/* ===================================
   Digital Shadow Landing Page Styles
   =================================== */

/* CSS Variables for theming */
:root {
  /* Light theme (default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --accent-primary: #0d9488;
  --accent-secondary: #14b8a6;
  --accent-gradient: linear-gradient(135deg, #0d9488 0%, #14b8a6 50%, #2dd4bf 100%);
  --shadow-sm: 0 1px 2px 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);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
}

/* Dark theme */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  /* Lighter teal for dark backgrounds — maintains contrast and vibrancy */
  --accent-primary: #2dd4bf;
  --accent-secondary: #5eead4;
  --accent-gradient: linear-gradient(135deg, #14b8a6 0%, #2dd4bf 50%, #5eead4 100%);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography — L6: DM Sans for headings, more distinctive than Inter */
h1, h2, h3, h4, h5, h6 {
  font-family: 'DM Sans', 'Inter', system-ui, sans-serif;
  font-weight: 600;
  line-height: 1.2;
}

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

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

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

.btn-secondary:hover {
  background: var(--bg-secondary);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

.btn-block {
  width: 100%;
}

/* Text link CTA — secondary action that doesn't compete with primary button */
.btn-text-link {
  display: inline-flex;
  align-items: center;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 1.125rem;
  text-decoration: none;
  transition: color 0.2s ease;
  padding: 1rem 0.5rem;
}

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s ease;
}

[data-theme="dark"] .navbar {
  background: rgba(15, 23, 42, 0.8);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

/* App logo image in navbar and footer */
.logo-img {
  height: 2rem;
  width: 2rem;
  border-radius: 0.375rem;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a:not(.btn) {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:not(.btn):hover {
  color: var(--text-primary);
}

/* Theme toggle button */
#theme-toggle {
  position: relative;
  padding: 0.5rem;
  width: 2.5rem;
  height: 2.5rem;
}

.theme-icon-light,
.theme-icon-dark {
  position: absolute;
  transition: opacity 0.2s ease;
}

.theme-icon-dark {
  opacity: 0;
}

[data-theme="dark"] .theme-icon-light {
  opacity: 0;
}

[data-theme="dark"] .theme-icon-dark {
  opacity: 1;
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 4rem;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem;
  flex-direction: column;
  gap: 1rem;
  z-index: 999;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  padding: 0.75rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.mobile-menu a:hover {
  background: var(--bg-secondary);
}

/* Mobile theme toggle — matches nav link style */
.mobile-theme-toggle {
  padding: 0.75rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  border: none;
  background: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

.mobile-theme-toggle:hover {
  background: var(--bg-secondary);
}

/* Hero Section */
.hero {
  padding: 8rem 0 4rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 540px;
}

/* L10: Stats above CTA — add bottom margin to stats, remove from CTA */
.hero-stats {
  display: flex;
  gap: 3rem;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Hero Visual / Mockup */
.hero-visual {
  position: relative;
}

.mockup-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-xl);
}

.mockup-chat {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chat-bubble {
  max-width: 85%;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
}

.chat-bubble.user {
  align-self: flex-end;
  background: var(--accent-gradient);
  color: white;
}

.chat-bubble.assistant {
  align-self: flex-start;
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.processing-tag {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-primary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* Memory query tag — emerald to distinguish from capture */
.processing-tag.memory {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

/* Section Styles */
section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-top: 1rem;
}

/* Features Section */
.features {
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.3s ease;
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
}

.feature-card.featured {
  grid-column: span 1;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
  border-color: rgba(99, 102, 241, 0.2);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.feature-list {
  list-style: none;
  margin-top: 1rem;
}

.feature-list li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

/* How It Works Section */
.how-it-works {
  background: var(--bg-primary);
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 220px;
}

.step-number {
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 1rem;
}

.step-content h3 {
  margin-bottom: 0.5rem;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.step-arrow {
  font-size: 2rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

/* Demo Section */
.demo {
  background: var(--bg-secondary);
}

.demo-placeholder {
  max-width: 800px;
  margin: 0 auto;
  aspect-ratio: 16/9;
  background: var(--bg-tertiary);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--text-muted);
}

.play-button {
  width: 5rem;
  height: 5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  color: white;
  font-size: 2rem;
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.play-button:hover {
  transform: scale(1.1);
}

/* Use Cases Section */
.use-cases {
  background: var(--bg-primary);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.use-case {
  padding: 1.5rem;
  border-left: 3px solid var(--accent-primary);
  background: var(--bg-secondary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.use-case h3 {
  margin-bottom: 0.5rem;
}

.use-case p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Pricing Section */
.pricing {
  background: var(--bg-secondary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 1px var(--accent-primary);
}

.popular-badge {
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: white;
  padding: 0.25rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.pricing-header {
  text-align: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.pricing-header h3 {
  margin-bottom: 0.5rem;
}

.price {
  font-size: 3rem;
  font-weight: 700;
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  padding: 0.75rem 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Privacy Section — expanded trust block */
.privacy-section {
  background: var(--bg-secondary);
  padding: 5rem 0;
}

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}

.privacy-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  text-align: center;
  transition: box-shadow 0.2s ease;
}

.privacy-card:hover {
  box-shadow: var(--shadow-md);
}

.privacy-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.privacy-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.privacy-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* CTA Section */
.cta {
  background: var(--bg-primary);
  text-align: center;
  padding: 6rem 0;
}

.cta h2 {
  margin-bottom: 1rem;
}

.cta p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 1rem;
  font-size: 0.9375rem;
}

.footer-links h4 {
  margin-bottom: 1rem;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.footer-links a {
  display: block;
  padding: 0.5rem 0;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ===================================
   Responsive Styles
   =================================== */

/* Tablet */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    order: 1;
  }

  .hero-visual {
    order: 2;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .feature-card.featured {
    grid-column: span 1;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding: 6rem 0 3rem;
    min-height: auto;
  }

  /* Keep stats in a row on mobile, just tighter spacing */
  .hero-stats {
    justify-content: center;
    gap: 1.5rem;
  }

  .steps {
    flex-direction: column;
    align-items: center;
  }

  .step {
    max-width: 100%;
  }

  .step-arrow {
    transform: rotate(90deg);
    margin: 0.5rem 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  section {
    padding: 3rem 0;
  }

  .section-header {
    margin-bottom: 2rem;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }

  .mockup-container {
    padding: 1rem;
  }

  .chat-bubble {
    max-width: 95%;
  }
}

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

.hero-content,
.hero-visual {
  animation: fadeInUp 0.6s ease-out;
}

.hero-visual {
  animation-delay: 0.2s;
}

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

  html {
    scroll-behavior: auto;
  }
}