/* ==========================================================================
   胞域 · 元胞智能实验室
   页面跟随站点深浅主题；实验舞台本身始终是暗的（像一块培养皿）。
   ========================================================================== */

:root {
  --bg: #08090a;
  --bg-soft: #0d0f10;
  --panel: #0f1112;
  --panel-2: #131617;
  --fg: #ecedf1;
  --dim: #a9a9b3;
  --muted: #8d8d99;
  --line: rgba(255, 255, 255, 0.11);
  --line-soft: rgba(255, 255, 255, 0.06);
  --gold: #c9a97c;
  --gold-soft: rgba(201, 169, 124, 0.14);
  --food: #5fd3a3;
  --agent: #e9c48c;
  --stage: #060809;
  --radius: 4px;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC",
    "Times New Roman", Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --maxw: 1280px;
  --gutter: clamp(18px, 4vw, 44px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

:root[data-theme="light"] {
  --bg: #f7f5f2;
  --bg-soft: #efece7;
  --panel: #ffffff;
  --panel-2: #ffffff;
  --fg: #16161a;
  --dim: #4a4a54;
  --muted: #6b6b76;
  --line: rgba(0, 0, 0, 0.13);
  --line-soft: rgba(0, 0, 0, 0.07);
  --gold: #8a6b3c;
  --gold-soft: rgba(138, 107, 60, 0.1);
  --food: #1d7a58;
  --agent: #a8752e;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(201, 169, 124, 0.28); color: var(--fg); }

a { color: inherit; }

button, input { font: inherit; }

button { color: inherit; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--gold);
  color: #0a0a0c;
  text-decoration: none;
  font-size: 13px;
}
:root[data-theme="light"] .skip-link { color: #ffffff; }
.skip-link:focus { top: 12px; }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: var(--gold);
}

/* ------------------------------------------------------------------ header */
.lab-header {
  border-bottom: 1px solid var(--line-soft);
  background: var(--bg);
}

.lab-header__inner {
  display: flex;
  align-items: center;
  gap: 22px;
  height: 64px;
}

.lab-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 13px;
  color: var(--dim);
  transition: color 0.2s var(--ease);
}
.lab-back:hover { color: var(--fg); }
.lab-back span:first-child { font-family: var(--mono); }

.lab-crumb {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--muted);
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.lab-live {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--muted);
}
.lab-live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--food);
  box-shadow: 0 0 0 0 rgba(95, 211, 163, 0.5);
  animation: live-pulse 2.4s infinite;
}
@keyframes live-pulse {
  0% { box-shadow: 0 0 0 0 rgba(95, 211, 163, 0.42); }
  70% { box-shadow: 0 0 0 7px rgba(95, 211, 163, 0); }
  100% { box-shadow: 0 0 0 0 rgba(95, 211, 163, 0); }
}

/* -------------------------------------------------------------------- hero */
.hero {
  padding-block: clamp(44px, 7vw, 84px) clamp(28px, 4vw, 44px);
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(72px, 12vw, 142px);
  line-height: 0.95;
  letter-spacing: 0.08em;
  text-indent: -0.05em;
}

.hero__sub {
  margin: 18px 0 0;
  font-family: var(--serif);
  font-size: clamp(20px, 2.4vw, 28px);
  letter-spacing: 0.14em;
  color: var(--dim);
}

.hero__lede {
  max-width: 760px;
  margin: 26px 0 0;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.95;
  color: var(--dim);
}
.hero__lede--dim {
  margin-top: 10px;
  color: var(--muted);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  margin: 34px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
}
.hero__meta span {
  display: block;
  margin-bottom: 3px;
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.hero__jump { margin-left: auto; align-self: center; }
.hero__jump a {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--gold);
  text-decoration: none;
  white-space: nowrap;
}
.hero__jump a span {
  display: inline;
  margin: 0;
  font-size: inherit;
  letter-spacing: 0;
  color: inherit;
}
.hero__jump a:hover { color: var(--fg); }
#lab { scroll-margin-top: 24px; }

/* ------------------------------------------------------------------- stage */
.stage {
  border: 1px solid var(--line);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03), 0 40px 90px -70px rgba(0, 0, 0, 0.9);
  background: var(--stage);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 40px 90px -70px rgba(0, 0, 0, 0.9);
}

.stage__canvas {
  position: relative;
  aspect-ratio: 176 / 99;
  background: var(--stage);
}

#world {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}

.stage__vignette {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 48%, transparent 38%, rgba(0, 0, 0, 0.58) 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.28), transparent 24%, transparent 72%, rgba(0, 0, 0, 0.4));
}

/* 极淡的格线：提醒你这是一片元胞，而不是一张画 */
.stage__canvas::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.42;
  background-image:
    repeating-linear-gradient(to right, rgba(236, 237, 241, 0.028) 0 1px, transparent 1px calc(100% / 176)),
    repeating-linear-gradient(to bottom, rgba(236, 237, 241, 0.028) 0 1px, transparent 1px calc(100% / 99));
}

.hud--tl {
  top: 14px;
  left: 16px;
  padding: 8px 12px 7px;
  border-radius: 3px;
  background: rgba(4, 6, 7, 0.36);
  backdrop-filter: blur(5px);
}
.hud--tr {
  top: 14px;
  right: 16px;
  display: flex;
  gap: 24px;
  padding: 9px 12px 8px;
  border-radius: 3px;
  background: rgba(4, 6, 7, 0.36);
  backdrop-filter: blur(5px);
  text-align: right;
}

.hud {
  position: absolute;
  z-index: 3;
  pointer-events: none;
  font-family: var(--mono);
  color: #ecedf1;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.6);
}
.hud--tl { top: 16px; left: 20px; }
.hud--tr {
  top: 18px;
  right: 20px;
  display: flex;
  gap: 24px;
  text-align: right;
}

.hud__gen {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(236, 237, 241, 0.66);
}
.hud__gen b {
  margin-inline: 6px;
  font-size: 26px;
  font-weight: 500;
  letter-spacing: 0;
  color: #f5f5f7;
  vertical-align: -2px;
}
.hud__tick {
  margin-top: 2px;
  font-size: 9px;
  letter-spacing: 0.26em;
  color: rgba(236, 237, 241, 0.48);
}

.hud--tr div {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: rgba(236, 237, 241, 0.48);
}
.hud--tr b {
  display: block;
  margin-top: 1px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(236, 237, 241, 0.92);
}

.stage__legend {
  position: absolute;
  left: 20px;
  bottom: 14px;
  z-index: 3;
  display: flex;
  gap: 18px;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.08em;
  color: rgba(236, 237, 241, 0.58);
}
.legend__item { display: inline-flex; align-items: center; gap: 7px; }
.legend__ramp {
  width: 52px;
  height: 3px;
  background: linear-gradient(90deg, #0a1612, #2c7d61, #6fe3b0);
}
.legend__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #ecc78f;
  box-shadow: 0 0 7px rgba(236, 199, 143, 0.8);
}
.legend__ring {
  width: 8px;
  height: 8px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 50%;
}

.stage__hint {
  position: absolute;
  right: 20px;
  bottom: 14px;
  z-index: 3;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: rgba(236, 237, 241, 0.46);
  transition: opacity 0.4s var(--ease);
}

/* ----------------------------------------------------------------- toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #0b0d0e;
  color: #ecedf1;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 38px;
  padding: 0 15px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 3px;
  background: transparent;
  cursor: pointer;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.06); border-color: rgba(255, 255, 255, 0.24); }
.icon-btn svg { width: 13px; height: 13px; fill: currentColor; }
.icon-btn__label { font-size: 12px; letter-spacing: 0.08em; color: rgba(236, 237, 241, 0.82); }

.seg {
  display: inline-flex;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 3px;
  overflow: hidden;
}
.seg button {
  min-width: 42px;
  height: 36px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: rgba(236, 237, 241, 0.56);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}
.seg button + button { border-left: 1px solid rgba(255, 255, 255, 0.1); }
.seg button:hover { color: #fff; background: rgba(255, 255, 255, 0.05); }
.seg button[aria-pressed="true"] {
  background: rgba(201, 169, 124, 0.18);
  color: #e8ceb0;
}

.toolbar__divider {
  width: 1px;
  height: 24px;
  background: rgba(255, 255, 255, 0.1);
  margin-inline: 2px;
}

.slider {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: rgba(236, 237, 241, 0.55);
}
.slider b {
  min-width: 38px;
  font-weight: 500;
  color: rgba(236, 237, 241, 0.85);
  text-align: right;
}
.slider input {
  width: 92px;
  accent-color: var(--gold);
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: transparent;
  color: var(--fg);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.btn:hover { border-color: var(--gold); background: var(--line-soft); }

.btn--gold {
  border-color: var(--gold);
  background: var(--gold-soft);
  color: var(--gold);
}
.btn--gold:hover {
  background: var(--gold-soft);
  border-color: var(--gold);
  filter: brightness(1.12);
}

.btn--ghost { color: var(--dim); }

.btn--tiny {
  height: 28px;
  padding: 0 10px;
  font-size: 11px;
  border-color: var(--line);
  color: var(--dim);
}

/* 工具栏永远在暗色舞台里，按钮不能跟着页面主题变深 */
.toolbar .btn {
  border-color: rgba(255, 255, 255, 0.16);
  color: rgba(236, 237, 241, 0.78);
}
.toolbar .btn:hover {
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.06);
}

.toolbar__reset { margin-left: 2px; }

/* ------------------------------------------------------------------ panels */
.panels {
  display: grid;
  grid-template-columns: 1.02fr 1.16fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 288px;
  padding: 17px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
}

.card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.card__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.card__live {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--food);
}
:root[data-theme="light"] .card__live { color: #1d7a58; }
.card__live.is-dead { color: var(--muted); }

.big {
  display: flex;
  gap: 32px;
  margin-bottom: 12px;
}
.big__item b {
  display: block;
  font-family: var(--mono);
  font-size: clamp(30px, 3vw, 38px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.big__item span {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.rows {
  margin: 0 0 16px;
  border-top: 1px solid var(--line-soft);
}
.rows > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line-soft);
}
.rows dt {
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.rows dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg);
}

.card .btn--gold { margin-top: auto; }

.chart__legend {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.chart__legend b {
  font-weight: 500;
  color: var(--fg);
  letter-spacing: 0;
}
.swatch {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-left: 6px;
}
.swatch--pop { background: var(--gold); }
.swatch--food { background: var(--food); }

#chart {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 520 / 190;
  margin-top: 2px;
}

.card__note {
  margin: auto 0 0;
  padding-top: 12px;
  font-size: 11.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------------------------------------------------------------- inspector */
.agent-empty p { margin: 0 0 10px; font-size: 13.5px; color: var(--dim); }
.agent-empty__hint { color: var(--muted) !important; font-size: 12px !important; }
.agent-empty .btn { margin-top: 4px; }

.agent-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.agent-head b { font-family: var(--mono); font-size: 17px; font-weight: 500; }
.agent-head span { font-family: var(--mono); font-size: 10px; color: var(--muted); }

.agent-energy {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--muted);
}
.agent-energy i {
  flex: 1;
  height: 3px;
  background: var(--line);
  overflow: hidden;
}
.agent-energy i b {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gold);
  transition: width 0.16s linear;
}
.agent-energy em { font-style: normal; color: var(--fg); }

.agent-grids {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.vision, .actions { margin: 0; flex: 1; min-width: 0; }
.vision figcaption, .actions figcaption {
  margin-bottom: 7px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--muted);
  white-space: nowrap;
}
.vision figcaption span, .actions figcaption span { opacity: 0.55; }

.vision__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 2px;
  width: 100%;
  max-width: 128px;
  aspect-ratio: 1;
}
.vision__cell {
  border-radius: 1px;
  background: #0a1512;
  position: relative;
}
.vision__cell.is-self {
  outline: 1px solid rgba(233, 196, 140, 0.9);
  outline-offset: -1px;
}

.actions__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  width: 100%;
  max-width: 112px;
}
.action-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  background: var(--line-soft);
}
.action-cell.is-chosen {
  border-color: var(--gold);
  color: var(--fg);
  box-shadow: 0 0 0 1px var(--gold-soft) inset;
}

.agent-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
  padding-top: 16px;
}
.agent-foot > span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.lab__caption {
  margin: 14px 0 0;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--muted);
}
.lab__caption span { margin-right: 8px; color: var(--gold); }

/* ------------------------------------------------------------------- notes */
.notes {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: clamp(32px, 7vw, 96px);
  margin-top: clamp(64px, 9vw, 120px);
  padding-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--line);
}

.notes__intro h2,
.evidence h2,
.caveats h2 {
  margin: 0 0 18px;
  text-wrap: balance;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.25;
  letter-spacing: 0.04em;
}

.notes__intro p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--dim);
}
.notes__intro p.notes__aside {
  padding-left: 16px;
  border-left: 2px solid var(--gold-soft);
  font-size: 13px;
  color: var(--muted);
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}
.step {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}
.step__num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--gold);
  padding-top: 5px;
}
.step h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--dim);
}

/* ---------------------------------------------------------------- evidence */
.evidence {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
  margin-top: clamp(64px, 9vw, 110px);
  padding-block: clamp(32px, 5vw, 52px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.evidence__copy p {
  margin: 0 0 14px;
  max-width: 620px;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--dim);
}
.evidence__copy p.evidence__caveat {
  font-size: 12.5px;
  color: var(--muted);
}

.evidence__meter {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}
.meter__row {
  display: grid;
  grid-template-columns: 86px 1fr 52px;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
}
.meter__row i {
  display: block;
  height: 7px;
  background: var(--line-soft);
  overflow: hidden;
}
.meter__row i b {
  display: block;
  height: 100%;
  background: var(--muted);
}
.meter__row--gold i b { background: var(--gold); }
.meter__row em {
  font-style: normal;
  text-align: right;
  color: var(--fg);
}
.meter__note {
  margin: 14px 0 12px;
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.evidence__meter .btn { height: 30px; padding: 0 12px; font-size: 10.5px; }

/* ----------------------------------------------------------------- caveats */
.caveats {
  margin-top: clamp(56px, 8vw, 90px);
}
.caveats h2 { margin-bottom: 22px; }
.caveats ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.caveats li {
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.9;
  color: var(--dim);
}
.caveats b { color: var(--fg); font-weight: 500; }

/* ------------------------------------------------------------------ method */
.method {
  margin-top: clamp(44px, 6vw, 72px);
}
.method details {
  border-top: 1px solid var(--line-soft);
  padding-top: 18px;
}
.method summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--muted);
  list-style: none;
}
.method summary::-webkit-details-marker { display: none; }
.method summary::before {
  content: "+";
  display: inline-block;
  width: 16px;
  color: var(--gold);
}
.method details[open] summary::before { content: "−"; }
.method summary:hover { color: var(--fg); }

.method__body {
  padding: 18px 0 8px 16px;
  max-width: 860px;
}
.method__body p {
  margin: 0 0 12px;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--dim);
}
.method__body code {
  padding: 1px 5px;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  background: var(--bg-soft);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg);
}

/* ------------------------------------------------------------------ footer */
.lab-footer {
  margin-top: clamp(64px, 9vw, 110px);
  border-top: 1px solid var(--line-soft);
}
.lab-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-block: 26px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.lab-footer a { text-decoration: none; color: var(--dim); }
.lab-footer a:hover { color: var(--fg); }

/* ------------------------------------------------------------------ dialog */
dialog {
  width: min(560px, calc(100vw - 34px));
  max-height: calc(100dvh - 40px);
  overflow: auto;
  padding: 28px 30px 24px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--fg);
  box-shadow: 0 40px 120px -30px rgba(0, 0, 0, 0.75);
}
dialog::backdrop {
  background: rgba(4, 5, 6, 0.72);
  backdrop-filter: blur(5px);
}
dialog h2 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 500;
  letter-spacing: 0.03em;
}
.dialog__intro {
  margin: 0 0 22px;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--dim);
}
.dialog__close-form { float: right; margin: -6px -8px 0 0; }
.dialog__close {
  width: 34px;
  height: 34px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
}
.dialog__close:hover { background: var(--line-soft); color: var(--fg); }

.assay__loading {
  margin: 24px 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  animation: blink 1.2s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0.35; } }

.assay__row {
  display: grid;
  grid-template-columns: 78px 1fr 64px;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--dim);
}
.assay__bar {
  height: 9px;
  background: var(--line-soft);
  overflow: hidden;
}
.assay__bar i {
  display: block;
  height: 100%;
  background: var(--muted);
  transition: width 0.8s var(--ease);
}
.assay__row--evo .assay__bar i { background: var(--gold); }
.assay__val {
  font-family: var(--mono);
  font-size: 12px;
  text-align: right;
  color: var(--fg);
}
.assay__ratio {
  margin: 20px 0 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
}
.assay__ratio b {
  font-size: 26px;
  font-weight: 400;
  color: var(--gold);
  letter-spacing: -0.01em;
}
.assay__note {
  margin: 0;
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--muted);
}
.dialog__actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 22px;
}
.dialog__actions form { margin: 0; }

/* ------------------------------------------------------------------ mobile */
@media (max-width: 1000px) {
  .panels { grid-template-columns: 1fr 1fr; }
  .card--agent { grid-column: 1 / -1; min-height: 0; }
  .agent-grids { gap: 32px; }
  .vision__grid { max-width: 132px; }
  .actions__grid { max-width: 118px; }
  .agent-foot { margin-top: 0; }
  .notes { grid-template-columns: 1fr; gap: 40px; }
  .caveats ul { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 720px) {
  .lab-crumb { display: none; }
  .lab-live { margin-left: auto; }
  .hero h1 { letter-spacing: 0.04em; }
  .hero__meta { gap: 12px 24px; }
  .panels { grid-template-columns: 1fr; }
  .stage {
    margin-inline: calc(var(--gutter) * -1);
    border-inline: 0;
    border-radius: 0;
  }
  .evidence h2,
  .caveats h2 { font-size: clamp(24px, 7.4vw, 30px); }
  .card--agent { grid-column: auto; }
  .card { min-height: 0; }
  .card .btn--gold { margin-top: 4px; }
  .toolbar { gap: 8px; }
  .toolbar__divider { display: none; }
  .slider { margin-left: 0; width: 100%; justify-content: flex-start; }
  .slider input { flex: 1; max-width: 160px; }
  .toolbar__reset { margin-left: auto; }
  .seg button { min-width: 38px; padding: 0 9px; }
  .stage__legend { gap: 12px; font-size: 8.5px; }
  .stage__legend .legend__item:last-child { display: none; }
  .stage__hint { display: none; }
  .hud--tr { gap: 16px; }
  .evidence { grid-template-columns: 1fr; }
  .lab__caption { line-height: 1.8; }
  .notes { margin-top: 56px; }
  .caveats b { display: block; margin-bottom: 2px; }
  dialog { padding: 24px 20px 20px; }
}

@media (max-width: 420px) {
  .hero h1 { font-size: 62px; }
  .hero__sub { font-size: 17px; letter-spacing: 0.08em; }
  .agent-grids { gap: 20px; }
  .vision__grid { max-width: 112px; }
  .actions__grid { max-width: 100px; }
  .lab-footer__inner { flex-direction: column; gap: 6px; }
}

@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;
  }
}