:root {
  --bg: #0a0a0a;
  --bg-elevated: #111111;
  --bg-card: #161616;
  --fg: #e8e8e8;
  --fg-muted: #888888;
  --accent: #c8ff00;
  --accent-dim: rgba(200, 255, 0, 0.12);
  --green: #00ff88;
  --red: #ff4444;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Space Grotesk', -apple-system, sans-serif;
  --max-w: 1100px;
  --section-pad: clamp(60px, 10vw, 120px) clamp(20px, 5vw, 40px);
}

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

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

/* === HERO === */
.hero {
  padding: clamp(80px, 15vw, 160px) clamp(20px, 5vw, 40px) clamp(60px, 10vw, 100px);
  position: relative;
  overflow: hidden;
}

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

.hero-grid {
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero-badge {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 4px;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
  max-width: 800px;
}

.hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--fg-muted);
  max-width: 640px;
  line-height: 1.7;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
}

.stat-label {
  display: block;
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 6px;
  line-height: 1.4;
}

.stat-divider {
  width: 1px;
  height: 50px;
  background: rgba(255,255,255,0.1);
}

/* === PROOF === */
.proof {
  padding: var(--section-pad);
  background: var(--bg-elevated);
}

.proof-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.proof-label,
.playbooks-label,
.diff-label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.proof h2,
.playbooks h2,
.difference h2 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  max-width: 700px;
}

.proof-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.proof-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 32px;
}

.proof-icon {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 16px;
}

.proof-card p {
  color: var(--fg-muted);
  font-size: 15px;
  line-height: 1.7;
}

/* === PLAYBOOKS === */
.playbooks {
  padding: var(--section-pad);
}

.playbooks-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

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

@media (max-width: 700px) {
  .playbook-grid {
    grid-template-columns: 1fr;
  }
}

.playbook-item {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 36px;
  transition: border-color 0.2s;
}

.playbook-item:hover {
  border-color: var(--accent);
}

.playbook-tag {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 2px;
  background: var(--accent-dim);
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 16px;
}

.playbook-item h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.2;
}

.playbook-item p {
  color: var(--fg-muted);
  font-size: 15px;
  line-height: 1.7;
}

/* === DIFFERENCE === */
.difference {
  padding: var(--section-pad);
  background: var(--bg-elevated);
}

.diff-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.diff-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.diff-item {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 28px 32px;
}

.diff-compare {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.diff-old,
.diff-new {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 15px;
}

.diff-old {
  color: var(--fg-muted);
  text-decoration: line-through;
  text-decoration-color: rgba(255,68,68,0.4);
}

.diff-x {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--red);
  background: rgba(255,68,68,0.12);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  flex-shrink: 0;
}

.diff-new {
  color: var(--fg);
  font-weight: 500;
}

.diff-check {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
  background: rgba(0,255,136,0.12);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  flex-shrink: 0;
}

/* === CLOSING === */
.closing {
  padding: clamp(80px, 12vw, 140px) clamp(20px, 5vw, 40px);
  text-align: center;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}

.closing-badge {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 28px;
}

.closing h2 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.closing-text {
  font-size: clamp(16px, 2vw, 18px);
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto;
}

/* === FOOTER === */
.site-footer {
  padding: 48px clamp(20px, 5vw, 40px);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}

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

/* === MOBILE === */
@media (max-width: 600px) {
  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  .stat-divider {
    width: 60px;
    height: 1px;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}