:root {
  color-scheme: light;
  --paper: #f5f5f3;
  --white: #ffffff;
  --ink: #1e1e1e;
  --muted: #5f625f;
  --line: #dedfda;
  --teal: #2a7d6e;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.7;
}

a { color: inherit; }
.site-header {
  padding: 16px 20px;
  background: var(--paper);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
}
.brand {
  color: var(--ink);
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
}
.site-nav { display: flex; gap: 18px; font-size: 13px; }
.site-nav a { text-decoration: none; color: var(--muted); }
.site-nav a:hover { color: var(--ink); }
.hero { padding: 64px 20px 56px; background: var(--paper); }
.hero-inner, .content { max-width: 1100px; margin: 0 auto; }
.eyebrow, .meta, .label {
  color: var(--teal);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}
h1, h2 { font-family: Georgia, 'Times New Roman', serif; font-weight: 500; line-height: 1.08; }
h1 { max-width: 940px; margin: 20px 0 0; font-size: clamp(2.2rem, 6vw, 4.8rem); letter-spacing: -.035em; }
h2 { margin: 0 0 14px; font-size: clamp(1.55rem, 3vw, 2.5rem); letter-spacing: -.02em; }
.summary { max-width: 780px; margin: 24px 0 0; color: #404541; font-size: 18px; }
.meta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; color: var(--muted); letter-spacing: .1em; }
.content { display: grid; grid-template-columns: minmax(190px, .65fr) minmax(0, 1.35fr); gap: 72px; padding: 64px 20px 80px; }
.answer-column { align-self: start; }
.answer { align-self: start; position: sticky; top: 24px; padding: 24px; background: var(--paper); border-left: 3px solid var(--teal); }
.answer p { margin: 12px 0 0; font-size: 16px; font-weight: 600; line-height: 1.7; }
.article-outline { margin-top: 36px; padding-top: 22px; border-top: 1px solid var(--line); }
.article-outline ol { margin: 14px 0 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.article-outline li + li { margin-top: 10px; }
.article-outline a { text-decoration: none; text-underline-offset: 4px; }
.article-outline a:hover { color: var(--teal); text-decoration: underline; }
.article-body { display: grid; gap: 44px; }
.article-section { border-bottom: 1px solid var(--line); padding-bottom: 36px; }
.article-section:last-child { border-bottom: 0; }
.article-section p { margin: 0; color: #404541; font-size: 17px; }
.article-section h3 { margin: 0 0 10px; font-family: Arial, Helvetica, sans-serif; font-size: 18px; line-height: 1.35; }
.article-figure { margin: 0; padding: 24px; border: 1px solid var(--line); background: var(--paper); }
.article-figure figcaption { max-width: 62ch; margin-top: 22px; color: var(--muted); font-size: 14px; line-height: 1.6; }
.diagram-frame { overflow: hidden; }
.diagram-kicker, .path-label { color: var(--teal); font-size: 11px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.node-index { display: inline-grid; place-items: center; width: 28px; height: 28px; flex: 0 0 28px; border: 1px solid currentColor; border-radius: 50%; color: var(--teal); font-size: 10px; font-weight: 700; letter-spacing: .04em; line-height: 1; }
.argument-map { display: grid; gap: 18px; }
.argument-question { position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 14px; padding: 18px 20px; border: 1px solid var(--ink); background: var(--white); }
.argument-question::after { position: absolute; right: 50%; bottom: -19px; width: 1px; height: 18px; background: var(--ink); content: ''; }
.argument-question strong { font-family: Georgia, 'Times New Roman', serif; font-size: clamp(1.35rem, 3vw, 2rem); font-weight: 500; letter-spacing: -.025em; line-height: 1.08; }
.argument-rails { position: relative; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.argument-rails::after { position: absolute; top: 50%; left: 50%; width: 18px; height: 1px; background: var(--ink); content: ''; transform: translateX(-50%); }
.argument-rail { position: relative; padding: 20px; border: 1px solid var(--line); background: var(--white); }
.argument-rail::after { position: absolute; right: 50%; bottom: -19px; width: 1px; height: 18px; background: var(--ink); content: ''; }
.argument-rail-accent { border-color: var(--teal); background: #edf4f1; }
.rail-head { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; padding-bottom: 15px; border-bottom: 1px solid var(--line); }
.rail-head strong { font-family: Georgia, 'Times New Roman', serif; font-size: 23px; font-weight: 500; letter-spacing: -.02em; }
.argument-nodes { display: grid; gap: 9px; margin: 16px 0 0; padding: 0; list-style: none; }
.argument-nodes li { display: flex; align-items: center; gap: 12px; min-height: 58px; padding: 10px 12px; background: var(--paper); }
.argument-nodes li > span:last-child { display: grid; gap: 2px; }
.argument-nodes strong, .loop-stage strong, .handoff-node strong { font-family: Georgia, 'Times New Roman', serif; font-size: 18px; font-weight: 500; letter-spacing: -.015em; line-height: 1.1; }
.argument-nodes small, .loop-stage small, .loop-core small, .handoff-node small { color: var(--muted); font-size: 12px; line-height: 1.35; }
.argument-outcome { position: relative; display: grid; justify-items: center; gap: 7px; max-width: 390px; margin: 0 auto; padding: 17px 22px; border: 1px solid var(--ink); background: var(--ink); color: var(--white); text-align: center; }
.argument-outcome::before { position: absolute; top: -19px; width: 1px; height: 18px; background: var(--ink); content: ''; }
.argument-outcome .diagram-kicker { color: #b9d8cf; }
.argument-outcome strong { font-family: Georgia, 'Times New Roman', serif; font-size: 20px; font-weight: 500; line-height: 1.1; }
.loop-map { padding: 10px 0 18px; }
.loop-orbit { position: relative; min-height: 342px; padding: 34px 14px 22px; border: 1px dashed var(--muted); border-radius: 48% / 22%; background: var(--white); }
.loop-orbit::before { position: absolute; inset: 24px 7%; border: 1px solid var(--line); border-radius: 48% / 25%; content: ''; }
.loop-stages { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); align-items: center; gap: 8px; min-height: 282px; margin: 0; padding: 0; list-style: none; }
.loop-stage { position: relative; display: grid; align-content: start; gap: 8px; min-height: 142px; padding: 15px 12px; border: 1px solid var(--line); background: var(--paper); }
.loop-stage:nth-child(1), .loop-stage:nth-child(5) { transform: translateY(52px); }
.loop-stage:nth-child(2), .loop-stage:nth-child(4) { transform: translateY(14px); }
.loop-stage-accent { border-color: var(--teal); background: #edf4f1; transform: translateY(-14px); }
.loop-stage::after { position: absolute; top: 50%; right: -9px; width: 8px; height: 1px; background: var(--teal); content: ''; }
.loop-stage:last-child::after { display: none; }
.loop-core { position: absolute; z-index: 2; bottom: 12px; left: 50%; display: grid; justify-items: center; gap: 5px; width: 148px; padding: 13px 10px; border: 2px solid var(--ink); border-radius: 50%; background: var(--white); text-align: center; transform: translateX(-50%); }
.loop-core strong { font-family: Georgia, 'Times New Roman', serif; font-size: 19px; font-weight: 500; line-height: 1; }
.loop-core small { font-size: 11px; }
.handoff-map { border: 1px solid var(--line); background: var(--white); }
.handoff-header, .handoff-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 16px; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.handoff-header { border-bottom: 1px solid var(--line); }
.handoff-header span:last-child { color: var(--teal); }
.handoff-track { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); margin: 0; padding: 0; list-style: none; }
.handoff-node { position: relative; display: grid; align-content: start; gap: 9px; min-height: 192px; padding: 17px 14px; border-right: 1px solid var(--line); background: var(--paper); }
.handoff-node:last-child { border-right: 0; }
.handoff-node::after { position: absolute; z-index: 2; top: 50%; right: -5px; width: 9px; height: 9px; border-top: 1px solid var(--teal); border-right: 1px solid var(--teal); background: var(--paper); content: ''; transform: translateY(-50%) rotate(45deg); }
.handoff-node:last-child::after { display: none; }
.handoff-node-accent { background: #edf4f1; }
.handoff-node-accent::after { background: #edf4f1; }
.handoff-node em { align-self: end; color: var(--teal); font-family: 'Courier New', Courier, monospace; font-size: 11px; font-style: normal; letter-spacing: .08em; text-transform: uppercase; }
.handoff-footer { border-top: 1px solid var(--line); }
.handoff-footer strong { color: var(--ink); font-family: Georgia, 'Times New Roman', serif; font-size: 16px; font-weight: 500; letter-spacing: 0; text-transform: none; }
.callout { margin-top: 24px; padding: 20px 22px; border-left: 3px solid var(--teal); background: #edf4f1; }
.callout strong { display: block; font-size: 14px; }
.callout p { margin-top: 8px; font-size: 15px; }
.supporting-link { margin-top: 18px !important; font-size: 15px !important; }
.supporting-link a { color: var(--teal); text-underline-offset: 4px; }
.table-wrap { overflow-x: auto; margin-top: 24px; }
table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 15px; }
th, td { padding: 14px 16px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { background: var(--paper); color: var(--ink); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
tbody th { width: 24%; font-weight: 700; }
td { color: #404541; }
.faq { display: grid; gap: 22px; }
.faq > h2 { margin-bottom: 0; }
.faq section + section { border-top: 1px solid var(--line); padding-top: 22px; }
.faq section p { font-size: 16px; }
ul { margin: 18px 0 0; padding-left: 20px; color: #404541; }
li + li { margin-top: 8px; }
.sources { padding-top: 8px; }
.sources a { color: var(--teal); text-underline-offset: 4px; }
.next { padding: 48px 20px; background: var(--paper); }
.next-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; max-width: 1100px; margin: 0 auto; }
.button { display: inline-flex; padding: 12px 18px; border-radius: 999px; background: var(--ink); color: white; font-size: 12px; font-weight: 700; letter-spacing: .12em; text-decoration: none; text-transform: uppercase; }
.button:hover { background: var(--teal); }
@media (max-width: 760px) {
  .site-header-inner, .next-inner { align-items: flex-start; flex-direction: column; }
  .site-nav { flex-wrap: wrap; }
  .hero { padding-top: 44px; }
  .content { display: block; padding-top: 40px; }
  .answer { position: static; margin-bottom: 48px; }
  .article-outline { margin-bottom: 48px; }
  .article-section p { font-size: 16px; }
  .argument-rails, .loop-stages, .handoff-track { grid-template-columns: 1fr; }
  .argument-rails::after, .argument-rail::after, .argument-question::after, .argument-outcome::before, .loop-stage::after, .handoff-node::after { display: none; }
  .argument-rail { padding: 18px; }
  .loop-orbit { min-height: 0; padding: 16px; border-radius: 18px; }
  .loop-orbit::before { display: none; }
  .loop-stages { gap: 8px; min-height: 0; }
  .loop-stage, .loop-stage:nth-child(1), .loop-stage:nth-child(2), .loop-stage:nth-child(4), .loop-stage:nth-child(5), .loop-stage-accent { min-height: 0; transform: none; }
  .loop-core { position: static; width: auto; margin: 16px 0 0; border-radius: 0; transform: none; }
  .handoff-node { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .handoff-node:last-child { border-bottom: 0; }
  .handoff-header, .handoff-footer { align-items: flex-start; flex-direction: column; gap: 7px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}