:root {
  --bg: #f4f0e8;
  --fg: #0b0b0b;
  --muted: #756f65;
  --line: rgba(11, 11, 11, 0.16);
  --accent: #1f4fd8;
  --trace: #9b7451;
  --return: #5f754c;
  --fault: #963c34;

  --chain: 0.4;
  --flux: 0.2;
  --resources: 0.2;
  --tracep: 0.2;
  --returnp: 0.1;
  --memory: 0.08;
  --field-tension: 0;
  --field-density: 0;

  --field-height: clamp(28rem, 62vh, 52rem);
  --title-size: clamp(3.2rem, 10vw, 13.8rem);
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(to right, rgba(11,11,11,0.014) 1px, transparent 1px) 0 0 / 25vw 100vh,
    linear-gradient(to bottom, rgba(11,11,11,0.014) 1px, transparent 1px) 0 0 / 100vw 33.33vh,
    radial-gradient(ellipse at calc(50% + var(--flux) * 11%) calc(48% + var(--resources) * 9%), rgba(11,11,11,0.026), transparent 48%),
    radial-gradient(ellipse at calc(76% - var(--memory) * 20%) calc(72% - var(--field-tension) * 18%), color-mix(in srgb, var(--trace) calc(var(--memory) * 22%), transparent), transparent 40%),
    var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.regime-screen {
  --bg: #070707;
  --fg: #f1ecdf;
  --muted: #958e82;
  --line: rgba(241,236,223,0.14);
  --accent: #e55347;
  --trace: #b8874b;
  --return: #8daa77;
  --fault: #d16f61;
}

body.regime-paper {
  --bg: #f4f0e8;
  --fg: #0b0b0b;
  --muted: #756f65;
  --line: rgba(11,11,11,0.16);
}

body.regime-absence {
  --bg: #171512;
  --fg: #ece2d0;
  --muted: #827a6d;
  --line: rgba(236,226,208,0.12);
  --accent: #ece2d0;
}

body.measuring .field {
  opacity: 0.08;
  filter: blur(0.6px);
}

body.measuring .preline::after {
  content: " / mesure";
  color: var(--accent);
}

body.placed .field {
  opacity: 1;
  filter: none;
}

a { color: inherit; text-decoration: none; border-bottom: 1px solid currentColor; }

button {
  appearance: none;
  border: 1px solid currentColor;
  border-radius: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  color: inherit;
  font: inherit;
  padding: 0.68rem 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.105em;
  cursor: pointer;
}

button:hover,
button:focus-visible,
a:hover,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 0.22rem;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 200;
  transform: translateY(-200%);
  background: var(--fg);
  color: var(--bg);
  padding: 0.75rem 0.9rem;
  border: 0;
}

.skip-link:focus { transform: translateY(0); }

.apparatus {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  padding: clamp(1rem, 2vw, 2rem);
  gap: clamp(0.9rem, 1.7vw, 1.8rem);
  overflow: hidden;
}

.topbar,
.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: clamp(0.68rem, 0.82vw, 0.92rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand {
  border: 0;
  color: var(--fg);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.language-switch {
  display: flex;
  gap: 0.4rem;
}

.lang-button {
  border: 0;
  padding: 0.15rem 0.3rem;
  opacity: 0.5;
}

.lang-button.active {
  opacity: 1;
  border-bottom: 1px solid currentColor;
}

.core {
  align-self: center;
  justify-self: center;
  width: min(82vw, 126rem);
  display: grid;
  align-content: center;
}

.preline,
.subline,
.returned {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.78rem, 0.95vw, 1.05rem);
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.preline {
  margin-bottom: clamp(0.8rem, 1.8vh, 1.6rem);
}

.subline {
  max-width: 58ch;
  margin-top: clamp(0.9rem, 2.4vh, 2rem);
  color: var(--fg);
  text-transform: none;
  letter-spacing: -0.02em;
  font-size: clamp(1rem, 1.25vw, 1.34rem);
  line-height: 1.25;
}

.returned {
  max-width: 70ch;
  margin-top: 0.9rem;
  color: var(--trace);
  opacity: calc(0.58 + var(--memory) * 0.34);
}

.field-shell {
  position: relative;
  width: 100%;
  height: var(--field-height);
  border: 1px solid transparent;
  overflow: visible;
}

.field {
  position: absolute;
  inset: 0;
  transition: opacity 160ms ease, filter 160ms ease;
}

.measure-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  visibility: hidden;
}

.word {
  position: absolute;
  display: inline-block;
  white-space: nowrap;
  font-size: var(--title-size);
  line-height: 0.77;
  letter-spacing: calc(-0.108em + var(--local-letter, 0em));
  word-spacing: var(--local-word, 0em);
  font-weight: 560;
  color: var(--word-color, currentColor);
  opacity: calc(0.60 + var(--ww, 0.5) * 0.36);
  transform:
    translate3d(var(--x), var(--y), 0)
    scaleX(var(--sx, 1))
    scale(var(--scale, 1));
  transform-origin: left top;
  cursor: pointer;
}

.measure-word {
  position: absolute;
  visibility: hidden;
  white-space: nowrap;
  font-size: var(--title-size);
  line-height: 0.77;
  letter-spacing: calc(-0.108em + var(--local-letter, 0em));
  font-weight: 560;
}

.word[data-status="trace"],
.word[data-status="flux"] { --word-color: var(--trace); }

.word[data-status="retour"],
.word[data-status="memoire"] { --word-color: var(--return); }

.word[data-status="relation"] { --word-color: var(--accent); }
.word[data-status="faille"] { --word-color: var(--fault); }

.word:hover,
.word:focus {
  outline: 1px solid currentColor;
  outline-offset: 0.10em;
}

.letter {
  display: inline-block;
  pointer-events: none;
  opacity: calc(0.44 + var(--lw, 0.5) * 0.56);
  font-weight: calc(340 + var(--lw, 0.5) * 500);
  letter-spacing: calc((var(--lw, 0.5) - 0.5) * 0.064em);
  transform:
    translateY(calc((var(--lw, 0.5) - 0.5) * var(--flux) * -0.095em))
    scaleX(calc(0.974 + var(--lw, 0.5) * 0.050));
}

.word[data-status="compression"] .letter {
  letter-spacing: calc(-0.065em * var(--ww, 0.5));
  transform: scaleX(calc(1 - var(--ww, 0.5) * 0.13));
}

.word[data-status="absence"] .letter,
.word[data-status="opacite"] .letter {
  opacity: calc(0.30 + var(--lw, 0.5) * 0.58);
  letter-spacing: calc(0.02em + var(--lw, 0.5) * 0.045em);
}

.anchor-mark {
  position: absolute;
  width: clamp(0.38rem, 0.7vw, 0.7rem);
  height: clamp(0.38rem, 0.7vw, 0.7rem);
  border-radius: 50%;
  background: currentColor;
  color: var(--accent);
  opacity: calc(0.26 + var(--field-tension) * 0.38);
  transform: translate3d(var(--x), var(--y), 0);
  pointer-events: none;
}

.chain {
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding-top: 0.85rem;
}

.chain dl {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(6, minmax(7rem, 1fr));
  gap: 0.7rem 1.4rem;
}

dt {
  color: var(--muted);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

dd {
  margin: 0.12rem 0 0;
  font-size: clamp(0.78rem, 0.95vw, 1rem);
  overflow-wrap: anywhere;
}

.operations {
  display: flex;
  align-items: start;
  justify-content: end;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.footer {
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
}

.inspector {
  position: fixed;
  right: clamp(1rem, 2vw, 2rem);
  bottom: clamp(1rem, 2vw, 2rem);
  z-index: 100;
  width: min(35rem, calc(100vw - 2rem));
  max-height: min(84vh, 46rem);
  overflow: auto;
  border: 1px solid currentColor;
  background: color-mix(in srgb, var(--bg) 96%, transparent);
  color: var(--fg);
  padding: 1rem;
  transform: translateY(calc(100% + 2rem));
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.inspector.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.close {
  float: right;
  border: 0;
  padding: 0 0.25rem;
  font-size: 1.35rem;
}

.inspector-kicker {
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 0.5rem;
}

.inspector h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.9rem, 4.4vw, 5.2rem);
  line-height: 0.86;
  letter-spacing: -0.08em;
  font-weight: 560;
}

.inspector dl {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem 1rem;
  margin: 0;
}

.inspector-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.letter-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 0.26rem;
  border-top: 1px solid var(--line);
  padding-top: 0.7rem;
  margin-top: 1rem;
}

.letter-node {
  border: 1px solid var(--line);
  min-width: 2rem;
  min-height: 2.2rem;
  display: grid;
  place-items: center;
  opacity: calc(0.42 + var(--v) * 0.58);
  font-weight: calc(360 + var(--v) * 470);
  transform: translateY(calc((var(--v) - 0.5) * -0.35rem));
  text-transform: none;
  letter-spacing: 0;
  padding: 0.25rem;
  cursor: crosshair;
}

.letter-node:hover,
.letter-node:focus-visible {
  color: var(--accent);
}

.bars {
  display: flex;
  align-items: end;
  gap: 0.15rem;
  min-height: 3.5rem;
  border-top: 1px solid var(--line);
  padding-top: 0.6rem;
  margin-top: 0.9rem;
}

.bar {
  display: grid;
  align-items: end;
  justify-items: center;
  min-width: 1.1rem;
  color: var(--muted);
}

.bar i {
  display: block;
  width: 0.45rem;
  height: calc(0.35rem + var(--v) * 2.3rem);
  background: currentColor;
  opacity: calc(0.30 + var(--v) * 0.62);
}

.bar span {
  margin-top: 0.22rem;
  font-size: 0.72rem;
}

.noscript {
  position: fixed;
  inset: auto 1rem 1rem;
  background: var(--fg);
  color: var(--bg);
  padding: 1rem;
}

@media (max-width: 980px) {
  .core { width: 100%; }
  .chain { grid-template-columns: 1fr; }
  .chain dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .operations { justify-content: start; }
}

@media (max-width: 640px) {
  :root {
    --field-height: clamp(26rem, 58vh, 38rem);
    --title-size: clamp(3rem, 17vw, 7rem);
  }

  .topbar,
  .footer {
    flex-direction: column;
  }

  .chain dl {
    grid-template-columns: 1fr;
  }

  .inspector {
    right: 0;
    left: 0;
    bottom: 0;
    width: 100vw;
    max-height: 74vh;
  }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}