:root {
  --bg-deep: #1c1712;
  --bg-panel: #241d16;
  --bg-panel-raised: #2c2419;
  --bronze: #c17f3d;
  --bronze-bright: #d99a56;
  --bronze-dim: #6e4c2a;
  --patina: #6fa089;
  --patina-bright: #8ec2a9;
  --patina-dim: #3d5449;
  --text-primary: #ede4d4;
  --text-secondary: #a89b86;
  --text-muted: #6e6355;
  --border: #3a3226;
  --border-bright: #4d4230;
  --font-display: "Source Serif 4", serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html { -webkit-font-smoothing: antialiased; }

body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  position: relative;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 2;
}

/* Topbar */
.topbar { padding: 28px 0 0; }
.topbar-inner { display: flex; align-items: center; gap: 12px; }
.mark {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 600;
  font-size: 20px;
  color: var(--bronze-bright);
  border: 1px solid var(--border-bright);
  border-radius: 2px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.topbar-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

/* Tab nav */
.tabnav {
  display: flex;
  gap: 4px;
  padding: 24px 28px 0;
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 10px 4px 14px;
  margin-right: 24px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.is-active { color: var(--bronze-bright); border-bottom-color: var(--bronze-bright); }
.tab-btn:focus-visible { outline: 2px solid var(--patina-bright); outline-offset: 2px; }

/* Hero */
.hero { padding: 72px 0 56px; max-width: 760px; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--patina-bright);
  margin: 0 0 18px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(34px, 5.4vw, 54px);
  line-height: 1.14;
  margin: 0 0 22px;
  letter-spacing: -0.01em;
}
.hero h1 em {
  font-style: italic;
  color: var(--bronze-bright);
}
.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0;
}
.hero--compact { padding: 48px 0 40px; }
.hero--compact .hero-sub { max-width: 640px; }

/* Simulator layout */
.simulator {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 32px;
  align-items: start;
  padding: 16px 0 40px;
}

.panel-input {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.field-group { display: flex; flex-direction: column; gap: 10px; }
.field-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}
.field-hint {
  font-size: 12.5px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border-bright);
  border-radius: 2px;
  padding: 9px 14px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.chip:hover { border-color: var(--bronze); color: var(--text-primary); }
.chip.is-active {
  background: var(--bronze-dim);
  border-color: var(--bronze);
  color: var(--text-primary);
}
.chip:focus-visible, .route-btn:focus-visible, .cta-button:focus-visible {
  outline: 2px solid var(--patina-bright);
  outline-offset: 2px;
}

.route-toggle { display: flex; flex-direction: column; gap: 8px; }
.route-toggle--compact { flex-direction: row; flex-wrap: wrap; }
.route-toggle--compact .chip { flex: 1; text-align: center; }

#imovel-params {
  display: flex;
  flex-direction: column;
  gap: 26px;
  padding: 18px;
  margin: -4px 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-panel-raised);
}
.route-btn {
  text-align: left;
  background: transparent;
  border: 1px solid var(--border-bright);
  border-radius: 2px;
  padding: 12px 14px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: border-color 0.15s, background 0.15s;
}
.route-btn:hover { border-color: var(--bronze); }
.route-btn.is-active { background: var(--bg-panel-raised); border-color: var(--patina); }
.route-name { font-size: 14px; font-weight: 500; color: var(--text-primary); }
.route-desc { font-size: 12.5px; color: var(--text-muted); }

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 2px;
  background: var(--border-bright);
  border-radius: 1px;
  margin: 6px 0;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bronze-bright);
  border: 2px solid var(--bg-deep);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bronze-bright);
  border: 2px solid var(--bg-deep);
  cursor: pointer;
}
.range-value {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--text-primary);
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.range-hint { font-size: 12px; color: var(--text-muted); }

/* Visual panel */
.panel-visual {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 480px;
  justify-content: center;
}
.ring-stage { width: 100%; max-width: 420px; }
#ring-chart { width: 100%; height: auto; overflow: visible; }
.ring-center-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  fill: var(--text-muted);
  text-transform: uppercase;
}
.ring-center-value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  fill: var(--text-primary);
}
.legend {
  margin-top: 18px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.legend-dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.legend-dot--start { background: var(--bronze); margin-left: 4px; }
.legend-dot--end { background: var(--patina); margin-left: 14px; }

.ring-arc { transition: d 0.5s ease, opacity 0.4s ease; }

/* Results */
.results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 56px;
}
.result-card {
  background: var(--bg-panel);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.result-label {
  font-size: 12.5px;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}
.result-value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 500;
  color: var(--bronze-bright);
}
.result-card:nth-child(2) .result-value { color: var(--patina-bright); }
.result-card:nth-child(3) .result-value { color: var(--text-primary); }
.result-note { font-size: 12px; color: var(--text-muted); }

/* Timeline */
.timeline { padding-bottom: 48px; }
.timeline h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 26px;
  margin: 0 0 24px;
}
.ledger { display: flex; flex-direction: column; }
.ledger-row {
  display: grid;
  grid-template-columns: 44px 100px 1fr auto;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.ledger-row:last-child { border-bottom: 1px solid var(--border); }
.ledger-index { font-family: var(--font-mono); color: var(--text-muted); font-size: 13px; }
.ledger-year { font-family: var(--font-mono); color: var(--text-secondary); font-size: 13px; }
.ledger-desc { color: var(--text-primary); }
.ledger-value { font-family: var(--font-mono); color: var(--patina-bright); text-align: right; white-space: nowrap; }

/* Explainer ledger (steps with prose) */
.ledger-row--explainer {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 22px 0;
}
.ledger-row--explainer .ledger-index {
  flex-shrink: 0;
  width: 32px;
  font-size: 15px;
  padding-top: 2px;
}
.ledger-explainer-body { display: flex; flex-direction: column; gap: 6px; }
.ledger-explainer-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  color: var(--text-primary);
}
.ledger-explainer-body p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
  max-width: 620px;
}
.ledger-explainer-body strong { color: var(--patina-bright); font-weight: 500; }

/* FAQ */
.faq { padding-bottom: 48px; }
.faq h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 26px;
  margin: 0 0 24px;
}
.faq-item {
  padding: 18px 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item:last-child { border-bottom: 1px solid var(--border); }
.faq-q { font-size: 15px; font-weight: 500; color: var(--text-primary); }
.faq-a { font-size: 14.5px; color: var(--text-secondary); line-height: 1.65; margin: 0; max-width: 640px; }

/* Disclaimer */
.disclaimer { padding-bottom: 48px; }
.disclaimer p {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.6;
  border-left: 2px solid var(--border-bright);
  padding-left: 16px;
  max-width: 680px;
  margin: 0;
}

/* CTA */
.cta {
  text-align: center;
  padding: 56px 0 80px;
  border-top: 1px solid var(--border);
}
.cta h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-style: italic;
  font-size: clamp(26px, 4vw, 36px);
  margin: 0 0 12px;
}
.cta p { color: var(--text-secondary); margin: 0 0 28px; }
.cta-button {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  color: var(--bg-deep);
  background: var(--patina-bright);
  padding: 15px 32px;
  border-radius: 2px;
  text-decoration: none;
  transition: background 0.15s;
}
.cta-button:hover { background: var(--bronze-bright); }

.footer {
  padding: 24px 0 40px;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

@media (prefers-reduced-motion: reduce) {
  .ring-arc { transition: none; }
}

@media (max-width: 860px) {
  .simulator { grid-template-columns: 1fr; }
  .results { grid-template-columns: 1fr; }
  .ledger-row { grid-template-columns: 32px 76px 1fr; }
  .ledger-value { grid-column: 1 / -1; text-align: left; padding-left: 48px; margin-top: -8px; }
}