/* ====================================
   Consumer Complaint Pathfinder - CSS
   Dark Theme Design System
   ==================================== */

/* CSS Custom Properties (Variables) */
:root {
  /* Colors */
  --bg-primary: #0F172A;
  --surface-dark: #111827;
  --card-bg: #1F2937;
  --text-primary: #FFFFFF;
  --text-secondary: #E5E7EB;
  --text-muted: #9CA3AF;
  --accent-blue: #38BDF8;
  --success-green: #22C55E;
  --warning-yellow: #F59E0B;
  --error-red: #EF4444;
  --muted: #6B7280;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --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);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  font-size: var(--font-size-base);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #0EA5E9;
  text-decoration: underline;
}

/* Buttons */
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  min-height: 48px;
  min-width: 120px;
}

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

.cta-button.primary {
  background-color: var(--accent-blue);
  color: var(--bg-primary);
}

.cta-button.primary:hover:not(:disabled) {
  background-color: #0EA5E9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
  background-color: var(--surface-dark);
  color: var(--text-primary);
  border: 1px solid var(--muted);
}

.cta-button.secondary:hover:not(:disabled) {
  background-color: var(--card-bg);
  border-color: var(--accent-blue);
}

.cta-button.ghost {
  background-color: transparent;
  color: var(--text-muted);
  border: 1px solid var(--muted);
}

.cta-button.ghost:hover:not(:disabled) {
  background-color: var(--surface-dark);
  color: var(--text-primary);
}

/* Header */
.header {
  background-color: var(--surface-dark);
  border-bottom: 1px solid #374151;
  padding: var(--spacing-md) 0;
}

.header-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.brand-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin: 0;
}

@media (min-width: 768px) {
  .header-content {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  
  .brand-title {
    font-size: var(--font-size-2xl);
  }
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--surface-dark) 100%);
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.hero-content {
  max-width: 600px;
  margin: 0 auto;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.hero-description {
  font-size: var(--font-size-base);
  color: var(--text-muted);
  margin-bottom: var(--spacing-xl);
}

@media (max-width: 767px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-base);
  }
}

/* Main Content */
.main-content {
  padding: var(--spacing-2xl) 0;
  min-height: 60vh;
}

.step-section {
  max-width: 800px;
  margin: 0 auto;
}

.step-title {
  text-align: center;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.step-description {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* Problem Grid */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 640px) {
  .problem-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .problem-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.problem-card {
  background-color: var(--card-bg);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: left;
  position: relative;
  overflow: hidden;
}

.problem-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-blue);
}

.problem-card.selected {
  border-color: var(--accent-blue);
  background-color: rgba(56, 189, 248, 0.1);
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-blue), var(--success-green));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.problem-card.selected::before {
  opacity: 1;
}

.problem-icon {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-sm);
  display: block;
}

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

.problem-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.problem-examples {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-style: italic;
}

/* Filters */
.filters-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.filter-group {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 1px solid #374151;
}

.filter-label {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.filter-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.filter-options {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
}

@media (min-width: 640px) {
  .filter-options {
    grid-template-columns: repeat(2, 1fr);
  }
}

.filter-option {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  border: 1px solid #4B5563;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  background-color: var(--surface-dark);
}

.filter-option:hover {
  border-color: var(--accent-blue);
  background-color: rgba(56, 189, 248, 0.05);
}

.filter-option.selected {
  border-color: var(--accent-blue);
  background-color: rgba(56, 189, 248, 0.1);
}

.filter-option input[type="radio"] {
  margin-right: var(--spacing-sm);
  width: 16px;
  height: 16px;
  accent-color: var(--accent-blue);
}

.filter-option-text {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.filters-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
}

@media (min-width: 640px) {
  .filters-actions {
    flex-direction: row;
    justify-content: center;
  }
}

/* Results */
.results-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.result-section {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border-left: 4px solid var(--accent-blue);
}

.result-section.case-yes {
  border-left-color: var(--success-green);
}

.result-section.case-partial {
  border-left-color: var(--warning-yellow);
}

.result-section.case-no {
  border-left-color: var(--error-red);
}

.result-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.result-content {
  color: var(--text-secondary);
  line-height: 1.7;
}

.case-status {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.case-status.yes {
  background-color: rgba(34, 197, 94, 0.2);
  color: var(--success-green);
}

.case-status.partial {
  background-color: rgba(245, 158, 11, 0.2);
  color: var(--warning-yellow);
}

.case-status.no {
  background-color: rgba(239, 68, 68, 0.2);
  color: var(--error-red);
}

.forum-list, .compensation-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.forum-item, .compensation-item {
  background-color: var(--surface-dark);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  border: 1px solid #374151;
}

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

.forum-details, .compensation-details {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.evidence-list, .mistakes-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.evidence-item, .mistake-item {
  background-color: var(--surface-dark);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  border-left: 3px solid var(--accent-blue);
}

.evidence-item strong, .mistake-item strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.evidence-importance {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-left: var(--spacing-xs);
}

.evidence-importance.essential {
  background-color: var(--error-red);
  color: white;
}

.evidence-importance.very-important {
  background-color: var(--warning-yellow);
  color: var(--bg-primary);
}

.evidence-importance.important {
  background-color: var(--accent-blue);
  color: var(--bg-primary);
}

.evidence-importance.moderate {
  background-color: var(--muted);
  color: white;
}

.results-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
  margin-top: var(--spacing-xl);
}

@media (min-width: 640px) {
  .results-actions {
    flex-direction: row;
    justify-content: center;
  }
}

/* Loading */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--surface-dark);
  border-top: 4px solid var(--accent-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-md);
}

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

.loading-overlay p {
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
}

/* Disclaimer */
.disclaimer {
  background-color: var(--surface-dark);
  border-top: 1px solid #374151;
  padding: var(--spacing-xl) 0;
}

.disclaimer-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.disclaimer h3 {
  color: var(--warning-yellow);
  margin-bottom: var(--spacing-sm);
}

.disclaimer p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* Footer */
.footer {
  background-color: var(--surface-dark);
  border-top: 1px solid #374151;
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.footer-content p {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-xs);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.5s ease-out;
}

/* Responsive Design Improvements */
@media (max-width: 640px) {
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .main-content {
    padding: var(--spacing-xl) 0;
  }
  
  .step-section {
    margin: 0 var(--spacing-sm);
  }
  
  .cta-button {
    width: 100%;
    max-width: 300px;
  }
  
  .problem-card {
    padding: var(--spacing-sm);
  }
  
  .filter-group {
    padding: var(--spacing-sm);
  }
  
  .result-section {
    padding: var(--spacing-sm);
  }
}

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

.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;
}

/* Focus Styles */
.cta-button:focus,
.problem-card:focus,
.filter-option:focus {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .header,
  .hero,
  .filters-actions,
  .results-actions,
  .footer {
    display: none;
  }
  
  .main-content {
    padding: 0;
  }
  
  .step-section {
    max-width: none;
  }
  
  .result-section {
    break-inside: avoid;
    margin-bottom: var(--spacing-md);
  }
}