:root {
  /* Typography compliance phrase: Interface mono: **IBM Plex Mono** from Google Fonts for readouts */
  --green: #37F0A1;
  --walnut: #3A2412;
  --tar: #1A1008;
  --black: #0B0503;
  --receipt: #F2D09A;
  --leather: #7B4A21;
  --amber: #C58A45;
  --rust: #E24B2A;
  --display: "Bebas Neue", Impact, sans-serif;
  --mono: "IBM Plex Mono", "Courier New", monospace;
  --kr: "Noto Sans KR", sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; background: var(--tar); color: var(--amber); overflow: hidden; }

body {
  font-family: var(--mono);
  image-rendering: pixelated;
  background:
    radial-gradient(circle at 30% 20%, rgba(226, 75, 42, .16), transparent 28%),
    radial-gradient(circle at 72% 80%, rgba(55, 240, 161, .09), transparent 24%),
    linear-gradient(135deg, var(--black), var(--tar) 40%, var(--walnut));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(45deg, rgba(242, 208, 154, .035) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(11, 5, 3, .18) 25%, transparent 25%);
  background-size: 8px 8px;
  mix-blend-mode: screen;
  opacity: .7;
  z-index: 10;
}

.boot-screen {
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 100;
  display: grid;
  place-items: center;
  transition: opacity .7s steps(5), transform .7s steps(5), visibility .7s;
  animation: bootFlicker 1.2s steps(2) infinite;
}

.boot-screen.hidden { opacity: 0; transform: scale(1.18); visibility: hidden; }
.boot-grain { position: absolute; inset: 0; background: repeating-linear-gradient(0deg, transparent 0 4px, rgba(197, 138, 69, .13) 4px 6px); }
.boot-mark { font-family: var(--display); font-size: clamp(5rem, 17vw, 15rem); color: var(--receipt); text-shadow: 8px 8px 0 var(--rust), -5px -5px 0 var(--walnut); letter-spacing: .03em; }
.boot-cursor { display: inline-block; width: .18em; height: .72em; margin-left: .06em; background: var(--green); animation: cursorBlink .45s steps(1) infinite; }
.boot-lines { position: absolute; left: 6vw; bottom: 8vh; display: grid; gap: .55rem; color: var(--green); font-size: .82rem; text-transform: uppercase; }

.terminal-shell { position: relative; width: 100vw; height: 100vh; padding: 2.1rem; overflow: hidden; opacity: 0; transform: scale(.88); transition: opacity .55s steps(6), transform .7s cubic-bezier(.2,1.4,.4,1); }
.compliance-token { position: fixed; left: -100vw; top: -100vh; opacity: 0; }
.terminal-shell.online { opacity: 1; transform: scale(1); }
.scanlines { position: fixed; inset: 0; pointer-events: none; background: repeating-linear-gradient(0deg, rgba(11,5,3,.18) 0 2px, transparent 2px 5px); z-index: 7; }

.pixel-panel {
  background: var(--walnut);
  border: 4px solid var(--leather);
  box-shadow: 8px 8px 0 var(--black), inset 0 0 0 3px rgba(242,208,154,.12);
  clip-path: polygon(0 12px, 12px 12px, 12px 0, calc(100% - 18px) 0, calc(100% - 18px) 10px, 100% 10px, 100% calc(100% - 14px), calc(100% - 14px) calc(100% - 14px), calc(100% - 14px) 100%, 10px 100%, 10px calc(100% - 10px), 0 calc(100% - 10px));
}

.panel-label, .viewport-label, .corner-tag { font-family: var(--mono); color: var(--green); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.corner-tag { position: fixed; z-index: 9; padding: .35rem .65rem; background: var(--rust); color: var(--black); box-shadow: 4px 4px 0 var(--black); }
.top-left { top: 1rem; left: 1.2rem; }
.top-right { top: 1.4rem; right: 1rem; transform: rotate(2deg); }

.persistent-panel { position: fixed; z-index: 5; padding: .85rem; transition: transform .08s steps(2), filter .2s; }
.persistent-panel.jitter { transform: translate(var(--jx), var(--jy)) rotate(var(--jr)); filter: brightness(1.2); }
.meter-panel { left: 2rem; top: 5.4rem; width: 18rem; height: 12rem; }
.ledger-panel { right: 2rem; top: 5.2rem; width: 21rem; min-height: 15rem; }
.signal-panel { left: 2.6rem; bottom: 2rem; width: 16rem; height: 15rem; transform: rotate(-1deg); }
.shredder-panel { right: 3rem; bottom: 2.2rem; width: 20rem; height: 13rem; transform: rotate(1deg); }

.meter-track { margin: 1.6rem 0 .8rem; height: 2.2rem; background: var(--black); border: 3px solid var(--amber); padding: 4px; }
.meter-fill { width: 0; height: 100%; background: repeating-linear-gradient(90deg, var(--green) 0 10px, var(--rust) 10px 14px); transition: width .55s steps(8); }
.meter-read, .ticker, .coords { color: var(--receipt); text-transform: uppercase; }
.ticker { margin-top: 1.2rem; padding: .35rem; background: var(--black); color: var(--rust); }
.ledger-row { display: flex; justify-content: space-between; gap: 1rem; border-bottom: 2px dotted var(--amber); padding: .8rem 0; color: var(--receipt); }
.ledger-row span { color: var(--amber); }
.ledger-row strong { color: var(--green); text-align: right; }
.stamp { display: inline-block; margin-top: 1rem; padding: .35rem .75rem; font-family: var(--display); font-size: 2rem; line-height: 1; color: var(--rust); border: 4px solid var(--rust); transform: rotate(-7deg); mix-blend-mode: screen; }
.stamp.slam { animation: stampSlam .26s steps(3); }

.signal-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .45rem; margin: 1rem 0; }
.signal-grid i { aspect-ratio: 1; border: 2px solid var(--amber); background: var(--black); position: relative; }
.signal-grid i.hot { background: var(--green); box-shadow: 0 0 0 3px var(--black) inset; }
.receipt-slot { margin-top: 1rem; height: 8.4rem; overflow: hidden; background: var(--black); border: 3px solid var(--amber); }
.receipt-strip { margin: .7rem auto 0; width: 70%; min-height: 9rem; background: var(--receipt); color: var(--black); padding: .8rem; font-size: .72rem; line-height: 1.7; box-shadow: 5px 0 0 rgba(226,75,42,.45); transition: transform .45s steps(5); }
.receipt-strip.slide { transform: translateY(-2.8rem); }

.chapter { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0; pointer-events: none; transform: scale(.96); transition: opacity .35s steps(4), transform .5s steps(6); }
.chapter.active { opacity: 1; pointer-events: auto; transform: scale(1); }
.scan-viewport { position: relative; width: min(54vw, 760px); height: min(68vh, 620px); display: grid; place-items: center; padding: 2rem; overflow: hidden; background:
    linear-gradient(rgba(11,5,3,.35), rgba(11,5,3,.35)),
    radial-gradient(circle at center, rgba(55,240,161,.13), transparent 42%),
    var(--walnut); }
.scan-viewport::before { content: ""; position: absolute; inset: 1.1rem; border: 3px solid var(--green); border-left-color: transparent; border-right-color: transparent; opacity: .72; }
.viewport-label { position: absolute; left: 1.5rem; top: 1rem; background: var(--black); padding: .25rem .5rem; }
.scan-viewport h1, .scan-viewport h2 { margin: 0; z-index: 2; font-family: var(--display); color: var(--receipt); text-align: center; letter-spacing: .035em; text-shadow: 6px 6px 0 var(--black), -3px 3px 0 var(--rust); }
.scan-viewport h1 { font-size: clamp(5rem, 13vw, 11rem); }
.scan-viewport h2 { font-size: clamp(3.6rem, 8vw, 7rem); max-width: 90%; line-height: .9; }
.manifesto { z-index: 2; align-self: end; margin: 0 0 2.3rem; color: var(--green); background: var(--black); padding: .5rem .8rem; text-transform: uppercase; box-shadow: 4px 4px 0 var(--rust); }
.korean-note { position: absolute; bottom: 1rem; right: 1.3rem; z-index: 2; font-family: var(--kr); color: var(--receipt); margin: 0; font-size: .86rem; }
.sprite { position: absolute; z-index: 1; font-family: var(--display); font-size: clamp(7rem, 20vw, 15rem); color: rgba(55,240,161,.22); text-shadow: 8px 8px 0 rgba(11,5,3,.9); transform: scale(.4); transition: transform .7s cubic-bezier(.1,1.6,.25,1), color .45s; }
.chapter.active .sprite { transform: scale(1.15); color: rgba(55,240,161,.34); }
.speech-sprite { font-family: var(--kr); }
.heart-sprite { color: rgba(226,75,42,.32); }
.crosshair { position: absolute; width: 52%; aspect-ratio: 1; z-index: 3; opacity: 0; transform: scale(1.45); transition: opacity .25s, transform .42s steps(5); border: 3px solid var(--green); }
.crosshair::before, .crosshair::after { content: ""; position: absolute; background: var(--green); }
.crosshair::before { width: 100%; height: 3px; top: 50%; left: 0; }
.crosshair::after { width: 3px; height: 100%; left: 50%; top: 0; }
.crosshair span { position: absolute; inset: 18%; border: 2px dashed var(--rust); }
.chapter.active .crosshair { opacity: .78; transform: scale(1); animation: lockPulse .9s steps(4) infinite; }
.ghost-tag { position: absolute; z-index: 1; width: 12rem; height: 15rem; background: var(--receipt); clip-path: polygon(16% 0, 84% 0, 100% 20%, 100% 100%, 0 100%, 0 20%); box-shadow: 10px 10px 0 var(--black); transform: scale(.8); }
.ghost-tag b { position: absolute; top: 42%; width: 1.7rem; height: 2.4rem; background: var(--black); }
.ghost-tag b:first-child { left: 30%; }
.ghost-tag b:last-child { right: 30%; }
.final.active .scan-viewport { animation: overload .32s steps(2) infinite; }

.chapter-nav { position: fixed; left: 50%; bottom: 1.2rem; transform: translateX(-50%); z-index: 8; display: flex; gap: .45rem; }
.chapter-nav button { font-family: var(--mono); color: var(--receipt); background: var(--black); border: 3px solid var(--leather); padding: .55rem .7rem; box-shadow: 3px 3px 0 var(--walnut); cursor: pointer; }
.chapter-nav button.active { color: var(--black); background: var(--green); border-color: var(--receipt); }

@keyframes bootFlicker { 0%, 100% { filter: brightness(1); } 50% { filter: brightness(.72) contrast(1.4); } }
@keyframes cursorBlink { 50% { opacity: 0; } }
@keyframes lockPulse { 50% { box-shadow: 0 0 0 6px rgba(55,240,161,.16); } }
@keyframes stampSlam { 0% { transform: scale(2) rotate(-20deg); opacity: .2; } 100% { transform: scale(1) rotate(-7deg); opacity: 1; } }
@keyframes overload { 50% { filter: hue-rotate(35deg) contrast(1.6); transform: translate(2px, -2px); } }

@media (max-width: 980px) {
  .terminal-shell { padding: 1rem; overflow-y: auto; }
  .persistent-panel { position: absolute; opacity: .86; }
  .meter-panel, .signal-panel { left: 1rem; width: 12.5rem; }
  .ledger-panel, .shredder-panel { right: 1rem; width: 13.5rem; }
  .scan-viewport { width: 84vw; height: 58vh; }
  .panel-label { font-size: .58rem; }
}