/* ===== domofon — стили сайта ===== */

:root {
  --bg: #0a0a0b;
  --bg-soft: #111113;
  --surface: #18181b;
  --surface-hover: #202024;
  --border: #2a2a2e;
  --border-soft: #232326;
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-faint: #6b6b70;
  --accent: #22d3ee;
  --accent-soft: rgba(34, 211, 238, 0.12);
  --accent-focus-bg: rgba(34, 211, 238, 0.04);
  --accent-text: #0a0a0b;
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.12);
  --glass: rgba(255, 255, 255, 0.03);
  --glass-strong: rgba(255, 255, 255, 0.025);
  --header-bg: rgba(10, 10, 11, 0.75);
  --header-bg-scrolled: rgba(10, 10, 11, 0.92);
  --vignette-strong: rgba(10, 10, 11, 0.5);
  --vignette-soft: rgba(10, 10, 11, 0.1);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-lg: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
  --container: 1180px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

:root[data-theme="light"] {
  --bg: #f7f7f8;
  --bg-soft: #ffffff;
  --surface: #ffffff;
  --surface-hover: #f1f2f4;
  --border: #e2e2e6;
  --border-soft: #ebebee;
  --text: #17181a;
  --text-muted: #52525b;
  --text-faint: #86868d;
  --accent: #0e7490;
  --accent-soft: rgba(14, 116, 144, 0.1);
  --accent-focus-bg: rgba(14, 116, 144, 0.05);
  --accent-text: #ffffff;
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.1);
  --glass: rgba(0, 0, 0, 0.025);
  --glass-strong: rgba(0, 0, 0, 0.02);
  --header-bg: rgba(255, 255, 255, 0.75);
  --header-bg-scrolled: rgba(255, 255, 255, 0.92);
  --vignette-strong: rgba(247, 247, 248, 0.6);
  --vignette-soft: rgba(247, 247, 248, 0.15);
  --shadow-lg: 0 20px 50px -20px rgba(0, 0, 0, 0.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body,
.site-header,
.lang-menu,
.theme-toggle,
.service-card,
.service-icon,
.advantage,
.advantage svg,
.contact-list li,
.icon-badge,
.contact-form,
.form-row input,
.form-row select,
.form-row textarea,
.brand-chip,
.hero-tags li,
.hero-brand,
.cta-inner,
.site-footer {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.02em; }

p { margin: 0; }

ul { margin: 0; padding: 0; list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-text);
  padding: 12px 20px;
  z-index: 999;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.accent-text { color: var(--accent); }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-lead {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 620px;
  margin-top: 14px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
}
.btn-primary:hover { background: #4dd8ec; box-shadow: 0 8px 24px -8px var(--accent-soft); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-lg { padding: 15px 28px; font-size: 16px; }
.btn-sm { padding: 9px 16px; font-size: 14px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--border-soft);
  background: var(--header-bg-scrolled);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--text);
  flex-shrink: 0;
}
.logo-mark { color: var(--text); flex-shrink: 0; }
.logo-dot { fill: var(--accent); }
.logo-signal { stroke: var(--accent); }
.logo-dot-accent { color: var(--accent); }

.main-nav ul {
  display: flex;
  gap: 32px;
}
.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.main-nav a:hover { color: var(--text); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.phone-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  transition: color 0.2s ease;
}
.phone-link:hover { color: var(--accent); }

.lang-switch {
  position: relative;
}
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent); }
.lang-toggle svg { transition: transform 0.2s ease; }
.lang-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 6px;
  display: none;
  flex-direction: column;
  gap: 2px;
  box-shadow: var(--shadow-lg);
  z-index: 50;
}
.lang-menu.open { display: flex; }
.lang-menu button {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
  font-family: var(--font);
  padding: 9px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.lang-menu button:hover { background: var(--surface-hover); color: var(--text); }
.lang-menu button.active { color: var(--accent); font-weight: 600; }

.lang-inline {
  display: flex;
  gap: 8px;
}
.lang-inline button {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.lang-inline button:hover { color: var(--text); }
.lang-inline button.active { border-color: var(--accent); color: var(--accent); }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: block; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

.mobile-utility {
  display: flex;
  align-items: center;
  gap: 10px;
}
.mobile-utility .lang-inline { flex: 1; }
.mobile-utility .theme-toggle { width: 42px; height: 42px; }
.mobile-utility .theme-toggle svg { width: 19px; height: 19px; }

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
}
.burger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  margin: 0 auto;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.burger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 20px;
  padding: 20px 24px 28px;
  border-top: 1px solid var(--border-soft);
  background: var(--bg);
}
.mobile-nav ul { display: flex; flex-direction: column; gap: 16px; }
.mobile-nav a { font-size: 16px; font-weight: 500; color: var(--text); }
.mobile-nav.open { display: flex; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 100px;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-grid { position: absolute; inset: 0; opacity: 0.7; }
.hero-grid-line { stroke: var(--text); opacity: 0.05; }
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.8;
}
.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(34, 211, 238, 0.14), transparent 70%);
  filter: blur(20px);
}
.hero-vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 30%, var(--vignette-strong), transparent 65%),
    linear-gradient(180deg, var(--vignette-soft), var(--bg) 100%);
}

.hero-inner { position: relative; z-index: 1; max-width: 780px; }

.hero-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 14px 7px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--glass);
  margin-bottom: 24px;
}
.hero-brand-mark { color: var(--text); flex-shrink: 0; }
.hero-brand-mark .logo-dot { fill: var(--accent); }
.hero-brand-mark .logo-signal { stroke: var(--accent); }
.hero-brand-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.12;
  margin: 0 0 22px;
}

.hero-lead {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 28px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}
.hero-tags li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: var(--glass);
  backdrop-filter: blur(6px);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text);
}
.hero-tags svg { width: 16px; height: 16px; color: var(--accent); flex-shrink: 0; }

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 64px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 40px;
  margin: 0;
  padding-top: 36px;
  border-top: 1px solid var(--border-soft);
}
.hero-stats dt {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin: 0 0 4px;
}
.hero-stats dd {
  margin: 0;
  font-size: 13px;
  color: var(--text-faint);
}

/* ---------- Services ---------- */
.services {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.services::before {
  content: "";
  position: absolute;
  top: -220px;
  right: -160px;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.08), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.services h2, .advantages h2, .about h2, .contacts h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  max-width: 640px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.service-card {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 0.3s ease, transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}
.service-card:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateY(-6px);
  box-shadow: 0 24px 48px -24px rgba(34, 211, 238, 0.3);
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 20px;
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}
.service-icon svg { width: 26px; height: 26px; }
.service-card:hover .service-icon {
  background: var(--accent);
  color: var(--accent-text);
  transform: scale(1.08);
}

.service-card h3 { font-size: 20px; margin-bottom: 10px; }
.service-card > p { color: var(--text-muted); margin-bottom: 18px; }

.service-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.service-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.service-list li:last-child { margin-bottom: 0; }

/* ---------- Brands ---------- */
.brands {
  padding: 72px 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.brands .eyebrow, .brands h2 { text-align: center; }
.brands .eyebrow { display: block; }
.brands h2 { font-size: clamp(24px, 3vw, 32px); max-width: none; }

.brands-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.brand-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text-faint);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  filter: grayscale(1);
  opacity: 0.7;
  transition: filter 0.3s ease, opacity 0.3s ease, border-color 0.3s ease, color 0.3s ease, transform 0.3s ease, background 0.3s ease;
}
.brand-chip:hover {
  filter: grayscale(0);
  opacity: 1;
  color: var(--text);
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateY(-3px);
}

/* ---------- Advantages ---------- */
.advantages {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
  background: var(--bg-soft);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.advantages::before {
  content: "";
  position: absolute;
  bottom: -240px;
  left: -160px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.06), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.advantage {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.3s ease, transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}
.advantage:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px -22px rgba(34, 211, 238, 0.28);
}

.advantage svg {
  width: 48px;
  height: 48px;
  padding: 11px;
  box-sizing: border-box;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 12px;
  margin-bottom: 18px;
  display: block;
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}
.advantage:hover svg {
  background: var(--accent);
  color: var(--accent-text);
  transform: scale(1.06);
}
.advantage h3 { font-size: 18px; margin-bottom: 8px; }
.advantage p { color: var(--text-muted); font-size: 15px; }

/* ---------- About ---------- */
.about { padding: 100px 0; }

.about-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}

.about-text p { color: var(--text-muted); margin: 18px 0; }
.about-text h2 { margin-bottom: 6px; }

.about-points {
  display: grid;
  gap: 18px;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border-soft);
}
.about-points > div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
  padding-left: 18px;
}
.about-points > div::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}
.about-points strong { font-size: 15px; }
.about-points span { color: var(--text-muted); font-size: 14px; }

.about-visual { display: flex; align-items: center; justify-content: center; }
.about-svg { width: 100%; max-width: 340px; color: var(--text); overflow: visible; }
.ring { fill: none; stroke: var(--border); stroke-width: 1; transform-origin: center; }
.ring-2 { stroke: var(--border-soft); }
.ring-3 { stroke: var(--accent); opacity: 0.35; animation: ring-pulse 4s ease-in-out infinite; }

@keyframes ring-pulse {
  0%, 100% { transform: scale(1); opacity: 0.35; }
  50% { transform: scale(1.05); opacity: 0.55; }
}
@media (prefers-reduced-motion: reduce) {
  .ring-3 { animation: none; }
}

/* ---------- CTA banner ---------- */
.cta-banner {
  padding: 90px 0;
  background: linear-gradient(180deg, var(--bg-soft), var(--bg));
}
.cta-inner {
  position: relative;
  overflow: hidden;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 40px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
}
.cta-inner::before {
  content: "";
  position: absolute;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 480px;
  height: 320px;
  background: radial-gradient(ellipse at center, rgba(34, 211, 238, 0.16), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.cta-inner > * { position: relative; z-index: 1; }
.cta-inner h2 { font-size: clamp(26px, 3vw, 34px); margin-bottom: 14px; }
.cta-inner p { color: var(--text-muted); margin-bottom: 30px; font-size: 17px; }

/* ---------- Contacts ---------- */
.contacts { padding: 100px 0; position: relative; overflow: hidden; }
.contacts::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -180px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.07), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.contacts-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
}

.contact-list { margin-top: 32px; display: grid; gap: 14px; }
.contact-list li {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}
.contact-list li:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateX(4px);
}
.icon-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  flex-shrink: 0;
}
.icon-badge svg { width: 19px; height: 19px; }
.contact-list strong { display: block; font-size: 13px; color: var(--text-faint); margin-bottom: 3px; font-weight: 500; }
.contact-list a, .contact-list span { font-size: 15.5px; font-weight: 500; }
.contact-list a:hover { color: var(--accent); }

.contact-form {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 36px;
}
.contact-form::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.contact-form h2 { font-size: 24px; margin-bottom: 24px; }

.form-row { margin-bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
.form-row label { font-size: 13.5px; font-weight: 600; color: var(--text-muted); transition: color 0.2s ease; }
.form-row:focus-within label { color: var(--accent); }

.form-row input,
.form-row select,
.form-row textarea {
  background: var(--glass-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.form-row input::placeholder,
.form-row textarea::placeholder { color: var(--text-faint); }
.form-row input:hover,
.form-row select:hover,
.form-row textarea:hover { border-color: var(--text-faint); }
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--accent);
  background: var(--accent-focus-bg);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-row select { cursor: pointer; }
.form-row textarea { resize: vertical; min-height: 90px; }

.form-error {
  display: none;
  font-size: 13px;
  color: var(--danger);
}
.form-row.invalid input,
.form-row.invalid textarea { border-color: var(--danger); }
.form-row.invalid .form-error { display: block; }

.form-submit { width: 100%; margin-top: 8px; }

.form-success {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 14.5px;
  font-weight: 500;
  text-align: center;
}

.form-error-generic {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 14.5px;
  font-weight: 500;
  text-align: center;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  border-top: 1px solid var(--border-soft);
  padding-top: 64px;
  background: var(--bg-soft);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: min(600px, 80%);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.5;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand p { color: var(--text-muted); margin-top: 16px; font-size: 14.5px; max-width: 280px; }

.footer-nav h4, .footer-contacts h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 18px;
  font-weight: 600;
}
.footer-nav ul { display: grid; gap: 12px; }
.footer-nav a { color: var(--text-muted); font-size: 14.5px; }
.footer-nav a:hover { color: var(--accent); }

.footer-contacts { display: grid; gap: 12px; }
.footer-contacts a, .footer-contacts span { color: var(--text-muted); font-size: 14.5px; }
.footer-contacts a:hover { color: var(--accent); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding: 22px 24px;
  border-top: 1px solid var(--border-soft);
  color: var(--text-faint);
  font-size: 13.5px;
}

/* ---------- Floating call button ---------- */
.fab-call {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 90;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.fab-call.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .service-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .about-inner { grid-template-columns: 1fr; }
  .about-visual { order: -1; max-width: 260px; margin: 0 auto; }
  .contacts-inner { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .main-nav { display: none; }
  .header-actions .phone-link { display: none; }
  .header-actions .btn-sm { display: none; }
  .header-actions .lang-switch { display: none; }
  .header-actions > .theme-toggle { display: none; }
  .burger { display: flex; }
  .hero { padding: 80px 0 64px; }
  .hero-brand { margin-bottom: 18px; }
  .hero-tags { gap: 8px; margin-bottom: 28px; }
  .hero-tags li { padding: 7px 12px; font-size: 12.5px; }
  .hero-actions { margin-bottom: 48px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .advantages-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .services, .advantages, .about, .contacts, .cta-banner { padding: 64px 0; }
}