:root {
  --bg: #0a0e17;
  --bg-elevated: #111827;
  --bg-card: #161e2e;
  --fg: #e8ecf1;
  --fg-muted: #8896ab;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --accent-secondary: #a78bfa;
  --border: rgba(255, 255, 255, 0.06);
  --radius: 16px;
  --radius-sm: 10px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.15;
}

/* ─── HERO ─── */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 80px 24px 60px;
  position: relative;
  background: radial-gradient(ellipse 80% 50% at 50% -10%, var(--accent-glow) 0%, transparent 70%);
}

.hero-badge {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  color: var(--fg);
  margin-bottom: 24px;
}

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

.lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero-visual {
  margin-top: 56px;
}

.scan-animation {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 28px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.point-cloud {
  display: grid;
  grid-template-columns: repeat(4, 10px);
  gap: 8px;
  padding: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--fg-muted);
  animation: pulse 2s ease-in-out infinite;
}

.dot.d1 { animation-delay: 0s; background: var(--accent); }
.dot.d2 { animation-delay: 0.15s; }
.dot.d3 { animation-delay: 0.3s; background: var(--accent); }
.dot.d4 { animation-delay: 0.45s; }
.dot.d5 { animation-delay: 0.6s; }
.dot.d6 { animation-delay: 0.75s; background: var(--accent); }
.dot.d7 { animation-delay: 0.9s; }
.dot.d8 { animation-delay: 1.05s; background: var(--accent-secondary); }

@keyframes pulse {
  0%, 100% { opacity: 0.4; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

.arrow-flow {
  font-size: 2rem;
  color: var(--accent);
  font-weight: 300;
  animation: flowRight 1.5s ease-in-out infinite;
}

@keyframes flowRight {
  0%, 100% { transform: translateX(0); opacity: 0.5; }
  50% { transform: translateX(6px); opacity: 1; }
}

.twin-box {
  width: 64px;
  height: 64px;
  border: 2px solid var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
}

.twin-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
}

/* ─── FEATURES ─── */
.features {
  padding: 100px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.features-header {
  text-align: center;
  margin-bottom: 56px;
}

.features-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 12px;
}

.features-header .sub {
  color: var(--fg-muted);
  font-size: 1.05rem;
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: border-color 0.3s, transform 0.3s;
}

.card:hover {
  border-color: rgba(56, 189, 248, 0.2);
  transform: translateY(-2px);
}

.card-large {
  grid-column: span 2;
  background: linear-gradient(145deg, var(--bg-card) 0%, rgba(56, 189, 248, 0.04) 100%);
}

.card-wide {
  grid-column: span 2;
}

.card-icon {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ─── METRICS ─── */
.metrics {
  padding: 80px 24px;
  background: var(--bg-elevated);
}

.metrics-inner {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  text-align: center;
}

.metric-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.metric-label {
  color: var(--fg-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ─── CLOSING ─── */
.closing {
  padding: 120px 24px;
  text-align: center;
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 20px;
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.closing-accent {
  color: var(--accent) !important;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 1.1rem !important;
  margin-top: 24px !important;
}

/* ─── FOOTER ─── */
.footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 4px;
}

.footer-tagline {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .feature-cards {
    grid-template-columns: 1fr;
  }
  .card-large, .card-wide {
    grid-column: span 1;
  }
  .metrics-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .scan-animation {
    padding: 20px 24px;
    gap: 20px;
  }
  .hero {
    min-height: auto;
    padding: 60px 20px 48px;
  }
}