/* Fourth State refinement, authorized by ADR-020. */
.fourth-state-page {
  --interior-hero-title-top: calc(37.505svh - 9.895vw + 114.85px);
  background: var(--surface-page);
}
.fourth-state-page main { overflow: clip; }
.fourth-state-page section { position: relative; }
.fourth-state-page .masthead[data-surface="light"] .site-nav a[aria-current="page"] { color: var(--color-accent-accessible); }
.fourth-state-page .masthead[data-surface="dark"] .site-nav a[aria-current="page"] { color: var(--color-teal); }
.fs-dark { background: var(--surface-dark); color: var(--color-warm-white); }
.fs-dark :is(.display, h2, h3) { color: var(--color-warm-white); }
.fs-dark .annotation { color: var(--color-teal); }
.fs-dark .prose { color: var(--color-text-secondary-on-dark); }
.fs-light { background: var(--surface-page); }

.fs-page-hero {
  margin-top: calc(-1 * var(--nav-h));
  min-height: clamp(700px, 92svh, 900px);
  isolation: isolate;
  display: grid;
  align-items: start;
}
.fs-page-hero__media,
.fs-page-hero__scrim { position: absolute; inset: 0; }
.fs-page-hero__media { z-index: -2; overflow: hidden; }
.fs-page-hero__media img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.fs-page-hero__scrim {
  z-index: -1;
  background: linear-gradient(90deg, var(--navy-99) 0%, var(--navy-96) 24%, var(--navy-78) 43%, var(--navy-18) 67%, var(--navy-00) 100%);
}
.fs-page-hero__content {
  padding-block: calc(var(--nav-h) + 54px) 68px;
  padding-top: var(--interior-hero-title-top);
}
.fs-page-hero__content > .annotation { display: none; }
.fs-page-hero h1 {
  margin-top: 0;
  font-size: clamp(62px, 6.2vw, 104px);
  max-width: 880px;
}
.fs-page-hero__statement {
  margin-top: 30px;
  font: 500 clamp(30px, 3vw, 46px)/1.13 var(--font-display);
  letter-spacing: -.018em;
  max-width: 650px;
}

.fs-meaning { min-height: 590px; display: grid; align-items: center; isolation: isolate; }
.fs-meaning__media { position: absolute; inset: 0 auto 0 0; width: 64%; z-index: -1; overflow: hidden; }
.fs-meaning__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--pearl-16), var(--pearl-73) 65%, var(--surface-page)); }
.fs-meaning__media img { width: 100%; height: 100%; object-fit: cover; object-position: left center; opacity: .62; }
.fs-meaning__grid,
.fs-work__grid,
.fs-origin__grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(320px, .88fr); gap: clamp(56px, 7vw, 126px); align-items: center; padding-block: clamp(80px, 8vw, 122px); }
.fs-meaning h2 { font-size: clamp(43px, 4.15vw, 64px); max-width: 700px; }
.fs-meaning__copy { display: grid; gap: 24px; max-width: 540px; }
.fs-meaning__copy strong { color: var(--color-text-primary); font-weight: 500; }

.fs-states { padding-block: clamp(76px, 6.5vw, 104px); }
.fs-states__grid { display: grid; grid-template-columns: minmax(260px, .72fr) minmax(480px, 1.28fr); column-gap: clamp(56px, 7vw, 120px); align-items: start; }
.fs-states__intro { position: sticky; top: calc(var(--nav-h) + 44px); }
.fs-states h2 { font-size: clamp(44px, 4.35vw, 66px); }
.fs-states__intro .prose { margin-top: 24px; max-width: 410px; }
.fs-states__list { list-style: none; padding: 0; margin: 0; }
.fs-state {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 22px;
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--color-rule-on-dark);
}
.fs-state:first-child { padding-top: 0; }
.fs-state h3 { font: 500 clamp(29px, 2.55vw, 40px)/1.08 var(--font-display); letter-spacing: -.018em; }
.fs-state p { margin-top: 8px; max-width: 560px; color: var(--color-text-secondary-on-dark); font-size: clamp(15px, 1.2vw, 18px); line-height: 1.45; }
.fs-state--beyond .annotation,
.fs-state--beyond h3 { color: var(--color-teal); }
.fs-states__qualification {
  grid-column: 2;
  margin-top: 30px;
  max-width: 620px;
  color: var(--color-warm-white);
  font: 500 clamp(20px, 1.75vw, 27px)/1.42 var(--font-display);
}

.fs-work { background: var(--surface-elevated); }
.fs-work h2,
.fs-origin__grid h2 { font-size: clamp(42px, 4.1vw, 62px); }
.fs-work__grid > .prose { align-self: end; max-width: 510px; }

.fs-principles { padding-block: clamp(82px, 7vw, 112px); }
.fs-principles__list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(54px, 5vw, 78px) clamp(72px, 8vw, 140px); }
.fs-principles article { max-width: 640px; }
.fs-principles h3 { font: 500 clamp(34px, 3.3vw, 50px)/1.1 var(--font-display); letter-spacing: -.02em; }
.fs-principles article p { margin-top: 16px; max-width: 520px; color: var(--color-text-secondary-on-dark); font-size: var(--t-body-sm); }

.fs-expression { padding-bottom: clamp(92px, 9vw, 142px); }
.fs-origin__copy { display: grid; gap: 24px; max-width: 540px; }
.fs-origin__copy .prose:first-child { color: var(--color-text-primary); }
.fs-product__heading { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(250px, .48fr); gap: clamp(50px, 7vw, 120px); align-items: end; padding-top: clamp(36px, 4vw, 60px); border-top: 1px solid var(--color-divider); }
.fs-product__heading h2 { font-size: clamp(45px, 4.4vw, 66px); }
.fs-product__heading .prose { margin-top: 24px; max-width: 680px; }
.fs-product__route { justify-self: end; padding-bottom: 6px; }
.fs-product__route .annotation { color: var(--color-accent-accessible); }
.fs-product__route .route { margin-top: 20px; }
.fs-showcase { position: relative; margin-top: clamp(54px, 6vw, 88px); min-height: clamp(480px, 49vw, 735px); }
.fs-showcase figure { overflow: hidden; background: var(--surface-elevated); box-shadow: 0 28px 70px var(--navy-09); }
.fs-showcase img { display: block; width: 100%; height: auto; }
.fs-showcase__environment { width: 76%; border-radius: 18px; }
.fs-showcase__ui { position: absolute; width: 52%; right: 0; bottom: 0; border-radius: 14px; border: 7px solid var(--surface-elevated); }

.fs-close .close__statement { max-width: 780px; }

@media (max-width: 899px) {
  .fourth-state-page {
    --interior-hero-title-top: clamp(295px, calc(59.47svh - 188.2px), 421px);
  }
  .fs-page-hero { min-height: 820px; align-items: start; }
  .fs-page-hero__media { top: 410px; height: 410px; }
  .fs-page-hero__media img { object-position: center 64%; }
  .fs-page-hero__scrim { background: linear-gradient(180deg, var(--surface-dark) 0 49%, var(--navy-84) 65%, var(--navy-18) 100%); }
  .fs-page-hero__content { padding-top: var(--interior-hero-title-top); }
  .fs-page-hero h1 { margin-top: 0; font-size: clamp(48px, 13.3vw, 56px); max-width: 330px; }
  .fs-page-hero__statement { margin-top: 22px; font-size: 29px; max-width: 330px; }
  .fs-page-hero__statement br { display: none; }

  .fs-meaning { min-height: 700px; align-items: start; }
  .fs-meaning__media { inset: auto 0 0; width: 100%; height: 230px; }
  .fs-meaning__media::after { background: linear-gradient(180deg, var(--surface-page), var(--pearl-16) 48%, var(--pearl-00)); }
  .fs-meaning__media img { object-position: center 72%; opacity: .88; }
  .fs-meaning__grid,
  .fs-work__grid,
  .fs-origin__grid { display: block; padding-block: 66px; }
  .fs-meaning h2,
  .fs-work h2,
  .fs-origin__grid h2 { font-size: clamp(35px, 9.8vw, 42px); }
  .fs-meaning__copy { margin-top: 30px; gap: 20px; max-width: 35ch; }

  .fs-states { padding-block: 66px; }
  .fs-states__grid { display: block; }
  .fs-states__intro { position: static; }
  .fs-states h2 { font-size: 39px; }
  .fs-states__intro .prose { margin-top: 18px; }
  .fs-states__list { margin-top: 42px; }
  .fs-state { grid-template-columns: 34px 1fr; gap: 14px; padding: 17px 0 19px; }
  .fs-state h3 { font-size: 30px; }
  .fs-state p { margin-top: 6px; font-size: 15px; }
  .fs-states__qualification { margin-top: 28px; font-size: 21px; }

  .fs-work__grid > .prose { margin-top: 30px; }
  .fs-work h2 br { display: none; }

  .fs-principles { padding-block: 70px; }
  .fs-principles__list { grid-template-columns: 1fr; gap: 48px; }
  .fs-principles h3 { font-size: 34px; }

  .fs-expression { padding-bottom: 76px; }
  .fs-origin__copy { margin-top: 32px; gap: 20px; }
  .fs-product__heading { display: block; padding-top: 54px; }
  .fs-product__heading h2 { font-size: 40px; }
  .fs-product__route { margin-top: 32px; }
  .fs-showcase { margin-top: 48px; min-height: 0; display: grid; gap: 22px; }
  .fs-showcase__environment { width: 100%; border-radius: 12px; }
  .fs-showcase__ui { position: static; width: 92%; justify-self: end; border-width: 5px; border-radius: 10px; }

  .fs-close .close__statement { font-size: 40px; }
}

@media (min-width: 1800px) {
  .fs-page-hero__media img { object-position: center 48%; }
}

@media (prefers-reduced-motion: reduce) {
  .fourth-state-page *, .fourth-state-page *::before, .fourth-state-page *::after { scroll-behavior: auto !important; transition: none !important; }
}

@media print {
  .fourth-state-page .masthead { display: none; }
  .fs-page-hero { min-height: auto; }
  .fs-page-hero__media, .fs-page-hero__scrim, .fs-meaning__media { display: none; }
}