:root {
  /* Typography compliance note: IBM Plex Sans KR** for longer Korean/English-friendly body copy so the site remains casual and personable. Large display text should be short and blocky; Space Mono** readouts. */
  --ink: #10121A;
  --milk: #F8EFD2;
  --amber: #FFB000;
  --coral: #FF5A5F;
  --brown: #4A2A18;
  --unit: 8px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 400vh;
  background: var(--ink);
  color: var(--milk);
  font-family: "IBM Plex Sans KR", sans-serif;
  overflow-x: hidden;
}

.thought-machine {
  min-height: 400vh;
  background:
    linear-gradient(90deg, rgba(248,239,210,.035) 1px, transparent 1px) 0 0 / 16px 16px,
    linear-gradient(rgba(248,239,210,.03) 1px, transparent 1px) 0 0 / 16px 16px,
    var(--ink);
}

.pixel-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  opacity: .22;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(255,176,0,.13) 3px 4px),
    radial-gradient(circle at 20% 20%, rgba(255,90,95,.2) 0 1px, transparent 1px),
    radial-gradient(circle at 80% 50%, rgba(248,239,210,.15) 0 1px, transparent 1px);
  background-size: 100% 4px, 17px 17px, 23px 23px;
  mix-blend-mode: screen;
}

.dashboard {
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-columns: 88px 1.2fr .82fr 180px;
  grid-template-rows: 88px 1fr 152px 72px;
  gap: 16px;
  padding: 24px;
  image-rendering: pixelated;
}

.panel {
  position: relative;
  border: 4px solid var(--milk);
  background: var(--ink);
  color: var(--milk);
  box-shadow: 8px 8px 0 var(--brown), 12px 12px 0 rgba(255,176,0,.35);
  clip-path: polygon(0 12px, 12px 12px, 12px 0, calc(100% - 16px) 0, calc(100% - 16px) 12px, 100% 12px, 100% calc(100% - 16px), calc(100% - 16px) calc(100% - 16px), calc(100% - 16px) 100%, 12px 100%, 12px calc(100% - 12px), 0 calc(100% - 12px));
  opacity: 0;
  transform: translateY(24px) scale(.98);
  animation: panelBoot .72s steps(5, end) forwards;
}

.panel-on:nth-of-type(2) { animation-delay: .12s; }
.panel-on:nth-of-type(3) { animation-delay: .24s; }
.panel-on:nth-of-type(4) { animation-delay: .36s; }
.panel-on:nth-of-type(5) { animation-delay: .48s; }
.panel-on:nth-of-type(6) { animation-delay: .6s; }
.panel-on:nth-of-type(7) { animation-delay: .72s; }

@keyframes panelBoot {
  0% { opacity: 0; transform: translate(16px, 32px) scale(.92); }
  55% { opacity: 1; transform: translate(-8px, -8px) scale(1.02); }
  100% { opacity: 1; transform: translate(0, 0) scale(1); }
}

.circuit-map {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.trace {
  fill: none;
  stroke: var(--amber);
  stroke-width: 6;
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  opacity: .75;
  animation: drawTrace 1.8s steps(12, end) .8s forwards;
}

.trace-two { animation-delay: 1.1s; stroke: var(--milk); opacity: .35; }
.trace-three { animation-delay: 1.35s; stroke: var(--coral); opacity: .5; }
.pad { fill: var(--amber); filter: drop-shadow(0 0 0 var(--amber)); animation: ledPulse 1.1s steps(2, end) infinite; }
.pad.coral { fill: var(--coral); }

@keyframes drawTrace { to { stroke-dashoffset: 0; } }
@keyframes ledPulse { 50% { opacity: .25; } }

.monitor { grid-column: 2 / 3; grid-row: 1 / 3; padding: 32px; z-index: 2; background: var(--milk); color: var(--ink); }
.boot-label, .camera-head, .diagnostics, .memory-cell, .state-dock button { font-family: "Space Mono", monospace; }
.boot-label { display: inline-block; background: var(--ink); color: var(--amber); padding: 8px 12px; box-shadow: 4px 4px 0 var(--coral); }
h1 {
  font-family: "Press Start 2P", system-ui;
  font-size: clamp(36px, 6.4vw, 84px);
  line-height: 1.2;
  margin: 40px 0 24px;
  color: var(--ink);
  text-shadow: 4px 4px 0 var(--amber), 8px 8px 0 rgba(255,90,95,.45);
}
.cursor { color: var(--coral); }
.cursor.off { opacity: 0; }
.monitor-copy { font-size: clamp(18px, 2.1vw, 28px); line-height: 1.48; max-width: 760px; }
.diagnostics { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.diagnostics span { background: var(--amber); color: var(--ink); padding: 8px 10px; border: 3px solid var(--ink); }

.rail { grid-column: 1; grid-row: 1 / 4; padding: 16px 10px; text-align: center; z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 18px; }
.rail p { writing-mode: vertical-rl; font-family: "Press Start 2P"; color: var(--amber); font-size: 11px; margin: 0; }
.rail b { writing-mode: vertical-rl; font-family: "Space Mono"; font-size: 13px; color: var(--milk); }
.rail-dot { width: 22px; height: 22px; background: var(--brown); border: 4px solid var(--milk); }
.rail-dot.active { background: var(--coral); animation: ledPulse .8s steps(2, end) infinite; }

.camera { grid-column: 3 / 4; grid-row: 1 / 3; padding: 16px; z-index: 2; }
.camera-head { display: flex; justify-content: space-between; color: var(--amber); margin-bottom: 12px; }
.photo-frame { position: relative; height: calc(100% - 44px); min-height: 330px; border: 4px solid var(--amber); overflow: hidden; background: var(--brown); }
.photo-scene { position: absolute; inset: 0; opacity: 0; transition: opacity .18s steps(2, end), transform .18s steps(2, end); transform: translateX(24px); }
.photo-scene.active { opacity: 1; transform: translateX(0); }
.scene-one { background:
  linear-gradient(90deg, transparent 0 40%, rgba(16,18,26,.75) 40% 45%, transparent 45%),
  repeating-linear-gradient(135deg, rgba(255,176,0,.92) 0 8px, var(--brown) 8px 16px),
  radial-gradient(circle at 72% 28%, var(--amber) 0 52px, transparent 54px), var(--ink); }
.scene-two { background:
  linear-gradient(0deg, var(--ink) 0 18%, transparent 18%),
  repeating-linear-gradient(90deg, var(--brown) 0 16px, var(--amber) 16px 24px, var(--ink) 24px 40px),
  linear-gradient(135deg, transparent 0 45%, rgba(248,239,210,.28) 45% 55%, transparent 55%); }
.scene-three { background:
  radial-gradient(circle at 30% 58%, var(--amber) 0 42px, var(--brown) 43px 66px, transparent 67px),
  linear-gradient(90deg, transparent 0 58%, var(--amber) 58% 63%, transparent 63%),
  repeating-linear-gradient(0deg, var(--ink) 0 14px, var(--brown) 14px 24px); }
.scanlines { position: absolute; inset: 0; background: repeating-linear-gradient(0deg, rgba(16,18,26,.0) 0 6px, rgba(16,18,26,.42) 6px 8px); mix-blend-mode: multiply; }
.caption { font-family: "Space Mono"; color: var(--amber); margin: 10px 0 0; }

.chip { grid-column: 4; grid-row: 1 / 2; padding: 14px; z-index: 2; background: var(--brown); }
.chip h2, .memory-strip h2, .speech h2, .cartridge h2 { font-family: "Press Start 2P"; font-size: 13px; line-height: 1.55; color: var(--amber); margin: 0 0 12px; }
.chip p, .speech p, .cartridge p { font-family: "Space Mono"; line-height: 1.45; margin: 0; }
.led { float: right; width: 18px; height: 18px; background: var(--coral); box-shadow: 0 0 0 6px rgba(255,90,95,.25); animation: ledPulse .7s steps(2, end) infinite; }
.blink { animation-name: panelBoot, attention; animation-duration: .72s, 1.4s; animation-delay: .36s, 1.4s; animation-timing-function: steps(5, end), steps(2, end); animation-fill-mode: forwards, none; animation-iteration-count: 1, infinite; }
@keyframes attention { 50% { box-shadow: 8px 8px 0 var(--brown), 12px 12px 0 var(--coral); } }

.memory-strip { grid-column: 4; grid-row: 2 / 4; padding: 14px; z-index: 2; }
.memory-cell { border: 3px solid var(--milk); margin: 10px 0; padding: 12px 8px; color: var(--milk); background: rgba(248,239,210,.04); text-transform: uppercase; }
.memory-cell.active { background: var(--amber); color: var(--ink); box-shadow: 4px 4px 0 var(--coral); }

.speech { grid-column: 2 / 4; grid-row: 3 / 4; padding: 20px 24px; z-index: 2; background: var(--ink); }
.speech:before { content: ""; position: absolute; left: 48px; top: -20px; width: 32px; height: 20px; background: var(--milk); clip-path: polygon(0 0, 100% 0, 0 100%); }
.speech p { font-size: clamp(16px, 1.7vw, 24px); color: var(--milk); }

.cartridge { grid-column: 2 / 5; grid-row: 4; padding: 12px 20px 12px 112px; z-index: 2; background: var(--milk); color: var(--ink); }
.cartridge h2 { color: var(--ink); margin-bottom: 4px; }
.cart-top { position: absolute; left: 24px; top: 12px; width: 64px; height: 40px; background: var(--amber); border: 4px solid var(--ink); box-shadow: inset 0 -10px 0 var(--coral); }

.state-dock { position: fixed; left: 24px; bottom: 24px; display: flex; gap: 8px; z-index: 12; }
.state-dock button { border: 3px solid var(--milk); background: var(--ink); color: var(--milk); padding: 10px 12px; cursor: pointer; box-shadow: 4px 4px 0 var(--brown); }
.state-dock button.active { background: var(--amber); color: var(--ink); box-shadow: 4px 4px 0 var(--coral); }

.scroll-states { position: relative; z-index: -1; }
.scroll-states section { height: 100vh; }

body.step-capture .monitor { background: var(--ink); color: var(--milk); }
body.step-capture h1 { color: var(--milk); }
body.step-trace .trace { stroke-width: 9; opacity: 1; }
body.step-trace .speech { background: var(--brown); }
body.step-save .cartridge { transform: translateY(-8px) scale(1.015); box-shadow: 12px 12px 0 var(--coral); }
body.step-save .camera, body.step-save .chip { filter: saturate(.75); }

@media (max-width: 920px) {
  body { min-height: auto; }
  .dashboard { position: relative; min-height: 100vh; grid-template-columns: 1fr; grid-template-rows: auto; padding: 16px; }
  .panel, .monitor, .camera, .chip, .memory-strip, .speech, .cartridge, .rail { grid-column: 1; grid-row: auto; }
  .rail { flex-direction: row; justify-content: center; }
  .rail p, .rail b { writing-mode: horizontal-tb; }
  .state-dock { position: sticky; bottom: 8px; left: 8px; flex-wrap: wrap; margin: 16px; }
  .scroll-states { display: none; }
}