:root {
  --bg: #0a0b0d;
  --bg-elevated: #111318;
  --bg-card: #161920;
  --fg: #e8e9ed;
  --fg-muted: #8b8f9a;
  --accent: #3bf0a5;
  --accent-dim: rgba(59, 240, 165, 0.12);
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(59, 240, 165, 0.2);
  --font-body: 'Space Grotesk', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SF Mono', monospace;
  --max-w: 1120px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

.mono { font-family: var(--font-mono); }

/* ── Hero ─────────────────────────── */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 80px 40px 60px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 20% 60%, rgba(59, 240, 165, 0.04) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 30%, rgba(59, 240, 165, 0.03) 0%, transparent 70%),
    var(--bg);
}

.hero-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.hero-label {
  font-size: 14px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

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

.lede {
  font-size: 19px;
  color: var(--fg-muted);
  max-width: 580px;
  line-height: 1.6;
  margin-bottom: 48px;
}

.hero-stat-row {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.stat-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 28px;
  min-width: 160px;
}

.stat-number {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.stat-desc {
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

/* ── Problem ──────────────────────── */
.problem {
  padding: 120px 40px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

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

.section-label {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.problem h2, .how h2, .capabilities h2, .closing h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

.problem h2 em {
  font-style: normal;
  color: var(--accent);
}

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

.problem-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px;
}

.problem-title {
  font-weight: 600;
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--fg);
}

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

/* ── How ──────────────────────────── */
.how {
  padding: 120px 40px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
}

.how-lede {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 640px;
  margin-bottom: 56px;
  line-height: 1.65;
}

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

.step {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
}

.step:first-child {
  border-top: 1px solid var(--border);
}

.step-num {
  font-size: 14px;
  color: var(--accent);
  flex-shrink: 0;
  width: 40px;
  padding-top: 4px;
}

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

.step-content p {
  font-size: 15px;
  color: var(--fg-muted);
  max-width: 520px;
}

/* ── Capabilities ─────────────────── */
.capabilities {
  padding: 120px 40px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.cap-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 36px;
  transition: border-color 0.3s var(--ease);
}

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

.cap-icon {
  font-size: 22px;
  color: var(--accent);
  background: var(--accent-dim);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  margin-bottom: 20px;
}

.cap-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

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

/* ── Closing ──────────────────────── */
.closing {
  padding: 140px 40px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  text-align: center;
}

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

.closing-block h2 {
  margin-bottom: 24px;
}

.closing-block p {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.closing-tagline {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-top: 36px;
}

/* ── Footer ───────────────────────── */
.site-footer {
  padding: 32px 40px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-left {
  font-size: 14px;
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-left .mono {
  color: var(--fg);
  font-weight: 600;
}

.footer-sep {
  opacity: 0.3;
}

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

/* ── Responsive ───────────────────── */
@media (max-width: 768px) {
  .hero { padding: 60px 24px 40px; min-height: 80vh; }
  .problem, .how, .capabilities, .closing { padding: 80px 24px; }
  .problem-grid { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: 1fr; }
  .hero-stat-row { flex-direction: column; gap: 16px; }
  .stat-chip { min-width: unset; }
  .step { flex-direction: column; gap: 12px; }
  .step-num { width: auto; }
  .site-footer { padding: 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero { padding: 48px 20px 32px; }
  .problem, .how, .capabilities, .closing { padding: 60px 20px; }
  .lede { font-size: 17px; }
}