/* LeanBackAI - Modern Dark Theme with Purple/Indigo Gradients */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a24;
  --bg-card-hover: #222230;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7b;
  --accent-primary: #8b5cf6;
  --accent-secondary: #6366f1;
  --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #6366f1 50%, #4f46e5 100%);
  --accent-gradient-soft: linear-gradient(135deg, rgba(139, 92, 246, 0.2) 0%, rgba(99, 102, 241, 0.2) 100%);
  --success: #22c55e;
  --warning: #f59e0b;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
}

* {
  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-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--text-primary);
}

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

.section {
  padding: 100px 0;
}

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

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.125rem;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background: var(--accent-gradient);
  border-radius: 8px;
  color: white !important;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform 0.3s ease;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(139, 92, 246, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--accent-gradient-soft);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent-primary);
  margin-bottom: 24px;
}

.hero h1 {
  margin-bottom: 24px;
}

.hero h1 span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(139, 92, 246, 0.5);
  color: white;
}

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

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

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Problem/Solution Section */
.problem-solution {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.problem-card, .solution-card {
  padding: 40px;
}

.problem-card {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.05) 100%);
  border-color: rgba(239, 68, 68, 0.2);
}

.solution-card {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(34, 197, 94, 0.05) 100%);
  border-color: rgba(34, 197, 94, 0.2);
}

.problem-card h3, .solution-card h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.problem-card ul, .solution-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.problem-card li, .solution-card li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
}

.problem-card li::before {
  content: '✕';
  color: #ef4444;
  font-weight: bold;
}

.solution-card li::before {
  content: '✓';
  color: #22c55e;
  font-weight: bold;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  text-align: center;
  padding: 40px 24px;
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient-soft);
  border-radius: 16px;
  font-size: 28px;
}

.feature-card h4 {
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
}

/* Pricing Cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.popular {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: white;
  padding: 6px 20px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-header {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.pricing-tier {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}

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

.pricing-features {
  flex: 1;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.pricing-features li::before {
  content: '✓';
  color: var(--success);
  font-weight: bold;
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  padding: 32px;
}

.testimonial-quote {
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.testimonial-info h5 {
  margin-bottom: 2px;
  font-size: 1rem;
}

.testimonial-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* Steps / How It Works */
.steps-container {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 32px;
  position: relative;
  padding-bottom: 48px;
}

.step:last-child {
  padding-bottom: 0;
}

.step::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 60px;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.step:last-child::before {
  display: none;
}

.step-number {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  border-radius: 50%;
  font-size: 1.25rem;
  font-weight: 700;
}

.step-content {
  flex: 1;
  padding-top: 8px;
}

.step-content h4 {
  margin-bottom: 8px;
}

.step-content p {
  margin: 0;
}

/* CTA Section */
.cta-section {
  text-align: center;
  background: var(--accent-gradient-soft);
  border-radius: var(--border-radius-lg);
  padding: 80px 40px;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
}

.cta-section > * {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  margin-bottom: 16px;
}

.cta-section p {
  max-width: 500px;
  margin: 0 auto 32px;
  font-size: 1.125rem;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 0.95rem;
}

.footer-column h5 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.footer-column ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-column a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-column a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* FAQ Accordion */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
}

.faq-question {
  width: 100%;
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--accent-primary);
}

.faq-icon {
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer p {
  padding-bottom: 24px;
}

/* Add-ons Table */
.addons-table {
  width: 100%;
  border-collapse: collapse;
  margin: 40px 0;
}

.addons-table th,
.addons-table td {
  padding: 20px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.addons-table th {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.addons-table td {
  color: var(--text-secondary);
}

.addons-table tr:hover td {
  background: var(--bg-card);
}

.addons-table .addon-name {
  color: var(--text-primary);
  font-weight: 600;
}

.addons-table .addon-price {
  color: var(--accent-primary);
  font-weight: 700;
}

/* About Page */
.about-hero {
  padding: 160px 0 100px;
  text-align: center;
}

.about-hero p {
  max-width: 700px;
  margin: 0 auto;
  font-size: 1.25rem;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.value-card {
  padding: 40px;
}

.value-card h4 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.trust-signals {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.trust-item {
  padding: 32px;
}

.trust-number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.trust-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Timeline */
.timeline {
  max-width: 600px;
  margin: 0 auto;
}

.timeline-item {
  display: flex;
  gap: 24px;
  padding-bottom: 40px;
  position: relative;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 40px;
  bottom: 0;
  width: 2px;
  background: var(--accent-gradient);
}

.timeline-item:last-child::before {
  display: none;
}

.timeline-marker {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.timeline-content h4 {
  margin-bottom: 4px;
}

.timeline-content .timeline-date {
  color: var(--accent-primary);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
}

/* Use Cases Preview */
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.use-case-card {
  padding: 32px;
}

.use-case-card h4 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.use-case-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-gradient-soft);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-top: 16px;
}

/* Responsive */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .trust-signals {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-secondary);
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-cta {
    display: none;
  }
  
  .problem-solution,
  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .values-grid,
  .use-cases-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .step {
    gap: 20px;
  }
  
  .trust-signals {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .card {
    padding: 24px;
  }
  
  .trust-signals {
    grid-template-columns: 1fr;
  }
}