/* Fact Checker AI - Landing Page Styles */

:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --secondary: #8b5cf6;
  --success: #22c55e;
  --warning: #eab308;
  --danger: #ef4444;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --gray-900: #111827;
  --gray-800: #1f2937;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-500: #6b7280;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --white: #ffffff;
  
  --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --shadow: 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);
  
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--dark);
  color: var(--gray-100);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 18px;
}

.btn-block {
  width: 100%;
}

.btn .icon {
  width: 20px;
  height: 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
}

.logo-icon {
  font-size: 24px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--gray-300);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--white);
}

.nav-links .btn {
  margin-left: 16px;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--white);
}

/* Hero Section */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content .badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 100px;
  font-size: 14px;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--white) 0%, var(--gray-300) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--gray-400);
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-note {
  font-size: 14px;
  color: var(--gray-500);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background: 
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
}

/* Browser Mockup */
.browser-mockup {
  background: var(--dark-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.browser-header {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  background: var(--gray-800);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.browser-content {
  padding: 24px;
}

.demo-post {
  display: flex;
  gap: 12px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.demo-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient);
}

.demo-name {
  font-weight: 600;
  margin-bottom: 4px;
}

.demo-content {
  color: var(--gray-400);
  font-size: 14px;
}

.demo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
}

.demo-badge.credible {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.demo-tooltip {
  background: var(--gray-800);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 13px;
}

.tooltip-title {
  font-weight: 600;
  margin-bottom: 12px;
}

.demo-tooltip ul {
  list-style: none;
}

.demo-tooltip li {
  padding: 4px 0;
}

.demo-tooltip li.positive { color: var(--success); }
.demo-tooltip li.neutral { color: var(--gray-500); }

/* Social Proof */
.social-proof {
  padding: 40px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.social-proof .container {
  text-align: center;
}

.social-proof p {
  color: var(--gray-500);
  margin-bottom: 24px;
}

.logos {
  display: flex;
  justify-content: center;
  gap: 48px;
}

.logos span {
  color: var(--gray-600);
  font-weight: 500;
}

/* Sections */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 18px;
  color: var(--gray-400);
}

/* Features */
.features {
  padding: 100px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  padding: 32px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--gray-400);
  font-size: 15px;
}

/* How It Works */
.how-it-works {
  padding: 100px 0;
  background: var(--dark-light);
}

.steps {
  display: flex;
  justify-content: center;
  gap: 60px;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 300px;
}

.step-number {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  border-radius: 50%;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

.step h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.step p {
  color: var(--gray-400);
}

/* Demo Section */
.demo-section {
  padding: 100px 0;
}

.demo-content {
  text-align: center;
}

.demo-content h2 {
  font-size: 40px;
  margin-bottom: 16px;
}

.demo-content > p {
  color: var(--gray-400);
  margin-bottom: 48px;
}

.demo-examples {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.example-card {
  padding: 24px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: left;
}

.example-score {
  font-size: 48px;
  font-weight: 800;
}

.example-card.high .example-score { color: var(--success); }
.example-card.medium .example-score { color: var(--warning); }
.example-card.low .example-score { color: var(--danger); }

.example-label {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
}

.example-card.high .example-label { color: var(--success); }
.example-card.medium .example-label { color: var(--warning); }
.example-card.low .example-label { color: var(--danger); }

.example-text {
  color: var(--gray-400);
  font-size: 14px;
  margin-bottom: 16px;
  min-height: 40px;
}

.example-signals {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.signal {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
}

.signal.positive { color: var(--success); }
.signal.warning { color: var(--warning); }
.signal.negative { color: var(--danger); }
.signal.neutral { color: var(--gray-500); }

/* Pricing */
.pricing {
  padding: 100px 0;
  background: var(--dark-light);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.pricing-card {
  position: relative;
  padding: 40px;
  background: var(--dark);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
}

.pricing-card.featured {
  border-color: var(--primary);
  transform: scale(1.05);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 20px;
  background: var(--gradient);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
}

.pricing-header {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pricing-header h3 {
  font-size: 24px;
  margin-bottom: 8px;
}

.price {
  font-size: 48px;
  font-weight: 800;
}

.price span {
  font-size: 18px;
  font-weight: 400;
  color: var(--gray-500);
}

.pricing-header p {
  color: var(--gray-500);
  margin-top: 8px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 8px 0;
  color: var(--gray-300);
}

.pricing-features li.disabled {
  color: var(--gray-600);
}

/* FAQ */
.faq {
  padding: 100px 0;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.faq-item {
  padding: 24px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-item h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.faq-item p {
  color: var(--gray-400);
  font-size: 15px;
}

.faq-item a {
  color: var(--primary);
}

/* Download */
.download {
  padding: 100px 0;
  background: var(--gradient);
  text-align: center;
}

.download h2 {
  font-size: 40px;
  margin-bottom: 16px;
}

.download > .container > p {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 48px;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 32px;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 32px;
  background: var(--white);
  color: var(--dark);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: transform 0.2s;
}

.download-btn:hover {
  transform: translateY(-4px);
}

.download-btn svg {
  width: 40px;
  height: 40px;
}

.download-label {
  display: block;
  font-size: 13px;
  color: var(--gray-600);
}

.download-browser {
  display: block;
  font-size: 20px;
  font-weight: 700;
}

.download-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  opacity: 0.9;
}

.download-note .icon {
  width: 20px;
  height: 20px;
}

/* Footer */
.footer {
  padding: 80px 0 40px;
  background: var(--gray-900);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--gray-500);
  margin-top: 16px;
  max-width: 300px;
}

.footer-links h4 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-400);
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  color: var(--gray-500);
  text-decoration: none;
  padding: 6px 0;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--white);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: var(--gray-600);
  font-size: 14px;
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-links a {
  color: var(--gray-500);
  text-decoration: none;
  font-weight: 500;
}

.social-links a:hover {
  color: var(--white);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
  }
  
  .hero-image {
    display: none;
  }
  
  .features-grid,
  .pricing-grid,
  .demo-examples {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .features-grid,
  .pricing-grid,
  .faq-grid,
  .demo-examples {
    grid-template-columns: 1fr;
  }
  
  .steps {
    flex-direction: column;
    gap: 40px;
  }
  
  .download-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* Disclaimer Section */
.disclaimer-section {
  padding: 60px 0;
  background: linear-gradient(135deg, rgba(251, 191, 36, 0.05) 0%, rgba(251, 191, 36, 0.02) 100%);
  border-top: 1px solid rgba(251, 191, 36, 0.1);
  border-bottom: 1px solid rgba(251, 191, 36, 0.1);
}

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

.disclaimer-box h3 {
  font-size: 24px;
  color: #fbbf24;
  margin-bottom: 16px;
}

.disclaimer-box > p {
  color: var(--gray-300);
  margin-bottom: 32px;
}

.disclaimer-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: left;
  margin-bottom: 32px;
}

.disclaimer-point {
  display: flex;
  gap: 12px;
  padding: 20px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.disclaimer-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.disclaimer-point strong {
  color: var(--gray-200);
  display: block;
  margin-bottom: 4px;
}

.disclaimer-point p {
  font-size: 13px;
  color: var(--gray-400);
  margin: 0;
  line-height: 1.5;
}

.disclaimer-footer {
  color: #a3e635 !important;
  font-size: 14px;
  padding: 16px 24px;
  background: rgba(163, 230, 53, 0.1);
  border-radius: 8px;
  display: inline-block;
}

@media (max-width: 768px) {
  .disclaimer-points {
    grid-template-columns: 1fr;
  }
}