:root {
  --bg: #0a0a0c;
  --bg-elevated: #111115;
  --bg-card: #16161a;
  --fg: #e8e6e1;
  --fg-muted: #8a8880;
  --accent: #c4f540;
  --accent-dim: #7d9e2a;
  --border: #2a2a30;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Courier New', monospace;
}

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

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

/* ---- Hero ---- */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 2rem 3rem;
  position: relative;
  background: linear-gradient(165deg, #0a0a0c 0%, #0f110a 40%, #0a0a0c 100%);
}

.hero-grid {
  max-width: 900px;
  margin: 0 auto;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.7;
}

.hero-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  max-width: 900px;
  margin: 4rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero-strip .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---- Problem ---- */
.problem {
  padding: 8rem 2rem;
  border-top: 1px solid var(--border);
}

.problem-layout {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  display: block;
  margin-bottom: 1.2rem;
}

.problem-left h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  position: sticky;
  top: 4rem;
}

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

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
}

.problem-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-dim);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.8rem;
}

.problem-card p {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* ---- Capabilities ---- */
.capabilities {
  padding: 8rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.capabilities h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 4rem;
}

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

.cap-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2.5rem;
  transition: border-color 0.2s;
}

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

.cap-icon {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--accent);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(196, 245, 64, 0.08);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.cap-item h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
}

.cap-item p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---- Numbers ---- */
.numbers {
  padding: 6rem 2rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.numbers-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.num-item {
  text-align: center;
}

.num-value {
  display: block;
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.num-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* ---- Closing ---- */
.closing {
  padding: 8rem 2rem;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.closing h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

.closing-sub {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ---- Footer ---- */
.site-footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

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

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .hero { padding: 4rem 1.5rem 2rem; min-height: 80vh; }
  .problem-layout { grid-template-columns: 1fr; gap: 2rem; }
  .problem-left h2 { position: static; }
  .cap-grid { grid-template-columns: 1fr; }
  .numbers-grid { grid-template-columns: 1fr 1fr; gap: 3rem 2rem; }
  .problem, .capabilities { padding: 5rem 1.5rem; }
  .closing { padding: 5rem 1.5rem; }
  .hero-strip { gap: 0.75rem; }
  .footer-inner { flex-direction: column; gap: 0.5rem; text-align: center; }
}