-width: var(--tablet-max-width);
    padding: var(--container-padding);
  }
  
  .main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--card-gap);
  }
  
  /* Tablet landscape: dual column layout */
  @media (orientation: landscape) and (min-width: 900px) {
    .main-grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  
  .card {
    padding: 1.75rem;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
  }
  
  .header h1 {
    font-size: 2.2rem;
  }
  
  .btn {
    min-height: var(--touch-target-size);
    padding: 1rem 1.75rem;
    font-size: 1rem;
    border-radius: 12px;
  }
  
  /* Touch-optimized inputs for tablets */
  .input-field, .textarea-field {
    padding: 1rem;
    font-size: 17px; /* Prevents zoom on iOS */
    border-radius: 12px;
    min-height: 48px;
  }
  
  .upload-area {
    padding: 2.5rem 2rem;
    border-radius: var(--radius-2xl);
  }
  
  .upload-btn {
    padding: 1rem 2rem;
    font-size: 1.05rem;
  }
  
  /* Tablet-specific QR display optimization */
  .qr-container {
    padding: 2.5rem;
    border-radius: var(--radius-2xl);
  }
  
  .display-modes {
    border-radius: var(--radius-2xl);
    padding: 1.75rem;
  }
  
  .copy-btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
    border-radius: 10px;
  }
  
  /* Floating action buttons for tablets */
  .floating-actions {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 100;
  }
  
  .floating-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-purple);
    color: white;
    border: none;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
  }
  
  .floating-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
  }
}

/* Mobile Layout */
.layout-mobile {
  .container {
    padding: var(--container-padding);
    max-width: 100%;
  }
  
  .main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--card-gap);
  }
  
  .card {
    padding: 1.5rem;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
  }
  
  .header h1 {
    font-size: 1.75rem;
  }
  
  .btn {
    width: 100%;
    min-height: var(--touch-target-size);
    padding: 1rem;
    font-size: 1rem;
    border-radius: 12px;
    margin-bottom: 0.75rem;
  }
  
  .input-field, .textarea-field {
    padding: 1rem;
    font-size: 17px; /* Prevents iOS zoom */
    border-radius: 12px;
    min-height: 48px;
  }
  
  .upload-area {
    padding: 2rem 1rem;
    border-radius: var(--radius-2xl);
    min-height: 150px;
  }
  
  /* Mobile-specific: bottom action bar */
  .qr-display {
    padding-bottom: 5rem; /* Space for bottom bar */
  }
  
  .mobile-bottom-actions {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    padding: 1rem;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    z-index: 100;
  }
  
  .mobile-bottom-actions .btn {
    margin-bottom: 0.5rem;
  }
  
  /* Mobile gesture area */
  .mobile-gesture-area {
    position: fixed;
    top: 0;
    left: 0;
    width: 20px;
    height: 100%;
    z-index: 1000;
    pointer-events: auto;
  }
}

/* ===== Device Rotation Adaptation ===== */
@media (orientation: landscape) {
  .layout-mobile .header h1 {
    font-size: 1.5rem;
  }
  
  .layout-tablet .upload-area {
    padding: 1.5rem;
  }
}

@media (orientation: portrait) {
  .layout-tablet .main-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== High DPI Screen Optimization ===== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .qr-container canvas {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    image-rendering: pixelated;
  }
}

/* ===== Accessibility Optimizations ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Improved focus visibility for keyboard navigation */
:focus {
  outline: 2px solid var(--primary-purple);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ===== Dark Mode Support ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1F2937;
    --bg-secondary: #111827;
    --bg-tertiary: #374151;
    --text-primary: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-light: #9CA3AF;
    --border-color: #4B5563;
  }
  
  body {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0F172A 100%);
  }
  
  .layout-tablet, .layout-mobile {
    .card {
      background: var(--bg-secondary);
      border-color: var(--border-color);
    }
    
    .input-field, .textarea-field {
      background: var(--bg-tertiary);
      border-color: var(--border-color);
      color: var(--text-primary);
    }
    
    .upload-area {
      background: rgba(107, 70, 193, 0.1);
      border-color: var(--primary-purple);
    }
  }
}

/* ===== Legacy Responsive Fallbacks ===== */
@media (max-width: 480px) {
  .header h1 {
    font-size: 1.75rem;
  }
  
  .card {
    padding: 1rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }
  
  .display-mode-tabs {
    flex-direction: column;
    gap: 0.25rem;
  }
  
  .display-tab {
    padding: 0.6rem 0.8rem;
    font-size: 0.85rem;
  }
  
  /* Mobile-specific parsing results layout */
  .result-item {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding: 1rem 0;
  }
  
  .result-label {
    padding-top: 0;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
  }
  
  .result-value {
    font-size: 0.85rem;
    padding: 0.6rem 0.8rem;
    min-height: 2rem;
  }
}

/* ===== GitHub Button Styling ===== */
.github-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, #24292e 0%, #1a1e22 100%);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.github-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, #2c3138 0%, #24292e 100%);
}

.github-btn:active {
  transform: translateY(0);
}

.github-btn svg {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.github-btn:hover svg {
  transform: scale(1.1);
}

.github-stats {
  background: rgba(255, 255, 255, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  margin-left: 0.5rem;
  backdrop-filter: blur(10px);
}

/* Responsive GitHub button */
@media (max-width: 480px) {
  .github-btn {
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
  }
  
  .github-btn svg {
    width: 14px;
    height: 14px;
  }
}

/* Dark mode GitHub button */
@media (prefers-color-scheme: dark) {
  .github-btn {
    background: linear-gradient(135deg, #f6f8fa 0%, #e1e4e8 100%);
    color: #24292e;
    border-color: rgba(0, 0, 0, 0.1);
  }
  
  .github-btn:hover {
    background: linear-gradient(135deg, #e1e4e8 0%, #d1d5da 100%);
  }
  
  .github-stats {
    background: rgba(0, 0, 0, 0.1);
  }
}