/* Modern Dashboard Styles - PDF Processing Interface */

/* CSS Custom Properties for theming */
:root {
  /* Color Palette */
  --primary-color: #6366f1;
  --primary-hover: #5855eb;
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  
  /* Neutral Colors */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --background-primary: #ffffff;
  --background-secondary: #f9fafb;
  --background-tertiary: #f3f4f6;
  --background-card: #ffffff;
  
  /* Border Colors */
  --border-primary: #e5e7eb;
  --border-secondary: #d1d5db;
  --border-focus: var(--primary-color);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-light: #9ca3af;
    --background-primary: #111827;
    --background-secondary: #1f2937;
    --background-tertiary: #374151;
    --background-card: #1f2937;
    --border-primary: #374151;
    --border-secondary: #4b5563;
  }
}

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

body {
  font-family: var(--font-family);
  background: var(--background-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Dashboard Container */
.dashboard-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header Styles */
.dashboard-header {
  background: var(--background-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-primary);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo-icon {
  font-size: 48px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-text h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.logo-text p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.header-actions {
  display: flex;
  gap: var(--spacing-md);
}

/* Tab Navigation */
.tab-navigation {
  display: flex;
  background: var(--background-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-primary);
  gap: var(--spacing-sm);
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.tab-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 0;
}

.tab-btn.active {
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.tab-btn.active::before {
  opacity: 1;
}

.tab-btn:hover:not(.active) {
  background: var(--background-tertiary);
  color: var(--text-primary);
}

.tab-icon {
  font-size: 20px;
  z-index: 1;
  position: relative;
}

.tab-text {
  z-index: 1;
  position: relative;
}

/* Tab Panels */
.tab-panels {
  flex: 1;
}

.tab-panel {
  display: none;
  background: var(--background-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-primary);
  animation: slideIn var(--transition-normal);
}

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

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

/* Panel Header */
.panel-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.panel-header h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.panel-header p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Form Styles */
.upload-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-xl);
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: var(--font-size-md);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.form-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-md);
  background: var(--background-primary);
  color: var(--text-primary);
  transition: all var(--transition-normal);
  outline: none;
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder {
  color: var(--text-light);
}

.form-input.error {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-help {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.required {
  color: var(--error-color);
  font-weight: 600;
}

/* Upload Area */
.upload-area {
  border: 2px dashed var(--border-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  background: var(--background-secondary);
  position: relative;
  overflow: hidden;
}

.upload-area::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 0;
}

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

.upload-area:hover::before {
  opacity: 0.05;
}

.upload-area.dragover {
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.1);
  transform: scale(1.02);
}

.upload-content {
  position: relative;
  z-index: 1;
}

.upload-icon {
  font-size: 48px;
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
  transition: color var(--transition-normal);
}

.upload-area:hover .upload-icon {
  color: var(--primary-color);
}

.upload-text {
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

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

.file-input {
  display: none;
}

/* Preview Styles */
.stamp-preview,
.pdf-preview {
  margin-top: var(--spacing-md);
  background: var(--background-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 1px solid var(--border-primary);
}

.preview-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

#stampPreviewImg {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-primary);
}

.pdf-icon {
  font-size: 48px;
  color: var(--error-color);
}

.preview-info {
  flex: 1;
}

.file-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.file-size {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.page-count {
  font-size: var(--font-size-sm);
  color: var(--accent-color);
  font-weight: 500;
}

.remove-btn {
  background: none;
  border: none;
  color: var(--error-color);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  font-size: 18px;
}

.remove-btn:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* Processing Options */
.processing-options {
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  background: var(--background-secondary);
}

.processing-options legend {
  font-weight: 600;
  color: var(--text-primary);
  padding: 0 var(--spacing-sm);
}

.options-grid {
  display: grid;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.option-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.checkbox-label:hover {
  background: var(--background-tertiary);
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-sm);
  position: relative;
  flex-shrink: 0;
  margin-top: 2px;
  transition: all var(--transition-fast);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
  background: var(--primary-color);
  border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 12px;
  font-weight: bold;
}

.option-content {
  flex: 1;
}

.option-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.option-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  outline: none;
  position: relative;
  overflow: hidden;
}

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

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  width: 100%;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

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

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

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

.btn-icon {
  font-size: 18px;
}

/* Processing Status */
.processing-status {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background: var(--background-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-primary);
}

/* Stored Stamps Info */
.stored-stamps-info {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background: var(--background-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-primary);
}

.stored-stamps-info h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.info-steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.info-step {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--background-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
}

.step-number {
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.info-step .step-content h4 {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.info-step .step-content p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.processing-status h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.status-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.status-step {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  background: var(--background-card);
  border: 1px solid var(--border-primary);
  opacity: 0.5;
  transition: all var(--transition-normal);
}

.status-step.active {
  opacity: 1;
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.05);
}

.step-icon {
  font-size: 24px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--background-tertiary);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.status-step.active .step-icon {
  background: var(--primary-color);
  color: white;
}

.step-content {
  flex: 1;
}

.step-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.step-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* Alert Messages */
.alert-container {
  margin-bottom: var(--spacing-lg);
}

.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  display: none;
  animation: slideIn var(--transition-normal);
}

.alert.show {
  display: block;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--success-color);
  color: #065f46;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error-color);
  color: #991b1b;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--warning-color);
  color: #92400e;
}

.alert-info {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid var(--primary-color);
  color: #3730a3;
}

/* Footer */
.dashboard-footer {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-primary);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-2xl);
  align-items: start;
}

.footer-section h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.footer-section p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 400px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  color: var(--primary-color);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.loading-overlay.show {
  opacity: 1;
  visibility: visible;
}

.loading-content {
  background: var(--background-card);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: var(--shadow-2xl);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-primary);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

.loading-text {
  font-size: var(--font-size-md);
  color: var(--text-primary);
  font-weight: 500;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-normal);
}

.skip-link:focus {
  top: 6px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .dashboard-container {
    padding: var(--spacing-md);
  }
  
  .header-content {
    flex-direction: column;
    text-align: center;
  }
  
  .logo-section {
    justify-content: center;
  }
  
  .tab-navigation {
    flex-direction: column;
  }
  
  .tab-panel {
    padding: var(--spacing-lg);
  }
  
  .panel-header h2 {
    font-size: var(--font-size-2xl);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .upload-area {
    padding: var(--spacing-lg);
  }
  
  .upload-icon {
    font-size: 36px;
  }
}

@media (max-width: 480px) {
  .dashboard-container {
    padding: var(--spacing-sm);
  }
  
  .tab-panel {
    padding: var(--spacing-md);
  }
  
  .btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-primary: #000000;
    --border-secondary: #000000;
    --text-secondary: #000000;
  }
}

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