@font-face {
  font-family: 'PP';
  src: url('fonts/PPNeueMontreal-Book.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'PP';
  src: url('fonts/PPNeueMontreal-BookItalic.woff2') format('woff2');
  font-weight: 400; font-style: italic; font-display: swap;
}
@font-face {
  font-family: 'PP';
  src: url('fonts/PPNeueMontreal-Medium.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'PP';
  src: url('fonts/PPNeueMontreal-Thin.woff2') format('woff2');
  font-weight: 100; font-style: normal; font-display: swap;
}

:root {
  --bg: #FFFFFF;
  --ink: #000000;
  --gray-text: #757171;
  --gray-border: #E6E6E6;
  --gray-bg: #FAFAFA;
  --accent: #17CFB9;  --accent-dark: #0FA995;  --accent-soft: #D7F3EF;  --teal-pale: #99F6E4;  --teal-wash: #F0FDF9;
  --sand-pale: #E9DDBE;  --sand-wash: #FAF5E9;
  --sand-mark: #F3E5B5;  --blue-pale: #BAE6FD;  --blue-wash: #F0F9FF;
  --red: #CF2E2E;
  --red-soft: #FBEFED;

  --sans: 'PP', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --ease: cubic-bezier(.22, .61, .36, 1);

  --gutter: clamp(16px, 1.6vw, 24px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

strong, b, text[font-weight="bold"] { font-weight: 500; }

a { color: inherit; }

p a, li a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--gray-bg);
  border-bottom: 1px solid var(--gray-border);
}

.site-header .inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  align-items: center;
  gap: 28px;
}

.wordmark {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 18px;
}

.logo-apollo { height: 30px; width: auto; display: block; }
.logo-openai { height: 20px; width: auto; display: block; opacity: .7; }

.logo-x {
  width: 1px;
  height: 24px;
  background: #333333;
  align-self: center;
  display: inline-block;
}

.wordmark .site-name {
  font-size: 27px;
  font-weight: 400;
  letter-spacing: .01em;
  color: var(--ink);
  padding-left: 18px;
  line-height: 1;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav { gap: 26px; }

.site-nav a {
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 6px 2px;
  transition: color .15s var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 7px;
  outline: none;
}

.site-nav a.active {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 7px;
}

.site-nav a.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1.5px solid var(--accent);
  border-radius: 10px;
  background: var(--accent-soft);
  line-height: 1;
}

.site-nav a.nav-cta:hover,
.site-nav a.nav-cta:focus-visible {
  text-decoration: none;
  background: #bfeae2;
}

.site-nav a.nav-cta svg {
  width: 12px;
  height: 12px;
  display: block;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.nav-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: transform .3s var(--ease);
}

.nav-toggle:focus-visible { outline: 1px solid var(--ink); outline-offset: 4px; }

.nav-open .nav-toggle .bar:first-child { transform: translateY(4px) rotate(45deg); }
.nav-open .nav-toggle .bar:last-child { transform: translateY(-4px) rotate(-45deg); }

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 72px var(--gutter) 48px;
}

.hero { text-align: center; }

.hero .dek {
  margin-left: auto;
  margin-right: auto;
}

.dek-lead {
  font-size: 24px;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: .005em;
  max-width: 54ch;
  margin: 0 auto 18px;
}

.hero .btn-row,
.section > .btn-row { justify-content: center; }

.eyebrow {
  font-size: 13.5px;
  color: var(--gray-text);
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-align: center;
  margin: 0 0 28px;
  display: block;
}

.eyebrow::before { display: none; content: none; }

.section-number { display: none; }

h1 {
  font-weight: 100;
  font-size: clamp(40px, 5vw, 56px);
  line-height: 1.08;
  letter-spacing: .01em;
  margin: 0 0 28px;
  text-align: center;
  text-wrap: balance;
}

h1 em { font-style: normal; }

h2 {
  font-weight: 100;
  font-size: clamp(28px, 3.2vw, 38px);
  letter-spacing: .01em;
  line-height: 1.14;
  margin: 0 0 22px;
  text-align: center;
  text-wrap: balance;
}

h2.section-title {
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1.1;
  margin: 0 0 26px;
}

h3 {
  font-weight: 400;
  font-size: clamp(21px, 2.2vw, 26px);
  letter-spacing: 0;
  line-height: 1.2;
  margin: 56px 0 14px;
  text-align: center;
  text-wrap: balance;
}

h4 {
  font-weight: 400;
  font-size: 18px;
  letter-spacing: .005em;
  line-height: 1.3;
  margin: 36px 0 10px;
}

h5 {
  font-weight: 500;
  font-size: 13px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gray-text);
  line-height: 1.4;
  margin: 28px 0 8px;
}

.center { text-align: center; }

.statement {
  font-weight: 400;
  font-size: clamp(21px, 2.2vw, 26px);
  letter-spacing: .015em;
  line-height: 1.25;
  text-align: center;
  text-wrap: balance;
  max-width: 44ch;
  margin: 56px auto 8px;
}

.dek {
  font-size: 18px;
  line-height: 1.4;
  color: var(--ink);
  max-width: 64ch;
  margin: 0 0 30px;
}

.page-intro {
  text-align: center;
  max-width: 64ch;
  margin-left: auto;
  margin-right: auto;
}

.section { margin: 96px 0 0; scroll-margin-top: 90px; }

.closing-cta { margin-top: 72px; text-align: center; }
.closing-cta .btn-row { justify-content: center; }
.closing-cta .closing-open-problems { margin-top: 40px; margin-bottom: 0; }

.about-sub { margin-top: 64px; }

.link-list {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  text-align: center;
}
.link-list li { margin: 0 0 16px; }
.link-list li:last-child { margin-bottom: 0; }

.center-block {
  text-align: left;
  max-width: 62ch;
  margin-left: auto;
  margin-right: auto;
}

.divider { display: none; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 41px;
  height: 41px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  color: var(--ink);
  transition: border-color .15s var(--ease), background .15s var(--ease), color .15s var(--ease);
}

.icon-btn svg { width: 16px; height: 16px; fill: currentColor; display: block; }

.icon-btn:hover,
.icon-btn:focus-visible { border-color: var(--accent); background: var(--accent-soft); color: var(--ink); outline: none; }

.org-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 12px;
}

.org-card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  text-align: left;
  border: 1px solid var(--gray-border);
  border-radius: 4px;
  background: var(--gray-bg);
  padding: 40px 36px 44px;
}

.org-logo-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  min-height: 44px;
  margin: 0 0 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-border);
}

.org-logo { display: block; width: auto; }
.org-logo-apollo { height: 34px; }
.org-logo-openai { height: 24px; }

.org-card .muted { margin: 0 0 28px; }

.org-card .btn-row { justify-content: flex-start; margin-top: auto; }

@media (max-width: 700px) {
  .org-cards { grid-template-columns: 1fr; }
}

p { margin: 0 0 14px; }

.muted { color: var(--ink); }
.small { font-size: 14px; color: var(--gray-text); }

.op-figure { max-width: 100%; height: auto; margin-top: 12px; border: 1px solid var(--gray-border); }

.schematic { margin: 26px auto 0; max-width: 880px; }
.schematic svg { display: block; width: 100%; height: auto; }
.schematic.schematic-stacked { display: none; }

.plot-figure { margin: 26px auto 26px; }

ul.takeaways + .plot-figure { margin-top: 52px; }

.plot-figure.plot-stacked { display: none; }
.plot-figure.plot-bp-stacked { display: none; }
.plot-figure.narrow { max-width: 66.7%; }
.plot-figure svg { display: block; width: 100%; height: auto; }
.op-figure.borderless { border: none; }
.op-figure.narrow {
  max-width: 66.7%;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.section > ul.muted.left {
  text-align: left;
  max-width: none;
  margin-left: 0;
  margin-right: 0;
}

blockquote {
  margin: 16px 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--gray-border);
  color: var(--gray-text);
  font-style: italic;
}

blockquote p { margin: 0; }

code, .mono {
  font-family: var(--mono);
  font-size: .88em;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}

.data-table th, .data-table td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--gray-border);
}

.data-table th {
  font-weight: 500;
  color: var(--gray-text);
  font-size: 12.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.data-table td code { word-break: break-all; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: 10px;
  border: 1.5px solid var(--accent);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  transition: all .15s var(--ease);
  font-family: var(--sans);
}

.btn:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--ink); }

.video-block { margin: 44px auto 0; text-align: center; }

.video-embed {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--gray-border);
  border-radius: 4px;
  overflow: hidden;
  background: #000;
}

.video-embed iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
}

.video-caption {
  font-size: 13px;
  color: var(--gray-text);
  text-align: center;
  margin: 12px auto 0;
  max-width: 64ch;
}

.callout {
  background: var(--gray-bg);
  border: 1px solid var(--gray-border);
  border-radius: 4px;
  padding: 24px 28px;
  margin: 30px 0;
}

.callout.warn { background: var(--red-soft); border-color: var(--red); }

.callout .label {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gray-text);
  margin: 0 0 10px;
}

.pullquote {
  font-weight: 100;  font-size: clamp(26px, 3vw, 36px);
  letter-spacing: .02em;
  line-height: 1.25;
  text-align: center;
  font-style: normal;
  border: 0;
  padding: 10px 0;
  margin: 38px auto;
  max-width: 26ch;
}

ul.takeaways {
  list-style: none;
  padding: 0;
  margin: 30px auto 0;
  max-width: 66ch;
}

ul.takeaways li {
  position: relative;
  padding: 0 0 0 26px;
  margin: 0 0 26px;
  font-size: 18px;
  line-height: 1.5;
}

ul.takeaways li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 5px;
  height: 5px;
  background: var(--ink);
}

.exchange {
  border: 1px solid var(--gray-border);
  border-radius: 4px;
  margin: 34px auto;
  font-size: 15.5px;
  max-width: 760px;
  text-align: left;
}

.exchange .turn:first-child { border-radius: 3px 3px 0 0; }
.exchange .turn:last-child { border-radius: 0 0 3px 3px; }

.exchange .turn {
  position: relative;
  padding: 18px 24px;
  border-top: 1px solid var(--gray-border);
}

.exchange .note {
  position: absolute;
  left: calc(100% + 22px);
  top: 16px;
  width: 200px;
  font-size: 14px;
  font-style: italic;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: 0;
  text-transform: none;
  color: var(--gray-text);
}

.exchange .note::before { content: "\2190\00a0"; font-style: normal; }

@media (max-width: 1260px) {
  .exchange .note { position: static; display: block; width: auto; margin: 0 0 8px; }
  .exchange .note::before { content: "["; font-style: inherit; }
  .exchange .note::after { content: "]"; }
}

.exchange .turn:first-child { border-top: 0; }

.exchange .who {
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #5a5a5a;
  margin: 0 0 6px;
}

.exchange .turn.user { background: var(--gray-bg); }

.exchange .turn.cot {
  background: var(--sand-wash);
  border-left: 3px solid var(--sand-pale);
  font-style: italic;
  color: var(--gray-text);
}

.exchange .turn.cot mark {
  background: var(--sand-mark);
  color: var(--ink);
  padding: 1px 3px;
  border-radius: 2px;
}

.exchange .turn.answer {
  background: var(--blue-wash);
  border-left: 3px solid var(--blue-pale);
  font-size: 17px;
}

.exchange p:last-child { margin-bottom: 0; }

.example-source {
  max-width: 760px;
  margin: -26px auto 34px;
  font-size: 15.5px;
  color: var(--gray-text);
  text-align: left;
}

.cot-toggle {
  display: inline-block;
  margin-top: 4px;
  padding: 0;
  border: 0;
  background: none;
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--gray-text);
  text-decoration: underline;
  text-decoration-color: var(--sand-pale);
  text-underline-offset: 3px;
  cursor: pointer;
}

.cot-toggle:hover { color: var(--ink); }

.stat-metric {
  text-align: center;
  font-size: 17px;
  color: var(--ink);
  margin: 34px 0 0;
}

.stat-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 14px;
  margin: 22px auto 14px;
  max-width: 820px;
}

.belief-word {
  display: inline-block;
  margin-top: 4px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .14em;
}

.belief-word.honest-word { color: #0a8a7a; }
.belief-word.task-word { color: var(--red); }

.flip-connector {
  align-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 0 6px;
}

.flip-connector .flip-arrows {
  font-size: 26px;
  font-weight: 400;
  color: var(--gray-text);
  line-height: 1;
}

.flip-connector .flip-label {
  font-size: 9.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gray-text);
  text-align: center;
  line-height: 1.5;
}

.stat-card {
  border: 1px solid var(--gray-border);
  border-radius: 4px;
  padding: 34px 26px 28px;
  text-align: center;
  background: #fff;
}

.stat-card .belief {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gray-text);
  margin: 0 0 14px;
}

.stat-card .big {
  font-weight: 100;
  font-size: 76px;
  letter-spacing: .01em;
  line-height: 1;
  margin: 0 0 10px;
}

.stat-card.honest .big { color: var(--accent); }
.stat-card.deceptive .big { color: var(--red); }

.stat-card .what {
  font-size: 14.5px;
  color: var(--ink);
  margin: 0;
}

.stat-weld {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gray-text);
  text-align: center;
  margin: 0 0 8px;
}

.site-footer {
  background: var(--gray-bg);
  border-top: 1px solid var(--gray-border);
  margin-top: 36px;
}

.site-footer .inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px var(--gutter) 44px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px 40px;
  align-items: center;
  font-size: 14px;
  color: var(--ink);
}

.site-footer a.footer-brand {
  font-size: 17px;
  border: none;
  border-radius: 0;
  padding: 0;
  text-transform: none;
  letter-spacing: normal;
}

.site-footer a.footer-brand:hover { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 3px; }

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-left: auto;
}

.site-footer a {
  color: var(--ink);
  text-decoration: none;
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  border: 1px solid var(--gray-border);
  border-radius: 999px;
  padding: 5px 14px;
}

.site-footer a:hover { border-color: var(--ink); }

.canary {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--gutter) 44px;
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1.7;
  color: var(--gray-text);
  word-break: break-all;
}

@media (max-width: 860px) {
  .site-header .inner { gap: 14px; padding: 12px var(--gutter); }
  .wordmark { gap: 12px; }
  .wordmark .site-name { display: none; }

  .nav-toggle { display: flex; margin-left: auto; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 16px var(--gutter) 20px;
    background: var(--gray-bg);
    border-bottom: 1px solid var(--gray-border);
  }

  .site-header.nav-open .site-nav { display: flex; }

  .page { padding: 44px var(--gutter) 70px; }
  .section { margin: 64px 0 0; }

  h1 { font-size: 34px; }
  h2.section-title { font-size: 30px; }
  h3 { margin: 40px 0 12px; }
  .dek-lead { font-size: 20px; }
  .dek { font-size: 17px; }

  .hero .dek br { display: none; }

  .op-figure.narrow { max-width: 100%; }
  .plot-figure.narrow { max-width: 100%; }
  .plot-figure.plot-wide { display: none; }
  .plot-figure.plot-stacked { display: block; max-width: 460px; margin-top: 22px; }
  .plot-figure.plot-bp-wide { display: none; }
  .plot-figure.plot-bp-stacked { display: block; max-width: 420px; }
  .schematic.schematic-wide { display: none; }
  .schematic.schematic-stacked { display: block; max-width: 420px; }
  .video-block { margin-top: 32px; }

  .exchange { font-size: 14.5px; }
  .exchange .turn { padding: 14px 16px; }

  .org-card { padding: 28px 20px 32px; }

  .stat-row { grid-template-columns: 1fr; }
  .flip-connector { flex-direction: row; padding: 6px 0; }
  .stat-card .big { font-size: 56px; }

  .site-footer .inner { flex-direction: column; align-items: flex-start; gap: 14px; }
  .site-footer nav { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav,
  .site-header.nav-open .site-nav,
  .nav-toggle .bar { transition: none; }
}