/* Layout & Responsive Grid System */

/* Navigation Header */
.nav-header {
  background: var(--color-bg-dark);
  border-bottom: 1px solid var(--color-border-dark);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-medium), border-color var(--transition-medium);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: 600;
  color: var(--color-text-dark);
  text-decoration: none;
}

.nav-logo img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-dark);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.theme-toggle {
  background: var(--color-surface-dark);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  cursor: pointer;
  font-size: var(--text-small);
  color: var(--color-text-dark);
  transition: border-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-primary);
}

/* Mobile menu toggle (hidden on desktop) */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-dark);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 60px 0 40px;
  background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-surface-dark) 100%);
}

.hero .display {
  margin-bottom: var(--spacing-lg);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero .subheadline {
  font-size: var(--text-body-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.6;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Section Layouts */
section {
  padding: 50px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 30px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-h1);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

.section-description {
  font-size: var(--text-body-lg);
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  align-items: start;
}

/* Screenshots Section */
.screenshots-section {
  background: var(--color-surface-dark);
  padding: 40px 0 50px;
}

.screenshots-container {
  max-width: 1000px;
  margin: 0 auto;
}

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

/* Footer */
.footer {
  background: var(--color-surface-dark);
  border-top: 1px solid var(--color-border-dark);
  padding: calc(var(--spacing-section) / 2) 0 var(--spacing-xl);
  margin-top: var(--spacing-section);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-dark);
  color: var(--color-text-muted);
  font-size: var(--text-small);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-top: var(--spacing-md);
}

.social-links a {
  color: var(--color-text-muted);
  font-size: 1.5rem;
  transition: color var(--transition-fast);
}

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

/* Legal Pages */
.legal-page {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-section) var(--spacing-lg);
}

.legal-page h1 {
  font-family: var(--font-heading);
  font-size: var(--text-h1);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

.legal-meta {
  color: var(--color-text-muted);
  font-size: var(--text-small);
  margin-bottom: var(--spacing-xl);
  font-style: italic;
}

.legal-page h2 {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  margin-top: calc(var(--spacing-xl) * 2);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

.legal-page h3 {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-dark);
}

.legal-page p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-muted);
  line-height: 1.8;
}

.legal-page ul, .legal-page ol {
  margin-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-muted);
}

.legal-page li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

.legal-page strong {
  color: var(--color-text-dark);
}

/* Responsive Breakpoints */

/* Tablet: 900px - 1200px */
@media (min-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero .display {
    font-size: 2.5rem;
  }
  
  .carousel {
    max-width: 360px;
  }
  
  .carousel-slide img {
    max-height: 700px;
  }
}

/* Desktop: > 1200px */
@media (min-width: 1200px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(5, 1fr);
  }
  
  .hero .display {
    font-size: 3rem;
  }
  
  section {
    padding: 70px 0;
  }
  
  .hero {
    padding: 80px 0 50px;
  }
  
  .screenshots-section {
    padding: 50px 0 60px;
  }
  
  .carousel {
    max-width: 380px;
  }
  
  .carousel-slide img {
    max-height: 750px;
  }
}

/* Mobile: < 900px */
@media (max-width: 899px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface-dark);
    border-bottom: 1px solid var(--color-border-dark);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero .display {
    font-size: 1.75rem;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .cta-buttons .btn {
    width: 100%;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .carousel {
    max-width: 280px;
  }
  
  .carousel-slide img {
    max-height: 550px;
  }
}

/* Animation Classes */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }