:root {
  --bg: #0a0e17;
  --bg-card: #111827;
  --bg-elevated: #1a2235;
  --fg: #e2e8f0;
  --fg-muted: #94a3b8;
  --accent: #06d6a0;
  --accent-dim: rgba(6, 214, 160, 0.15);
  --accent-glow: rgba(6, 214, 160, 0.3);
  --border: rgba(148, 163, 184, 0.1);
  --font-main: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Fira Code', monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.35rem 0.85rem;
  border-radius: 2px;
  margin-bottom: 1.5rem;
}

/* ===== HERO ===== */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6rem 8% 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  max-width: 640px;
  z-index: 2;
}

.hero-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.4rem 1rem;
  border-radius: 2px;
  display: inline-block;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 480px;
  line-height: 1.7;
}

.hero-visual {
  position: relative;
  width: 300px;
  height: 300px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pulse-ring {
  position: absolute;
  width: 200px;
  height: 200px;
  border: 1px solid var(--accent-glow);
  border-radius: 50%;
  animation: pulse-expand 3s ease-out infinite;
}

.pulse-ring.delay-1 {
  animation-delay: 1s;
}

.pulse-ring.delay-2 {
  animation-delay: 2s;
}

@keyframes pulse-expand {
  0% {
    transform: scale(0.5);
    opacity: 0.8;
  }
  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}

.status-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  background: var(--bg-card);
  border: 1px solid var(--accent-glow);
  padding: 0.5rem 1.2rem;
  border-radius: 4px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.live-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ===== PROBLEM ===== */
.problem {
  padding: 6rem 8%;
  border-top: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.problem-left h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.problem-right {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.5rem 2rem;
}

.problem-stat {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

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

/* ===== FEATURES ===== */
.features {
  padding: 6rem 8%;
  border-top: 1px solid var(--border);
}

.features h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
}

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

.feature-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2rem;
  transition: border-color 0.3s ease;
}

.feature-block:hover {
  border-color: var(--accent-glow);
}

.feature-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}

.feature-block h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.7rem;
  letter-spacing: -0.01em;
}

.feature-block p {
  color: var(--fg-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ===== METRICS ===== */
.metrics {
  padding: 4rem 8%;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.metrics-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 3rem;
}

.metric {
  text-align: center;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 0.3rem;
}

.metric-divider {
  width: 1px;
  height: 50px;
  background: var(--border);
}

/* ===== CLOSING ===== */
.closing {
  padding: 8rem 8%;
  text-align: center;
}

.closing h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.closing-text {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 3rem 8%;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    padding: 4rem 6% 3rem;
    min-height: auto;
    gap: 3rem;
  }

  .hero-visual {
    width: 200px;
    height: 200px;
  }

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

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

  .metrics-inner {
    flex-direction: column;
    gap: 2rem;
  }

  .metric-divider {
    width: 60px;
    height: 1px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}