@import url('https://fonts.googleapis.com/css2?family=Onest:wght@400;500;600;700;800&display=swap');

:root {
  --ink: oklch(28% 0.047 241);
  --ink-soft: oklch(40% 0.039 238);
  --ink-muted: oklch(54% 0.029 235);
  --rail: oklch(98% 0.008 232);
  --rail-text: oklch(28% 0.047 241);
  --mineral: oklch(92% 0.031 229);
  --mist: oklch(98% 0.009 231);
  --surface: oklch(95% 0.021 229);
  --accent: oklch(55% 0.118 238);
  --focus: oklch(47% 0.132 240);
  --rule: oklch(80% 0.025 231);
  --font: "Onest", "Segoe UI", Arial, sans-serif;
  --rail-width: clamp(13.5rem, 18vw, 17.75rem);
  --content-max: 86rem;
  --space-1: .5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6.75rem;
  --space-8: 9rem;
}

* { box-sizing: border-box; }

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

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--mineral);
  font-family: var(--font);
  font-size: 16px;
  font-kerning: normal;
  font-optical-sizing: auto;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

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

.skip-link {
  position: fixed;
  z-index: 30;
  top: 1rem;
  left: 1rem;
  padding: .75rem 1rem;
  color: white;
  background: var(--accent);
  transform: translateY(-180%);
  transition: transform .15s ease-out;
}
.skip-link:focus { transform: translateY(0); }

.site-frame { min-height: 100vh; }

.site-rail {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  align-items: center;
  min-height: 5.5rem;
  padding: 1.1rem clamp(1.5rem, 5vw, 6rem);
  color: var(--rail-text);
  background: var(--rail);
  box-shadow: 0 10px 28px oklch(40% 0.04 235 / .09);
}

.brand { display: inline-flex; align-items: baseline; gap: .8rem; color: inherit; text-decoration: none; }
.brand__monogram { color: var(--accent); font-size: .7rem; font-weight: 800; letter-spacing: .14em; }
.brand__name { font-size: .95rem; font-weight: 700; letter-spacing: -.025em; line-height: 1.15; }

.site-nav { display: flex; flex-wrap: wrap; gap: .35rem; margin-left: auto; }
.site-nav a { display: inline-flex; min-height: 38px; align-items: center; padding: .45rem .7rem; border-radius: .3rem; color: var(--ink-muted); font-size: .72rem; font-weight: 700; letter-spacing: .065em; text-decoration: none; text-transform: uppercase; transition: background .16s ease-out, box-shadow .16s ease-out, color .16s ease-out, transform .16s ease-out; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--ink); background: var(--surface); box-shadow: 0 5px 14px oklch(42% 0.045 236 / .12); transform: translateY(-1px); }
.site-nav a[aria-current="page"] { color: white; background: var(--accent); box-shadow: 0 5px 14px oklch(42% 0.085 238 / .22); }
.site-nav a:active { transform: translateY(1px); box-shadow: none; }

.rail-note, .rail-footer { display: none; }

.site-main { min-width: 0; background: var(--mist); }
.mobile-header { display: none; }
.mobile-nav { display: none; }
.content-width { width: min(calc(100% - clamp(2rem, 7vw, 8rem)), var(--content-max)); margin-inline: auto; }

.eyebrow { margin: 0 0 var(--space-3); color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .11em; line-height: 1.4; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
h1, h2 { letter-spacing: -.045em; }
h1 { max-width: 13ch; margin-bottom: var(--space-4); font-size: clamp(3.1rem, 5.7vw, 6.3rem); font-weight: 800; line-height: .98; }
h2 { margin-bottom: var(--space-3); font-size: clamp(2rem, 3.2vw, 3.5rem); font-weight: 750; line-height: 1.08; }
h3 { margin-bottom: .7rem; font-size: clamp(1.15rem, 1.6vw, 1.42rem); font-weight: 750; letter-spacing: -.02em; line-height: 1.25; }
p { text-wrap: pretty; }

.text-link { display: inline-flex; min-height: 44px; align-items: center; color: var(--ink); font-size: .78rem; font-weight: 800; letter-spacing: .075em; text-decoration: none; text-transform: uppercase; }
.text-link:hover { color: var(--accent); }

.home-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(20rem, .9fr); gap: clamp(2.5rem, 6vw, 7rem); align-items: center; min-height: min(48rem, calc(100vh - 5.5rem)); padding: clamp(4rem, 8vw, 7rem) 0; }
.home-hero__copy { max-width: 45rem; }
.home-hero__lead { max-width: 61ch; margin-bottom: var(--space-4); color: var(--ink-soft); font-size: clamp(1rem, 1.35vw, 1.18rem); }
.portrait { margin: 0; }
.portrait img { width: 100%; min-height: 33rem; object-fit: cover; object-position: center; }
.portrait figcaption { margin-top: .9rem; color: var(--ink-muted); font-size: .69rem; line-height: 1.45; }

.intro-band { padding: var(--space-7) 0; background: var(--surface); }
.intro-band__grid { display: grid; grid-template-columns: minmax(12rem, .5fr) minmax(0, 1fr); gap: clamp(2rem, 9vw, 10rem); }
.intro-band__label { color: var(--ink-muted); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.intro-band__statement { max-width: 49rem; margin: 0; color: var(--ink); font-size: clamp(1.5rem, 2.35vw, 2.5rem); font-weight: 600; letter-spacing: -.035em; line-height: 1.25; }

.photo-band { padding: var(--space-6) 0 0; }
.photo-band figure { margin: 0; }
.photo-band img { width: 100%; max-height: 42rem; object-fit: cover; }

.home-overview { display: grid; grid-template-columns: minmax(13rem, .4fr) minmax(0, 1fr); gap: clamp(2rem, 9vw, 10rem); padding: var(--space-8) 0; }
.home-overview__content { max-width: 56rem; }
.home-overview__content > p { max-width: 69ch; color: var(--ink-soft); }
.plain-list { display: grid; margin: var(--space-5) 0 0; padding: 0; list-style: none; }
.plain-list li { display: grid; grid-template-columns: 8.5rem minmax(0, 1fr); gap: var(--space-2); padding: 1.3rem 0; color: var(--ink-soft); }
.plain-list strong { color: var(--ink); font-size: .78rem; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }

.page-map { padding: var(--space-7) 0 var(--space-8); background: oklch(61% 0.102 235); color: white; }
.page-map__title { margin: 0 0 var(--space-5); color: oklch(92% 0.028 230); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.page-map__links { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-4); }
.page-map a { display: block; color: inherit; text-decoration: none; }
.page-map a:hover h3 { color: oklch(94% 0.026 230); }
.page-map h3 { margin-bottom: .6rem; color: white; font-size: 1.3rem; transition: color .15s ease-out; }
.page-map p { margin: 0; color: oklch(91% 0.02 230); font-size: .86rem; line-height: 1.6; }

.site-footer { display: flex; justify-content: space-between; gap: var(--space-3); padding: var(--space-4) 0; color: var(--ink-muted); font-size: .68rem; }
.site-footer p { margin: 0; }

.document-hero { display: grid; grid-template-columns: minmax(19rem, .82fr) minmax(0, 1fr); min-height: 43rem; background: var(--surface); }
.document-hero__image { min-height: 100%; margin: 0; }
.document-hero__image img { width: 100%; height: 100%; min-height: 43rem; object-fit: cover; }
.document-hero__copy { display: flex; flex-direction: column; justify-content: flex-end; max-width: 47rem; padding: clamp(3rem, 8vw, 8rem); }
.document-hero__copy p:last-child { max-width: 55ch; margin-bottom: 0; color: var(--ink-soft); font-size: 1.08rem; }

.content-section { padding: var(--space-8) 0; }
.content-section--surface { background: var(--surface); }
.section-grid { display: grid; grid-template-columns: minmax(11rem, .38fr) minmax(0, 1fr); gap: clamp(2rem, 9vw, 10rem); }
.section-meta { color: var(--ink-muted); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.section-copy { max-width: 61rem; }
.section-copy > p { max-width: 68ch; color: var(--ink-soft); }
.section-copy > p:first-of-type { color: var(--ink); font-size: clamp(1.22rem, 1.75vw, 1.55rem); font-weight: 550; line-height: 1.5; }

.principle-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(2rem, 5vw, 6rem); }
.principle-grid article { max-width: 22rem; }
.principle-grid__number { margin-bottom: 1rem; color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .1em; }
.principle-grid p:last-child { margin: 0; color: var(--ink-soft); font-size: .94rem; }

.quote-block { max-width: 68rem; margin: 0 auto; padding: var(--space-8) 0; }
.quote-block p { margin: 0; color: var(--ink); font-size: clamp(1.65rem, 3.2vw, 3.3rem); font-weight: 650; letter-spacing: -.04em; line-height: 1.2; }

.topic-list { display: grid; gap: var(--space-6); }
.topic { display: grid; grid-template-columns: minmax(3rem, .16fr) minmax(13rem, .55fr) minmax(0, 1fr); gap: var(--space-3); align-items: start; }
.topic__index { padding-top: .32rem; color: var(--accent); font-size: .73rem; font-weight: 800; letter-spacing: .1em; }
.topic h2 { margin: 0; font-size: clamp(1.45rem, 2.25vw, 2.25rem); }
.topic p { max-width: 48ch; margin: .3rem 0 0; color: var(--ink-soft); }

.statement-panel { padding: var(--space-8) 0; background: var(--mineral); color: var(--ink); }
.statement-panel__inner { display: grid; grid-template-columns: minmax(11rem, .4fr) minmax(0, 1fr); gap: clamp(2rem, 9vw, 10rem); }
.statement-panel .section-meta { color: var(--accent); }
.statement-panel h2 { max-width: 26ch; margin: 0; color: var(--ink); }

.timeline { display: grid; gap: var(--space-6); }
.timeline__item { display: grid; grid-template-columns: minmax(7rem, .25fr) minmax(13rem, .55fr) minmax(0, 1fr); gap: var(--space-3); align-items: start; }
.timeline__date { padding-top: .35rem; color: var(--accent); font-size: .75rem; font-weight: 800; letter-spacing: .08em; }
.timeline__item h2 { margin: 0; font-size: clamp(1.25rem, 2vw, 1.8rem); }
.timeline__item p { max-width: 51ch; margin: .25rem 0 0; color: var(--ink-soft); }

.image-section { padding: var(--space-6) 0 0; }
.image-section figure { margin: 0; }
.image-section img { width: 100%; max-height: 41rem; object-fit: cover; }

.method-list { display: grid; gap: var(--space-6); }
.method-step { display: grid; grid-template-columns: minmax(4rem, .15fr) minmax(14rem, .48fr) minmax(0, 1fr); gap: var(--space-3); }
.method-step__number { color: var(--accent); font-size: .76rem; font-weight: 800; letter-spacing: .1em; }
.method-step h2 { margin: 0; font-size: clamp(1.35rem, 2.15vw, 2rem); }
.method-step p { max-width: 52ch; margin: .25rem 0 0; color: var(--ink-soft); }

.related-pages { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-4); padding: var(--space-6) 0; }
.related-pages a { display: block; color: var(--ink); text-decoration: none; }
.related-pages a:hover h3 { color: var(--accent); }
.related-pages p { margin: 0; color: var(--ink-muted); font-size: .88rem; }

@media (max-width: 940px) {
  .site-frame { display: block; }
  .site-rail { display: none; }
  .site-main { min-height: 100vh; }
  .mobile-header { position: sticky; z-index: 10; top: 0; display: flex; align-items: center; justify-content: space-between; min-height: 4.5rem; padding: .75rem max(1rem, env(safe-area-inset-right)) .75rem max(1rem, env(safe-area-inset-left)); color: var(--rail-text); background: var(--rail); box-shadow: 0 8px 24px oklch(40% 0.04 235 / .09); }
  .mobile-header__brand { color: inherit; font-size: .9rem; font-weight: 750; letter-spacing: -.02em; text-decoration: none; }
  .menu-button { display: grid; width: 44px; height: 44px; padding: 0; place-items: center; border: 0; color: inherit; background: transparent; cursor: pointer; }
  .menu-button span:not(.sr-only) { display: block; width: 21px; height: 1px; margin: 4px 0; background: currentColor; }
  .mobile-nav { display: none; padding: 1rem max(1rem, env(safe-area-inset-right)) 1.25rem max(1rem, env(safe-area-inset-left)); background: var(--rail); box-shadow: 0 16px 24px oklch(40% 0.04 235 / .08); }
  .mobile-nav.is-open { display: grid; }
  .mobile-nav a { min-height: 44px; padding: .65rem 0; color: var(--ink-muted); font-size: .82rem; font-weight: 700; letter-spacing: .06em; text-decoration: none; text-transform: uppercase; }
  .mobile-nav a[aria-current="page"] { color: var(--accent); }
  .content-width { width: min(calc(100% - 3rem), 54rem); }
  .home-hero { grid-template-columns: 1fr; min-height: auto; padding-top: var(--space-7); }
  .home-hero__copy { padding-bottom: 0; }
  .portrait { max-width: 38rem; }
  .intro-band__grid, .home-overview, .section-grid, .statement-panel__inner { grid-template-columns: 1fr; gap: var(--space-3); }
  .document-hero { grid-template-columns: 1fr; min-height: 0; }
  .document-hero__image { order: 2; }
  .document-hero__image img { min-height: 22rem; max-height: 32rem; }
  .document-hero__copy { max-width: none; padding: var(--space-7) max(1.5rem, calc((100% - 54rem) / 2)); }
  .principle-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .topic, .timeline__item, .method-step { grid-template-columns: minmax(4rem, .16fr) minmax(0, .6fr) minmax(0, 1fr); }
}

@media (max-width: 640px) {
  .content-width { width: min(calc(100% - 2rem), 40rem); }
  h1 { max-width: none; font-size: clamp(2.55rem, 12vw, 4.25rem); }
  h2 { font-size: clamp(1.75rem, 8vw, 2.35rem); }
  .home-hero { gap: var(--space-5); padding-top: var(--space-6); padding-bottom: var(--space-6); }
  .portrait img { min-height: 26rem; }
  .intro-band, .content-section { padding: var(--space-6) 0; }
  .home-overview { padding: var(--space-7) 0; }
  .plain-list li { grid-template-columns: 1fr; gap: .45rem; }
  .page-map { padding: var(--space-6) 0; }
  .page-map__links, .principle-grid, .related-pages { grid-template-columns: 1fr; gap: var(--space-4); }
  .document-hero__copy { padding: var(--space-6) 1rem; }
  .document-hero__image img { min-height: 18rem; }
  .topic, .timeline__item, .method-step { grid-template-columns: 1fr; gap: .6rem; }
  .topic__index, .timeline__date { padding-top: 0; }
  .topic p, .timeline__item p, .method-step p { margin-top: 0; }
  .quote-block { padding: var(--space-7) 0; }
  .statement-panel { padding: var(--space-7) 0; }
  .site-footer { display: grid; gap: .7rem; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition-duration: .01ms !important; } }