:root {
  --umber: #2b221e;
  --umber-deep: #171310;
  --umber-raised: #342a25;
  --mineral: #cfc4b1;
  --mineral-bright: #eee8dc;
  --muted: #9f9587;
  --slate: #70889a;
  --slate-bright: #a8bac7;
  --line: rgba(207, 196, 177, .16);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--mineral);
  background: var(--umber-deep);
  font-family: "Avenir Next", Avenir, "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

button, a { -webkit-tap-highlight-color: transparent; }

button:focus-visible, a:focus-visible {
  outline: 2px solid var(--slate-bright);
  outline-offset: 4px;
}

.masthead {
  min-height: 68vh;
  padding: clamp(2rem, 5vw, 5rem);
  display: grid;
  grid-template-columns: minmax(5rem, .65fr) minmax(20rem, 2.5fr) minmax(14rem, 1fr);
  align-items: end;
  gap: clamp(2rem, 6vw, 7rem);
  background: var(--umber);
  border-bottom: 1px solid var(--line);
}

.masthead__index {
  align-self: start;
  color: var(--slate);
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 500;
  line-height: .8;
  letter-spacing: -.07em;
}

.eyebrow {
  margin: 0 0 2.5rem;
  color: var(--slate-bright);
  font-size: .72rem;
  font-weight: 650;
  letter-spacing: .19em;
  text-transform: uppercase;
}

h1 {
  max-width: 13ch;
  margin: 0;
  color: var(--mineral-bright);
  font-size: clamp(3.1rem, 6.5vw, 6.5rem);
  font-weight: 500;
  letter-spacing: -.06em;
  line-height: .94;
}

.lede {
  max-width: 42rem;
  margin: 2.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.25rem);
}

.provenance {
  margin: 0;
  border-top: 1px solid var(--line);
}

.provenance div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 0;
  border-bottom: 1px solid var(--line);
}

.provenance dt {
  color: var(--muted);
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.provenance dd {
  margin: 0;
  color: var(--mineral-bright);
  font-size: .84rem;
}

main { padding: 0 clamp(1rem, 5vw, 5rem) 8rem; }

.principles {
  margin: 0 calc(clamp(1rem, 5vw, 5rem) * -1) 6rem;
  padding: 1rem clamp(1rem, 5vw, 5rem);
  display: flex;
  gap: 1rem 2.5rem;
  overflow-x: auto;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font-size: .71rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  white-space: nowrap;
}

.principles span::before {
  content: "—";
  margin-right: .65rem;
  color: var(--slate);
}

.flow {
  max-width: 100rem;
  margin: 0 auto;
}

.flow + .flow { margin-top: 9rem; }

.flow__header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  display: grid;
  grid-template-columns: 6rem minmax(16rem, 1fr) minmax(18rem, 1fr);
  align-items: end;
  gap: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.flow__header p {
  margin: 0;
  color: var(--slate);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.flow__header h2 {
  margin: 0;
  color: var(--mineral-bright);
  font-size: clamp(2rem, 3.5vw, 3.6rem);
  font-weight: 500;
  letter-spacing: -.045em;
  line-height: 1;
}

.flow__header span {
  max-width: 34rem;
  color: var(--muted);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 4.5rem 2rem;
}

.concept { min-width: 0; }

.concept__image {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  overflow: hidden;
  color: inherit;
  background: var(--umber);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: zoom-in;
  box-shadow: 0 2rem 5rem rgba(0, 0, 0, .28);
}

.concept__image::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, .045);
  border-radius: inherit;
  pointer-events: none;
}

.concept__image img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform .55s cubic-bezier(.2, .72, .18, 1), filter .55s ease;
}

.concept__image:hover img {
  transform: scale(1.012);
  filter: saturate(1.025);
}

.concept__zoom {
  position: absolute;
  right: .75rem;
  bottom: .75rem;
  padding: .5rem .68rem;
  color: var(--mineral-bright);
  background: rgba(35, 28, 24, .86);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
  font-size: .62rem;
  font-weight: 650;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.concept__body {
  padding-top: 1.15rem;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: .9rem;
  border-top: 1px solid var(--slate);
}

.concept__body > span {
  color: var(--slate-bright);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.concept h3 {
  margin: -.2rem 0 .5rem;
  color: var(--mineral-bright);
  font-size: clamp(1.35rem, 2vw, 1.9rem);
  font-weight: 500;
  letter-spacing: -.035em;
}

.concept p {
  margin: 0;
  color: var(--muted);
  font-size: .92rem;
}

.flow--platform .concept { grid-column: span 1; }

footer {
  padding: 2rem clamp(1rem, 5vw, 5rem);
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  color: var(--muted);
  background: var(--umber);
  border-top: 1px solid var(--line);
  font-size: .72rem;
  letter-spacing: .04em;
}

footer p {
  max-width: 48rem;
  margin: 0;
}

.viewer {
  width: 100vw;
  max-width: none;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: 0;
  color: var(--mineral);
  background: rgba(18, 14, 12, .98);
  border: 0;
}

.viewer::backdrop { background: rgba(0, 0, 0, .84); }
.viewer[open] { display: grid; grid-template-rows: auto 1fr; }

.viewer__bar {
  min-height: 4.5rem;
  padding: .85rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.viewer__bar > div {
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.viewer__bar h2 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 500;
}

.viewer__count {
  color: var(--slate-bright);
  font-size: .65rem;
  letter-spacing: .16em;
}

.viewer__close, .viewer__nav {
  color: inherit;
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
}

.viewer__close {
  min-height: 2.75rem;
  padding: 0 1rem;
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.viewer__stage {
  min-height: 0;
  display: grid;
  grid-template-columns: 4.5rem 1fr 4.5rem;
  align-items: center;
}

.viewer__image {
  display: block;
  max-width: min(92vw, 68rem);
  max-height: calc(100dvh - 6.5rem);
  margin: auto;
  object-fit: contain;
  box-shadow: 0 2rem 6rem rgba(0, 0, 0, .42);
}

.viewer__nav {
  width: 3.25rem;
  height: 3.25rem;
  margin: auto;
  border-radius: 50%;
  font-size: 1.25rem;
}

@media (max-width: 1100px) {
  .gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow__header { grid-template-columns: 5rem 1fr; }
  .flow__header span { grid-column: 2; }
}

@media (max-width: 700px) {
  .masthead {
    min-height: auto;
    padding: 2rem 1rem 4rem;
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .masthead__index {
    position: absolute;
    top: 2.5rem;
    right: 1.3rem;
    font-size: 4.5rem;
    opacity: .72;
  }

  .masthead__copy { padding-top: 6rem; }
  h1 { font-size: clamp(3rem, 14vw, 4.8rem); }
  main { padding-inline: 1rem; }
  .principles { margin-inline: -1rem; padding-inline: 1rem; }
  .flow + .flow { margin-top: 6rem; }

  .flow__header {
    grid-template-columns: 1fr;
    gap: .75rem;
  }

  .flow__header span { grid-column: auto; }
  .gallery { grid-template-columns: 1fr; gap: 4rem; }
  .concept__body { grid-template-columns: 2.2rem 1fr; }
  footer { display: block; }
  footer span { display: block; margin-top: 1rem; }

  .viewer__stage {
    grid-template-columns: 1fr;
    padding: .5rem;
  }

  .viewer__nav {
    position: fixed;
    z-index: 2;
    bottom: 1rem;
    background: rgba(43, 34, 30, .9);
    backdrop-filter: blur(12px);
  }

  .viewer__nav--prev { left: 1rem; }
  .viewer__nav--next { right: 1rem; }
  .viewer__image { max-width: 100%; max-height: calc(100dvh - 6rem); }
}

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