/* Лаборатория v4 — общее для обеих вёрсток: токены (как у сайта, web/site/site.css),
 * компоненты, сценки пояснений. Раскладка компьютера — lab-d.css, телефона — lab-m.css.
 * Движение выключается при prefers-reduced-motion (внизу файла). */
:root {
  --page: #f6f1ea;
  --card: #fffdf9;
  --card-2: #f0e8dd;
  --text: #1f1b17;
  --muted: #645b53;
  --head: #7a5536;
  --accent: #a94f26;
  --accent-text: #ffffff;
  --accent-ink: #8f421f;
  --accent-soft: #f3dccd;
  --line: #e4d9cb;
  --danger: #b3261e;
  --danger-soft: #f8dcd8;
  --ok: #2e7d32;
  --ok-soft: #dcefdc;
  --stage-bg: #ece4d8;
  --mold: #5f8f8a;
  --wax: #efe2c6;
  --wax-edge: #cdb98f;
  --ink: #3b332c;
  --shadow: 0 1px 2px rgb(60 40 20 / 8%), 0 8px 24px -12px rgb(60 40 20 / 28%);
  --radius: 18px;
  --radius-sm: 12px;
  --tap: 44px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --spring: cubic-bezier(.34, 1.56, .64, 1);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --page: #171513;
    --card: #221f1c;
    --card-2: #2b2723;
    --text: #f1ebe3;
    --muted: #b1a79c;
    --head: #d9b08b;
    --accent: #e58b55;
    --accent-text: #1b1714;
    --accent-ink: #f2a676;
    --accent-soft: #3a2a20;
    --line: #36312c;
    --danger: #f2877f;
    --danger-soft: #3d2220;
    --ok: #7bc47f;
    --ok-soft: #1f3321;
    --stage-bg: #1e1b18;
    --mold: #6fa7a0;
    --wax: #d9c9a6;
    --wax-edge: #9e8a62;
    --ink: #e6ddd2;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px -12px rgb(0 0 0 / 60%);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font: 16px/1.5 var(--sans);
}
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.15; margin: 0 0 .4em; }
p { margin: 0 0 .6em; }
a { color: var(--accent-ink); }
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.muted { color: var(--muted); }
.label { font-size: .8rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); margin: .9em 0 .4em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--card); padding: 8px 14px; border-radius: 10px; z-index: 50; }
.skip:focus { top: 12px; }
.fatal { padding: 32px 16px; text-align: center; }
.boot { min-height: 60vh; display: grid; place-items: center; }
.brand { font-family: var(--serif); font-weight: 700; font-size: 1.25rem; color: var(--text); text-decoration: none; }
.lang { font-size: .9rem; text-decoration: none; padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--text); white-space: nowrap; }
.eyebrow { color: var(--head); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; font-size: .8rem; }
.lead { font-size: 1.08rem; color: var(--muted); }

/* кнопки и чипы */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: var(--tap); padding: 0 18px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); text-decoration: none; cursor: pointer; font-weight: 600;
  transition: transform .15s var(--ease), background .2s;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn-ghost { background: transparent; }
.btn-sm { min-height: 36px; padding: 0 14px; font-size: .9rem; }
.btn:disabled { opacity: .45; cursor: default; }
.icon-btn {
  width: var(--tap); height: var(--tap); border-radius: 50%; border: 1px solid var(--line);
  background: var(--card); cursor: pointer; font-size: 1.3rem; line-height: 1; display: inline-grid; place-items: center;
}
.icon-btn:disabled { opacity: .35; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  min-height: 40px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); cursor: pointer; font-size: .95rem;
}
.chip[aria-checked="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.spinner { width: 28px; height: 28px; border-radius: 50%; border: 3px solid var(--line); border-top-color: var(--accent); display: inline-block; animation: spin 0.9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ------------------------------------------------ сцена */
.stage { position: relative; background: radial-gradient(120% 90% at 50% 20%, var(--card) 0%, var(--stage-bg) 70%); overflow: hidden; }
.stage-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }
.stage.no-webgl::before { content: "3D"; position: absolute; inset: 0; display: grid; place-items: center; font: 600 3rem var(--serif); color: var(--line); }
.stage-status {
  position: absolute; left: 50%; top: 14px; transform: translateX(-50%); margin: 0;
  background: var(--card); padding: 6px 14px; border-radius: 999px; font-size: .85rem; box-shadow: var(--shadow); white-space: nowrap; z-index: 2;
}
.stage-hint { position: absolute; right: 14px; top: 14px; margin: 0; font-size: .8rem; color: var(--muted); transition: opacity .4s; pointer-events: none; }
.stage.touched .stage-hint { opacity: 0; }
/* фон по яркости изделия (Stage.setTone): светлое — на тёмном, тёмное — на светлом,
 * в любой теме; подписи поверх сцены перекрашиваются вместе с фоном */
.stage { transition: background-color .4s; }
.stage.on-dark { background: radial-gradient(120% 90% at 50% 20%, #48413a 0%, #1f1c19 72%); }
.stage.on-light { background: radial-gradient(120% 90% at 50% 20%, #ffffff 0%, #e6dfd4 72%); }
.stage.on-dark .stage-hint, .stage.on-dark .how-swipe { color: #ddd3c7; }
.stage.on-light .stage-hint, .stage.on-light .how-swipe { color: #5a5249; }
.stage.is-static .stage-canvas { cursor: grab; }

/* ------------------------------------------------ повзунки */
.knobs { display: grid; gap: 18px; justify-items: start; }
.knob { width: 100%; --lo: 20%; --hi: 80%; position: relative; }
.knob-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.knob-head label { font-weight: 600; }
.knob-val { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--accent-ink); transition: color .2s; }
.knob.is-bad .knob-val { color: var(--danger); }
.knob-track { position: relative; height: 40px; display: flex; align-items: center; }
.knob-track::before {
  content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 10px; transform: translateY(-50%); border-radius: 999px;
  background:
    linear-gradient(90deg, transparent var(--lo), var(--ok-soft) var(--lo), var(--ok-soft) var(--hi), transparent var(--hi)),
    repeating-linear-gradient(135deg, var(--danger-soft) 0 6px, transparent 6px 11px),
    var(--card-2);
  box-shadow: inset 0 0 0 1px var(--line);
}
.knob-track::after {
  content: ""; position: absolute; top: calc(50% - 9px); height: 18px; left: var(--lo); width: calc(var(--hi) - var(--lo));
  border-left: 2px solid var(--ok); border-right: 2px solid var(--ok); pointer-events: none;
}
.knob input[type=range] { position: relative; z-index: 1; width: 100%; margin: 0; height: 40px; background: transparent; -webkit-appearance: none; appearance: none; cursor: pointer; }
.knob input[type=range]::-webkit-slider-runnable-track { height: 10px; background: transparent; }
.knob input[type=range]::-moz-range-track { height: 10px; background: transparent; }
.knob input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 28px; height: 28px; margin-top: -9px; border-radius: 50%;
  background: var(--card); border: 3px solid var(--accent); box-shadow: var(--shadow); transition: border-color .2s, transform .15s;
}
.knob input[type=range]::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: var(--card); border: 3px solid var(--accent); }
.knob.is-bad input[type=range]::-webkit-slider-thumb { border-color: var(--danger); transform: scale(1.1); }
.knob.is-bad input[type=range]::-moz-range-thumb { border-color: var(--danger); }
.knob-scale { display: flex; justify-content: space-between; font-size: .75rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.knob-allowed { color: var(--ok); font-weight: 600; }
.knob-flag { position: absolute; right: 0; top: -2px; font-size: .72rem; font-weight: 700; color: var(--danger); text-transform: uppercase; letter-spacing: .05em; transform: translateY(-100%); }
.knob-flag:empty { display: none; }
.decor input[type=text], .relief-controls input[type=text] {
  width: 100%; min-height: var(--tap); padding: 8px 14px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--card); font-size: 1.05rem;
}
.decor-fields { display: grid; gap: 14px; margin-top: 10px; }
.switch-row { display: flex; align-items: center; gap: 12px; font-weight: 600; cursor: pointer; min-height: var(--tap); }
.switch { appearance: none; -webkit-appearance: none; width: 48px; height: 28px; border-radius: 999px; background: var(--card-2); border: 1px solid var(--line); position: relative; cursor: pointer; margin: 0; flex: none; transition: background .2s; }
.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: var(--card); box-shadow: var(--shadow); transition: transform .2s var(--spring); }
.switch:checked { background: var(--accent); border-color: var(--accent); }
.switch:checked::after { transform: translateX(20px); }
.chips-stack .label:first-child { margin-top: 0; }
.mat .label:first-child { margin-top: 0; }
.swatches { display: flex; flex-wrap: wrap; gap: 8px; }
.swatch {
  width: 40px; height: 40px; padding: 0; border-radius: 50%; cursor: pointer; background: var(--c);
  border: 3px solid var(--card); box-shadow: 0 0 0 1px var(--line); transition: transform .15s var(--ease), box-shadow .15s;
}
.swatch:active { transform: scale(.94); }
.swatch[aria-checked="true"] { box-shadow: 0 0 0 2px var(--accent); }
.mat-hint { font-size: .82rem; margin: 8px 0 0; }

/* ------------------------------------------------ панель пояснения
 * Поверх модели — только «пилюля» статуса; подробности — в выезжающей панели
 * (компьютер: справа в сцене, модель отъезжает; телефон: нижний лист). */
.explain { --st: var(--muted); }
.explain[data-state="idle"] { display: none; }
.explain[data-state="ok"] { --st: var(--ok); }
.explain[data-state="bad"] { --st: var(--danger); }
.ex-pill {
  position: absolute; left: 14px; bottom: 14px; z-index: 3; pointer-events: auto;
  display: inline-flex; align-items: center; gap: 8px; max-width: min(70%, 460px); min-height: var(--tap);
  padding: 6px 12px 6px 8px; border-radius: 999px; cursor: pointer; font: inherit; text-align: left; color: var(--text);
  border: 1px solid color-mix(in srgb, var(--st) 45%, var(--line));
  background: color-mix(in srgb, var(--card) 84%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.4); backdrop-filter: blur(14px) saturate(1.4);
  box-shadow: 0 1px 2px rgb(40 25 10 / 10%), 0 10px 26px -14px rgb(40 25 10 / 45%);
  transition: border-color .3s, background .2s, transform .15s var(--ease);
}
.ex-pill:hover { background: color-mix(in srgb, var(--card) 96%, transparent); }
.ex-pill:active { transform: scale(.98); }
.explain[data-state="info"] .ex-pill { cursor: default; }
.ex-pill-ico { flex: none; width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%;
  background: color-mix(in srgb, var(--st) 16%, transparent); color: var(--st); }
.ex-pill-ico svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.ex-pill-ico .spinner { width: 18px; height: 18px; border-width: 2px; }
.ex-pill-ico .pi-mark { stroke-dasharray: 24; animation: pi-draw .5s .12s var(--ease) both; }
@keyframes pi-draw { from { stroke-dashoffset: 24; } }
.ex-pill-text { font-weight: 700; font-size: .9rem; line-height: 1.25; color: var(--st); min-width: 0; }
.explain[data-state="info"] .ex-pill-text { color: var(--text); font-weight: 600; }
.ex-pill-more { flex: none; font-size: .82rem; font-weight: 600; color: var(--muted); white-space: nowrap; }
.ex-pill-more:empty { display: none; }
.explain[data-state="bad"] .ex-pill-more { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 2px; }
.ex-pill-chev { flex: none; width: 16px; height: 16px; fill: none; stroke: var(--muted); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; transition: transform .3s var(--ease); }
.explain.open .ex-pill-chev { transform: rotate(180deg); }
.explain[data-state="info"] .ex-pill-chev { display: none; }

.ex-drawer {
  position: absolute; z-index: 4; pointer-events: auto; display: flex; flex-direction: column; min-height: 0;
  top: 12px; right: 12px; max-height: calc(100% - 24px); width: min(330px, 46%);
  border: 1px solid color-mix(in srgb, var(--st) 40%, var(--line)); border-radius: var(--radius);
  background: color-mix(in srgb, var(--card) 94%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(1.3); backdrop-filter: blur(18px) saturate(1.3);
  box-shadow: 0 1px 2px rgb(40 25 10 / 10%), 0 18px 40px -18px rgb(40 25 10 / 50%);
}
.ex-drawer[hidden] { display: none; }
.ex-head { display: flex; align-items: center; gap: 6px; padding: 12px 10px 8px 16px; border-bottom: 1px solid var(--line); }
.explain-title { flex: 1; font-weight: 700; margin: 0; line-height: 1.25; color: var(--st); }
.ex-head .icon-btn { width: 34px; height: 34px; font-size: 1rem; flex: none; background: transparent; }
.explain[data-state="ok"] .explain-replay { display: none; }
.ex-scroll { overflow-y: auto; overscroll-behavior: contain; padding: 12px 16px 16px; display: grid; gap: 12px; align-content: start; }
.explain-art { aspect-ratio: 3 / 2; display: grid; place-items: center; background: var(--card-2); border-radius: var(--radius-sm); overflow: hidden; }
.explain-art:empty { display: none; }
.explain-art svg { width: 100%; height: 100%; }
.explain[data-state="ok"] .explain-art { display: none; }
.explain.open .ex-pill { max-width: calc(100% - min(330px, 46%) - 44px); }
.explain.open .ex-pill-text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.explain.open[data-state="bad"] .ex-pill-more { display: none; }
.explain-why { margin: 0 0 .5em; font-size: .95rem; }
.explain-engine { font-size: .88rem; background: var(--card-2); border-radius: 10px; padding: 6px 10px; margin: 0; }
.explain-tag { font-weight: 700; }
.ex-tips[hidden] { display: none; }
.ex-tips .label { margin-top: .6em; }
.explain-tips { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: .88rem; }
.explain-tips li {
  position: relative; padding: 8px 10px 8px 32px; border-radius: 10px; background: var(--card-2); line-height: 1.4;
}
/* протокол проверки (ok): галочка · что проверено · числа */
.ex-proto { list-style: none; margin: 0; padding: 0; display: grid; }
.ck { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--line); }
.ck:first-child { padding-top: 2px; }
.ck:last-child { border-bottom: 0; }
.ck-ico { width: 22px; height: 22px; margin-top: 1px; fill: var(--ok-soft); stroke: var(--ok); stroke-width: 1.6; }
.ck-ico path { fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.ck-t { display: block; font-size: .92rem; line-height: 1.3; }
.ck-d { display: block; margin-top: 3px; font-size: .84rem; line-height: 1.4; color: var(--muted); font-variant-numeric: tabular-nums; }
.ck-list { margin: 4px 0 0; padding-left: 18px; display: grid; gap: 3px; font-size: .84rem; line-height: 1.4; color: var(--muted); }
.ex-proto-foot {
  margin: 2px 0 0; padding: 10px 12px; border-radius: 10px; font-size: .86rem; font-weight: 600; line-height: 1.35;
  background: var(--card-2); border-left: 3px solid var(--ok);
}
.explain[data-state="ok"].is-demo .explain-art { display: grid; }
.ex-muted { opacity: .3; }
.explain-tips li::before {
  content: ""; position: absolute; left: 11px; top: 13px; width: 11px; height: 6px;
  border: solid var(--ok); border-width: 0 0 2px 2px; transform: rotate(-45deg);
}

/* сценки пояснений (SVG 240×160) */
.explain-art svg * { vector-effect: non-scaling-stroke; }
.ex-frame { fill: var(--ink); opacity: .25; }
.ex-bed { fill: var(--ink); opacity: .6; }
.ex-limit { stroke: var(--danger); stroke-width: 2; stroke-dasharray: 4 3; }
.ex-mold { fill: var(--mold); }
.ex-mold-soft { fill: var(--mold); opacity: .45; }
.ex-mold-line { fill: none; stroke: var(--mold); stroke-width: 4; }
.ex-ink { fill: var(--ink); }
.ex-wax { fill: var(--wax); stroke: var(--wax-edge); stroke-width: 1.5; }
.ex-piece { fill: var(--wax); stroke: var(--wax-edge); stroke-width: 1.5; }
.ex-core { fill: var(--mold); opacity: .3; }
.ex-pool { fill: #f6c46a; opacity: .9; }
.ex-wick { stroke: var(--ink); stroke-width: 2.5; }
.ex-flame { fill: #f29a38; transform-box: fill-box; transform-origin: 50% 100%; animation: ex-flicker .5s ease-in-out infinite alternate; }
.ex-drip { fill: none; stroke: #e7b456; stroke-width: 5; stroke-linecap: round; stroke-dasharray: 40; stroke-dashoffset: 40; animation: ex-drip 2.4s var(--ease) infinite; }
.ex-d2 { animation-delay: .6s; }
.ex-ground { stroke: var(--line); stroke-width: 2; }
.ex-dim { fill: none; stroke: var(--danger); stroke-width: 1.5; }
.ex-crack { fill: none; stroke: var(--danger); stroke-width: 2.5; stroke-linecap: round; stroke-dasharray: 40; stroke-dashoffset: 40; animation: ex-draw 2.4s var(--ease) infinite; }
.ex-arrow { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.ex-txt { font: 700 22px var(--sans); fill: var(--ink); }
.ex-txt-in { fill: var(--ink); }
.ex-over .ex-txt { fill: var(--danger); }
.ex-bad-box { fill: none; stroke: var(--danger); stroke-width: 1.5; stroke-dasharray: 4 3; }
.ex-rim { fill: none; stroke: var(--wax-edge); stroke-width: 2; }
.ex-lens { fill: none; stroke: var(--ink); stroke-width: 3; opacity: .7; }
.ex-lens-h { stroke: var(--ink); stroke-width: 6; stroke-linecap: round; opacity: .7; }
.ex-groove { fill: none; stroke: var(--danger); stroke-width: 2; }
.ex-x, .ex-x-small { fill: none; stroke: var(--danger); stroke-width: 5; stroke-linecap: round; opacity: 0; animation: ex-pop 2.4s infinite; }
.ex-x-small { stroke-width: 3; }
.ex-wall-between { fill: var(--mold); opacity: .8; animation: ex-vanish 2.4s var(--ease) infinite; transform-box: fill-box; transform-origin: center; }
.ex-blob { fill: var(--danger); opacity: 0; animation: ex-blob 2.4s var(--ease) infinite; }
.ex-stuck { fill: var(--wax); stroke: var(--danger); stroke-width: 2; opacity: 0; animation: ex-pop 2.4s infinite; }
.ex-layers { fill: none; stroke: var(--mold); stroke-width: 4; }
.ex-bump { fill: var(--accent); animation: ex-fade 2.4s infinite; }
.ex-fade { animation: ex-fade 2.4s infinite; }
.ex-friction { fill: none; stroke: var(--danger); stroke-width: 2; animation: ex-blink .3s steps(2) infinite; }
.ex-gear { fill: none; stroke: var(--muted); stroke-width: 6; }
.ex-gear-hole { fill: none; stroke: var(--muted); stroke-width: 3; }
.ex-gear-teeth { stroke: var(--muted); stroke-width: 8; stroke-linecap: round; }
.ex-ok-ring { fill: none; stroke: var(--ok); stroke-width: 5; stroke-dasharray: 280; stroke-dashoffset: 280; animation: ex-ring .8s var(--ease) forwards; }
.ex-ok-tick { fill: none; stroke: var(--ok); stroke-width: 6; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 70; stroke-dashoffset: 70; animation: ex-ring .5s .5s var(--ease) forwards; }
.ex-grow { transform-box: fill-box; transform-origin: 50% 100%; animation: ex-grow 2.4s var(--ease) infinite alternate; }
.ex-nozzle { animation: ex-nozzle 1.2s ease-in-out infinite alternate; }
.ex-lift { animation: ex-lift 2.4s var(--ease) infinite; }
.ex-half-l, .ex-half-r { transform-box: fill-box; animation: ex-break-l 2.4s var(--ease) infinite; transform-origin: 100% 100%; }
.ex-half-r { animation-name: ex-break-r; transform-origin: 0 100%; }
.ex-squeeze { animation: ex-squeeze 1.2s ease-in-out infinite alternate; }
.ex-text-grow { transform-box: view-box; transform-origin: 120px 80px; animation: ex-text 2.4s var(--ease) infinite alternate; }
.ex-nozzle-try { animation: ex-try 2.4s var(--ease) infinite; }
.ex-left { animation: ex-left 2.4s var(--ease) infinite; }
.ex-right { animation: ex-right 2.4s var(--ease) infinite; }
.ex-stick { animation: ex-stick 2.4s infinite; }
.ex-free { animation: ex-free 2.4s var(--ease) infinite; }
.ex-hook { animation: ex-hook 2.4s var(--ease) infinite; }

@keyframes ex-flicker { to { transform: scaleY(1.12) scaleX(.92); } }
@keyframes ex-drip { 0%, 30% { stroke-dashoffset: 40; } 80%, 100% { stroke-dashoffset: 0; } }
@keyframes ex-draw { 0%, 35% { stroke-dashoffset: 40; } 60%, 100% { stroke-dashoffset: 0; } }
@keyframes ex-pop { 0%, 45% { opacity: 0; } 55%, 100% { opacity: 1; } }
@keyframes ex-vanish { 0%, 30% { transform: scaleX(1); opacity: .8; } 70%, 100% { transform: scaleX(0); opacity: 0; } }
@keyframes ex-blob { 0%, 60% { opacity: 0; } 80%, 100% { opacity: .55; } }
@keyframes ex-fade { 0%, 20% { opacity: 1; } 70%, 100% { opacity: .15; } }
@keyframes ex-blink { to { opacity: .2; } }
@keyframes ex-ring { to { stroke-dashoffset: 0; } }
@keyframes ex-grow { 0%, 15% { transform: scale(.6); } 85%, 100% { transform: scale(1.5, 1.15); } }
@keyframes ex-nozzle { to { transform: translateX(30px); } }
@keyframes ex-lift { 0%, 20% { transform: translateY(0); } 60%, 100% { transform: translateY(-34px); } }
@keyframes ex-break-l { 0%, 55% { transform: rotate(0); } 80%, 100% { transform: rotate(-14deg) translateX(-4px); } }
@keyframes ex-break-r { 0%, 55% { transform: rotate(0); } 80%, 100% { transform: rotate(14deg) translateX(4px); } }
@keyframes ex-squeeze { to { transform: translateX(0) scaleX(1.06); } }
@keyframes ex-text { 0%, 15% { transform: scale(.55); } 85%, 100% { transform: scale(1.35); } }
@keyframes ex-try { 0%, 15% { transform: translateY(-14px); } 50%, 100% { transform: translateY(4px); } }
@keyframes ex-left { 0%, 15% { transform: translateX(0); } 70%, 100% { transform: translateX(22px); } }
@keyframes ex-right { 0%, 15% { transform: translateX(0); } 70%, 100% { transform: translateX(-22px); } }
@keyframes ex-stick { 0%, 20% { transform: translateY(0); } 30% { transform: translateY(-3px); } 40% { transform: translateY(0); } 50% { transform: translateY(-3px); } 60%, 100% { transform: translateY(0); } }
@keyframes ex-free { 0%, 20% { transform: translateY(0); } 70%, 100% { transform: translateY(-30px); } }
@keyframes ex-hook { 0%, 15% { transform: translateY(0); } 45% { transform: translateY(-14px); } 50% { transform: translateY(-12px); } 55%, 100% { transform: translateY(-14px); } }

/* ------------------------------------------------ как делается */
.how-hud { position: absolute; inset: 0; pointer-events: none; user-select: none; -webkit-user-select: none; }
.how-prog { position: absolute; left: 14px; right: 14px; top: 10px; display: flex; gap: 4px; }
.how-prog i { flex: 1; height: 4px; border-radius: 2px; overflow: hidden; background: color-mix(in srgb, var(--ink) 16%, transparent); }
.how-prog b { display: block; height: 100%; width: calc(var(--p, 0) * 100%); background: var(--accent); }
.stage.on-dark .how-prog i { background: rgb(255 255 255 / 22%); }
.how-cap {
  position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); margin: 0; max-width: calc(100% - 28px);
  display: flex; align-items: baseline; gap: 10px; padding: 8px 16px; border-radius: 999px; white-space: nowrap; overflow: hidden;
  background: color-mix(in srgb, var(--card) 90%, transparent); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); box-shadow: var(--shadow);
}
.how-cap-n { font: 700 .85rem var(--mono); color: var(--accent-ink); font-variant-numeric: tabular-nums; }
.how-cap-t { overflow: hidden; text-overflow: ellipsis; }
.how-swipe { position: absolute; right: 14px; top: 26px; margin: 0; font-size: .78rem; font-weight: 600; color: var(--muted); animation: fade-late .6s 7s forwards; }
@keyframes fade-late { to { opacity: 0; } }
.how-badge {
  position: absolute; left: 14px; top: 24px; display: flex; align-items: center; gap: 10px;
  background: var(--card); border-radius: 999px; padding: 6px 14px 6px 6px; box-shadow: var(--shadow);
}
.how-num { width: 36px; height: 36px; border-radius: 50%; background: var(--ink); color: var(--page); display: grid; place-items: center; font: 700 1.1rem var(--sans); }
.how-ico .pict { width: 34px; height: 34px; }
.pict { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.how-arrow { position: absolute; left: 50%; top: 12%; transform: translateX(-50%); color: var(--accent); }
.how-arrow .pict { width: 54px; height: 54px; stroke-width: 3; animation: bob-up 1.2s ease-in-out infinite alternate; }
.how-arrow[data-dir="down"] .pict { transform: rotate(180deg); animation-name: bob-down; }
@keyframes bob-up { from { translate: 0 6px; } to { translate: 0 -6px; } }
@keyframes bob-down { from { translate: 0 -6px; } to { translate: 0 6px; } }
.how-head { display: grid; gap: 10px; }
.how-route { margin: 0; color: var(--muted); }
.how-route b { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: var(--ink); color: var(--page); margin-right: 4px; }
.how-steps, .relief-steps, .recipe-list { list-style: none; margin: 14px 0; padding: 0; display: grid; gap: 6px; }
.how-step, .recipe-ev {
  width: 100%; display: flex; align-items: center; gap: 12px; text-align: left; padding: 8px 12px; min-height: 52px;
  background: transparent; border: 1px solid transparent; border-radius: var(--radius-sm); cursor: pointer; color: var(--muted);
  transition: background .2s, border-color .2s, color .2s;
}
.how-step .pict, .recipe-ev .pict { width: 30px; height: 30px; flex: none; }
.how-step-n { width: 28px; height: 28px; flex: none; border-radius: 50%; border: 2px solid currentColor; display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.how-step.is-done, .recipe-ev.is-done { color: var(--text); }
.how-step.is-on, .recipe-ev.is-on { background: var(--card); border-color: var(--accent); color: var(--text); box-shadow: var(--shadow); }
.how-step.is-on .how-step-n { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.how-nav { display: flex; gap: 8px; flex-wrap: wrap; }
.how-pick { margin: 0 0 14px; }
.how-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 14px; }
.how-cat {
  width: 100%; height: 100%; display: grid; grid-template-rows: auto auto 1fr; gap: 2px; padding: 0 0 12px; text-align: left; cursor: pointer;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden;
  transition: transform .2s var(--ease), box-shadow .2s, border-color .2s;
}
.how-cat:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--accent); }
.how-cat:active { transform: scale(.98); }
.how-cat-img { position: relative; display: block; aspect-ratio: 1; overflow: hidden; background: var(--stage-bg); }
.how-cat-img img { display: block; width: 100%; height: 100%; object-fit: cover; }
/* нет превью — рисунок вида на контрастном фоне (тёмное изделие — светлый фон) */
.how-cat-img.is-art { display: grid; place-content: center; justify-items: center; gap: 6px; }
.how-cat-img.is-art[data-tone="dark"] { background: radial-gradient(circle at 50% 35%, #4a423b, #1f1c19 75%); }
.how-cat-img.is-art[data-tone="light"] { background: radial-gradient(circle at 50% 35%, #ffffff, #e6dfd4 75%); }
.how-cat-glyph { width: 46%; height: auto; fill: var(--prod); stroke: color-mix(in srgb, var(--prod) 60%, #000); stroke-width: 1.5; stroke-linejoin: round; }
.how-cat-glyph .g-line { fill: none; stroke-width: 2.5; stroke-linecap: round; }
.how-cat-glyph .g-cut { fill: none; stroke-width: 1.5; }
.how-cat-glyph .g-flame { fill: #f2a23c; stroke: none; }
.how-cat-glyph .g-ring { fill: none; stroke: var(--prod); stroke-width: 5; }
.how-cat-img.is-art small { font-size: .72rem; color: var(--muted); }
.how-cat-img.is-art[data-tone="dark"] small { color: #d6ccc0; }
.how-cat-img.is-art[data-tone="light"] small { color: #5a5249; }
.how-cat-name { padding: 10px 12px 0; font: 600 1.05rem/1.2 var(--serif); }
.how-cat-route { padding: 0 12px; font-size: .8rem; color: var(--muted); }
.how-player { display: grid; gap: 14px; align-content: start; }
.hp-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.hp-back { padding-left: 10px; }
.hp-route { margin: 0; font-size: .85rem; color: var(--muted); }
.hp-route b { display: inline-grid; place-items: center; width: 22px; height: 22px; margin-right: 4px; border-radius: 6px; background: var(--ink); color: var(--page); font-size: .75rem; }
.hp-title { margin: 0; font-size: 1.5rem; }
.hp-chips { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.hp-chip {
  width: 100%; display: flex; align-items: center; gap: 12px; min-height: 50px; padding: 8px 12px; text-align: left; cursor: pointer;
  background: transparent; border: 1px solid transparent; border-radius: var(--radius-sm); color: var(--muted);
  transition: background .2s, border-color .2s, color .2s;
}
.hp-chip .pict { width: 28px; height: 28px; flex: none; }
.hp-chip-n { width: 28px; height: 28px; flex: none; display: grid; place-items: center; border-radius: 50%; border: 2px solid currentColor; font-weight: 700; font-size: .85rem; }
.hp-chip.is-done { color: var(--text); }
.hp-chip.is-on { color: var(--text); background: var(--card); border-color: var(--accent); box-shadow: var(--shadow); }
.hp-chip.is-on .hp-chip-n { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.hp-now { display: none; }
.hp-nav { display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; }
.hp-btn { min-height: 52px; font-size: 1.02rem; padding: 0 14px; }
.hp-play { min-width: 128px; }

/* ------------------------------------------------ рецепт
 * Часы (стрелки по минутам документа / кольцо по шагам) + табло: время крупно
 * моноширинными цифрами, этап, прогресс, «зараз / далі». Сеткой, без наложений. */
.recipe-visual {
  position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); align-items: center;
  gap: clamp(14px, 3vw, 28px); padding: clamp(14px, 3vw, 28px);
}
.rc-clock { position: relative; display: grid; place-items: center; min-width: 0; min-height: 0; }
.clock { display: block; width: min(100%, 300px); height: auto; overflow: visible; }
.clock-face { fill: var(--card); stroke: var(--line); stroke-width: 2; }
.clock-track { fill: none; stroke: var(--card-2); stroke-width: 7; }
.clock-ring { fill: none; stroke: var(--accent); stroke-width: 7; stroke-linecap: round; transform: rotate(-90deg); transform-origin: 100px 100px; stroke-dasharray: 0 100; transition: stroke-dasharray .45s var(--ease); }
.tk { stroke: var(--line); stroke-width: 1.5; }
.tk5 { stroke: var(--muted); stroke-width: 3; stroke-linecap: round; }
.hand { transform-box: view-box; transform-origin: 100px 100px; transition: transform .5s var(--spring); }
.hand line { stroke-linecap: round; }
.hand-h line { stroke: var(--ink); stroke-width: 7; }
.hand-m line { stroke: var(--accent); stroke-width: 4; }
.is-playing .hand, .is-playing .clock-ring { transition: none; }
.clock.is-steps .hand { opacity: 0; }
.clock-mark { fill: var(--card); stroke: var(--muted); stroke-width: 2; transition: fill .3s, stroke .3s; }
.clock-mark.is-past { fill: var(--accent); stroke: var(--accent); }
.clock-pin { fill: var(--ink); }
.clock.is-steps .clock-pin { display: none; }
.clock-day { font: 700 15px var(--sans); fill: var(--accent-ink); }
.rc-ring-n { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; font: 700 clamp(1.5rem, 5vw, 2.4rem)/1 var(--mono); font-variant-numeric: tabular-nums; color: var(--text); }
.rc-ring-n:empty { display: none; }
.rc-read { display: grid; gap: 6px; min-width: 0; align-content: center; }
.rc-step { margin: 0; font-size: .82rem; font-weight: 700; color: var(--head); }
.rc-time { margin: 0; display: flex; align-items: baseline; flex-wrap: wrap; column-gap: 8px; line-height: 1; }
.rc-big { font: 700 clamp(2.2rem, 4.6vw, 3.4rem)/1 var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.03em; color: var(--text); }
.rc-unit { font-size: 1rem; font-weight: 600; color: var(--muted); line-height: 1.25; }
.is-word .rc-unit { font: 700 1.6rem/1.1 var(--serif); color: var(--text); }
.no-time .rc-time { display: none; }
.rc-name { margin: 0; font: 600 1.15rem/1.25 var(--serif); }
.rc-prog { display: flex; gap: 4px; margin: 4px 0 2px; }
.rc-prog i { flex: 1; height: 6px; border-radius: 3px; overflow: hidden; background: var(--card-2); box-shadow: inset 0 0 0 1px var(--line); }
.rc-prog b { display: block; height: 100%; width: calc(var(--p, 0) * 100%); background: var(--accent); }
.rc-next { margin: 0; font-size: .9rem; line-height: 1.35; color: var(--muted); }
.rc-tag { margin-right: 6px; font-weight: 700; color: var(--text); }
.curve { width: 100%; max-height: 110px; height: auto; margin-top: 4px; }
.curve-path { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linejoin: round; stroke-dasharray: 5 4; }
.curve-dot { fill: var(--accent); stroke: var(--card); stroke-width: 3; }
.curve-lab { font: 600 15px var(--sans); fill: var(--muted); }
.recipe-bar { display: flex; align-items: center; gap: 14px; margin: 14px 0; }
.recipe-bar .btn { flex: none; min-width: 96px; }
.timeline { position: relative; flex: 1; height: 56px; }
.timeline-rail { position: absolute; left: 10px; right: 10px; top: 18px; height: 6px; border-radius: 999px; background: var(--card-2); box-shadow: inset 0 0 0 1px var(--line); }
.tl-band { position: absolute; top: -5px; height: 16px; border-radius: 999px; background: var(--accent-soft); border: 1px solid var(--accent); opacity: .85; }
.tl-mark { position: absolute; top: -4px; transform: translateX(-50%); }
.tl-mark i { display: block; width: 14px; height: 14px; border-radius: 50%; background: var(--card); border: 2px solid var(--ink); }
.tl-mark b { position: absolute; top: 20px; left: 50%; transform: translateX(-50%); font-size: .7rem; white-space: nowrap; color: var(--muted); font-weight: 600; }
[hidden], svg[hidden] { display: none !important; }
.tl-mark.tl-up b { top: auto; bottom: 20px; }
.tl-mark.tl-l b { left: 0; transform: none; }
.tl-mark.tl-r b { left: auto; right: 0; transform: none; }
.tl-head { position: absolute; top: -10px; width: 4px; height: 26px; margin-left: -2px; background: var(--accent); border-radius: 2px; }
.timeline-scrub { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer; }
.timeline-scrub:focus-visible + * { outline: none; }
.timeline:focus-within .timeline-rail { outline: 3px solid var(--accent); outline-offset: 6px; }
.recipe-ev span { flex: 1; }
.recipe-ev em { font-style: normal; color: var(--accent-ink); font-weight: 700; font-size: .85rem; margin-left: 4px; }
.recipe-ev small { color: var(--muted); }
.recipe-engine { background: var(--card); border: 1px dashed var(--accent); border-radius: var(--radius-sm); padding: 10px 14px; font-size: .92rem; }
.recipe-note { font-size: .85rem; }

/* ------------------------------------------------ напис */
.relief-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: center; padding: 18px; }
.rv-top { display: grid; justify-items: center; gap: 10px; perspective: 900px; }
.rv-disc { position: relative; width: min(100%, 230px); aspect-ratio: 1; transform-style: preserve-3d; transition: transform 1.1s var(--ease); }
.rv-face { position: absolute; inset: 0; border-radius: 50%; display: grid; place-items: center; backface-visibility: hidden; -webkit-backface-visibility: hidden; overflow: hidden; }
.rv-item { background: radial-gradient(circle at 35% 30%, #fbf3e2, var(--wax) 60%, var(--wax-edge)); }
.rv-mold { background: radial-gradient(circle at 60% 30%, #8fbab5, var(--mold) 70%); transform: rotateY(180deg); }
.rv-text { font: 800 clamp(22px, 7vw, 40px) / 1 var(--sans); letter-spacing: .04em; max-width: 80%; text-align: center; overflow-wrap: anywhere; position: relative; z-index: 1; }
.rv-item .rv-text { color: #e9d8b4; }
[data-mode="emboss"] .rv-item .rv-text { text-shadow: -1px -1px 0 #fffaf0, 2px 2px 0 #b59c6c, 3px 4px 6px rgb(0 0 0 / 25%); }
[data-mode="deboss"] .rv-item .rv-text { color: #cdb88d; text-shadow: 1px 1px 0 #fffaf0, -1px -2px 0 #9d8456; }
.rv-mirror { display: inline-block; transform: scaleX(-1); color: #4e7a75; }
[data-mode="emboss"] .rv-mold .rv-text { text-shadow: 1px 1px 0 #a9d2cc, -1px -2px 0 #2f5450; }
[data-mode="deboss"] .rv-mold .rv-text { text-shadow: -1px -1px 0 #a9d2cc, 2px 2px 0 #2f5450, 3px 4px 6px rgb(0 0 0 / 25%); }
.rv-wick { position: absolute; left: 50%; top: 50%; width: 8px; height: 8px; margin: -4px; border-radius: 50%; background: var(--ink); z-index: 2; }
.rv-fill { position: absolute; inset: 0; background: radial-gradient(circle at 40% 35%, #fbf0d8, var(--wax)); opacity: 0; transform: scale(0); border-radius: 50%; transition: transform 1.4s var(--ease), opacity .6s; z-index: 2; }
[data-stage="3"] .rv-fill { opacity: .82; transform: scale(1); }
.rv-cap { font-weight: 700; margin: 0; text-align: center; }
.rv-cut { width: 100%; max-width: 260px; justify-self: center; overflow: visible; }
.cs-mold { opacity: 0; transition: opacity .6s; }
.cs-mold-body { fill: var(--mold); }
.cs-candle { transform-box: view-box; transform-origin: 110px 130px; transition: transform 1.1s var(--ease), opacity .6s; }
.cs-candle-body { fill: var(--wax); stroke: var(--wax-edge); stroke-width: 1.5; }
.cs-wick { stroke: var(--ink); stroke-width: 3; stroke-linecap: round; }
.cs-wax { opacity: 0; transform-box: view-box; transform-origin: 110px 210px; transform: scaleY(0); transition: transform 1.4s var(--ease), opacity .4s; }
.cs-wax-r { fill: var(--wax); }
.cs-lab { font: 600 12px var(--sans); fill: var(--muted); }
.cs-lab-mold { opacity: 0; transition: opacity .4s; }
[data-stage="1"] .cs-mold, [data-stage="2"] .cs-mold, [data-stage="3"] .cs-mold,
[data-stage="1"] .cs-lab-mold, [data-stage="2"] .cs-lab-mold, [data-stage="3"] .cs-lab-mold { opacity: 1; }
[data-stage="1"] .cs-candle { transform: rotate(180deg); }
[data-stage="2"] .cs-candle, [data-stage="3"] .cs-candle { transform: translateY(-190px) rotate(180deg); opacity: 0; }
[data-stage="3"] .cs-wax { opacity: 1; transform: scaleY(1); }
[data-stage="1"] .cs-lab-item, [data-stage="2"] .cs-lab-item, [data-stage="3"] .cs-lab-item { opacity: 0; }
html[data-layout] .relief-visual.on-dark { background: radial-gradient(120% 90% at 50% 20%, #48413a 0%, #1f1c19 72%); color: #f1ebe3; }
.relief-visual.on-dark .cs-lab { fill: #d6ccc0; }
.relief-visual.on-dark .cs-wick { stroke: #1a1714; }
.relief-explain { font-size: 1.05rem; font-weight: 600; min-height: 3em; }
.relief-range { width: 100%; flex: 1; accent-color: var(--accent); }
.relief-bad { color: var(--danger); font-size: .9rem; margin-top: 6px; }
.relief-wick-note { font-size: .88rem; }
.relief-controls .chips { margin-bottom: 4px; }

/* ------------------------------------------------ без движения */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; animation-delay: 0ms !important; transition-duration: 1ms !important; scroll-behavior: auto !important; }
  /* сценки: держим последний, «объясняющий» кадр */
  .ex-x, .ex-x-small, .ex-stuck, .ex-blob { opacity: 1; animation: none !important; }
  .ex-drip, .ex-crack { stroke-dashoffset: 0; animation: none !important; }
  .ex-grow { transform: scale(1.5, 1.15); animation: none !important; }
  .ex-text-grow { transform: scale(1.35); animation: none !important; }
  .ex-lift { transform: translateY(-34px); animation: none !important; }
  .ex-free { transform: translateY(-30px); animation: none !important; }
  .ex-wall-between { opacity: 0; animation: none !important; }
  .ex-left { transform: translateX(22px); animation: none !important; }
  .ex-right { transform: translateX(-22px); animation: none !important; }
  .ex-ok-ring, .ex-ok-tick { stroke-dashoffset: 0; animation: none !important; }
  .ex-pill-ico .pi-mark { stroke-dashoffset: 0; animation: none !important; }
  .spinner { animation: none !important; }
}