:root {
  --ink: #111111;
  --paper: #f2efe7;
  --paper-bright: #faf8f2;
  --silver: #a6a39d;
  --rule: rgba(17, 17, 17, 0.2);
  --page: clamp(1.25rem, 3.4vw, 4.5rem);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

button,
a {
  color: inherit;
}

button {
  font: inherit;
}

a {
  text-decoration: none;
}

img,
video {
  display: block;
  max-width: 100%;
}

::selection {
  color: var(--paper);
  background: var(--ink);
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  height: 4.5rem;
  padding: 0 var(--page);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--rule);
  background: rgba(242, 239, 231, 0.93);
  backdrop-filter: blur(16px);
}

.header-mark {
  width: max-content;
  display: inline-flex;
  align-items: center;
}

.header-logo {
  width: clamp(5rem, 6.5vw, 6.5rem);
  filter: invert(1);
}

.header-edition,
.site-header nav,
.section-number,
.eyebrow,
.concept-meta span,
.badge-stage-label,
.badge-selector,
.badge-strip span,
.video-index,
.swatch,
.type-specimen div,
.footer-note {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.66rem;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-edition {
  margin: 0;
}

.site-header nav {
  display: flex;
  justify-content: flex-end;
  gap: 1.75rem;
}

.site-header nav a {
  position: relative;
  padding: 0.4rem 0;
}

.site-header nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--ink);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms ease;
}

.site-header nav a:hover::after,
.site-header nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.hero {
  position: relative;
  min-height: calc(100svh - 4.5rem);
  padding: clamp(5rem, 10vh, 8rem) var(--page) 2rem;
  display: grid;
  grid-template-rows: 1fr auto;
  overflow: hidden;
  color: var(--paper);
  background: var(--ink);
}

.hero::before {
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 5rem 5rem;
  content: "";
  pointer-events: none;
}

.hero-index {
  position: absolute;
  top: 1.5rem;
  right: var(--page);
  left: var(--page);
  display: flex;
  justify-content: space-between;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.65rem;
}

.hero-logo-wrap {
  align-self: center;
  padding: 3rem 0;
  animation: reveal-mark 900ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-logo {
  width: min(100%, 105rem);
  margin: 0 auto;
}

.hero-footer {
  position: relative;
  padding-top: 1.5rem;
  display: grid;
  grid-template-columns: 1fr minmax(16rem, 31rem) auto;
  gap: 3rem;
  align-items: end;
  border-top: 1px solid rgba(242, 239, 231, 0.35);
}

.eyebrow {
  margin: 0 0 1rem;
  display: flex;
  gap: 0.65rem;
  align-items: center;
  color: rgba(17, 17, 17, 0.56);
}

.eyebrow-inverse {
  color: rgba(242, 239, 231, 0.65);
}

.status-dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: #d9ff4f;
  box-shadow: 0 0 0 0.25rem rgba(217, 255, 79, 0.1);
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.7rem, 3.2vw, 3.5rem);
  font-weight: 500;
  letter-spacing: -0.055em;
}

.hero-rationale {
  margin: 0;
  max-width: 31rem;
  color: rgba(242, 239, 231, 0.72);
  font-size: clamp(0.88rem, 1.1vw, 1rem);
  line-height: 1.55;
}

.round-link {
  width: 3.4rem;
  height: 3.4rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(242, 239, 231, 0.45);
  border-radius: 50%;
  font-size: 1rem;
  transition: color 200ms ease, background 200ms ease, transform 200ms ease;
}

.round-link:hover,
.round-link:focus-visible {
  color: var(--ink);
  background: var(--paper);
  transform: translateY(0.25rem);
}

.overview,
.concepts-section,
.motion-section,
.applications-section {
  padding: clamp(5rem, 10vw, 10rem) var(--page);
}

.overview {
  min-height: 80svh;
  display: grid;
  grid-template-columns: minmax(8rem, 0.45fr) 1.5fr 0.75fr;
  gap: 3rem;
  border-bottom: 1px solid var(--rule);
}

.section-number {
  margin: 0;
  color: rgba(17, 17, 17, 0.5);
}

.section-number-inverse {
  color: rgba(242, 239, 231, 0.5);
}

.overview h2,
.section-heading-row h2,
.badge-intro h2,
.motion-heading h2,
.applications-heading h2,
.system-heading h2 {
  margin: 0;
  font-size: clamp(2.9rem, 6.7vw, 7.6rem);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: -0.075em;
}

.overview-notes {
  align-self: end;
}

.overview-notes > p {
  margin: 0 0 4rem;
  font-size: 1rem;
  line-height: 1.55;
}

.overview-notes dl {
  margin: 0;
}

.overview-notes dl div {
  padding: 0.8rem 0;
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.75rem;
}

.overview-notes dt {
  color: rgba(17, 17, 17, 0.52);
}

.overview-notes dd {
  margin: 0;
  text-align: right;
}

.section-heading-row {
  margin-bottom: clamp(3rem, 7vw, 7rem);
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  align-items: flex-end;
}

.section-heading-row .section-number,
.applications-heading .section-number,
.motion-heading .section-number,
.system-heading .section-number {
  margin-bottom: 2rem;
}

.surface-control {
  padding: 0.25rem;
  display: flex;
  border: 1px solid var(--rule);
  border-radius: 2rem;
}

.surface-control button {
  min-width: 5.2rem;
  padding: 0.7rem 1rem;
  border: 0;
  border-radius: 1.5rem;
  color: rgba(17, 17, 17, 0.5);
  background: transparent;
  cursor: pointer;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.surface-control button.active {
  color: var(--paper);
  background: var(--ink);
}

.recommended-card,
.concept-card {
  --card-bg: var(--ink);
  --card-fg: var(--paper);
  margin: 0 0 1.25rem;
}

.recommended-card.light,
.concept-card.light {
  --card-bg: var(--paper-bright);
  --card-fg: var(--ink);
}

.concept-art {
  position: relative;
  min-height: clamp(17rem, 30vw, 31rem);
  padding: clamp(2rem, 5.5vw, 6rem);
  display: grid;
  place-items: center;
  overflow: hidden;
  background: var(--card-bg);
  transition: background 260ms ease;
}

.concept-art::before {
  position: absolute;
  top: 1rem;
  bottom: 1rem;
  left: 50%;
  width: 1px;
  opacity: 0.15;
  background: var(--card-fg);
  content: "";
}

.concept-art::after {
  position: absolute;
  top: 50%;
  right: 1rem;
  left: 1rem;
  height: 1px;
  opacity: 0.15;
  background: var(--card-fg);
  content: "";
}

.concept-art img {
  position: relative;
  z-index: 1;
  width: min(88%, 68rem);
  max-height: 17rem;
  object-fit: contain;
}

.light .concept-art img {
  filter: invert(1);
}

.concept-art-primary {
  min-height: clamp(26rem, 55vw, 48rem);
}

.concept-art-primary img {
  width: min(78%, 78rem);
  max-height: none;
}

.recommendation-stamp {
  position: absolute;
  z-index: 2;
  top: 1.25rem;
  right: 1.25rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid color-mix(in srgb, var(--card-fg) 45%, transparent);
  border-radius: 2rem;
  color: var(--card-fg);
  font-family: "Courier New", Courier, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.concept-meta {
  padding: 1.15rem 0 3.5rem;
  display: grid;
  grid-template-columns: 1fr minmax(13rem, 24rem);
  gap: 2rem;
  border-top: 1px solid var(--rule);
}

.concept-meta > div {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.5rem;
}

.concept-meta h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}

.concept-meta p {
  margin: 0;
  color: rgba(17, 17, 17, 0.6);
  font-size: 0.78rem;
  line-height: 1.5;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 2rem;
}

.concept-card:nth-child(3n) .concept-art {
  min-height: clamp(21rem, 36vw, 36rem);
}

.badge-section {
  padding: clamp(5rem, 10vw, 10rem) var(--page) 0;
  display: grid;
  grid-template-columns: minmax(18rem, 0.75fr) minmax(24rem, 1.25fr);
  color: var(--paper);
  background: var(--ink);
}

.badge-intro {
  padding: 0 clamp(2rem, 5vw, 6rem) 7rem 0;
}

.badge-intro h2 {
  margin-top: clamp(3rem, 8vw, 8rem);
}

.badge-description {
  max-width: 26rem;
  margin: 3rem 0 4rem;
  color: rgba(242, 239, 231, 0.62);
  font-size: 0.95rem;
  line-height: 1.6;
}

.badge-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.badge-selector button {
  width: 2.8rem;
  height: 2.8rem;
  border: 1px solid rgba(242, 239, 231, 0.25);
  border-radius: 50%;
  color: rgba(242, 239, 231, 0.52);
  background: transparent;
  cursor: pointer;
}

.badge-selector button.active {
  color: var(--ink);
  background: var(--paper);
}

.badge-stage {
  position: relative;
  min-height: 48rem;
  padding: clamp(2rem, 4vw, 4rem);
  display: grid;
  place-items: center;
  color: var(--ink);
  background: var(--paper-bright);
}

.badge-stage > img {
  width: min(70%, 30rem);
  max-height: 30rem;
  object-fit: contain;
  animation: badge-in 320ms ease both;
}

.badge-stage-label {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  left: 1.5rem;
  display: flex;
  justify-content: space-between;
}

.badge-scale {
  position: absolute;
  right: 1.5rem;
  bottom: 1.5rem;
  left: 1.5rem;
  display: flex;
  gap: 0.85rem;
  align-items: center;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.badge-scale img {
  width: 3rem;
  height: 3rem;
  margin-left: auto;
  object-fit: contain;
}

.badge-strip {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border-top: 1px solid rgba(242, 239, 231, 0.18);
}

.badge-strip button {
  position: relative;
  padding: 2.2rem 1rem 1.1rem;
  display: grid;
  gap: 1.4rem;
  place-items: center;
  border: 0;
  border-right: 1px solid rgba(242, 239, 231, 0.18);
  color: var(--paper);
  background: transparent;
  cursor: pointer;
}

.badge-strip button:last-child {
  border-right: 0;
}

.badge-strip button::before {
  position: absolute;
  inset: 0;
  opacity: 0;
  background: rgba(242, 239, 231, 0.06);
  content: "";
  transition: opacity 180ms ease;
}

.badge-strip button:hover::before,
.badge-strip button.active::before {
  opacity: 1;
}

.badge-strip img {
  width: min(75%, 7rem);
  height: 7rem;
  object-fit: contain;
}

.badge-strip span {
  opacity: 0.5;
}

.motion-heading {
  margin-bottom: clamp(3rem, 7vw, 7rem);
  display: grid;
  grid-template-columns: 1fr minmax(15rem, 26rem);
  gap: 3rem;
  align-items: end;
}

.motion-heading > p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.55;
}

.video-frame {
  position: relative;
  padding: clamp(0.75rem, 2vw, 1.5rem);
  background: var(--ink);
}

.video-frame video {
  width: 100%;
  max-height: 82svh;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #000;
}

.video-index {
  padding: 1rem 0 0;
  display: flex;
  justify-content: space-between;
  color: rgba(242, 239, 231, 0.6);
}

.applications-section {
  padding-top: 4rem;
}

.applications-heading {
  margin-bottom: clamp(4rem, 9vw, 9rem);
  display: grid;
  grid-template-columns: minmax(8rem, 0.45fr) 1.5fr;
  gap: 3rem;
}

.applications-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(3rem, 7vw, 7rem) clamp(1.25rem, 3vw, 3rem);
}

.applications-grid figure {
  margin: 0;
}

.application-image-wrap {
  overflow: hidden;
  background: #d8d5cf;
}

.application-image-wrap img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

.applications-grid figure:hover img {
  transform: scale(1.018);
}

.applications-grid .application-wide {
  grid-column: 1 / -1;
}

.application-wide .application-image-wrap img {
  aspect-ratio: 16 / 9;
}

.applications-grid figcaption {
  padding-top: 1rem;
  display: grid;
  grid-template-columns: 4rem 1fr;
  border-top: 1px solid var(--rule);
}

.applications-grid figcaption > span {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.65rem;
}

.applications-grid figcaption h3 {
  margin: 0 0 0.3rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.applications-grid figcaption p {
  margin: 0;
  color: rgba(17, 17, 17, 0.58);
  font-size: 0.72rem;
}

.system-section {
  padding: clamp(5rem, 10vw, 10rem) var(--page);
  color: var(--paper);
  background: var(--ink);
}

.system-heading {
  margin-bottom: clamp(4rem, 9vw, 9rem);
  display: grid;
  grid-template-columns: minmax(8rem, 0.45fr) 1.5fr;
  gap: 3rem;
}

.color-system {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.8fr;
  border: 1px solid rgba(242, 239, 231, 0.23);
}

.swatch {
  min-height: 17rem;
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid rgba(242, 239, 231, 0.23);
}

.swatch:last-child {
  border-right: 0;
}

.swatch-ink {
  color: var(--paper);
  background: var(--ink);
}

.swatch-paper {
  color: var(--ink);
  background: var(--paper);
}

.swatch-silver {
  color: var(--ink);
  background: var(--silver);
}

.type-specimen {
  padding: clamp(4rem, 8vw, 8rem) 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: end;
}

.foundation-logo {
  width: min(100%, 48rem);
  max-height: 14rem;
  object-fit: contain;
  object-position: left center;
}

.type-specimen div {
  padding-left: 3rem;
  display: grid;
  gap: 0.7rem;
  color: rgba(242, 239, 231, 0.54);
}

footer {
  min-height: 18rem;
  padding: 3rem var(--page);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: end;
  background: var(--paper);
}

footer > div > p:last-child {
  margin: 1rem 0 0;
  color: rgba(17, 17, 17, 0.58);
  font-size: 0.75rem;
}

.footer-logo {
  width: clamp(8rem, 12vw, 12rem);
  filter: invert(1);
}

footer .footer-note {
  margin: 0;
}

footer > a {
  justify-self: end;
  font-size: 0.72rem;
  text-decoration: underline;
  text-underline-offset: 0.3rem;
}

@keyframes reveal-mark {
  from {
    opacity: 0;
    transform: translateY(2rem);
    clip-path: inset(0 100% 0 0);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    clip-path: inset(0 0 0 0);
  }
}

@keyframes badge-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .header-edition {
    display: none;
  }

  .site-header nav {
    gap: 1rem;
  }

  .site-header nav a:nth-child(3),
  .site-header nav a:nth-child(4) {
    display: none;
  }

  .hero {
    min-height: 46rem;
  }

  .hero-footer {
    grid-template-columns: 1fr auto;
  }

  .hero-rationale {
    grid-row: 2;
    margin-top: 0.5rem;
  }

  .round-link {
    grid-row: 1 / span 2;
    grid-column: 2;
  }

  .overview {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .overview-notes {
    max-width: 33rem;
  }

  .badge-section {
    grid-template-columns: 1fr;
  }

  .badge-intro {
    padding-right: 0;
  }

  .badge-stage {
    min-height: 36rem;
  }

  .badge-strip {
    overflow-x: auto;
    grid-template-columns: repeat(7, minmax(8rem, 1fr));
  }

  .applications-heading,
  .system-heading {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    height: 4rem;
  }

  .hero {
    min-height: calc(100svh - 4rem);
    padding-top: 4rem;
  }

  .hero-logo-wrap {
    padding: 2rem 0;
  }

  .hero-footer {
    gap: 1.5rem;
  }

  .hero-rationale {
    padding-right: 1rem;
    font-size: 0.8rem;
  }

  .round-link {
    width: 3rem;
    height: 3rem;
  }

  .section-heading-row {
    display: grid;
  }

  .surface-control {
    width: max-content;
  }

  .concept-grid,
  .applications-grid {
    grid-template-columns: 1fr;
  }

  .concept-card:nth-child(3n) .concept-art,
  .concept-art {
    min-height: 18rem;
  }

  .concept-art-primary {
    min-height: 24rem;
  }

  .concept-meta {
    grid-template-columns: 1fr;
  }

  .concept-meta p {
    padding-left: 3.5rem;
  }

  .badge-stage {
    min-height: 30rem;
  }

  .motion-heading {
    grid-template-columns: 1fr;
  }

  .applications-grid .application-wide {
    grid-column: auto;
  }

  .application-wide .application-image-wrap img {
    aspect-ratio: 4 / 3;
  }

  .color-system {
    grid-template-columns: 1fr;
  }

  .swatch {
    min-height: 10rem;
    border-right: 0;
    border-bottom: 1px solid rgba(242, 239, 231, 0.23);
  }

  .swatch:last-child {
    border-bottom: 0;
  }

  .type-specimen {
    grid-template-columns: 1fr;
    gap: 4rem;
  }

  .type-specimen div {
    padding-left: 0;
  }

  footer {
    grid-template-columns: 1fr auto;
  }

  .footer-note {
    display: none;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}