/* Intine Landing Page Styles */
/* Design System */

:root {
  /* Light Mode - Elegant Purple */
  --bg-primary: #ffffff;
  --bg-secondary: #faf8fc;
  --bg-card: #ffffff;
  --text-primary: #1a1523;
  --text-secondary: #5c5470;
  --text-muted: #9490a0;
  --accent: #7c3aed;
  --accent-glow: rgba(124, 58, 237, 0.12);
  --accent-hover: #6d28d9;
  --border: #e9e4f0;
  --success: #10b981;
  --gradient-start: #7c3aed;
  --gradient-end: #a78bfa;
  --card-shadow: 0 4px 24px rgba(124, 58, 237, 0.08);
  --hero-gradient: linear-gradient(135deg, #faf8fc 0%, #ffffff 100%);
}

[data-theme="dark"] {
  --bg-primary: #0c0a0f;
  --bg-secondary: #13111a;
  --bg-card: #1a1725;
  --text-primary: #f4f2f7;
  --text-secondary: #a8a3b3;
  --text-muted: #6b6678;
  --accent: #a78bfa;
  --accent-glow: rgba(167, 139, 250, 0.15);
  --accent-hover: #c4b5fd;
  --border: #2d2640;
  --success: #34d399;
  --gradient-start: #7c3aed;
  --gradient-end: #a78bfa;
  --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --hero-gradient: linear-gradient(135deg, #13111a 0%, #0c0a0f 100%);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

p {
  color: var(--text-secondary);
}

.mono {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

/* Layout */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  background-color: rgba(var(--bg-primary), 0.8);
}

[data-theme="dark"] .header {
  background-color: rgba(10, 10, 15, 0.85);
}

[data-theme="light"] .header {
  background-color: rgba(255, 255, 255, 0.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.logo span {
  color: var(--accent);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  color: var(--text-primary);
}

.sun-icon, .moon-icon {
  display: none;
}

[data-theme="dark"] .sun-icon {
  display: block;
}

[data-theme="light"] .moon-icon {
  display: block;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  background: var(--hero-gradient);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  border-radius: 100px;
  font-size: 0.875rem;
  color: var(--accent);
  margin-bottom: 2rem;
  font-weight: 500;
}

.badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

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

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #ffffff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

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

.btn-secondary:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

/* Problem Section */
.problem {
  background: var(--bg-secondary);
}

.problem-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.problem h2 {
  margin-bottom: 1.5rem;
}

.problem p {
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.problem-highlight {
  font-size: 1.25rem;
  color: var(--accent);
  font-weight: 500;
  font-style: italic;
  margin-top: 2rem;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: var(--accent);
  box-shadow: var(--card-shadow);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: 12px;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.feature-card h3 {
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.9375rem;
}

/* Comparison Section */
.comparison {
  background: var(--bg-primary);
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.comparison-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}

.comparison-card.highlight {
  border-color: var(--accent);
  position: relative;
  overflow: hidden;
}

.comparison-card.highlight::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
}

.comparison-card h3 {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.comparison-card h3 .x402-badge {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: 4px;
  font-weight: 600;
}

.comparison-list {
  list-style: none;
}

.comparison-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9375rem;
}

.comparison-list li:last-child {
  border-bottom: none;
}

.check {
  color: var(--success);
  font-weight: 600;
}

.cross {
  color: #ef4444;
  font-weight: 600;
}

/* Protocols Section */
.protocols {
  background: var(--bg-secondary);
}

/* Protocols Accordion */
.protocols-accordion {
  max-width: 800px;
  margin: 3rem auto 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.accordion-item.active {
  border-color: var(--accent);
  box-shadow: var(--card-shadow);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  gap: 1rem;
}

.accordion-header:hover {
  background: var(--accent-glow);
}

.accordion-title {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  text-align: left;
}

.protocol-badge {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 600;
  background: var(--accent-glow);
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
}

.accordion-subtitle {
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 500;
}

.accordion-icon {
  width: 24px;
  height: 24px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
  color: var(--accent);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out;
}

.accordion-item.active .accordion-content {
  max-height: 2000px;
  transition: max-height 0.5s ease-in;
}

.accordion-description {
  padding: 0 1.5rem 1rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* Code Block */
.code-block {
  margin: 0 1.5rem 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.code-language {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.copy-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--accent-glow);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.copy-button:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.copy-button svg {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.copy-button:hover svg {
  color: var(--accent);
}

.copy-text {
  color: var(--text-secondary);
}

.copy-button:hover .copy-text {
  color: var(--accent);
}

.code-block pre {
  margin: 0;
  padding: 1.25rem;
  overflow-x: auto;
  font-size: 0.8125rem;
  line-height: 1.6;
}

.code-block code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-wrap: break-word;
}

.code-instruction {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: var(--bg-card);
}

.code-instruction code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  background: var(--accent-glow);
  color: var(--accent);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.8125rem;
}

/* Pricing Section */
.pricing {
  background: var(--bg-primary);
  text-align: center;
}

.pricing-card {
  max-width: 480px;
  margin: 3rem auto 0;
  background: var(--bg-card);
  border: 2px solid var(--accent);
  border-radius: 20px;
  padding: 3rem;
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
}

.price {
  font-size: 4rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.price-unit {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

.price-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Status Section */
.status {
  background: var(--bg-secondary);
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.status-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 1.25rem;
}

.status-icon.live {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.status-icon.soon {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
}

.status-item h4 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

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

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.footer-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 500px;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

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

/* Responsive */
@media (max-width: 768px) {
  section {
    padding: 4rem 0;
  }

  .hero {
    min-height: auto;
    padding: 8rem 0 5rem;
  }

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

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .features-grid,
  .comparison-grid,
  .protocols-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card {
    padding: 2rem;
  }

  .price {
    font-size: 3rem;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }

  .protocols-accordion {
    margin-top: 2rem;
  }

  .accordion-header {
    padding: 1rem 1.25rem;
  }

  .accordion-subtitle {
    font-size: 1rem;
  }

  .code-block-header {
    padding: 0.5rem 0.75rem;
  }

  .code-language {
    font-size: 0.6875rem;
  }

  .copy-button {
    padding: 0.375rem 0.625rem;
    font-size: 0.75rem;
  }

  .copy-button svg {
    width: 14px;
    height: 14px;
  }

  .code-block pre {
    padding: 1rem;
    font-size: 0.75rem;
  }

  .code-block,
  .accordion-description {
    margin-left: 1.25rem;
    margin-right: 1.25rem;
  }
}

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

.animate-fade-in {
  animation: fadeInUp 0.6s ease-out forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }