:root {
  color-scheme: light;
  --paper: #f7f7f0;
  --ink: #20261f;
  --muted: #5a6255;
  --green: #326d3d;
  --fresh: #a5d18c;
  --line: #d7dbce;
  --vault: #edf1e5;
  --space-1: .5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 1rem; line-height: 1.6; }
a { color: inherit; text-underline-offset: .22em; }
a:hover { color: var(--green); }
a, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 5px; }
::selection { background: #d2e9bc; color: var(--ink); }
p, h1, h2, h3, figure { margin: 0; }
p + p { margin-top: var(--space-2); }
h1, h2, h3 { font-weight: 600; }
h2 { font-size: clamp(2.1rem, 3.5vw, 3.25rem); letter-spacing: -.045em; line-height: 1.1; }
h3 { font-size: 1.25rem; letter-spacing: -.025em; line-height: 1.3; }
.wrap { width: min(1200px, calc(100% - 112px)); margin-inline: auto; }
.skip-link { position: absolute; z-index: 10; top: 12px; left: 12px; padding: 12px 20px; background: var(--ink); color: white; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); color: white; }
.site-header { display: flex; justify-content: space-between; align-items: center; padding-block: 28px; border-bottom: 1px solid var(--line); gap: var(--space-4); }
.wordmark { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; font-size: 1.6rem; font-weight: 700; letter-spacing: -.055em; line-height: 1.3; min-height: 44px; }
.wordmark-dot { color: var(--green); margin-left: -8px; }
.site-header nav { display: flex; gap: var(--space-4); }
.site-header nav a { display: inline-flex; min-height: 44px; align-items: center; font-size: .875rem; text-decoration: none; }
.site-header nav a:hover { text-decoration: underline; }
.hero { display: grid; grid-template-columns: 1.05fr 1fr; column-gap: var(--space-3); padding-top: 60px; }
.eyebrow, .section-label { font-size: .8125rem; font-weight: 600; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 28px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); }
h1 { font-size: clamp(3.6rem, 6.3vw, 5.65rem); line-height: .99; letter-spacing: -.065em; }
h1 span { color: var(--green); }
.hero-intro { margin-block: var(--space-4) var(--space-3); font-size: 1.125rem; line-height: 1.5; }
.text-link { display: inline-flex; align-items: center; gap: var(--space-3); min-height: 44px; font-size: .875rem; font-weight: 600; text-decoration-thickness: 1px; }
.text-link span { font-size: 1.4rem; font-weight: 400; }
.hero-diagram { align-self: center; padding-top: var(--space-4); }
.hero-diagram svg { width: 100%; height: auto; display: block; overflow: visible; }
.hero-diagram figcaption { margin-top: var(--space-4); margin-left: 9%; color: var(--muted); font-size: .8125rem; line-height: 1.6; }
.concept-notice { grid-column: 1 / -1; padding-block: var(--space-4); margin-top: 36px; font-size: .75rem; color: var(--muted); }
.concept-notice strong { color: var(--ink); font-weight: 600; }
.flow-band { background: #eceee3; border-block: 1px solid var(--line); }
.flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1.2fr auto 1fr; align-items: center; gap: var(--space-3); padding-block: 25px; }
.flow p { margin: 0; font-size: .875rem; font-weight: 600; }
.flow p span { display: block; color: var(--green); font-size: .6875rem; margin-bottom: 3px; }
.flow b { font-weight: 400; color: var(--green); }
.section { padding-block: var(--space-7); }
.section-label { color: var(--green); margin-bottom: var(--space-3); }
.model-layout { display: grid; grid-template-columns: 1fr 1.35fr; gap: var(--space-7); }
.section-intro > p:not(.section-label) { max-width: 31ch; margin-top: var(--space-3); }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.journey { list-style: none; counter-reset: journey; margin: 0; padding: 0; }
.journey li { counter-increment: journey; display: grid; grid-template-columns: 32px 1fr; gap: var(--space-3); padding-bottom: var(--space-4); margin-bottom: var(--space-4); border-bottom: 1px solid var(--line); }
.journey li::before { content: "0" counter(journey); font-size: .8125rem; padding-top: 3px; color: var(--green); font-variant-numeric: tabular-nums; }
.journey li:last-child { padding-bottom: 0; margin-bottom: 0; border: 0; }
.journey h3 { margin-bottom: 10px; }
.journey p { font-size: .9375rem; }
.journey p + p { margin-top: 10px; }
.provider-line { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-block: var(--space-3) 8px; font-size: 1.0625rem; font-weight: 600; letter-spacing: -.035em; }
.provider-line span + span { padding-left: var(--space-3); border-left: 1px solid #bdc4b4; }
.journey p.small { font-size: .8125rem; }
.inline-link { display: inline-block; font-size: .875rem; padding-block: 12px 0; }
.vault-section { background: var(--vault); }
.vault-heading { display: grid; grid-template-columns: 1.35fr 1fr; gap: var(--space-6); align-items: end; }
.vault-heading > p { max-width: 38ch; padding-bottom: 3px; }
.formula-layout { display: grid; grid-template-columns: 1fr 1.1fr; gap: var(--space-6); padding-block: var(--space-5); margin-top: var(--space-5); border-block: 1px solid #c8d0bd; }
.formula-block { border-right: 1px solid #c8d0bd; }
.formula-block > .small { color: var(--muted); }
.main-formula { font-size: clamp(2.5rem, 4.5vw, 4rem); line-height: 1.15; font-weight: 500; letter-spacing: -.045em; margin-top: 10px; }
.variables { margin: var(--space-3) 0 0; font-size: .875rem; }
.variables div { display: flex; gap: var(--space-3); margin-top: 8px; }
.variables dt { width: 12px; font-weight: 700; }
.variables dd { margin: 0; color: var(--muted); }
.formula-explanation h3 { margin-bottom: var(--space-2); }
.formula-explanation p { font-size: .9375rem; }
.formula-explanation p.small { font-size: .8125rem; max-width: 52ch; }
.formula-explanation strong { font-weight: 600; }
.formula-explanation .identity { font-size: 1rem; font-weight: 600; margin-top: var(--space-1); }
.example { margin-top: var(--space-5); }
table { width: 100%; border-collapse: collapse; font-size: .9375rem; font-variant-numeric: tabular-nums; }
caption { text-align: left; margin-bottom: var(--space-3); }
caption strong { display: block; font-size: 1.25rem; font-weight: 600; letter-spacing: -.025em; }
caption span { display: block; color: var(--muted); font-size: .8125rem; margin-top: 6px; }
th, td { text-align: right; padding: var(--space-3); border-bottom: 1px solid #c8d0bd; }
th:first-child { text-align: left; padding-left: 0; width: 45%; }
thead th { font-weight: 400; font-size: .8125rem; color: var(--muted); padding-top: 0; }
tbody th { font-weight: 500; }
tbody th span { display: block; font-size: .8125rem; color: var(--muted); font-weight: 400; margin-top: 4px; }
td:last-child { font-weight: 600; padding-right: 0; }
thead th:last-child { padding-right: 0; }
.revenue-row td:last-child { color: var(--green); }
.vault-takeaway { display: flex; gap: var(--space-3); margin-top: var(--space-4); max-width: 72ch; }
.vault-takeaway > span { display: grid; place-items: center; width: 36px; height: 36px; flex-shrink: 0; background: var(--fresh); font-size: 1.5rem; }
.vault-takeaway p { font-size: .9375rem; }
.vault-takeaway strong { font-weight: 600; }
.vault-note { max-width: 91ch; font-size: .8125rem; color: var(--muted); margin-top: var(--space-3); }
.market-intro { max-width: 51ch; }
.market-intro > p:last-child { margin-top: var(--space-3); }
.market-columns { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-7); margin-top: var(--space-5); }
.market-columns > div { border-top: 1px solid var(--line); padding-top: var(--space-3); }
.market-symbol { display: block; font-size: 2rem; color: var(--green); margin-bottom: var(--space-2); }
.market-columns h3 { margin-bottom: var(--space-2); }
.market-columns p { max-width: 48ch; }
.requirements { display: grid; grid-template-columns: 1fr 2.15fr; gap: var(--space-6); padding: var(--space-4); margin-top: var(--space-5); background: #eceee3; }
.requirements h3 { font-size: 1.0625rem; }
.requirements p { font-size: .875rem; }
.questions-layout { border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1.35fr; gap: var(--space-7); }
.questions-layout h2 + p { margin-top: var(--space-3); }
.questions details { border-bottom: 1px solid var(--line); }
.questions details:first-child { border-top: 1px solid var(--line); }
.questions summary { cursor: pointer; position: relative; padding: 24px 36px 24px 0; font-weight: 600; font-size: .9375rem; list-style: none; }
.questions summary::-webkit-details-marker { display: none; }
.questions summary::after { content: "+"; position: absolute; right: 5px; top: 20px; font-size: 1.4rem; font-weight: 400; color: var(--green); }
.questions details[open] summary::after { content: "−"; }
.questions summary:hover { color: var(--green); }
.answer { padding: 0 24px 24px 0; font-size: .9375rem; }
.site-footer { border-top: 1px solid var(--line); padding-block: var(--space-4); display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); }
.site-footer p { font-size: .75rem; color: var(--muted); margin: 0; }
@media (min-width: 1600px) { .hero { padding-top: 80px; } }
@media (max-width: 1050px) {
  .wrap { width: calc(100% - 64px); }
  .model-layout, .questions-layout { gap: var(--space-5); grid-template-columns: 1fr 1.4fr; }
  .market-columns { gap: var(--space-5); }
  .vault-heading { gap: var(--space-4); }
  .hero { column-gap: 0; }
  h1 { font-size: clamp(3.6rem, 7.3vw, 5.2rem); }
  .formula-layout { gap: var(--space-4); }
}
@media (max-width: 760px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { padding-block: 16px; gap: 16px; }
  .wordmark { font-size: 1.4rem; gap: 7px; }
  .wordmark svg { width: 24px; height: 24px; }
  .site-header nav { gap: 18px; }
  .site-header nav a { font-size: .75rem; }
  .hero { grid-template-columns: 1fr; padding-top: 36px; }
  .eyebrow { margin-bottom: var(--space-3); }
  h1 { font-size: clamp(3.55rem, 10vw, 5rem); }
  h1 br:nth-of-type(1), h1 br:nth-of-type(3) { display: none; }
  .hero-intro { font-size: 1rem; margin-top: var(--space-3); }
  .hero-diagram { width: min(100%, 480px); margin-inline: auto; padding-top: var(--space-4); }
  .hero-diagram figcaption { margin-top: var(--space-3); margin-left: 9%; }
  .concept-notice { margin-top: var(--space-3); padding-block: var(--space-3); max-width: 48ch; }
  .flow { grid-template-columns: 1fr auto 1fr; gap: var(--space-3); }
  .flow b:nth-of-type(2) { display: none; }
  .flow p { font-size: .8125rem; }
  .section { padding-block: var(--space-6); }
  .model-layout, .questions-layout { grid-template-columns: 1fr; gap: var(--space-5); }
  .section-intro > p:not(.section-label) { max-width: 52ch; }
  .section-intro h2 br { display: none; }
  .section-intro h2 { max-width: 15ch; }
  .journey li { grid-template-columns: 24px 1fr; gap: var(--space-2); }
  .journey p { font-size: 1rem; }
  .vault-heading, .formula-layout { grid-template-columns: 1fr; gap: var(--space-4); }
  .vault-heading > p { max-width: 52ch; }
  .formula-layout { margin-top: var(--space-4); padding-block: var(--space-4); }
  .formula-block { border: 0; }
  .main-formula { font-size: 3.5rem; }
  .variables { margin-top: var(--space-2); }
  .formula-explanation { border-top: 1px solid #c8d0bd; padding-top: var(--space-4); }
  .example { margin-top: var(--space-4); }
  th, td { padding: 16px 8px; }
  th:first-child { width: 38%; }
  table { font-size: .875rem; }
  thead th { font-size: .75rem; }
  tbody th span { font-size: .75rem; }
  .vault-takeaway { gap: var(--space-2); }
  .market-columns { gap: var(--space-4); }
  .requirements { grid-template-columns: 1fr; gap: var(--space-2); padding: var(--space-3); }
  .site-footer { flex-wrap: wrap; }
}
@media (max-width: 440px) {
  .site-header { flex-wrap: wrap; gap: 0; }
  .site-header nav { width: 100%; justify-content: space-between; padding-top: 4px; }
  .site-header nav a { font-size: .8125rem; }
  .hero { padding-top: 28px; }
  h1 { font-size: clamp(3.25rem, 14vw, 3.85rem); }
  h1 br:nth-of-type(1), h1 br:nth-of-type(3) { display: initial; }
  .hero-intro { margin-bottom: var(--space-2); }
  .hero-diagram { padding-top: var(--space-3); }
  .hero-diagram figcaption { font-size: .75rem; }
  h2 { font-size: 2.25rem; }
  .market-columns { grid-template-columns: 1fr; }
  .market-symbol { margin-bottom: 8px; }
  .flow { column-gap: 16px; }
  .flow p { font-size: .75rem; }
  table { font-size: .8125rem; }
  th, td { padding-inline: 5px; }
  .formula-explanation .identity { font-size: .9375rem; }
  .site-footer { gap: var(--space-3); }
  .site-footer > .text-link { width: 100%; }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
@media print {
  .skip-link, .site-header nav, .text-link, .site-footer { display: none; }
  .wrap { width: 100%; }
  .hero, .section { padding-block: 24px; }
  h1 { font-size: 48px; }
  .hero-diagram { max-width: 360px; }
  details > .answer { display: block !important; }
  .journey li, .formula-layout, tr, details { break-inside: avoid; }
}