:root {
  --bg: #f4f7fa;
  --bg-elev: #ffffff;
  --surface: #ffffff;
  --ink: #14202b;
  --muted: #5b6b7a;
  --line: #d7e0e8;
  --accent: #0aa0b0;
  --accent-2: #087f8c;
  --accent-soft: #d9f4f7;
  --dark: #0f1720;
  --ok: #1f7a4c;
  --danger: #b42318;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(20, 32, 43, 0.08);
  --font: "Manrope", "Segoe UI", sans-serif;
  --display: "Sora", "Manrope", sans-serif;
  --container: 1120px;
  --header-bg: rgba(244, 247, 250, 0.86);
  --input-bg: #ffffff;
  --input-border: #c9d5e0;
  --glow-1: #d7f3f7;
  --glow-2: #e7eef5;
  --dacha-bg: linear-gradient(180deg, #eef7f9, #f4f7fa 70%);
  --dacha-border: #d7e8ec;
  --card-hover-border: #b6e5eb;
}

html[data-theme="dark"] {
  --bg: #0d141c;
  --bg-elev: #152029;
  --surface: #152029;
  --ink: #e8f0f5;
  --muted: #9aadb9;
  --line: #2a3b4a;
  --accent: #2bc4d4;
  --accent-2: #5ed4e0;
  --accent-soft: rgba(43, 196, 212, 0.16);
  --dark: #080d12;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --header-bg: rgba(13, 20, 28, 0.9);
  --input-bg: #101820;
  --input-border: #334556;
  --glow-1: rgba(43, 196, 212, 0.12);
  --glow-2: rgba(30, 50, 70, 0.35);
  --dacha-bg: linear-gradient(180deg, #121b24, #0d141c 70%);
  --dacha-border: #243442;
  --card-hover-border: #3a6f7a;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, var(--glow-1) 0%, transparent 55%),
    radial-gradient(900px 400px at 90% 0%, var(--glow-2) 0%, transparent 50%),
    var(--bg);
  line-height: 1.55;
}
img { max-width: 100%; display: block; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
h1,h2,h3 { font-family: var(--display); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .6rem; }
p { margin: 0 0 1rem; color: var(--muted); }
.container { width: min(100% - 2rem, var(--container)); margin-inline: auto; }
.section { padding: 4.5rem 0; }
.section-head { max-width: 680px; margin-bottom: 2rem; }
.eyebrow { color: var(--accent-2); font-weight: 700; font-size: .85rem; letter-spacing: .04em; text-transform: uppercase; margin-bottom: .5rem; }
.lead { font-size: 1.05rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  min-height: 48px; padding: .75rem 1.2rem; border-radius: 999px;
  border: 1px solid transparent; font-weight: 700; cursor: pointer;
  text-decoration: none !important; transition: .2s ease; font-size: .95rem;
}
.btn-primary { background: var(--accent); color: #04161a; }
.btn-primary:hover { background: var(--accent-2); color: #fff; }
.btn-secondary { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent-2); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.2); }
.btn-block { width: 100%; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 72px; }
.logo { display: flex; align-items: center; gap: .7rem; color: var(--ink); text-decoration: none !important; font-weight: 800; font-family: var(--display); }
.logo-mark {
  width: 38px; height: 38px; border-radius: 12px;
  background: linear-gradient(145deg, #12c2d4, #087f8c);
  display: grid; place-items: center; color: #fff; font-size: .9rem;
}
.nav { display: flex; gap: 1.1rem; align-items: center; }
.nav a { color: var(--ink); font-weight: 600; text-decoration: none; font-size: .92rem; }
.nav a:hover { color: var(--accent-2); }
.header-cta { display: flex; gap: .6rem; align-items: center; }
.phone-link { font-weight: 800; color: var(--ink); text-decoration: none !important; white-space: nowrap; }
.burger { display: none; border: 0; background: transparent; width: 44px; height: 44px; }
.burger span { display: block; height: 2px; background: var(--ink); margin: 6px 8px; }

.theme-toggle {
  width: 44px; height: 44px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--surface);
  color: var(--ink); cursor: pointer; display: grid; place-items: center;
  flex-shrink: 0; padding: 0;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent-2); }
.theme-toggle .icon-sun,
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
.theme-toggle svg { width: 20px; height: 20px; }

.back-float {
  position: fixed; right: 1rem; bottom: 5.5rem; z-index: 70;
  width: 48px; height: 48px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  box-shadow: var(--shadow); cursor: pointer;
  display: grid; place-items: center; padding: 0;
  opacity: 0; pointer-events: none; transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease;
}
.back-float[hidden] { display: none !important; }
.back-float.is-visible {
  opacity: 1; pointer-events: auto; transform: translateY(0);
}
.back-float:hover { border-color: var(--accent); color: var(--accent-2); }
.back-float svg { width: 22px; height: 22px; }
@media (min-width: 961px) {
  .back-float { bottom: 1.5rem; }
}

.promo {
  background: var(--dark); color: #dce8f2; text-align: center; padding: .55rem 1rem; font-size: .9rem;
}

.hero {
  padding: 3.2rem 0 2rem;
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 2rem; align-items: center;
  min-height: min(78vh, 720px);
}
.hero h1 {
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  white-space: pre-line;
  margin-bottom: 1rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.4rem 0 1rem; }
.hero-meta { display: flex; flex-wrap: wrap; gap: .8rem 1.2rem; color: var(--muted); font-size: .92rem; }
.hero-visual {
  position: relative; border-radius: 28px; overflow: hidden; min-height: 420px;
  background:
    linear-gradient(160deg, rgba(10,160,176,.18), rgba(15,23,32,.55)),
    radial-gradient(circle at 30% 20%, #1ad0e0 0%, transparent 35%),
    linear-gradient(180deg, #1a2734, #0d141c);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.08);
}
.hero-visual svg { width: 100%; height: 100%; position: absolute; inset: 0; }
.hero-chip {
  position: absolute; left: 1rem; bottom: 1rem; right: 1rem;
  display: flex; gap: .6rem; flex-wrap: wrap;
}
.chip {
  background: rgba(255,255,255,.1); color: #eef8fb; border: 1px solid rgba(255,255,255,.16);
  backdrop-filter: blur(8px); border-radius: 999px; padding: .45rem .75rem; font-size: .82rem; font-weight: 600;
}

.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.35rem; box-shadow: 0 10px 30px rgba(20,32,43,.04);
  transition: transform .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--card-hover-border); }
.card h3 { font-size: 1.2rem; }
.card-icon {
  width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent-2); margin-bottom: .9rem; font-weight: 800;
}

.dacha {
  background: var(--dacha-bg);
  border-block: 1px solid var(--dacha-border);
}
.problem-grid, .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .8rem; margin: 1.2rem 0; }
.pill {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: .85rem 1rem;
  color: var(--ink); font-weight: 600; font-size: .95rem;
}
.signal-path {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: .8rem; margin-top: 1.5rem;
}
.signal-step {
  background: var(--dark); color: #e8f4f8; border-radius: 16px; padding: 1rem;
  position: relative; min-height: 110px;
}
.signal-step strong { display: block; font-size: .8rem; color: #7fdbe6; margin-bottom: .35rem; }
.signal-step span { font-weight: 700; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.step { background: var(--surface); border-radius: var(--radius); border: 1px solid var(--line); padding: 1.2rem; }
.step-num { font-family: var(--display); font-size: 1.6rem; color: var(--accent); font-weight: 800; }

.problems { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.problem {
  background: var(--surface); border-radius: var(--radius); border: 1px solid var(--line); padding: 1.2rem;
}
.problem h3 { font-size: 1.05rem; }
.problem p { margin: 0; }

.calc-box, .form-box {
  background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 1.4rem;
  box-shadow: var(--shadow);
}
.form-grid { display: grid; gap: .85rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: .85rem; }
label { display: block; font-weight: 700; font-size: .88rem; margin-bottom: .35rem; color: var(--ink); }
input, select, textarea {
  width: 100%; min-height: 48px; border-radius: 12px; border: 1px solid var(--input-border);
  padding: .7rem .85rem; font: inherit; background: var(--input-bg); color: var(--ink);
}
textarea { min-height: 110px; resize: vertical; }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; overflow: hidden; }
.calc-result {
  margin-top: 1rem; padding: 1rem; border-radius: 14px; background: var(--accent-soft);
  color: var(--ink); font-weight: 700;
}

.price-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.price-card .price { font-family: var(--display); font-size: 1.5rem; font-weight: 800; margin: .6rem 0; }
.note { font-size: .9rem; color: var(--muted); }

.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: .8rem; }
.gallery-item {
  aspect-ratio: 4/3; border-radius: 16px; overflow: hidden; background: var(--bg-elev);
  border: 1px solid var(--line); position: relative;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; }
.gallery-zoom {
  display: block; width: 100%; height: 100%; padding: 0; border: 0; background: transparent;
  cursor: zoom-in;
}
.gallery-ph {
  width: 100%; height: 100%; display: grid; place-items: center; color: var(--muted); font-weight: 600; text-align: center; padding: 1rem;
}

.lightbox[hidden] { display: none !important; }
.lightbox {
  position: fixed; inset: 0; z-index: 120;
  display: grid; place-items: center; padding: 1rem;
  background: rgba(8, 12, 18, .82);
  backdrop-filter: blur(4px);
  cursor: zoom-out;
}
.lightbox img {
  max-width: min(96vw, 1100px);
  max-height: 90vh;
  width: auto; height: auto;
  border-radius: 12px;
  box-shadow: 0 24px 60px rgba(0,0,0,.45);
  cursor: default;
}
.lightbox-close {
  position: absolute; top: 1rem; right: 1rem;
  width: 44px; height: 44px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.25); background: rgba(0,0,0,.35);
  color: #fff; font-size: 1.4rem; line-height: 1; cursor: pointer;
}

.why { display: grid; grid-template-columns: repeat(4, 1fr); gap: .8rem; }
.why-item { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 1rem; }
.why-item strong { display: block; margin-bottom: .35rem; }

.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.review { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 1.1rem; }
.stars { color: #c98512; font-weight: 700; margin-bottom: .4rem; }

.accordion details {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: .9rem 1rem; margin-bottom: .6rem;
}
.accordion summary { cursor: pointer; font-weight: 700; list-style: none; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion p { margin: .7rem 0 0; }

.empty {
  border: 1px dashed var(--line); border-radius: 16px; padding: 1.4rem; color: var(--muted); background: var(--bg-elev);
}

.site-footer {
  background: var(--dark); color: #c9d7e3; padding: 3rem 0 7rem;
}
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 1.5rem; }
.site-footer a { color: #dff6fa; }
.site-footer h3 { color: #fff; font-size: 1rem; }
.footer-bottom { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.08); font-size: .85rem; color: #8ea0b0; }

.mobile-bar {
  display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  background: rgba(15,23,32,.96); backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255,255,255,.08);
  padding: .45rem .6rem calc(.45rem + env(safe-area-inset-bottom));
  grid-template-columns: repeat(3, 1fr); gap: .4rem;
}
.mobile-bar a {
  color: #fff; text-align: center; text-decoration: none !important; font-weight: 700; font-size: .82rem;
  padding: .7rem .3rem; border-radius: 12px; background: rgba(255,255,255,.06);
}
.mobile-bar a.accent { background: var(--accent); color: #04161a; }

.page-hero { padding: 2.5rem 0 1rem; }
.breadcrumbs { font-size: .88rem; color: var(--muted); margin-bottom: 1rem; }
.breadcrumbs a { color: var(--muted); }

.admin-body { margin: 0; background: #101820; color: #e8eef5; font-family: var(--font); }
.admin-wrap { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.admin-nav { background: #0c1218; padding: 1.2rem; border-right: 1px solid #223041; }
.admin-nav a { display: block; color: #c9d7e3; padding: .55rem .7rem; border-radius: 10px; text-decoration: none; margin-bottom: .2rem; }
.admin-nav a:hover, .admin-nav a.active { background: #182433; color: #fff; }
.admin-main { padding: 1.4rem; }
.admin-card { background: #172230; border: 1px solid #2a3b4d; border-radius: 14px; padding: 1rem; margin-bottom: 1rem; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { text-align: left; padding: .65rem .4rem; border-bottom: 1px solid #2a3b4d; vertical-align: top; font-size: .92rem; }
.flash { background: #163528; color: #b8f0cc; padding: .8rem 1rem; border-radius: 10px; margin-bottom: 1rem; }
.admin-actions { display: flex; gap: .5rem; flex-wrap: wrap; }

.calc-lead-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 1.2rem; align-items: start; }
.service-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 1.5rem; }

@media (max-width: 960px) {
  .hero-grid, .cards-3, .problem-grid, .solution-grid, .signal-path, .steps, .problems, .price-grid, .gallery, .why, .reviews, .footer-grid, .form-row, .calc-lead-grid, .service-layout {
    grid-template-columns: 1fr;
  }
  .signal-path, .steps, .why, .reviews, .cards-3, .price-grid, .gallery { grid-template-columns: 1fr 1fr; }
  .nav, .header-cta .btn { display: none; }
  .burger { display: inline-block; }
  .nav.open {
    display: flex; flex-direction: column; position: absolute; left: 0; right: 0; top: 72px;
    background: var(--surface); padding: 1rem; border-bottom: 1px solid var(--line);
  }
  .mobile-bar { display: grid; }
  .site-footer { padding-bottom: 6.5rem; }
  .admin-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .signal-path, .steps, .why, .reviews, .cards-3, .price-grid, .gallery { grid-template-columns: 1fr; }
  .hero-visual { min-height: 300px; }
}

.modal[hidden] { display: none !important; }
.modal {
  position: fixed; inset: 0; z-index: 100;
  display: none; place-items: center; padding: 1rem;
}
.modal.is-open {
  display: grid;
}
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(15, 23, 32, .55);
  backdrop-filter: blur(4px);
}
.modal-dialog {
  position: relative; z-index: 1;
  width: min(100%, 420px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.5rem 1.4rem;
  box-shadow: 0 24px 60px rgba(0,0,0,.22);
  text-align: center;
}
.modal-dialog h2 {
  margin: 0 0 .6rem;
  font-size: 1.45rem;
}
.modal-dialog p {
  margin: 0 0 1.2rem;
  color: var(--muted);
}
.modal-dialog .btn { min-width: 140px; }