:root {
  --bg: #07090f;
  --surface: #0d1117;
  --surface2: #161b22;
  --border: #21262d;
  --text: #e6edf3;
  --text-muted: #7d8590;
  --accent: #ed4746;
  --accent-dim: rgba(237, 71, 70, 0.12);
  --green: #3fb950;
  --red: #f85149;
  --amber: #d29922;
  --font-head: 'Syne', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Fira Code', monospace;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

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

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

/* NAV */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
}
.nav-brand {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
.nav-os {
  color: var(--accent);
  margin-left: 1px;
}
.nav-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* HERO */
.hero {
  padding: 80px 48px 64px;
  border-bottom: 1px solid var(--border);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: start;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.hero-headline {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 32px;
  line-height: 1.7;
}

/* CODE BLOCK */
.hero-code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.code-file {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}
.hero-code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.8;
}
.code-keyword { color: #ff7b72; }
.code-string { color: #a5d6ff; }
.code-comment { color: var(--text-muted); }
.code-fn { color: #d2a8ff; }
.code-var { color: #79c0ff; }
.code-num { color: #f2cc60; }
.code-live-indicator {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}
.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}
.live-metric {
  color: var(--green);
  font-weight: 500;
}
.live-label {
  color: var(--text-muted);
  opacity: 0.6;
}

/* STAT CARDS */
.hero-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 8px;
}
.hero-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.stat-name {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.stat-value {
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--red);
  letter-spacing: -0.04em;
}
.stat-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}
.hero-stat-1 .stat-value { color: var(--red); }
.hero-stat-2 .stat-value { color: var(--green); }
.stat-breakdown {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.breakdown-row {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ACCOUNTANT */
.accountant {
  padding: 64px 48px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.accountant-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.accountant-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.accountant-quote {
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text);
}
.accountant-example {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}
.example-customer { margin-bottom: 20px; }
.example-name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.example-cost {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.example-loss {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.example-breakdown { display: flex; flex-direction: column; gap: 0; }
.breakdown-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.breakdown-item:last-child { border-bottom: none; }
.breakdown-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.breakdown-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
}
.breakdown-revenue .breakdown-value { color: var(--green); }
.breakdown-cost .breakdown-value { color: var(--red); }
.breakdown-net .breakdown-value { color: var(--amber); }

/* MARGIN REPORT */
.marginreport {
  padding: 64px 48px;
  border-bottom: 1px solid var(--border);
}
.marginreport-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 12px;
  max-width: 600px;
}
.section-sub {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.7;
}
.margin-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.margin-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.margin-card-icon {
  color: var(--accent);
  margin-bottom: 14px;
}
.margin-card-title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.margin-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.customer-tiers { margin-top: 8px; }
.tier-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  font-style: italic;
}
.tier-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.tier-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.tier-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.tier-profitable .tier-dot { background: #238636; }
.tier-comfortable .tier-dot { background: #3fb950; }
.tier-thin .tier-dot { background: #d29922; }
.tier-marginal .tier-dot { background: #f0883e; }
.tier-underwater .tier-dot { background: var(--red); }

/* FEATURES */
.features {
  padding: 64px 48px;
  border-bottom: 1px solid var(--border);
}
.features-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.feature-block {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  margin-bottom: 32px;
}
.feature-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  padding-top: 4px;
}
.feature-headline {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.feature-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.sdk-demo {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 20px;
}
.sdk-demo-header {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: 8px 16px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}
.sdk-code {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.8;
  overflow-x: auto;
}
.sdk-features {
  display: flex;
  gap: 16px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}
.rail-diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}
.rail-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.rail-items {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.rail-items span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.rail-active {
  background: var(--accent-dim) !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}
.rail-more { opacity: 0.5; }
.rail-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* PRICING MODEL */
.pricingmodel {
  padding: 64px 48px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.pricingmodel-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 32px;
}
.strategy-item {
  background: var(--bg);
  padding: 20px;
}
.strategy-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  margin-bottom: 8px;
}
.strategy-name {
  font-family: var(--font-head);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.strategy-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.setup-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px 32px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.setup-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.setup-num {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.setup-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}
.setup-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* CLOSING */
.closing {
  padding: 80px 48px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.closing-inner { max-width: 800px; margin: 0 auto; }
.closing-headline {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 20px;
}
.closing-sub {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  line-height: 1.7;
}
.closing-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
}
.closing-stat { text-align: center; }
.closing-stat-num {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}
.closing-stat-desc {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* FOOTER */
.footer {
  padding: 28px 48px;
  border-bottom: 1px solid var(--border);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.footer-brand {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}
.footer-os { color: var(--accent); }
.footer-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  flex: 1;
}
.footer-sep { margin: 0 8px; }
.footer-stack {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .nav { padding: 16px 24px; }
  .hero { padding: 48px 24px 40px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .accountant { padding: 48px 24px; }
  .accountant-inner { grid-template-columns: 1fr; gap: 32px; }
  .marginreport { padding: 48px 24px; }
  .margin-grid { grid-template-columns: 1fr; }
  .features { padding: 48px 24px; }
  .features-inner { grid-template-columns: 1fr; }
  .pricingmodel { padding: 48px 24px; }
  .strategy-grid { grid-template-columns: repeat(2, 1fr); }
  .closing { padding: 48px 24px; }
  .closing-stats { gap: 24px; flex-wrap: wrap; }
  .footer { padding: 20px 24px; }
  .footer-inner { flex-wrap: wrap; }
  .footer-meta { order: 3; width: 100%; }
  .footer-stack { display: none; }
  .setup-bar { flex-wrap: wrap; gap: 16px; }
  .tier-row { gap: 12px; }
}

@media (max-width: 600px) {
  .strategy-grid { grid-template-columns: 1fr; }
  .nav-tagline { display: none; }
}