:root {
  color-scheme: light;
  --paper: #faf8f2;
  --ink: #272d29;
  --muted: #697068;
  --accent: #2b5b48;
  --line: #dadfd3;
  --wash: #edf0e7;
  --bar: rgba(250, 248, 242, .96);
  --serif: Charter, "Bitstream Charter", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --paper: #1b211e;
  --ink: #e6e7dd;
  --muted: #afb8aa;
  --accent: #accab4;
  --line: #3c483f;
  --wash: #29342c;
  --bar: rgba(27, 33, 30, .96);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 98px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
::selection { background: var(--accent); color: var(--paper); }
a { color: inherit; text-underline-offset: .22em; }
button { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; border-radius: 2px; }
[hidden] { display: none !important; }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 100; padding: 12px; background: var(--paper); }
.skip-link:focus { top: 12px; }
.reading-progress { height: 3px; position: fixed; top: 0; left: 0; right: 0; z-index: 50; }
#progress-bar { height: 100%; width: 100%; background: var(--accent); transform: scaleX(0); transform-origin: left; }
.topbar { height: 72px; padding: 0 40px; display: flex; justify-content: space-between; align-items: center; gap: 24px; position: sticky; top: 0; z-index: 20; background: var(--bar); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.wordmark { text-decoration: none; font-size: 15px; letter-spacing: -.025em; font-weight: 650; white-space: nowrap; }
.wordmark-dot { color: var(--accent); }
.topbar-actions { display: flex; align-items: center; gap: 24px; font-size: 12px; }
.reading-position { color: var(--muted); font-variant-numeric: tabular-nums; }
.text-button { color: var(--accent); padding: 0; background: none; border: 0; cursor: pointer; text-decoration: none; font-size: inherit; }
.text-button:hover { text-decoration: underline; }
.download-link { white-space: nowrap; }
.download-link span { padding-left: 5px; }
.layout { display: grid; grid-template-columns: 245px minmax(0, 720px); column-gap: 78px; max-width: 1163px; margin: 0 auto; padding: 0 40px; }
.sidebar { min-width: 0; }
.sidebar-inner { position: sticky; top: 104px; max-height: calc(100dvh - 128px); overflow: auto; scrollbar-width: thin; padding: 4px 12px 12px 0; }
.eyebrow { font-size: 10px; line-height: 1.5; text-transform: uppercase; font-weight: 600; letter-spacing: .16em; color: var(--muted); }
.contents-label { margin: 0 0 20px 10px; }
.toc { list-style: none; padding: 0; margin: 0; }
.toc li { margin: 0 0 3px; }
.toc li.toc-overview { margin-bottom: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.toc a { display: grid; grid-template-columns: 21px 1fr; column-gap: 12px; padding: 9px 10px; text-decoration: none; font-size: 12px; line-height: 1.45; color: var(--muted); border-radius: 4px; }
.toc a:hover { color: var(--ink); background: var(--wash); }
.toc a[aria-current="location"] { color: var(--accent); background: var(--wash); }
.nav-number { font-size: 10px; font-variant-numeric: tabular-nums; letter-spacing: .04em; padding-top: 1px; }
.sidebar-footer { display: flex; justify-content: space-between; margin: 25px 10px 0; padding-top: 16px; border-top: 1px solid var(--line); font-size: 10px; color: var(--muted); }
main { min-width: 0; }
.essay-header { padding: 65px 0 0; margin-bottom: 54px; }
.edition { margin: 0 0 25px; color: var(--accent); }
.edition span { padding: 0 11px; opacity: .5; }
h1, h2, .subtitle { font-family: var(--serif); font-weight: 400; }
h1 { font-size: clamp(48px, 5.4vw, 74px); line-height: 1.03; letter-spacing: -.047em; margin: 0 0 16px; }
.subtitle { font-size: 29px; line-height: 1.3; letter-spacing: -.02em; color: var(--accent); margin: 0 0 32px; }
.byline p { font-size: 12px; line-height: 1.8; margin: 0; color: var(--muted); }
.byline strong { font-weight: 500; color: var(--ink); }
.byline span { padding: 0 6px; }
.essay-meta { display: flex; flex-wrap: wrap; gap: 10px 21px; font-size: 10px; letter-spacing: .04em; color: var(--muted); margin-top: 27px; padding: 20px 0; border-block: 1px solid var(--line); }
.essay-meta a { text-decoration: none; color: var(--accent); }
.essay-meta a:hover { text-decoration: underline; }
.short-version { scroll-margin-top: 24px; margin-bottom: 65px; }
.argument-map-intro { scroll-margin-top: 24px; margin-bottom: 65px; padding-bottom: 38px; border-bottom: 1px solid var(--line); }
.map-preview { margin-top: 25px; }
.map-preview-root { display: block; padding: 16px 20px; border: 1px solid var(--accent); border-radius: 5px; background: var(--wash); text-align: center; text-decoration: none; font: 21px/1.35 var(--serif); }
.map-preview-root:hover { text-decoration: underline; }
.map-preview-join { position: relative; height: 48px; text-align: center; font-size: 10px; line-height: 48px; color: var(--muted); }
.map-preview-join::before { content: ''; position: absolute; top: 0; bottom: 0; left: 50%; border-left: 1px solid var(--line); }
.map-preview-join span { position: relative; background: var(--paper); padding: 4px 10px; }
.map-preview-branches { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.map-preview-branches::before { content: ''; position: absolute; left: 25%; right: 25%; top: -10px; height: 10px; border-top: 1px solid var(--line); border-inline: 1px solid var(--line); pointer-events: none; }
.map-preview-branches > a { display: flex; flex-direction: column; gap: 10px; padding: 16px; text-decoration: none; border: 1px solid var(--line); border-radius: 5px; }
.map-preview-branches > a:hover { border-color: var(--accent); background: var(--wash); }
.map-preview-branches > a > span:first-child { font-size: 10px; color: var(--muted); line-height: 1.5; }
.map-preview-branches strong { font: 500 15px/1.4 var(--sans); }
.map-preview-action { color: var(--accent); font-size: 11px; line-height: 1.5; margin-top: auto; }
.map-preview-link { display: flex; flex-wrap: wrap; gap: 12px 25px; margin: 21px 0 0; font-size: 12px; color: var(--accent); }
.outline-introduction, .argument-steps > li > p:not(.argument-references) { font: 19px/1.6 var(--serif); margin: 0 0 15px; overflow-wrap: break-word; }
.outline-skip, .outline-continue { font-size: 12px; color: var(--accent); }
.outline-skip { display: inline-block; margin-bottom: 28px; }
.argument-steps { padding: 0; margin: 0; list-style: none; counter-reset: argument-step; }
.argument-steps > li { position: relative; padding: 0 0 0 39px; margin: 0 0 30px; counter-increment: argument-step; }
.argument-steps > li::before { content: counter(argument-step, decimal-leading-zero); position: absolute; left: 0; top: 3px; color: var(--accent); font-size: 11px; line-height: 1.6; font-variant-numeric: tabular-nums; }
.argument-steps h3 { font: 550 15px/1.45 var(--sans); margin: 0 0 9px; color: var(--ink); }
.argument-references { display: flex; gap: 8px 14px; flex-wrap: wrap; align-items: baseline; font: 11px/1.6 var(--sans); margin: 0; color: var(--accent); }
.argument-references > span { color: var(--muted); }
.argument-references a { text-decoration-color: var(--line); }
.argument-references a:hover { text-decoration-color: currentColor; }
.outline-continue { border-top: 1px solid var(--line); padding-top: 22px; margin: 34px 0 0; }
.chapter { scroll-margin-top: 24px; }
.chapter + .chapter { margin-top: 65px; padding-top: 36px; border-top: 1px solid var(--line); }
.chapter-header { margin-bottom: 26px; }
.chapter-kicker { display: flex; justify-content: space-between; align-items: center; margin: 0 0 13px; color: var(--muted); font: 10px/1.5 var(--sans); letter-spacing: .1em; text-transform: uppercase; }
.chapter-kicker span:first-child { color: var(--accent); }
.chapter-kicker span:last-child { letter-spacing: .02em; text-transform: none; }
h2 { margin: 0; font-size: 33px; line-height: 1.18; letter-spacing: -.026em; text-wrap: balance; }
p[data-essay-paragraph] { font-family: var(--serif); font-size: 20px; line-height: 1.66; margin: 0 0 1.15em; overflow-wrap: break-word; }
.mobile-contents { display: none; }
.essay-footer { border-top: 1px solid var(--line); margin: 64px 0 0; padding: 30px 0 66px; display: grid; grid-template-columns: 30px 1fr auto; align-items: start; gap: 12px; }
.end-mark { color: var(--accent); font-size: 26px; line-height: 1.1; }
.essay-footer p { font-size: 12px; line-height: 1.8; margin: 0; }
.essay-footer p span { color: var(--muted); }
.essay-footer > div { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; font-size: 11px; color: var(--accent); }
.essay-footer a { text-decoration: none; }
.essay-footer a:hover { text-decoration: underline; }

@media (min-width: 1500px) {
  .layout { max-width: 1290px; grid-template-columns: 260px minmax(0, 750px); column-gap: 105px; }
}

@media (max-width: 1050px) and (min-width: 821px) {
  .layout { grid-template-columns: 210px minmax(0, 1fr); column-gap: 40px; padding: 0 30px; }
  .topbar { padding: 0 30px; }
  .toc a { font-size: 11px; }
  h1 { font-size: 58px; }
}

@media (max-width: 820px) {
  html { scroll-padding-top: 133px; }
  .topbar { height: 60px; padding: 0 24px; gap: 16px; }
  .topbar-actions { gap: 18px; }
  .download-link { display: none; }
  .layout { display: block; max-width: 760px; padding: 0 28px; }
  .sidebar { display: none; }
  .essay-header { padding-top: 48px; margin-bottom: 27px; }
  h1 { font-size: 68px; }
  .mobile-contents { display: block; position: sticky; top: 60px; z-index: 10; background: var(--paper); border-block: 1px solid var(--line); margin: 0 0 38px; }
  .mobile-contents summary { min-height: 46px; display: flex; align-items: center; list-style: none; cursor: pointer; color: var(--accent); gap: 14px; font-size: 12px; }
  .mobile-contents summary::-webkit-details-marker { display: none; }
  #mobile-chapter-label { margin-left: auto; color: var(--muted); font-size: 10px; font-variant-numeric: tabular-nums; }
  .chevron { font-size: 17px; line-height: 1; }
  details[open] .chevron { transform: rotate(180deg); }
  .mobile-contents nav { max-height: calc(100dvh - 160px); overflow: auto; padding: 0 0 12px; overscroll-behavior: contain; }
  .mobile-contents .toc { display: grid; grid-template-columns: 1fr 1fr; column-gap: 12px; }
  .mobile-contents .toc-overview { grid-column: 1 / -1; }
  .mobile-contents .toc a { min-height: 43px; }
  .chapter, .short-version, .argument-map-intro { scroll-margin-top: 12px; }
}

@media (max-width: 520px) {
  .topbar { padding: 0 20px; }
  .wordmark { font-size: 13px; }
  .reading-position { display: none; }
  .layout { padding: 0 23px; }
  .essay-header { padding-top: 38px; }
  .edition { font-size: 9px; letter-spacing: .12em; margin-bottom: 24px; }
  .edition span { padding: 0 7px; }
  h1 { font-size: clamp(45px, 11.8vw, 61px); margin-bottom: 14px; }
  .subtitle { font-size: 24px; margin-bottom: 25px; }
  .byline p { font-size: 11px; line-height: 1.8; }
  .essay-meta { gap: 17px; margin-top: 23px; padding: 17px 0; }
  .mobile-contents { margin-bottom: 31px; }
  .mobile-contents .toc { grid-template-columns: 1fr; }
  .mobile-contents .toc a { font-size: 12px; padding: 11px 10px; }
  .chapter + .chapter { margin-top: 48px; padding-top: 29px; }
  .chapter-header { margin-bottom: 22px; }
  .short-version { margin-bottom: 48px; }
  .argument-map-intro { margin-bottom: 48px; padding-bottom: 29px; }
  .map-preview-branches { gap: 10px; }
  .map-preview-branches > a { padding: 12px; }
  .map-preview-branches strong { font-size: 13px; }
  .map-preview-action { font-size: 10px; }
  .outline-introduction, .argument-steps > li > p:not(.argument-references) { font-size: 18px; line-height: 1.6; }
  .argument-steps > li { padding-left: 29px; margin-bottom: 28px; }
  .argument-steps h3 { font-size: 14px; }
  h2 { font-size: 29px; }
  p[data-essay-paragraph] { font-size: 19px; line-height: 1.64; }
  .essay-footer { grid-template-columns: 26px 1fr; padding-bottom: 42px; }
  .essay-footer > div { grid-column: 2; margin-top: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media print {
  :root, html[data-theme="dark"] { color-scheme: light; --paper: #fff; --ink: #111; --muted: #555; --accent: #234735; --line: #ccc; }
  @page { margin: 20mm 19mm; }
  .topbar, .sidebar, .reading-progress, .mobile-contents, .skip-link, .essay-footer > div { display: none !important; }
  .layout { display: block; max-width: none; padding: 0; }
  .essay-header { padding: 0; margin-bottom: 30px; }
  h1 { font-size: 46pt; }
  .subtitle { font-size: 22pt; }
  h2 { font-size: 20pt; }
  p[data-essay-paragraph] { font-size: 11pt; line-height: 1.5; orphans: 3; widows: 3; }
  .outline-introduction, .argument-steps > li > p:not(.argument-references) { font-size: 11pt; line-height: 1.5; orphans: 3; widows: 3; }
  .outline-skip, .outline-continue { display: none; }
  .argument-steps h3 { break-after: avoid; }
  .argument-references { break-before: avoid; }
  .chapter-header { break-inside: avoid; break-after: avoid; }
  .chapter + .chapter { margin-top: 27px; padding-top: 24px; }
  .chapter-kicker span:last-child { display: none; }
  .essay-footer { margin-top: 25px; padding-bottom: 0; }
}