:root {
  --bg: #0a0a0a;
  --bg-card: #111111;
  --bg-code: #0d1117;
  --text: #fafafa;
  --text-secondary: #888888;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --gradient: linear-gradient(135deg, #3b82f6, #8b5cf6);
  --border: rgba(255, 255, 255, 0.1);
  --radius: 12px;
  --max-width: 1200px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   Navbar
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  border-bottom-color: var(--border);
}

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

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.05em;
}

.lang-toggle:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.2);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font);
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.05);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.8125rem;
}

/* ========================================
   Hero
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.03) 0px, transparent 1px, transparent 60px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.03) 0px, transparent 1px, transparent 60px);
  mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black 20%, transparent 100%);
}

.hero-content {
  position: relative;
  text-align: center;
  z-index: 1;
}

.hero-title {
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, #ffffff 0%, #3b82f6 50%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

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

/* ========================================
   Sections — shared
   ======================================== */

section {
  padding: 120px 0;
}

.section-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  max-width: 600px;
  margin-bottom: 56px;
}

/* ========================================
   Cards — Auth Methods
   ======================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all 0.3s ease;
}

.card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.08);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent);
  margin-bottom: 20px;
}

.card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.5;
}

/* ========================================
   Features
   ======================================== */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.08);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ========================================
   Compliance
   ======================================== */

.compliance {
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.05) 0%, transparent 100%);
}

.compliance-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.compliance-text p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.compliance-text .section-title {
  margin-bottom: 24px;
}

.checklist {
  list-style: none;
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.checklist li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
  font-weight: 500;
}

.checklist svg {
  flex-shrink: 0;
}

/* Region map */

.region-map {
  position: relative;
}

.map-container {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.map-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.region-dot {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.region-dot.active::before {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.6);
}

.region-dot.future::before {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: transparent;
  border: 2px solid var(--text-secondary);
  opacity: 0.5;
}

.dot-pulse {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.6;
  }
  50% {
    transform: scale(2.5);
    opacity: 0;
  }
}

.dot-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.region-dot.active .dot-label {
  color: var(--text);
}

/* ========================================
   Developer
   ======================================== */

.dev-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  margin-top: 48px;
}

.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.code-dots {
  display: flex;
  gap: 8px;
}

.code-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.code-dots span:nth-child(1) {
  background: #ff5f56;
}

.code-dots span:nth-child(2) {
  background: #ffbd2e;
}

.code-dots span:nth-child(3) {
  background: #27c93f;
}

.code-lang {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.code-block pre {
  padding: 24px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: #e6edf3;
}

.code-block code {
  font-family: inherit;
}

.token-cmd {
  color: #7ee787;
}

.token-str {
  color: #ffa657;
}

.dev-bullets {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 12px;
}

.dev-bullet {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.dev-bullet svg {
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 2px;
}

.dev-bullet span {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
}

/* ========================================
   Pain Points
   ======================================== */

.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all 0.3s ease;
}

.pain-card:hover {
  border-color: rgba(239, 68, 68, 0.3);
  box-shadow: 0 0 40px rgba(239, 68, 68, 0.08);
}

.pain-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

/* ========================================
   Steps — How it works
   ======================================== */

.steps {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 48px 0;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 28px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s ease;
}

.step:hover {
  border-color: rgba(59, 130, 246, 0.3);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent);
  font-size: 1.125rem;
  font-weight: 700;
}

.step h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.step p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.step code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: rgba(59, 130, 246, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}

.code-note {
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.05) 0%, transparent 100%);
  padding: 120px 0;
}

.cta-container {
  text-align: center;
}

.cta-container .section-title {
  max-width: 600px;
  margin: 0 auto 40px;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.0625rem;
}

/* ========================================
   Footer
   ======================================== */

footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 40px;
}

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

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ========================================
   Scroll animations
   ======================================== */

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

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

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-actions .btn {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero-title {
    font-size: clamp(2.5rem, 12vw, 4.5rem);
  }

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

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

  .compliance-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  section {
    padding: 80px 0;
  }
}

@media (max-width: 480px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

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

  .code-block pre {
    font-size: 0.6875rem;
    padding: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-in { opacity: 1; transform: none; transition: none; }
  .card:hover { transform: none; }
  .region-dot { animation: none; }
}