/* ==========================================
   IT-IMPULSE — MODERN LAYER (lean, additive)
   Подключается ПОСЛЕ style.css. Не ломает layout: только
   ambient-эффекты, scroll-progress, marquee, page-transition,
   shine, gradient-pan. Без !important на сетки.
   ========================================== */

:root {
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-cubic: cubic-bezier(0.33, 1, 0.68, 1);
  --modern-shine: linear-gradient(115deg, transparent 35%, rgba(255,255,255,0.10) 50%, transparent 65%);
}
[data-theme="light"] {
  --modern-shine: linear-gradient(115deg, transparent 35%, rgba(15,23,42,0.05) 50%, transparent 65%);
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .scroll-progress, .page-transition__overlay { display: none !important; }
  .trust-logos .marquee-track { animation: none !important; }
}

/* ---------- Нейтрализуем старое скрытие data-reveal:
   Motion-based reveal не нужно, чтобы старый CSS прятал секции.
   Если JS не загрузится — секции просто отображаются. ---------- */
[data-reveal] { opacity: 1; transform: none; transition: opacity 700ms var(--ease-out-expo), transform 700ms var(--ease-out-expo); }
/* hide ТОЛЬКО когда JS явно поставил pending (без !important — fallback safe) */
[data-reveal][data-anim-pending] { opacity: 0; transform: translate3d(0, 28px, 0); }
[data-reveal][data-anim-in] { opacity: 1; transform: translate3d(0, 0, 0); }

/* ---------- Scroll progress bar ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
  background: linear-gradient(90deg, transparent 0%, var(--accent) 30%, #ff8b95 70%, var(--accent) 100%);
  background-size: 200% 100%;
  transform-origin: 0 50%;
  transform: scaleX(0);
  box-shadow: 0 0 10px rgba(230,57,70,0.6);
  animation: progress-shimmer 5s linear infinite;
}
@keyframes progress-shimmer { to { background-position: 200% 0; } }

/* ---------- Page transition overlay ---------- */
.page-transition__overlay {
  position: fixed; inset: 0;
  z-index: 250;
  background: var(--bg-primary);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
}
.page-transition__overlay.is-active {
  visibility: visible;
}

/* На выходе (page-transition active) — slide-up + fade-out */
main {
  transition: opacity 380ms var(--ease-out-expo), transform 380ms var(--ease-out-expo);
  will-change: opacity, transform;
}
body.is-leaving main {
  opacity: 0;
  transform: translate3d(0, -24px, 0);
}
.page-transition__overlay {
  transition: opacity 380ms var(--ease-out-expo);
}
body.is-leaving .page-transition__overlay {
  opacity: 1;
}

/* ---------- Hero entrance — чистый CSS-стаггер (без JS и прелоадера) ----------
   Keyframes + fill-mode: both — элементы скрыты до старта своей задержки,
   работает даже если ни один скрипт не загрузился. */
@keyframes hero-rise {
  from { opacity: 0; transform: translate3d(0, 22px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}
.hero-eyebrow,
.hero-title,
.hero-sub,
.hero-ctas,
.hero-metrics,
.iso-scene {
  animation: hero-rise 800ms var(--ease-out-expo) both;
}
.hero-eyebrow { animation-delay: 80ms;  }
.hero-title   { animation-delay: 180ms; }
.hero-sub     { animation-delay: 320ms; }
.hero-ctas    { animation-delay: 440ms; }
.hero-metrics { animation-delay: 560ms; }
.iso-scene    { animation-delay: 200ms; }
.hero-status  { animation: hero-rise 800ms var(--ease-out-expo) 380ms both; }
@media (prefers-reduced-motion: reduce) {
  .hero-eyebrow, .hero-title, .hero-sub, .hero-ctas, .hero-metrics, .iso-scene, .hero-status {
    animation: none;
  }
}

/* ---------- Hero ambient — мягкий radial-glow, никаких aurora-fixed ---------- */
.hero {
  position: relative;
  isolation: isolate;
}
.hero::after {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 50% 35% at 75% 30%, rgba(230,57,70,0.18), transparent 65%),
    radial-gradient(ellipse 35% 30% at 20% 75%, rgba(60,90,130,0.08), transparent 70%);
  filter: blur(8px);
  z-index: -1;
  pointer-events: none;
  animation: hero-glow 14s ease-in-out infinite alternate;
}
@keyframes hero-glow {
  0% { opacity: 0.7; transform: translate3d(0, 0, 0); }
  100% { opacity: 1; transform: translate3d(-2%, 1%, 0); }
}
[data-theme="light"] .hero::after {
  background:
    radial-gradient(ellipse 50% 35% at 75% 30%, rgba(230,57,70,0.10), transparent 65%),
    radial-gradient(ellipse 35% 30% at 20% 75%, rgba(60,90,130,0.05), transparent 70%);
}

/* ---------- Hero title — gradient sweep на акценте ---------- */
.hero-title .accent {
  background: linear-gradient(120deg, #ff4d5a 0%, #ffa1ab 50%, #ff4d5a 100%);
  background-size: 200% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: gradient-pan 7s linear infinite;
}
@keyframes gradient-pan { to { background-position: -200% 0; } }

/* Hero eyebrow — pulse-индикатор */
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 10px;
  vertical-align: middle;
  box-shadow: 0 0 0 0 rgba(230,57,70,0.6);
  animation: pulse-dot 2s ease-out infinite;
}
@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0   rgba(230,57,70,0.6); }
  70%  { box-shadow: 0 0 0 10px rgba(230,57,70,0);   }
  100% { box-shadow: 0 0 0 0   rgba(230,57,70,0);   }
}

/* iso-scene — мягкий float */
.iso-scene { animation: iso-float 7s ease-in-out infinite alternate; will-change: transform; }
@keyframes iso-float {
  0%   { transform: translateY(-3px); }
  100% { transform: translateY(7px); }
}

/* ---------- Btn primary — shine sweep ----------
   Используем ::before (а не ::after — у оригинала стоит стрелка " →") */
.btn-primary {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: transform 350ms var(--ease-out-expo), box-shadow 350ms var(--ease-out-expo), background-color 200ms ease;
}
.btn-primary::before {
  content: '';
  position: absolute; inset: 0;
  background: var(--modern-shine);
  background-size: 200% 100%;
  background-position: -100% 0;
  transition: background-position 700ms var(--ease-out-expo);
  pointer-events: none;
  border-radius: inherit;
  z-index: 0;
}
.btn-primary > *,
.btn-primary::after { position: relative; z-index: 1; }
.btn-primary:hover::before { background-position: 100% 0; }
.btn-primary:hover {
  box-shadow: 0 12px 36px -10px rgba(230,57,70,0.55);
}

/* btn-ghost — лёгкая подсветка */
.btn-ghost { transition: border-color 250ms ease, color 250ms ease, background-color 250ms ease; }

/* ---------- Service cards — subtle lift + shine sweep ----------
   Сетка из style.css сохраняется без изменений!  */
.service-card {
  transition: transform 400ms var(--ease-out-expo), border-color 250ms ease, box-shadow 400ms var(--ease-out-expo);
  isolation: isolate;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 50px -22px rgba(0,0,0,0.55);
}
[data-theme="light"] .service-card:hover {
  box-shadow: 0 22px 46px -22px rgba(15,23,42,0.18);
}
/* Shine — только для НЕ-flagship карт, чтобы не сломать флэг ::after с FLAGSHIP */
.service-card:not(.flagship)::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--modern-shine);
  background-size: 200% 100%;
  background-position: -100% 0;
  transition: background-position 800ms var(--ease-out-expo);
  pointer-events: none;
  border-radius: inherit;
  z-index: 0;
}
.service-card > * { position: relative; z-index: 1; }
.service-card:not(.flagship):hover::after { background-position: 100% 0; }

/* Flagship — корона: тонкое border-glow */
.service-card.flagship {
  position: relative;
}
.service-card.flagship::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(230,57,70,0.55), transparent 55%, rgba(230,57,70,0.18));
  z-index: -1;
  opacity: 0;
  transition: opacity 500ms ease;
  filter: blur(2px);
}
.service-card.flagship:hover::before { opacity: 0.6; }

/* Service icon glow on card hover */
.service-icon { transition: box-shadow 300ms ease, transform 300ms var(--ease-out-expo); }
.service-card:hover .service-icon {
  box-shadow: 0 0 24px rgba(230,57,70,0.4);
  transform: scale(1.05);
}

/* ---------- Reassure cards — soft lift ---------- */
.r-card {
  transition: transform 400ms var(--ease-out-expo), border-color 300ms ease, box-shadow 400ms var(--ease-out-expo);
}
.r-card:hover {
  transform: translateY(-3px);
  border-color: rgba(230,57,70,0.3);
  box-shadow: 0 18px 40px -20px rgba(0,0,0,0.5);
}
[data-theme="light"] .r-card:hover { box-shadow: 0 16px 36px -20px rgba(15,23,42,0.15); }

/* ---------- Compare bars — fill animation on reveal ---------- */
.bar-fill {
  transform-origin: 0 50%;
  transform: scaleX(var(--bar-progress, 1));
  transition: transform 1400ms var(--ease-out-expo);
}
section[data-anim-in] .bar-fill.bad  { animation: bar-grow-bad  1.4s var(--ease-out-expo) 0.2s both; }
section[data-anim-in] .bar-fill.good { animation: bar-grow-good 1.4s var(--ease-out-expo) 0.5s both; }
@keyframes bar-grow-bad  { from { transform: scaleX(0); } }
@keyframes bar-grow-good { from { transform: scaleX(0); } }

/* ---------- Trust bar — marquee для логотипов ---------- */
.trust-logos {
  position: relative;
  overflow: hidden;
  flex-wrap: nowrap !important;
  justify-content: flex-start !important;
  -webkit-mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent);
          mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent);
}
.trust-logos .marquee-track {
  display: flex;
  align-items: center;
  gap: 32px;
  white-space: nowrap;
  animation: marquee 32s linear infinite;
  will-change: transform;
}
.trust-logos:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-50%, 0, 0); }
}

/* ---------- Header — лёгкое усиление на скролле ---------- */
.header { transition: background-color 250ms ease, backdrop-filter 250ms ease, border-color 250ms ease; }
.header.scrolled {
  backdrop-filter: blur(14px) saturate(1.15);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
}

/* ---------- Form inputs — accent focus ---------- */
.form-panel input.inp:focus,
.form-panel textarea.inp:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px rgba(230,57,70,0.15) !important;
  outline: none !important;
}

/* ---------- Footer — тонкая красная нить сверху ---------- */
.footer { position: relative; }
.footer::before {
  content: '';
  position: absolute; top: 0; left: 50%;
  transform: translateX(-50%);
  width: 50%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}

/* ---------- Scrollbar (минимальный, стильный) ---------- */
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 6px;
  border: 2px solid var(--bg-primary);
}
*::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

/* ---------- Anchor link smooth ---------- */
html { scroll-behavior: smooth; }
/* Фиксированная шапка (nx-shell ~66–80px) + небольшой зазор.
   JS chapter-nav меряет offset динамически; это — запас для нативных якорей. */
section[id], [id|="chapter"] { scroll-margin-top: 96px; }
body.has-nx-shell [id|="chapter"] { scroll-margin-top: 96px; }

/* ---------- Nav: активный раздел (scrollspy ставит .is-current) ---------- */
.nav-links a.is-current { color: var(--text-primary); }
.nav-links a.is-current::after { transform: scaleX(1); }

/* ---------- Nav dropdown — мягкое появление ---------- */
.nav-dropdown-wrap.open .nav-dropdown-inner {
  animation: dropdown-in 240ms var(--ease-out-expo) both;
}
@keyframes dropdown-in {
  from { opacity: 0; transform: translateY(-8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---------- FAQ — мягкое раскрытие ответа ---------- */
.faq-item .faq-a { overflow: hidden; }
.faq-item[open] .faq-a { animation: faq-open 320ms var(--ease-out-cubic) both; }
@keyframes faq-open {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Compare-списки — стаггер строк после reveal секции ----------
   Ключ на [data-anim-in] (ставит JS): без JS атрибута нет → строки видны сразу. */
[data-anim-in] .nx-compare__list li { animation: li-in 480ms var(--ease-out-cubic) both; }
[data-anim-in] .nx-compare__col--bad .nx-compare__list li:nth-child(1) { animation-delay: 120ms; }
[data-anim-in] .nx-compare__col--bad .nx-compare__list li:nth-child(2) { animation-delay: 200ms; }
[data-anim-in] .nx-compare__col--bad .nx-compare__list li:nth-child(3) { animation-delay: 280ms; }
[data-anim-in] .nx-compare__col--bad .nx-compare__list li:nth-child(4) { animation-delay: 360ms; }
[data-anim-in] .nx-compare__col--bad .nx-compare__list li:nth-child(5) { animation-delay: 440ms; }
[data-anim-in] .nx-compare__col--good .nx-compare__list li:nth-child(1) { animation-delay: 260ms; }
[data-anim-in] .nx-compare__col--good .nx-compare__list li:nth-child(2) { animation-delay: 340ms; }
[data-anim-in] .nx-compare__col--good .nx-compare__list li:nth-child(3) { animation-delay: 420ms; }
[data-anim-in] .nx-compare__col--good .nx-compare__list li:nth-child(4) { animation-delay: 500ms; }
[data-anim-in] .nx-compare__col--good .nx-compare__list li:nth-child(5) { animation-delay: 580ms; }

[data-anim-in] .compare-body li { animation: li-in 480ms var(--ease-out-cubic) both; }
[data-anim-in] .compare-body li:nth-child(1) { animation-delay: 120ms; }
[data-anim-in] .compare-body li:nth-child(2) { animation-delay: 200ms; }
[data-anim-in] .compare-body li:nth-child(3) { animation-delay: 280ms; }
[data-anim-in] .compare-body li:nth-child(4) { animation-delay: 360ms; }
[data-anim-in] .compare-body li:nth-child(5) { animation-delay: 440ms; }
[data-anim-in] .compare-body.good li:nth-child(1) { animation-delay: 260ms; }
[data-anim-in] .compare-body.good li:nth-child(2) { animation-delay: 340ms; }
[data-anim-in] .compare-body.good li:nth-child(3) { animation-delay: 420ms; }
[data-anim-in] .compare-body.good li:nth-child(4) { animation-delay: 500ms; }
[data-anim-in] .compare-body.good li:nth-child(5) { animation-delay: 580ms; }
@keyframes li-in {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ---------- Sec-eyebrow — «дорисовка» акцентной линии при reveal ---------- */
[data-anim-in] .sec-eyebrow::before { animation: line-draw 700ms var(--ease-out-expo) both; }
@keyframes line-draw {
  from { transform: scaleX(0); transform-origin: 0 50%; }
  to   { transform: scaleX(1); transform-origin: 0 50%; }
}

/* ---------- Кнопка «наверх» (создаётся в main.js) ---------- */
.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 95;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--bg-elevated, var(--bg-card));
  color: var(--text-primary);
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 250ms ease, visibility 250ms ease, transform 250ms var(--ease-out-expo), border-color 200ms ease, color 200ms ease;
  box-shadow: 0 10px 30px -12px rgba(0,0,0,0.5);
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { border-color: var(--accent); color: var(--accent); }
.to-top:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[data-theme="light"] .to-top { box-shadow: 0 10px 30px -14px rgba(15,23,42,0.25); }
@media (max-width: 767px) {
  .to-top { display: none; } /* на мобильных конфликтует с плавающей панелью калькулятора */
}
@media (prefers-reduced-motion: reduce) {
  .nav-dropdown-wrap.open .nav-dropdown-inner,
  .faq-item[open] .faq-a,
  [data-anim-in] .compare-body li,
  [data-anim-in] .sec-eyebrow::before { animation: none !important; }
}

/* ---------- Magnetic — JS трансформирует .magnetic-inner ---------- */
.magnetic-wrap { display: inline-flex; }
.magnetic-inner {
  display: inline-flex;
  transition: transform 350ms var(--ease-out-expo);
  will-change: transform;
}