body[data-page-kind='tesseract'] {
  --tesseract-gutter: clamp(1.25rem, 4vw, 5rem);
  --tesseract-shell: 82rem;
  --tesseract-reading: 49rem;
  --tesseract-chapter-space: clamp(4rem, 7vw, 7rem);
  --tesseract-card-shadow: 0 1.2rem 2.8rem rgba(13, 32, 48, 0.12);
  --tesseract-hover-shadow: 0 0.6rem 1.4rem rgba(17, 43, 57, 0.18);
  --tesseract-paper-outset: 16px;
  --text-accent-on-dark: var(--teal);
  background: var(--white);
  background-image: none;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  font-synthesis: none;
}

body[data-page-kind='tesseract']::before,
body[data-page-kind='tesseract']::after {
  content: none;
  display: none;
}

body[data-page-kind='tesseract'] main {
  overflow: visible;
}

body[data-page-kind='tesseract'] .site-header,
body[data-page-kind='tesseract'] .site-nav,
body[data-page-kind='tesseract'] .site-footer {
  background-color: var(--midnight);
  background-image: none;
  font-family: var(--font-ui);
}

body[data-page-kind='tesseract'] .site-footer__contact-label,
body[data-page-kind='tesseract'] .site-footer__links-label,
body[data-page-kind='tesseract'] .site-footer__contact address a {
  font-weight: 600;
}

body[data-page-kind='tesseract'] .site-footer__contact-label,
body[data-page-kind='tesseract'] .site-footer__links-label {
  letter-spacing: 0.04em;
}

body[data-page-kind='tesseract'] .menu-toggle {
  font-family: var(--font-ui);
  font-weight: 600;
}

body[data-page-kind='tesseract'] h1,
body[data-page-kind='tesseract'] h2,
body[data-page-kind='tesseract'] h3 {
  margin: 0;
  color: inherit;
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: 0;
}

body[data-page-kind='tesseract'] :where(.tesseract-page p:not(.tesseract-eyebrow):not(.tesseract-standfirst)) {
  margin: 0;
  max-width: 75ch;
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.125rem);
  line-height: 1.6;
}

body[data-page-kind='tesseract'] img {
  display: block;
  max-width: 100%;
  height: auto;
}

body[data-page-kind='tesseract'] a:focus-visible {
  outline: 3px solid var(--cobalt);
  outline-offset: 3px;
}

body[data-page-kind='tesseract'] .site-header a:focus-visible,
body[data-page-kind='tesseract'] .site-footer a:focus-visible,
body[data-page-kind='tesseract'] .tesseract-applications > .tesseract-shell a:focus-visible,
body[data-page-kind='tesseract'] .tesseract-closing a:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 3px;
}

.tesseract-page {
  --tesseract-heading-accent: var(--cobalt);
  background: var(--white);
}

body[data-page-kind='tesseract'] .tesseract-page :is(h1, h2) em {
  color: var(--tesseract-heading-accent);
  font-style: italic;
  font-weight: 400;
}

.tesseract-hero,
.tesseract-pillars,
.tesseract-impact,
.tesseract-applications,
.tesseract-closing {
  --tesseract-heading-accent: var(--teal);
}

.tesseract-shell {
  width: min(100% - (var(--tesseract-gutter) * 2), var(--tesseract-shell));
  margin-inline: auto;
}

body[data-page-kind='tesseract'] .tesseract-eyebrow {
  color: var(--cobalt);
  font-family: var(--font-eyebrow);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

body[data-page-kind='tesseract'] .tesseract-standfirst {
  font-family: var(--font-body);
  font-size: clamp(1.08rem, 1rem + 0.35vw, 1.28rem);
  line-height: 1.6;
}

body[data-page-kind='tesseract'] .tesseract-button,
body[data-page-kind='tesseract'] .tesseract-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.75rem;
  font-family: var(--font-ui);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
}

body[data-page-kind='tesseract'] .tesseract-button {
  justify-self: start;
  padding: 0.78rem 1.05rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  background: var(--midnight);
  color: var(--white);
  transition: transform 200ms cubic-bezier(.2, .7, .2, 1), box-shadow 200ms cubic-bezier(.2, .7, .2, 1);
}

body[data-page-kind='tesseract'] .tesseract-button.tesseract-button--dark {
  background: var(--white);
  color: var(--midnight);
}

body[data-page-kind='tesseract'] .tesseract-button.tesseract-button--light {
  background: var(--white);
  color: var(--midnight);
}

body[data-page-kind='tesseract'] .tesseract-link {
  color: var(--cobalt);
}

body[data-page-kind='tesseract'] .tesseract-applications .tesseract-link {
  color: var(--white);
}

.tesseract-button:hover,
.tesseract-link:hover {
  transform: translateY(-2px);
}

.tesseract-button:hover {
  box-shadow: var(--tesseract-hover-shadow);
}

.tesseract-button svg,
.tesseract-link svg {
  width: 1.05rem;
  height: 1.05rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.tesseract-hero {
  background: var(--midnight);
  color: var(--white);
}

body[data-page-kind='tesseract'] .tesseract-hero .tesseract-eyebrow {
  color: var(--teal);
}

.tesseract-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(20rem, 1.22fr);
  gap: clamp(2rem, 5vw, 6rem);
  align-items: center;
  min-height: clamp(36rem, 82vh, 54rem);
  padding-block: clamp(7rem, 12vw, 11rem) clamp(3rem, 7vw, 6rem);
}

.tesseract-hero__copy {
  display: grid;
  gap: 1.25rem;
}

.tesseract-hero h1 {
  max-width: 11ch;
  font-size: clamp(3rem, 5.4vw, 5.8rem);
}

.tesseract-hero__media {
  margin: 0;
}

/* The authored square animation is transparent over the Midnight hero. */
.tesseract-hero__stage {
  position: relative;
  width: min(100%, 40rem);
  margin-inline: auto;
  aspect-ratio: 1;
  isolation: isolate;
}

body[data-page-kind='tesseract'] .tesseract-hero__stage :is(img, video) {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: transparent;
}

.tesseract-hero__video { opacity: 0; }
.tesseract-hero__static { opacity: 1; }

[data-tesseract-video-root][data-video-started='true'][data-video-static='false'] .tesseract-hero__video { opacity: 1; }
[data-tesseract-video-root][data-video-started='true'][data-video-static='false'] .tesseract-hero__static { opacity: 0; }

.tesseract-paired-media figcaption,
.tesseract-gallery figcaption {
  margin-top: 0.7rem;
  color: currentColor;
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.4;
}

.tesseract-intro {
  padding-block: var(--tesseract-chapter-space) clamp(2rem, 3.5vw, 3.5rem);
  background: var(--white);
}

.tesseract-intro__grid,
.tesseract-forward__grid,
.tesseract-impact__grid,
.tesseract-applications__grid,
.tesseract-closing__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 4vw, 5rem);
  align-items: start;
}

.tesseract-intro h2,
.tesseract-forward h2,
.tesseract-section-heading h2,
.tesseract-impact h2,
.tesseract-applications h2,
.tesseract-closing h2 {
  max-width: 15ch;
  font-size: clamp(2.25rem, 1.55rem + 2.7vw, 4.5rem);
}

.tesseract-intro h2 {
  max-width: 19ch;
  font-size: clamp(2.25rem, 1.65rem + 2.1vw, 3.75rem);
}

.tesseract-intro__grid,
.tesseract-forward__grid,
.tesseract-applications__grid,
.tesseract-closing__grid {
  align-items: center;
}

body[data-page-kind='tesseract'] .tesseract-intro__copy p {
  max-width: 65ch;
  font-size: clamp(1.125rem, 1rem + 0.4vw, 1.375rem);
}

.tesseract-intro__copy,
.tesseract-forward__copy,
.tesseract-applications__copy {
  display: grid;
  gap: 1.25rem;
}

.tesseract-forward {
  padding-block: clamp(2rem, 3.5vw, 3.5rem) var(--tesseract-chapter-space);
  background: var(--white);
}

.tesseract-paired-media {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
}

.tesseract-paired-media__item {
  margin: 0;
  padding: 0.5rem;
  border: 1px solid var(--quiet);
  background: var(--white);
}

.tesseract-paired-media__item img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: var(--white);
}

.tesseract-pillars {
  padding-block: clamp(4rem, 8vw, 8rem);
  background: var(--midnight);
  color: var(--white);
}

body[data-page-kind='tesseract'] .tesseract-pillars .tesseract-eyebrow,
body[data-page-kind='tesseract'] .tesseract-impact .tesseract-eyebrow,
body[data-page-kind='tesseract'] .tesseract-applications .tesseract-eyebrow,
body[data-page-kind='tesseract'] .tesseract-closing .tesseract-eyebrow {
  color: var(--teal);
}

.tesseract-section-heading {
  display: grid;
  gap: 1rem;
  margin-bottom: clamp(2rem, 4vw, 4rem);
}

.tesseract-pillar-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.28);
  border-left: 1px solid rgba(255, 255, 255, 0.28);
}

.tesseract-pillar {
  display: grid;
  gap: 1rem;
  padding: clamp(1.1rem, 2.4vw, 2rem);
  border-right: 1px solid rgba(255, 255, 255, 0.28);
  border-bottom: 1px solid rgba(255, 255, 255, 0.28);
}

.tesseract-pillar span {
  color: var(--teal);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
}

.tesseract-step-list__number {
  color: var(--cobalt);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
}

.tesseract-pillar h3,
.tesseract-step-list h3,
.tesseract-impact h3 {
  font-size: clamp(1.4rem, 1.1rem + 1.05vw, 2rem);
  line-height: 1.08;
}

.tesseract-pillar p {
  color: var(--teal-pale);
}

.tesseract-paper-band.paper {
  z-index: 2;
  margin-bottom: calc(var(--tesseract-paper-outset) * -1);
  padding-block: clamp(4.5rem, 9vw, 9rem);
  color: var(--ink);
}

.tesseract-paper-band__inner {
  display: grid;
  gap: clamp(2rem, 4vw, 4rem);
}

.tesseract-step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  padding: 0;
  margin: 0;
  list-style: none;
}

.tesseract-step-list li {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 1rem;
  padding: clamp(1.1rem, 2.4vw, 2rem);
  border-left: 2px solid var(--cobalt);
}

.tesseract-step-list p {
  margin-top: 0.8rem;
}

.tesseract-impact {
  position: relative;
  z-index: 0;
  padding-block: calc(var(--tesseract-chapter-space) + var(--tesseract-paper-outset)) var(--tesseract-chapter-space);
  background: var(--midnight);
  color: var(--white);
}

.tesseract-impact__items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.28);
}

.tesseract-impact__items article {
  display: grid;
  gap: 0.8rem;
  padding: clamp(1.25rem, 2.5vw, 2rem);
  background: var(--midnight);
}

.tesseract-impact__items p {
  color: var(--teal-pale);
}

.tesseract-gallery {
  padding-block: var(--tesseract-chapter-space);
  background: var(--white);
}

.tesseract-gallery__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 3vw, 3rem) clamp(1rem, 2vw, 1.5rem);
}

.tesseract-gallery__item {
  margin: 0;
}

.tesseract-gallery__item img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: contain;
  background: var(--white);
  border: 1px solid var(--quiet);
}

.tesseract-applications {
  padding-block: var(--tesseract-chapter-space);
  background: var(--midnight);
  color: var(--white);
  position: relative;
  z-index: 0;
}

.tesseract-applications .tesseract-standfirst {
  max-width: 65ch;
  font-size: clamp(1.08rem, 1rem + 0.35vw, 1.28rem);
}

.tesseract-applications .tesseract-section-heading {
  margin: 0;
}

.tesseract-closing {
  padding-block: clamp(4rem, 8vw, 8rem);
  background: var(--midnight);
  color: var(--white);
  border-top: 1px solid rgba(255, 255, 255, 0.28);
}

.tesseract-closing__grid > div {
  justify-self: end;
}

@media (max-width: 1120px) {
  .tesseract-hero__grid,
  .tesseract-intro__grid,
  .tesseract-forward__grid,
  .tesseract-impact__grid,
  .tesseract-applications__grid,
  .tesseract-closing__grid {
    grid-template-columns: 1fr;
  }

  .tesseract-pillar-grid,
  .tesseract-step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tesseract-closing__grid > div {
    justify-self: start;
  }
}

@media (max-width: 701px) {
  body[data-page-kind='tesseract'] {
    --tesseract-gutter: 1.1rem;
  }

  .tesseract-hero__grid {
    min-height: auto;
    padding-block: 6.5rem 3rem;
  }

  .tesseract-hero h1 {
    font-size: clamp(2.5rem, 11.3vw, 4.75rem);
  }

  .tesseract-paired-media,
  .tesseract-pillar-grid,
  .tesseract-step-list,
  .tesseract-impact__items,
  .tesseract-gallery__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 390px) {
  body[data-page-kind='tesseract'] {
    --tesseract-gutter: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  body[data-page-kind='tesseract'] *,
  body[data-page-kind='tesseract'] *::before,
  body[data-page-kind='tesseract'] *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}