:root {
  --bg: #0a0f1a;
  --bg-elevated: #111827;
  --bg-card: #151d2e;
  --fg: #e2e8f0;
  --fg-muted: #8b95a8;
  --fg-dim: #4a5568;
  --accent: #00E599;
  --accent-dim: rgba(0, 229, 153, 0.15);
  --accent-glow: rgba(0, 229, 153, 0.3);
  --red-muted: #ef4444;
  --red-dim: rgba(239, 68, 68, 0.15);
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-w: 1100px;
  --px: 24px;
}

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

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

/* === HERO === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px var(--px) 60px;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.grid-line {
  position: absolute;
  background: var(--fg-dim);
  opacity: 0.08;
}

.gl-1 { left: 20%; top: 0; bottom: 0; width: 1px; }
.gl-2 { left: 40%; top: 0; bottom: 0; width: 1px; }
.gl-3 { left: 60%; top: 0; bottom: 0; width: 1px; }
.gl-4 { left: 80%; top: 0; bottom: 0; width: 1px; }
.gl-h1 { top: 33%; left: 0; right: 0; height: 1px; }
.gl-h2 { top: 66%; left: 0; right: 0; height: 1px; }

.hero-pin {
  margin-bottom: 32px;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hero-content {
  text-align: center;
  max-width: 720px;
  z-index: 1;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 20px;
  font-weight: 500;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* === HERO CTA === */
.hero-cta {
  display: flex;
  justify-content: center;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #0a0f1a;
  text-decoration: none;
  border-radius: 10px;
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition: opacity 0.15s, transform 0.1s, box-shadow 0.2s;
  box-shadow: 0 0 32px var(--accent-glow);
}

.cta-btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 4px 40px var(--accent-glow);
}

/* === DEMO BOX === */
.hero-demo {
  margin-top: 48px;
  width: 100%;
  max-width: 680px;
  z-index: 1;
}

.demo-box {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-elevated);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 28px 32px;
}

.demo-input, .demo-output {
  flex: 1;
}

.demo-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
  margin-bottom: 8px;
  font-weight: 500;
}

.demo-input code {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 4px;
}

.demo-radius {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-dim);
}

.demo-arrow {
  flex-shrink: 0;
}

.demo-addresses {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.demo-addresses span {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.demo-more {
  color: var(--accent) !important;
  font-weight: 500;
}

/* === HOW === */
.how {
  padding: 120px var(--px);
  max-width: var(--max-w);
  margin: 0 auto;
}

.how h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 64px;
}

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

.step {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  flex-shrink: 0;
  width: 80px;
  opacity: 0.6;
}

.step-content h3 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  color: var(--fg-muted);
  font-size: 1rem;
  max-width: 480px;
}

/* === FEATURES === */
.features {
  padding: 100px var(--px);
  max-width: var(--max-w);
  margin: 0 auto;
}

.features-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
  max-width: 600px;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: 16px;
  padding: 36px 32px;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(0, 229, 153, 0.2);
}

.fc-large {
  grid-column: 1 / -1;
}

.feature-icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* === COMPARISON === */
.comparison {
  padding: 100px var(--px);
  max-width: var(--max-w);
  margin: 0 auto;
}

.comparison h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  text-align: center;
}

.compare-grid {
  display: flex;
  align-items: stretch;
  gap: 0;
  border-radius: 16px;
  overflow: hidden;
}

.compare-col {
  flex: 1;
  padding: 40px 36px;
}

.compare-old {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.05);
  border-right: none;
  border-radius: 16px 0 0 16px;
}

.compare-new {
  background: var(--accent-dim);
  border: 1px solid rgba(0, 229, 153, 0.2);
  border-left: none;
  border-radius: 0 16px 16px 0;
}

.compare-vs {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--fg-dim);
  background: var(--bg-elevated);
  padding: 0 16px;
  letter-spacing: 0.05em;
}

.compare-header {
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.compare-old .compare-header { color: var(--fg-muted); }
.compare-new .compare-header { color: var(--accent); }

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

.compare-col li {
  font-size: 0.95rem;
  color: var(--fg-muted);
  padding-left: 20px;
  position: relative;
}

.compare-old li::before {
  content: '\00D7';
  position: absolute;
  left: 0;
  color: var(--red-muted);
  font-weight: 600;
}

.compare-new li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}

/* === CLOSING === */
.closing {
  padding: 120px var(--px);
  text-align: center;
}

.closing-content {
  max-width: 640px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

/* === FOOTER === */
.site-footer {
  padding: 40px var(--px);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-content {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-logo {
  font-weight: 700;
  font-size: 1.1rem;
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-dim);
  margin-left: 16px;
}

.footer-meta {
  font-size: 0.8rem;
  color: var(--fg-dim);
}

/* === MOBILE === */
@media (max-width: 768px) {
  .demo-box {
    flex-direction: column;
    text-align: center;
    padding: 24px 20px;
  }

  .demo-arrow { transform: rotate(90deg); }

  .step {
    flex-direction: column;
    gap: 12px;
  }

  .step-num {
    font-size: 2rem;
    width: auto;
  }

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

  .fc-large {
    grid-column: 1;
  }

  .compare-grid {
    flex-direction: column;
  }

  .compare-old {
    border-right: 1px solid rgba(255,255,255,0.05);
    border-bottom: none;
    border-radius: 16px 16px 0 0;
  }

  .compare-new {
    border-left: 1px solid rgba(0, 229, 153, 0.2);
    border-top: none;
    border-radius: 0 0 16px 16px;
  }

  .compare-vs {
    padding: 12px 0;
  }

  .footer-content {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .footer-tagline {
    margin-left: 0;
    display: block;
    margin-top: 4px;
  }
}