/* ==========================================================================
   Кубик Рубика — лендинг в стиле Apple
   Mobile-first: базовые стили для iPhone, медиазапросы расширяют до iPad/desktop
   ========================================================================== */

:root {
  /* Основа */
  --black: #000;
  --white: #fff;
  --fg: #f5f5f7;
  --fg-dark: #1d1d1f;
  --muted: #86868b;
  --muted-dark: #6e6e73;
  --line: rgba(255, 255, 255, 0.1);
  --line-dark: rgba(0, 0, 0, 0.08);
  --surface-dark: #f5f5f7;

  /* Цвета граней — неоновые/пастельные акценты */
  --c-white: #f5f5f7;
  --c-yellow: #ffe066;
  --c-red: #ff5f6d;
  --c-orange: #ffb35c;
  --c-green: #5cf2a5;
  --c-blue: #5eb8ff;

  /* Типографика */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  /* Ритм */
  --gutter: 20px;
  --max: 1120px;
  --radius: 28px;
  --nav-h: 52px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--black);
  color: var(--fg);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.022em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
::selection { background: rgba(94, 184, 255, 0.35); }

/* Lenis (smooth scroll) */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-smooth [data-lenis-prevent] { overscroll-behavior: contain; }
.lenis.lenis-stopped { overflow: hidden; }

/* ---------- Утилиты ---------- */
main { position: relative; z-index: 1; overflow-x: clip; }

.container {
  width: 100%;
  max-width: calc(var(--max) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(2.25rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.muted { color: var(--muted); }

.gradient-text {
  background: linear-gradient(100deg, var(--c-blue) 0%, var(--c-green) 30%, var(--c-yellow) 55%, var(--c-orange) 75%, var(--c-red) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Начальное состояние для fade-in (снимается GSAP) */
.js [data-reveal] { opacity: 0; transform: translateY(50px); }

/* ==========================================================================
   Навигация — матовое стекло
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--nav-h);
  padding-top: env(safe-area-inset-top);
  box-sizing: content-box;
  background: rgba(0, 0, 0, 0.62);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.5s var(--ease), color 0.5s var(--ease), border-color 0.5s var(--ease);
}
.nav.is-light {
  background: rgba(255, 255, 255, 0.72);
  color: var(--fg-dark);
  border-bottom-color: var(--line-dark);
}
.nav__inner {
  height: 100%;
  max-width: calc(var(--max) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav__logo { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; }
.nav__links { display: none; gap: 32px; font-size: 13px; }
.nav__links a { opacity: 0.8; transition: opacity 0.2s; }
.nav__links a:hover { opacity: 1; }
.nav__cta {
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 980px;
  border: 1px solid currentColor;
  opacity: 0.9;
  transition: opacity 0.2s, background-color 0.2s;
}
.nav__cta:hover { opacity: 1; }

/* ==========================================================================
   3D-холст
   ========================================================================== */
.cube-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
}

/* ==========================================================================
   1. Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}
.hero__content {
  padding-top: calc(var(--nav-h) + 11svh);
  text-align: center;
}
.hero__title {
  font-size: clamp(2.6rem, 11vw, 6.75rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.04em;
  text-wrap: balance;
}
.hero__lead {
  max-width: 34ch;
  margin: 20px auto 0;
  font-size: clamp(1.05rem, 2.6vw, 1.4rem);
  line-height: 1.4;
  color: var(--muted);
  text-wrap: balance;
}
.hero__hint {
  position: absolute;
  left: 50%;
  bottom: max(24px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero__hint i {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--muted), transparent);
  animation: hint 2s var(--ease) infinite;
  transform-origin: top;
}
@keyframes hint {
  0% { transform: scaleY(0); opacity: 1; }
  60% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

/* ---------- Манифест ---------- */
.statement { padding-block: 22vh; }
.statement__text {
  max-width: 22ch;
  font-size: clamp(1.75rem, 6vw, 4rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.03em;
}
.statement__text .w { opacity: 0.18; }

/* ==========================================================================
   2. История — залипающая секция
   ========================================================================== */
.history__track { position: relative; height: 420vh; }
.history__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  overflow: hidden;
}
.history__bg {
  position: absolute;
  inset: 0;
  background: #071a2e;
  transition: background-color 0.9s var(--ease);
}
.history__bg::after {
  /* мягкий виньетирующий свет */
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 80% at 70% 40%, rgba(255, 255, 255, 0.06), transparent 60%),
              linear-gradient(to bottom, rgba(0, 0, 0, 0.35), transparent 30%, transparent 70%, rgba(0, 0, 0, 0.5));
}
.history__grid {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding-top: calc(var(--nav-h) + 16px);
  padding-bottom: max(28px, env(safe-area-inset-bottom));
}
.history__visual {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  place-items: center;
}
.slide {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 0.8s var(--ease), transform 1.2s var(--ease);
}
.slide.is-active { opacity: 1; transform: none; }
.slide svg { width: 100%; height: 100%; max-width: 520px; max-height: 520px; overflow: visible; }

/* Рисование линий: pathLength="1" + dashoffset */
.slide .draw {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 1.6s cubic-bezier(0.65, 0, 0.35, 1) var(--d, 0s);
}
.slide.is-active .draw { stroke-dashoffset: 0; }
.slide .fill { fill-opacity: 0; transition: fill-opacity 0.9s ease calc(var(--d, 0s) + 0.5s); }
.slide.is-active .fill { fill-opacity: 1; }
.slide .label { opacity: 0; transition: opacity 0.8s ease 0.9s; }
.slide.is-active .label { opacity: 1; }
.slide .orbit { transform-origin: 200px 200px; animation: orbit 24s linear infinite; }
.slide .orbit--rev { animation-direction: reverse; animation-duration: 36s; }
@keyframes orbit { to { transform: rotate(360deg); } }

.history__text { flex: 0 0 auto; }
/* шаги лежат в одной ячейке грида — контейнер растёт по самому высокому */
.history__steps { display: grid; }
.history__step {
  grid-area: 1 / 1;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.8s var(--ease);
  pointer-events: none;
}
.history__step.is-active { opacity: 1; transform: none; pointer-events: auto; }
.history__year {
  display: block;
  font-size: clamp(3.25rem, 14vw, 8.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.05em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.history__step h2 {
  margin-top: 6px;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}
.history__step p {
  margin-top: 10px;
  max-width: 44ch;
  font-size: 15px;
  color: rgba(245, 245, 247, 0.72);
}
.history__progress { display: flex; gap: 6px; margin-top: 18px; }
.history__progress span {
  width: 24px;
  height: 3px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.18);
  transition: background-color 0.4s, width 0.6s var(--ease);
}
.history__progress span.is-active { width: 48px; background: var(--fg); }

/* ==========================================================================
   3. Механика
   ========================================================================== */
.mech { position: relative; padding-top: 18vh; }
.mech > .section-head { padding-bottom: 14vh; }
.section-head { text-align: center; }
.section-head--left { text-align: left; }
.mech__track { position: relative; height: 480vh; }
.mech__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
}
.mech__steps {
  position: absolute;
  left: 0;
  right: 0;
  bottom: max(28px, env(safe-area-inset-bottom));
  min-height: 12.5rem;
}
.mech__step {
  position: absolute;
  inset: auto var(--gutter) 0;
  padding: 22px 22px 24px;
  border-radius: 22px;
  background: rgba(22, 22, 24, 0.55);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid var(--line);
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease), transform 0.8s var(--ease);
}
.mech__step.is-active { opacity: 1; transform: none; }
.mech__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.mech__step h3 {
  margin-top: 6px;
  font-size: clamp(1.5rem, 4.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
}
.mech__step p { margin-top: 10px; font-size: 15px; color: rgba(245, 245, 247, 0.72); }

.specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  padding-block: 10vh 22vh;
}
.spec {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 28px 4px;
  border-top: 1px solid var(--line);
}
.spec__value {
  font-size: clamp(3rem, 12vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.spec__value small { font-size: 0.32em; letter-spacing: 0; margin-left: 4px; color: var(--muted); font-weight: 600; }
.spec__label { font-size: 14px; color: var(--muted); max-width: 18ch; }

/* ==========================================================================
   4. Культурный код — светлая секция
   ========================================================================== */
.culture {
  position: relative;
  background: var(--white);
  color: var(--fg-dark);
  padding-block: 18vh 16vh;
}
.culture .eyebrow { color: var(--muted-dark); }
.culture .section-title { max-width: 16ch; }

.bignum { margin-top: 10vh; }
.bignum__value {
  display: block;
  font-size: clamp(1.7rem, 7.4vw, 6rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.045em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(100deg, #0a84ff, #30d158 40%, #ff9f0a 70%, #ff453a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-wrap: balance;
}
.bignum__label {
  display: block;
  margin-top: 14px;
  max-width: 40ch;
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  color: var(--muted-dark);
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 10vh;
}
.card {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: 30px 26px 32px;
  border-radius: var(--radius);
  background: var(--surface-dark);
  border: 1px solid var(--line-dark);
}
.card::before {
  /* акцентное свечение цветом грани */
  content: "";
  position: absolute;
  z-index: -1;
  width: 280px;
  height: 280px;
  top: -140px;
  right: -100px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.45;
  filter: blur(70px);
}
.card__kicker {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted-dark);
}
.card h3 {
  margin-top: 10px;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.035em;
}
.card p:not(.card__kicker) { margin-top: 12px; font-size: 16px; color: #424245; }

.bars { display: grid; gap: 14px; margin-top: 28px; }
.bar {
  display: grid;
  grid-template-columns: 56px 1fr 64px;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
.bar__year { color: var(--muted-dark); }
.bar__val { text-align: right; font-weight: 600; }
.bar__track { height: 10px; border-radius: 10px; background: rgba(0, 0, 0, 0.06); overflow: hidden; }
.bar__fill {
  display: block;
  height: 100%;
  width: calc(var(--v) * 100%);
  min-width: 10px;
  border-radius: inherit;
  background: linear-gradient(90deg, #30d158, #0a84ff);
  transform-origin: left;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 16px;
  margin-top: 12vh;
}
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__value {
  font-size: clamp(2rem, 7vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stat__label { font-size: 14px; color: var(--muted-dark); max-width: 20ch; }

/* ==========================================================================
   5. Footer
   ========================================================================== */
.footer {
  position: relative;
  z-index: 1;
  background: var(--black);
  border-top: 1px solid var(--line);
  padding-block: 48px max(48px, env(safe-area-inset-bottom));
  font-size: 13px;
  color: var(--muted);
}
.footer__inner { display: flex; flex-direction: column; gap: 18px; }
.footer__brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 600; font-size: 15px; }
.footer__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 10px 16px;
  border-radius: 980px;
  border: 1px solid var(--line);
  color: var(--fg);
  transition: background-color 0.2s, border-color 0.2s;
}
.footer__link:hover { background: rgba(255, 255, 255, 0.06); border-color: rgba(255, 255, 255, 0.2); }

/* ==========================================================================
   iPad и шире
   ========================================================================== */
@media (min-width: 768px) {
  :root { --gutter: 40px; }
  .nav__links { display: flex; }
  .history__step p, .mech__step p { font-size: 17px; }
  .specs { grid-template-columns: repeat(4, 1fr); }
  .cards { grid-template-columns: repeat(3, 1fr); }
  .card--wide { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 44px; }
  .card--wide .bars { margin-top: 0; }
  .stats { grid-template-columns: repeat(4, 1fr); }
  .footer__inner { flex-direction: row; align-items: center; justify-content: space-between; }
}

/* Горизонтальная раскладка sticky-секций (iPad landscape / desktop) */
@media (min-width: 1024px) and (min-aspect-ratio: 1/1) {
  .history__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 48px;
    padding-bottom: 0;
  }
  .history__visual { order: 2; height: 72vh; }
  .history__text { order: 1; }
  .mech__steps { top: 0; bottom: 0; display: flex; align-items: center; }
  .mech__step {
    inset: 50% auto auto var(--gutter);
    width: min(420px, 38vw);
    transform: translateY(calc(-50% + 30px));
    padding: 32px;
  }
  .mech__step.is-active { transform: translateY(-50%); }
  .hero__content { padding-top: calc(var(--nav-h) + 6vh); }
}

/* ==========================================================================
   Уважение к reduced motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}