/* Анимации лендинга по мотивам plavno.ru. Подключается только на index.html — приложение не затрагивает.
   Свойства: transform и opacity (+ filter только в разовых появлениях). Всё движение отключается
   или смягчается при prefers-reduced-motion. */
:root {
  --ease-out-strong: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out-strong: cubic-bezier(0.77, 0, 0.175, 1);
  interpolate-size: allow-keywords;
}

/* Контент поверх декоративных объектов */
.section-light { overflow: clip; }
.section-dark > .wrap, .section-light > .wrap, .hero-inner { z-index: 1; }

/* ---------- Появление hero при загрузке: из размытия, каскадом ---------- */
.hero-title .line { display: block; overflow: hidden; padding: 0 .04em .1em; margin-bottom: -.1em; }
.hero-title .line > span { display: inline-block; }

@media (prefers-reduced-motion: no-preference) {
  .intro { animation: intro-in 1100ms var(--ease-out-strong) both; }
  .hero-title .intro { animation-name: line-up; animation-duration: 1200ms; }
  .hero-stage.intro { animation-name: stage-in; animation-duration: 1400ms; }
  .nav.intro { animation-name: nav-in; animation-duration: 900ms; }
  .intro-1 { animation-delay: 120ms; }
  .intro-2 { animation-delay: 220ms; }
  .intro-3 { animation-delay: 330ms; }
  .intro-4 { animation-delay: 480ms; }
  .intro-5 { animation-delay: 580ms; }
  .intro-6 { animation-delay: 700ms; }
}
@media (prefers-reduced-motion: reduce) {
  .intro { animation: fade-in 600ms ease both; }
}
@keyframes intro-in { from { opacity: 0; transform: translateY(28px); filter: blur(12px); } }
@keyframes line-up { from { opacity: 0; transform: translateY(105%); filter: blur(8px); } }
@keyframes stage-in { from { opacity: 0; transform: translateY(80px) scale(.96); filter: blur(16px); } }
@keyframes nav-in { from { opacity: 0; transform: translate(-50%, -24px); } }

/* ---------- Hero: гигантское слово за мокапом, мокап «встаёт» при скролле ---------- */
.hero-stage { position: relative; margin-top: 64px; }
.hero-word {
  position: absolute; left: 0; right: 0; top: 0; z-index: 0;
  font-size: clamp(88px, 21vw, 320px); font-weight: 800; line-height: .8; letter-spacing: -.05em;
  text-align: center; white-space: nowrap; pointer-events: none; user-select: none;
  background: linear-gradient(180deg, rgba(205, 184, 255, .6) 0%, rgba(139, 94, 255, .22) 55%, rgba(139, 94, 255, 0) 92%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  will-change: transform, opacity;
}
.mock-3d { position: relative; z-index: 1; margin-top: clamp(56px, 10.5vw, 168px); perspective: 1400px; }
.mock-3d::before {
  content: ''; position: absolute; left: 10%; right: 10%; bottom: -60px; height: 160px; z-index: -1;
  background: radial-gradient(50% 50% at 50% 50%, rgba(139, 94, 255, .55), transparent 70%); filter: blur(30px);
}
.hero-stage .mock { margin: 0 auto; transform-origin: 50% 0; will-change: transform; }
@media (prefers-reduced-motion: no-preference) {
  .hero-stage .mock { transform: rotateX(16deg) scale(.94); }
}

/* ---------- Медленно плывущие свечения ---------- */
@media (prefers-reduced-motion: no-preference) {
  .orb-1 { animation: orb-a 18s ease-in-out infinite alternate; }
  .orb-2 { animation: orb-b 22s ease-in-out infinite alternate; }
  .orb-3 { animation: orb-a 20s ease-in-out infinite alternate-reverse; }
}
@keyframes orb-a { to { transform: translate(90px, -50px) scale(1.12); } }
@keyframes orb-b { to { transform: translate(-80px, 60px) scale(.92); } }

/* ---------- 3D-объекты (Three.js): слоты задают место, кадр копируется в холст внутри слота ---------- */
.obj3d { position: absolute; z-index: 0; pointer-events: none; aspect-ratio: 1; }
.obj3d-canvas { display: block; width: 100%; height: 100%; }
.obj-hero-l { width: 300px; left: 2%; top: 360px; }
.obj-hero-r { width: 300px; right: 1%; top: 96px; }
.obj-features { width: 300px; right: -20px; top: 0; }
.obj-directions { width: 300px; left: -40px; top: 10px; }
.obj-calc { width: 260px; left: 6%; bottom: 30px; }
@media (max-width: 900px) { .obj-calc { width: 200px; left: auto; right: -40px; bottom: auto; top: 10px; } }
.obj-cta-l { width: 280px; left: 4%; top: 10%; }
.obj-cta-r { width: 300px; right: 3%; top: 2%; }
@media (max-width: 1240px) {
  .obj-hero-l { width: 200px; left: -70px; top: 420px; }
  .obj-hero-r { width: 220px; right: -60px; top: 80px; }
  .obj-features, .obj-directions { width: 230px; }
  .obj-cta-l { width: 200px; left: -40px; top: 45%; }
  .obj-cta-r { width: 220px; right: -60px; top: 0; }
}
@media (max-width: 760px) {
  .obj-hero-l { width: 130px; left: -50px; top: 470px; }
  .obj-hero-r { width: 140px; right: -44px; top: 70px; }
  .obj-features, .obj-directions { width: 160px; }
  .obj-features { width: 140px; right: -36px; top: -60px; }
  .obj-directions { left: -50px; top: -10px; }
  .obj-calc { width: 150px; right: -40px; top: 0; }
  .obj-cta-l { display: none; }
  .obj-cta-r { width: 160px; right: -46px; top: -40px; }
}

/* ---------- Появление блоков при прокрутке (класс .is-in ставит JS один раз) ---------- */
@media (scripting: enabled) and (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0; transform: translateY(40px) scale(.98);
    transition: opacity 900ms var(--ease-out-strong), transform 900ms var(--ease-out-strong);
  }
  [data-reveal].is-in { opacity: 1; transform: none; }
  [data-split] .line { display: block; overflow: hidden; padding-bottom: .08em; margin-bottom: -.08em; }
  [data-split] .line > span { display: inline-block; transform: translateY(110%); transition: transform 1000ms var(--ease-out-strong); }
  [data-split].is-in .line > span { transform: none; }
  /* Если скрипт не загрузился, контент всё равно появится */
  html:not(.motion-ready) [data-reveal], html:not(.motion-ready) [data-split] .line > span { animation: reveal-fallback 1ms 2s forwards; }
}
@media (scripting: enabled) and (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 0; transition: opacity 500ms ease; }
  [data-reveal].is-in { opacity: 1; }
  html:not(.motion-ready) [data-reveal] { animation: reveal-fallback 1ms 2s forwards; }
}
@keyframes reveal-fallback { to { opacity: 1; transform: none; filter: none; } }

/* ---------- Карточки модулей: живой градиент, блик за курсором, наклон ---------- */
.feature-slot { display: flex; perspective: 1000px; }
.feature-slot > .feature { flex: 1; transition: transform 500ms var(--ease-out-strong), box-shadow 400ms ease; }
.feature > * { position: relative; z-index: 1; }
.feature > .feature-num { position: absolute; }
.feature::after {
  content: ''; position: absolute; inset: -40%; z-index: 0; pointer-events: none;
  background:
    radial-gradient(30% 30% at 30% 30%, rgba(196, 170, 255, .45), transparent 70%),
    radial-gradient(28% 28% at 72% 68%, rgba(107, 63, 214, .7), transparent 70%);
}
@media (prefers-reduced-motion: no-preference) {
  .feature::after { animation: blob 14s ease-in-out infinite alternate; }
  .feature-slot:nth-child(2) .feature::after { animation-delay: -5s; }
  .feature-slot:nth-child(3) .feature::after { animation-delay: -9s; }
}
@keyframes blob { to { transform: translate(14%, -10%) rotate(28deg); } }

.spot {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: 0; border-radius: inherit;
  background: radial-gradient(280px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, .2), transparent 60%);
  transition: opacity 300ms ease;
}
.dir-card .spot { background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 50%), rgba(139, 94, 255, .14), transparent 60%); }
@media (hover: hover) and (pointer: fine) {
  .feature:hover { box-shadow: 0 40px 80px -30px rgba(139, 94, 255, .6); }
  [data-tilt]:hover .spot, [data-spot]:hover .spot { opacity: 1; }
}

/* ---------- Бегущие строки ---------- */
.ticker { position: relative; padding: 48px 0 64px; background: var(--bg); overflow: hidden; }
.ticker-band { display: flex; width: 112vw; margin-left: -6vw; padding: 18px 0; overflow: hidden; }
.ticker-band-a { position: relative; z-index: 1; background: var(--accent); transform: rotate(-2deg); box-shadow: 0 20px 50px -20px rgba(139, 94, 255, .7); }
.ticker-band-b { background: #1E1630; border-block: 1px solid rgba(189, 173, 206, .12); transform: rotate(1.6deg); margin-top: -14px; }
.ticker-track { display: flex; flex: none; align-items: center; }
.ticker-item-group { display: flex; flex: none; }
.ticker-item { display: inline-flex; align-items: center; gap: 28px; padding-right: 28px; color: #fff; font-size: clamp(20px, 2.6vw, 34px); font-weight: 700; letter-spacing: -.02em; white-space: nowrap; }
.ticker-band-b .ticker-item { color: var(--lavender); font-weight: 600; }
.ticker-sep { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, .55); flex: none; }
.ticker-band-b .ticker-sep { background: var(--accent); }
@media (prefers-reduced-motion: no-preference) {
  .ticker-track { animation: ticker 55s linear infinite; }
  .ticker-reverse { animation-duration: 70s; animation-direction: reverse; }
}
@media (hover: hover) and (pointer: fine) {
  .ticker-band:hover .ticker-track { animation-play-state: paused; }
}
@keyframes ticker { to { transform: translateX(-50%); } }

/* ---------- Карточки направлений ---------- */
.dir-card { position: relative; overflow: hidden; }
.dir-card > * { position: relative; z-index: 1; }
.dir-card .mono { transition: transform 500ms var(--ease-out-strong); }
.dir-arrow { margin-left: auto; width: 18px; height: 18px; flex: none; color: var(--accent-deep); opacity: 0; transform: translateX(-8px); transition: opacity 250ms ease, transform 400ms var(--ease-out-strong); }
@media (hover: hover) and (pointer: fine) {
  .dir-card:hover .mono { transform: rotate(-8deg) scale(1.1); }
  .dir-card:hover .dir-arrow { opacity: 1; transform: none; }
}

/* ---------- Шаги: линия прогресса заполняется по скроллу ---------- */
.steps-wrap { position: relative; margin-top: 56px; }
.steps-wrap .steps { margin-top: 0; }
.steps-line { position: absolute; left: 0; right: 0; top: -28px; height: 2px; border-radius: 2px; background: rgba(58, 9, 114, .1); overflow: hidden; }
.steps-line-fill { height: 100%; background: linear-gradient(90deg, #8B5EFF, #3A0972); transform-origin: 0 50%; will-change: transform; }
@media (prefers-reduced-motion: no-preference) {
  .steps-line-fill { transform: scaleX(0); }
  .steps li > span { transition: transform 700ms var(--ease-out-strong), background-color 400ms ease, color 400ms ease; transform: scale(.9); }
  .steps li.is-in > span { transform: none; }
}
.steps li.is-in > span { background: var(--accent); color: #fff; }
@media (max-width: 900px) {
  .steps-wrap { margin-top: 40px; padding-left: 22px; }
  .steps-line { left: 0; right: auto; top: 0; bottom: 0; width: 2px; height: auto; }
  .steps-line-fill { width: 100%; height: 100%; transform-origin: 50% 0; }
}
@media (max-width: 900px) and (prefers-reduced-motion: no-preference) {
  .steps-line-fill { transform: scaleY(0); }
}

/* ---------- Кнопки: блик и подъём ---------- */
.btn-sheen { position: relative; overflow: hidden; isolation: isolate; transition: transform 250ms var(--ease-out-strong), box-shadow 250ms ease, background-color 150ms ease; }
.btn-sheen::after {
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, .45) 50%, transparent 70%);
  transform: translateX(-120%);
}
@media (hover: hover) and (pointer: fine) {
  .btn-sheen:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -12px rgba(139, 94, 255, .8); }
  .btn-sheen:hover::after { transform: translateX(120%); transition: transform 800ms var(--ease-out-strong); }
  .btn-sheen:active { transform: scale(.97); }
}

/* ---------- Навигация: подчёркивание растёт слева ---------- */
.nav-links a { position: relative; }
.nav-links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -6px; height: 1.5px; border-radius: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: 100% 50%; transition: transform 400ms var(--ease-out-strong);
}
@media (hover: hover) and (pointer: fine) {
  .nav-links a:hover::after { transform: scaleX(1); transform-origin: 0 50%; }
}

/* ---------- FAQ: плавное раскрытие ---------- */
.faq details { transition: border-color 250ms ease, box-shadow 250ms ease; }
.faq details[open] { border-color: rgba(139, 94, 255, .35); box-shadow: 0 20px 40px -24px rgba(58, 9, 114, .35); }
@media (prefers-reduced-motion: no-preference) {
  .faq details::details-content { height: 0; overflow: clip; transition: height 450ms var(--ease-out-strong), content-visibility 450ms allow-discrete; }
  .faq details[open]::details-content { height: auto; }
}
@media (hover: hover) and (pointer: fine) {
  .faq details:hover { border-color: rgba(139, 94, 255, .3); }
}

/* ---------- Финальный CTA: дышащее свечение ---------- */
.cta-final { overflow: hidden; }
.cta-final::before {
  content: ''; position: absolute; left: 50%; bottom: -260px; width: 900px; height: 520px; margin-left: -450px;
  background: radial-gradient(50% 50% at 50% 50%, rgba(139, 94, 255, .5), transparent 70%); pointer-events: none;
}
@media (prefers-reduced-motion: no-preference) {
  .cta-final::before { animation: breathe 6s ease-in-out infinite alternate; }
}
@keyframes breathe { from { opacity: .55; transform: scale(.9); } to { opacity: 1; transform: scale(1.08); } }