.install-hero{background:linear-gradient(90deg,#000d 0%,#0009 55%,#0003 100%),url('assets/hero-range.avif') center/cover no-repeat}.install-hero .hero-content{padding-block:75px 78px}.install-hero h1{font-size:clamp(58px,5.8vw,80px);max-width:900px}.install-trust{display:flex;align-items:center;justify-content:space-between;gap:30px;padding-block:28px;border-bottom:1px solid var(--line)}.install-trust>p{font-size:8px;letter-spacing:1.5px;color:var(--muted)}.install-trust>img{display:block;width:280px;height:auto}.install-trust .text-link{font-size:11px}.workmanship-layout{display:grid;grid-template-columns:1.35fr 1fr;gap:55px;align-items:center}.installation-feature img{display:block;width:100%;height:375px;object-fit:cover}.installation-feature figcaption,.installation-gallery figcaption{font-size:10px;line-height:1.65;color:var(--muted);margin-top:15px;max-width:430px}.precision-details>div{padding:19px 0;border-top:1px solid var(--line)}.precision-details span{display:block;font-size:9px;letter-spacing:1px;color:var(--gold);margin-bottom:8px}.precision-details h3{font-family:var(--serif);font-size:27px;font-weight:400;line-height:1.2;margin-bottom:10px}.precision-details p{font-size:12px;color:var(--muted);line-height:1.85}.installation-gallery{display:grid;grid-template-columns:300px 1fr;gap:65px;align-items:center;max-width:870px;margin:60px auto 0}.installation-gallery figure>img{display:block;width:100%;height:350px;object-fit:cover;object-position:center 40%}.gallery-story h3{font-family:var(--serif);font-size:48px;font-weight:400;line-height:1.05;margin-bottom:22px}.gallery-story h3 em{font-style:normal;color:var(--gold)}.gallery-story>p:not(.eyebrow){font-size:13px;color:var(--muted);max-width:420px;margin-bottom:25px}.certification{background:linear-gradient(90deg,#111110f0,#111110e8),url('assets/gas-detail.avif') center/cover no-repeat;border-block:1px solid var(--line)}.certification-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:75px;align-items:center}.certification h2{margin-bottom:24px}.certification-layout>div>p:not(.eyebrow){font-size:13px;color:var(--muted);max-width:470px;margin-bottom:24px}.warranty-note{border:1px solid #6a5a35;padding:36px}.warranty-note h3{font-family:var(--serif);font-size:34px;font-weight:400;line-height:1.15;margin-bottom:20px}.warranty-note .eyebrow{font-size:8px}.warranty-note>p.warranty-small{font-size:11px;color:#a7a398}.warranty-note .text-link{font-size:11px}.process-link{margin-top:34px}.install-process{border-bottom:1px solid var(--line)}
@media(max-width:1000px){.site-header nav{gap:18px}.workmanship-layout{gap:32px}.installation-feature img{height:365px}.certification-layout{gap:38px}.install-trust>img{width:245px}.install-trust{gap:20px}.installation-gallery{gap:40px}}
@media(max-width:760px){.install-hero .hero-content{padding-block:53px 57px}.install-hero h1{font-size:clamp(44px,8.5vw,65px)}.install-hero .hero-tagline{font-size:23px}.install-trust{flex-wrap:wrap;justify-content:flex-start;gap:20px}.install-trust>p{flex-basis:100%}.install-trust>img{width:240px}.install-trust .text-link{margin-left:auto}.workmanship-layout{grid-template-columns:1fr;gap:28px}.installation-feature img{height:auto;aspect-ratio:980/462}.precision-details{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.precision-details h3{font-size:25px}.installation-gallery{grid-template-columns:220px 1fr;gap:30px;margin-top:35px}.gallery-story h3{font-size:40px}.certification-layout{grid-template-columns:1fr;gap:30px}.warranty-note{padding:28px}.certification-layout>div>p:not(.eyebrow){max-width:560px}}
@media(max-width:480px){.install-hero h1{font-size:43px}.install-hero .hero-tagline{font-size:22px}.install-trust{gap:16px}.install-trust>img{width:225px;max-width:100%}.install-trust .text-link{margin-left:0;flex-basis:100%;font-size:11px}.precision-details{grid-template-columns:1fr;gap:0}.precision-details h3{font-size:27px}.installation-gallery{grid-template-columns:1fr;gap:28px;margin-top:28px}.installation-gallery figure{max-width:100%}.installation-gallery figure>img{height:330px;object-position:center 37%}.gallery-story h3{font-size:42px}.warranty-note{padding:25px 23px}.warranty-note h3{font-size:31px}.warranty-note .text-link{line-height:1.6}.certification h2,.install-process h2{font-size:42px}}
@media(max-width:360px){.install-hero h1{font-size:38px}.install-trust>img{width:210px}.warranty-note{padding:23px 18px}.warranty-note h3{font-size:29px}}
.process-links{display:flex;flex-wrap:wrap;gap:20px 35px;margin-top:34px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.install-hero{background-image:linear-gradient(90deg,#000d 0%,#0009 58%,#0005 100%),url('assets/gas-detail.avif')}.install-hero .hero-content{padding-block:48px 52px}.installation-signature{position:relative;width:min(100%,580px);margin-bottom:44px}.installation-signature h1{font-size:58px;line-height:1.1;margin-bottom:7px}.last-artwork{display:block;width:100%;height:auto}.last-checkmark{position:absolute;right:3%;bottom:-38px;width:134px;height:120px;color:#d4bd80;filter:drop-shadow(0 2px 9px #0005)}.check-ring{animation:ring-appear 800ms ease both 400ms}.check-tick{animation:tick-reveal 950ms cubic-bezier(.22,1,.36,1) both 700ms}.install-hero .hero-tagline{margin-top:0}.install-trust>img{width:360px}.certification-artwork{display:block;width:min(100%,430px);height:auto;margin-bottom:25px}.certification .eyebrow{max-width:460px}
@keyframes ring-appear{from{opacity:0}to{opacity:1}}
@keyframes tick-reveal{from{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0)}}
@media(max-width:760px){.installation-signature{max-width:520px;margin-bottom:40px}.installation-signature h1{font-size:50px}.last-checkmark{width:120px;height:107px;bottom:-35px}.install-hero .hero-content{padding-block:42px 48px}.install-trust>img{width:300px;max-width:100%}}
@media(max-width:480px){.installation-signature h1{font-size:43px}.installation-signature{margin-bottom:42px}.last-checkmark{width:88px;height:79px;bottom:-36px;right:1%}.install-trust>img{width:100%;max-width:340px}.certification-artwork{margin-bottom:22px}}
@media(max-width:360px){.installation-signature h1{font-size:38px}.last-checkmark{width:80px;height:72px}}
@media(prefers-reduced-motion:reduce){.check-ring,.check-tick{animation:none;clip-path:none}}

/* Preserve the red control knobs as the mobile hero's visual focus. */
@media(max-width:760px){.install-hero{background-position:60% center;background-image:linear-gradient(180deg,#0009 0%,#0008 48%,#0005 72%,#0009 100%),url('assets/gas-detail.avif')}}