:root {
  --black: #080808;
  --black-2: #0d0d0e;
  --white: #eeeae3;
  --muted: #9a9690;
  --faint: #5d5a57;
  --line: #272628;
  --line-light: #3a383b;
  --orange: #ff6338;
  --pink: #ff438f;
  --violet: #8b72ff;
  --blue: #4f7dff;
  --sans: "Avenir Next", Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: Iowan Old Style, "Palatino Linotype", Palatino, Georgia, serif;
  --mono: "SFMono-Regular", Menlo, Consolas, monospace;
  --page: 1120px;
}

* { box-sizing: border-box; }
html { background: var(--black); color-scheme: dark; scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--white);
  background: var(--black);
  font: 17px/1.65 var(--sans);
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 8px 11px;
  color: var(--black);
  background: var(--white);
  font: 700 11px var(--mono);
  transform: translateY(-150%);
}
.skip-link:focus { transform: none; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 66px;
  padding: 0 max(24px, calc((100vw - var(--page)) / 2));
  background: var(--black);
  border-bottom: 1px solid var(--line);
}
.brand, .brief-link, .site-header nav a {
  color: var(--muted);
  font: 600 12px var(--mono);
  text-decoration: none;
}
.brand { justify-self: start; }
.brand strong { color: var(--white); font-weight: 800; }
.brand span { padding: 0 5px; color: var(--orange); }
.site-header nav { display: flex; gap: 25px; }
.site-header nav a { padding: 22px 0 20px; border-bottom: 1px solid transparent; }
.site-header nav a:hover,
.site-header nav a.active { color: var(--white); border-color: var(--orange); }
.brief-link { justify-self: end; }
.brief-link:hover { color: var(--orange); }

main { width: min(calc(100% - 48px), var(--page)); margin: 0 auto; }

.intro { padding: clamp(90px, 13vw, 170px) 0 90px; }
.intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  color: var(--muted);
  font: 600 11px var(--mono);
}
.open-status { color: var(--white); }
.open-status i {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 7px;
  background: var(--orange);
}
.intro h1 {
  max-width: 990px;
  margin: 38px 0 55px;
  font: 500 clamp(3.4rem, 7.3vw, 6.5rem)/.98 var(--serif);
  letter-spacing: -.055em;
}
.intro-copy {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
  gap: 80px;
  max-width: 940px;
  padding-top: 32px;
  border-top: 1px solid var(--line-light);
}
.intro-copy p { margin: 0; color: #c1bdb6; font-size: 1.12rem; }
.intro-copy .honesty { color: var(--muted); }
.intro-links { display: flex; gap: 28px; margin-top: 45px; }
.intro-links a {
  padding-bottom: 3px;
  color: var(--white);
  border-bottom: 1px solid var(--faint);
  font: 600 12px var(--mono);
  text-decoration: none;
}
.intro-links a:first-child { color: var(--orange); border-color: var(--orange); }

.sequence-lab {
  margin-bottom: 120px;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}
.sequence-lab > header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  padding: 23px 0;
  border-bottom: 1px solid var(--line);
}
.sequence-lab header span,
.edge-intro > span,
.budget-figure figcaption span {
  color: var(--orange);
  font: 600 10px var(--mono);
}
.sequence-lab h2 { margin: 5px 0 0; font-size: 1rem; font-weight: 600; }
.sequence-lab header p { margin: 0; color: var(--muted); font: 13px var(--serif); }
.sequence-row {
  display: grid;
  grid-template-columns: repeat(9, auto);
  align-items: center;
  justify-content: start;
  gap: clamp(9px, 2.6vw, 36px);
  padding: 45px 0;
}
.sequence-row > i { color: var(--faint); font: 400 14px var(--mono); }
.sequence-row button {
  display: grid;
  gap: 2px;
  min-width: 64px;
  padding: 8px 10px;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-left: 1px solid var(--line-light);
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.sequence-row button span { font: 10px var(--mono); }
.sequence-row button strong { color: var(--white); font: 500 2.5rem/1 var(--serif); }
.sequence-row button:hover,
.sequence-row button.active { color: var(--orange); border-color: var(--orange); }
.sequence-row button.active strong { color: var(--orange); }
.sequence-readout {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto;
  gap: 20px;
  align-items: center;
  min-height: 58px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 11px var(--mono);
}
.sequence-readout strong { color: var(--white); font-weight: 600; }
.sequence-readout button {
  padding: 6px 0 4px 16px;
  color: var(--orange);
  background: transparent;
  border: 0;
  border-left: 1px solid var(--line-light);
  font: 600 11px var(--mono);
  cursor: pointer;
}

.note-section { padding: 90px 0 120px; border-top: 1px solid var(--line-light); }
.section-heading {
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: baseline;
  margin-bottom: 70px;
}
.section-heading > span { color: var(--orange); font: 600 11px var(--mono); }
.section-heading h2 { margin: 0; font: 500 clamp(2.3rem, 4.4vw, 4rem)/1 var(--serif); letter-spacing: -.04em; }

.problem-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
  gap: 80px;
  padding-left: 80px;
}
.problem-copy { max-width: 650px; }
.problem-copy p { margin: 0 0 32px; color: #c3bfb8; font: 1.15rem/1.65 var(--serif); }
.formula {
  margin: 45px 0;
  padding: 28px 0;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
  color: var(--white);
  font: 400 clamp(2.3rem, 5vw, 4.5rem)/1 var(--serif);
  letter-spacing: -.04em;
}
.plain-question { padding-left: 28px; border-left: 2px solid var(--orange); }
.plain-question span { color: var(--orange); font: 600 10px var(--mono); }
.plain-question p { margin: 20px 0 0; color: var(--white); font: 500 1.4rem/1.35 var(--serif); }
.logic-line {
  display: grid;
  grid-template-columns: 1fr auto auto auto 1fr;
  gap: 25px;
  align-items: center;
  margin-top: 80px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 11px var(--mono);
}
.logic-line strong { color: var(--white); font: 500 1.35rem var(--serif); }
.logic-line i { color: var(--orange); font-style: normal; }
.logic-line span:last-child { text-align: right; }

.claim-browser {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(360px, 1.1fr);
  gap: 70px;
  padding-left: 80px;
}
.claim-list { border-top: 1px solid var(--line-light); }
.claim-list button {
  display: grid;
  grid-template-columns: 65px 1fr;
  gap: 18px;
  align-items: baseline;
  width: 100%;
  min-height: 74px;
  padding: 18px 0;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  cursor: pointer;
}
.claim-list button span { color: var(--faint); font: 10px var(--mono); }
.claim-list button strong { font: 500 1rem/1.35 var(--sans); }
.claim-list button:hover strong,
.claim-list button.active strong { color: var(--white); }
.claim-list button.active span { color: var(--orange); }
.claim-detail {
  min-height: 380px;
  padding: 36px 0 36px 38px;
  border-left: 2px solid var(--orange);
}
.claim-detail > div { display: flex; justify-content: space-between; gap: 30px; color: var(--muted); font: 10px var(--mono); }
.claim-detail > div b { color: var(--orange); font-weight: 600; }
.claim-detail h3 { max-width: 560px; margin: 65px 0 30px; font: 500 clamp(1.8rem, 3.3vw, 3rem)/1.12 var(--serif); letter-spacing: -.03em; }
.claim-formula { padding: 17px 0; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); color: var(--white) !important; font: 13px var(--mono); }
.claim-detail > p:not(.claim-formula) { color: var(--muted); }
.claim-detail small { display: block; margin-top: 45px; color: var(--faint); font: 10px var(--mono); }
.claim-detail[data-current="termination"] { border-color: var(--pink); }
.claim-detail[data-current="termination"] > div b { color: var(--pink); }
.claim-detail[data-current="lean"] { border-color: var(--violet); }
.claim-detail[data-current="lean"] > div b { color: var(--violet); }
.claim-detail[data-current="orbit"] { border-color: var(--blue); }
.claim-detail[data-current="orbit"] > div b { color: var(--blue); }

.failure-notes { margin: 110px 0 0 80px; }
.failure-notes h3 { margin: 0 0 30px; font: 500 1.35rem var(--serif); }
.failure-notes ul { display: grid; grid-template-columns: repeat(2, 1fr); margin: 0; padding: 0; border-top: 1px solid var(--line-light); list-style: none; }
.failure-notes li { display: grid; grid-template-columns: 35px 1fr; gap: 15px; padding: 26px 28px 26px 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.failure-notes li:nth-child(even) { padding-left: 28px; border-right: 0; }
.failure-notes li span { color: var(--faint); font: 10px var(--mono); }
.failure-notes li p { margin: 0; color: var(--muted); font-size: 14px; }
.failure-notes li b { color: var(--white); font-weight: 600; }

.edge-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 60px;
  align-items: start;
  margin-left: 80px;
}
.edge-intro p { max-width: 760px; margin: 0; color: #c3bfb8; font: 1.15rem/1.65 var(--serif); }
.edge-formula {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto auto;
  gap: 11px;
  align-items: center;
  margin: 65px 0 22px 80px;
  padding: 30px 0;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
  font: 400 clamp(1.3rem, 2.75vw, 2.4rem)/1.15 var(--serif);
  letter-spacing: -.025em;
}
.edge-formula i { color: var(--faint); font-style: normal; }
.edge-formula strong { color: var(--orange); font-weight: 400; }
.formula-key { display: flex; gap: 32px; margin-left: 80px; color: var(--muted); font: 10px var(--mono); }
.formula-key b { color: var(--white); }
.edge-explain { max-width: 720px; margin: 55px 0 90px 80px; color: var(--muted); }

.budget-figure { margin: 0 0 0 80px; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.budget-figure figcaption {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.budget-figure figcaption h3 { margin: 5px 0 0; font-size: 1rem; font-weight: 600; }
.budget-figure figcaption p { margin: 0; color: var(--muted); font: 10px var(--mono); }
.budget-chart {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  align-items: end;
  height: 300px;
  padding-top: 42px;
}
.budget-chart::before, .budget-chart::after {
  content: "";
  position: absolute;
  right: 0;
  left: 0;
  border-top: 1px solid var(--line);
}
.budget-chart::before { top: 50%; }
.budget-chart::after { bottom: 0; }
.threshold { position: absolute; z-index: 0; top: 41px; right: 0; left: 0; border-top: 1px solid var(--muted); }
.threshold span { position: absolute; right: 0; top: -19px; color: var(--muted); font: 9px var(--mono); }
.budget-point {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 258px;
  padding: 0;
  color: var(--faint);
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  font: 9px var(--mono);
  cursor: pointer;
}
.budget-point:last-child { border-right: 0; }
.budget-point i { display: block; width: 16px; height: max(2px, var(--height)); margin-bottom: 11px; background: var(--ink); }
.budget-point.active { color: var(--white); }
.budget-point.active i { width: 22px; }
.budget-readout {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 20px;
  align-items: baseline;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.budget-readout > span { color: var(--orange); font: 10px var(--mono); }
.budget-readout > strong { font: 500 1.6rem var(--serif); }
.budget-readout p { margin: 0; color: var(--muted); font: 10px var(--mono); text-align: right; }
.audit-boundary { margin: 0; padding: 24px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.audit-boundary b { color: var(--white); }

.method-copy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  margin-left: 80px;
}
.method-copy p { margin: 0; color: #b7b3ad; font: 1.1rem/1.65 var(--serif); }
.method-line {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 70px 0 0 80px;
  padding: 22px 0;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
  color: var(--white);
  font: 11px var(--mono);
}
.method-line i { color: var(--orange); font-style: normal; }

.sources { padding: 85px 0 110px; border-top: 1px solid var(--line-light); }
.sources > header { display: flex; justify-content: space-between; padding-bottom: 24px; color: var(--muted); font: 11px var(--mono); }
.sources header p { margin: 0; }
.sources ul { margin: 0; padding: 0; border-top: 1px solid var(--line-light); list-style: none; }
.sources a {
  display: grid;
  grid-template-columns: 180px 1fr 30px;
  gap: 20px;
  align-items: center;
  min-height: 72px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
}
.sources a span { font: 10px var(--mono); }
.sources a strong { color: var(--white); font-weight: 500; }
.sources a i { color: var(--orange); font-style: normal; text-align: right; }
.sources a:hover strong { color: var(--orange); }

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 82px;
  padding: 0 max(24px, calc((100vw - var(--page)) / 2));
  color: var(--faint);
  border-top: 1px solid var(--line);
  font: 10px var(--mono);
}
.site-footer span:nth-child(2) { color: var(--muted); }
.site-footer a { justify-self: end; color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--orange); }

.not-found { width: min(calc(100% - 48px), var(--page)); min-height: 100vh; margin: auto; padding: 120px 0; }
.not-found-code { display: flex; gap: 14px; color: var(--faint); font: 500 15px var(--mono); }
.not-found-code span:nth-child(2) { color: var(--orange); }
.not-found-copy { max-width: 720px; margin-top: 100px; }
.not-found-copy > span { color: var(--orange); font: 10px var(--mono); }
.not-found-copy h1 { margin: 25px 0; font: 500 clamp(3rem, 7vw, 6rem)/1 var(--serif); letter-spacing: -.05em; }
.not-found-copy p { color: var(--muted); }
.not-found-copy a { display: inline-block; margin-top: 28px; color: var(--orange); font: 11px var(--mono); }

@media (max-width: 850px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .intro-copy, .problem-layout, .claim-browser, .method-copy { grid-template-columns: 1fr; gap: 42px; }
  .problem-layout, .claim-browser, .failure-notes, .edge-intro, .edge-formula, .formula-key, .edge-explain, .budget-figure, .method-copy, .method-line { margin-left: 0; padding-left: 0; }
  .section-heading { grid-template-columns: 55px 1fr; }
  .plain-question { max-width: 520px; }
  .claim-detail { min-height: auto; }
  .edge-formula { grid-template-columns: 1fr; gap: 7px; }
  .formula-key { flex-wrap: wrap; }
}

@media (max-width: 600px) {
  main { width: min(calc(100% - 36px), var(--page)); }
  .site-header { min-height: 58px; padding: 0 18px; }
  .brief-link { font-size: 10px; }
  .intro { padding: 75px 0 70px; }
  .intro h1 { margin: 32px 0 45px; font-size: clamp(3rem, 15vw, 4.7rem); }
  .intro-copy { gap: 24px; }
  .intro-links { flex-direction: column; align-items: flex-start; gap: 17px; }
  .sequence-lab { margin-bottom: 85px; }
  .sequence-lab > header { align-items: start; }
  .sequence-row { grid-template-columns: repeat(5, 1fr); gap: 3px; padding: 33px 0; }
  .sequence-row > i { display: none; }
  .sequence-row button { min-width: 0; padding: 7px; }
  .sequence-row button strong { font-size: 2rem; }
  .sequence-readout { grid-template-columns: 1fr auto; gap: 8px; }
  .sequence-readout > span:nth-child(3) { grid-row: 2; }
  .sequence-readout button { grid-column: 2; grid-row: 1 / 3; }
  .note-section { padding: 70px 0 90px; }
  .section-heading { display: block; margin-bottom: 50px; }
  .section-heading h2 { margin-top: 15px; font-size: 2.6rem; }
  .formula { font-size: 2.5rem; }
  .logic-line { grid-template-columns: 1fr 1fr; gap: 15px; }
  .logic-line i { grid-column: 1 / -1; }
  .logic-line span:last-child { text-align: left; }
  .claim-browser { gap: 48px; }
  .claim-detail { padding: 26px 0 26px 22px; }
  .claim-detail h3 { margin-top: 45px; }
  .failure-notes ul { grid-template-columns: 1fr; }
  .failure-notes li, .failure-notes li:nth-child(even) { padding: 24px 0; border-right: 0; }
  .edge-intro { grid-template-columns: 1fr; gap: 24px; }
  .edge-formula { font-size: 1.75rem; }
  .formula-key { display: grid; gap: 0; }
  .budget-figure figcaption { display: block; }
  .budget-figure figcaption p { margin-top: 14px; }
  .budget-chart { height: 270px; }
  .budget-point { height: 228px; }
  .budget-readout { grid-template-columns: 65px 1fr; }
  .budget-readout p { grid-column: 2; text-align: left; }
  .method-copy { gap: 26px; }
  .method-line { flex-wrap: wrap; justify-content: flex-start; }
  .sources > header { display: block; }
  .sources header p { margin-top: 7px; }
  .sources a { grid-template-columns: 1fr 25px; gap: 6px; padding: 17px 0; }
  .sources a span { grid-column: 1; }
  .sources a strong { grid-column: 1; }
  .sources a i { grid-column: 2; grid-row: 1 / 3; }
  .site-footer { grid-template-columns: 1fr auto; padding: 18px; }
  .site-footer span:nth-child(2) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

@media print {
  :root { --black: #fff; --black-2: #fff; --white: #111; --muted: #444; --faint: #666; --line: #bbb; --line-light: #777; }
  html, body { color: #111; background: #fff; color-scheme: light; }
  .site-header { position: static; }
  .brief-link, .intro-links, .sequence-readout button { display: none; }
  a { text-decoration: none; }
  .note-section, .sequence-lab { break-inside: avoid; }
}