:root {
  /* DESIGN font tokens: IBM Plex Mono** sparingly slugs */
  --paper: #F7F4EC;
  --sumi: #11110F;
  --wet: #343430;
  --mist: #A8A59C;
  --shadow: #DDD8CC;
  --vermilion: #E34225;
  --wash: #C9CED0;
  --display: "Oswald", "Arial Narrow", Impact, sans-serif;
  --body: "Noto Sans JP", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--sumi);
  background: var(--paper);
  font-family: var(--body);
  cursor: crosshair;
  overflow-x: hidden;
}

.paper-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(52,52,48,.08), transparent 22%),
    radial-gradient(circle at 84% 7%, rgba(201,206,208,.35), transparent 20%),
    linear-gradient(90deg, rgba(17,17,15,.025) 1px, transparent 1px),
    linear-gradient(0deg, rgba(17,17,15,.018) 1px, transparent 1px);
  background-size: auto, auto, 38px 38px, 38px 38px;
  mix-blend-mode: multiply;
}

.folio { position: relative; z-index: 1; }

.spread {
  min-height: 100vh;
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(10px, 1.4vw, 24px);
  padding: clamp(28px, 5vw, 78px);
  border-bottom: 1px solid rgba(17,17,15,.16);
  overflow: hidden;
}

.spread::after {
  content: attr(data-page);
  position: absolute;
  right: clamp(22px, 3vw, 48px);
  bottom: clamp(20px, 3vw, 44px);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mist);
}

.folio-nav {
  position: fixed;
  z-index: 10;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  writing-mode: vertical-rl;
}

.folio-nav a {
  color: var(--wet);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .12em;
  transition: color .25s ease, transform .25s ease;
}

.folio-nav a:hover { color: var(--vermilion); transform: translateX(-3px); }

.ink-follower {
  position: fixed;
  left: 0;
  top: 0;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  transform: translate3d(-50%, -50%, 0);
  pointer-events: none;
  z-index: 8;
  opacity: .78;
  background: radial-gradient(circle, rgba(227,66,37,.22) 0 4%, rgba(52,52,48,.18) 6%, rgba(201,206,208,.34) 30%, rgba(247,244,236,0) 68%);
  filter: blur(5px) contrast(1.08);
  mix-blend-mode: multiply;
  transition: width .28s ease, height .28s ease, border-radius .28s ease;
}

.ink-follower span {
  position: absolute;
  inset: 34%;
  border: 1px solid rgba(17,17,15,.18);
  transform: rotate(0deg);
  transition: transform .25s ease, border-radius .25s ease;
}

.ink-follower.corner { border-radius: 12%; width: 145px; height: 145px; }
.ink-follower.corner span { border-top: 0; border-right: 0; transform: rotate(0deg); }
.ink-follower.arc span { border-radius: 50%; border-left-color: transparent; transform: rotate(-38deg); }
.ink-follower.cross span { border-radius: 0; transform: rotate(45deg); }
.ink-follower.cross span::after { content: ""; position: absolute; inset: 0; border: inherit; transform: rotate(90deg); }

.spread-gate { align-items: center; }
.construction-lines {
  position: absolute;
  inset: 10% 13%;
  opacity: .23;
  background:
    linear-gradient(90deg, transparent 49.8%, var(--mist) 50%, transparent 50.2%),
    linear-gradient(0deg, transparent 49.8%, var(--mist) 50%, transparent 50.2%),
    repeating-linear-gradient(90deg, transparent 0 88px, rgba(17,17,15,.22) 89px, transparent 90px);
  clip-path: polygon(8% 0, 100% 9%, 92% 100%, 0 86%);
}

.masthead {
  grid-column: 1 / 4;
  align-self: stretch;
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--display);
  font-size: clamp(76px, 13vw, 196px);
  line-height: .78;
  letter-spacing: -.06em;
  display: flex;
  justify-content: center;
  text-transform: uppercase;
}

.masthead span:last-child { color: transparent; -webkit-text-stroke: 1.3px var(--sumi); }
.vertical-note { position: absolute; margin: 0; writing-mode: vertical-rl; font-family: var(--mono); font-size: 11px; letter-spacing: .16em; color: var(--wet); }
.note-left { left: 46%; top: 8%; }
.note-right { right: 7%; top: 18%; }
.page-stamp, .locator-stamp, .final-seal {
  border: 2px solid var(--vermilion);
  color: var(--vermilion);
  font-family: var(--mono);
  text-transform: uppercase;
  line-height: 1.05;
  letter-spacing: .04em;
  text-align: center;
  transform: rotate(-7deg);
}
.page-stamp { position: absolute; top: 36%; right: 24%; padding: 9px 10px; font-size: 12px; }
.gate-caption { grid-column: 8 / 10; align-self: end; max-width: 210px; font-size: 14px; line-height: 1.8; }
.mono { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--wet); }

.watercolor { position: absolute; width: 34vmin; height: 25vmin; border-radius: 43% 57% 62% 38%; background: radial-gradient(circle at 40% 42%, rgba(201,206,208,.58), rgba(52,52,48,.14) 48%, transparent 70%); filter: blur(10px); mix-blend-mode: multiply; animation: drift 9s ease-in-out infinite alternate; }
.orbit-one { right: 22%; top: 22%; }

.section-kicker { grid-column: 2 / 3; writing-mode: vertical-rl; font-family: var(--mono); color: var(--vermilion); font-size: 11px; letter-spacing: .2em; }
.section-title { grid-column: 3 / 7; margin: 0; font-family: var(--display); font-size: clamp(44px, 8vw, 128px); line-height: .86; text-transform: uppercase; letter-spacing: -.04em; }
.glyph-board { grid-column: 2 / 12; display: grid; grid-template-columns: repeat(3, 1fr); align-items: end; gap: 5vw; margin-top: 16vh; }
.glyph { position: relative; min-height: 52vh; padding: 18px; border-left: 1px solid rgba(17,17,15,.25); transition: transform .35s ease; }
.glyph:hover { transform: translateY(-12px); }
.glyph strong { display: block; font-family: var(--display); font-size: clamp(130px, 19vw, 280px); line-height: .75; letter-spacing: -.08em; }
.glyph p { max-width: 230px; line-height: 1.8; font-size: 14px; }
.bracket { width: 86px; height: 86px; border-left: 3px solid var(--sumi); border-bottom: 3px solid var(--sumi); transition: transform .25s ease; }
.glyph:hover .bracket { transform: rotate(9deg); }
.arc { position: absolute; width: 160px; height: 160px; border: 2px solid var(--mist); border-left-color: transparent; border-bottom-color: transparent; border-radius: 50%; top: 16%; left: 20%; }
.crosswash { position: absolute; width: 220px; height: 220px; top: 12%; left: 12%; background: linear-gradient(45deg, transparent 43%, rgba(201,206,208,.5) 44% 56%, transparent 57%), linear-gradient(-45deg, transparent 43%, rgba(52,52,48,.18) 44% 56%, transparent 57%); filter: blur(4px); }
.locator-stamp { position: absolute; right: 18%; top: 17%; padding: 8px 11px; }

.spread-motion { align-items: center; }
.margin-stack { grid-column: 1 / 2; display: flex; flex-direction: column; gap: 28px; font-family: var(--mono); font-size: 12px; color: var(--mist); writing-mode: vertical-rl; }
.motion-columns { grid-column: 3 / 8; display: grid; grid-template-columns: repeat(3, minmax(120px, 1fr)); gap: clamp(28px, 5vw, 80px); align-items: start; }
.motion-columns p { font-size: 15px; line-height: 2; margin: 0; }
.motion-columns sup { color: var(--vermilion); font-family: var(--mono); }
.vertical-head { grid-column: 9 / 12; justify-self: end; writing-mode: vertical-rl; font-family: var(--display); font-size: clamp(58px, 9vw, 140px); line-height: .85; margin: 0; }
.red-locators i { position: absolute; width: 8px; height: 8px; background: var(--vermilion); transform: rotate(45deg); }
.red-locators i:nth-child(1) { left: 26%; top: 22%; }
.red-locators i:nth-child(2) { left: 44%; bottom: 21%; }
.red-locators i:nth-child(3) { right: 28%; top: 32%; }
.red-locators i:nth-child(4) { right: 15%; bottom: 26%; }

.spread-water { align-items: center; }
.section-title.narrow { grid-column: 2 / 5; writing-mode: vertical-rl; justify-self: center; }
.definition-strip { grid-column: 5 / 8; max-width: 280px; line-height: 1.9; z-index: 2; }
.wash-table { position: absolute; inset: 12% 8%; }
.wash { position: absolute; display: block; filter: blur(8px); mix-blend-mode: multiply; opacity: .76; animation: floatTab 8s ease-in-out infinite alternate; }
.wash-rect { width: 44vw; height: 13vw; left: 28%; top: 24%; background: rgba(201,206,208,.52); transform: rotate(-8deg); }
.wash-circle { width: 26vw; height: 26vw; border-radius: 50%; left: 48%; top: 34%; background: radial-gradient(circle, rgba(221,216,204,.7), rgba(52,52,48,.12), transparent 70%); animation-delay: -2s; }
.wash-square { width: 18vw; height: 18vw; right: 12%; top: 12%; background: rgba(168,165,156,.22); transform: rotate(12deg); animation-delay: -4s; }
.wash-x { width: 34vw; height: 34vw; left: 10%; bottom: 6%; background: linear-gradient(45deg, transparent 45%, rgba(17,17,15,.13) 46% 54%, transparent 55%), linear-gradient(-45deg, transparent 45%, rgba(201,206,208,.5) 46% 54%, transparent 55%); }
.tiny-indexes { grid-column: 9 / 11; display: flex; flex-direction: column; gap: 16px; font-family: var(--mono); color: var(--vermilion); font-size: 11px; }

.spread-living { place-items: center; text-align: center; }
.final-composition { grid-column: 3 / 11; position: relative; z-index: 2; }
.final-composition h2 { margin: 3vh 0; font-family: var(--display); font-size: clamp(90px, 18vw, 260px); line-height: .75; letter-spacing: -.07em; }
.final-composition h2 span:last-child { display: block; color: transparent; -webkit-text-stroke: 1.2px var(--sumi); }
.final-seal { width: 86px; height: 86px; display: grid; place-items: center; margin: 0 auto; font-size: 12px; border-radius: 4px; }
.closing-line { font-size: clamp(18px, 3vw, 36px); margin-top: 5vh; letter-spacing: .05em; }
.seal-geometry i { position: absolute; border: 1px solid rgba(17,17,15,.22); }
.seal-geometry i:nth-child(1) { width: 38vw; height: 1px; left: 8%; top: 50%; }
.seal-geometry i:nth-child(2) { width: 20vw; height: 20vw; right: 14%; top: 21%; transform: rotate(45deg); }
.seal-geometry i:nth-child(3) { width: 26vw; height: 26vw; border-radius: 50%; left: 20%; bottom: 12%; border-color: rgba(227,66,37,.28); }

.stamp-layer { position: fixed; inset: 0; pointer-events: none; z-index: 9; }
.tap-stamp { position: absolute; color: var(--vermilion); border: 2px solid var(--vermilion); font-family: var(--mono); font-size: 11px; padding: 7px 8px; text-transform: uppercase; animation: stampFade 1.8s ease forwards; transform: translate(-50%, -50%) rotate(-8deg); }

@keyframes drift { from { transform: translate3d(0,0,0) rotate(-8deg); } to { transform: translate3d(24px, -18px, 0) rotate(7deg); } }
@keyframes floatTab { from { translate: 0 0; } to { translate: 18px -24px; } }
@keyframes stampFade { 0% { opacity: 0; scale: 1.4; } 18% { opacity: 1; scale: 1; } 100% { opacity: 0; scale: .86; } }

@media (max-width: 860px) {
  .spread { grid-template-columns: repeat(6, 1fr); padding: 28px; }
  .folio-nav { display: none; }
  .masthead, .section-title, .section-title.narrow, .vertical-head { grid-column: 1 / -1; writing-mode: horizontal-tb; }
  .gate-caption, .glyph-board, .motion-columns, .definition-strip, .tiny-indexes, .final-composition { grid-column: 1 / -1; }
  .glyph-board, .motion-columns { grid-template-columns: 1fr; margin-top: 4vh; }
  .glyph { min-height: auto; }
  .vertical-note { display: none; }
}