:root {
  --paper: #f2eee3;
  --paper-soft: #faf7ef;
  --ink: #25271f;
  --olive: #3f4934;
  --olive-deep: #283126;
  --rust: #9a4f34;
  --rust-soft: #ead8ce;
  --line: #c9c1ae;
  --line-strong: #918a79;
  --muted: #686b5f;
  --white: #fffdf8;
  --shadow: 0 14px 34px rgba(40, 49, 38, 0.08);
  --sans: "Source Sans 3", Arial, sans-serif;
  --slab: "Roboto Slab", Georgia, serif;
  --content: 1180px;
  --reading: 760px;
  --gutter: clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(63, 73, 52, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 100% 32px;
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

a {
  color: var(--olive-deep);
  text-decoration-color: var(--rust);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

a:hover { color: var(--rust); }

:focus-visible {
  outline: 3px solid var(--rust);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 9px 14px;
  color: var(--white);
  background: var(--olive-deep);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  border-bottom: 1px solid var(--line-strong);
  background: rgba(242, 238, 227, 0.96);
}

.masthead {
  width: calc(100% - (2 * var(--gutter)));
  max-width: var(--content);
  min-height: 88px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 270px 1fr;
  align-items: center;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  width: max-content;
  color: var(--olive-deep);
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 33px;
  height: 33px;
  border: 1px solid var(--olive-deep);
  color: var(--rust);
  font-family: var(--slab);
  font-size: 17px;
  font-weight: 700;
}

.brand-name {
  font-family: var(--slab);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-nav { display: none; }

.site-nav > summary { display: none; }

.desktop-nav,
.site-nav nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 24px;
}

.desktop-nav a,
.site-nav a {
  padding: 9px 0 7px;
  border-bottom: 2px solid transparent;
  color: var(--ink);
  font-size: 15px;
  font-weight: 650;
  line-height: 1.2;
  text-decoration: none;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"],
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--olive-deep);
  border-bottom-color: var(--rust);
}

.shell {
  width: calc(100% - (2 * var(--gutter)));
  max-width: var(--content);
  margin: 0 auto;
}

.home-cover {
  padding: clamp(44px, 6vw, 78px) 0 clamp(52px, 7vw, 88px);
}

.kicker,
.section-label,
.term-code {
  color: var(--rust);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.11em;
  line-height: 1.3;
  text-transform: uppercase;
}

h1, h2, h3 {
  margin: 0;
  color: var(--olive-deep);
  font-family: var(--slab);
  line-height: 1.12;
  text-wrap: balance;
}

h1 {
  max-width: 14ch;
  margin-top: 16px;
  font-size: clamp(44px, 5.2vw, 74px);
  letter-spacing: -0.045em;
}

h2 {
  font-size: clamp(30px, 3.5vw, 46px);
  letter-spacing: -0.035em;
}

h3 {
  font-size: clamp(22px, 2.2vw, 29px);
  letter-spacing: -0.025em;
}

.lede {
  max-width: 38rem;
  margin: 24px 0 0;
  color: #44483d;
  font-size: clamp(19px, 1.7vw, 22px);
  line-height: 1.55;
}

.scope-note {
  max-width: 34rem;
  margin: 30px 0 0;
  padding: 16px 0 0 18px;
  border-left: 3px solid var(--rust);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.home-cover h1 {
  max-width: 16ch;
  font-size: clamp(48px, 6.1vw, 80px);
}

.home-cover-deck {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(270px, 0.65fr);
  gap: clamp(34px, 7vw, 86px);
  align-items: end;
  margin-top: 24px;
}

.home-cover-deck > *,
.image-first-copy > *,
.hero-split-grid > *,
.stacked-deck > *,
.about-cover-copy > * { min-width: 0; }

.home-cover-deck .lede,
.home-cover-deck .scope-note { margin-top: 0; }

.hero-media {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--paper-soft);
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: var(--media-ratio, 16 / 9);
  object-fit: cover;
}

.hero-media-home {
  --media-ratio: 16 / 7;
  margin-top: clamp(30px, 4vw, 48px);
}

.hero-media-home img { object-position: center 49%; }

.corpus-map {
  margin-top: clamp(28px, 4vw, 42px);
  border-top: 2px solid var(--olive-deep);
}

.map-group {
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 24px;
  padding: 23px 0;
  border-bottom: 1px solid var(--line-strong);
}

.map-group h2 {
  padding-top: 4px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.map-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 28px;
}

.map-link {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  align-items: start;
  color: var(--ink);
  text-decoration: none;
}

.map-link strong {
  display: block;
  color: var(--olive-deep);
  font-family: var(--slab);
  font-size: 20px;
  line-height: 1.2;
}

.map-link span:last-child {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.45;
}

.map-link:hover strong { color: var(--rust); }

.map-number {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  color: var(--rust);
  font-weight: 750;
}

.quick-example-section,
.body-section {
  padding: clamp(58px, 8vw, 104px) 0;
  border-top: 1px solid var(--line);
}

.quick-example-grid {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: clamp(36px, 6vw, 76px);
  align-items: start;
}

figcaption {
  padding: 12px 16px 13px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.example-stack {
  margin-top: 30px;
  border-top: 2px solid var(--olive-deep);
}

.example-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 22px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.example-row dt {
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.example-row dd { margin: 0; }

.source-band {
  padding: 34px 0;
  color: #e9eadf;
  background: var(--olive-deep);
}

.source-band .shell {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 34px;
}

.source-band h2 {
  color: var(--white);
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.source-band p { margin: 0; }

.source-band a { color: var(--white); text-decoration-color: #cf876b; }

.hero-image-first,
.hero-split,
.hero-stacked {
  padding: clamp(42px, 6vw, 76px) 0 clamp(38px, 5vw, 64px);
}

.hero-image-first h1,
.hero-split h1,
.hero-stacked h1 {
  max-width: 18ch;
  font-size: clamp(42px, 5.2vw, 68px);
}

.hero-media-threeway {
  --media-ratio: 16 / 6;
}

.hero-media-threeway img { object-position: center 53%; }

.image-first-copy {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(42px, 7vw, 92px);
  align-items: end;
  margin-top: clamp(28px, 4vw, 42px);
}

.hero-split-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(0, 1.04fr);
  gap: clamp(40px, 6vw, 78px);
  align-items: center;
}

.hero-split-settlement .hero-split-grid {
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
}

.hero-split-copy .definition-box { margin-top: 28px; }

.hero-media-totals,
.hero-media-settlement { --media-ratio: 4 / 3; }

.hero-media-totals img { object-position: center 50%; }
.hero-media-settlement img { object-position: center 52%; }

.stacked-copy { max-width: 1060px; }

.stacked-deck {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(38px, 7vw, 88px);
  align-items: end;
  margin-top: 24px;
}

.stacked-deck .lede { margin-top: 0; }

.hero-media-handicap {
  --media-ratio: 16 / 7;
  margin-top: clamp(30px, 4vw, 46px);
}

.hero-media-handicap img { object-position: center 51%; }

.about-cover { padding-bottom: clamp(50px, 7vw, 86px); }

.hero-media-about { --media-ratio: 16 / 5.5; }

.hero-media-about img { object-position: center 44%; }

.about-cover-copy {
  max-width: 920px;
  margin: clamp(28px, 4vw, 42px) auto 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: clamp(34px, 6vw, 68px);
  align-items: end;
}

.about-cover-copy .kicker,
.about-cover-copy h1,
.about-cover-copy .lede { grid-column: 1; }

.about-cover-copy h1 { max-width: 15ch; }
.about-cover-copy .lede { margin-top: 18px; }
.about-cover-copy .definition-box { grid-column: 2; grid-row: 1 / span 3; }

.definition-box {
  padding: 24px;
  border-top: 4px solid var(--rust);
  background: var(--paper-soft);
}

.definition-box strong {
  display: block;
  margin-bottom: 8px;
  color: var(--olive-deep);
  font-family: var(--slab);
  font-size: 22px;
}

.definition-box p { margin: 0; font-size: 16px; line-height: 1.55; }

.anchor-bar {
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: rgba(250, 247, 239, 0.62);
}

.anchor-bar .shell {
  display: flex;
  align-items: center;
  gap: 12px 24px;
  min-height: 58px;
  overflow-x: auto;
}

.anchor-bar span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.anchor-bar a {
  flex: 0 0 auto;
  color: var(--olive-deep);
  font-size: 15px;
  font-weight: 650;
  text-decoration: none;
}

.anchor-bar a:hover { color: var(--rust); }

.article {
  padding: clamp(44px, 7vw, 82px) 0 clamp(64px, 9vw, 116px);
}

.term-row {
  display: grid;
  grid-template-columns: 220px minmax(0, var(--reading));
  gap: clamp(36px, 6vw, 74px);
  justify-content: center;
  padding: 44px 0 52px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 20px;
}

.term-row:first-child { border-top: 0; padding-top: 0; }

.term-label {
  align-self: start;
  padding-top: 7px;
}

.term-label h2 {
  margin-top: 10px;
  font-size: 27px;
}

.term-copy > :first-child { margin-top: 0; }
.term-copy > :last-child { margin-bottom: 0; }
.term-copy p { margin: 0 0 1.15em; }

.term-copy ul,
.term-copy ol {
  margin: 18px 0 24px;
  padding-left: 1.25em;
}

.term-copy li { margin: 9px 0; padding-left: 5px; }

.rule-note,
.caution-note {
  margin: 26px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--olive);
  background: var(--paper-soft);
}

.caution-note { border-left-color: var(--rust); }

.rule-note strong,
.caution-note strong {
  display: block;
  margin-bottom: 5px;
  color: var(--olive-deep);
}

.mini-example {
  margin: 26px 0;
  padding: 24px;
  border: 1px solid var(--line-strong);
  background: var(--white);
}

.mini-example h3 { margin-bottom: 12px; }

.formula-line {
  margin: 18px 0;
  padding: 15px 18px;
  border-left: 3px solid var(--rust);
  background: #e9e2d2;
  font-family: var(--slab);
  font-size: clamp(20px, 2.4vw, 27px);
  font-variant-numeric: tabular-nums;
  line-height: 1.35;
}

.responsive-table {
  width: 100%;
  margin: 28px 0;
  border-collapse: collapse;
  font-size: 16px;
}

.responsive-table th,
.responsive-table td {
  padding: 14px 15px;
  border: 1px solid var(--line-strong);
  text-align: left;
  vertical-align: top;
}

.responsive-table th {
  color: var(--white);
  background: var(--olive-deep);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.responsive-table tbody tr:nth-child(even) { background: rgba(255,255,255,0.42); }

.article-figure {
  margin: 32px 0 36px;
  border: 1px solid var(--line-strong);
  background: var(--paper-soft);
}

.article-figure img { aspect-ratio: 16 / 9; object-fit: cover; }

.sibling-nav {
  padding: 42px 0;
  border-top: 2px solid var(--olive-deep);
}

.sibling-nav h2 {
  margin-bottom: 24px;
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.sibling-links {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 22px;
}

.sibling-links a {
  padding: 15px 0;
  border-top: 1px solid var(--line-strong);
  font-family: var(--slab);
  font-size: 19px;
  line-height: 1.35;
  text-decoration: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(42px, 8vw, 110px);
  align-items: start;
}

.about-grid .term-copy { max-width: var(--reading); }

.principles {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--olive-deep);
}

.principles li {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 15px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-strong);
}

.principles b { color: var(--rust); font-family: var(--slab); }

.site-footer {
  border-top: 1px solid var(--line-strong);
  background: #e5dfd1;
}

.footer-grid {
  width: calc(100% - (2 * var(--gutter)));
  max-width: var(--content);
  margin: 0 auto;
  padding: 36px 0 42px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.footer-grid p { max-width: 42rem; margin: 0; color: var(--muted); font-size: 15px; }

.footer-links { display: flex; justify-content: flex-end; align-items: start; gap: 22px; }
.footer-links a { font-size: 15px; font-weight: 650; }

.not-found {
  min-height: calc(100vh - 210px);
  display: grid;
  grid-template-columns: 0.68fr 1.32fr;
  gap: clamp(42px, 8vw, 110px);
  align-items: center;
  padding: 70px 0 90px;
}

.error-code {
  color: var(--rust);
  font-family: var(--slab);
  font-size: clamp(94px, 16vw, 210px);
  font-weight: 700;
  letter-spacing: -0.08em;
  line-height: 0.8;
}

.not-found h1 { max-width: 12ch; }

.not-found-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 26px;
}

@media (max-width: 1100px) {
  .masthead { grid-template-columns: 220px 1fr; gap: 20px; }
  .desktop-nav,
  .site-nav nav { gap: 15px; }
  .desktop-nav a,
  .site-nav a { font-size: 14px; }
  .image-first-copy,
  .stacked-deck { grid-template-columns: minmax(0, 1fr) 280px; gap: 40px; }
  .about-cover-copy { grid-template-columns: minmax(0, 1fr) 270px; gap: 40px; }
  .term-row { grid-template-columns: 180px minmax(0, var(--reading)); gap: 42px; }
}

@media (max-width: 980px) {
  .hero-split-grid,
  .hero-split-settlement .hero-split-grid { grid-template-columns: 1fr; gap: 34px; }
  .hero-split-copy { max-width: 720px; }
  .hero-media-totals,
  .hero-media-settlement { --media-ratio: 16 / 8; }
}

@media (max-width: 860px) {
  body { font-size: 17px; }
  .masthead { min-height: auto; padding: 20px 0; grid-template-columns: 1fr; gap: 13px; }
  .desktop-nav,
  .site-nav nav { justify-content: flex-start; flex-wrap: wrap; }
  .home-cover-deck,
  .image-first-copy,
  .stacked-deck,
  .about-cover-copy { grid-template-columns: 1fr; gap: 22px; }
  .home-cover-deck .scope-note { margin-top: 2px; }
  .about-cover-copy .kicker,
  .about-cover-copy h1,
  .about-cover-copy .lede,
  .about-cover-copy .definition-box { grid-column: 1; grid-row: auto; }
  .map-links { grid-template-columns: 1fr 1fr; }
  .quick-example-grid { grid-template-columns: 1fr; }
  .source-band .shell { grid-template-columns: 150px 1fr; }
  .definition-box { max-width: 560px; }
  .term-row { grid-template-columns: 150px minmax(0, 1fr); gap: 30px; }
  .sibling-links { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .not-found { grid-template-columns: 1fr; align-content: center; }
}

@media (max-width: 719px) {
  :root { --gutter: 18px; }
  body { font-size: 16.5px; line-height: 1.64; }
  .shell,
  .masthead,
  .footer-grid { width: auto; max-width: none; margin-left: var(--gutter); margin-right: var(--gutter); }
  .masthead { grid-template-columns: 1fr auto; align-items: center; padding: 15px 0; }
  .brand-name { font-size: 21px; }
  .brand-mark { width: 30px; height: 30px; }
  .desktop-nav { display: none; }
  .site-nav { display: block; position: relative; }
  .site-nav > summary {
    display: block;
    cursor: pointer;
    color: var(--olive-deep);
    font-size: 15px;
    font-weight: 750;
    list-style: none;
  }
  .site-nav > summary::-webkit-details-marker { display: none; }
  .site-nav > summary::after { content: " +"; color: var(--rust); }
  .site-nav[open] > summary::after { content: " −"; }
  .site-nav nav {
    position: absolute;
    z-index: 20;
    top: calc(100% + 14px);
    right: 0;
    width: min(300px, calc(100vw - 36px));
    padding: 15px 18px 18px;
    border: 1px solid var(--line-strong);
    background: var(--paper-soft);
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav[open] nav { display: flex; }
  .site-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .site-nav a[aria-current="page"] { border-bottom-color: var(--rust); }
  .home-cover,
  .hero-image-first,
  .hero-split,
  .hero-stacked { padding-top: 38px; }
  h1,
  .home-cover h1,
  .hero-image-first h1,
  .hero-split h1,
  .hero-stacked h1 { font-size: clamp(39px, 12vw, 54px); }
  h2 { font-size: clamp(29px, 8.5vw, 38px); }
  .lede { font-size: 18px; }
  .hero-media-home,
  .hero-media-threeway,
  .hero-media-handicap { --media-ratio: 16 / 8; }
  .hero-media-about { --media-ratio: 16 / 7; }
  .hero-media-totals,
  .hero-media-settlement { --media-ratio: 16 / 10; }
  .hero-split-grid > *,
  .hero-split-copy { width: 100%; max-width: 100%; }
  .hero-media figcaption { padding: 10px 12px 11px; font-size: 13px; }
  .map-group { grid-template-columns: 1fr; gap: 14px; padding: 21px 0; }
  .map-links { grid-template-columns: 1fr; gap: 20px; }
  .map-link { grid-template-columns: 42px 1fr; }
  .source-band .shell { grid-template-columns: 1fr; gap: 11px; }
  .definition-box { padding: 20px; }
  .anchor-bar .shell { min-height: 54px; gap: 10px 18px; }
  .term-row { grid-template-columns: 1fr; gap: 18px; padding: 38px 0 44px; }
  .term-label { padding-top: 0; }
  .term-label h2 { font-size: 27px; }
  .article-figure { margin-left: calc(-1 * var(--gutter)); margin-right: calc(-1 * var(--gutter)); border-left: 0; border-right: 0; }
  .responsive-table,
  .responsive-table tbody,
  .responsive-table tr,
  .responsive-table td { display: block; width: 100%; }
  .responsive-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .responsive-table tr { margin: 0 0 18px; border: 1px solid var(--line-strong); background: var(--paper-soft); }
  .responsive-table td { display: grid; grid-template-columns: 112px 1fr; gap: 12px; padding: 11px 13px; border: 0; border-bottom: 1px solid var(--line); }
  .responsive-table td:last-child { border-bottom: 0; }
  .responsive-table td::before { content: attr(data-label); color: var(--muted); font-size: 12px; font-weight: 750; letter-spacing: 0.05em; text-transform: uppercase; }
  .sibling-links { grid-template-columns: 1fr; gap: 10px; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
  .footer-links { justify-content: flex-start; flex-wrap: wrap; }
  .not-found { min-height: calc(100vh - 170px); padding: 54px 0 70px; gap: 32px; }
}

@media (prefers-reduced-motion: no-preference) {
  .map-link,
  .sibling-links a,
  .site-nav a { transition: color 160ms ease, transform 160ms ease, border-color 160ms ease; }
  .map-link:hover { transform: translateX(3px); }
  .sibling-links a:hover { transform: translateY(-2px); }
}

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