/* Base Sound App Dashboard Styles */
/* Modern music learning-focused interface */

:root {
  /* Brand Colors */
  --primary-color: #4a9eff;
  --primary-dark: #2d7dd2;
  --secondary-color: #ff6b6b;
  --accent-color: #ffd93d;
  --success-color: #6bcf7f;
  --warning-color: #ffa726;
  --error-color: #f44336;
  
  /* Neutral Colors */
  --dark-bg: #0a0a0b;
  --dark-surface: #1a1a1c;
  --dark-card: #2a2a2c;
  --dark-border: #3a3a3c;
  --text-primary: #ffffff;
  --text-secondary: #b8b8b8;
  --text-muted: #888888;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #4a9eff 0%, #2d7dd2 100%);
  --gradient-secondary: linear-gradient(135deg, #ff6b6b 0%, #ff5252 100%);
  --gradient-success: linear-gradient(135deg, #6bcf7f 0%, #4caf50 100%);
  --gradient-dark: linear-gradient(135deg, #1a1a1c 0%, #0a0a0b 100%);
  --gradient-surface: linear-gradient(135deg, #2a2a2c 0%, #1a1a1c 100%);
  
  /* Spacing */
  --border-radius: 12px;
  --border-radius-large: 20px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  /* Shadows */
  --shadow-small: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-large: 0 20px 60px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 20px rgba(74, 158, 255, 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--dark-bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1400px;
  margin: 0 auto;
}

/* Header */
header {
  background: var(--gradient-dark);
  border-bottom: 2px solid var(--dark-border);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-medium);
}

.logo-container {
  margin-bottom: var(--spacing-md);
}

.logo-container a {
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo-container svg {
  color: var(--primary-color);
  transition: transform 0.3s ease;
}

.logo-container a:hover svg {
  transform: scale(1.05);
}

.logo-container p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: var(--spacing-sm);
}

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

.about-btn {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
  font-weight: 600;
}

.about-btn:hover {
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

/* Learning Goals Section */
.learning-goals {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  margin: var(--spacing-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-medium);
}

.goals-container h3 {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.learning-badges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.learning-badge {
  background: var(--dark-card);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: all 0.3s ease;
  cursor: pointer;
}

.learning-badge:hover {
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.badge-icon {
  font-size: 1.5rem;
  width: 40px;
  text-align: center;
}

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

/* Sidebar */
.sidebar {
  position: fixed;
  right: 0;
  top: 0;
  width: 300px;
  height: 100vh;
  background: var(--gradient-surface);
  border-left: 2px solid var(--dark-border);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 1000;
  overflow-y: auto;
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-header {
  background: var(--dark-card);
  border-bottom: 2px solid var(--dark-border);
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-header h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
}

.refresh-btn {
  background: var(--gradient-primary);
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.refresh-btn:hover {
  transform: rotate(180deg) scale(1.1);
  box-shadow: var(--shadow-glow);
}

.files-list {
  padding: var(--spacing-lg);
}

.loading-files {
  text-align: center;
  color: var(--text-secondary);
  padding: var(--spacing-xl);
}

/* Main Content */
main {
  flex: 1;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 600px;
}

/* Drop Zone */
.drop-zone {
  background: var(--gradient-surface);
  border: 3px dashed var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl) * 2;
  text-align: center;
  max-width: 600px;
  width: 100%;
  transition: all 0.3s ease;
  cursor: pointer;
}

.drop-zone:hover {
  border-color: var(--primary-color);
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
}

.drop-zone.dragover {
  border-color: var(--success-color);
  background: linear-gradient(135deg, 
    rgba(107, 207, 127, 0.1) 0%, 
    rgba(76, 175, 80, 0.1) 100%);
  transform: scale(1.02);
}

.drop-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}

.upload-icon {
  font-size: 4rem;
  opacity: 0.7;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.drop-content h3 {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.browse-btn {
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--border-radius);
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.browse-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.analysis-options {
  background: var(--dark-card);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  width: 100%;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
}

.checkbox-label input {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-color);
}

.separation-note {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
  text-align: left;
}

.file-types {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Loading Spinner */
.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl) * 2;
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  max-width: 600px;
  width: 100%;
}

.spinner {
  width: 60px;
  height: 60px;
  border: 4px solid var(--dark-border);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.progress-section {
  width: 100%;
  text-align: center;
}

.progress-status {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.progress-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.progress-bar-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.progress-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  min-width: 140px;
  text-align: right;
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--dark-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-percent {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
  min-width: 50px;
}

.progress-message {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Results Container */
.results-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

.results-container h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.result-card {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all 0.3s ease;
}

.result-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-5px);
  box-shadow: var(--shadow-large);
}

.result-card h3 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.result-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-color);
}

/* Educational Section */
.educational-section {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.educational-section h3 {
  text-align: center;
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.theory-insights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.insight-card {
  background: var(--dark-card);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
}

.insight-card:hover {
  border-color: var(--secondary-color);
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

.insight-card h4 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.insight-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.tutorial-link {
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.tutorial-link:hover {
  color: var(--accent-color);
  text-decoration: underline;
}

/* Waveform Section */
.waveform-section {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.waveform-section h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.waveform-container {
  background: var(--dark-bg);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
}

.waveform-display {
  height: 200px;
  background: linear-gradient(135deg, #000 0%, #111 100%);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
}

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

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

.control-btn {
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--border-radius);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.control-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.time-display {
  color: var(--text-secondary);
  font-family: 'Courier New', monospace;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.color-box {
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

.color-box.intro { background: #ff6b6b; }
.color-box.verse { background: #4ecdc4; }
.color-box.chorus { background: #45b7d1; }
.color-box.bridge { background: #f9ca24; }
.color-box.outro { background: #a55eea; }
.color-box.prechorus { background: #26de81; }
.color-box.instrumental { background: #fd79a8; }
.color-box.buildup { background: #fdcb6e; }

/* Structure Section */
.structure-section {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.structure-section h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.structure-timeline {
  height: 60px;
  background: var(--dark-bg);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
}

/* Stems Section */
.stems-section {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.stems-section h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

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

.stem-control {
  background: var(--dark-card);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
}

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

.stem-header label {
  font-weight: 600;
  color: var(--text-primary);
}

.stem-buttons {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.stem-btn {
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--border-radius);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.8rem;
}

.stem-btn:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-small);
}

.volume-slider {
  width: 80px;
  accent-color: var(--primary-color);
}

.stem-waveform-container {
  margin-top: var(--spacing-md);
}

.stem-waveform {
  height: 60px;
  background: var(--dark-bg);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
}

.stems-master-controls {
  background: var(--dark-bg);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.master-btn {
  background: var(--gradient-success);
  border: none;
  border-radius: var(--border-radius);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.master-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

/* Actions */
.actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-xl);
}

.actions button {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.primary-action {
  background: var(--gradient-primary);
  color: white;
  font-size: 1.1rem;
  padding: var(--spacing-lg) var(--spacing-xl);
  box-shadow: var(--shadow-medium);
}

.primary-action:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

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

.re-analyze-btn {
  background: var(--gradient-surface);
  color: var(--text-primary);
  border: 2px solid var(--dark-border);
}

.analyze-another-btn {
  background: var(--gradient-secondary);
  color: white;
}

.actions button:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

/* Error Message */
.error-message {
  background: var(--gradient-secondary);
  border: 2px solid var(--error-color);
  border-radius: var(--border-radius);
  color: white;
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  text-align: center;
  font-weight: 600;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: var(--spacing-lg);
}

.modal-content {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-large);
}

.modal-header {
  background: var(--dark-card);
  border-bottom: 2px solid var(--dark-border);
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 2rem;
  cursor: pointer;
  transition: color 0.3s ease;
}

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

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

.creator-section, .about-section {
  margin-bottom: var(--spacing-xl);
}

.creator-section h3, .about-section h3 {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.creator-section p, .about-section p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.creator-section a, .about-section a {
  color: var(--primary-color);
  text-decoration: none;
}

.creator-section a:hover, .about-section a:hover {
  text-decoration: underline;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.feature-item {
  background: var(--dark-card);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
}

.feature-item h4 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

.experiment-note {
  background: var(--dark-card);
  border: 2px solid var(--accent-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.experiment-note p {
  color: var(--text-secondary);
  font-style: italic;
  text-align: center;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .container {
    margin: 0 var(--spacing-md);
  }
  
  .results-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
  
  .theory-insights {
    grid-template-columns: 1fr;
  }
  
  .waveform-controls {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 768px) {
  .learning-badges {
    grid-template-columns: 1fr;
  }
  
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .actions {
    flex-direction: column;
    align-items: center;
  }
  
  .sidebar {
    width: 100%;
  }
  
  .stems-master-controls {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    margin: 0 var(--spacing-sm);
  }
  
  header {
    padding: var(--spacing-md);
  }
  
  main {
    padding: var(--spacing-md);
  }
  
  .drop-zone {
    padding: var(--spacing-xl);
  }
  
  .results-grid {
    grid-template-columns: 1fr;
  }
  
  .modal {
    padding: var(--spacing-sm);
  }
  
  .modal-content {
    max-height: 95vh;
  }
  
  .modal-body {
    padding: var(--spacing-lg);
  }
}

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

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
  40%, 43% { transform: translate3d(0, -30px, 0); }
  70% { transform: translate3d(0, -15px, 0); }
  90% { transform: translate3d(0,-4px,0); }
}

/* Utility Classes */
.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.slide-in {
  animation: slideIn 0.4s ease-out;
}

.bounce {
  animation: bounce 2s ease-in-out infinite;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visible { display: block !important; }

/* Selection Styling */
::selection {
  background: rgba(74, 158, 255, 0.3);
  color: white;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--dark-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

/* ===== AUTHENTICATION STYLES ===== */
.auth-container {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.auth-card {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  width: 100%;
  max-width: 450px;
  box-shadow: var(--shadow-large);
  position: relative;
  overflow: hidden;
}

.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

.auth-card h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.auth-subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  font-size: 1rem;
}

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

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.form-group label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-group input {
  padding: var(--spacing-md);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius);
  background: var(--dark-bg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.form-help {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

.checkbox-group {
  flex-direction: row !important;
  align-items: center;
  gap: var(--spacing-sm) !important;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
}

.auth-submit-btn {
  background: var(--gradient-primary);
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: var(--spacing-md);
}

.auth-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.auth-links {
  text-align: center;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--dark-border);
}

.auth-links a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

.auth-links a:hover {
  text-decoration: underline;
}

/* Flash Messages */
.flash-messages {
  margin-bottom: var(--spacing-lg);
}

.flash-message {
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.flash-success {
  background: rgba(107, 207, 127, 0.1);
  border: 1px solid var(--success-color);
  color: var(--success-color);
}

.flash-error {
  background: rgba(244, 67, 54, 0.1);
  border: 1px solid var(--error-color);
  color: var(--error-color);
}

.flash-info {
  background: rgba(74, 158, 255, 0.1);
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
}

/* Header Authentication Buttons */
.user-welcome {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-right: var(--spacing-sm);
}

.login-btn, .register-btn, .dashboard-btn, .logout-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.login-btn {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--dark-border);
}

.login-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

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

.register-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

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

.dashboard-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 20px rgba(107, 207, 127, 0.3);
}

.logout-btn {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--dark-border);
}

.logout-btn:hover {
  border-color: var(--error-color);
  color: var(--error-color);
}

/* ===== DASHBOARD STYLES ===== */
.dashboard-header {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.dashboard-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

.dashboard-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.dashboard-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-lg);
}

.dashboard-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-lg);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-color);
  display: block;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: var(--spacing-xs);
}

.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.file-card {
  background: var(--gradient-surface);
  border: 2px solid var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.file-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-large);
  border-color: var(--primary-color);
}

.file-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
}

.file-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.file-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.file-info h3 {
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.file-meta {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.file-status {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-top: var(--spacing-sm);
}

.status-completed {
  background: rgba(107, 207, 127, 0.2);
  color: var(--success-color);
}

.status-processing {
  background: rgba(255, 167, 38, 0.2);
  color: var(--warning-color);
}

.status-pending {
  background: rgba(74, 158, 255, 0.2);
  color: var(--primary-color);
}

.status-failed {
  background: rgba(244, 67, 54, 0.2);
  color: var(--error-color);
}

.file-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--dark-border);
}

.action-btn {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  text-align: center;
  display: inline-block;
}

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

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

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

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

.upload-section {
  background: var(--gradient-surface);
  border: 2px dashed var(--dark-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  transition: all 0.3s ease;
}

.upload-section:hover {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, rgba(74, 158, 255, 0.05) 0%, rgba(45, 125, 210, 0.05) 100%);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.7;
}

.upload-text {
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.upload-subtext {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.empty-state {
  text-align: center;
  padding: var(--spacing-xl) 0;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.5;
}

.empty-state h3 {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* Responsive Design for Auth & Dashboard */
@media (max-width: 768px) {
  .auth-card {
    margin: var(--spacing-md);
    padding: var(--spacing-lg);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .dashboard-stats {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .file-grid {
    grid-template-columns: 1fr;
  }
  
  .header-actions {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
  
  .user-welcome {
    width: 100%;
    text-align: center;
    margin-bottom: var(--spacing-sm);
  }
  
  .dashboard-title {
    font-size: 2rem;
  }
  
  .file-actions {
    flex-direction: column;
  }
}