:root {
  --navy: #061a2c;
  --navy-2: #0a2c48;
  --blue: #0787d1;
  --cyan: #22b8dd;
  --red: #ef4e42;
  --green: #55aa45;
  --light: #f3f7fa;
  --white: #fff;
  --text: #20364a;
  --muted: #617589;
  --line: #d8e4ec;
  --shadow: 0 18px 55px rgba(6, 26, 44, .12);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body { margin: 0; color: var(--text); font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 16px; line-height: 1.65; background: var(--white); }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
.container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 1000; padding: 10px 14px; border-radius: 9px; color: #fff; background: var(--navy); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid rgba(216, 228, 236, .95); background: rgba(255, 255, 255, .96); backdrop-filter: blur(16px); }
.nav-wrap { min-height: 78px; display: flex; align-items: center; gap: 22px; }
.brand { display: flex; align-items: center; gap: 11px; margin-right: auto; color: var(--navy); }
.brand-symbol { width: 48px; height: 48px; flex: 0 0 48px; filter: drop-shadow(0 8px 13px rgba(6, 26, 44, .16)); }
.brand-symbol .arc { fill: none; stroke-width: 4.3; stroke-linecap: round; }
.brand-symbol .arc-blue { stroke: var(--cyan); }
.brand-symbol .arc-red { stroke: var(--red); }
.brand-symbol .arc-green { stroke: var(--green); }
.brand-symbol .fill-blue { fill: var(--cyan); }
.brand-symbol .fill-red { fill: var(--red); }
.brand-symbol .fill-green { fill: var(--green); }
.brand-copy strong, .brand-copy small { display: block; }
.brand-copy strong { font-size: 17px; line-height: 1; letter-spacing: .7px; }
.brand-copy small { margin-top: 6px; color: var(--muted); font-size: 11px; font-weight: 750; line-height: 1; letter-spacing: 1.7px; text-transform: uppercase; }
.main-nav { display: flex; align-items: center; gap: 22px; }
.main-nav a { color: #3b4f62; font-size: 14px; font-weight: 700; }
.main-nav a:hover { color: var(--blue); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 0; border-radius: 10px; color: var(--navy); background: transparent; font-size: 25px; cursor: pointer; }

.btn { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 13px; padding: 13px 21px; font-weight: 800; line-height: 1.2; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-small { min-height: 42px; padding: 10px 17px; }
.btn-primary { color: #fff; background: var(--blue); box-shadow: 0 9px 25px rgba(7, 135, 209, .27); }
.btn-primary:hover { background: #0578ba; }
.btn-secondary { border: 1px solid rgba(255, 255, 255, .45); color: #fff; background: rgba(255, 255, 255, .1); }
.btn-light { color: var(--navy); background: #fff; }
.text-link { display: inline-block; color: var(--blue); font-weight: 800; }
.text-link:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid #f4b942; outline-offset: 3px; }

.hero { position: relative; min-height: 650px; display: grid; align-items: center; overflow: hidden; color: #fff; background: var(--navy); }
.hero-media { position: absolute; inset: 0; background-image: linear-gradient(90deg, rgba(3, 16, 28, .95) 0%, rgba(4, 24, 41, .82) 41%, rgba(4, 24, 41, .28) 72%, rgba(4, 24, 41, .16) 100%), url("assets/hero-alpes.webp"); background-size: cover; background-position: center; }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 4px; background: linear-gradient(90deg, var(--cyan) 0 42%, #fff 42% 58%, var(--red) 58% 100%); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(330px, .65fr); align-items: center; gap: 74px; padding-block: 94px; }
.eyebrow { display: inline-block; margin-bottom: 15px; color: var(--cyan); font-size: 12px; font-weight: 900; letter-spacing: 1.8px; line-height: 1.3; text-transform: uppercase; }
.hero h1 { margin: 0; max-width: 760px; font-size: clamp(46px, 6.2vw, 78px); line-height: .98; letter-spacing: -3px; }
.hero-copy > p { max-width: 680px; margin: 25px 0 31px; color: rgba(255, 255, 255, .84); font-size: 19px; line-height: 1.6; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; }
.trust-row { display: flex; flex-wrap: wrap; gap: 10px 19px; margin-top: 29px; color: rgba(255, 255, 255, .82); font-size: 13px; font-weight: 700; }
.trust-row span::before { content: "✓"; margin-right: 7px; color: #72d384; }
.hero-process { padding: 29px; border: 1px solid rgba(255, 255, 255, .18); border-radius: 25px; background: rgba(5, 25, 42, .76); box-shadow: 0 30px 70px rgba(0, 0, 0, .25); backdrop-filter: blur(18px); }
.process-label { display: block; margin-bottom: 20px; color: #d8f7ff; font-size: 14px; font-weight: 800; }
.hero-process ol { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.hero-process li { display: grid; grid-template-columns: 45px 1fr; gap: 13px; align-items: center; padding: 14px 0; border-top: 1px solid rgba(255, 255, 255, .12); }
.hero-process li > span { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 11px; color: #fff; background: var(--blue); font-size: 12px; font-weight: 900; }
.hero-process strong, .hero-process small { display: block; }
.hero-process strong { color: #fff; }
.hero-process small { margin-top: 2px; color: rgba(255, 255, 255, .68); font-size: 12px; line-height: 1.45; }
.hero-process > p { margin: 20px 0 0; color: #bdecc7; font-size: 13px; font-weight: 750; }

.stats { border-bottom: 1px solid var(--line); background: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stats-grid > div { min-height: 100px; display: grid; align-content: center; padding: 20px 18px; border-right: 1px solid var(--line); text-align: center; }
.stats-grid > div:last-child { border-right: 0; }
.stats strong, .stats span { display: block; }
.stats strong { color: var(--navy); font-size: 21px; line-height: 1.25; }
.stats span { margin-top: 4px; color: var(--muted); font-size: 13px; }

.section { padding: 90px 0; }
.section-alt { background: var(--light); }
.section-heading { max-width: 810px; margin-bottom: 40px; }
.section-heading h2, .split h2, .zone-box h2, .contact-grid h2, .aid-box h2, .service-hero h1, .legal-page h1 { margin: 0; color: var(--navy); font-size: clamp(32px, 4vw, 50px); line-height: 1.1; letter-spacing: -1.7px; }
.section-heading p, .lead { color: var(--muted); font-size: 17px; }

.service-selector-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.service-selector { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 7px 24px rgba(6, 26, 44, .05); }
.service-selector summary { min-height: 108px; display: flex; align-items: center; justify-content: space-between; padding: 23px; list-style: none; cursor: pointer; }
.service-selector summary::-webkit-details-marker { display: none; }
.service-main { display: flex; align-items: center; gap: 15px; }
.service-glyph { width: 54px; height: 54px; display: grid; flex: 0 0 54px; place-items: center; border: 1px solid currentColor; border-radius: 16px; font-size: 13px; font-weight: 900; letter-spacing: .4px; }
.service-glyph.cold { color: #058bd3; background: #edf8fe; }
.service-glyph.eco { color: #489b43; background: #eff9ef; }
.service-glyph.heat { color: #e84e41; background: #fff1ef; }
.service-glyph.water { color: #087eb9; background: #edf7fb; }
.service-main strong, .service-main small, .service-option strong, .service-option span { display: block; }
.service-main strong { color: var(--navy); font-size: 18px; line-height: 1.35; }
.service-main small, .service-option span { color: var(--muted); font-size: 13px; }
.chevron { color: var(--blue); font-size: 25px; transition: transform .2s ease; }
.service-selector[open] .chevron { transform: rotate(180deg); }
.service-options { padding: 9px; border-top: 1px solid var(--line); }
.service-option, .service-page-link { display: block; padding: 14px; border-radius: 13px; }
.service-option:hover { background: var(--light); }
.service-option strong { color: var(--navy); font-size: 14px; }
.service-page-link { margin: 7px 4px 3px; color: var(--blue); font-size: 13px; font-weight: 850; }
.urgent-service { margin-top: 20px; padding: 27px; display: flex; align-items: center; justify-content: space-between; gap: 25px; border-radius: 20px; color: #fff; background: var(--navy); }
.urgent-service strong { display: block; font-size: 19px; }
.urgent-service p { margin: 5px 0 0; color: rgba(255, 255, 255, .72); }
.urgent-actions { display: grid; gap: 9px; flex: 0 0 auto; text-align: center; }
.urgent-actions > a:last-child { color: rgba(255, 255, 255, .8); font-size: 12px; font-weight: 750; }
.urgent-actions > a:last-child:hover { color: #fff; text-decoration: underline; }
.urgent-badge { display: inline-block; margin-bottom: 7px; padding: 3px 9px; border-radius: 99px; color: #fff; background: var(--red); font-size: 11px; font-weight: 850; text-transform: uppercase; }

.price-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 17px; }
.price-card { padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.price-card.featured { border: 2px solid var(--blue); transform: translateY(-6px); }
.price-card > span { color: var(--blue); font-size: 12px; font-weight: 850; letter-spacing: .8px; text-transform: uppercase; }
.price-card h3 { min-height: 52px; margin: 8px 0 13px; color: var(--navy); line-height: 1.35; }
.price-card strong { color: var(--navy); font-size: 29px; }
.price-card strong small { font-size: 13px; }
.price-card p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.price-note { margin-top: 19px; padding: 18px 22px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.price-note a { color: var(--blue); font-weight: 800; }

.aid-box { display: grid; grid-template-columns: 1.2fr .8fr; gap: 55px; align-items: center; }
.aid-card { padding: 31px; border-radius: 23px; color: #fff; background: linear-gradient(135deg, var(--navy), #0b426a); box-shadow: var(--shadow); }
.aid-card strong { font-size: 25px; }
.aid-card p { color: rgba(255, 255, 255, .78); }
.section-dark { color: #fff; background: var(--navy); }
.section-dark .section-heading h2 { color: #fff; }
.qualification-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.qualification-grid article { padding: 29px; border: 1px solid rgba(255, 255, 255, .14); border-radius: 20px; background: rgba(255, 255, 255, .06); }
.q-icon { width: 50px; height: 50px; display: grid; place-items: center; border-radius: 14px; color: #fff; background: var(--blue); font-size: 13px; font-weight: 900; }
.qualification-grid p { color: rgba(255, 255, 255, .7); font-size: 14px; }
.qualification-note { margin: 25px 0 0; color: rgba(255, 255, 255, .64); font-size: 13px; }

.brand-cloud { display: flex; flex-wrap: wrap; gap: 11px; }
.brand-cloud span { padding: 12px 17px; border: 1px solid var(--line); border-radius: 11px; color: var(--navy); background: #fff; font-size: 13px; font-weight: 850; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 82px; }
.about-split { align-items: center; }
.signature { margin-top: 30px; padding-left: 18px; border-left: 4px solid var(--green); color: var(--navy); font-size: 22px; font-style: italic; line-height: 1.45; }
.check-list { display: grid; gap: 15px; }
.check-list > div { display: grid; grid-template-columns: 48px 1fr; gap: 16px; padding: 20px; border: 1px solid var(--line); border-radius: 17px; background: #fff; }
.check-list span { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; color: var(--blue); background: #e7f4ff; font-weight: 900; }
.check-list p { margin: 0; color: var(--muted); }
.check-list strong { color: var(--navy); }

.zone-box { display: grid; grid-template-columns: 1.15fr .85fr; gap: 55px; align-items: center; padding: 48px; border-radius: 28px; color: #fff; background: linear-gradient(135deg, var(--navy), #0b4d79); }
.zone-box h2 { color: #fff; }
.zone-box p { color: rgba(255, 255, 255, .76); }
.zone-tags { display: flex; flex-wrap: wrap; gap: 9px; }
.zone-tags span { padding: 9px 13px; border: 1px solid rgba(255, 255, 255, .19); border-radius: 99px; background: rgba(255, 255, 255, .08); font-size: 13px; }
.reviews { background: #fbfdff; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
blockquote { margin: 0; padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
blockquote div { color: #f2a007; letter-spacing: 2px; }
blockquote p { color: var(--navy); font-size: 16px; }
blockquote cite { color: var(--muted); font-size: 13px; font-style: normal; }
.review-link { margin-top: 25px; }

.contact-section { background: var(--light); }
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 65px; }
.contact-details { display: grid; gap: 13px; margin-top: 27px; }
.contact-details a, .contact-details > span { color: var(--navy); font-weight: 700; }
.contact-details a > span, .contact-details > span > span { width: 25px; display: inline-block; color: var(--blue); }
.contact-details small { color: var(--muted); }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.contact-form label { display: grid; gap: 7px; color: var(--navy); font-size: 14px; font-weight: 800; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; border: 1px solid #bdccd8; border-radius: 11px; padding: 13px 14px; color: var(--text); background: #fff; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--blue); outline: 0; box-shadow: 0 0 0 3px rgba(7, 135, 209, .13); }
.contact-form textarea { resize: vertical; }
.contact-form small { color: var(--muted); }
.contact-form small a { color: var(--blue); text-decoration: underline; }
.full { grid-column: 1 / -1; }
.honey { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }

.service-hero { padding: 76px 0; color: #fff; background: linear-gradient(135deg, var(--navy), #0c4f7f); }
.subpage-actions { display: flex; align-items: center; gap: 18px; }
.subpage-actions > a:first-child { color: var(--muted); font-size: 14px; font-weight: 750; }
.subpage-actions > a:first-child:hover { color: var(--blue); }
.service-hero .eyebrow { color: #74dcf0; }
.service-hero h1 { max-width: 850px; color: #fff; }
.service-hero p { max-width: 760px; color: rgba(255, 255, 255, .8); font-size: 18px; }
.breadcrumb { margin-bottom: 20px; color: rgba(255, 255, 255, .72); font-size: 13px; }
.breadcrumb a { text-decoration: underline; }
.service-content { display: grid; grid-template-columns: 1.25fr .75fr; gap: 55px; }
.service-content h2, .service-content h3 { color: var(--navy); }
.service-content h2 { font-size: clamp(28px, 3.5vw, 42px); line-height: 1.15; }
.service-content ul { padding-left: 21px; }
.service-content li { margin-bottom: 9px; }
.service-aside { align-self: start; padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--light); position: sticky; top: 100px; }
.service-aside h2 { margin-top: 0; font-size: 24px; }
.service-aside .btn { width: 100%; margin-top: 9px; }
.service-aside .btn-secondary { border-color: var(--line); color: var(--navy); background: #fff; box-shadow: none; }
.service-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 31px; }
.service-cards article { padding: 22px; border: 1px solid var(--line); border-radius: 17px; background: #fff; }
.service-cards h3 { margin: 0 0 8px; font-size: 18px; }
.service-cards p { margin: 0; color: var(--muted); font-size: 14px; }

.legal-page { max-width: 860px; }
.legal-page h1 { margin-bottom: 30px; }
.legal-page h2 { margin: 35px 0 8px; color: var(--navy); font-size: 23px; }
.legal-page p, .legal-page li { color: #455b6e; }
.legal-page a { color: var(--blue); text-decoration: underline; }
.notice { padding: 17px 19px; border-left: 4px solid var(--green); border-radius: 8px; background: #eef8ee; }
.status-page { min-height: 63vh; display: grid; place-items: center; text-align: center; }
.status-card { max-width: 690px; padding: 45px; border: 1px solid var(--line); border-radius: 25px; background: #fff; box-shadow: var(--shadow); }
.status-card h1 { margin: 0; color: var(--navy); font-size: clamp(34px, 6vw, 58px); }
.status-card p { color: var(--muted); }

footer { padding: 48px 0 20px; color: rgba(255, 255, 255, .73); background: #031522; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 38px; }
.footer-grid strong { color: #fff; }
.footer-grid p { margin: 7px 0; font-size: 13px; }
.footer-grid div:last-child { display: grid; gap: 7px; align-content: start; font-size: 13px; }
.footer-grid a:hover { color: #fff; text-decoration: underline; }
.copyright { margin-top: 34px; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, .1); font-size: 12px; }
.floating-call { display: none; position: fixed; right: 18px; bottom: 18px; z-index: 90; width: 58px; height: 58px; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); box-shadow: 0 12px 28px rgba(7, 135, 209, .34); font-size: 22px; }

@media (max-width: 1050px) {
  .main-nav { gap: 15px; }
  .main-nav a { font-size: 13px; }
}

@media (max-width: 980px) {
  .main-nav, .desktop-cta { display: none; }
  .menu-toggle { display: grid; place-items: center; }
  .main-nav.open { position: absolute; top: 78px; left: 0; right: 0; display: grid; gap: 0; border-bottom: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
  .main-nav.open a { padding: 15px 20px; border-top: 1px solid var(--line); font-size: 15px; }
  .hero { min-height: auto; }
  .hero-media { background-image: linear-gradient(90deg, rgba(3, 16, 28, .96), rgba(4, 24, 41, .7)), url("assets/hero-alpes.webp"); background-position: 61% center; }
  .hero-grid, .split, .zone-box, .contact-grid, .aid-box, .service-content { grid-template-columns: 1fr; }
  .hero-grid { gap: 39px; padding-block: 75px; }
  .hero-process { max-width: 620px; }
  .service-selector-grid { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr 1fr; }
  .qualification-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .split, .contact-grid, .aid-box, .service-content { gap: 40px; }
  .service-aside { position: static; }
}

@media (max-width: 650px) {
  .container { width: min(calc(100% - 28px), 1160px); }
  .brand-symbol { width: 43px; height: 43px; flex-basis: 43px; }
  .brand-copy strong { font-size: 14px; }
  .brand-copy small { font-size: 10px; }
  .subpage-actions > a:first-child { display: none; }
  .subpage-actions .btn { min-height: 40px; padding: 9px 12px; font-size: 12px; }
  .hero-grid { padding-block: 63px; }
  .hero h1 { font-size: clamp(42px, 14vw, 61px); letter-spacing: -2.2px; }
  .hero-copy > p { font-size: 17px; }
  .hero-actions .btn, .urgent-service .btn { width: 100%; }
  .urgent-actions { width: 100%; }
  .hero-process { padding: 23px; }
  .stats-grid > div { min-height: 88px; }
  .section { padding: 66px 0; }
  .section-heading { margin-bottom: 31px; }
  .service-selector summary { min-height: 98px; padding: 19px; }
  .service-main { gap: 12px; }
  .service-glyph { width: 48px; height: 48px; flex-basis: 48px; }
  .service-main strong { font-size: 16px; }
  .urgent-service { align-items: stretch; flex-direction: column; }
  .price-grid, .review-grid, .contact-form, .footer-grid, .service-cards { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .zone-box { padding: 29px 23px; }
  .full { grid-column: auto; }
  .floating-call { display: grid; }
  .status-card { padding: 33px 22px; }
}

@media (max-width: 380px) {
  .subpage-actions .btn { min-width: 68px; padding-inline: 10px; font-size: 0; }
  .subpage-actions .btn::after { content: "Devis"; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .chevron { transition: none; }
}