/* OH Concepts — Bosphorus Octahedron / 8D Design Model */

:root {
  --ink: #0c141c;
  --night: #1a2228;
  --plaster: #e6d9c8;
  --bone: #f4efe6;
  --copper: #b86a3d;
  --brass: #c4a574;
  --teal: #1f4f52;
  --iron: #3c3832;
  --candle: #f2e2c4;
  --signal: #a85a42;

  --d1: #7a9bb8;
  --d2: #c4a574;
  --d3: #8b7355;
  --d4: #f2e2c4;
  --d5: #b86a3d;
  --d6: #9a8574;
  --d7: #3d7a7c;
  --d8: #e6d9c8;

  --font-display: "Fraunces", "Iowan Old Style", serif;
  --font-body: "Outfit", "Avenir Next", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --ease-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration: 560ms;

  --space: clamp(1.25rem, 2.4vw, 2.5rem);
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --measure: 62ch;
  --header-h: 4.75rem;
  --line: 1px solid color-mix(in srgb, var(--plaster) 18%, transparent);

  --focus: 0 0 0 2px var(--ink), 0 0 0 4px var(--brass);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--ink);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0;
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
}

::selection {
  background: var(--copper);
  color: var(--bone);
}

/* Atmosphere */
.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 80;
  opacity: 0.11;
  mix-blend-mode: overlay;
  background-image: url("../img/tex-plaster.jpg");
  background-size: 420px;
  animation: grain-shift 18s steps(6) infinite;
}

@keyframes grain-shift {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-2%, 1%);
  }
}

/* Page plane for transitions */
#page-root {
  position: relative;
  transform-origin: 50% 40%;
  transition: transform var(--duration) var(--ease-expo), opacity var(--duration) var(--ease-expo);
  min-height: 100vh;
}

body.is-leaving #page-root {
  transform: translateZ(-80px) scale(0.96);
  opacity: 0;
  filter: blur(6px);
}

body.is-entering #page-root {
  animation: plane-in var(--duration) var(--ease-expo) both;
}

@keyframes plane-in {
  from {
    transform: translateZ(60px) scale(1.04);
    opacity: 0;
  }
  to {
    transform: none;
    opacity: 1;
  }
}

/* Curtain */
.curtain {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  display: grid;
  grid-template-rows: 1fr;
}

.curtain-plane {
  background:
    linear-gradient(180deg, rgba(12, 20, 28, 0.2), transparent 40%),
    url("../img/tex-plaster.jpg") center / cover;
  transform-origin: 50% 0%;
  animation: curtain-lift 1.05s var(--ease-expo) 0.15s both;
}

@keyframes curtain-lift {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-105%);
  }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
  padding: 0 var(--gutter);
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  border-bottom: var(--line);
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  z-index: 2;
}

.logo-mark {
  width: 1.35rem;
  height: 1.35rem;
  color: var(--copper);
  transform: translateY(0.12rem);
}

.logo-oh {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
}

.logo-concepts {
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--plaster);
  opacity: 0.8;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 0.15rem 1.35rem;
}

.nav-desktop a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--bone) 72%, var(--iron));
  position: relative;
  padding: 0.35rem 0;
}

.nav-desktop a[aria-current="page"],
.nav-desktop a:hover {
  color: var(--bone);
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-expo);
}

.nav-desktop a[aria-current="page"]::after,
.nav-desktop a:hover::after,
.nav-desktop a:focus-visible::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  color: var(--bone);
  clip-path: polygon(30% 4%, 70% 4%, 96% 30%, 96% 70%, 70% 96%, 30% 96%, 4% 70%, 4% 30%);
  border: 1px solid color-mix(in srgb, var(--copper) 70%, transparent);
  background: color-mix(in srgb, var(--night) 80%, transparent);
  position: relative;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 0.95rem;
  height: 1px;
  background: var(--bone);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
}

.menu-toggle span::before {
  transform: translate(-50%, calc(-50% - 5px));
}

.menu-toggle span::after {
  transform: translate(-50%, calc(-50% + 5px));
}

body.nav-open .menu-toggle span {
  background: transparent;
}

body.nav-open .menu-toggle span::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

body.nav-open .menu-toggle span::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.nav-mobile {
  position: fixed;
  inset: 0;
  z-index: 55;
  background:
    linear-gradient(160deg, rgba(12, 20, 28, 0.96), rgba(26, 34, 40, 0.94)),
    url("../img/tex-plaster.jpg") center / cover;
  display: grid;
  place-items: center;
  padding: 5rem 1.5rem 2rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: scale(0.92) rotate(-4deg);
  clip-path: polygon(10% 0, 90% 0, 100% 10%, 100% 90%, 90% 100%, 10% 100%, 0 90%, 0 10%);
  transition:
    opacity 0.5s var(--ease-expo),
    transform 0.55s var(--ease-expo),
    visibility 0.55s;
}

body.nav-open .nav-mobile {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
}

.nav-mobile-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  text-align: center;
}

.nav-mobile-list a {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 6vw, 3rem);
  font-optical-sizing: auto;
}

.nav-mobile-list a span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--copper);
  margin-bottom: 0.15rem;
}

/* HUD */
.dim-hud {
  position: fixed;
  right: var(--gutter);
  bottom: 1.4rem;
  z-index: 50;
  min-width: 11.5rem;
  padding: 0.7rem 0.85rem 0.8rem;
  border: 1px solid color-mix(in srgb, var(--plaster) 22%, transparent);
  background: color-mix(in srgb, var(--ink) 78%, transparent);
  font-family: var(--font-mono);
  pointer-events: none;
}

.dim-hud .k {
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  color: var(--copper);
}

.dim-hud .id {
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  margin-top: 0.15rem;
}

.dim-hud .def {
  font-size: 0.68rem;
  color: var(--plaster);
  margin-top: 0.2rem;
  max-width: 16ch;
  line-height: 1.35;
}

/* Buttons */
.btn {
  --mx: 50%;
  --my: 50%;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1.35rem;
  border: 1px solid var(--copper);
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: transform 0.35s var(--ease-expo), border-color 0.3s;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120px 80px at var(--mx) var(--my), rgba(196, 165, 116, 0.45), transparent 55%);
  opacity: 0;
  transition: opacity 0.35s;
  z-index: -1;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  border-color: var(--brass);
}

.btn:hover::before,
.btn:focus-visible::before {
  opacity: 1;
}

.btn:active {
  transform: translateY(0);
}

.btn-solid {
  background: var(--copper);
  border-color: var(--copper);
  color: var(--ink);
}

.btn-solid:hover {
  background: color-mix(in srgb, var(--copper) 80%, var(--candle));
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: stretch;
  overflow: hidden;
  perspective: 1400px;
}

.hero-stack {
  position: absolute;
  inset: -6%;
  transform-style: preserve-3d;
  will-change: transform;
}

.layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  will-change: transform;
}

.layer img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.layer-vignette {
  background:
    radial-gradient(ellipse at 50% 40%, transparent 20%, rgba(12, 20, 28, 0.55) 70%, var(--ink) 100%),
    linear-gradient(180deg, transparent 50%, var(--ink) 100%);
}

.layer-lines {
  background:
    linear-gradient(90deg, transparent 49.85%, color-mix(in srgb, var(--brass) 35%, transparent) 50%, transparent 50.15%),
    linear-gradient(0deg, transparent 49.85%, color-mix(in srgb, var(--brass) 25%, transparent) 50%, transparent 50.15%);
  opacity: 0.55;
  mix-blend-mode: screen;
}

.layer-shaft {
  background: linear-gradient(118deg, transparent 38%, rgba(242, 226, 196, 0.08) 48%, transparent 62%);
  mix-blend-mode: screen;
}

.layer-tex {
  background: url("../img/tex-copper.jpg") center / 38% no-repeat;
  opacity: 0.18;
  mix-blend-mode: soft-light;
}

.layer-specular {
  background: radial-gradient(220px 160px at var(--lx, 70%) var(--ly, 30%), rgba(242, 226, 196, 0.22), transparent 60%);
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 4;
  align-self: end;
  padding: 0 var(--gutter) 7.5rem;
  max-width: 52rem;
}

.whisper {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 0.8rem;
}

.hero h1 {
  font-size: clamp(3.2rem, 9vw, 8.2rem);
  font-optical-sizing: auto;
  font-weight: 300;
  line-height: 0.9;
  max-width: 11ch;
}

.hero-claim {
  margin-top: 1.25rem;
  max-width: 36ch;
  color: var(--plaster);
  font-size: 1.05rem;
}

/* Compass */
.compass-wrap {
  position: absolute;
  right: clamp(1rem, 6vw, 6rem);
  top: 18%;
  z-index: 5;
  width: min(42vw, 420px);
  aspect-ratio: 1;
  perspective: 900px;
}

.compass {
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  will-change: transform;
}

.compass svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.facet {
  cursor: pointer;
  fill: color-mix(in srgb, var(--night) 55%, transparent);
  stroke: color-mix(in srgb, var(--plaster) 35%, transparent);
  stroke-width: 0.6;
  transition: fill 0.35s var(--ease-expo), stroke 0.35s, filter 0.35s;
}

.facet:hover,
.facet:focus,
.facet.is-hot {
  fill: color-mix(in srgb, var(--facet, var(--copper)) 55%, var(--ink));
  stroke: var(--facet, var(--copper));
  filter: drop-shadow(0 0 12px color-mix(in srgb, var(--facet, var(--copper)) 50%, transparent));
}

.compass-core {
  fill: var(--ink);
  stroke: var(--copper);
  stroke-width: 0.8;
}

.compass-readout {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  width: 46%;
}

.compass-readout .id {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  color: var(--brass);
}

.compass-readout .name {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.2vw, 1.6rem);
  margin: 0.2rem 0;
}

.compass-readout .line {
  font-size: 0.72rem;
  color: var(--plaster);
  line-height: 1.3;
}

.swatch {
  width: 1.6rem;
  height: 0.35rem;
  margin: 0.45rem auto 0;
  background: var(--swatch, var(--copper));
}

/* Sections */
.section {
  position: relative;
  padding: clamp(4rem, 10vw, 8.5rem) var(--gutter);
}

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.5rem;
  align-items: end;
  margin-bottom: clamp(2rem, 5vw, 4rem);
  max-width: 90rem;
}

.dim-no {
  font-family: var(--font-mono);
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 0.8;
  color: color-mix(in srgb, var(--accent, var(--copper)) 70%, transparent);
  letter-spacing: -0.06em;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 0.4rem;
}

.lede {
  max-width: var(--measure);
  color: var(--plaster);
  font-size: 1.05rem;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
}

/* Dimension spatial panels — not a card grid */
.dim-field {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  grid-template-rows: auto auto auto;
  gap: 0.7rem 0.7rem;
  max-width: 92rem;
  margin: 0 auto;
}

.dim-panel {
  position: relative;
  min-height: 16rem;
  overflow: hidden;
  isolation: isolate;
  color: var(--bone);
  transform: translateZ(0);
  transition: transform 0.7s var(--ease-expo), filter 0.7s var(--ease-expo);
}

.dim-panel img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
  filter: saturate(0.85) contrast(1.05);
  transition: transform 1.1s var(--ease-expo);
}

.dim-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(12, 20, 28, 0.1), rgba(12, 20, 28, 0.72) 70%);
  z-index: 0;
}

.dim-panel .inner {
  position: relative;
  z-index: 1;
  padding: 1.25rem 1.35rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.dim-panel .no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.dim-panel h3 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin: 0.2rem 0 0.4rem;
}

.dim-panel p {
  max-width: 32ch;
  color: var(--plaster);
  font-size: 0.95rem;
}

.dim-panel:hover img,
.dim-panel:focus-within img {
  transform: scale(1.06);
}

.dim-panel:nth-child(1) {
  grid-column: 1;
  grid-row: 1 / span 2;
  min-height: 34rem;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 88% 100%, 0 100%);
}

.dim-panel:nth-child(2) {
  grid-column: 2 / span 2;
  min-height: 14rem;
}

.dim-panel:nth-child(3) {
  grid-column: 2;
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0 100%, 0 12%);
}

.dim-panel:nth-child(4) {
  grid-column: 3;
}

.dim-panel:nth-child(5) {
  grid-column: 1;
}

.dim-panel:nth-child(6) {
  grid-column: 2;
}

.dim-panel:nth-child(7) {
  grid-column: 3;
  grid-row: 3;
}

.dim-panel:nth-child(8) {
  grid-column: 1 / span 2;
  min-height: 12rem;
}

/* Works strip */
.works-strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(18rem, 28vw);
  gap: 0.6rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 0.8rem;
  margin-inline: calc(var(--gutter) * -0.2);
  padding-inline: 0.2rem;
}

.work-tile {
  scroll-snap-align: start;
  position: relative;
  min-height: 22rem;
  overflow: hidden;
  isolation: isolate;
}

.work-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  z-index: -1;
  transition: transform 0.9s var(--ease-expo);
}

.work-tile:hover img {
  transform: scale(1.05);
}

.work-tile .meta {
  position: absolute;
  inset: auto 0 0 0;
  padding: 1.1rem;
  background: linear-gradient(transparent, rgba(12, 20, 28, 0.85));
}

.work-tile .cat {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brass);
}

.work-tile h3 {
  font-size: 1.35rem;
}

/* Founders duet */
.duet {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 0;
  max-width: 92rem;
}

.duet-col {
  padding: clamp(1.5rem, 4vw, 3.5rem);
  min-height: 28rem;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.duet-col:first-child {
  background:
    linear-gradient(180deg, rgba(12, 20, 28, 0.25), rgba(12, 20, 28, 0.78)),
    url("../img/founders-hands.jpg") center / cover;
  clip-path: polygon(0 0, 100% 0, 92% 100%, 0 100%);
}

.duet-col:last-child {
  background:
    linear-gradient(180deg, rgba(12, 20, 28, 0.2), rgba(12, 20, 28, 0.8)),
    url("../img/founders-materials.jpg") center / cover;
  margin-left: -4%;
  margin-top: 8%;
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0 100%);
}

.arab {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--candle);
  direction: rtl;
}

/* Process layers */
.process {
  position: relative;
  min-height: 28rem;
  max-width: 70rem;
}

.process-layer {
  position: relative;
  padding: 2rem 2.2rem;
  margin-left: calc(var(--i, 0) * 8%);
  margin-top: -1.6rem;
  border: 1px solid color-mix(in srgb, var(--plaster) 20%, transparent);
  background: color-mix(in srgb, var(--night) 82%, transparent);
  backdrop-filter: blur(2px);
}

.process-layer:first-child {
  margin-top: 0;
}

.process-layer h3 {
  font-size: 2rem;
}

/* CTA band */
.cta-band {
  margin: 0 var(--gutter) clamp(3rem, 8vw, 6rem);
  padding: clamp(2.5rem, 6vw, 5rem);
  background:
    linear-gradient(120deg, rgba(12, 20, 28, 0.55), rgba(31, 79, 82, 0.35)),
    url("../img/hero.jpg") center / cover;
  display: grid;
  gap: 1.5rem;
  align-items: end;
  grid-template-columns: 1.4fr auto;
}

.cta-band h2 {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  max-width: 14ch;
}

/* Footer */
.site-footer {
  border-top: var(--line);
  padding: 2.5rem var(--gutter) 2rem;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2rem;
  font-size: 0.92rem;
  color: var(--plaster);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--bone);
}

.foot-mark .logo-oh {
  font-size: 1.4rem;
}

.social {
  display: flex;
  gap: 1rem;
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.copy {
  grid-column: 1 / -1;
  border-top: var(--line);
  padding-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--plaster) 70%, var(--iron));
}

/* Page heroes (inner) */
.page-hero {
  position: relative;
  min-height: 62vh;
  padding: 5rem var(--gutter) 3rem;
  overflow: hidden;
  display: grid;
  align-content: end;
  gap: 1rem;
}

.page-hero .bg {
  position: absolute;
  inset: -8%;
  background-size: cover;
  background-position: center;
  z-index: -1;
  will-change: transform;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(12, 20, 28, 0.25), var(--ink) 92%);
  z-index: -1;
}

.page-hero h1 {
  font-size: clamp(3rem, 8vw, 6.5rem);
  max-width: 14ch;
}

/* Method chambers */
.chamber {
  min-height: 100svh;
  padding: clamp(4rem, 10vw, 8rem) var(--gutter);
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  position: relative;
  overflow: hidden;
  border-top: var(--line);
}

.chamber .media {
  position: relative;
  min-height: 28rem;
}

.chamber .media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  clip-path: polygon(6% 0, 100% 0, 94% 100%, 0 100%);
  transition: filter 0.8s var(--ease-expo), transform 0.8s var(--ease-expo);
}

.chamber .copy h2 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  margin: 0.3rem 0 1rem;
}

.chamber.is-focus .media img {
  filter: saturate(1.05) contrast(1.04);
  transform: scale(1.02);
}

.apply {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.apply div {
  border-left: 2px solid var(--accent, var(--copper));
  padding-left: 0.9rem;
}

.apply strong {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.2rem;
  color: var(--accent, var(--copper));
}

.octa-diagram {
  padding: clamp(4rem, 8vw, 7rem) var(--gutter);
  text-align: center;
}

.octa-diagram img {
  width: min(520px, 80vw);
  margin: 2rem auto;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.45));
}

.facet-legend {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
  max-width: 70rem;
  margin: 0 auto;
  text-align: left;
}

.facet-legend li {
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.7rem;
  border-top: 1px solid color-mix(in srgb, var(--plaster) 18%, transparent);
}

/* Values as rooms */
.value-rooms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.value-room {
  min-height: 18rem;
  padding: 1.4rem;
  border: 1px solid color-mix(in srgb, var(--plaster) 16%, transparent);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
}

.value-room:nth-child(1) {
  background: linear-gradient(180deg, transparent, rgba(12, 20, 28, 0.75)), url("../img/tex-plaster.jpg") center / cover;
  grid-column: span 2;
}

.value-room:nth-child(2) {
  background: linear-gradient(180deg, transparent, rgba(12, 20, 28, 0.8)), url("../img/tex-copper.jpg") center / cover;
}

.value-room:nth-child(3) {
  background: linear-gradient(180deg, transparent, rgba(12, 20, 28, 0.78)), url("../img/studio-life.jpg") center / cover;
}

.value-room:nth-child(4) {
  background: linear-gradient(180deg, transparent, rgba(12, 20, 28, 0.78)), url("../img/tex-stone.jpg") center / cover;
}

.value-room:nth-child(5) {
  background: linear-gradient(180deg, transparent, rgba(12, 20, 28, 0.8)), url("../img/tex-linen.jpg") center / cover;
  grid-column: span 2;
}

.value-room h3 {
  font-size: 2rem;
}

/* Portfolio */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 2rem;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.55rem 0.9rem;
  border: 1px solid color-mix(in srgb, var(--plaster) 22%, transparent);
  color: var(--plaster);
}

.filter-btn[aria-pressed="true"],
.filter-btn:hover,
.filter-btn:focus-visible {
  border-color: var(--copper);
  color: var(--bone);
  background: color-mix(in srgb, var(--copper) 18%, transparent);
}

.project-mosaic {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 0.65rem;
}

.project-card {
  position: relative;
  min-height: 18rem;
  overflow: hidden;
  cursor: pointer;
  border: 0;
  text-align: left;
  padding: 0;
  color: inherit;
  transition: opacity 0.45s var(--ease-out);
}

.project-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transition: transform 0.8s var(--ease-expo), opacity 0.5s;
}

.project-card .shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 40%, rgba(12, 20, 28, 0.88));
}

.project-card .info {
  position: absolute;
  inset: auto 0 0 0;
  padding: 1rem 1.1rem;
}

.project-card.is-hidden {
  display: none;
}

.project-card:nth-child(1),
.project-card:nth-child(7) {
  min-height: 26rem;
  grid-row: span 2;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  display: grid;
  place-items: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s, visibility 0.4s;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox-panel {
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  background: var(--night);
  border: 1px solid color-mix(in srgb, var(--plaster) 20%, transparent);
}

.lightbox-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 20rem;
}

.lightbox-copy {
  padding: 1.6rem;
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--bone);
  border: 1px solid var(--plaster);
  padding: 0.45rem 0.7rem;
}

.packages {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.7rem;
  margin-top: 2rem;
}

.package {
  border: 1px solid color-mix(in srgb, var(--plaster) 18%, transparent);
  padding: 0;
  overflow: hidden;
  background: var(--night);
}

.package img {
  width: 100%;
  height: 14rem;
  object-fit: cover;
}

.package .body {
  padding: 1.2rem 1.3rem 1.5rem;
}

.package h3 {
  font-size: 1.8rem;
}

.package .note {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 0.5rem;
}

.package ul {
  padding-left: 1.1rem;
  color: var(--plaster);
}

/* Catalogue book */
.folio-stage {
  perspective: 1600px;
  min-height: 70vh;
  display: grid;
  place-items: center;
  padding: 2rem var(--gutter) 4rem;
}

.book {
  width: min(640px, 90vw);
  aspect-ratio: 3 / 4;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.9s var(--ease-expo);
  cursor: pointer;
}

.book.is-open {
  transform: rotateY(-18deg) translateX(8%);
}

.book-cover,
.book-page {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  background-size: cover;
  background-position: center;
  border: 1px solid color-mix(in srgb, var(--plaster) 25%, transparent);
}

.book-cover {
  background-image:
    linear-gradient(180deg, rgba(12, 20, 28, 0.15), rgba(12, 20, 28, 0.55)),
    url("../img/catalogue-cover.jpg");
  transform-origin: left center;
  transition: transform 0.9s var(--ease-expo);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
}

.book.is-open .book-cover {
  transform: rotateY(-148deg);
}

.book-page {
  background: var(--bone);
  color: var(--ink);
  padding: 2rem;
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translate(-50%, 120%);
  background: var(--night);
  border: 1px solid var(--copper);
  padding: 0.8rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  z-index: 90;
  transition: transform 0.5s var(--ease-expo);
}

.toast.is-on {
  transform: translate(-50%, 0);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.7rem;
}

.contact-panel {
  min-height: 16rem;
  padding: 1.5rem;
  border: 1px solid color-mix(in srgb, var(--plaster) 18%, transparent);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transform: rotateX(6deg);
  transform-style: preserve-3d;
  transition: transform 0.5s var(--ease-expo);
}

.contact-panel:hover,
.contact-panel:focus-within {
  transform: rotateX(0) translateY(-6px);
}

.contact-panel:nth-child(1) {
  background: linear-gradient(180deg, transparent, rgba(12, 20, 28, 0.75)), url("../img/bosphorus.jpg") center / cover;
}

.contact-panel:nth-child(2) {
  background: var(--night);
}

.contact-panel:nth-child(3) {
  background: linear-gradient(180deg, transparent 30%, var(--night)), url("../img/tex-copper.jpg") center / cover;
}

.contact-panel a {
  font-size: 1.35rem;
  font-family: var(--font-display);
}

.form {
  display: grid;
  gap: 0.9rem;
  max-width: 36rem;
}

.form label {
  display: grid;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--plaster);
}

.form input,
.form textarea,
.form select {
  background: color-mix(in srgb, var(--night) 80%, transparent);
  border: 1px solid color-mix(in srgb, var(--plaster) 22%, transparent);
  padding: 0.75rem 0.85rem;
  color: var(--bone);
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  border-color: var(--brass);
  outline: none;
}

.form .error {
  color: var(--signal);
  font-family: var(--font-body);
  font-size: 0.85rem;
  letter-spacing: 0;
  text-transform: none;
}

.form-success {
  display: none;
  padding: 2rem;
  border: 1px solid var(--teal);
  background: color-mix(in srgb, var(--teal) 18%, var(--ink));
}

.form.is-ok {
  display: none;
}

.form.is-ok + .form-success {
  display: block;
}

.map-graphic {
  margin-top: 2rem;
  min-height: 22rem;
  background: url("../img/bosphorus.jpg") center / cover;
  position: relative;
  clip-path: polygon(0 8%, 100% 0, 100% 92%, 0 100%);
}

.map-graphic .pin {
  position: absolute;
  left: 58%;
  top: 46%;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--ink);
  border: 1px solid var(--copper);
  padding: 0.45rem 0.6rem;
}

/* Folio / lookbook */
body[data-page="folio"] {
  background: var(--bone);
  color: var(--ink);
}

body[data-page="folio"] .site-header,
body[data-page="folio"] .site-footer,
body[data-page="folio"] .dim-hud {
  background: var(--bone);
  color: var(--ink);
  border-color: color-mix(in srgb, var(--ink) 15%, transparent);
}

body[data-page="folio"] .nav-desktop a,
body[data-page="folio"] .logo-concepts {
  color: var(--iron);
}

body[data-page="folio"] .grain {
  display: none;
}

body[data-page="folio"] .btn {
  color: var(--ink);
  border-color: var(--copper);
}

body[data-page="folio"] .menu-toggle {
  color: var(--ink);
  border-color: var(--copper);
}

body[data-page="folio"] .menu-toggle span,
body[data-page="folio"] .menu-toggle span::before,
body[data-page="folio"] .menu-toggle span::after {
  background: var(--ink);
}

.lookbook {
  padding: 3rem var(--gutter) 5rem;
}

.look-spread {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin: 2.5rem 0;
  page-break-inside: avoid;
}

.look-spread img {
  width: 100%;
  height: 22rem;
  object-fit: cover;
}

.caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  margin-top: 0.4rem;
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translate3d(0, 28px, -24px) scale(0.98);
  filter: blur(6px);
  animation: none;
}

.reveal.is-in {
  animation: rise 0.9s var(--ease-expo) forwards;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
    filter: none;
  }
}

.stagger > * {
  opacity: 0;
  transform: translate3d(0, 20px, -30px);
}

.stagger.is-in > * {
  animation: rise 0.85s var(--ease-expo) forwards;
}

.stagger.is-in > *:nth-child(1) {
  animation-delay: 0.02s;
}
.stagger.is-in > *:nth-child(2) {
  animation-delay: 0.1s;
}
.stagger.is-in > *:nth-child(3) {
  animation-delay: 0.18s;
}
.stagger.is-in > *:nth-child(4) {
  animation-delay: 0.26s;
}
.stagger.is-in > *:nth-child(5) {
  animation-delay: 0.34s;
}
.stagger.is-in > *:nth-child(6) {
  animation-delay: 0.42s;
}
.stagger.is-in > *:nth-child(7) {
  animation-delay: 0.5s;
}
.stagger.is-in > *:nth-child(8) {
  animation-delay: 0.58s;
}

/* Skip link */
.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--copper);
  color: var(--ink);
  padding: 0.5rem 0.8rem;
  z-index: 200;
}

.skip:focus {
  top: 0.6rem;
}

/* Responsive */
@media (max-width: 980px) {
  .nav-desktop {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .split,
  .duet,
  .chamber,
  .lightbox-panel,
  .cta-band,
  .site-footer,
  .contact-grid,
  .packages,
  .look-spread,
  .facet-legend {
    grid-template-columns: 1fr;
  }

  .dim-field,
  .project-mosaic,
  .value-rooms {
    grid-template-columns: 1fr 1fr;
  }

  .dim-panel:nth-child(n) {
    grid-column: auto;
    grid-row: auto;
    min-height: 16rem;
    clip-path: none;
  }

  .dim-panel:nth-child(1),
  .project-card:nth-child(1),
  .value-room:nth-child(1),
  .value-room:nth-child(5) {
    grid-column: 1 / -1;
    min-height: 22rem;
  }

  .compass-wrap {
    position: relative;
    right: auto;
    top: auto;
    width: min(78vw, 340px);
    margin: 1rem auto 0;
    justify-self: center;
  }

  .hero {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
  }

  .hero-copy {
    padding-bottom: 2rem;
  }

  .duet-col:first-child,
  .duet-col:last-child {
    clip-path: none;
    margin: 0;
  }

  .dim-hud {
    display: none;
  }
}

@media (max-width: 640px) {
  html {
    font-size: 16px;
  }

  .dim-field,
  .project-mosaic,
  .value-rooms {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 3.1rem;
  }

  .works-strip {
    grid-auto-columns: 78vw;
  }

  .chamber .media {
    min-height: 16rem;
  }
}

@media print {
  .site-header,
  .site-footer,
  .dim-hud,
  .curtain,
  .grain,
  .btn,
  .menu-toggle {
    display: none !important;
  }

  body,
  body[data-page="folio"] {
    background: white;
    color: black;
  }

  .look-spread {
    break-inside: avoid;
  }
}

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

  .curtain-plane,
  .grain {
    display: none;
  }

  .reveal,
  .stagger > *,
  .hero-stack .layer,
  .compass,
  .page-hero .bg {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    animation: none !important;
  }

  .btn,
  .facet,
  .project-card,
  .nav-mobile,
  .lightbox {
    transition: opacity 0.3s ease, color 0.3s ease, border-color 0.3s ease;
  }
}