/* ==========================================================================
   DEMKU.SITE — Kinetic Paper
   Order inside experimentation.
   ========================================================================== */

:root {
  --paper: #E9E3D5;
  --warm-white: #F7F4EC;
  --ink: #171717;
  --deep-brown: #332A24;
  --signal: #E54B35;
  --blueprint: #385C78;
  --faded: #929087;

  --font-display: "DM Sans", sans-serif;
  --font-editorial: "Instrument Sans", sans-serif;
  --font-tech: "IBM Plex Mono", monospace;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  --pad-x: clamp(1.25rem, 4vw, 3.5rem);
  --max: 1400px;

  --shadow-paper:
    8px 10px 0 rgba(23, 23, 23, 0.08),
    18px 22px 35px rgba(23, 23, 23, 0.10);
  --shadow-press: 4px 5px 0 rgba(23, 23, 23, 0.18);
  --shadow-active: 1px 2px 0 rgba(23, 23, 23, 0.18);

  --paper-texture:
    radial-gradient(rgba(23, 23, 23, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.25), rgba(0, 0, 0, 0.025));
}

/* Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-editorial);
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--ink);
  background-color: var(--paper);
  background-image: var(--paper-texture);
  background-size: 5px 5px, 100% 100%;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
}

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

.skip-link {
  position: absolute;
  left: var(--pad-x);
  top: -100%;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-tech);
  font-size: 0.75rem;
}

.skip-link:focus {
  top: 0.75rem;
}

/* Shared: Registration Marks
   ========================================================================== */

.reg-mark {
  position: relative;
  display: inline-block;
  width: 10px;
  height: 10px;
  flex-shrink: 0;
}

.reg-mark::before,
.reg-mark::after {
  content: "";
  position: absolute;
  background: var(--signal);
}

.reg-mark::before {
  left: 50%;
  top: 0;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

.reg-mark::after {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

.reg-mark--lg {
  width: 16px;
  height: 16px;
}

.reg-circle {
  position: absolute;
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--signal);
  border-radius: 50%;
  z-index: 5;
  pointer-events: none;
}

.reg-circle::before,
.reg-circle::after {
  content: "";
  position: absolute;
  background: var(--signal);
}

.reg-circle::before {
  left: 50%;
  top: -6px;
  bottom: -6px;
  width: 1px;
  transform: translateX(-50%);
}

.reg-circle::after {
  top: 50%;
  left: -6px;
  right: -6px;
  height: 1px;
  transform: translateY(-50%);
}

.reg-circle--sm {
  width: 18px;
  height: 18px;
}

/* Shared: Section Heads
   ========================================================================== */

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--ink);
}

.section-head__title {
  font-family: var(--font-tech);
  font-size: clamp(0.8rem, 1.2vw, 0.95rem);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.section-head__meta {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  color: var(--blueprint);
  letter-spacing: 0.06em;
}

/* 1. Experimental Navigation
   ========================================================================== */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--warm-white);
  border-bottom: 1px solid var(--ink);
}

.nav__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem var(--pad-x);
}

.nav__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  justify-self: start;
}

.nav__brand .reg-mark {
  align-self: center;
  margin-right: 0.15rem;
}

.nav__logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.04em;
}

.nav__tld {
  font-family: var(--font-tech);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--faded);
  transform: translateY(-0.35em);
}

.nav__edition {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-align: center;
}

.nav__index {
  justify-self: end;
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, letter-spacing 0.25s ease;
}

.nav__index:hover,
.nav__index:focus-visible {
  border-bottom-color: var(--signal);
  letter-spacing: 0.16em;
}

.nav__index .arrow {
  display: inline-block;
  transition: transform 0.25s ease;
}

.nav__index:hover .arrow {
  transform: translate(2px, -2px);
}

.nav__mobile {
  display: none;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-family: var(--font-tech);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.nav__sep {
  color: var(--faded);
}

.nav__menu {
  position: relative;
}

.nav__menu summary {
  list-style: none;
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, letter-spacing 0.2s ease;
}

.nav__menu summary::-webkit-details-marker {
  display: none;
}

.nav__menu summary:hover {
  border-bottom-color: var(--signal);
  letter-spacing: 0.12em;
}

.nav__drawer {
  position: absolute;
  right: 0;
  top: calc(100% + 0.75rem);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  min-width: 11rem;
  padding: 1rem 1.15rem;
  background: var(--warm-white);
  border: 1px solid var(--ink);
  box-shadow: var(--shadow-paper);
}

.nav__drawer a {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav__drawer a:hover {
  border-bottom-color: var(--signal);
  color: var(--signal);
}

/* 2. Kinetic Paper Hero
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: auto 1fr auto;
  gap: 0;
  padding: var(--space-lg) var(--pad-x) var(--space-md);
  overflow: hidden;
  background-color: var(--paper);
  background-image: var(--paper-texture);
  background-size: 5px 5px, 100% 100%;
}

.hero__meta {
  grid-column: 1 / 4;
  grid-row: 1;
  font-family: var(--font-tech);
  font-size: 0.68rem;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--ink);
  animation: reveal-up 0.9s ease both;
}

.hero__cutout {
  position: absolute;
  left: 8%;
  top: 18%;
  width: min(42vw, 520px);
  aspect-ratio: 4 / 5;
  background: var(--signal);
  clip-path: polygon(0 0, 100% 12%, 84% 100%, 14% 86%);
  opacity: 0.92;
  z-index: 0;
  box-shadow: 12px 16px 0 rgba(23, 23, 23, 0.12);
  animation: sheet-settle 1.2s ease both;
}

.hero__sheets {
  position: absolute;
  right: 4%;
  top: 16%;
  width: min(38vw, 420px);
  aspect-ratio: 1;
  z-index: 1;
}

.sheet {
  position: absolute;
  box-shadow: var(--shadow-paper);
  transition: transform 0.45s ease;
}

.sheet--01 {
  inset: 8% 18% 22% 8%;
  background: var(--warm-white);
  background-image:
    linear-gradient(rgba(23, 23, 23, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 23, 23, 0.06) 1px, transparent 1px);
  background-size: 18px 18px;
  animation: sheet-in-a 1.1s ease both;
}

.sheet__num {
  position: absolute;
  left: 0.75rem;
  top: 0.4rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 0.85;
  letter-spacing: -0.07em;
  color: rgba(23, 23, 23, 0.12);
}

.sheet__grid {
  position: absolute;
  inset: 0;
}

.sheet--02 {
  inset: 28% 4% 8% 32%;
  background: var(--deep-brown);
  display: grid;
  place-items: center;
  animation: sheet-in-b 1.25s ease both;
}

.sheet__word {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 2.4rem);
  letter-spacing: -0.05em;
  color: var(--paper);
  transform: rotate(-4deg);
}

.sheet--03 {
  inset: 0 32% 48% 0;
  background: var(--blueprint);
  color: rgba(247, 244, 236, 0.55);
  display: grid;
  place-items: end start;
  padding: 0.75rem;
  overflow: hidden;
  animation: sheet-in-c 1.4s ease both;
}

.sheet__diagram {
  width: 130%;
  height: 130%;
  transform: translate(-10%, 15%);
}

.hero__sheets .reg-circle {
  top: 42%;
  left: 38%;
  animation: mark-in 1.6s ease both;
}

.hero__sheets:hover .sheet--01 {
  transform: translate(-8px, -6px);
}

.hero__sheets:hover .sheet--02 {
  transform: translate(10px, 8px);
}

.hero__sheets:hover .sheet--03 {
  transform: translate(-6px, 10px);
}

.hero__title {
  grid-column: 1 / 9;
  grid-row: 2;
  align-self: end;
  z-index: 2;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(4rem, 11vw, 12rem);
  line-height: 0.82;
  letter-spacing: -0.07em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
  animation: reveal-up 1s 0.15s ease both;
}

.hero__line {
  display: block;
}

.hero__line--tilt {
  display: inline-block;
  transform: rotate(-2.5deg);
  transform-origin: left center;
  margin-left: 0.05em;
}

.hero__line--over {
  position: relative;
  display: inline-block;
  margin-top: 0.02em;
  padding: 0.05em 0.12em 0.02em;
  background: var(--deep-brown);
  color: var(--paper);
  box-shadow: 10px 12px 0 rgba(23, 23, 23, 0.1);
}

.hero__labels {
  grid-column: 10 / 13;
  grid-row: 2;
  align-self: end;
  justify-self: end;
  z-index: 2;
  font-family: var(--font-tech);
  font-size: 0.68rem;
  line-height: 1.85;
  letter-spacing: 0.08em;
  color: var(--blueprint);
  text-align: right;
  margin-bottom: var(--space-xl);
  animation: reveal-up 1s 0.3s ease both;
}

.hero__measure {
  position: absolute;
  left: var(--pad-x);
  top: 28%;
  bottom: 22%;
  width: 1px;
  z-index: 2;
}

.hero__measure-line {
  position: absolute;
  inset: 0;
  background: var(--ink);
  opacity: 0.35;
}

.hero__measure-tick {
  position: absolute;
  left: 0.55rem;
  font-family: var(--font-tech);
  font-size: 0.55rem;
  letter-spacing: 0.06em;
  color: var(--faded);
}

.hero__measure-tick:first-of-type {
  top: 0;
}

.hero__measure-tick--mid {
  top: 50%;
}

.hero__measure-tick--end {
  bottom: 0;
}

.hero__scroll {
  grid-column: 1 / -1;
  grid-row: 3;
  z-index: 2;
  justify-self: start;
  font-family: var(--font-tech);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, letter-spacing 0.25s ease;
  animation: reveal-up 1s 0.45s ease both;
}

.hero__scroll:hover {
  border-bottom-color: var(--signal);
  letter-spacing: 0.16em;
}

.hero__scroll span {
  display: inline-block;
  animation: nudge-down 1.8s ease-in-out infinite;
}

/* 3. Demku Statement
   ========================================================================== */

.statement {
  position: relative;
  padding: var(--space-3xl) var(--pad-x);
  background: var(--deep-brown);
  color: var(--paper);
  overflow: hidden;
}

.statement .reg-mark {
  position: absolute;
  top: var(--space-lg);
  left: var(--pad-x);
}

.statement .reg-mark::before,
.statement .reg-mark::after {
  background: var(--signal);
}

.statement__title {
  max-width: 12ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.2rem, 9vw, 8.5rem);
  line-height: 0.86;
  letter-spacing: -0.06em;
  text-transform: uppercase;
}

.statement__title span {
  display: block;
}

.statement__title span:nth-child(2) {
  margin-left: 0.15em;
}

.statement__title span:nth-child(3) {
  margin-left: 0.35em;
}

.statement__title span:nth-child(4) {
  color: var(--signal);
}

.statement__text {
  max-width: 34rem;
  margin-top: var(--space-xl);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.5;
  color: rgba(233, 227, 213, 0.88);
}

.statement__label {
  margin-top: var(--space-lg);
  font-family: var(--font-tech);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--blueprint);
}

/* 4. Design Coordinates
   ========================================================================== */

.coords {
  position: relative;
  padding: var(--space-3xl) var(--pad-x);
  background-color: var(--warm-white);
  background-image: var(--paper-texture);
  background-size: 5px 5px, 100% 100%;
  overflow: hidden;
}

.coords__list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
  z-index: 1;
}

.coords__rail {
  position: absolute;
  left: var(--pad-x);
  right: var(--pad-x);
  top: calc(50% + 1.5rem);
  height: 1px;
  background: var(--ink);
  opacity: 0.25;
  z-index: 0;
  pointer-events: none;
}

.coord {
  position: relative;
  border-left: 1px solid rgba(23, 23, 23, 0.25);
  min-height: 280px;
}

.coord:last-child {
  border-right: 1px solid rgba(23, 23, 23, 0.25);
}

.coord__hit {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  padding: var(--space-md) var(--space-md) var(--space-lg);
  transition: transform 0.35s ease;
}

.coord__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(4.5rem, 10vw, 8rem);
  line-height: 0.8;
  letter-spacing: -0.08em;
  transition: transform 0.35s ease, color 0.35s ease;
  transform-origin: left top;
}

.coord__name {
  margin-top: var(--space-md);
  font-family: var(--font-tech);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  position: relative;
  display: inline-block;
  width: fit-content;
}

.coord__name::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 2px;
  background: var(--signal);
  transition: width 0.35s ease;
}

.coord__desc {
  margin-top: var(--space-md);
  max-width: 16ch;
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--faded);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s ease, transform 0.35s ease, color 0.35s ease;
}

.coord__tag {
  margin-top: auto;
  padding-top: var(--space-md);
  font-family: var(--font-tech);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--faded);
  transition: color 0.35s ease;
}

.coord__hit:hover .coord__num,
.coord__hit:focus-visible .coord__num {
  transform: scale(1.06);
  color: var(--ink);
}

.coord__hit:hover .coord__name::after,
.coord__hit:focus-visible .coord__name::after {
  width: 100%;
}

.coord__hit:hover .coord__desc,
.coord__hit:focus-visible .coord__desc {
  opacity: 1;
  transform: translateY(0);
  color: var(--ink);
}

.coord__hit:hover .coord__tag,
.coord__hit:focus-visible .coord__tag {
  color: var(--blueprint);
}

/* 5. Layer Studies
   ========================================================================== */

.studies {
  padding: var(--space-3xl) var(--pad-x);
  background: var(--paper);
  background-image: var(--paper-texture);
  background-size: 5px 5px, 100% 100%;
}

.studies__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.study {
  display: grid;
  gap: var(--space-md);
}

.study__stack {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: visible;
}

.study__label {
  font-family: var(--font-tech);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--blueprint);
}

.study__title {
  margin-top: 0.35rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  letter-spacing: -0.04em;
}

.study__note {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: var(--faded);
  max-width: 28ch;
}

/* Study 01 — stacked offset sheets */
.study--01 .study__layer {
  position: absolute;
  transition: transform 0.4s ease;
}

.study--01 .study__layer--base {
  inset: 18% 8% 8% 18%;
  background: var(--warm-white);
  box-shadow: var(--shadow-paper);
}

.study--01 .study__layer--mid {
  inset: 10% 16% 16% 10%;
  background: var(--ink);
  box-shadow: 6px 8px 0 rgba(23, 23, 23, 0.08);
}

.study--01 .study__layer--top {
  inset: 0 28% 28% 0;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: var(--shadow-paper);
}

.study--01 .study__layer--top::before {
  content: "OFFSET";
  position: absolute;
  left: 0.75rem;
  bottom: 0.75rem;
  font-family: var(--font-tech);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--blueprint);
}

.study--01 .reg-mark {
  position: absolute;
  top: 22%;
  left: 42%;
  z-index: 3;
}

.study--01:hover .study__layer--base {
  transform: translate(10px, 8px);
}

.study--01:hover .study__layer--mid {
  transform: translate(-8px, 6px);
}

.study--01:hover .study__layer--top {
  transform: translate(-6px, -8px);
}

/* Study 02 — ink alignment */
.study--02 .study__stack {
  background: var(--warm-white);
  border: 1px solid rgba(23, 23, 23, 0.2);
  overflow: hidden;
}

.study--02 .study__ink {
  position: absolute;
  left: 12%;
  top: 10%;
  width: 55%;
  height: 62%;
  background: var(--ink);
  transform: translate(4px, -3px);
  transition: transform 0.4s ease;
}

.study--02 .study__ink::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--signal);
  opacity: 0.35;
  transform: translate(-7px, 5px);
  mix-blend-mode: multiply;
}

.study--02 .study__band {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18%;
  height: 1px;
  background: var(--blueprint);
}

.study--02 .study__band::before,
.study--02 .study__band::after {
  content: "";
  position: absolute;
  top: -4px;
  width: 1px;
  height: 9px;
  background: var(--blueprint);
}

.study--02 .study__band::before {
  left: 12%;
}

.study--02 .study__band::after {
  right: 18%;
}

.study--02 .study__cross {
  position: absolute;
  right: 14%;
  top: 22%;
  width: 48px;
  height: 48px;
}

.study--02 .study__cross::before,
.study--02 .study__cross::after {
  content: "";
  position: absolute;
  background: var(--signal);
}

.study--02 .study__cross::before {
  left: 50%;
  top: 0;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

.study--02 .study__cross::after {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

.study--02 .reg-circle {
  right: 12%;
  bottom: 28%;
  left: auto;
  top: auto;
}

.study--02:hover .study__ink {
  transform: translate(10px, 4px);
}

/* Study 03 — fold */
.study--03 .study__fold {
  position: absolute;
  inset: 8% 10% 12% 10%;
  background: linear-gradient(
    118deg,
    var(--warm-white) 0%,
    var(--warm-white) 49.5%,
    #d9d2c2 50%,
    var(--paper) 50.5%,
    var(--paper) 100%
  );
  box-shadow: var(--shadow-paper);
  clip-path: polygon(0 8%, 100% 0, 100% 100%, 0 92%);
  transition: transform 0.4s ease;
}

.study--03 .study__crease {
  position: absolute;
  inset: 8% 10% 12% 10%;
  background: linear-gradient(
    118deg,
    transparent 49%,
    rgba(23, 23, 23, 0.18) 50%,
    transparent 51%
  );
  clip-path: polygon(0 8%, 100% 0, 100% 100%, 0 92%);
  pointer-events: none;
}

.study--03 .study__corner {
  position: absolute;
  right: 8%;
  top: 6%;
  width: 56px;
  height: 56px;
  background: var(--deep-brown);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 70%);
  box-shadow: 6px 8px 0 rgba(23, 23, 23, 0.1);
  transition: transform 0.4s ease;
}

.study--03 .study__anno {
  position: absolute;
  left: 14%;
  bottom: 18%;
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--blueprint);
}

.study--03:hover .study__fold {
  transform: translate(-6px, 8px) rotate(-1deg);
}

.study--03:hover .study__corner {
  transform: translate(8px, -6px);
}

/* 6. Cut-Out Gallery
   ========================================================================== */

.gallery {
  padding: var(--space-3xl) var(--pad-x);
  background: var(--warm-white);
  background-image: var(--paper-texture);
  background-size: 5px 5px, 100% 100%;
  overflow: hidden;
}

.gallery__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-lg) var(--space-md);
}

.cut {
  position: relative;
  display: grid;
  gap: 0.75rem;
}

.cut figcaption {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.cut__num {
  color: var(--signal);
}

.cut__name {
  color: var(--ink);
}

.cut__shape {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  transition: transform 0.4s ease;
}

.cut--01 {
  grid-column: 1 / 5;
}

.cut--01 .cut__shape {
  background: var(--ink);
  clip-path: polygon(0 0, 100% 8%, 88% 100%, 0 90%);
  box-shadow: 10px 14px 0 rgba(23, 23, 23, 0.1);
}

.cut--01 .cut__shape::after {
  content: "A";
  position: absolute;
  right: -8%;
  bottom: 8%;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 5rem;
  letter-spacing: -0.08em;
  color: var(--paper);
  line-height: 1;
}

.cut--02 {
  grid-column: 5 / 9;
  margin-top: 4rem;
}

.cut--02 .cut__shape {
  background: var(--signal);
  clip-path: polygon(12% 0, 100% 0, 100% 86%, 0 100%);
  transform: translateX(8%);
}

.cut--02 .cut__shape::before {
  content: "";
  position: absolute;
  inset: 18% 18% 22% 22%;
  border: 1px solid rgba(247, 244, 236, 0.5);
}

.cut--03 {
  grid-column: 9 / 13;
}

.cut--03 .cut__shape {
  background: var(--blueprint);
  clip-path: polygon(0 14%, 100% 0, 86% 100%, 8% 88%);
  overflow: visible;
}

.cut--03 .cut__shape::after {
  content: "";
  position: absolute;
  right: -12%;
  top: 20%;
  width: 40%;
  height: 40%;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: var(--shadow-paper);
  transform: rotate(8deg);
}

.cut--04 {
  grid-column: 2 / 7;
  margin-top: -2rem;
}

.cut--04 .cut__shape {
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(105deg, var(--deep-brown) 0 48%, transparent 48%),
    linear-gradient(105deg, transparent 52%, var(--paper) 52%);
  background-color: var(--ink);
  border: 1px solid var(--ink);
  box-shadow: 12px 16px 28px rgba(23, 23, 23, 0.12);
  transform: rotate(-2deg);
}

.cut--04 .cut__shape::after {
  content: "OFFSET";
  position: absolute;
  left: 54%;
  top: 42%;
  font-family: var(--font-tech);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  color: var(--blueprint);
}

.cut--05 {
  grid-column: 7 / 12;
  margin-top: 1rem;
}

.cut--05 .cut__shape {
  background: var(--warm-white);
  border: 1px solid var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% 78%, 72% 100%, 0 100%);
  box-shadow: var(--shadow-paper);
}

.cut--05 .cut__shape::before {
  content: "";
  position: absolute;
  inset: 12%;
  border: 1px dashed var(--blueprint);
}

.cut--05 .cut__shape::after {
  content: "";
  position: absolute;
  left: 20%;
  top: 24%;
  width: 48%;
  height: 42%;
  background: transparent;
  border: 2px solid var(--signal);
  transform: rotate(-6deg);
}

.cut:hover .cut__shape {
  transform: translateY(-8px);
}

.cut--02:hover .cut__shape {
  transform: translateX(8%) translateY(-8px);
}

.cut--04:hover .cut__shape {
  transform: rotate(-2deg) translateY(-8px);
}

/* 7. Moving Poster
   ========================================================================== */

.poster {
  position: relative;
  padding: var(--space-3xl) var(--pad-x);
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.poster__title {
  position: relative;
  z-index: 2;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(4rem, 12vw, 11rem);
  line-height: 0.82;
  letter-spacing: -0.07em;
  text-transform: uppercase;
  margin-bottom: var(--space-xl);
}

.poster__title span {
  display: block;
}

.poster__title span:nth-child(2) {
  margin-left: 0.2em;
  color: var(--signal);
}

.poster__title span:nth-child(3) {
  margin-left: 0.45em;
}

.poster__stage {
  position: relative;
  min-height: clamp(280px, 42vw, 520px);
  margin-top: var(--space-lg);
}

.poster__sheet {
  position: absolute;
  box-shadow: var(--shadow-paper);
}

.poster__sheet--a {
  left: 0;
  top: 10%;
  width: 42%;
  height: 70%;
  background: var(--paper);
  animation: poster-shift-a 8s ease-in-out infinite;
}

.poster__sheet--b {
  left: 28%;
  top: 0;
  width: 38%;
  height: 78%;
  background: var(--blueprint);
  animation: poster-shift-b 9s ease-in-out infinite;
}

.poster__sheet--c {
  right: 4%;
  top: 18%;
  width: 34%;
  height: 68%;
  background: var(--signal);
  clip-path: polygon(0 0, 100% 10%, 90% 100%, 8% 92%);
  animation: poster-shift-c 7.5s ease-in-out infinite;
}

.poster__block {
  position: absolute;
  left: 18%;
  bottom: 8%;
  width: 22%;
  height: 28%;
  background: var(--deep-brown);
  animation: poster-shift-a 10s ease-in-out infinite reverse;
}

.poster__mark {
  position: absolute;
  left: 46%;
  top: 36%;
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--signal);
  border-radius: 50%;
  z-index: 3;
  animation: mark-pulse 4s ease-in-out infinite;
}

.poster__mark::before,
.poster__mark::after {
  content: "";
  position: absolute;
  background: var(--signal);
}

.poster__mark::before {
  left: 50%;
  top: -5px;
  bottom: -5px;
  width: 1px;
  transform: translateX(-50%);
}

.poster__mark::after {
  top: 50%;
  left: -5px;
  right: -5px;
  height: 1px;
  transform: translateY(-50%);
}

.poster__anno {
  position: absolute;
  right: 6%;
  bottom: 6%;
  font-family: var(--font-tech);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: rgba(233, 227, 213, 0.7);
  z-index: 2;
}

.poster__big {
  position: absolute;
  left: 8%;
  top: 18%;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(5rem, 14vw, 12rem);
  line-height: 0.8;
  letter-spacing: -0.08em;
  color: var(--ink);
  z-index: 2;
  mix-blend-mode: multiply;
  opacity: 0.85;
  animation: poster-shift-b 11s ease-in-out infinite;
}

/* 8. Archive
   ========================================================================== */

.archive {
  padding: var(--space-3xl) var(--pad-x);
  background: var(--paper);
  background-image: var(--paper-texture);
  background-size: 5px 5px, 100% 100%;
}

.archive__list {
  border-top: 1px solid var(--ink);
}

.archive__row {
  position: relative;
  display: grid;
  grid-template-columns: auto 1.4fr 1fr auto auto;
  align-items: center;
  gap: var(--space-md);
  padding: 1.15rem 0.5rem 1.15rem 1.5rem;
  border-bottom: 1px solid rgba(23, 23, 23, 0.2);
  font-family: var(--font-tech);
  font-size: clamp(0.75rem, 1.3vw, 0.9rem);
  letter-spacing: 0.06em;
  transition: transform 0.3s ease, background-color 0.3s ease;
}

.archive__marker {
  position: absolute;
  left: 0.35rem;
  top: 50%;
  width: 10px;
  height: 10px;
  opacity: 0;
  transform: translateY(-50%) scale(0.6);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.archive__marker::before,
.archive__marker::after {
  content: "";
  position: absolute;
  background: var(--signal);
}

.archive__marker::before {
  left: 50%;
  top: 0;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

.archive__marker::after {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

.archive__id {
  color: var(--ink);
}

.archive__tech {
  color: transparent;
  transition: color 0.3s ease;
}

.archive__xy {
  color: var(--faded);
  font-size: 0.7rem;
}

.archive__arrow {
  transition: transform 0.3s ease, color 0.3s ease;
}

.archive__row:hover,
.archive__row:focus-visible {
  transform: translateX(8px);
  background: rgba(247, 244, 236, 0.65);
}

.archive__row:hover .archive__marker,
.archive__row:focus-visible .archive__marker {
  opacity: 1;
  transform: translateY(-50%) scale(1);
}

.archive__row:hover .archive__tech,
.archive__row:focus-visible .archive__tech {
  color: var(--blueprint);
}

.archive__row:hover .archive__arrow,
.archive__row:focus-visible .archive__arrow {
  transform: translateX(6px);
  color: var(--signal);
}

/* 9. Final Fold
   ========================================================================== */

.final {
  position: relative;
  padding: var(--space-3xl) var(--pad-x);
  min-height: 90svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--paper);
  background-image: var(--paper-texture);
  background-size: 5px 5px, 100% 100%;
  overflow: hidden;
}

.final__fold {
  position: absolute;
  right: -5%;
  top: 10%;
  width: min(55vw, 640px);
  aspect-ratio: 5 / 6;
  z-index: 0;
  pointer-events: none;
}

.final__plane {
  position: absolute;
  inset: 0;
}

.final__plane--a {
  background: linear-gradient(
    135deg,
    var(--warm-white) 0%,
    var(--warm-white) 49%,
    #d8d0bf 50%,
    transparent 50%
  );
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  box-shadow: var(--shadow-paper);
}

.final__plane--b {
  background: linear-gradient(
    135deg,
    transparent 50%,
    #cfc6b4 50%,
    var(--paper) 51%,
    var(--paper) 100%
  );
  transform-origin: 50% 50%;
  filter: drop-shadow(14px 18px 28px rgba(23, 23, 23, 0.12));
}

.final__plane--b::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    transparent 49.5%,
    rgba(23, 23, 23, 0.14) 50%,
    transparent 50.5%
  );
}

.final__title {
  position: relative;
  z-index: 1;
  max-width: 10ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.5rem, 10vw, 9rem);
  line-height: 0.84;
  letter-spacing: -0.07em;
  text-transform: uppercase;
}

.final__title span {
  display: block;
}

.final__title span:nth-child(even) {
  margin-left: 0.18em;
}

.final__support {
  position: relative;
  z-index: 1;
  max-width: 28rem;
  margin-top: var(--space-lg);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--deep-brown);
}

.final__cta {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  width: fit-content;
  margin-top: var(--space-xl);
  padding: 1rem 1.4rem;
  background: var(--signal);
  color: var(--warm-white);
  font-family: var(--font-tech);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  box-shadow: var(--shadow-press);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.final__cta span {
  display: inline-block;
  transition: transform 0.25s ease;
}

.final__cta:hover {
  transform: translateY(-2px);
  box-shadow: 6px 7px 0 rgba(23, 23, 23, 0.2);
}

.final__cta:hover span {
  transform: translateX(5px);
}

.final__cta:active {
  transform: translateY(1px);
  box-shadow: var(--shadow-active);
}

/* 10. Footer
   ========================================================================== */

.footer {
  padding: var(--space-2xl) var(--pad-x) var(--space-lg);
  background: var(--ink);
  color: var(--paper);
}

.footer__top {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(233, 227, 213, 0.2);
}

.footer__logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 0.85;
  letter-spacing: -0.06em;
}

.footer__tld {
  font-family: var(--font-tech);
  font-size: 0.25em;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--faded);
  vertical-align: super;
  margin-left: 0.15em;
}

.footer__tagline {
  margin-top: var(--space-md);
  font-family: var(--font-editorial);
  font-size: 1.05rem;
  font-style: italic;
  color: rgba(233, 227, 213, 0.75);
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  align-content: start;
  padding-top: 0.5rem;
}

.footer__col h3 {
  font-family: var(--font-tech);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--faded);
  margin-bottom: var(--space-sm);
}

.footer__col ul {
  display: grid;
  gap: 0.55rem;
}

.footer__col a {
  font-family: var(--font-editorial);
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, letter-spacing 0.25s ease, color 0.25s ease;
}

.footer__col a:hover {
  border-bottom-color: var(--signal);
  letter-spacing: 0.03em;
  color: var(--signal);
}

.footer__bottom {
  padding-top: var(--space-md);
}

.footer__bottom p {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: rgba(233, 227, 213, 0.65);
}

.footer__bottom .reg-mark::before,
.footer__bottom .reg-mark::after {
  background: var(--signal);
}

/* Animations
   ========================================================================== */

@keyframes reveal-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes sheet-settle {
  from {
    opacity: 0;
    transform: translate(-20px, 24px) rotate(-3deg);
  }
  to {
    opacity: 0.92;
    transform: translate(0, 0) rotate(0);
  }
}

@keyframes sheet-in-a {
  from {
    opacity: 0;
    transform: translate(16px, 20px);
  }
  to {
    opacity: 1;
    transform: translate(0, 0);
  }
}

@keyframes sheet-in-b {
  from {
    opacity: 0;
    transform: translate(-18px, 14px);
  }
  to {
    opacity: 1;
    transform: translate(0, 0);
  }
}

@keyframes sheet-in-c {
  from {
    opacity: 0;
    transform: translate(12px, -16px);
  }
  to {
    opacity: 1;
    transform: translate(0, 0);
  }
}

@keyframes mark-in {
  from {
    opacity: 0;
    transform: scale(0.4);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes nudge-down {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(4px);
  }
}

@keyframes poster-shift-a {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(8px, -6px);
  }
}

@keyframes poster-shift-b {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-10px, 8px);
  }
}

@keyframes poster-shift-c {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(6px, 10px);
  }
}

@keyframes mark-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.7;
    transform: scale(1.08);
  }
}

/* Responsive
   ========================================================================== */

@media (max-width: 1100px) {
  .hero__title {
    grid-column: 1 / 11;
  }

  .hero__labels {
    grid-column: 1 / 7;
    grid-row: 3;
    justify-self: start;
    text-align: left;
    margin-bottom: var(--space-sm);
    align-self: start;
  }

  .hero__scroll {
    grid-row: 4;
  }

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

  .hero__sheets {
    width: min(46vw, 360px);
    top: 14%;
  }

  .coords__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .coord:nth-child(2) {
    border-right: 1px solid rgba(23, 23, 23, 0.25);
  }

  .coord:nth-child(3),
  .coord:nth-child(4) {
    border-top: 1px solid rgba(23, 23, 23, 0.25);
  }

  .coords__rail {
    display: none;
  }

  .studies__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .study__stack {
    max-width: 420px;
  }

  .cut--01,
  .cut--02,
  .cut--03,
  .cut--04,
  .cut--05 {
    grid-column: span 6;
    margin-top: 0;
  }

  .footer__top {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav__brand,
  .nav__edition,
  .nav__index {
    display: none;
  }

  .nav__mobile {
    display: flex;
  }

  .nav__inner {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: var(--space-md);
    padding-bottom: var(--space-lg);
  }

  .hero__meta {
    grid-column: 1 / -1;
  }

  .hero__measure {
    display: none;
  }

  .hero__cutout {
    left: auto;
    right: -8%;
    top: 12%;
    width: 55vw;
    opacity: 0.75;
  }

  .hero__sheets {
    position: relative;
    grid-column: 1 / -1;
    grid-row: 2;
    width: min(78vw, 320px);
    margin: var(--space-lg) 0;
    right: auto;
    top: auto;
    justify-self: end;
  }

  .hero__title {
    grid-column: 1 / -1;
    grid-row: 3;
    font-size: clamp(3.4rem, 18vw, 5.5rem);
    margin-bottom: var(--space-md);
  }

  .hero__labels {
    grid-column: 1 / -1;
    grid-row: 4;
    margin-bottom: var(--space-md);
  }

  .hero__scroll {
    grid-row: 5;
  }

  .statement,
  .coords,
  .studies,
  .gallery,
  .poster,
  .archive,
  .final {
    padding-top: var(--space-2xl);
    padding-bottom: var(--space-2xl);
  }

  .coords__list {
    grid-template-columns: 1fr;
  }

  .coord,
  .coord:last-child,
  .coord:nth-child(2) {
    border-left: none;
    border-right: none;
    border-top: 1px solid rgba(23, 23, 23, 0.25);
    min-height: auto;
  }

  .coord__desc {
    opacity: 1;
    transform: none;
    color: var(--ink);
  }

  .cut--01,
  .cut--02,
  .cut--03,
  .cut--04,
  .cut--05 {
    grid-column: 1 / -1;
  }

  .cut--02 .cut__shape {
    transform: none;
  }

  .cut--02:hover .cut__shape {
    transform: translateY(-8px);
  }

  .poster__sheet--a {
    width: 55%;
  }

  .poster__sheet--b {
    width: 48%;
    left: 32%;
  }

  .poster__sheet--c {
    width: 42%;
  }

  .poster__big {
    left: 4%;
  }

  .archive__row {
    grid-template-columns: 1fr auto;
    gap: 0.35rem 1rem;
    padding-left: 1.35rem;
  }

  .archive__tech {
    display: none;
  }

  .archive__xy {
    grid-column: 1;
    font-size: 0.65rem;
  }

  .archive__arrow {
    grid-column: 2;
    grid-row: 1 / 3;
    align-self: center;
  }

  .footer__cols {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .final__fold {
    width: 70vw;
    opacity: 0.55;
    right: -15%;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 1rem;
  }

  .hero__line--over {
    padding-right: 0.08em;
  }

  .poster__stage {
    min-height: 260px;
  }

  .archive__id {
    font-size: 0.72rem;
  }
}

/* Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}