:root {
  --paper: #c8d8af;
  --ink: #122116;
  --orange: #ef5f2f;
  --cobalt: #2e50ba;
  --machine-green: #2f7f4d;
  --line: #1b2a1d;
  --slime: #84d44b;
  --deep-space: #16352b;
  --sage-pop: #afce74;
  --deco-gold: #d2b857;
  --fog-green: #e2efca;
  --gb0: #10220f;
  --gb1: #2f4f2f;
  --gb2: #6e8f4b;
  --gb3: #c8d8af;
  --fx-mutate: #ff4fd8;
  --fx-player: #37a6ff;
  --fx-danger: #ef5f2f;
  --mono: "IBM Plex Mono", "Cascadia Mono", "Courier New", monospace;
  --gothic: "Yu Gothic", "YuGothic", "MS Gothic", "Meiryo", sans-serif;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  position: relative;
  background:
    radial-gradient(circle at 8% 12%, rgba(132, 212, 75, 0.24), transparent 35%),
    radial-gradient(circle at 90% 82%, rgba(46, 80, 186, 0.16), transparent 38%),
    linear-gradient(145deg, #9fbd69, #7ca663);
  color: var(--ink);
  font-family: var(--gothic);
  line-height: 1.4;
  overflow-x: hidden;
}

.paper-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background-image:
    radial-gradient(rgba(0, 0, 0, 0.08) 0.45px, transparent 0.45px),
    radial-gradient(rgba(0, 0, 0, 0.04) 0.45px, transparent 0.45px);
  background-size: 3px 3px, 5px 5px;
  background-position: 0 0, 1px 1px;
  opacity: 0.25;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: var(--cobalt);
  color: #fff;
  padding: 0.5rem 0.75rem;
  border: 2px solid var(--ink);
}

.shell {
  display: grid;
  grid-template-columns: minmax(54px, 74px) 1fr;
  min-height: calc(100vh - 4.2rem);
}

.meta-rail {
  border-right: 2px solid var(--line);
  background: linear-gradient(180deg, color-mix(in srgb, var(--slime) 70%, #d7ecb1), var(--sage-pop));
  padding: 0.8rem 0.4rem;
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.meta-kicker {
  font: 700 0.62rem/1 var(--mono);
  writing-mode: vertical-rl;
  letter-spacing: 0.15em;
  margin: 0 auto;
}

.coordinate-nav {
  display: grid;
  gap: 0.55rem;
}

.coord {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--fog-green) 78%, var(--deco-gold));
  font: 600 0.62rem/1.2 var(--mono);
  padding: 0.45rem 0.2rem;
  min-height: 100px;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.coord:hover,
.coord:focus-visible,
.coord.is-active {
  background: color-mix(in srgb, var(--slime) 70%, var(--cobalt));
  color: #08120b;
  transform: translateY(-2px);
  outline: none;
}

.meta-stack {
  margin: 0 auto;
  writing-mode: vertical-rl;
  font: 500 0.55rem/1.1 var(--mono);
  letter-spacing: 0.11em;
}

.control-layer {
  display: grid;
  grid-template-columns: minmax(220px, 360px) 1fr;
  gap: clamp(1rem, 2.5vw, 2rem);
  padding: clamp(1rem, 2.3vw, 2.4rem);
  background:
    linear-gradient(130deg, color-mix(in srgb, var(--fog-green) 88%, #fff), var(--paper));
}

.title-block {
  align-self: start;
  border: 2px solid var(--line);
  background: linear-gradient(145deg, var(--deep-space), #285140);
  color: #dff6be;
  padding: 0.85rem 1rem;
  box-shadow: 5px 5px 0 rgba(16, 33, 22, 0.24);
}

.title-block h1 {
  margin: 0;
  font: 800 clamp(2.2rem, 6vw, 5rem) / 0.92 var(--gothic);
  letter-spacing: 0.03em;
}

.title-block p {
  margin: 0.35rem 0 0;
  font: 600 0.82rem/1.2 var(--mono);
  letter-spacing: 0.15em;
  color: color-mix(in srgb, var(--deco-gold) 78%, #f3e8ab);
}

.experiment-console {
  grid-column: 1 / -1;
  justify-self: center;
  width: min(900px, 88vw);
  margin-top: clamp(1rem, 3vw, 3rem);
  transform: translateX(6vw);
  background: linear-gradient(145deg, #7ea95d, #6d9556);
  border: 2px solid var(--line);
  padding: 0.6rem 0.85rem 0.85rem;
  box-shadow: 6px 6px 0 rgba(16, 33, 22, 0.2);
}

.window-chrome {
  display: flex;
  gap: 0.45rem;
  align-items: center;
  justify-content: flex-start;
  margin: 0 0 0.38rem 1.45rem;
}

.dot {
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  border: 1px solid var(--line);
}

.dot-close {
  background: var(--orange);
}

.dot-min {
  background: var(--machine-green);
}

.dot-max {
  background: var(--cobalt);
}

.bevel-frame {
  position: relative;
  min-height: clamp(260px, 42vw, 520px);
  border: 3px solid var(--line);
  background:
    linear-gradient(145deg, rgba(242, 251, 220, 0.52), rgba(16, 33, 22, 0.1)),
    linear-gradient(0deg, rgba(46, 80, 186, 0.08), rgba(239, 95, 47, 0.05));
  box-shadow:
    0 1px 0 #fff inset,
    0 -1px 0 rgba(0, 0, 0, 0.25) inset,
    8px 8px 0 rgba(0, 0, 0, 0.15);
  display: grid;
  place-items: center;
  transition:
    transform 460ms cubic-bezier(0.2, 0.72, 0.2, 1),
    border-color 460ms cubic-bezier(0.2, 0.72, 0.2, 1),
    box-shadow 460ms cubic-bezier(0.2, 0.72, 0.2, 1);
}

.bevel-frame:focus-visible {
  outline: 3px dashed var(--cobalt);
  outline-offset: 4px;
}

.frame-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(23, 23, 23, 0.13) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23, 23, 23, 0.13) 1px, transparent 1px);
  background-size: 22px 22px;
  mix-blend-mode: multiply;
  opacity: 0.4;
  transition: opacity 360ms ease, transform 520ms cubic-bezier(0.2, 0.72, 0.2, 1);
}

.placeholder-label {
  position: relative;
  margin: 0;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--fog-green) 78%, #fff);
  font: 700 0.78rem/1.2 var(--mono);
  letter-spacing: 0.11em;
  transition:
    opacity 260ms ease,
    transform 360ms cubic-bezier(0.2, 0.72, 0.2, 1),
    filter 360ms ease;
}

.placeholder-label.is-hidden {
  display: none;
}

.panel-exit .placeholder-label {
  opacity: 0;
  transform: translateY(16px) scale(0.98);
  filter: blur(1px);
}

.panel-enter .placeholder-label {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

.panel-exit .frame-grid {
  opacity: 0.2;
  transform: translateX(-10px);
}

.panel-enter .frame-grid {
  opacity: 0.45;
  transform: translateX(0);
}

.sim-shell {
  position: relative;
  z-index: 1;
  width: min(94%, 860px);
  display: grid;
  grid-template-columns: 56px 1fr;
  grid-template-rows: 1fr auto auto;
  gap: 0.55rem;
  align-items: start;
  transition: filter 220ms ease, opacity 220ms ease;
}

.sim-shell.is-inactive {
  filter: blur(5px) saturate(0.7) brightness(0.88);
  opacity: 0.5;
  pointer-events: none;
  user-select: none;
}

.sim-toolbar {
  grid-column: 1;
  grid-row: 1 / 3;
  display: grid;
  gap: 0.4rem;
  padding: 0.35rem;
  border: 2px solid var(--gb0);
  background: linear-gradient(170deg, var(--gb3), color-mix(in srgb, var(--gb3) 76%, var(--gb2)));
}

.tool-icon {
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 2px solid var(--gb0);
  background: var(--gb2);
  padding: 0.18rem;
  cursor: pointer;
}

.tool-icon img {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.tool-icon:hover,
.tool-icon:focus-visible {
  transform: translate(-1px, -1px);
  outline: none;
}

.tool-icon.is-active {
  background: color-mix(in srgb, var(--gb2) 70%, var(--fx-player));
  box-shadow: 0 0 0 2px var(--gb3) inset;
}

.sim-canvas {
  grid-column: 2;
  grid-row: 1;
  width: 100%;
  max-width: 760px;
  border: 2px solid var(--gb0);
  background: var(--gb3);
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.utopia-toggle {
  position: absolute;
  top: 0.38rem;
  right: 0.38rem;
  z-index: 2;
  width: 28px;
  height: 28px;
  border: 2px solid var(--gb0);
  background: color-mix(in srgb, var(--gb3) 78%, #fff);
  padding: 0.14rem;
  cursor: pointer;
}

.utopia-toggle img {
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.utopia-toggle.is-on {
  background: color-mix(in srgb, var(--gb2) 66%, var(--fx-player));
}

.utopia-toggle:hover,
.utopia-toggle:focus-visible {
  transform: translate(-1px, -1px);
  outline: none;
}

.sim-tooltip {
  position: fixed;
  z-index: 25;
  pointer-events: none;
  border: 1px solid var(--gb0);
  background: color-mix(in srgb, var(--gb3) 92%, #fff);
  color: var(--gb0);
  font: 700 0.56rem/1.25 var(--mono);
  letter-spacing: 0.06em;
  padding: 0.32rem 0.38rem;
  white-space: pre-line;
  box-shadow: 2px 2px 0 rgba(16, 34, 15, 0.3);
}

.sim-hud {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  font: 700 0.62rem/1 var(--mono);
  letter-spacing: 0.08em;
}

.sim-hud span {
  border: 1px solid var(--gb0);
  background: color-mix(in srgb, var(--gb3) 88%, #fff);
  padding: 0.26rem 0.4rem;
}

.sim-tool-status {
  grid-column: 1 / -1;
  grid-row: 3;
  margin: 0;
  font: 700 0.56rem/1.1 var(--mono);
  letter-spacing: 0.1em;
}

.tech-strip {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.4rem;
  align-items: center;
  justify-content: flex-end;
  margin-top: 0.9rem;
  font: 600 0.62rem/1 var(--mono);
  letter-spacing: 0.08em;
  background: linear-gradient(120deg, #204536, #2d5d45);
  color: #d8efbb;
  border: 2px solid var(--line);
  padding: 0.65rem 0.85rem;
}

.tech-strip p {
  margin: 0;
}

.sound-toggle {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--sage-pop) 76%, var(--deco-gold));
  color: #122116;
  font: inherit;
  letter-spacing: 0.08em;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  transition: transform 120ms ease;
}

.sound-toggle:hover,
.sound-toggle:focus-visible {
  transform: translate(-1px, -1px);
  outline: none;
}

.sound-toggle.is-on {
  background: color-mix(in srgb, var(--slime) 72%, var(--orange));
}

.identity {
  border-top: 2px solid var(--line);
  padding: 0.9rem 1rem;
  font: 600 0.62rem/1 var(--mono);
  letter-spacing: 0.12em;
  background: linear-gradient(125deg, #142a21, #1f3a2d);
  color: #cfe8b2;
}

@media (max-width: 900px) {
  .control-layer {
    grid-template-columns: 1fr;
  }

  .experiment-console {
    transform: translateX(0);
    width: min(680px, 92vw);
  }

  .title-block h1 {
    font-size: clamp(2rem, 11vw, 3.2rem);
  }

  .sim-shell {
    grid-template-columns: 1fr;
  }

  .sim-toolbar {
    grid-column: 1;
    grid-row: 1;
    grid-template-columns: repeat(8, minmax(36px, 1fr));
    grid-template-rows: 1fr;
  }

  .sim-canvas {
    grid-column: 1;
    grid-row: 2;
  }

  .sim-hud {
    grid-column: 1;
    grid-row: 3;
  }

  .sim-tool-status {
    grid-column: 1;
    grid-row: 4;
  }
}

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