:root {
  color-scheme: light;
  --ink: #11110f;
  --muted: #5d5b54;
  --paper: #f4f1e9;
  --surface: #fffdf7;
  --line: #c8c2b4;
  --acid: #c8ff31;
  --orange: #ff6a3d;
  --blue: #2356e8;
  --green: #176b48;
  --red: #a92a2a;
  --shadow: 6px 6px 0 #11110f;
  --radius: 2px;
  --shell: min(1180px, calc(100vw - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.68;
}
a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--orange); }
img, svg { max-width: 100%; }
button, select { font: inherit; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 20; transform: translateY(-150%); padding: 10px 16px; background: var(--acid); border: 2px solid var(--ink); font-weight: 800; }
.skip-link:focus { transform: none; }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 2px solid var(--ink); background: rgba(244, 241, 233, .96); backdrop-filter: blur(12px); }
.header-row { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.publisher { margin: 0; font-size: .72rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { font-size: .79rem; font-weight: 800; text-decoration: none; text-transform: uppercase; letter-spacing: .04em; }
nav a:hover, nav a:focus-visible { text-decoration: underline; text-decoration-color: var(--orange); }

.hero { padding: 80px 0 70px; border-bottom: 2px solid var(--ink); background: linear-gradient(135deg, var(--paper) 0 62%, var(--acid) 62% 100%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(300px, .75fr); gap: 54px; align-items: end; }
.eyebrow, .section-kicker { margin: 0 0 12px; font-size: .76rem; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
h1, h2, h3, h4 { font-family: Georgia, "Times New Roman", serif; line-height: 1.08; text-wrap: balance; }
h1 { max-width: 900px; margin: 0; font-size: clamp(3.2rem, 8vw, 7.5rem); letter-spacing: -.065em; }
h2 { margin: 0 0 22px; font-size: clamp(2rem, 4.4vw, 4.1rem); letter-spacing: -.045em; }
h3 { margin: 0 0 12px; font-size: clamp(1.32rem, 2.4vw, 2rem); letter-spacing: -.025em; }
h4 { margin: 26px 0 6px; font-size: 1.03rem; }
.dek { max-width: 820px; margin: 24px 0 0; font-size: clamp(1.2rem, 2vw, 1.55rem); line-height: 1.45; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 16px; border: 2px solid var(--ink); border-radius: var(--radius); font-weight: 850; text-decoration: none; cursor: pointer; }
.button.primary { color: var(--surface); background: var(--ink); }
.button.secondary { background: var(--surface); }
.button:hover, .button:focus-visible { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--ink); }
.evidence-card { padding: 24px; border: 2px solid var(--ink); background: var(--surface); box-shadow: var(--shadow); }
.evidence-card h2 { font-family: inherit; font-size: .9rem; letter-spacing: .12em; text-transform: uppercase; }
.evidence-card dl { margin: 0; }
.evidence-card dl div { display: flex; justify-content: space-between; gap: 20px; padding: 10px 0; border-top: 1px solid var(--line); }
.evidence-card dt { color: var(--muted); }
.evidence-card dd { margin: 0; text-align: right; font-weight: 800; }

section, figure { scroll-margin-top: 88px; }
.answer-block, .concept-grid, .matrix-section, .standards-section, .decision-section, .rollout-section, .limitations-section { padding-block: 84px; }
.answer-block { max-width: 980px; }
.answer-block > p:not(.section-kicker) { font-size: 1.14rem; }
.answer-block a[href^="https://pharosproduction.com"] { font-weight: 850; text-decoration-color: var(--orange); }
.callout { margin: 30px 0 0; padding: 20px 24px; border-left: 7px solid var(--blue); background: #e9edff; }
.callout.warning { border-color: var(--orange); background: #fff0e5; }

.concept-grid { display: grid; grid-template-columns: .8fr 1.4fr; gap: 72px; border-top: 1px solid var(--line); }
.definition-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 0; }
.definition-list > div { padding: 20px; border: 1px solid var(--line); background: var(--surface); }
.definition-list dt { margin-bottom: 5px; font-weight: 900; }
.definition-list dd { margin: 0; color: var(--muted); }

.system-map { padding: 48px 0 78px; }
.system-map figcaption { max-width: 850px; }
.flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; gap: 12px; align-items: center; margin-top: 30px; }
.flow div { min-height: 170px; display: flex; flex-direction: column; padding: 20px; border: 2px solid var(--ink); background: var(--surface); }
.flow span { width: 34px; height: 34px; display: grid; place-items: center; margin-bottom: auto; border-radius: 50%; background: var(--ink); color: var(--surface); font-weight: 900; }
.flow strong { margin-top: 25px; font-family: Georgia, "Times New Roman", serif; font-size: 1.38rem; }
.flow small { color: var(--muted); line-height: 1.35; }
.flow b { font-size: 1.5rem; }

.navigator-section { padding: 74px 0; border-block: 2px solid var(--ink); background: var(--acid); }
.navigator-section h2 { max-width: 900px; }
fieldset { display: grid; grid-template-columns: auto minmax(280px, 1fr) auto; gap: 14px; align-items: center; margin: 30px 0 0; padding: 22px; border: 2px solid var(--ink); background: var(--surface); }
legend { padding: 0 8px; font-weight: 900; }
label { font-weight: 800; }
select { width: 100%; min-height: 48px; padding: 8px 12px; border: 2px solid var(--ink); background: white; }
output { grid-column: 1 / -1; min-height: 28px; color: var(--muted); font-weight: 750; }

.matrix-section > p:not(.section-kicker) { max-width: 850px; }
.legend { display: flex; gap: 10px; flex-wrap: wrap; margin: 22px 0; }
.status { display: inline-block; padding: 3px 8px; border: 1px solid currentColor; border-radius: 99px; font-size: .7rem; font-weight: 900; letter-spacing: .035em; text-transform: uppercase; white-space: nowrap; }
.status.documented { color: var(--green); background: #e5f6eb; }
.status.partial { color: #7d4900; background: #fff0c4; }
.status.not-public { color: var(--red); background: #ffe4e4; }
.table-scroll { overflow-x: auto; border: 2px solid var(--ink); background: var(--surface); }
table { width: 100%; min-width: 1080px; border-collapse: collapse; }
caption { padding: 14px; text-align: left; color: var(--muted); font-size: .82rem; }
th, td { padding: 15px; border: 1px solid var(--line); vertical-align: top; text-align: left; }
thead th { color: var(--surface); background: var(--ink); font-size: .76rem; text-transform: uppercase; letter-spacing: .06em; }
tbody th { min-width: 170px; background: #ebe7dd; }
td small { display: block; min-width: 120px; margin-top: 7px; color: var(--muted); line-height: 1.35; }

.profiles-section { padding: 84px 0; border-block: 2px solid var(--ink); background: #ddd7ca; }
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.tool-card { padding: 28px; border: 2px solid var(--ink); background: var(--surface); box-shadow: 5px 5px 0 var(--ink); }
.tool-card[hidden] { display: none; }
.tool-card:nth-child(3) { grid-column: 1 / -1; }
.tool-card header { padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.tool-card p { margin: 7px 0; }
.tool-type { color: var(--blue); font-size: .75rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.source-link { display: inline-block; margin-top: 20px; font-weight: 800; }

.two-column { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.two-column > div { padding: 26px; border-top: 5px solid var(--ink); background: var(--surface); }
.standards-section > p:last-child { max-width: 950px; margin: 34px auto 0; padding: 28px; border: 2px solid var(--ink); background: var(--acid); font-size: 1.1rem; }
.standards-section a[href^="https://pharosproduction.com"] { font-weight: 850; text-decoration-color: var(--orange); }

.acceptance-section { padding: 84px 0; border-block: 2px solid var(--ink); color: var(--surface); background: var(--ink); }
.test-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; padding: 0; list-style-position: inside; background: #55534d; border: 1px solid #55534d; counter-reset: item; }
.test-list li { padding: 24px; background: #1d1d1a; }
.test-list li::marker { color: var(--acid); font-weight: 900; }

.decision-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.decision-grid > div { padding: 24px; border: 2px solid var(--ink); background: var(--surface); }
.buyer-section { padding: 84px 0; background: var(--blue); color: white; }
.question-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
details { border: 1px solid currentColor; background: var(--surface); color: var(--ink); }
summary { padding: 18px 20px; cursor: pointer; font-weight: 850; }
details p { padding: 0 20px 20px; margin: 0; }

.timeline { margin: 0; padding: 0; list-style: none; }
.timeline li { display: grid; grid-template-columns: 150px 1fr; gap: 30px; padding: 24px 0; border-top: 1px solid var(--line); }
.timeline li > span { color: var(--blue); font-weight: 900; text-transform: uppercase; letter-spacing: .07em; }
.timeline h3, .timeline p { margin-top: 0; }

.limitations-section { border-top: 1px solid var(--line); }
.faq-section { padding: 84px 0; border-top: 2px solid var(--ink); background: #eee9df; }
.faq-section details { max-width: 940px; margin: 10px 0; }
.faq-section summary { font-family: Georgia, "Times New Roman", serif; font-size: 1.18rem; }

.site-footer { padding: 54px 0; border-top: 2px solid var(--ink); color: var(--surface); background: var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; }
.site-footer h2 { margin: 0 0 12px; font-family: inherit; font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; }
.site-footer a { display: block; margin: 5px 0; }
.site-footer p { margin: 4px 0; color: #d5d0c4; }

.subpage { padding: 70px 0 100px; }
.prose { max-width: 900px; }
.prose header { padding-bottom: 40px; border-bottom: 2px solid var(--ink); }
.prose h1 { font-size: clamp(3rem, 7vw, 6rem); }
.prose section { padding: 38px 0; border-bottom: 1px solid var(--line); }
.prose h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
.prose li { margin-bottom: 8px; }
.source-register { padding-left: 0; list-style: none; }
.source-register li { display: grid; grid-template-columns: 1fr auto; gap: 8px 24px; padding: 22px 0; border-top: 1px solid var(--line); }
.source-register p { grid-column: 1 / -1; margin: 0; color: var(--muted); }

:focus-visible { outline: 4px solid var(--orange); outline-offset: 3px; }
@media (max-width: 920px) {
  :root { --shell: min(100% - 28px, 760px); }
  .site-header { position: relative; }
  .header-row { align-items: flex-start; flex-direction: column; padding-block: 16px; }
  .hero { background: linear-gradient(155deg, var(--paper) 0 78%, var(--acid) 78% 100%); }
  .hero-grid, .concept-grid, .two-column, .footer-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow b { transform: rotate(90deg); text-align: center; }
  fieldset { grid-template-columns: 1fr; }
  output { grid-column: auto; }
}
@media (max-width: 680px) {
  body { font-size: 16px; }
  h1 { font-size: clamp(3rem, 17vw, 5.2rem); }
  .hero { padding-top: 50px; }
  .definition-list, .tool-grid, .test-list, .decision-grid, .question-grid { grid-template-columns: 1fr; }
  .tool-card:nth-child(3) { grid-column: auto; }
  .timeline li { grid-template-columns: 1fr; gap: 6px; }
  .source-register li { grid-template-columns: 1fr; }
  .source-register p { grid-column: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}