:root {
  --bg: #0a0e14;
  --bg-alt: #0d1320;
  --surface: #11182a;
  --border: #1d2740;
  --text: #e6ebf5;
  --text-dim: #8b97b3;
  --accent: #2fd8ff;
  --accent-strong: #5fe3ff;
  --accent-glow: rgba(47, 216, 255, 0.35);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --container-w: 1180px;
  --header-pad: 18px;
  /* Фолбэк на случай, если js не отработает; js/main.js уточняет по факту. */
  --header-h: 76px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--header-pad) 0;
  transition: background 0.3s ease, border-color 0.3s ease, padding 0.3s ease;
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--border);
  padding: 12px 0;
}

.header .container {
  max-width: none;
  padding-left: 6vw;
  padding-right: 6vw;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.logo__mark {
  width: 28px;
  height: 28px;
  flex: none;
  color: var(--text);
}

.logo__bolt { fill: var(--accent); }

/* Именно .logo__text span: короткий «.logo span» поймал бы и саму обёртку
   .logo__text, покрасив всё слово в акцент. */
.logo__text span { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  transition: color 0.2s ease;
}

.nav a:hover { color: var(--text); }

.nav__cta {
  color: var(--bg) !important;
  background: var(--accent);
  padding: 9px 18px;
  border-radius: 999px;
  font-weight: 600;
}

.nav__cta:hover { background: var(--accent-strong); }

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
}

.burger span {
  width: 100%;
  height: 2px;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  /* Шапка фиксированная и вырезана из потока — резервируем её высоту плюс
     воздух, иначе контент центрируется в том числе под ней. */
  padding-top: calc(var(--header-h) + 24px);
  overflow: hidden;
}

.hero__canvas-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__canvas-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,14,20,0.2) 0%, rgba(10,14,20,0.55) 70%, var(--bg) 100%);
  pointer-events: none;
}

#hero-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 0 6vw;
  /* Центрирует, пока контент помещается. Когда не помещается (зум, низкий
     экран), авто-отступы обнуляются и контент прижимается к верху — в отличие
     от align-items: center, который переполняет контейнер в обе стороны. */
  margin-block: auto;
}

.hero__top {
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(47, 216, 255, 0.25);
  margin-bottom: 36px;
}

.hero__bottom {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 56px;
  align-items: start;
}

.hero__left {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero__slogan {
  font-size: 15px;
  color: var(--text-dim);
  line-height: 1.6;
}

.hero__title {
  font-size: clamp(32px, 5vw, 66px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero__subtitle {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 520px;
  margin-bottom: 36px;
}

.hero__services {
  min-width: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 1px solid var(--border);
  padding-left: 40px;
  margin-left: 15%;
}

.hero__services li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-dim);
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: color 0.2s ease;
}

.hero__services li:first-child { border-top: 1px solid rgba(255,255,255,0.04); }

.hero__services li::before {
  content: '—';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.hero__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn--primary:hover { transform: translateY(-2px); background: var(--accent-strong); }

.btn--ghost {
  border-color: var(--border);
  color: var(--text);
}

.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn--full { width: 100%; }

/* ---------- Sections ---------- */

.section { padding: 120px 0; position: relative; }

.section__tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.section__title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.section__lead {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 640px;
  margin-bottom: 50px;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- About ---------- */

.about__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 60px;
  align-items: start;
}

.about__text p { color: var(--text-dim); font-size: 16px; }

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 16px;
  text-align: center;
}

.stat__num {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
}

.stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ---------- Cards grid (services / cases) ---------- */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.card:hover { border-color: var(--accent); transform: translateY(-4px); }

.card__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--accent), transparent);
  opacity: 0.85;
}

.card h3 { font-size: 18px; margin-bottom: 10px; font-weight: 700; }

.card p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- Solutions ---------- */

.solutions__list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  border-top: 1px solid var(--border);
}

.solution {
  display: flex;
  gap: 28px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.solution__num {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  min-width: 60px;
}

.solution h3 { font-size: 19px; margin-bottom: 8px; }

.solution p { color: var(--text-dim); font-size: 15px; max-width: 600px; }

/* ---------- Process ---------- */

.process__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.step {
  position: relative;
  padding: 28px 24px 24px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}

.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  font-weight: 800;
  margin-bottom: 16px;
}

.step h3 { font-size: 16.5px; margin-bottom: 8px; }

.step p { color: var(--text-dim); font-size: 14px; }

/* ---------- Cases ---------- */

.case-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.case-card:hover { border-color: var(--accent); transform: translateY(-4px); }

.case-card__img {
  height: 128px;
  background: linear-gradient(135deg, var(--bg-alt), var(--surface));
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.case-card__img svg {
  width: 56px;
  height: 56px;
  opacity: 0.85;
  filter: drop-shadow(0 0 12px var(--accent-glow));
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.case-card:hover .case-card__img svg {
  transform: scale(1.08);
  opacity: 1;
}

.case-card__body { padding: 22px 24px; }

.case-card__body h3 { font-size: 17px; margin-bottom: 8px; }

.case-card__body p { color: var(--text-dim); font-size: 14px; }

/* ---------- Clients ---------- */

.clients__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.client-logo {
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-dim);
  font-weight: 600;
  font-size: 14px;
  background: var(--surface);
}

/* ---------- Contact ---------- */

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact__details {
  list-style: none;
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--text-dim);
  font-size: 15px;
}

.contact__form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form__row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form__row label {
  font-size: 13px;
  color: var(--text-dim);
}

.form__row input,
.form__row textarea {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font);
  font-size: 14.5px;
  resize: vertical;
  transition: border-color 0.2s ease;
}

.form__row input:focus,
.form__row textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form__status {
  font-size: 13.5px;
  color: var(--text-dim);
  min-height: 18px;
}

.form__status.success { color: var(--accent); }
.form__status.error { color: #ff6b6b; }

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 24px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer__brand p {
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 14px;
}

.footer__nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dim);
}

.footer__nav a:hover { color: var(--text); }

.footer__contacts {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dim);
}

.footer__copy {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .about__grid,
  .contact__inner { grid-template-columns: 1fr; }

  .cards-grid,
  .process__steps,
  .clients__grid { grid-template-columns: repeat(2, 1fr); }

  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav {
    position: fixed;
    /* Считаем от фактической высоты шапки: при 64px меню заходило под неё. */
    top: calc(var(--header-h) + 8px);
    right: 24px;
    left: 24px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .nav.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav a { padding: 10px 8px; }
  .nav__cta { text-align: center; margin-top: 6px; }

  .burger { display: flex; }

  /* Отступ под шапку задан на .hero через --header-h, здесь только воздух. */
  .hero__content { padding: 8px 24px 48px; }

  .hero__bottom {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero__services {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 20px;
  }

  .cards-grid,
  .process__steps,
  .clients__grid { grid-template-columns: 1fr; }

  .about__stats { grid-template-columns: 1fr 1fr; }

  .footer__inner { grid-template-columns: 1fr; gap: 28px; }
}