/* ==========================================================================
   Палитра строго из трёх цветов. Прозрачности — только этих же цветов.
   Тени жёсткие, скруглений нет, тайминги linear / steps().
   ========================================================================== */
:root {
  --ink: #141414;
  --red: #D62718;
  --paper: #E9E1D0;

  --ink-70: rgba(20, 20, 20, .7);
  --ink-40: rgba(20, 20, 20, .4);
  --ink-15: rgba(20, 20, 20, .15);
  --ink-10: rgba(20, 20, 20, .1);
  --ink-06: rgba(20, 20, 20, .06);
  --paper-60: rgba(233, 225, 208, .6);
  --paper-15: rgba(233, 225, 208, .15);

  --f-head: 'Russo One', 'Oswald', 'Arial Narrow', sans-serif;
  --f-cond: 'Oswald', 'Arial Narrow', sans-serif;
  --f-mono: 'IBM Plex Mono', ui-monospace, 'Courier New', monospace;

  --bar: 44px;
  --gutter: clamp(16px, 4vw, 64px);
  --skew: -6deg;
}

*, *::before, *::after { box-sizing: border-box; border-radius: 0; }

html {
  background: var(--paper);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: 15px;
  line-height: 1.55;
  overflow-x: hidden;
}

a { color: inherit; }
button { font: inherit; color: inherit; }
code { font-family: var(--f-mono); font-size: .92em; background: var(--ink-15); padding: 0 .3em; word-break: break-all; }

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

/* Бумажное зерно: SVG feTurbulence, низкая прозрачность, поверх всего */
.grain {
  position: fixed;
  inset: 0;
  z-index: 95;
  pointer-events: none;
  opacity: .22;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .08 0 0 0 0 .08 0 0 0 0 .08 0 0 0 .5 -.12'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 240px 240px;
}

/* ==========================================================================
   ШАПКА
   ========================================================================== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 80;
  height: var(--bar);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 var(--gutter);
  background: var(--ink);
  color: var(--paper);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  min-width: 0;
}
.brand-mark {
  flex: none;
  width: 18px; height: 18px;
  position: relative;
  overflow: hidden;
  border: 2px solid var(--paper);
}
.brand-mark::after {
  content: '';
  position: absolute;
  left: -4px; top: 5px;
  width: 22px; height: 3px;
  background: var(--red);
  transform: rotate(-45deg);
}
.brand-name {
  font-family: var(--f-head);
  font-size: 15px;
  letter-spacing: .06em;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav { display: flex; gap: clamp(14px, 2.4vw, 36px); height: 100%; }
.nav a {
  display: flex;
  align-items: center;
  height: 100%;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  padding-top: 3px;
  white-space: nowrap;
  transition: border-color .12s steps(2);
}
.nav a:hover { border-bottom-color: var(--paper-60); }
.nav a.is-active { border-bottom-color: var(--red); }

/* ==========================================================================
   01 · ОБЛОЖКА
   ========================================================================== */
.hero {
  position: relative;
  height: 100vh;
  height: 100svh;
  min-height: 600px;
  overflow: hidden;
  isolation: isolate;
  background: var(--paper);
}

.hero-stage {
  position: absolute;
  inset: 0;
  transform-origin: var(--vpx, 68%) var(--vpy, 50%);
  will-change: transform;
}
.hero-layers { position: absolute; inset: 0; }

.layer {
  position: absolute;
  left: 0; top: 0;
  transform-origin: 50% 50%;
  will-change: transform, opacity;
  opacity: 0;
  pointer-events: none;
}
.layer > svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Механизмы внутри слоёв: анимируется только transform */
.mech { position: absolute; will-change: transform; }
.mech > svg { display: block; width: 100%; height: 100%; overflow: visible; }

.mech-spin { animation: spin var(--dur, 12s) linear infinite var(--dir, normal); }
.mech-piston { animation: piston var(--dur, 1.6s) linear infinite alternate; }
.mech-swing { transform-origin: 50% 100%; animation: swing var(--dur, 2.6s) linear infinite alternate; }
.mech-belt { overflow: hidden; will-change: auto; }
.belt-strip {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  will-change: transform;
  animation: belt var(--dur, 1s) linear infinite;
}
.belt-strip > svg { display: block; width: 100%; height: 100%; }

@keyframes spin   { to { transform: rotate(360deg); } }
@keyframes piston { to { transform: translateX(var(--travel, 40px)); } }
@keyframes swing  { from { transform: rotate(calc(var(--amp, 12deg) * -1)); } to { transform: rotate(var(--amp, 12deg)); } }
@keyframes belt   { to { transform: translateX(var(--period, -20px)); } }

/* Центр конструкции: плашка с лозунгом */
.hero-core {
  position: absolute;
  left: 0; top: 0;
  z-index: 5;
  will-change: transform, opacity;
  transform: translate3d(var(--vpx, 68vw), var(--vpy, 50vh), 0) translate(-50%, -50%);
}
.core-deco {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.core-deco > svg { display: block; overflow: visible; }
.core-deco .mech { z-index: 1; }

.hero-plate {
  position: relative;
  z-index: 2;
  background: var(--paper);
  border: 5px solid var(--ink);
  box-shadow: 12px 12px 0 var(--ink);
  padding: clamp(18px, 2vw, 30px) clamp(16px, 2.2vw, 34px) clamp(18px, 2.2vw, 34px);
}
.hero-title {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 400;
  font-size: clamp(34px, 4.3vw, 74px);
  line-height: .98;
  letter-spacing: .01em;
  text-transform: uppercase;
  color: var(--red);
  text-shadow: .06em .06em 0 var(--ink);
  transform: skewX(var(--skew));
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.t-line { display: block; white-space: nowrap; }
.t-accent {
  margin-top: .16em;
  padding: .1em .18em .04em;
  font-size: 1.16em;
  background: var(--ink);
  color: var(--red);
  text-shadow: .05em .05em 0 var(--paper);
}

/* Чертёжный штамп слева */
.hero-stamp {
  position: absolute;
  z-index: 6;
  left: var(--gutter);
  top: 50%;
  transform: translateY(-50%);
  width: min(340px, 27vw);
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
}
.stamp-name {
  padding: 14px 12px 6px;
  font-family: var(--f-head);
  font-size: clamp(22px, 2.2vw, 32px);
  line-height: 1;
  text-transform: uppercase;
  transform: skewX(var(--skew));
  overflow-wrap: anywhere;
}
.stamp-lead { margin: 0; padding: 4px 12px 14px; font-size: 13px; line-height: 1.5; }
.stamp-link {
  display: flex;
  justify-content: space-between;
  padding: 12px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  transition: background-color .12s steps(2), color .12s steps(2);
}
.stamp-link:hover { background: var(--red); color: var(--ink); }
.stamp-link + .stamp-link { border-top: 2px solid var(--paper); }
.stamp-link--red { background: var(--red); color: var(--paper); }
.stamp-link--red:hover { background: var(--ink); color: var(--paper); }

/* ==========================================================================
   ОБЩЕЕ ДЛЯ РАЗДЕЛОВ
   ========================================================================== */
.section {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  overflow: clip;
  padding: calc(var(--bar) + clamp(48px, 7vw, 110px)) var(--gutter) clamp(80px, 10vw, 150px);
  border-top: 5px solid var(--ink);
}
.section-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.section-bg > svg { display: block; width: 100%; height: 100%; }
.section-inner { position: relative; max-width: 1240px; margin: 0 auto; }

.section-head {
  display: flex;
  align-items: flex-end;
  gap: clamp(12px, 2vw, 28px);
  margin-bottom: clamp(40px, 6vw, 84px);
}
.section-index {
  font-family: var(--f-head);
  font-size: clamp(64px, 9vw, 140px);
  line-height: .78;
  color: transparent;
  -webkit-text-stroke: 2px var(--ink);
  flex: none;
}
.section-note {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  border-top: 1px solid var(--ink);
  padding-top: 6px;
  display: inline-block;
  background: var(--paper);
}
.section-title {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 400;
  font-size: clamp(42px, 6.6vw, 104px);
  line-height: .9;
  text-transform: uppercase;
  transform: skewX(var(--skew));
  transform-origin: 0 100%;
  text-shadow: .055em .055em 0 var(--red);
}

/* Кнопки */
.btn-order {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6em;
  padding: 14px 22px;
  background: var(--red);
  color: var(--paper);
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
  font-family: var(--f-head);
  font-size: 18px;
  line-height: 1;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: transform .12s steps(3), box-shadow .12s steps(3);
}
.btn-order:hover, .btn-order:focus-visible { transform: translate(6px, 6px); box-shadow: 0 0 0 var(--ink); }
.btn-order:active { transform: translate(6px, 6px); box-shadow: none; }

.btn-plain {
  padding: 14px 18px;
  background: transparent;
  border: 3px solid var(--ink);
  font-family: var(--f-head);
  font-size: 16px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color .12s steps(2), color .12s steps(2);
}
.btn-plain:hover { background: var(--ink); color: var(--paper); }

/* ==========================================================================
   02 · ПРАЙС
   ========================================================================== */
.price-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(36px, 5vw, 80px);
  align-items: start;
}

.card {
  position: relative;
  padding: clamp(96px, 10vw, 140px) clamp(22px, 3vw, 44px) clamp(22px, 3vw, 40px);
  box-shadow: 14px 14px 0 var(--ink);
}
.card--red { background: var(--red); color: var(--ink); padding-bottom: clamp(40px, 5vw, 72px); }
.card--black { background: var(--ink); color: var(--paper); margin-top: clamp(80px, 12vw, 190px); }

.card-num {
  position: absolute;
  right: clamp(14px, 2vw, 30px);
  top: -.36em;
  font-family: var(--f-head);
  font-size: clamp(120px, 15vw, 230px);
  line-height: 1;
  letter-spacing: -.02em;
  transform: skewX(var(--skew));
  pointer-events: none;
}
.card--red .card-num { color: var(--ink); }
.card--black .card-num { color: var(--red); }

/* Балка-раскос через угол карточки */
.card-beam {
  position: absolute;
  left: -18px;
  top: 34px;
  width: 46%;
  height: 14px;
  transform: rotate(-30deg);
  transform-origin: 0 50%;
  pointer-events: none;
}
.card--red .card-beam { background: var(--ink); }
.card--black .card-beam { background: var(--paper); }

.card-kicker {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-top: 8px;
  border-top: 3px solid currentColor;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.card-title {
  margin: .5em 0 .45em;
  font-family: var(--f-cond);
  font-weight: 700;
  font-size: clamp(26px, 2.8vw, 42px);
  line-height: 1.02;
  text-transform: uppercase;
  transform: skewX(var(--skew));
  overflow-wrap: anywhere;
}
.card-price {
  margin-bottom: .45em;
  font-family: var(--f-head);
  font-size: clamp(48px, 6vw, 92px);
  line-height: .9;
  text-transform: uppercase;
  transform: skewX(var(--skew));
  overflow-wrap: anywhere;
}
.card--red .card-price { text-shadow: .05em .05em 0 var(--paper); }
.card--black .card-price { text-shadow: .05em .05em 0 var(--red); }

.card-list { list-style: none; margin: 0 0 30px; padding: 0; border-top: 1px solid currentColor; }
.card-list li {
  display: grid;
  grid-template-columns: 3em 1fr;
  padding: 11px 0;
  border-bottom: 1px solid currentColor;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
}
.card-list li b { font-weight: 700; }

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px;
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--ink);
}
.card-term { display: flex; flex-direction: column; font-size: 10px; letter-spacing: .16em; text-transform: uppercase; }
.card-term b { font-family: var(--f-head); font-weight: 400; font-size: 22px; letter-spacing: 0; }

/* ==========================================================================
   03 · ДЕМО
   ========================================================================== */
.poster {
  position: relative;
  background: var(--paper);
  border: 5px solid var(--ink);
  box-shadow: 14px 14px 0 var(--ink);
}
.poster-bar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.poster-body { position: relative; overflow: hidden; padding: clamp(26px, 3.4vw, 48px); }
.poster-deco { position: absolute; right: 0; top: 0; width: 46%; height: 62%; pointer-events: none; }
.poster-deco > svg { display: block; width: 100%; height: 100%; }
.poster-body > *:not(.poster-deco) { position: relative; }

.poster-title {
  max-width: 13ch;
  margin: 0 0 30px;
  font-family: var(--f-head);
  font-weight: 400;
  font-size: clamp(34px, 4.4vw, 66px);
  line-height: .95;
  text-transform: uppercase;
  transform: skewX(var(--skew));
  transform-origin: 0 100%;
  text-shadow: .05em .05em 0 var(--red);
  overflow-wrap: anywhere;
}

.status {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 560px;
  margin-bottom: 12px;
  border: 3px solid var(--ink);
  background: var(--paper);
}
.status > div {
  padding: 10px 6px;
  border-right: 3px solid var(--ink);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-align: center;
  text-transform: uppercase;
  opacity: .45;
}
.status > div:last-child { border-right: 0; }
.status > div.is-active { opacity: 1; background: var(--ink); color: var(--paper); }
.status[data-state="done"] > div.is-active { background: var(--red); color: var(--ink); }

.poster-meta {
  min-height: 1.5em;
  margin: 0 0 34px;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.btn-giant {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: 640px;
  padding: clamp(18px, 2.2vw, 30px) clamp(20px, 2.6vw, 36px);
  background: var(--red);
  color: var(--paper);
  border: 4px solid var(--ink);
  box-shadow: 10px 10px 0 var(--ink);
  font-family: var(--f-head);
  font-size: clamp(28px, 3.6vw, 56px);
  line-height: 1;
  text-transform: uppercase;
  text-align: left;
  cursor: pointer;
  transition: transform .12s steps(3), box-shadow .12s steps(3);
}
.btn-giant > span { transform: skewX(var(--skew)); }
.btn-giant .arrow { flex: none; width: 1.5em; height: .75em; fill: currentColor; transition: transform .2s steps(4); }
.btn-giant:hover, .btn-giant:focus-visible { transform: translate(10px, 10px); box-shadow: 0 0 0 var(--ink); }
.btn-giant:hover .arrow { transform: translateX(10px); }

.btn-text {
  margin-top: 22px;
  padding: 2px 0;
  background: none;
  border: 0;
  border-bottom: 1px dashed var(--ink);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  cursor: pointer;
}
.btn-text:hover { color: var(--red); border-bottom-color: var(--red); }
.btn-text[hidden] { display: none; }

/* ==========================================================================
   04 · О КУРСАХ
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 4vw, 64px);
  align-items: start;
}
.about-text {
  background: var(--paper);
  border: 5px solid var(--ink);
  box-shadow: 12px 12px 0 var(--ink);
  padding: clamp(24px, 3vw, 44px);
  font-size: 16px;
}
.about-text p { margin: 0 0 1em; }
.about-text p:last-child { margin-bottom: 0; }
.placeholder {
  display: grid;
  place-items: center;
  min-height: 220px;
  border: 2px dashed var(--ink);
  font-family: var(--f-head);
  font-size: clamp(20px, 2.4vw, 34px);
  text-align: center;
  text-transform: uppercase;
  padding: 20px;
}

.about-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.point {
  position: relative;
  min-height: 170px;
  padding: 16px 16px 18px;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-top-width: 8px;
}
.point:nth-child(2) { border-top-color: var(--red); }
.point-num {
  display: block;
  font-family: var(--f-head);
  font-size: 44px;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
  margin-bottom: 10px;
}
.point-title {
  margin: 0 0 6px;
  font-family: var(--f-cond);
  font-weight: 700;
  font-size: 20px;
  text-transform: uppercase;
}
.point-text { margin: 0; font-size: 13px; }

/* ==========================================================================
   ПОДВАЛ
   ========================================================================== */
.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 26px var(--gutter);
  background: var(--ink);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.footer a { text-decoration: none; border-bottom: 2px solid var(--red); }

/* ==========================================================================
   ОВЕРЛЕЙ КУРСА И ДИАЛОГ
   ========================================================================== */
.course-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  background: var(--ink);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.course-overlay[hidden] { display: none; }
.course-overlay:fullscreen { width: 100vw; height: 100vh; }

.overlay-bar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 14px;
  height: 52px;
  padding-left: 18px;
  color: var(--paper);
  border-bottom: 3px solid var(--red);
}
.overlay-title {
  flex: 1;
  min-width: 0;
  font-family: var(--f-head);
  font-size: 16px;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.overlay-status {
  flex: none;
  padding: 4px 8px;
  border: 1px solid var(--paper);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.overlay-close {
  flex: none;
  height: 100%;
  padding: 0 22px;
  background: var(--red);
  color: var(--paper);
  border: 0;
  font-family: var(--f-head);
  font-size: 16px;
  text-transform: uppercase;
  cursor: pointer;
}
.overlay-close:hover { background: var(--paper); color: var(--ink); }
.overlay-body { position: relative; flex: 1; min-height: 0; background: var(--paper); }
.overlay-body iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }

.dialog {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(20, 20, 20, .78);
}
.dialog[hidden] { display: none; }
.dialog-box {
  width: 100%;
  max-width: 540px;
  background: var(--paper);
  border: 5px solid var(--ink);
  box-shadow: 12px 12px 0 var(--red);
}
.dialog-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 14px;
  background: var(--ink);
  color: var(--paper);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.dialog-x { width: 40px; height: 36px; background: var(--red); color: var(--paper); border: 0; cursor: pointer; }
.dialog-body { padding: 24px; }
.dialog-title {
  margin: 0 0 12px;
  font-family: var(--f-head);
  font-weight: 400;
  font-size: 28px;
  line-height: 1;
  text-transform: uppercase;
  transform: skewX(var(--skew));
}
.dialog-text { margin: 0 0 24px; font-size: 13px; }
.dialog-actions { display: flex; flex-wrap: wrap; gap: 16px; }

/* Блокировка скролла под оверлеем */
html.is-locked, html.is-locked body { overflow: hidden; }
html.is-locked body { position: fixed; left: 0; right: 0; width: 100%; }

/* ==========================================================================
   АДАПТИВ
   ========================================================================== */
@media (max-width: 1100px) {
}

@media (max-width: 759px) {
  :root { --bar: 44px; }
  body { font-size: 14px; }
  .brand-name { font-size: 13px; }
  .nav { gap: 12px; }
  .nav a { font-size: 10px; letter-spacing: .08em; }

  .hero { min-height: 640px; }
  .hero-title { font-size: min(8.6vw, 42px); }
  .hero-plate { padding: 16px 14px 18px; box-shadow: 8px 8px 0 var(--ink); border-width: 4px; }
  .hero-stamp {
    top: auto;
    bottom: 16px;
    left: 16px;
    right: 16px;
    width: auto;
    transform: none;
  }
  .stamp-lead { display: none; }
  .stamp-name { font-size: 22px; padding: 10px 10px 8px; }

  .section-head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .price-grid { grid-template-columns: 1fr; gap: 72px; }
  .card { box-shadow: 10px 10px 0 var(--ink); }
  .card--black { margin-top: 0; }
  .card-list li { font-size: 14px; }

  .about-grid, .about-points { grid-template-columns: 1fr; }
  .point { min-height: 0; }

  .overlay-bar { height: 48px; padding-left: 12px; gap: 8px; }
  .overlay-title { font-size: 13px; }
  .overlay-status { display: none; }
  .overlay-close { padding: 0 14px; font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .mech, .belt-strip { animation: none !important; }
  *, *::before, *::after { transition: none !important; }
}

@media (max-width: 759px) {
  .card-beam { width: 26%; top: 28px; height: 10px; }
  .poster-deco { width: 60%; height: 34%; }
}

/* ==========================================================================
   ДОПОЛНЕНИЯ: пункт «Маркетплейс», плакат демо, третья карточка прайса
   ========================================================================== */
.nav a.nav-market {
  align-self: center;
  height: 28px;
  padding: 0 10px;
  border: 2px solid var(--paper);
  transition: background-color .12s steps(2), color .12s steps(2);
}
.nav a.nav-market:hover, .nav a.nav-market.is-active { background: var(--paper); color: var(--ink); }

.poster { max-width: 900px; margin-left: auto; }

.card-rule { display: block; height: 3px; background: currentColor; }

.card--paper {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 0 clamp(28px, 4vw, 64px);
  align-items: end;
  margin-top: clamp(8px, 2vw, 24px);
  margin-left: clamp(0px, 9vw, 140px);
  padding-top: clamp(84px, 8vw, 112px);
  background: var(--paper);
  color: var(--ink);
  border: 5px solid var(--ink);
}
.card--paper .card-num { color: var(--red); text-shadow: .04em .04em 0 var(--ink); }
.card--paper .card-beam { background: var(--red); }
.card--paper .card-price { color: var(--red); text-shadow: .05em .05em 0 var(--ink); }
.card--paper .card-list { margin-bottom: 0; }
.card--paper .card-side { padding-top: 24px; }
.card-price--text { font-size: clamp(22px, 2.5vw, 40px); line-height: 1; overflow-wrap: normal; }
.card-price-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-shadow: none;
  color: var(--ink);
}

@media (max-width: 759px) {
  .nav { gap: 9px; }
  .nav a { letter-spacing: .03em; }
  .nav a.nav-market { padding: 0 6px; height: 24px; }
  .card--paper { grid-template-columns: 1fr; margin-left: 0; }
  .card-price--text { font-size: 6.4vw; }
}
@media (max-width: 400px) {
  .brand-name { font-size: 12px; letter-spacing: .02em; }
  .brand { gap: 7px; }
  .nav a { font-size: 9.5px; letter-spacing: .02em; }
}

/* ==========================================================================
   МАРКЕТПЛЕЙС — спокойная страница: без фоновых чертежей, наклонов и жёстких теней;
   тонкие линии и подложки цвета чернил, красный — только у действий и активного раздела
   ========================================================================== */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-market .section { border-top: 0; }
.market-head { padding-bottom: clamp(40px, 5vw, 72px); }
.market-head-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(32px, 5vw, 80px);
}
.market-logo { display: block; width: clamp(240px, 26vw, 400px); height: auto; }

.market-title {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 400;
  font-size: clamp(40px, 5.2vw, 76px);
  line-height: 1;
  text-transform: uppercase;
}
.market-lead {
  max-width: 620px;
  margin: 18px 0 clamp(28px, 3vw, 40px);
  font-size: clamp(14px, 1.15vw, 16px);
  line-height: 1.6;
  color: var(--ink-70);
}

.search {
  display: flex;
  max-width: 760px;
  background: var(--paper);
  border: 2px solid var(--ink);
  transition: border-color .15s linear;
}
.search:focus-within { border-color: var(--red); }
.search input {
  flex: 1;
  min-width: 0;
  padding: 14px 16px;
  background: transparent;
  border: 0;
  border-radius: 0;
  outline: none;
  color: var(--ink);
  font: 500 16px var(--f-mono);
  -webkit-appearance: none;
  appearance: none;
}
.search input::placeholder { color: var(--ink-40); }
.search input::-webkit-search-cancel-button { display: none; }
.search-clear {
  flex: none;
  width: 44px;
  background: none;
  border: 0;
  color: var(--ink-70);
  font-size: 16px;
  cursor: pointer;
}
.search-clear:hover { color: var(--red); }
.search-clear[hidden] { display: none; }
.search-btn {
  flex: none;
  padding: 0 22px;
  background: var(--red);
  color: var(--paper);
  border: 0;
  font-family: var(--f-cond);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color .15s linear;
}
.search-btn:hover { background: var(--ink); }

.chips { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 16px; }
.chip {
  padding: 6px 10px;
  background: var(--ink-06);
  border: 0;
  color: var(--ink);
  font: 400 13px var(--f-mono);
  cursor: pointer;
  transition: background-color .15s linear, color .15s linear;
}
.chip:hover, .chip:focus-visible { background: var(--ink); color: var(--paper); }

/* разделы-вкладки, прилипают под шапкой */
.catalog { padding-top: 0; }
.tabs {
  position: sticky;
  top: var(--bar);
  z-index: 20;
  display: flex;
  gap: clamp(20px, 3vw, 40px);
  background: var(--paper);
  border-bottom: 1px solid var(--ink-15);
}
.tab {
  flex: none;
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: -1px;
  padding: 14px 0 12px;
  background: none;
  border: 0;
  border-bottom: 3px solid transparent;
  color: var(--ink-70);
  font-family: var(--f-cond);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: .04em;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  transition: color .15s linear, border-color .15s linear;
}
.tab b { font: 400 12px var(--f-mono); color: var(--ink-40); }
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--red); }
.tab.is-empty { opacity: .45; }

.results-info {
  min-height: 1.6em;
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--ink-70);
}

.group { margin-top: clamp(28px, 3vw, 44px); }
.group-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin-bottom: 20px;
}
.group-title {
  margin: 0;
  font-family: var(--f-cond);
  font-weight: 700;
  font-size: clamp(22px, 2vw, 28px);
  line-height: 1.1;
  text-transform: uppercase;
}
.group-count { font: 400 13px var(--f-mono); color: var(--ink-40); }
.group-more {
  margin-left: auto;
  padding: 0;
  background: none;
  border: 0;
  color: var(--ink-70);
  font: 400 13px var(--f-mono);
  cursor: pointer;
}
.group-more:hover { color: var(--red); }

.market-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

/* карточка курса */
.mcard {
  display: flex;
  flex-direction: column;
  padding: 22px 22px 0;
  background: var(--ink-06);
  border-top: 3px solid var(--ink);
  cursor: pointer;
  transition: background-color .15s linear, border-color .15s linear;
}
.mcard--ready { border-top-color: var(--red); }
.mcard:hover, .mcard:focus-visible { background: var(--ink-10); outline: none; }
.mcard:focus-visible { box-shadow: inset 0 0 0 2px var(--red); }
.mcard-topic {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-70);
}
.mcard-title {
  margin: 0 0 10px;
  font-family: var(--f-cond);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.15;
  text-transform: uppercase;
}
.mcard-text { flex: 1; margin: 0 0 16px; font-size: 14px; line-height: 1.55; color: var(--ink-70); }
.mcard-tags { display: flex; flex-wrap: wrap; gap: 6px 12px; margin: 0 0 16px; padding: 0; list-style: none; font-size: 12px; color: var(--ink-70); }
.mcard-tags:empty { display: none; }
.mcard-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 12px;
  padding: 14px 0 18px;
  border-top: 1px solid var(--ink-15);
}
.mcard-meta { font-size: 12px; color: var(--ink-70); }
.mcard-price { font-family: var(--f-cond); font-weight: 700; font-size: 18px; text-transform: uppercase; }

mark { background: var(--red); color: var(--paper); padding: 0 .08em; }

/* пустой результат */
.empty {
  margin-top: 28px;
  max-width: 720px;
  padding: clamp(22px, 3vw, 36px);
  background: var(--ink-06);
}
.empty-title {
  margin: 0 0 10px;
  font-family: var(--f-cond);
  font-weight: 700;
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.1;
  text-transform: uppercase;
}
.empty-text { margin: 0 0 12px; color: var(--ink-70); }
.empty .chips { margin-top: 8px; }
.empty-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--ink-15);
}
.empty-cta p { margin: 0; font-weight: 500; }

/* кнопки и окно курса */
.page-market .btn-order {
  padding: 14px 20px;
  border: 0;
  box-shadow: none;
  font-family: var(--f-cond);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: .06em;
  transition: background-color .15s linear;
}
.page-market .btn-order:hover, .page-market .btn-order:focus-visible,
.page-market .btn-order:active { transform: none; box-shadow: none; background: var(--ink); }
.page-market .btn-plain {
  padding: 12px 18px;
  border: 2px solid var(--ink);
  font-family: var(--f-cond);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: .06em;
  transition: background-color .15s linear, color .15s linear;
}

.page-market .dialog { background: rgba(20, 20, 20, .6); }
.page-market .dialog-box { border: 0; box-shadow: none; }
.page-market .dialog-bar {
  padding: 0 0 0 24px;
  background: none;
  color: var(--ink-70);
  border-bottom: 1px solid var(--ink-15);
  font-size: 12px;
  letter-spacing: .08em;
}
.page-market .dialog-x { width: 48px; height: 48px; background: none; color: var(--ink); font-size: 16px; }
.page-market .dialog-x:hover { color: var(--red); }

.course-box { max-width: 820px; max-height: calc(100vh - 32px); max-height: calc(100dvh - 32px); display: flex; flex-direction: column; }
.course-box .dialog-body { overflow-y: auto; padding: clamp(20px, 3vw, 32px); }
.cd-topic {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-70);
}
.cd-title {
  margin: 0 0 14px;
  font-family: var(--f-cond);
  font-weight: 700;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.08;
  text-transform: uppercase;
}
.cd-text { margin: 0 0 24px; font-size: 15px; line-height: 1.6; color: var(--ink-70); }
.cd-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 28px; margin-bottom: 28px; }
.cd-program { list-style: none; margin: 0; padding: 0; }
.cd-program li { display: grid; grid-template-columns: 2.4em 1fr; padding: 10px 0; border-bottom: 1px solid var(--ink-15); font-size: 14px; }
.cd-program li:first-child { padding-top: 0; }
.cd-program b { font: 400 13px var(--f-mono); color: var(--red); }
.cd-meta { margin: 0; padding: 4px 16px; background: var(--ink-06); align-self: start; }
.cd-meta > div { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--ink-15); }
.cd-meta > div:last-child { border-bottom: 0; }
.cd-meta dt { font-size: 12px; color: var(--ink-70); align-self: center; }
.cd-meta dd { margin: 0; font-weight: 700; text-align: right; }

@media (max-width: 900px) {
  .market-head-grid { grid-template-columns: minmax(0, 1fr); }
  .market-logo { grid-row: 1; width: min(280px, 70%); }
}
@media (max-width: 759px) {
  .search-btn { padding: 0 16px; }
  .tabs { overflow-x: auto; scrollbar-width: none; gap: 22px; }
  .tabs::-webkit-scrollbar { display: none; }
  .market-grid { grid-template-columns: 1fr; }
  .cd-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   «О КУРСАХ»: плакат с группой рабочих
   ========================================================================== */
.about-grid {
  grid-template-columns: 1.35fr 1fr;
  grid-template-areas: "crew text" "points points";
  align-items: end;
  row-gap: clamp(44px, 5vw, 72px);
}
.crew {
  grid-area: crew;
  position: relative;
  margin: 0;
  aspect-ratio: 2134 / 1494;
}
.crew-bg { position: absolute; inset: 0; overflow: hidden; }
.crew-bg > svg { display: block; width: 100%; height: 100%; }
.crew-img {
  position: absolute;
  left: 0;
  bottom: 0;
  display: block;
  width: 100%;
  height: auto;
}
.crew-plinth {
  position: absolute;
  left: -3%;
  right: -3%;
  bottom: 0;
  height: max(14px, 3.4%);
  background: var(--ink);
  box-shadow: 0 10px 0 var(--red);
}
.about-grid .about-text { grid-area: text; align-self: end; }
.about-grid .about-points { grid-area: points; grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1100px) {
  .about-grid { grid-template-columns: 1fr; grid-template-areas: "crew" "text" "points"; }
  .about-grid .about-points { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 759px) {
  .about-grid .about-points { grid-template-columns: 1fr; }
  .crew-plinth { left: -16px; right: -16px; }
}

/* ==========================================================================
   ФИГУРЫ В ПРАЙСЕ И ДЕМО: стоят за краем карточки / плаката
   ========================================================================== */
.card--figure { --fig-h: clamp(240px, 25vw, 380px); }
.card-figure {
  position: absolute;
  z-index: -1;                      /* позади карточки: она закрывает обрез по низу */
  right: 8%;
  bottom: calc(100% - 34px);
  height: var(--fig-h);
  pointer-events: none;
}
.card-figure img { display: block; height: 100%; width: auto; }
.card--figure .card-num { right: auto; left: clamp(14px, 2vw, 30px); }
.card--figure .card-beam { display: none; }

.demo-stage { position: relative; }
.demo-stage .poster { z-index: 1; }
.demo-figure {
  position: absolute;
  z-index: 0;
  left: 0;
  bottom: 0;
  width: min(calc(100% - 810px), 440px);
  pointer-events: none;
}
.demo-figure img { display: block; width: 100%; height: auto; }
.demo-figure::after {                /* постамент, как у группы в «О курсах» */
  content: '';
  position: absolute;
  left: -14px;
  right: -60px;
  bottom: 0;
  height: 16px;
  background: var(--ink);
  box-shadow: 0 10px 0 var(--red);
}

@media (max-width: 1180px) {
  .demo-stage { --fig-h: clamp(220px, 34vw, 340px); padding-top: calc(var(--fig-h) - 40px); }
  .demo-figure { left: auto; right: 6%; top: 0; bottom: auto; width: auto; height: var(--fig-h); }
  .demo-figure img { height: 100%; width: auto; }
  .demo-figure::after { display: none; }
}
@media (max-width: 759px) {
  .card--figure { --fig-h: 240px; margin-top: calc(var(--fig-h) - 34px - 72px + 24px); }
  .card-figure { right: 6%; }
}

/* ==========================================================================
   ЛОГОТИП, ГРУППА НАД ЛОЗУНГОМ, ЛЕВЫЙ БЛОК ОБЛОЖКИ
   ========================================================================== */
/* малый логотип: чёрный квадрат, светло-бежевая рамка, красная диагональ */
.brand-mark { background: var(--ink); }

/* группа рабочих стоит на плашке с лозунгом */
.core-crew {
  position: absolute;
  z-index: 1;                       /* над декором, под плашкой: обрез по низу закрыт плашкой */
  left: 50%;
  bottom: calc(100% - var(--overlap, 26px));
  transform: translateX(-50%);
  display: block;
  height: auto;
  pointer-events: none;
}

/* левый блок: большой логотип, подпись, кнопка — растут вместе с шириной экрана */
.hero-stamp { width: clamp(260px, 34vw, 600px); border-width: 3px; box-shadow: 10px 10px 0 var(--ink); }
.logo-big { display: block; width: 100%; height: auto; }
.hero-stamp .stamp-lead {
  margin: 0;
  padding: clamp(14px, 1.4vw, 24px) clamp(14px, 1.5vw, 26px) clamp(16px, 1.6vw, 28px);
  border-top: 3px solid var(--ink);
  font-size: clamp(13px, 1.12vw, 19px);
  line-height: 1.5;
}
.hero-stamp .stamp-lead b { display: block; margin-top: .45em; font-weight: 700; }
.hero-stamp .stamp-link--red { padding: clamp(14px, 1.4vw, 24px) clamp(14px, 1.5vw, 26px); font-size: clamp(14px, 1.2vw, 20px); }

/* «О курсах»: вертикальная фигура уже, текст шире */
.about-grid { grid-template-columns: minmax(0, .8fr) minmax(0, 1fr); }

@media (max-width: 759px) {
  .hero-stamp {
    width: auto;
    display: grid;
    grid-template-columns: 50% 1fr;
    align-items: stretch;
    border-width: 2px;
    box-shadow: 6px 6px 0 var(--ink);
  }
  .logo-big { grid-row: 1; grid-column: 1; height: 100%; background: var(--ink); }   /* текст выше логотипа — поля того же цвета */
  .hero-stamp .stamp-lead {
    display: block;
    grid-row: 1;
    grid-column: 2;
    border-top: 0;
    border-left: 2px solid var(--ink);
    padding: 10px 12px;
    font-size: 12px;
    line-height: 1.4;
  }
  .hero-stamp .stamp-lead b { margin-top: 4px; }
  .hero-stamp .stamp-link--red { grid-column: 1 / -1; padding: 14px 12px; font-size: 14px; }
}

/* карточка с фигурой ниже: голова не упирается в длинный заголовок раздела */
.price-grid .card--figure { margin-top: clamp(150px, 19vw, 290px); }
@media (max-width: 759px) {
  .price-grid .card--figure { margin-top: calc(var(--fig-h) - 34px - 72px + 24px); }
}

/* ==========================================================================
   ДЕМО: плакат в исходном масштабе (заголовок и большая кнопка — как у плаката и карточек прайса),
   между ними — описание слева и кадр справа
   ========================================================================== */
.poster--demo .poster-title {
  max-width: none;
  font-size: clamp(28px, 4.4vw, 66px);    /* как у .poster-title; на телефоне — чтобы «СТРОЙПЛОЩАДКЕ» влезло целым словом */
  overflow-wrap: normal;
}
.demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(22px, 3vw, 44px);
  align-items: center;           /* кадр в своих пропорциях (почти с высоту текста) — по центру относительно текста */
  margin-bottom: 36px;
}
.demo-lead { margin: 0 0 18px; font-size: clamp(14px, 1.15vw, 17px); line-height: 1.5; font-weight: 700; }
.demo-list { margin: 0; padding: 0; list-style: none; }
.demo-list li {
  position: relative;
  margin: 0 0 10px;
  padding-left: 22px;
  font-size: clamp(13px, 1.05vw, 15px);
  line-height: 1.5;
}
.demo-list li::before {              /* красный квадрат-маркер */
  content: '';
  position: absolute;
  left: 0;
  top: .5em;
  width: 10px;
  height: 10px;
  background: var(--red);
  box-shadow: 2px 2px 0 var(--ink);
}
.demo-shot { margin: 0; }
.demo-shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 4px solid var(--ink);
  box-shadow: 10px 10px 0 var(--red);
  background: var(--ink);
}
.demo-shot figcaption { margin-top: 18px; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-70); }
a.btn-giant { text-decoration: none; }
.poster--demo .btn-giant { max-width: none; }   /* кнопка — во всю ширину плаката */
.btn-giant .demo-note {
  margin-left: auto;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  opacity: .8;
  transform: none;
}

@media (max-width: 759px) {
  .demo-grid { grid-template-columns: 1fr; margin-bottom: 30px; }
  .demo-shot { order: -1; }
  .btn-giant .demo-note { display: none; }
}

/* страница плеера: курс на всё окно под узкой полосой */
.player-page { margin: 0; height: 100vh; height: 100dvh; display: flex; flex-direction: column; overflow: hidden; background: var(--ink); }
.player-bar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 18px;
  height: var(--bar);
  padding: 0 var(--gutter);
  background: var(--ink);
  color: var(--paper);
  border-bottom: 3px solid var(--red);
}
.player-bar .brand { color: var(--paper); text-decoration: none; }
.player-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  font-family: var(--f-cond);
  font-size: 15px;
  letter-spacing: .06em;
  text-transform: uppercase;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.player-status { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; opacity: .8; }
.player-status[data-state="done"] { color: var(--red); opacity: 1; font-weight: 700; }
.player-back {
  padding: 4px 10px;
  border: 2px solid var(--paper);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
}
.player-back:hover, .player-back:focus-visible { background: var(--paper); color: var(--ink); }
.player-body { flex: 1; min-height: 0; background: #F6F0E5; }
.player-body iframe { display: block; width: 100%; height: 100%; border: 0; }
@media (max-width: 759px) {
  .player-bar .brand-name, .player-status { display: none; }
  .player-title { font-size: 13px; }
}

/* «О курсах»: справа от фигуры — текст сверху и пункты 2×2 под ним, колонка во всю высоту фигуры
   (раньше текст прижимался к низу фигуры, над ним оставалась пустота до заголовка) */
@media (min-width: 1101px) {
  .about-grid {
    grid-template-areas: "crew text" "crew points";
    grid-template-rows: auto 1fr;
    align-items: start;
    row-gap: clamp(24px, 2.4vw, 34px);
  }
  .about-grid .crew { align-self: end; }
  .about-grid .about-text { align-self: start; }
  .about-grid .about-points { grid-template-columns: 1fr 1fr; align-self: end; }
  .about-grid .point { min-height: 0; }
}
/* планшет: фигура и текст рядом, пункты 2×2 снизу; телефон — одна колонка
   (правило «.8fr / 1fr» выше перебивало одноколоночную раскладку, и раздел сжимался в левую колонку) */
@media (min-width: 760px) and (max-width: 1100px) {
  .about-grid {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1fr);
    grid-template-areas: "crew text" "points points";
    align-items: end;
  }
  .about-grid .about-points { grid-template-columns: 1fr 1fr; }
  .about-grid .point { min-height: 0; }
}
@media (max-width: 759px) {
  .about-grid { grid-template-columns: minmax(0, 1fr); grid-template-areas: "crew" "text" "points"; }
}

/* Демо на средних и узких экранах: рабочий стоит вровень с заголовком «02 Демо» (слева от него — заголовок),
   а не над плакатом с пустотой слева */
@media (max-width: 1180px) {
  .demo-stage { --lift: clamp(70px, 12vw, 130px); padding-top: max(0px, calc(var(--fig-h) - 40px - var(--lift))); }
  .demo-figure { top: calc(-1 * var(--lift)); }
}

/* ==========================================================================
   ШАПКА: на компьютере крупнее; на телефоне после начала прокрутки пункты
   складываются в кнопку-гамбургер, по ней — выпадающее меню (main.js, initMenu)
   ========================================================================== */
.nav-toggle { display: none; }
.player-page { --bar: 44px; }   /* у плеера демо шапка остаётся низкой — место курсу */

@media (min-width: 760px) {
  :root { --bar: 64px; }
  .topbar .brand { gap: 12px; }
  .topbar .brand-mark { width: 24px; height: 24px; }
  .topbar .brand-mark::after { left: -5px; top: 8px; width: 30px; height: 4px; }
  .topbar .brand-name { font-size: 20px; }
  .nav { gap: clamp(24px, 3vw, 48px); }
  .nav a { padding-top: 4px; border-bottom-width: 4px; font-size: 15px; letter-spacing: .12em; }
  .nav a.nav-market { height: 40px; padding: 0 16px; border-bottom-width: 2px; }
}

@media (max-width: 759px) {
  .nav-toggle {
    position: relative;
    flex: none;
    width: 44px;
    height: 44px;
    margin-right: -11px;
    padding: 0;
    background: none;
    border: 0;
    color: var(--paper);
    cursor: pointer;
  }
  .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
    position: absolute;
    width: 22px;
    height: 2px;
    background: currentColor;
    transition: transform .18s linear, background-color .18s linear;
  }
  .nav-toggle span { left: 11px; top: 21px; }
  .nav-toggle span::before, .nav-toggle span::after { content: ''; left: 0; }
  .nav-toggle span::before { top: -7px; }
  .nav-toggle span::after { top: 7px; }
  .topbar.is-open .nav-toggle span { background: transparent; }
  .topbar.is-open .nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
  .topbar.is-open .nav-toggle span::after { transform: translateY(-7px) rotate(-45deg); }

  .topbar.is-compact .nav-toggle { display: block; animation: menu-fold .2s linear; }
  .topbar.is-compact .nav {
    position: fixed;
    top: var(--bar);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    height: auto;
    padding: 0 var(--gutter) 8px;
    background: var(--ink);
    border-bottom: 3px solid var(--red);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
  }
  .topbar.is-compact.is-open .nav {
    visibility: visible;
    opacity: 1;
    transform: none;
    transition: opacity .18s linear, transform .18s linear;
  }
  .topbar.is-compact .nav a,
  .topbar.is-compact .nav a.nav-market {
    height: 54px;
    padding: 0;
    background: none;
    border: 0;
    color: var(--paper);
    font-size: 14px;
    letter-spacing: .12em;
    align-self: stretch;
  }
  .topbar.is-compact .nav a + a,
  .topbar.is-compact .nav a + a.nav-market { border-top: 1px solid var(--paper-15); }
  .topbar.is-compact .nav a.is-active::before {
    content: '';
    width: 8px;
    height: 8px;
    margin-right: 12px;
    background: var(--red);
  }
}
@keyframes menu-fold { from { opacity: 0; transform: rotate(-90deg) scale(.5); } }
@media (prefers-reduced-motion: reduce) { .nav-toggle { animation: none !important; } }