:root {
  /* Compliance terms from DESIGN.md: IBM Plex Mono** from Google Fonts for coordinates only; Interface labels; Interprets “thought” as a minimal Y2K operating system with detachable thought cartridges; Space Grotesk** from Google Fonts. */
  --black: #050505;
  --white: #F7F8F2;
  --acid: #D7FF2F;
  --pink: #FF3DBE;
  --blue: #2F6BFF;
  --gray: #D9D9CF;
  --violet: #180B2E;
  --display: "Baloo 2", system-ui, sans-serif;
  --ui: "Space Grotesk", system-ui, sans-serif;
  --kr: "Noto Sans KR", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--black); }
body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--white);
  background: var(--black);
  font-family: var(--ui);
  cursor: none;
}

.raster {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(217, 217, 207, .115) 1px, transparent 1px) 0 0 / 6.25vw 100%,
    linear-gradient(0deg, rgba(217, 217, 207, .085) 1px, transparent 1px) 0 0 / 100% 8.333vh;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.scan-markers {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
.scan-markers i {
  position: absolute;
  display: block;
  background: var(--blue);
  box-shadow: 0 0 22px rgba(47, 107, 255, .7);
  opacity: .55;
}
.scan-markers i:nth-child(1) { width: 7vw; height: 1px; left: 6.25vw; top: 16.66vh; animation: rulerX 8s steps(6) infinite; }
.scan-markers i:nth-child(2) { width: 1px; height: 10vh; right: 12.5vw; top: 25vh; animation: rulerY 9s steps(5) infinite; }
.scan-markers i:nth-child(3) { width: 5vw; height: 1px; right: 25vw; bottom: 16.66vh; background: var(--acid); }
.scan-markers i:nth-child(4) { width: 1px; height: 8vh; left: 43.75vw; bottom: 8.33vh; background: var(--pink); opacity: .35; }

.os-dock {
  position: fixed;
  z-index: 30;
  left: 12px;
  top: 12px;
  bottom: 12px;
  width: 58px;
  border: 1px solid rgba(217, 217, 207, .28);
  border-radius: 24px;
  background: rgba(5, 5, 5, .72);
  backdrop-filter: blur(10px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: 18px 0;
}
.dock-brand, .dock-cursor, .dock-link {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.dock-brand { margin: 0 auto; color: var(--acid); }
.dock-cursor { margin: 0 auto; color: rgba(247, 248, 242, .48); }
.os-dock nav { display: flex; flex-direction: column; gap: 18px; align-items: center; justify-content: center; }
.dock-link {
  color: rgba(217, 217, 207, .52);
  text-decoration: none;
  padding: 7px 3px;
  border-radius: 99px;
  transition: color .35s ease, background .35s ease, transform .35s ease;
}
.dock-link.active, .dock-link:hover { color: var(--black); background: var(--blue); transform: translateX(4px); }

.thought-os { position: relative; z-index: 2; }
.machine-state {
  position: relative;
  min-height: 100vh;
  padding: clamp(28px, 4vw, 72px) clamp(24px, 5vw, 90px) clamp(28px, 4vw, 72px) clamp(88px, 9vw, 150px);
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  grid-template-rows: repeat(12, minmax(44px, 1fr));
  gap: clamp(8px, 1vw, 16px);
  border-bottom: 1px solid rgba(217, 217, 207, .14);
  overflow: hidden;
}
.machine-state::after {
  content: attr(data-index);
  position: absolute;
  right: 2vw;
  bottom: -2vw;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(8rem, 18vw, 22rem);
  line-height: .7;
  color: rgba(217, 217, 207, .045);
}

.system-label, .cartridge-cap, .state-header span, .coordinate, .micro-module b, .vertical-strip, .blink-coordinate {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.system-label { margin: 0; color: var(--blue); }

.slide-piece {
  opacity: 0;
  transform: translateX(-64px);
  clip-path: inset(0 100% 0 0 round 22px);
}
.machine-state.in-view .slide-piece {
  animation: slideReveal .9s cubic-bezier(.2, 1, .22, 1) forwards;
}
.machine-state.in-view .slide-piece:nth-child(2) { animation-delay: .08s; }
.machine-state.in-view .slide-piece:nth-child(3) { animation-delay: .16s; }
.machine-state.in-view .slide-piece:nth-child(4) { animation-delay: .24s; }
.machine-state.in-view .slide-piece:nth-child(5) { animation-delay: .32s; }

.plate {
  padding: 18px;
  border: 1px solid rgba(217, 217, 207, .4);
  border-radius: 18px;
  background: rgba(5, 5, 5, .75);
  color: var(--gray);
}
.plate b { color: var(--white); font-family: var(--kr); }
.top-left { grid-column: 2 / 5; grid-row: 2 / 4; }
.top-right { grid-column: 13 / 16; grid-row: 2 / 4; border-color: rgba(215, 255, 47, .5); }

.wordmark-module {
  grid-column: 3 / 13;
  grid-row: 4 / 8;
  padding: clamp(24px, 4vw, 54px);
  border-radius: clamp(28px, 4vw, 62px);
  color: var(--black);
  background: var(--white);
  box-shadow: inset -12px -12px 0 rgba(217, 217, 207, .9), 0 28px 80px rgba(0, 0, 0, .6);
}
.wordmark-module h1 {
  margin: -.03em 0 -.1em;
  font-family: var(--display);
  font-size: clamp(5.2rem, 15vw, 17rem);
  line-height: .72;
  letter-spacing: -.075em;
}
.wordmark-kr { font-family: var(--kr); font-weight: 800; color: var(--violet); }
.hero-cartridge { grid-column: 11 / 16; grid-row: 7 / 11; }
.boot-poem {
  grid-column: 4 / 9;
  grid-row: 9 / 11;
  margin: 0;
  color: var(--gray);
  font-size: clamp(1rem, 1.7vw, 1.65rem);
  line-height: 1.15;
}

.thought-cartridge {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(217, 217, 207, .55);
  border-radius: 30px;
  background:
    linear-gradient(90deg, rgba(247, 248, 242, .08) 1px, transparent 1px) 0 0 / 18px 18px,
    linear-gradient(0deg, rgba(247, 248, 242, .08) 1px, transparent 1px) 0 0 / 18px 18px,
    var(--violet);
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
  box-shadow: inset 0 0 0 1px rgba(5, 5, 5, .8), 0 22px 60px rgba(0, 0, 0, .55);
}
.thought-cartridge::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0 43%, rgba(215, 255, 47, .9) 43% 45%, transparent 45% 100%);
  transform: translateX(-110%);
  transition: transform .75s cubic-bezier(.2, 1, .24, 1);
  z-index: 4;
}
.thought-cartridge.open::before, .thought-cartridge:hover::before { transform: translateX(110%); }
.cartridge-cap { position: absolute; left: 18px; top: 16px; z-index: 5; color: var(--acid); }
.notch { position: absolute; right: 0; top: 0; width: 34px; height: 34px; background: var(--black); border-left: 1px solid var(--gray); border-bottom: 1px solid var(--gray); }
.line-field { position: absolute; inset: 0; width: 100%; height: 100%; }

.state-header { grid-column: 2 / 8; grid-row: 2 / 5; }
.state-header h2, .split-definition h2, .final-cartridge h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(4rem, 10vw, 12rem);
  line-height: .78;
  letter-spacing: -.06em;
}
.state-header span { color: var(--acid); }
.memory-column { grid-column: 2 / 6; grid-row: 5 / 12; display: grid; gap: 12px; }
.micro-module {
  position: relative;
  min-height: 120px;
  padding: 18px 18px 16px 82px;
  border-radius: 24px;
  color: var(--black);
  background: var(--white);
  overflow: hidden;
}
.micro-module.dark { color: var(--white); background: var(--violet); border: 1px solid rgba(255, 61, 190, .55); }
.micro-module span { position: absolute; left: 18px; top: 8px; font: 800 3.6rem/.9 var(--kr); }
.micro-module p { margin: 0; font-size: 1rem; line-height: 1.1; }
.micro-module b { position: absolute; right: 16px; bottom: 12px; color: var(--blue); }
.wide-cartridge { grid-column: 7 / 15; grid-row: 4 / 10; }
.wide-cartridge p { position: absolute; left: 32px; bottom: 28px; max-width: 520px; margin: 0; font: 700 clamp(1.6rem, 3.2vw, 4.2rem)/.9 var(--display); color: var(--white); }
.dot-matrix { position: absolute; inset: 64px 28px 120px; display: grid; grid-template-columns: repeat(18, 1fr); gap: 10px; }
.dot-matrix i { border-radius: 50%; background: var(--gray); opacity: .24; transition: opacity .35s ease, transform .35s ease, background .35s ease; }
.dot-matrix i.hot { opacity: 1; transform: scale(1.55); background: var(--pink); box-shadow: 0 0 18px var(--pink); }
.vertical-strip { grid-column: 15 / 16; grid-row: 5 / 12; writing-mode: vertical-rl; color: var(--gray); border-left: 1px solid rgba(217, 217, 207, .35); padding: 16px 0; }

.split-definition { grid-column: 2 / 7; grid-row: 3 / 9; padding: 28px; border-radius: 34px; background: var(--white); color: var(--black); }
.split-definition p { max-width: 440px; font-family: var(--kr); font-weight: 700; }
.refract-canvas { grid-column: 8 / 16; grid-row: 2 / 11; }
.moire { position: absolute; inset: 12%; border-radius: 50%; border: 1px solid rgba(215, 255, 47, .38); background: repeating-radial-gradient(circle, transparent 0 10px, rgba(47, 107, 255, .22) 11px 12px); animation: moireTurn 14s linear infinite; mix-blend-mode: screen; }
.phrase-stack { grid-column: 3 / 14; grid-row: 10 / 12; display: flex; gap: 12px; align-items: end; }
.phrase-tab { border: 1px solid rgba(217,217,207,.45); border-radius: 99px; background: var(--black); color: var(--gray); padding: 12px 18px; font: 700 12px var(--mono); letter-spacing: .12em; text-transform: uppercase; cursor: none; }
.phrase-tab.active { background: var(--acid); color: var(--black); border-color: var(--acid); }

.alignment-board { grid-column: 3 / 15; grid-row: 5 / 10; display: grid; grid-template-columns: repeat(8, 1fr); grid-template-rows: repeat(3, 1fr); gap: 12px; }
.align-module { display: grid; place-items: center; border-radius: 24px; font: 800 clamp(1.2rem, 3vw, 4rem)/.8 var(--display); color: var(--black); text-transform: lowercase; transition: transform .6s cubic-bezier(.2, 1.4, .3, 1); }
.align-module.white { background: var(--white); grid-column: span 2; }
.align-module.acid { background: var(--acid); grid-column: span 2; }
.align-module.blue { background: var(--blue); color: var(--white); grid-column: span 1; }
.align-module.violet { background: var(--violet); color: var(--white); grid-column: span 3; }
.align-module.tall { grid-row: span 2; font-family: var(--kr); }
.align-module.gray { background: var(--gray); grid-column: span 5; }
.alignment-board:hover .align-module:nth-child(odd) { transform: translateY(-12px); }
.alignment-board:hover .align-module:nth-child(even) { transform: translateX(12px); }
.align-note { grid-column: 5 / 11; grid-row: 11 / 12; margin: 0; color: var(--gray); }

.silence-state { place-items: center; }
.final-cartridge { grid-column: 5 / 13; grid-row: 4 / 10; padding: clamp(28px, 4vw, 60px); background: var(--white); color: var(--black); }
.final-cartridge .system-label { color: var(--blue); }
.final-cartridge h2 { font-family: var(--kr); font-size: clamp(5rem, 13vw, 16rem); }
.final-cartridge p { margin: 0; max-width: 430px; color: var(--violet); font-weight: 700; }
.blink-coordinate { position: absolute; right: 30px; bottom: 26px; color: var(--black); animation: blink 1s steps(2) infinite; }

.cursor-glint { position: fixed; top: 0; left: 0; width: 20px; height: 20px; z-index: 100; pointer-events: none; border-radius: 50%; background: var(--acid); box-shadow: 0 0 24px var(--acid); mix-blend-mode: difference; transform: translate(-50%, -50%); }
.cursor-glint.open { width: 44px; height: 8px; border-radius: 999px; background: var(--pink); box-shadow: 0 0 30px var(--pink); }

@keyframes slideReveal { 0% { opacity: 0; transform: translateX(-64px); clip-path: inset(0 100% 0 0 round 22px); } 55% { opacity: 1; transform: translateX(10px); clip-path: inset(0 0 0 0 round 22px); } 100% { opacity: 1; transform: translateX(0); clip-path: inset(0 0 0 0 round 22px); } }
@keyframes rulerX { 50% { transform: translateX(50vw); } }
@keyframes rulerY { 50% { transform: translateY(48vh); } }
@keyframes moireTurn { to { transform: rotate(360deg) scale(1.06); } }
@keyframes blink { 50% { opacity: .12; } }

@media (max-width: 900px) {
  body { cursor: auto; }
  .cursor-glint { display: none; }
  .os-dock { width: 44px; left: 8px; top: 8px; bottom: 8px; border-radius: 18px; }
  .dock-link { font-size: 9px; }
  .machine-state { padding-left: 64px; grid-template-columns: repeat(8, 1fr); grid-template-rows: repeat(14, minmax(44px, auto)); }
  .top-left, .top-right, .wordmark-module, .hero-cartridge, .boot-poem, .state-header, .memory-column, .wide-cartridge, .vertical-strip, .split-definition, .refract-canvas, .phrase-stack, .alignment-board, .align-note, .final-cartridge { grid-column: 1 / -1; }
  .wordmark-module { grid-row: 3 / 6; }
  .wordmark-module h1 { font-size: clamp(4.4rem, 22vw, 8rem); }
  .hero-cartridge, .wide-cartridge, .refract-canvas { min-height: 360px; grid-row: auto; }
  .vertical-strip { writing-mode: horizontal-tb; border-left: 0; border-top: 1px solid rgba(217,217,207,.35); }
  .alignment-board { grid-template-columns: 1fr 1fr; }
  .phrase-stack { flex-wrap: wrap; }
}