/* =========================================================
   Vela 14 — стили
   Без класса .live на <html> страница — обычный статичный текст.
   Класс .live добавляет js/main.js, когда 3D-сцена готова.
   ========================================================= */
:root {
  --black: #000;
  --ink: #0b0b0d;
  --mist: #a1a6ad;
  --soft: #d2d5da;
  --white: #f5f5f7;
  --copper: #f0a06a;
  --line: rgba(245, 245, 247, 0.16);

  --display: "Inter Tight", "Inter", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --gutter: clamp(20px, 4vw, 64px);
  --bar: 56px;
}

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

html { -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-stopped { overflow: hidden; }

body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font: 400 1.0625rem/1.5 var(--body);
  -webkit-font-smoothing: antialiased;
}

h1, h2, p, ol, ul, dl, dd { margin: 0; }
ol, ul { padding: 0; list-style: none; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--white); outline-offset: 3px; border-radius: 3px; }
::selection { background: rgba(240, 160, 106, 0.4); }

/* ---------- Шапка ---------- */
.top {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  height: var(--bar);
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 32px);
  background: linear-gradient(rgba(0, 0, 0, 0.82), rgba(0, 0, 0, 0));
}
.wordmark {
  font: 700 1.25rem/1 var(--display);
  letter-spacing: -0.01em;
  text-decoration: none;
}
.top-link {
  margin-left: auto;
  font-size: 0.875rem;
  color: var(--soft);
  text-decoration: none;
  white-space: nowrap;
}
.top-link:hover { color: var(--white); }

.rail, .rail-now { display: none; }
.live .rail { display: block; flex: 1 1 0; max-width: 440px; margin-left: auto; }
.live .rail ol { display: flex; gap: 4px; }
.live .rail li { flex: 1 1 0; }
.live .rail a { display: block; padding: 14px 0; }
.live .rail a::before {
  content: "";
  display: block;
  height: 2px;
  border-radius: 1px;
  background: rgba(245, 245, 247, 0.22);
  transition: background-color 0.3s;
}
.live .rail a:hover::before { background: rgba(245, 245, 247, 0.6); }
.live .rail a.is-past::before,
.live .rail a.is-now::before { background: var(--white); }
.live .rail span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.live .rail-now {
  display: block;
  min-width: 7.5em;
  font-size: 0.875rem;
  color: var(--soft);
}
.live .top-link { margin-left: 0; }

/* ---------- История: статичный вид ---------- */
.stage { padding-top: var(--bar); }
#scene, .leaders, .scroll-hint { display: none; }

.chapter { padding: 9vh var(--gutter); max-width: 46rem; }
.copy h1 {
  font: 700 clamp(3.5rem, 10vw, 8.5rem)/0.95 var(--display);
  letter-spacing: -0.035em;
  margin-bottom: 0.14em;
  background: linear-gradient(180deg, #ffffff 30%, #a9afb8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.copy h2 {
  font: 600 clamp(2rem, 3.6vw, 3.5rem)/1.06 var(--display);
  letter-spacing: -0.025em;
  text-wrap: balance;
  margin-bottom: 0.45em;
}
.copy p { color: var(--mist); max-width: 34ch; text-wrap: pretty; }
.copy .lede { font-size: clamp(1.0625rem, 1.5vw, 1.375rem); line-height: 1.4; max-width: 34ch; color: var(--soft); }

.text-link {
  display: inline-block;
  margin-top: 1.1em;
  color: var(--copper);
  text-underline-offset: 0.3em;
  text-decoration-thickness: 1px;
}
.text-link:hover { text-decoration-thickness: 2px; }

.parts { margin-top: 1.6rem; display: grid; gap: 0.7rem; }
.part strong { display: block; font-weight: 600; font-size: 0.9375rem; line-height: 1.3; }
.part span { display: block; font-size: 0.8125rem; line-height: 1.35; color: var(--mist); }

/* ---------- История: живой вид ---------- */
.live .story {
  /* --n и --k задаёт js/main.js: число глав и длина прокрутки на главу */
  height: calc((var(--n) - 1) * var(--k) * 100vh + 100vh);
  height: calc((var(--n) - 1) * var(--k) * 100svh + 100svh);
}
.live .stage {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  padding: 0;
  overflow: hidden;
  background: radial-gradient(70% 60% at 58% 56%, #17181c 0%, #08080a 55%, #000 100%);
}
.live #scene {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.9s ease;
}
.live #scene.is-ready { opacity: 1; }
.live .leaders {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  pointer-events: none;
  overflow: visible;
}
.leaders line { stroke: rgba(245, 245, 247, 0.7); stroke-width: 1; }
.leaders circle { fill: var(--white); stroke: rgba(0, 0, 0, 0.75); stroke-width: 2; }

/* Затемнение под текстом слева; --scrim задаёт js/main.js — в начале и в конце его нет */
.live .stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.92) 0%, rgba(0, 0, 0, 0.7) 26%, rgba(0, 0, 0, 0) 50%);
  opacity: var(--scrim, 0);
  pointer-events: none;
}

.live .chapter { padding: 0; max-width: none; }

.live .copy {
  position: absolute;
  z-index: 4;
  left: var(--gutter);
  top: 50%;
  width: min(27rem, 31vw);
  opacity: 0;
  visibility: hidden;
  transform: translate(var(--cx, 0%), calc(var(--cy, -50%) + var(--drift, 0px)));
  will-change: transform, opacity;
}
/* Начало: название и подзаголовок по центру над ноутбуком */
.live .chapter--hero .copy {
  --cx: -50%;
  --cy: 0%;
  left: 50%;
  top: clamp(76px, 12svh, 132px);
  width: min(52rem, calc(100% - 2 * var(--gutter)));
  text-align: center;
  opacity: 1;
  visibility: visible;
}
.live .chapter--hero .copy p { margin-inline: auto; }
.live .chapter--final .copy {
  --cx: -50%;
  --cy: 0%;
  left: 50%;
  top: auto;
  bottom: clamp(40px, 9svh, 96px);
  width: min(34rem, calc(100% - 2 * var(--gutter)));
  text-align: center;
}
.live .chapter--final .copy p { margin-inline: auto; }

.live .parts { margin: 0; display: block; }
.live .part {
  position: absolute;
  z-index: 4;
  left: 0;
  top: 0;
  max-width: 13rem;
  padding: 6px 11px 7px;
  border-left: 1px solid rgba(245, 245, 247, 0.7);
  background: rgba(0, 0, 0, 0.62);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  will-change: transform, opacity;
}

.live .scroll-hint {
  display: block;
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: clamp(20px, 4svh, 44px);
  transform: translateX(-50%);
  font-size: 0.875rem;
  color: var(--mist);
  padding-right: 20px;
}
.live .scroll-hint::after {
  content: "";
  position: absolute;
  right: 3px;
  top: 0.3em;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
}

/* ---------- Характеристики ---------- */
.specs {
  padding: clamp(80px, 16vh, 180px) var(--gutter) clamp(64px, 12vh, 140px);
  max-width: 64rem;
  margin: 0 auto;
}
.specs h2 {
  font: 700 clamp(2.5rem, 6vw, 5rem)/1 var(--display);
  letter-spacing: -0.03em;
  margin-bottom: 0.7em;
}
.specs dl > div {
  display: grid;
  grid-template-columns: minmax(8rem, 15rem) 1fr;
  gap: 0 2rem;
  padding: 1.05rem 0;
  border-top: 1px solid var(--line);
}
.specs dl > div:last-child { border-bottom: 1px solid var(--line); }
.specs dt { color: var(--mist); }
.specs dd { font-size: 1.125rem; line-height: 1.4; }

.outro {
  margin-top: clamp(48px, 9vh, 96px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2rem;
}
.outro p { font: 600 clamp(1.5rem, 2.6vw, 2.25rem)/1.1 var(--display); letter-spacing: -0.02em; max-width: 22ch; }
.button {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  border-radius: 999px;
  background: var(--white);
  color: #000;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.2s;
}
.button:hover { background: #fff; }

.foot {
  padding: 1.6rem var(--gutter) 2.2rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.4rem 2rem;
  font-size: 0.8125rem;
  color: var(--mist);
}

/* ---------- Узкие и вертикальные экраны: текст уходит вниз ---------- */
@media (max-width: 899px), (max-aspect-ratio: 11/10) {
  .live .top-link { display: none; }
  .live .rail-now { min-width: 0; text-align: right; }

  .live .stage { background: radial-gradient(110% 50% at 50% 40%, #17181c 0%, #08080a 60%, #000 100%); }
  .live .stage::before { display: none; }
  .live .stage::after {
    content: "";
    position: absolute;
    inset: 46% 0 0 0;
    z-index: 3;
    background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.94) 58%);
    opacity: var(--scrim, 0);
    pointer-events: none;
  }
  .live .copy {
    --cy: 0%;
    left: var(--gutter);
    right: var(--gutter);
    top: auto;
    bottom: clamp(28px, 6svh, 64px);
    width: auto;
  }
  .live .chapter--hero .copy { left: 50%; right: auto; bottom: auto; top: clamp(76px, 11svh, 120px); width: calc(100% - 2 * var(--gutter)); }
  .live .chapter--final .copy { --cx: 0%; left: var(--gutter); text-align: left; }
  .live .chapter--final .copy p { margin-inline: 0; }
  .copy h2 { font-size: clamp(1.75rem, 7.4vw, 2.75rem); }

  .live .part { padding: 4px 8px 5px; max-width: 11rem; }
  .live .part span { display: none; }
  .live .part strong { font-size: 0.8125rem; }

  .specs dl > div { grid-template-columns: 1fr; gap: 0.15rem; }
  .specs dd { font-size: 1.0625rem; }
}

@media (prefers-reduced-motion: reduce) {
  .live #scene, .live .rail a::before, .button { transition: none; }
}