:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #16161f;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --fg-dim: #55556a;
  --accent: #00ff88;
  --accent-dim: rgba(0, 255, 136, 0.15);
  --accent-glow: rgba(0, 255, 136, 0.4);
  --accent-secondary: #ff6b35;
  --border: #1e1e2e;
  --font-body: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* === HERO === */
.hero {
  position: relative;
  padding: 140px 0 100px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.3;
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid rgba(0, 255, 136, 0.2);
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(48px, 8vw, 80px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 24px;
}

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

.lede {
  font-size: 19px;
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  max-width: 500px;
}

.stat-number {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--fg);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 13px;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* === PROBLEM === */
.problem {
  padding: 100px 0;
}

.problem h2,
.features h2,
.how h2 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}

.problem-card.highlighted {
  background: var(--accent-dim);
  border-color: rgba(0, 255, 136, 0.3);
}

.problem-icon {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

.problem-card.highlighted .problem-icon {
  color: var(--accent);
}

.problem-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.problem-card p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* === FEATURES === */
.features {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.section-lede {
  font-size: 18px;
  color: var(--fg-muted);
  margin-bottom: 56px;
  max-width: 550px;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.feature-row {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.feature-row:last-child {
  border-bottom: none;
}

.feature-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--accent);
  min-width: 80px;
  padding-top: 4px;
}

.feature-content h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-content p {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 520px;
}

/* === HOW === */
.how {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.how h2 {
  margin-bottom: 56px;
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 24px;
}

.how-step {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 24px 0;
}

.step-line {
  position: absolute;
  left: -18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.how-step:first-child .step-line {
  top: 50%;
}

.step-line.last {
  bottom: 50%;
}

.step-dot {
  position: absolute;
  left: -24px;
  top: 32px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--border);
  z-index: 1;
}

.step-dot.active {
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 12px var(--accent-glow);
}

.step-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 4px;
}

.step-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
}

.step-content p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 480px;
}

/* === CLOSING === */
.closing {
  position: relative;
  padding: 120px 0;
  text-align: center;
  overflow: hidden;
}

.closing-glow {
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  opacity: 0.2;
  pointer-events: none;
}

.closing h2 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.closing-text {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto 16px;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* === FOOTER === */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

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

.footer-brand {
  font-size: 18px;
  font-weight: 600;
}

.footer-tagline {
  font-size: 14px;
  color: var(--fg-dim);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero {
    padding: 100px 0 60px;
  }

  .hero h1 {
    letter-spacing: -1px;
  }

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

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .stat-divider {
    display: none;
  }

  .feature-row {
    flex-direction: column;
    gap: 8px;
  }

  .feature-tag {
    min-width: auto;
  }

  .how-steps {
    padding-left: 20px;
  }

  .footer-content {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .problem,
  .features,
  .how {
    padding: 60px 0;
  }

  .closing {
    padding: 80px 0;
  }
}