@import url("https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=DM+Sans:wght@400;500;600;700&family=Source+Serif+4:opsz,wght@8..60,500;8..60,600;8..60,700&display=swap");

:root {
  --ink: #142522;
  --ink-soft: #51645f;
  --paper: #f5f0e6;
  --paper-deep: #e9e0d0;
  --surface: #fffdf8;
  --line: #b8c2bc;
  --accent: #d8583d;
  --accent-deep: #8c2f20;
  --accent-soft: #f3c6b7;
  --signal: #f2c94c;
  --dark: #193b35;
  --dark-soft: #b8cec7;
  --measure: 760px;
  --wide: 1180px;
}

body.theme-diagnostic {
  --paper: #f4efe5;
  --paper-deep: #e5ddcf;
  --surface: #fffdf8;
  --accent: #d95836;
  --accent-deep: #8b2c19;
  --accent-soft: #f2c0ac;
  --signal: #f3c94f;
  --dark: #193a35;
  --dark-soft: #b7cdc6;
}

body.theme-toolstrip {
  --paper: #eef3ef;
  --paper-deep: #dce6df;
  --surface: #fbfdf9;
  --accent: #247b6e;
  --accent-deep: #145247;
  --accent-soft: #b9ddd3;
  --signal: #f2b84b;
  --dark: #172f3a;
  --dark-soft: #b9ccd5;
}

body.theme-mask {
  --paper: #f3ede4;
  --paper-deep: #e5d8ca;
  --surface: #fffaf4;
  --accent: #7d55a6;
  --accent-deep: #4d2d70;
  --accent-soft: #d9c8ea;
  --signal: #efb64b;
  --dark: #2a273d;
  --dark-soft: #cbc4dd;
}

body.theme-workflows {
  --paper: #edf3f1;
  --paper-deep: #d9e6e2;
  --surface: #fbfdfc;
  --accent: #0e7784;
  --accent-deep: #07505b;
  --accent-soft: #b4dce0;
  --signal: #e7bd45;
  --dark: #17363d;
  --dark-soft: #b9ced2;
}

body.theme-leadership {
  --paper: #f4efe8;
  --paper-deep: #e6dbcf;
  --surface: #fffdf9;
  --accent: #b64d64;
  --accent-deep: #762a3c;
  --accent-soft: #e8bec8;
  --signal: #e5b84a;
  --dark: #332a36;
  --dark-soft: #d0c4d2;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background:
    radial-gradient(circle at 88% 4%, color-mix(in srgb, var(--accent-soft) 62%, transparent), transparent 28rem),
    var(--paper);
  color: var(--ink);
  font-family: "DM Sans", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.68;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover { text-decoration-thickness: 2px; }

a:focus-visible,
[tabindex="0"]:focus-visible,
summary:focus-visible {
  outline: 4px solid var(--signal);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  z-index: 30;
  top: 12px;
  left: 12px;
  padding: 11px 15px;
  background: var(--signal);
  color: var(--ink);
  font-weight: 700;
  transform: translateY(-180%);
}

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

.shell {
  width: min(var(--wide), calc(100% - 56px));
  margin: 0 auto;
}

.reading {
  width: min(1020px, calc(100% - 56px));
  margin: 0 auto;
}

.measure { max-width: var(--measure); }

.eyebrow {
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.case-header { border-bottom: 1px solid var(--line); }

.case-nav {
  display: flex;
  min-height: 82px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.wordmark,
.back-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  font-weight: 700;
}

.wordmark { text-decoration: none; }

h1,
h2,
h3,
.statement {
  margin-top: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 1080px;
  margin: 22px 0 30px;
  font-size: clamp(3.45rem, 7.8vw, 7.5rem);
  line-height: 0.94;
}

h1 em {
  color: var(--accent-deep);
  font-style: normal;
}

h2 {
  margin-bottom: 24px;
  font-size: clamp(2.55rem, 5.2vw, 5.1rem);
  line-height: 0.98;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(1.65rem, 3vw, 2.75rem);
  line-height: 1.05;
}

p:first-child { margin-top: 0; }
p:last-child { margin-bottom: 0; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(250px, .6fr);
  gap: clamp(48px, 8vw, 120px);
  align-items: end;
  padding: clamp(78px, 10vw, 148px) 0 64px;
}

.hero .eyebrow { color: var(--accent-deep); }

.hero-lede {
  max-width: 820px;
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(1.15rem, 2vw, 1.62rem);
  line-height: 1.48;
}

.hero-mark {
  position: relative;
  min-height: 300px;
  overflow: hidden;
  border: 1px solid var(--ink);
  background: var(--dark);
  color: white;
}

.hero-mark::before {
  position: absolute;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  background: var(--signal);
  content: "";
  right: -64px;
  top: -72px;
}

.hero-mark::after {
  position: absolute;
  width: 180px;
  height: 180px;
  border: 2px solid var(--accent-soft);
  border-radius: 50%;
  content: "";
  left: -68px;
  bottom: -86px;
}

.hero-mark-content {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 300px;
  flex-direction: column;
  justify-content: space-between;
  padding: 30px;
}

.hero-mark strong {
  max-width: 240px;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 2.15rem;
  line-height: 1.02;
}

.hero-mark span:last-child {
  max-width: 240px;
  color: var(--dark-soft);
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0 0 84px;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.facts div {
  min-height: 140px;
  padding: 24px 24px 28px 0;
}

.facts div + div {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.facts div:nth-child(3n + 1) {
  padding-left: 0;
  border-left: 0;
}

.facts div:nth-child(n + 4) { border-top: 1px solid var(--line); }

.facts dt {
  margin-bottom: 10px;
  color: var(--ink-soft);
}

.facts dd {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.38;
}

.section {
  padding: clamp(88px, 10vw, 148px) 0;
}

.section.rule { border-top: 1px solid var(--line); }

.section-head {
  display: grid;
  grid-template-columns: 210px minmax(0, 760px);
  gap: 46px;
  align-items: start;
  margin-bottom: 54px;
}

.section-head .eyebrow {
  padding-top: 12px;
  color: var(--accent-deep);
}

.section-head p,
.body-large {
  color: var(--ink-soft);
  font-size: 1.18rem;
}

.precis {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: clamp(48px, 8vw, 118px);
  align-items: start;
}

.bottom-line {
  padding-top: 18px;
  border-top: 7px solid var(--signal);
}

.bottom-line .eyebrow { color: var(--ink-soft); }
.bottom-line p { font-size: 1.1rem; font-weight: 700; }

.statement {
  margin-bottom: 0;
  font-size: clamp(2.45rem, 4.8vw, 4.75rem);
  line-height: 1.04;
}

.dark-band {
  background: var(--dark);
  color: var(--surface);
}

.dark-band .section-head .eyebrow { color: var(--signal); }
.dark-band .section-head p { color: var(--dark-soft); }

.stakes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid color-mix(in srgb, var(--dark-soft) 45%, transparent);
}

.stake {
  padding: 28px 22px 30px 0;
}

.stake + .stake {
  padding-left: 22px;
  border-left: 1px solid color-mix(in srgb, var(--dark-soft) 45%, transparent);
}

.stake strong {
  display: block;
  margin-bottom: 9px;
  color: var(--signal);
  font-size: 1.05rem;
}

.stake p { margin: 0; color: var(--dark-soft); }

.role-grid {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: clamp(52px, 8vw, 108px);
  align-items: start;
}

.role-copy > p:first-of-type { font-size: 1.2rem; }

.boundary {
  padding: 30px;
  border: 1px solid var(--ink);
  background: var(--surface);
}

.boundary h3 {
  font-family: "DM Sans", Arial, sans-serif;
  font-size: 1.28rem;
  letter-spacing: -0.02em;
}

.boundary dl { margin: 26px 0 0; }

.boundary div {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.boundary dt { color: var(--ink-soft); }
.boundary dd { margin: 0; font-weight: 700; }

.story { border-top: 1px solid var(--line); }

.chapter {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: 42px;
  padding: clamp(72px, 8vw, 112px) 0;
  border-bottom: 1px solid var(--line);
}

.chapter-number {
  color: var(--accent-deep);
  font-family: "DM Mono", monospace;
  font-size: 0.93rem;
}

.chapter-body { max-width: 800px; }
.chapter-body > p { font-size: 1.08rem; }

.claim-note {
  margin: 30px 0 0;
  padding: 22px 24px;
  border-left: 6px solid var(--accent);
  background: var(--surface);
}

.claim-note strong { color: var(--accent-deep); }

figure { margin: 0; }

.figure-wrap {
  padding: 0 0 clamp(74px, 9vw, 122px);
}

.diagram-scroll {
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--ink);
  border-radius: 18px;
  background: white;
  scrollbar-color: var(--accent) var(--paper);
}

.diagram-scroll img {
  width: auto;
  max-width: none;
  margin-inline: auto;
}

.mobile-pan-hint {
  position: sticky;
  z-index: 2;
  left: 0;
  display: block;
  width: max-content;
  padding: 8px 10px;
  background: var(--signal);
  color: var(--ink);
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
}

figcaption {
  display: grid;
  grid-template-columns: 190px minmax(0, 760px);
  gap: 26px;
  padding-top: 18px;
  color: var(--ink-soft);
  font-size: .96rem;
}

figcaption strong { color: var(--ink); }

.work-band {
  background: var(--accent-soft);
}

.sequence {
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--ink);
  counter-reset: step;
  list-style: none;
}

.sequence li {
  display: grid;
  grid-template-columns: 72px .8fr 1.2fr;
  gap: 30px;
  padding: 28px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 34%, transparent);
  counter-increment: step;
}

.sequence li::before {
  content: "0" counter(step);
  color: var(--accent-deep);
  font-family: "DM Mono", monospace;
}

.sequence strong { font-size: 1.16rem; }
.sequence p { margin: 0; color: color-mix(in srgb, var(--ink) 76%, transparent); }

.outcomes {
  background: var(--ink);
  color: var(--surface);
}

.outcomes .section-head .eyebrow { color: var(--signal); }
.outcomes .section-head p { color: var(--dark-soft); }

.outcome-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid #52645f;
}

.outcome {
  min-height: 250px;
  padding: 28px 24px 34px 0;
}

.outcome + .outcome {
  padding-left: 24px;
  border-left: 1px solid #52645f;
}

.outcome .eyebrow { color: var(--accent-soft); }
.outcome strong { display: block; margin: 18px 0 12px; font-size: 1.18rem; }
.outcome p { color: var(--dark-soft); }

.evidence-note {
  max-width: 820px;
  margin-top: 42px;
  padding-left: 22px;
  border-left: 5px solid var(--accent);
  color: var(--dark-soft);
}

.evidence-note strong { color: var(--surface); }

.reflection {
  background: var(--accent-deep);
  color: var(--surface);
}

.reflection-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(54px, 8vw, 112px);
  align-items: end;
}

.reflection h2 { margin-bottom: 0; }
.reflection p { font-size: 1.18rem; }

.sources {
  padding: 54px 0;
  border-bottom: 1px solid var(--line);
}

.sources details { max-width: 900px; }
.sources summary { min-height: 44px; cursor: pointer; font-weight: 700; }
.sources ul { padding-left: 21px; color: var(--ink-soft); }
.sources li { margin: 11px 0; }
.sources p { color: var(--ink-soft); }

.next-case {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 34px;
  align-items: center;
  padding: 70px 0;
}

.next-case h2 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(2.35rem, 4.8vw, 4.65rem);
}

.next-case a {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  padding: 12px 20px;
  background: var(--dark);
  color: white;
  font-weight: 700;
  text-decoration: none;
}

.case-footer {
  padding: 32px 0 46px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: .9rem;
}

@media (max-width: 900px) {
  .hero,
  .precis,
  .role-grid,
  .reflection-grid { grid-template-columns: 1fr; }

  .hero-mark { max-width: 520px; }
  .facts,
  .stakes-grid { grid-template-columns: 1fr 1fr; }
  .facts div:nth-child(odd),
  .stake:nth-child(3) { border-left: 0; }
  .facts div:nth-child(odd) { padding-left: 0; }
  .facts div:nth-child(even) {
    padding-left: 24px;
    border-left: 1px solid var(--line);
  }
  .facts div:nth-child(n+3),
  .stake:nth-child(n+3) { border-top: 1px solid var(--line); }
  .outcome-grid { grid-template-columns: 1fr; }
  .outcome,
  .outcome + .outcome { min-height: 0; padding: 28px 0; border-left: 0; border-bottom: 1px solid #52645f; }
}

@media (max-width: 720px) {
  .shell,
  .reading { width: min(100% - 32px, var(--wide)); }

  .case-nav { align-items: flex-start; padding: 17px 0; }
  h1 { font-size: clamp(3.1rem, 14vw, 5rem); }
  .section-head,
  .chapter { grid-template-columns: 1fr; gap: 18px; }
  .section-head .eyebrow { padding-top: 0; }
  .sequence li { grid-template-columns: 54px 1fr; gap: 17px; }
  .sequence li p { grid-column: 2; }
  .boundary div { grid-template-columns: 1fr; gap: 4px; }
  figcaption { grid-template-columns: 1fr; gap: 6px; }
  .next-case { grid-template-columns: 1fr; align-items: start; }

}

@media (max-width: 500px) {
  .case-nav { flex-direction: column; gap: 4px; }
  .facts,
  .stakes-grid { grid-template-columns: 1fr; }
  .facts div,
  .facts div + div,
  .stake,
  .stake + .stake { min-height: 0; padding: 20px 0; border-left: 0; border-top: 1px solid var(--line); }
  .facts div:first-child,
  .stake:first-child { border-top: 0; }
  .facts div:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }
  .stake + .stake { border-color: color-mix(in srgb, var(--dark-soft) 45%, transparent); }
}

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