:root {
  --ink: #17212b;
  --ink-2: #26323e;
  --paper: #fffdf9;
  --soft: #f5f1e9;
  --line: rgba(23, 33, 43, .13);
  --amber: #d77924;
  --amber-light: #f0a54b;
  --rust: #9b4628;
  --white: #fff;
  --radius: 22px;
  --shadow: 0 24px 70px rgba(23, 33, 43, .12);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Manrope", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 1000; padding: 10px 16px; background: #fff; color: #111; }
.skip-link:focus { top: 20px; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255,255,255,.12);
  transition: background .25s ease, padding .25s ease, box-shadow .25s ease;
}
.site-header.scrolled { padding: 12px 0; background: rgba(23,33,43,.96); box-shadow: 0 10px 35px rgba(0,0,0,.16); backdrop-filter: blur(12px); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand img { width: 190px; height: auto; }
.main-nav { display: flex; align-items: center; gap: 28px; color: #fff; }
.main-nav > a { text-decoration: none; font-size: 14px; font-weight: 700; }
.main-nav > a:not(.button):not(.nav-phone):hover { color: #ffc67f; }
.nav-phone { border-left: 1px solid rgba(255,255,255,.2); padding-left: 28px; }
.nav-toggle { display: none; width: 42px; height: 42px; border: 0; border-radius: 10px; background: rgba(255,255,255,.12); padding: 10px; }
.nav-toggle span { display: block; height: 2px; margin: 5px 0; background: #fff; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 25px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--amber-light), var(--amber));
  color: #1b1b1b;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 12px 30px rgba(215,121,36,.25);
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(215,121,36,.34); }
.button-small { min-height: 42px; padding-inline: 18px; font-size: 13px !important; }

.hero { position: relative; min-height: 780px; display: grid; align-items: center; overflow: hidden; background: #211b18; color: #fff; }
.hero-media { position: absolute; inset: 0; background: url("hero-osz.png") 58% center / cover no-repeat; transform: scale(1.01); }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(12,16,20,.92) 0%, rgba(12,16,20,.75) 33%, rgba(12,16,20,.18) 66%, rgba(12,16,20,.08) 100%), linear-gradient(0deg, rgba(12,16,20,.25), transparent 45%); }
.hero-grid { position: relative; z-index: 2; padding-top: 100px; }
.hero-copy { max-width: 650px; }
.eyebrow { display: flex; align-items: center; gap: 11px; margin: 0 0 20px; color: #f8bd78; font-size: 12px; font-weight: 800; letter-spacing: .19em; text-transform: uppercase; }
.eyebrow span { width: 34px; height: 2px; background: currentColor; }
.eyebrow.dark { color: var(--rust); }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.11; letter-spacing: -.035em; }
h1 { margin-bottom: 26px; font-size: clamp(54px, 7.2vw, 92px); font-weight: 800; }
h1 em, h2 em { color: var(--amber-light); font-style: normal; }
.hero-lead { max-width: 610px; margin-bottom: 34px; color: rgba(255,255,255,.82); font-size: 19px; line-height: 1.7; }
.hero-actions { display: flex; align-items: center; gap: 28px; }
.text-link { color: #fff; font-weight: 800; text-decoration: none; }
.text-link span { margin-left: 8px; color: var(--amber-light); }
.hero-badges { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 54px; }
.hero-badges span { padding: 10px 14px; border: 1px solid rgba(255,255,255,.18); border-radius: 99px; background: rgba(255,255,255,.09); color: rgba(255,255,255,.82); font-size: 13px; backdrop-filter: blur(8px); }
.hero-badges b { color: #fff; }

.trust-strip { position: relative; z-index: 3; margin-top: -34px; }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); overflow: hidden; border-radius: 18px; background: #fff; box-shadow: var(--shadow); }
.trust-grid > div { display: flex; align-items: center; gap: 16px; min-height: 102px; padding: 22px 30px; border-right: 1px solid var(--line); }
.trust-grid > div:last-child { border-right: 0; }
.trust-icon { display: grid; flex: 0 0 44px; height: 44px; place-items: center; border-radius: 50%; background: #fbecdc; color: var(--rust); font-weight: 900; }
.trust-grid p { margin: 0; }
.trust-grid b, .trust-grid small { display: block; }
.trust-grid small { margin-top: 2px; color: #6b747d; }

.section { padding: 120px 0; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: start; }
.section-heading h2, .center-heading h2, .heating-copy h2, .contact-copy h2 { margin-bottom: 24px; font-size: clamp(38px, 4.7vw, 62px); }
.section-heading h2 em, .center-heading h2 em, .heating-copy h2 em, .contact-copy h2 em { color: var(--rust); }
.intro-copy { padding-top: 40px; color: #52606c; }
.lead { font-size: 19px; color: #34424e; }
.section-soft { background: var(--soft); }
.center-heading { max-width: 760px; margin: 0 auto 55px; text-align: center; }
.center-heading .eyebrow { justify-content: center; }
.center-heading > p:last-child { color: #64707a; }

.compare-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-card { position: relative; overflow: hidden; padding: 42px; border: 1px solid rgba(23,33,43,.1); border-radius: var(--radius); background: #fff; box-shadow: 0 16px 45px rgba(23,33,43,.06); }
.service-card.featured { border-color: rgba(215,121,36,.55); }
.card-number { position: absolute; top: 22px; right: 26px; color: rgba(155,70,40,.12); font-size: 66px; font-weight: 800; line-height: 1; }
.card-kicker { margin-bottom: 12px; color: var(--rust); font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.service-card h3 { margin-bottom: 18px; font-size: 32px; }
.service-card > p:not(.card-kicker) { max-width: 520px; color: #61707b; }
.recommended { position: absolute; top: 0; left: 42px; padding: 7px 14px; border-radius: 0 0 10px 10px; background: var(--amber); color: #181818; font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.check-list { display: grid; gap: 13px; margin: 28px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 29px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--amber); font-weight: 900; }
.notice { display: flex; gap: 18px; align-items: flex-start; margin-top: 24px; padding: 23px 26px; border-left: 4px solid var(--amber); border-radius: 12px; background: #fff9f0; }
.notice p { margin: 0; }
.notice-mark { display: grid; flex: 0 0 26px; height: 26px; place-items: center; border-radius: 50%; background: var(--amber); color: #fff; font-weight: 800; }

.heating { overflow: hidden; background: var(--ink); color: #fff; }
.heating-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; align-items: center; }
.heating-copy h2 em { color: var(--amber-light); }
.heating-copy .lead { color: rgba(255,255,255,.72); }
.feature-list { display: grid; gap: 22px; margin: 34px 0 38px; }
.feature-list > div { display: flex; gap: 20px; align-items: flex-start; }
.feature-list > div > span { display: grid; flex: 0 0 45px; height: 45px; place-items: center; border: 1px solid rgba(255,255,255,.2); border-radius: 50%; color: var(--amber-light); font-size: 12px; font-weight: 800; }
.feature-list p { margin: 0; }
.feature-list b, .feature-list small { display: block; }
.feature-list small { margin-top: 5px; color: rgba(255,255,255,.58); }
.heating-visual { position: relative; min-height: 480px; border: 1px solid rgba(255,255,255,.1); border-radius: 28px; background: radial-gradient(circle at 35% 30%, rgba(240,165,75,.27), transparent 45%), linear-gradient(145deg,#303e4b,#1b242d); box-shadow: inset 0 1px rgba(255,255,255,.07); }
.ac-unit { position: absolute; top: 90px; left: 50%; width: 65%; height: 92px; transform: translateX(-50%); border-radius: 16px 16px 25px 25px; background: linear-gradient(#fff,#dfe4e8); box-shadow: 0 20px 35px rgba(0,0,0,.24); }
.ac-unit::after { content: ""; position: absolute; inset: auto 9% 12px; height: 10px; border-radius: 50%; background: #aeb6bd; }
.ac-unit span { position: absolute; right: 18px; bottom: 22px; width: 7px; height: 7px; border-radius: 50%; background: #62c4a6; box-shadow: 0 0 12px #62c4a6; }
.air-lines { position: absolute; top: 192px; left: 50%; width: 45%; height: 140px; transform: translateX(-50%); }
.air-lines i { position: absolute; top: 0; width: 2px; height: 120px; background: linear-gradient(rgba(240,165,75,.65), transparent); transform: rotate(12deg); animation: air 2.8s ease-in-out infinite; }
.air-lines i:nth-child(1) { left: 15%; }
.air-lines i:nth-child(2) { left: 50%; animation-delay: .45s; }
.air-lines i:nth-child(3) { right: 15%; animation-delay: .9s; }
@keyframes air { 0%,100%{ opacity:.15; transform:translateY(-4px) rotate(12deg)} 50%{opacity:.75;transform:translateY(15px) rotate(5deg)} }
.temp-card { position: absolute; z-index: 2; right: -24px; bottom: 35px; width: 190px; padding: 20px; border: 1px solid rgba(255,255,255,.16); border-radius: 18px; background: rgba(255,255,255,.1); backdrop-filter: blur(14px); box-shadow: 0 20px 35px rgba(0,0,0,.2); }
.temp-card span, .temp-card small { display: block; color: rgba(255,255,255,.64); }
.temp-card b { display: block; color: #fff; font-size: 50px; line-height: 1.1; }

.why-us { background: #10171e; color: #fff; }
.center-heading.light > p:last-child { color: rgba(255,255,255,.62); }
.benefit-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.12); border-left: 1px solid rgba(255,255,255,.12); }
.benefit { min-height: 260px; padding: 34px 28px; border-right: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); }
.benefit > span { color: var(--amber-light); font-size: 12px; font-weight: 800; }
.benefit h3 { margin: 58px 0 15px; font-size: 23px; }
.benefit p { color: rgba(255,255,255,.56); }

.faq-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; }
.dark-link { color: var(--rust); }
.accordion { border-top: 1px solid var(--line); }
.accordion details { border-bottom: 1px solid var(--line); }
.accordion summary { display: flex; justify-content: space-between; gap: 20px; padding: 25px 0; font-size: 18px; font-weight: 800; cursor: pointer; list-style: none; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary span { color: var(--amber); font-size: 24px; transition: transform .2s ease; }
.accordion details[open] summary span { transform: rotate(45deg); }
.accordion details p { padding: 0 44px 24px 0; color: #5a6874; }

.contact { padding: 110px 0; background: linear-gradient(135deg,#263441,#18222c); color: #fff; }
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: start; }
.contact-copy h2 em { color: var(--amber-light); }
.contact-copy > p:not(.eyebrow) { color: rgba(255,255,255,.68); }
.contact-links { display: grid; gap: 13px; margin-top: 38px; }
.contact-links a { text-decoration: none; }
.contact-links span, .contact-links b { display: block; }
.contact-links span { color: rgba(255,255,255,.45); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; }
.contact-links b { font-size: 19px; }
.contact-form { padding: 38px; border-radius: var(--radius); background: #fff; color: var(--ink); box-shadow: 0 30px 70px rgba(0,0,0,.18); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form > label, .field-row label { display: grid; gap: 7px; margin-bottom: 17px; font-size: 13px; font-weight: 800; }
.contact-form input:not([type="checkbox"]), .contact-form select, .contact-form textarea { width: 100%; border: 1px solid #d9dde0; border-radius: 10px; background: #fafafa; padding: 13px 14px; color: #1d2832; outline: none; transition: border .2s, box-shadow .2s; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--amber); box-shadow: 0 0 0 3px rgba(215,121,36,.14); }
.contact-form textarea { resize: vertical; }
.consent { grid-template-columns: auto 1fr !important; align-items: start; gap: 10px !important; font-weight: 500 !important; }
.consent input { margin-top: 5px; }
.consent a { color: var(--rust); }
.submit-button { width: 100%; margin-top: 8px; }
.hp-field { position: absolute !important; left: -9999px !important; }
.form-status { margin-bottom: 18px; padding: 12px 14px; border-radius: 9px; background: #edf8f2; color: #1d6345; font-size: 14px; font-weight: 700; }
.form-status.error { background: #fff1ee; color: #98351f; }

.site-footer { padding: 50px 0 24px; background: #0c1116; color: rgba(255,255,255,.7); }
.footer-main { display: flex; align-items: center; gap: 38px; padding-bottom: 38px; }
.footer-main p { margin: 0; }
.footer-links { display: flex; gap: 22px; margin-left: auto; }
.footer-links a { font-size: 13px; font-weight: 700; text-decoration: none; }
.footer-links a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1); font-size: 12px; }
.floating-call { position: fixed; z-index: 40; right: 22px; bottom: 22px; display: none; align-items: center; gap: 8px; padding: 12px 17px; border-radius: 99px; background: var(--amber); color: #151515; box-shadow: 0 12px 30px rgba(0,0,0,.26); text-decoration: none; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .main-nav { position: fixed; inset: 82px 20px auto; display: none; align-items: stretch; padding: 24px; border: 1px solid rgba(255,255,255,.14); border-radius: 16px; background: #17212b; box-shadow: 0 20px 50px rgba(0,0,0,.32); }
  .main-nav.open { display: grid; }
  .nav-phone { border-left: 0; padding-left: 0; }
  .two-col, .heating-grid, .faq-layout, .contact-grid { grid-template-columns: 1fr; gap: 52px; }
  .heating-visual { max-width: 630px; width: 90%; }
  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .temp-card { right: -10%; }
  .footer-main { flex-wrap: wrap; }
  .footer-links { width: 100%; margin-left: 0; }
}

@media (max-width: 700px) {
  .container { width: min(100% - 28px, 1180px); }
  .site-header { padding: 15px 0; }
  .brand img { width: 160px; }
  .hero { min-height: 760px; align-items: end; }
  .hero-media { background-position: 66% center; }
  .hero-shade { background: linear-gradient(0deg, rgba(12,16,20,.96) 0%, rgba(12,16,20,.8) 48%, rgba(12,16,20,.14) 100%); }
  .hero-grid { padding: 145px 0 72px; }
  h1 { font-size: 48px; }
  .hero-lead { font-size: 17px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
  .hero-badges { margin-top: 38px; }
  .trust-strip { margin-top: 0; }
  .trust-grid { grid-template-columns: 1fr; border-radius: 0; }
  .trust-grid > div { min-height: 88px; border-right: 0; border-bottom: 1px solid var(--line); }
  .section { padding: 82px 0; }
  .section-heading h2, .center-heading h2, .heating-copy h2, .contact-copy h2 { font-size: 39px; }
  .intro-copy { padding-top: 0; }
  .compare-grid { grid-template-columns: 1fr; }
  .service-card { padding: 35px 25px; }
  .recommended { left: 25px; }
  .heating-visual { width: 100%; min-height: 390px; }
  .temp-card { right: 14px; bottom: 18px; }
  .benefit-grid { grid-template-columns: 1fr; }
  .benefit { min-height: 210px; }
  .benefit h3 { margin-top: 38px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 26px 20px; }
  .footer-main { display: grid; gap: 20px; }
  .footer-links { flex-wrap: wrap; }
  .footer-bottom { flex-direction: column; }
  .floating-call { display: flex; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}