:root {
  --bg: #0d0d0d;
  --surface: #141414;
  --surface-2: #1c1c1c;
  --fg: #f5f5f5;
  --fg-muted: #8a8a8a;
  --accent: #c8f245;
  --accent-dim: rgba(200, 242, 69, 0.12);
  --border: rgba(255,255,255,0.07);
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.5px;
  color: var(--fg);
}

.nav-badge {
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(200, 242, 69, 0.2);
  padding: 4px 10px;
  border-radius: 100px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Hero */
.hero {
  padding: 100px 48px 80px;
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 32px;
}

.hero-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(52px, 8vw, 96px);
  line-height: 1.02;
  letter-spacing: -3px;
  color: var(--fg);
  margin-bottom: 32px;
  max-width: 680px;
}

.hero-sub {
  font-size: 20px;
  color: var(--fg-muted);
  max-width: 520px;
  line-height: 1.65;
  margin-bottom: 56px;
}

.hero-metrics {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  width: fit-content;
  background: var(--surface);
}

.metric {
  padding: 20px 32px;
}

.metric-value {
  display: block;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 28px;
  color: var(--accent);
  letter-spacing: -1px;
}

.metric-label {
  display: block;
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 2px;
}

.metric-divider {
  width: 1px;
  height: 60px;
  background: var(--border);
}

/* Loop section */
.loop {
  padding: 80px 48px;
  border-top: 1px solid var(--border);
}

.loop-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 40px;
}

.loop-diagram {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.loop-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  min-width: 100px;
}

.loop-node-accent {
  border-color: rgba(200, 242, 69, 0.3);
  background: var(--accent-dim);
}

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

.loop-node span {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-muted);
}

.loop-arrow {
  color: var(--fg-muted);
  flex-shrink: 0;
}

.loop-sub {
  font-size: 15px;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.65;
}

/* Features */
.features {
  padding: 80px 48px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  max-width: 960px;
}

.feature-card {
  padding: 36px;
  background: var(--bg);
  border-radius: 0;
  border: 1px solid var(--border);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border: 1px solid rgba(200, 242, 69, 0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
}

.feature-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.feature-desc {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* How section */
.how {
  padding: 80px 48px;
  border-top: 1px solid var(--border);
}

.how-tag {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.how-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  letter-spacing: -1px;
  color: var(--fg);
  max-width: 680px;
  margin-bottom: 48px;
}

.comparison {
  display: flex;
  gap: 0;
  max-width: 900px;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.comp-side {
  flex: 1;
  padding: 32px;
}

.comp-old {
  background: var(--surface);
}

.comp-new {
  background: var(--accent-dim);
  border-left: 1px solid var(--border);
}

.comp-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 20px;
}

.comp-new .comp-label {
  color: var(--accent);
}

.comp-list {
  list-style: none;
}

.comp-list li {
  font-size: 14px;
  color: var(--fg-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.comp-list li:last-child {
  border-bottom: none;
}

.comp-new .comp-list li {
  color: var(--fg);
}

.comp-divider {
  width: 1px;
  background: var(--border);
  flex-shrink: 0;
}

/* Closing */
.closing {
  padding: 120px 48px;
  border-top: 1px solid var(--border);
}

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

.closing-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.1;
  letter-spacing: -2px;
  color: var(--fg);
  margin-bottom: 24px;
}

.closing-sub {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
}

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

.footer-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 16px;
  color: var(--fg);
}

.footer-tagline {
  font-size: 13px;
  color: var(--fg-muted);
  font-style: italic;
}

/* Mobile */
@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .hero { padding: 64px 24px 56px; }
  .hero-headline { font-size: 44px; letter-spacing: -1.5px; }
  .hero-sub { font-size: 16px; }
  .hero-metrics { flex-direction: column; width: 100%; }
  .metric { padding: 16px 20px; }
  .metric-divider { width: 100%; height: 1px; }
  .loop { padding: 56px 24px; }
  .loop-diagram { flex-direction: column; align-items: flex-start; }
  .loop-arrow { transform: rotate(90deg); }
  .features { padding: 56px 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .how { padding: 56px 24px; }
  .comparison { flex-direction: column; }
  .comp-new { border-left: none; border-top: 1px solid var(--border); }
  .closing { padding: 80px 24px; }
  .footer { padding: 24px; }
}