:root {
  --bg: #ffffff;
  --bg-elevated: #ffffff;
  --ink: #1a1f2e;
  --ink-muted: #5c6478;
  --accent: #3b71e8;
  --accent-hover: #2f5fcc;
  --accent-soft: rgba(59, 113, 232, 0.08);
  --line: rgba(26, 31, 46, 0.08);
  --shadow: 0 12px 40px rgba(26, 31, 46, 0.06);
  --radius: 12px;
  --radius-pill: 999px;
  --font: "Geologica", system-ui, sans-serif;
  --container: 1200px;
  --header-h: 72px;
}

[data-theme="night"] {
  --bg: #0f1219;
  --bg-elevated: #171b26;
  --ink: #eef1f8;
  --ink-muted: #9aa3b8;
  --accent: #5b8ef5;
  --accent-hover: #7aa3ff;
  --accent-soft: rgba(91, 142, 245, 0.12);
  --line: rgba(238, 241, 248, 0.1);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 400 16px/1.65 var(--font);
  color: var(--ink);
  background: var(--bg);
  transition: background 0.25s, color 0.25s;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.container { width: min(var(--container), calc(100% - 2rem)); margin-inline: auto; }
.narrow { width: min(720px, calc(100% - 2rem)); margin-inline: auto; }
.lead { font-size: 1.05rem; color: var(--ink-muted); max-width: 52ch; margin: 0 0 1.25rem; }
.eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.35rem;
  border-radius: var(--radius-pill);
  font: 500 0.95rem var(--font);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.15s;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn--secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn--secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn--sm { min-height: 40px; padding-inline: 1rem; font-size: 0.88rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.section { padding: clamp(3rem, 6vw, 5rem) 0; }
.section__head { margin-bottom: 2rem; }
.section__head h2, .section h2, .page-hero h1, .hero h1 {
  margin: 0 0 0.75rem;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.hero h1, .page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); }
.section h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}
.split--reverse .split__copy { order: 2; }
.split--reverse .split__media { order: 1; }
.split__media img { border-radius: var(--radius); box-shadow: var(--shadow); }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
}
.header__inner {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo { flex-shrink: 0; }
.logo__img--night { display: none; }
[data-theme="night"] .logo__img--day { display: none; }
[data-theme="night"] .logo__img--night { display: block; }

.nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  flex: 1;
  justify-content: center;
}
.nav__link {
  padding: 0.5rem 0.65rem;
  font-size: 0.9rem;
  font-weight: 450;
  border-radius: 8px;
  white-space: nowrap;
}
.nav__link:hover, .nav__link.is-active { color: var(--accent); }

.nav__dropdown { position: relative; }
.nav__dropdown-trigger { display: flex; align-items: center; }
.nav__sub-toggle {
  border: none;
  background: transparent;
  color: var(--ink-muted);
  padding: 0.35rem;
  cursor: pointer;
  border-radius: 6px;
}
.nav__panel {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.75rem;
  z-index: 50;
}
.nav__panel--mega { min-width: min(920px, 92vw); padding: 1.25rem; }
.nav__panel--drop { list-style: none; margin: 0; padding: 0.5rem; }
.nav__panel--drop a {
  display: block;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
}
.nav__panel--drop a:hover { background: var(--accent-soft); color: var(--accent); }

.nav__mega-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.25rem;
}
.nav__mega-title {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.nav__mega-list { list-style: none; margin: 0; padding: 0; }
.nav__mega-list a {
  display: block;
  padding: 0.35rem 0;
  font-size: 0.88rem;
}
.nav__mega-list a:hover { color: var(--accent); }
.nav__mega-promo {
  grid-column: 1 / -1;
  padding: 1rem;
  border-radius: calc(var(--radius) - 2px);
  background: var(--accent-soft);
}
.nav__mega-promo-title { margin: 0 0 0.35rem; font-weight: 600; }
.nav__mega-promo-text { margin: 0 0 0.75rem; font-size: 0.9rem; color: var(--ink-muted); }

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}
.header__phone {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
}
.header__phone:hover { color: var(--accent); }

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  cursor: pointer;
  font-size: 1rem;
}
[data-theme="night"] .theme-toggle__day { display: none; }
[data-theme="day"] .theme-toggle__night { display: none; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  padding: 10px 8px;
  cursor: pointer;
}
.burger span {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 1px;
}

.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--bg);
  z-index: 90;
  overflow: auto;
  border-top: 1px solid var(--line);
}
.mobile-nav__inner {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.mobile-nav__inner > a, .mobile-nav__group summary {
  padding: 0.85rem 0.5rem;
  font-weight: 500;
  border-bottom: 1px solid var(--line);
}
.mobile-nav__links { padding: 0.5rem 0 0.75rem 1rem; display: flex; flex-direction: column; gap: 0.35rem; }
.mobile-nav__links a { font-size: 0.92rem; color: var(--ink-muted); }
.mobile-nav__phone { margin-top: 1rem; font-weight: 600; color: var(--accent); }

/* Hero */
.hero { padding: clamp(2rem, 5vw, 4rem) 0 clamp(3rem, 6vw, 5rem); }
.hero__grid, .page-hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}
.hero__actions, .page-hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1.5rem; }
.hero__media img, .page-hero__media img { border-radius: var(--radius); box-shadow: var(--shadow); }
.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.hero__stats strong { display: block; font-size: 1.1rem; }
.hero__stats span { font-size: 0.85rem; color: var(--ink-muted); }

.page-hero { padding: clamp(2rem, 4vw, 3rem) 0 1rem; }
.page-hero--calc { text-align: center; }
.page-hero--calc .lead { margin-inline: auto; }

/* Cards */
.cards { display: grid; gap: 1.25rem; }
.cards--3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card--link:hover { transform: translateY(-3px); box-shadow: 0 16px 48px rgba(59, 113, 232, 0.12); }
.card__img { aspect-ratio: 3/2; object-fit: cover; width: 100%; }
.card__body { padding: 1.1rem 1.25rem 1.35rem; }
.card__body h3 { margin: 0 0 0.35rem; font-size: 1.1rem; }
.card__body p { margin: 0 0 0.75rem; font-size: 0.92rem; color: var(--ink-muted); }
.card__more { font-size: 0.88rem; font-weight: 500; color: var(--accent); }

.feature-list { list-style: none; margin: 1.25rem 0 0; padding: 0; display: grid; gap: 0.85rem; }
.feature-list li { display: grid; gap: 0.15rem; }
.feature-list strong { font-weight: 550; }
.feature-list span { color: var(--ink-muted); font-size: 0.92rem; }

.subgrid { display: grid; gap: 1rem; margin-top: 1.25rem; }
.subcard {
  padding: 1rem 1.1rem;
  border-radius: calc(var(--radius) - 2px);
  background: var(--accent-soft);
}
.subcard h3 { margin: 0 0 0.35rem; font-size: 1rem; }
.subcard p { margin: 0; font-size: 0.92rem; color: var(--ink-muted); }

/* Breadcrumbs */
.breadcrumbs { padding: 1rem 0 0; font-size: 0.85rem; color: var(--ink-muted); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 0.35rem; list-style: none; margin: 0; padding: 0; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 0.35rem; opacity: 0.5; }
.breadcrumbs a:hover { color: var(--accent); }

/* FAQ */
.faq { display: grid; gap: 0.5rem; margin-top: 1rem; }
.faq__item {
  border-radius: calc(var(--radius) - 2px);
  background: var(--accent-soft);
  padding: 0.25rem 1rem;
}
.faq__item summary { cursor: pointer; font-weight: 500; padding: 0.65rem 0; }
.faq__item p { margin: 0 0 0.85rem; color: var(--ink-muted); font-size: 0.92rem; }

/* Forms */
.lead-form, .calc-form { margin-top: 1.5rem; }
.lead-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.field { display: grid; gap: 0.35rem; }
.field--full { grid-column: 1 / -1; }
.field span { font-size: 0.85rem; color: var(--ink-muted); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}
.form-note { grid-column: 1 / -1; font-size: 0.78rem; color: var(--ink-muted); margin: 0; }

.calc-form__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.calc-result {
  padding: 1.25rem;
  border-radius: var(--radius);
  background: var(--accent-soft);
  margin-bottom: 1rem;
}
.calc-result__label { margin: 0; font-size: 0.85rem; color: var(--ink-muted); }
.calc-result__value { margin: 0.25rem 0; font-size: 1.75rem; font-weight: 600; }
.calc-result__note { margin: 0; font-size: 0.85rem; color: var(--ink-muted); }

.section--cta { padding-bottom: clamp(4rem, 8vw, 6rem); }

/* Shop */
.shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.shop-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.shop-card:hover { transform: translateY(-2px); }
.shop-card img { aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.shop-card__body { padding: 1rem; }
.shop-card__body h2 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.shop-card__body span { font-size: 0.85rem; color: var(--accent); }

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.product-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.product-card img { aspect-ratio: 1; object-fit: cover; width: 100%; }
.product-card__body { padding: 1rem; }
.product-card__body h3 { margin: 0 0 0.35rem; font-size: 0.95rem; }
.product-card__price { margin: 0 0 0.75rem; font-weight: 600; color: var(--accent); }

/* Footer */
.footer { padding: clamp(2.5rem, 5vw, 4rem) 0 1.5rem; }
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2rem 1.5rem;
}
.footer__tagline, .footer__contact { color: var(--ink-muted); font-size: 0.92rem; }
.footer__phone, .footer__email { display: block; margin: 0.35rem 0; font-weight: 500; }
.footer__phone:hover, .footer__email:hover { color: var(--accent); }
.footer__social { display: flex; gap: 0.75rem; margin-top: 0.75rem; font-size: 0.85rem; }
.footer__social a { color: var(--ink-muted); }
.footer__social a:hover { color: var(--accent); }
.footer__col-title { margin: 0 0 0.65rem; font-weight: 600; font-size: 0.9rem; }
.footer__col ul { list-style: none; margin: 0; padding: 0; }
.footer__col a {
  display: block;
  padding: 0.25rem 0;
  font-size: 0.88rem;
  color: var(--ink-muted);
}
.footer__col a:hover { color: var(--accent); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1rem;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.lead-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 80;
  background: var(--bg-elevated);
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 24px rgba(0,0,0,0.06);
}
.lead-bar__inner {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.92rem;
}
body { padding-bottom: 56px; }

@media (max-width: 1024px) {
  .nav { display: none; }
  .burger { display: flex; }
  .header__phone { display: none; }
  .hero__grid, .page-hero__grid, .split { grid-template-columns: 1fr; }
  .split--reverse .split__copy, .split--reverse .split__media { order: unset; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .lead-form { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; }
  .lead-bar__inner p { font-size: 0.82rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}