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

:root {
  --bg: #0f1117;
  --bg-alt: #161b26;
  --bg-card: #1c2333;
  --bg-warm: #2a1f14;
  --text: #e8eaed;
  --text-muted: #9aa0b0;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --accent-glow: rgba(245, 158, 11, 0.25);
  --green: #22c55e;
  --blue: #3b82f6;
  --whatsapp: #25d366;
  --telegram: #2aabee;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --header-h: 72px;
  --banner-h: 48px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

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

body.has-banner {
  --header-offset: var(--banner-h);
}

body.has-banner .header {
  top: var(--banner-h);
}

body.has-banner html {
  scroll-padding-top: calc(var(--header-h) + var(--banner-h) + 16px);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Discount banner */
.discount-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--banner-h);
  background: linear-gradient(135deg, #16a34a, #22c55e);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 0 20px;
  font-weight: 600;
  font-size: 0.95rem;
  color: #fff;
  text-align: center;
  flex-wrap: wrap;
}

.discount-banner.hidden { display: none; }

.discount-icon { font-size: 1.2rem; }

.discount-sub {
  font-weight: 400;
  font-size: 0.8rem;
  opacity: 0.9;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: top 0.3s;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo__mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), #ea580c);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.75rem;
  color: #fff;
}

.logo__text {
  font-weight: 700;
  font-size: 1.1rem;
}

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

.nav {
  display: flex;
  gap: 24px;
}

.nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header__phone { display: none; }

.lang-switch {
  display: flex;
  background: var(--bg-card);
  border-radius: 8px;
  padding: 3px;
  border: 1px solid var(--border);
}

.lang-switch__btn {
  padding: 5px 12px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
}

.lang-switch__btn.active {
  background: var(--accent);
  color: #000;
}

.lang-switch__btn:hover:not(.active) {
  color: var(--text);
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), #ea580c);
  color: #000;
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

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

.btn--whatsapp {
  background: var(--whatsapp);
  color: #fff;
}

.btn--whatsapp:hover { background: #1fb855; }

.btn--telegram {
  background: var(--telegram);
  color: #fff;
}

.btn--telegram:hover { background: #1a9ad4; }

.btn--sm {
  padding: 8px 16px;
  font-size: 0.8rem;
}

/* Hero */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 60px) 0 80px;
  overflow: hidden;
}

body.has-banner .hero {
  padding-top: calc(var(--header-h) + var(--banner-h) + 60px);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(245, 158, 11, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    var(--bg);
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--accent-light);
  font-weight: 500;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero__subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 520px;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero__cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.2s, border-color 0.2s;
}

.hero-card:hover {
  transform: translateX(4px);
  border-color: rgba(245, 158, 11, 0.3);
}

.hero-card--warm {
  background: linear-gradient(135deg, var(--bg-warm), var(--bg-card));
  border-color: rgba(245, 158, 11, 0.2);
}

.hero-card__icon { font-size: 1.8rem; }

.hero-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.hero-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 80px 0;
}

.section--alt { background: var(--bg-alt); }

.section--warm {
  background: linear-gradient(135deg, var(--bg-warm), var(--bg-alt));
}

.section__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.section__title--light { color: #fff; }

.section__subtitle {
  color: var(--text-muted);
  margin-bottom: 40px;
  font-size: 1rem;
}

.section__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section__label--light { color: var(--accent-light); }

/* Services grid */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.2s;
}

.service-card:hover { border-color: rgba(245, 158, 11, 0.25); }

.service-card__header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.service-card__emoji { font-size: 2rem; }

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
}

.service-card__list li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.service-card__list li:last-child { border-bottom: none; }

.service-card__list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.service-card__link {
  display: inline-block;
  margin-top: 20px;
  color: var(--accent-light);
  font-weight: 600;
  font-size: 0.9rem;
}

.service-card__link:hover { text-decoration: underline; }

/* Split layout */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.split__content p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.features-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.feature-item__icon {
  width: 24px;
  height: 24px;
  background: rgba(34, 197, 94, 0.15);
  color: var(--green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Visual cards */
.visual-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.visual-card h4 {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--accent-light);
}

.visual-card__steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--bg);
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.step__num {
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* AC cycle */
.cycle-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cycle-step {
  display: flex;
  gap: 14px;
  padding: 12px;
  background: var(--bg);
  border-radius: var(--radius);
}

.cycle-step__num {
  width: 28px;
  height: 28px;
  background: rgba(59, 130, 246, 0.2);
  color: var(--blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.cycle-step strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.cycle-step p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Alerts */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin: 16px 0;
  line-height: 1.5;
}

.alert strong { margin-right: 4px; }

.alert--warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--accent-light);
}

.alert--info {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
}

/* Warmbox */
.warmbox {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.warmbox__text {
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 28px;
  font-size: 1rem;
}

.warmbox__features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.warmbox__feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.warmbox__feature span:first-child { font-size: 1.3rem; }

.temp-display {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(234, 88, 12, 0.1));
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}

.temp-display__value {
  display: block;
  font-size: 4rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1;
}

.temp-display__label {
  display: block;
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Why grid */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: transform 0.2s;
}

.why-card:hover { transform: translateY(-4px); }

.why-card__icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
}

.why-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.why-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Prices */
.prices-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.price-card--featured {
  border-color: rgba(59, 130, 246, 0.3);
  background: linear-gradient(135deg, var(--bg-card), rgba(59, 130, 246, 0.05));
}

.price-card h3 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  font-weight: 600;
}

.price-card__highlight {
  text-align: center;
  padding: 20px;
  background: var(--bg);
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.price-card__amount {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue);
}

.price-card__note {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.price-card ul li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.price-card ul li:last-child { border-bottom: none; }

.price-card ul li span:last-child {
  font-weight: 600;
  color: var(--accent-light);
  white-space: nowrap;
  margin-left: 12px;
}

.prices-disclaimer {
  margin-top: 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* Contacts */
.contacts-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
}

.contacts-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item__label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.contact-item__value {
  font-size: 1rem;
  font-weight: 500;
}

.contact-item__value a {
  color: var(--accent-light);
  font-size: 1.2rem;
  font-weight: 600;
}

.contact-item__messengers {
  display: flex;
  gap: 10px;
}

.contacts-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  min-height: 360px;
}

.contacts-map iframe {
  width: 100%;
  height: 100%;
  min-height: 360px;
}

/* Footer */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer__tagline,
.footer__brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.footer__links {
  display: flex;
  gap: 20px;
}

.footer__links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer__links a:hover { color: var(--accent-light); }

.footer__copy {
  width: 100%;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* FAB */
.fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 90;
  width: 56px;
  height: 56px;
  background: var(--whatsapp);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  transition: transform 0.2s;
}

.fab:hover { transform: scale(1.08); }

/* Mobile nav */
.nav.open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 20px;
  gap: 16px;
  z-index: 99;
}

body.has-banner .nav.open {
  top: calc(var(--header-h) + var(--banner-h));
}

.burger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.burger.active span:nth-child(2) { opacity: 0; }

.burger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Responsive */
@media (max-width: 960px) {
  .hero__inner,
  .split,
  .warmbox,
  .services-grid,
  .prices-grid,
  .contacts-grid {
    grid-template-columns: 1fr;
  }

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

  .hero__cards {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .hero-card { flex: 1; min-width: 200px; }

  .split--reverse .split__visual { order: -1; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .burger { display: flex; }
  .header__phone { display: inline-flex; }

  .hero__cards { flex-direction: column; }
  .hero-card { flex: none; }

  .why-grid { grid-template-columns: 1fr; }
  .warmbox__features { grid-template-columns: 1fr; }

  .hero__cta .btn { flex: 1; min-width: 140px; }

  .discount-banner {
    font-size: 0.8rem;
    height: auto;
    min-height: var(--banner-h);
    padding: 8px 16px;
  }

  .discount-sub { display: none; }
}

@media (max-width: 480px) {
  .section { padding: 60px 0; }
  .hero { padding-bottom: 60px; }
  .header__phone { display: none; }
}