:root {
  --bg-primary: #0a0c10;
  --bg-secondary: #12151c;
  --bg-card: #181c25;
  --bg-highlight: #1a2233;
  --fg-primary: #e8eaf0;
  --fg-secondary: #8b92a5;
  --fg-muted: #545b6e;
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent-warm: #f59e0b;
  --border: #1e2330;
  --border-accent: rgba(59, 130, 246, 0.3);
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

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

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

.section-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 20px;
  text-transform: uppercase;
}

/* ---- HERO ---- */
.hero {
  padding: 120px 0 80px;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 700px;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-secondary);
  max-width: 580px;
  line-height: 1.65;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 24px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  max-width: fit-content;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--fg-primary);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

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

/* ---- PROBLEM ---- */
.problem {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.problem h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  max-width: 550px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.2s;
}

.problem-card:hover {
  border-color: var(--border-accent);
}

.problem-icon {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 20px;
  opacity: 0.7;
}

.problem-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--fg-primary);
}

.problem-card p {
  font-size: 0.95rem;
  color: var(--fg-secondary);
  line-height: 1.6;
}

/* ---- HOW IT WORKS ---- */
.how {
  padding: 100px 0;
  background: var(--bg-primary);
}

.how h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
  max-width: 550px;
}

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

.flow-step {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  padding: 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.flow-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  flex-shrink: 0;
}

.flow-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.flow-content p {
  font-size: 0.95rem;
  color: var(--fg-secondary);
  line-height: 1.6;
}

.flow-connector {
  width: 1px;
  height: 24px;
  background: var(--border-accent);
  margin-left: 54px;
}

/* ---- TIERS ---- */
.tiers {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.tiers h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

.tier-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.tier-card {
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
}

.tier-highlight {
  border-color: var(--border-accent);
  background: var(--bg-highlight);
}

.tier-badge {
  position: absolute;
  top: -12px;
  left: 32px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--bg-primary);
  background: var(--accent);
  padding: 4px 12px;
  border-radius: 100px;
}

.tier-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.tier-desc {
  font-size: 0.95rem;
  color: var(--fg-secondary);
  line-height: 1.6;
  margin-bottom: 28px;
}

.tier-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tier-features li {
  font-size: 0.9rem;
  color: var(--fg-secondary);
  padding-left: 24px;
  position: relative;
}

.tier-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  opacity: 0.6;
}

.tier-highlight .tier-features li::before {
  opacity: 1;
}

/* ---- CLOSING ---- */
.closing {
  padding: 100px 0;
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
}

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

.closing h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.closing p {
  font-size: 1.05rem;
  color: var(--fg-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

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

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

.footer-brand {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

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

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    padding: 80px 0 60px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
    width: 100%;
    align-items: flex-start;
  }

  .stat-divider {
    width: 100%;
    height: 1px;
  }

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

  .flow-step {
    flex-direction: column;
    gap: 16px;
  }

  .flow-connector {
    margin-left: 20px;
  }

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

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

  section {
    padding: 60px 0;
  }

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