:root {
  --bg: #07090d;
  --bg-2: #0b1017;
  --card: #10161f;
  --ink: #f3efe6;
  --muted: #9b9488;
  --gold: #c4a87a;
  --gold-b: #e4d2ae;
  --line: rgba(196, 168, 122, 0.22);
  --line-s: rgba(196, 168, 122, 0.45);
  --support: #8fad9a;
  --contra: #c4847a;
  --mixed: #d4a574;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", serif;
  --sans: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  color-scheme: dark;
}

body {
  font-size: 16px;
  line-height: 1.5;
}

a {
  color: var(--gold-b);
  text-decoration: none;
}

a:hover {
  color: var(--ink);
}

button,
input {
  font: inherit;
}

.app {
  min-height: 100vh;
}

.boot {
  min-height: 100vh;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  color: var(--gold-b);
  font-family: var(--serif);
}

.boot span {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 13px;
}

.demo-bar {
  background: #14110c;
  border-bottom: 1px solid var(--line);
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-align: center;
  padding: 8px 16px;
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 28px 10px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: 0.16em;
  color: var(--gold-b);
}

.wordmark span {
  display: block;
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-top: 2px;
}

.pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line-s);
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 10px;
}

.pill.warn {
  color: var(--mixed);
  border-color: rgba(212, 165, 116, 0.45);
}

.pill.ok {
  color: var(--support);
  border-color: rgba(143, 173, 154, 0.45);
}

.step-meta {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rail {
  display: flex;
  gap: 6px;
  padding: 12px 28px 0;
  overflow-x: auto;
}

.rail a {
  flex: 1;
  min-width: 28px;
  height: 3px;
  background: rgba(196, 168, 122, 0.18);
}

.rail a.on {
  background: var(--gold);
}

.rail a.done {
  background: rgba(196, 168, 122, 0.55);
}

.chapter {
  max-width: 1080px;
  width: calc(100% - 48px);
  margin: 0 auto;
  padding: 36px 0 48px;
}

.kicker {
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(32px, 4.6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

h1 em {
  font-style: italic;
  color: var(--gold-b);
}

h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 28px;
  margin: 0 0 12px;
}

.lead {
  color: var(--muted);
  font-size: 18px;
  max-width: 40rem;
  margin: 0 0 28px;
}

.foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 28px 22px;
  border-top: 1px solid var(--line);
  background: rgba(7, 9, 13, 0.92);
  position: sticky;
  bottom: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  padding: 12px 22px;
  letter-spacing: 0.04em;
}

.btn-primary {
  background: var(--gold);
  color: #14110c;
}

.btn-primary:hover {
  background: var(--gold-b);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-s);
}

.btn-ghost:hover {
  border-color: var(--gold);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.chain {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.formula {
  display: inline-block;
  margin: 0 0 28px;
  padding: 14px 18px;
  border: 1px solid var(--line-s);
  background: #0e141c;
  color: var(--gold-b);
  font-family: var(--serif);
  font-size: clamp(16px, 2.2vw, 22px);
  letter-spacing: 0.02em;
}

.formula-note {
  margin: -16px 0 36px;
  max-width: 40rem;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 28px;
}

.pain-grid .panel {
  min-height: 100%;
}

.pain-grid p {
  margin: 0;
}

.case-break {
  margin: 8px 0 12px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.why {
  border: 1px solid var(--line);
  background: var(--card);
  padding: 22px 24px;
  margin: 8px 0 24px;
  max-width: 46rem;
}

.why h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.why ol {
  margin: 14px 0 0;
  padding-left: 22px;
  color: var(--ink);
}

.why li {
  margin: 0 0 10px;
}

.why li:last-child {
  margin-bottom: 0;
}

.btn-cta {
  white-space: normal;
  text-align: center;
  line-height: 1.35;
  max-width: min(100%, 28rem);
}

.chain b {
  color: var(--gold-b);
  font-weight: 600;
}

.chain span {
  opacity: 0.45;
}

.facts {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: start;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 22px;
}

.panel h3 {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.stat {
  font-family: var(--serif);
  font-size: 36px;
  color: var(--gold-b);
  margin: 4px 0 8px;
}

.muted {
  color: var(--muted);
}

.contract {
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.65;
  color: #d8d0c4;
}

.contract p {
  margin: 0 0 14px;
}

.contract p.hi {
  color: var(--ink);
  border-left: 2px solid var(--gold);
  padding-left: 12px;
}

.commit-list {
  display: grid;
  gap: 10px;
}

.commit {
  border: 1px solid var(--line);
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}

.commit.on {
  border-color: var(--gold);
  background: rgba(196, 168, 122, 0.06);
}

.commit small {
  color: var(--muted);
  display: block;
}

.commit b {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--gold-b);
}

.graph-wrap {
  border: 1px solid var(--line);
  background: radial-gradient(ellipse at 50% 42%, #141c28 0%, var(--bg) 70%);
  padding: 12px 8px 8px;
}

.graph-caption {
  min-height: 4.6em;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.graph-caption strong {
  color: var(--gold-b);
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
}

.ev-node {
  cursor: pointer;
}

.ev-node rect {
  fill: var(--card);
  stroke: var(--line-s);
}

.ev-node.on rect,
.ev-node:hover rect {
  stroke: var(--gold);
  fill: #18202c;
}

.ev-hub rect {
  fill: #16120e;
  stroke: var(--gold);
}

.ev-edge {
  fill: none;
  stroke: rgba(196, 168, 122, 0.35);
  stroke-width: 1.4;
}

.ev-edge.on {
  stroke: var(--gold-b);
  stroke-width: 2;
}

.detect-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 8px 0 22px;
}

.detect-grid .panel {
  text-align: center;
}

.detect-grid .stat {
  font-size: 42px;
}

.detect-grid .contra {
  color: var(--contra);
}

.find-card {
  border: 1px solid var(--line-s);
  padding: 20px 22px;
  margin-bottom: 18px;
}

.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.note {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
}

.impact-hero {
  font-family: var(--serif);
  font-size: clamp(56px, 9vw, 92px);
  line-height: 0.95;
  color: var(--gold-b);
  margin: 8px 0 10px;
  letter-spacing: -0.03em;
}

.breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 28px 0;
}

.breakdown .panel .stat {
  font-size: 28px;
}

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}

.compare ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.compare h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
}

.compare .with {
  border-color: var(--gold);
}

.compare .with h3 {
  color: var(--gold-b);
}

.action-list {
  display: grid;
  gap: 12px;
}

.action-list article {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 14px;
  border: 1px solid var(--line);
  padding: 16px 18px;
}

.num {
  font-family: var(--serif);
  color: var(--gold);
  font-size: 22px;
}

.end-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

@media (max-width: 860px) {
  .facts,
  .detect-grid,
  .breakdown,
  .compare,
  .pain-grid {
    grid-template-columns: 1fr;
  }
  .chapter {
    width: calc(100% - 32px);
    padding-top: 24px;
  }
  .top,
  .foot,
  .rail {
    padding-left: 16px;
    padding-right: 16px;
  }
  .foot {
    flex-direction: column-reverse;
  }
  .btn {
    width: 100%;
  }
  .btn-cta {
    max-width: 100%;
  }
}