:root {
  --ink: #171713;
  --paper: #f4f1e8;
  --paper-deep: #e9e4d7;
  --white: #fffef9;
  --lime: #d9ff43;
  --teal: #0a6b61;
  --teal-dark: #06483f;
  --blue: #2a54d6;
  --red: #c43329;
  --line: rgba(23, 23, 19, .18);
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); }
button, input { font: inherit; }
.skip { position: fixed; top: -80px; left: 16px; z-index: 20; background: var(--lime); color: var(--ink); padding: 10px 14px; }
.skip:focus { top: 16px; }

.hero { background: var(--teal-dark); color: var(--white); padding: 28px clamp(24px, 6vw, 88px) 58px; position: relative; overflow: hidden; }
.hero::after { content: "A"; position: absolute; right: -22px; bottom: -110px; font: 420px/.8 var(--serif); color: rgba(217,255,67,.08); }
.hero__top, .hero__grid, main, footer { max-width: 1540px; margin-inline: auto; }
.hero__top { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid rgba(255,255,255,.22); padding-bottom: 18px; }
.eyebrow, .kicker, .status, .step, .scenario-label, .view-intro span, .metric small, .party-view small, .break-even-grid small, .cash-event small { font: 700 11px/1.2 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.status { display: flex; gap: 8px; align-items: center; }
.status i { width: 8px; height: 8px; background: var(--lime); border-radius: 50%; box-shadow: 0 0 0 4px rgba(217,255,67,.15); }
.hero__grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: clamp(40px, 9vw, 150px); align-items: end; padding-top: 48px; }
.kicker { color: var(--lime); margin: 0 0 18px; }
h1 { font: 400 clamp(48px, 6.5vw, 96px)/.93 var(--serif); letter-spacing: -.04em; margin: 0; }
h1 em { color: var(--lime); font-weight: 400; }
.lede { font: 400 18px/1.55 var(--sans); color: rgba(255,255,255,.78); margin: 0 0 5px; max-width: 520px; }

main { display: grid; grid-template-columns: minmax(450px, .9fr) minmax(520px, 1.1fr); min-height: 900px; }
.control-rail, .results { padding: 42px clamp(24px, 4vw, 60px) 56px; }
.control-rail { border-right: 1px solid var(--line); background: var(--white); }
.results { position: sticky; top: 0; align-self: start; max-height: 100vh; overflow-y: auto; }
.section-heading, .section-heading > div, .subheading, .subheading > div { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.section-heading { border-bottom: 2px solid var(--ink); padding-bottom: 14px; }
.section-heading h2, .subheading h2 { font: 700 18px/1 var(--sans); margin: 0; }
.step { display: grid; place-items: center; width: 29px; height: 29px; background: var(--ink); color: var(--white); border-radius: 50%; }
.quiet-button { border: 0; background: transparent; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; padding: 8px 0; }
.preset-strip { display: flex; gap: 8px; flex-wrap: wrap; margin: 20px 0 26px; }
.preset-strip button { border: 1px solid var(--ink); border-radius: 999px; background: transparent; padding: 8px 12px; cursor: pointer; font: 650 12px var(--sans); }
.preset-strip button:hover, .preset-strip button.active { background: var(--lime); }
.oracle-states { margin: -13px 0 26px; border: 1px solid var(--line); background: rgba(255,255,255,.46); }
.oracle-states summary { padding: 10px 12px; cursor: pointer; color: var(--teal); font: 750 12px var(--sans); }
.oracle-states .preset-strip { margin: 0; padding: 0 12px 12px; }
.oracle-states .preset-strip button { font-size: 11px; padding: 6px 10px; }

fieldset { border: 0; padding: 0; margin: 0; }
legend, .input-section h3 { font: 700 13px/1.2 var(--sans); margin: 0 0 13px; }
.role-picker fieldset { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.role-picker label { cursor: pointer; position: relative; }
.role-picker input { position: absolute; opacity: 0; }
.role-picker label span { display: block; min-height: 100%; border: 1px solid var(--line); padding: 13px; background: var(--paper); }
.role-picker label strong, .role-picker label small { display: block; }
.role-picker label small { font-size: 11px; line-height: 1.35; margin-top: 5px; opacity: .65; }
.role-picker input:checked + span { border-color: var(--teal); outline: 2px solid var(--teal); background: #e7f6f1; }
.input-section { padding: 24px 0; border-bottom: 1px solid var(--line); }
.hint { color: #69685f; font-size: 12px; margin: -5px 0 14px; }
.fields { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.fields label { font-size: 12px; font-weight: 650; position: relative; }
.fields input { display: block; width: 100%; margin-top: 7px; border: 1px solid var(--line); background: var(--white); padding: 11px 36px 11px 11px; border-radius: 2px; outline: none; }
.fields input:focus { border-color: var(--teal); box-shadow: 0 0 0 2px rgba(10,107,97,.15); }
.fields input[aria-invalid="true"] { border-color: var(--red); background: #fff4f1; }
.fields label > b { position: absolute; right: 10px; top: 34px; font-size: 11px; color: #777; }
.fields label > small { display: block; color: #777; margin-top: 5px; font-weight: 400; }
.error { display: block; color: var(--red); min-height: 0; font-size: 11px; line-height: 1.3; margin-top: 4px; }
.split-section { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.compact { grid-template-columns: 1fr 1fr; }

.results-heading { margin-bottom: 20px; }
.scenario-label { color: var(--teal); }
.tabs { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--ink); margin-bottom: 18px; }
.tabs button { border: 0; border-right: 1px solid var(--ink); padding: 11px; background: transparent; cursor: pointer; font-weight: 700; font-size: 12px; }
.tabs button:last-child { border-right: 0; }
.tabs button[aria-selected="true"] { background: var(--ink); color: var(--white); }
.metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.metric { background: var(--white); border: 1px solid var(--line); padding: 20px; min-height: 140px; }
.metric.hero-metric { background: var(--lime); }
.metric small, .party-view small, .break-even-grid small { color: #69685f; }
.metric strong { display: block; font: 600 clamp(24px, 2.5vw, 37px)/1.05 var(--serif); margin: 18px 0 8px; letter-spacing: -.03em; overflow-wrap: anywhere; }
.metric p, .break-even-grid p { margin: 0; color: #69685f; font-size: 11px; line-height: 1.4; }
.party-view { background: var(--teal-dark); color: var(--white); padding: 28px; }
.view-intro span { color: var(--lime); }
.view-intro h3 { font: 400 30px/1.08 var(--serif); max-width: 620px; margin: 10px 0; }
.view-intro p { color: rgba(255,255,255,.65); margin: 0 0 25px; }
.metric-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: rgba(255,255,255,.2); }
.metric-row article { background: var(--teal-dark); padding: 18px; }
.metric-row strong { display: block; font: 500 24px var(--serif); margin-top: 10px; }
.formula-callout { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: center; gap: 14px; margin: 28px 0; }
.formula-callout div { border-top: 1px solid rgba(255,255,255,.3); padding-top: 14px; }
.formula-callout strong { display: block; font: 500 23px var(--serif); margin-top: 8px; }
.formula-callout i { color: var(--lime); font: 400 28px var(--serif); }
.exclusion { color: rgba(255,255,255,.68); font-size: 13px; }
.exclusion strong { color: var(--white); }
.break-even-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.break-even-grid article { border: 1px solid var(--line); padding: 18px; background: var(--paper-deep); }
.break-even-grid strong { display: block; margin: 10px 0 5px; font: 500 21px var(--serif); }
.timeline-wrap { margin-top: 30px; }
.subheading { border-bottom: 1px solid var(--ink); padding-bottom: 12px; }
.subheading > span { font: 700 11px var(--mono); color: #69685f; }
.timeline { position: relative; padding: 26px 0 10px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; }
.timeline::before { content: ""; position: absolute; left: 4%; right: 8%; top: 19px; height: 2px; background: var(--ink); }
.cash-event { background: var(--white); border: 1px solid var(--line); padding: 15px; position: relative; }
.cash-event .dot { position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--blue); top: -13px; left: var(--left); }
.cash-event.negative .dot { background: var(--red); }
.cash-event strong { display: block; font: 500 19px var(--serif); margin: 8px 0 4px; }
.cash-event.positive strong { color: var(--teal); }
.cash-event.negative strong { color: var(--red); }
.cash-event p { margin: 0; font-size: 11px; color: #69685f; line-height: 1.4; }
.formula-notes { margin-top: 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.formula-notes summary { cursor: pointer; padding: 15px 0; font-weight: 750; font-size: 13px; }
.notes-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; padding-bottom: 20px; }
.notes-grid p { font-size: 12px; line-height: 1.5; margin: 0; }
.notice { padding: 22px; border: 2px solid var(--red); background: #fff4f1; margin-bottom: 18px; }
.notice strong, .notice span { display: block; }
.notice strong { font: 500 28px var(--serif); margin-bottom: 6px; }
.notice span { font-size: 13px; line-height: 1.45; }
.notice.missing-input { border-color: #b07400; background: #fff7df; }

footer { border-top: 1px solid var(--line); padding: 24px clamp(24px, 6vw, 88px); display: flex; justify-content: space-between; gap: 20px; font-size: 11px; color: #69685f; }
footer strong { color: var(--ink); }
[hidden] { display: none !important; }

@media (max-width: 1050px) {
  main { grid-template-columns: 1fr; }
  .control-rail { border-right: 0; }
  .results { position: static; max-height: none; border-top: 8px solid var(--teal-dark); }
}

@media (max-width: 680px) {
  .hero { padding: 22px 20px 42px; }
  .hero__grid { grid-template-columns: 1fr; gap: 28px; padding-top: 34px; }
  .hero__top { align-items: flex-start; gap: 20px; }
  h1 { font-size: 51px; }
  .lede { font-size: 16px; }
  .control-rail, .results { padding: 30px 18px 42px; }
  .section-heading { align-items: flex-start; }
  .role-picker fieldset, .fields, .split-section, .compact, .metric-grid, .break-even-grid, .timeline, .notes-grid { grid-template-columns: 1fr; }
  .role-picker label span { min-height: auto; }
  .tabs button { padding: 10px 5px; }
  .formula-callout { grid-template-columns: 1fr; gap: 8px; }
  .formula-callout i { display: none; }
  .metric-row { grid-template-columns: 1fr; }
  footer { padding: 22px 18px; flex-direction: column; }
}