@font-face{font-family:Manrope;src:url('assets/fonts/Manrope-Variable.ttf') format('truetype');font-style:normal;font-weight:200 800;font-display:swap}
:root{--ink:#101519;--ink2:#171e22;--ink3:#202a2e;--line:#38455c;--paper:#f2eee8;--text:#faf7f1;--muted:#a9b2b1;--accent:#e40032;--accent2:#88a8ef;--link:#94d3ff;--amazon:#ff9900;--amazon-button:#ff6200;--warm:#e0d9cf;--max:1320px}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--text);font:16px/1.55 Manrope,'Segoe UI',Arial,sans-serif;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
::selection{background:var(--accent);color:var(--ink)}
.shell{width:min(calc(100% - 72px),var(--max));margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,16,21,.96);backdrop-filter:blur(18px);border-bottom:1px solid #2b3940}
.header-top{height:27px;padding:0 max(36px,calc((100vw - var(--max))/2));display:flex;align-items:center;justify-content:space-between;gap:20px;background:#202d50;color:#d1dcf5;font:10px/1 Manrope,'Segoe UI',sans-serif;letter-spacing:.15em}
.header-main{height:86px;display:flex;align-items:center;gap:34px}
.brand{width:244px;height:70px;display:flex;align-items:center;justify-content:center;overflow:hidden;flex:none}
.brand img{width:94%;height:94%;object-fit:contain}
.main-nav{display:flex;align-items:center;gap:30px;margin-left:auto}
.main-nav a{font-size:13px;color:var(--link);transition:color .2s}
.main-nav a:hover,.main-nav a[aria-current]{color:var(--link)}
.menu-toggle{display:none;border:0;background:transparent;padding:8px;width:42px;height:42px}
.menu-toggle span{display:block;height:2px;background:var(--text);margin:6px 0}
.eyebrow,.overline,.section-number{font:12px/1.2 Manrope,'Segoe UI',sans-serif;letter-spacing:.19em;color:var(--accent2);font-weight:700;text-transform:uppercase}
#installation .overline,#faq .overline{color:var(--link)}
.product-info .overline{color:var(--link)}
.eyebrow{display:flex;align-items:center;gap:12px;color:var(--link)}
.eyebrow-line{display:inline-block;width:24px;height:2px;background:var(--accent)}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{font-family:Manrope,'Segoe UI',Arial,sans-serif;font-weight:700;letter-spacing:-.035em}
h1 em,h2 em{font-style:normal;color:var(--accent)}
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:32px;min-height:54px;padding:13px 22px;font:16px Manrope,sans-serif;text-transform:none;letter-spacing:0;transition:transform .2s,background .2s,color .2s}
.button:hover{transform:translateY(-3px)}
.button-accent{background:var(--accent);color:#fff}
.button-accent:hover{background:var(--accent);color:#fff}
.button-light{background:#f1f5f2;color:var(--ink)}
.text-link{font:600 17px Manrope,sans-serif;text-transform:none;color:var(--link);letter-spacing:.025em;border-bottom:1px solid var(--link);padding-bottom:6px;white-space:nowrap}
.text-link span{margin-left:24px}
.text-link:hover{color:#fff;border-color:#fff}
.hero{position:relative;isolation:isolate;overflow:hidden;background:#101722;border-bottom:1px solid var(--line)}
.hero-content{min-height:760px;position:relative;z-index:2;display:flex;align-items:center}
.hero-copy{width:min(56%,650px);min-width:0;padding:52px 0 55px;position:relative;z-index:2}
.hero-logo{display:block;width:min(90%,460px);height:205px;object-fit:contain;margin:-20px 0 8px -13px}
.hero h1{font-size:clamp(60px,6vw,91px);line-height:1.02;letter-spacing:-.045em;margin:18px 0 24px;white-space:normal}
.hero-copy>p{font-size:18px;line-height:1.7;color:#c0cbcf;max-width:535px;margin-bottom:36px}
.hero-actions{display:flex;align-items:center;gap:34px;flex-wrap:wrap}
.hero-proof{display:flex;align-items:center;gap:14px;margin-top:54px;color:#8ea1a8;font:11px Manrope,sans-serif;letter-spacing:.16em}
.hero-proof i{width:3px;height:3px;border-radius:50%;background:var(--accent)}
.hero-atep-wrap{width:max-content;max-width:100%;margin-top:26px}
.hero-atep{display:block;width:312px;max-width:100%;height:auto}
.hero-atep-detail{display:block;margin-top:7px;color:#bdcadd;font:11px/1.4 Manrope,sans-serif}
.hero-photo{position:absolute;z-index:0;inset:0;width:100%;height:100%;overflow:hidden;background:#2c384c}
.hero-photo-image{width:100%;height:100%;object-fit:cover;object-position:center 63%}
.hero-photo-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(9,14,24,.98) 0%,rgba(9,14,24,.96) 23%,rgba(9,14,24,.7) 42%,rgba(9,14,24,.1) 72%,transparent 100%),linear-gradient(0deg,rgba(9,14,24,.42),transparent 32%);pointer-events:none}
.hero-big-air-logo{position:absolute;width:225px;height:110px;right:4%;top:7%;filter:drop-shadow(0 3px 8px #0008)}
.hero-big-air-logo img{width:100%;height:100%;object-fit:contain}
.hero-big-air-trademark{position:absolute;top:13px;right:5px;color:#fff;font:700 13px/1 Manrope,sans-serif}
.hero-photo-caption{position:absolute;right:3.5%;top:5%;font:700 11px Manrope,sans-serif;letter-spacing:.14em;color:#fff;text-shadow:0 2px 7px #000}
.hero-bottom{position:relative;z-index:2;display:flex;justify-content:space-between;padding:16px 0 19px;color:#82989f;font:10px Manrope,sans-serif;letter-spacing:.15em}
.intro-strip{background:#121b2a;border-bottom:1px solid var(--line)}
.intro-layout{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);align-items:center;gap:74px;padding-block:88px}
.intro-visual .section-number{display:block;margin-bottom:24px}
.intro-image{background:transparent;border:0}
.intro-image img{display:block;width:100%;height:auto;mask-image:radial-gradient(ellipse 115% 115% at center,#000 75%,transparent 100%)}
.intro-copy h2{font-size:clamp(46px,4.4vw,68px);line-height:1.08;margin:0 0 25px}
.intro-copy p{color:#c1cce0;font-size:17px;line-height:1.75;max-width:550px;margin:0}
.category-section,.featured,.related-section{padding-block:108px}
.category-section{background-color:#101519;background-image:linear-gradient(rgba(10,16,21,.74),rgba(10,16,21,.74)),url('assets/brand/heat-moisture-background.png');background-size:cover;background-position:30% center}
.heading-ampersand{font-family:Arial,Helvetica,sans-serif;font-weight:700}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:39px}
.section-head h2{font-size:clamp(48px,5vw,70px);line-height:1.02;margin:12px 0 0;letter-spacing:-.018em}
.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.category-card{background:#20282b;min-height:570px;padding:26px 29px 24px;position:relative;overflow:hidden;border:1px solid #33434b;transition:transform .25s,border-color .25s}
.category-card:hover{transform:translateY(-7px);border-color:var(--link)}
.category-card h3{display:flex;align-items:center;gap:10px;font-size:54px;line-height:1;margin:4px 0 15px}
.category-icon{display:block;flex:0 0 1em;width:1em;height:1em;background-position:center;background-repeat:no-repeat;background-size:contain}
.category-icon-passive{background-image:url('assets/brand/category-passive-icon.png')}
.category-icon-solar{background-image:url('assets/brand/category-solar-icon.png')}
.category-icon-electric{background-image:url('assets/brand/category-electric-icon.png')}
.category-card p{max-width:310px;color:#b6c4c7;line-height:1.6}
.category-card img{width:100%;height:264px;object-fit:contain;background:#fff;padding:20px;margin-top:20px}
.category-card strong{display:block;border-top:1px solid #49606a;margin-top:22px;padding-top:17px;color:var(--link);font:600 16px Manrope,sans-serif;text-transform:none}
.showcase{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:70px;padding-block:88px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.showcase-visual{background:transparent;display:grid;place-items:center}
.showcase-visual img{display:block;width:100%;height:auto}
.showcase-copy h2{font-size:clamp(50px,5vw,75px);line-height:1.06;margin:18px 0 26px}
.showcase-copy p{max-width:470px;color:#bbc8ca;font-size:17px;line-height:1.7;margin-bottom:26px}
.product-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}
.product-card{min-width:0;background:#1d272a;border:1px solid #32424a;display:flex;flex-direction:column;transition:transform .2s,border-color .2s}
.product-card:hover{transform:translateY(-4px);border-color:var(--accent)}
.card-media{height:252px;background:#fff;position:relative;display:flex;align-items:center;justify-content:center;padding:28px;overflow:hidden}
.card-media img{display:block;max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.card-tag{position:absolute;top:13px;left:13px;z-index:1;padding:5px 9px;background:#233e79;color:#f2f6ff;font:10px Manrope,sans-serif;text-transform:uppercase;letter-spacing:.1em}
.card-body{padding:23px 20px 19px;display:flex;flex-direction:column;flex:1}
.card-kicker{display:flex;align-items:center;gap:7px;font:11px Manrope,sans-serif;color:#ff5c80;letter-spacing:.05em;text-transform:uppercase;min-height:30px}
.card-kicker-icon{display:block;width:32px;height:32px;flex:none;object-fit:contain}
.card-body h3{font-size:30px;line-height:1.1;margin:9px 0 12px}
.card-body p{font-size:13px;line-height:1.58;color:#b0bfc3;margin-bottom:24px;flex:1}
.card-actions{border-top:1px solid #3c4b52;padding-top:15px;display:flex;flex-wrap:wrap;gap:11px 18px;align-items:center;justify-content:space-between;font:12px Manrope,sans-serif;text-transform:none;letter-spacing:0}
.card-actions a:last-child{color:var(--amazon)}
.card-actions a:hover{text-decoration:underline}
.guide-banner{background:#1d325b;padding-block:74px}
.guide-banner-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:100px;align-items:center}
.guide-banner h2{font-size:clamp(48px,6vw,70px);line-height:1.03;margin:0}
.guide-banner p{font-size:19px;max-width:470px;color:#e3ebfb;line-height:1.65;margin-bottom:27px}
.site-footer{background:#0c1114;padding-top:68px;border-top:1px solid #27343a}
.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:62px;padding-bottom:66px}
.footer-grid>div:first-child{max-width:290px}
.footer-logo{width:250px;height:120px;object-fit:contain;margin:0 0 18px -8px}
.footer-grid p{font-size:13px;line-height:1.7;color:#9fb1b6}
.footer-grid h3{font-size:20px;margin:0 0 17px}
.footer-grid a{display:block;font-size:13px;color:#adbec2;margin:0 0 10px}
.footer-grid a:hover{color:var(--link)}
.footer-bottom{border-top:1px solid #2a363b;display:flex;justify-content:space-between;gap:20px;padding:20px 0 29px;font-size:11px;color:#82969d}
.subhero{padding-top:90px;padding-bottom:80px;border-bottom:1px solid var(--line);background:linear-gradient(90deg,rgba(9,14,24,.98),rgba(9,14,24,.85) 52%,rgba(9,14,24,.48)),url('assets/brand/container-vent-hero-replacement.png') center 62%/cover no-repeat}
.subhero h1{font-size:clamp(65px,8vw,110px);line-height:.96;letter-spacing:-.038em;margin:26px 0 22px}
.subhero p{font-size:18px;color:#bac8cb;max-width:670px;line-height:1.7;margin:0}
.shop-section{padding-block:55px 110px}
.shop-tools{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:14px}
.filter-list{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.filter-button{background:transparent;color:#aebfc3;border:1px solid #38505a;padding:12px 17px;font:15px Manrope,sans-serif;text-transform:none;white-space:nowrap}
.filter-button span{color:#78959d;margin-left:8px;font:11px Manrope,sans-serif}
.filter-button.active,.filter-button:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.filter-button.active span,.filter-button:hover span{color:#fff}
.search-wrap{display:flex;align-items:center;min-width:270px;border-bottom:1px solid #55707a}
.search-wrap input{width:100%;border:0;outline:0;background:transparent;color:#fff;padding:13px 5px}
.search-wrap input::placeholder{color:#8ca3aa}
.search-wrap>span:last-child{font-size:24px;color:var(--accent)}
.results-count{color:#8fa2a8;font-size:12px;letter-spacing:.06em;margin:0 0 25px}
.no-results{border:1px solid var(--line);padding:40px;text-align:center;color:#b8c9ca}
.guide-section{padding-block:100px;border-bottom:1px solid var(--line)}
.compare-section .section-head h2{margin-top:0}
.comparison{border:1px solid #3c515a}
.compare-head,.compare-row{display:grid;grid-template-columns:1fr 2.2fr 2fr .7fr;gap:25px;padding:24px 28px;align-items:center}
.compare-head{background:#1e2b49;color:#a8bee9;font:11px Manrope,sans-serif;letter-spacing:.15em}
.compare-row{border-top:1px solid #364a53;color:#b6c5c8;font-size:15px}
.compare-row strong{font:600 32px Manrope,sans-serif;color:#fff}
.compare-row strong{display:inline-flex;align-items:center;gap:12px}
.compare-row strong img{width:30px;height:30px;object-fit:contain;flex:none}
.compare-row a{color:var(--link);font:600 15px Manrope,sans-serif}
.installation-intro{max-width:660px;margin:16px 0 0;color:#b7c5c8;font-size:16px;line-height:1.7}
.installation-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;list-style:none;margin:0;padding:0}
.installation-card{overflow:hidden;border:1px solid #384b70;background:#1a2439}
.installation-photo{aspect-ratio:245/198;background-color:#233343;background-image:url('assets/guides/big-air-45-installation-sheet.png');background-repeat:no-repeat;background-size:520.4% auto;border-bottom:1px solid #384b70}
.installation-photo-mark{background-position:0% 51.45%}
.installation-photo-cut{background-position:0% 65.22%}
.installation-photo-place{background-position:0% 94.35%}
.installation-photo-drill{background-position:61.94% 51.45%}
.installation-photo-fasten{background-position:61.94% 65.22%}
.installation-photo-seal{background-position:61.94% 79.1%}
.installation-card-copy{padding:25px 26px 29px}
.installation-number{display:block;margin-bottom:13px;color:var(--link);font:700 12px Manrope,sans-serif;letter-spacing:.18em}
.installation-card h3{font-size:clamp(23px,2.4vw,30px);line-height:1.15;margin:0 0 10px}
.installation-card p{font-size:14px;line-height:1.65;color:#b7c5c8;margin:0}
.guide-note{margin-top:23px;padding:23px 28px;border-left:3px solid var(--accent);background:#18253e;color:#c1cee7;font-size:14px;line-height:1.7}
.guide-note strong{color:#fff}
.faq-section{border-bottom:0}
.faq-section details{border-bottom:1px solid #3a4c54}
.faq-section summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:25px 0;font:600 26px Manrope,sans-serif}
.faq-section summary::-webkit-details-marker{display:none}
.faq-section summary:after{content:'+';font:32px Manrope,sans-serif;color:var(--accent)}
.faq-section details[open] summary:after{content:'−'}
.faq-section details p{max-width:760px;color:#b7c7c9;margin:0 0 28px;line-height:1.7}
.product-page-top{position:relative;background:#111b2b;border-bottom:1px solid var(--line)}
.product-brand-logo{position:absolute;top:17px;right:max(36px,calc((100vw - var(--max))/2));width:170px;height:82px}
.product-brand-logo img{width:100%;height:100%;object-fit:contain}
.product-brand-trademark{position:absolute;top:9px;right:2px;color:#fff;font:700 10px/1 Manrope,sans-serif}
.product-breadcrumb{display:flex;gap:12px;padding-block:24px;font-size:12px;color:#8fa4aa}
.product-breadcrumb a:hover{color:var(--link)}
.product-breadcrumb span:last-child{color:#dae5e4}
.product-hero{display:grid;grid-template-columns:1.07fr .93fr;gap:66px;align-items:stretch;padding-bottom:100px}
.product-media{min-width:0}
.product-image-panel{background:#fff;min-height:600px;padding:56px;position:relative;display:grid;place-items:center;overflow:hidden}
.product-image-panel img{width:100%;max-height:480px;object-fit:contain;z-index:1}
.product-image-label,.image-caption{position:absolute;z-index:2;color:#50717a;font:11px Manrope,sans-serif;letter-spacing:.13em}
.product-image-label{top:22px;left:24px}.image-caption{right:23px;bottom:20px}
.product-carousel{display:grid;grid-template-columns:36px minmax(0,1fr) 36px;gap:10px;align-items:center;padding:13px;background:#e8eceb}
.product-carousel-track{display:flex;gap:9px;min-width:0;overflow-x:auto;scrollbar-width:none;scroll-snap-type:x mandatory}
.product-carousel-track::-webkit-scrollbar{display:none}
.product-thumbnail{flex:0 0 82px;width:82px;height:82px;padding:5px;border:2px solid transparent;background:#fff;cursor:pointer;scroll-snap-align:start}
.product-thumbnail.active{border-color:var(--accent)}
.product-thumbnail img{width:100%;height:100%;object-fit:contain}
.product-carousel-arrow{width:36px;height:42px;border:1px solid #aebdc1;background:#fff;color:#192c36;font:24px Manrope,sans-serif;cursor:pointer}
.product-carousel-arrow:hover{border-color:var(--accent);color:var(--accent)}
.product-thumbnail:focus-visible,.product-carousel-arrow:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.product-carousel-count{margin:8px 0 0;color:#a9bec5;font:11px Manrope,sans-serif;letter-spacing:.08em;text-align:right}
.product-detail{padding:43px 0}
.product-detail h1{font-size:clamp(52px,5vw,78px);line-height:1.02;letter-spacing:-.025em;margin:30px 0 10px}
.product-variant{font:600 20px Manrope,sans-serif;color:var(--accent);margin:0 0 25px}
.product-summary{font-size:17px;line-height:1.75;color:#c1cdd0;max-width:550px}
.product-highlights{display:grid;gap:11px;border-top:1px solid #354b55;border-bottom:1px solid #354b55;margin:33px 0;padding:27px 0;font-size:14px;color:#d7e3e3}
.product-highlights i{font-style:normal;color:var(--accent);margin-right:11px}
.product-purchase .button{min-width:290px}
.product-purchase .button-accent{background:var(--amazon-button);color:#fff;font-size:19px;font-weight:700}
.product-purchase p{font-size:12px;color:#8fa5ab;margin:12px 0 0}
.product-id{margin-top:37px;color:#78909a;font-size:11px;letter-spacing:.1em}
.product-id strong{color:#b9cacc;font-weight:400;margin-left:9px}
.product-info{background:#1b2528;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.info-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:130px;padding-block:95px}
.info-grid h2{font-size:clamp(54px,6vw,84px);line-height:1.04;margin:15px 0 27px}
.info-grid p{max-width:540px;font-size:16px;color:#b8c8cb;line-height:1.75}
.product-copy-bullets{display:grid;gap:13px;max-width:580px;margin:25px 0 0;padding-left:22px;color:#d6e0e1;font:15px/1.65 Manrope,sans-serif}
.product-copy-bullets li{padding-left:4px}
.product-copy-bullets li::marker{color:var(--accent)}
.info-grid .product-copy-note{margin-top:25px;font-size:12px;line-height:1.6;color:#8ea6ac}
.product-copy-note a{color:#b8dcf5;text-decoration:underline;text-underline-offset:3px}
.spec-list{border-top:2px solid var(--accent)}
.spec-list h3{font-size:29px;margin:23px 0}
.spec-list>div{border-top:1px solid #3d5057;padding:15px 0;display:flex;justify-content:space-between;gap:15px;font-size:13px}
.spec-list>div span{color:#8ea6ac}.spec-list>div strong{font-weight:400;text-align:right}.spec-list>div a{color:var(--amazon)}
.related-section .product-grid{grid-template-columns:repeat(3,1fr)}
.product-card.compact .card-media{height:260px}
.airflow-feature{display:grid;grid-template-columns:.75fr 1.25fr;gap:50px;align-items:center;padding-block:90px;border-bottom:1px solid var(--line)}
.airflow-feature h2{font-size:clamp(48px,5vw,72px);line-height:1.04;margin:16px 0 25px}
.airflow-feature p{color:#bcc9ca;line-height:1.7;max-width:410px}
.airflow-feature-image{background:transparent;border:0}
.airflow-feature-image img{display:block;width:100%;height:auto;mask-image:radial-gradient(ellipse 115% 115% at center,#000 75%,transparent 100%)}
@media(max-width:1180px){.main-nav{gap:18px}.header-main{gap:20px}.header-cta{display:none}.hero h1{font-size:clamp(60px,7.5vw,86px)}.product-grid{grid-template-columns:repeat(3,1fr)}.featured .product-card:last-child{display:none}.category-card h3{font-size:56px}.intro-grid{gap:28px}.product-hero{gap:35px}}
@media(max-width:850px){.shell{width:min(calc(100% - 42px),var(--max))}.header-top{padding-inline:21px}.header-top span:last-child{display:none}.header-main{height:75px}.brand{width:175px;height:50px}.menu-toggle{display:block;margin-left:auto;order:3}.main-nav{display:none;position:absolute;top:102px;left:0;right:0;background:#101b23;border-bottom:1px solid #3e515b;padding:22px;flex-direction:column;align-items:stretch;gap:0;box-shadow:0 20px 30px #0008}.main-nav.open{display:flex}.main-nav a{font:600 18px Manrope,sans-serif;padding:13px 0;border-bottom:1px solid #30424a}.hero-grid{grid-template-columns:1fr;min-height:0}.hero-copy{padding:72px 0 0}.hero h1{font-size:clamp(58px,10vw,86px)}.hero-copy>p{max-width:650px}.hero-proof{margin-top:35px}.hero-art{min-height:530px}.hero-visual{width:min(62%,430px);right:11%;top:9%}.orbit-one{right:0;top:1%}.orbit-two{right:12%}.hero-index{left:3%;bottom:8%}.hero-badge{right:3%;bottom:10%}.intro-grid{grid-template-columns:1fr 1.4fr}.intro-grid p{grid-column:2}.category-grid{grid-template-columns:1fr 1fr}.category-card:last-child{grid-column:1/-1}.category-card:last-child img{width:50%;margin-inline:auto}.category-card{min-height:0}.category-card img{height:250px}.product-grid{grid-template-columns:repeat(2,1fr)}.featured .product-card:last-child{display:flex}.guide-banner-grid{gap:40px}.footer-grid{grid-template-columns:repeat(2,1fr);gap:35px}.compare-head,.compare-row{grid-template-columns:.9fr 1.6fr 1.5fr .5fr;gap:14px;padding:20px}.product-hero{grid-template-columns:1fr;gap:0}.product-image-panel{min-height:500px}.product-detail{padding:42px 0 0}.info-grid{gap:45px}}
@media(max-width:600px){.shell{width:calc(100% - 36px)}.header-top{height:24px;font-size:8px;padding-inline:18px}.header-main{height:66px}.brand{width:150px;height:42px;padding:5px}.main-nav{top:90px}.hero-copy{padding:57px 0 0}.eyebrow,.overline{font-size:10px}.hero h1{font-size:clamp(46px,12vw,68px);margin:20px 0}.hero-copy>p{font-size:15px;line-height:1.6;margin-bottom:26px}.hero-actions{gap:25px}.button{font-size:15px;min-height:50px;padding:12px 18px}.text-link{font-size:15px}.text-link span{margin-left:8px}.hero-proof{font-size:9px;margin-top:34px}.hero-art{min-height:380px}.hero-visual{width:65%;top:9%;right:10%;padding:12px;box-shadow:17px 18px 0 #0005}.orbit-one{width:370px;right:-21%;top:-5%}.orbit-two{width:260px;top:8%;right:3%}.hero-index{left:0;bottom:8%;gap:9px}.hero-index span{font-size:8px}.hero-index strong{font-size:16px}.hero-badge{width:133px;padding:12px;bottom:8%;right:0;box-shadow:8px 8px 0 #101519}.hero-badge span{font-size:8px}.hero-badge strong{font-size:16px;margin-top:5px}.hero-bottom{font-size:8px;gap:10px}.intro-grid{grid-template-columns:1fr;gap:19px;padding-block:48px}.intro-grid p{grid-column:1}.intro-grid h2{font-size:40px}.category-section,.featured,.related-section{padding-block:70px}.section-head{align-items:start;flex-direction:column;gap:20px}.section-head h2{font-size:49px}.category-grid{grid-template-columns:1fr}.category-card:last-child{grid-column:auto}.category-card{padding:22px;min-height:0}.category-card h3{font-size:49px;margin:21px 0 12px}.category-card p{font-size:14px}.category-card img,.category-card:last-child img{height:250px;width:100%}.statement-inner{padding-block:60px}.statement h2{font-size:clamp(43px,11vw,64px)}.statement-mark{display:none}.product-grid,.related-section .product-grid{grid-template-columns:1fr;gap:14px}.card-media{height:300px}.card-body h3{font-size:34px}.card-body p{font-size:14px}.card-actions{font-size:13px}.guide-banner{padding-block:61px}.guide-banner-grid{grid-template-columns:1fr;gap:27px}.guide-banner h2{font-size:49px}.guide-banner p{font-size:16px}.footer-grid{grid-template-columns:1fr 1fr;gap:38px 19px;padding-bottom:45px}.footer-grid>div:first-child{grid-column:1/-1}.footer-logo{width:180px;height:90px}.footer-bottom{flex-direction:column;font-size:10px}.subhero{padding-top:67px;padding-bottom:56px}.subhero h1{font-size:clamp(48px,12vw,68px)}.subhero p{font-size:15px}.shop-section{padding-block:36px 70px}.shop-tools{display:block}.filter-list{gap:5px}.filter-button{font-size:13px;padding:8px 10px}.filter-button span{font-size:9px;margin-left:3px}.search-wrap{margin-top:19px;min-width:0}.guide-section{padding-block:70px}.comparison{border:0}.compare-head{display:none}.compare-row{display:grid;grid-template-columns:1fr;gap:10px;border:1px solid #3a4e57;margin-bottom:12px;padding:24px;background:#1b2528}.compare-row strong{font-size:35px}.compare-row span{font-size:14px}.compare-row a{margin-top:5px}.steps{grid-template-columns:1fr}.steps>div{min-height:0}.steps h3{margin-top:23px}.faq-section summary{font-size:21px}.product-breadcrumb{flex-wrap:wrap;font-size:11px}.product-hero{padding-bottom:70px}.product-image-panel{min-height:360px;padding:35px 18px}.product-image-label,.image-caption{font-size:8px}.product-detail h1{font-size:clamp(43px,10vw,60px)}.product-variant{font-size:18px}.product-summary{font-size:15px}.product-highlights{font-size:13px}.product-purchase .button{min-width:0;width:100%}.info-grid{grid-template-columns:1fr;gap:30px;padding-block:70px}.info-grid h2{font-size:56px}}
@media(max-width:380px){.hero h1{font-size:47px;white-space:normal}.subhero h1{font-size:46px}.section-head h2{font-size:44px}.guide-banner h2{font-size:45px}.category-card h3{font-size:45px}.hero-proof{letter-spacing:.1em;gap:9px}.hero-badge{width:122px}.hero-index strong{font-size:14px}}
@media(max-width:600px){.product-carousel{grid-template-columns:32px minmax(0,1fr) 32px;gap:6px;padding:9px}.product-carousel-arrow{width:32px;height:38px}.product-thumbnail{flex-basis:68px;width:68px;height:68px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media(max-width:1180px){.hero-content{min-height:700px}.hero-copy{width:min(62%,630px)}.hero h1{font-size:clamp(54px,6.6vw,82px)}.hero-logo{width:min(86%,410px);height:184px}.intro-layout{gap:45px}}
@media(max-width:850px){.brand{width:190px;height:60px}.hero-content{min-height:0}.hero-copy{width:100%;max-width:650px;padding:42px 0 48px}.hero-logo{width:min(72%,400px);height:170px;margin:-16px 0 6px -9px}.hero h1{font-size:clamp(55px,9vw,82px)}.hero-photo{position:relative;inset:auto;height:500px}.hero-photo-image{object-position:67% center}.hero-photo-shade{background:linear-gradient(0deg,rgba(9,14,24,.46),transparent 38%)}.hero-proof{margin-top:37px}.intro-layout{gap:32px;padding-block:66px}.showcase{grid-template-columns:1fr;gap:35px;padding-block:62px}.showcase-visual{min-height:0}.showcase-visual img{max-height:480px}.airflow-feature{grid-template-columns:1fr;gap:28px}}
@media(max-width:600px){.brand{width:158px;height:50px}.hero-copy{padding:26px 0 34px}.hero-logo{width:min(88%,350px);height:150px;margin:-12px 0 2px -9px}.hero h1{font-size:clamp(46px,11vw,65px);line-height:1.04;white-space:normal;margin:18px 0 20px}.hero-copy>p{font-size:15px}.hero-photo{height:340px}.hero-photo-image{object-position:64% center}.hero-big-air-logo{display:none}.hero-photo-caption{font-size:8px;right:13px;top:15px}.hero-proof{margin-top:29px}.intro-layout{grid-template-columns:1fr;gap:26px;padding-block:54px}.intro-copy h2{font-size:40px;margin-bottom:18px}.intro-copy p{font-size:15px}.showcase{padding-block:54px}.showcase-visual img{max-height:340px}.showcase-copy h2{font-size:49px}.showcase-copy p{font-size:15px}.footer-logo{width:210px;height:100px}.airflow-feature{padding-block:65px}.airflow-feature h2{font-size:48px}}
@media(max-width:380px){.hero-logo{width:95%;height:135px}.hero-photo{height:315px}.hero h1{font-size:46px}}
@media(max-width:900px){.installation-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.installation-steps{grid-template-columns:1fr}.installation-card-copy{padding:22px 24px 26px}.installation-card h3{font-size:27px}.installation-intro{font-size:15px}.guide-note{padding:21px}}

.hero-heading-line{display:block;white-space:nowrap}
.hero h1{font-size:clamp(40px,4.7vw,64px)}
@media(max-width:850px){.hero h1{font-size:clamp(38px,7vw,60px)}}
@media(max-width:600px){.hero h1{font-size:clamp(23px,8vw,46px)}}

.brand img,.hero-logo,.footer-logo{object-fit:contain;object-position:center}
.hero-logo{width:min(100%,520px);height:150px}
.footer-logo{height:70px}
@media(max-width:850px){.hero-logo{height:125px}}
@media(max-width:600px){.hero-logo{height:90px}}
@media(max-width:380px){.hero-logo{height:78px}}

/* Header and hero refinements from the first design review. */
.header-main{height:144px;gap:24px}
.brand{width:min(39vw,488px);height:112px}
.main-nav{gap:30px}
.main-nav a{font-size:20px;color:var(--link)}
.main-nav a:hover,.main-nav a[aria-current]{color:var(--link);text-decoration:underline;text-underline-offset:6px}
.hero-content{min-height:560px;align-items:flex-start}
.hero-copy{padding:20px 0 50px}
.hero h1 em{color:inherit}
.intro-image{border:1px solid var(--line)}
.intro-copy h2 .intro-accent{color:#94d3ff}
@media(max-width:850px){.header-main{height:105px}.brand{width:300px;height:80px}.main-nav{top:132px}.main-nav a{font-size:20px}.hero-content{min-height:0}.hero-copy{padding:20px 0 48px}}
@media(max-width:600px){.header-main{height:82px}.brand{width:220px;height:60px}.main-nav{top:106px}.hero-copy{padding:16px 0 34px}}

.category-section .section-head h2{font-size:clamp(38px,5vw,70px);margin:0}
.category-section .section-head h2 em{white-space:nowrap}
.showcase-copy h2{margin-top:0}
.guide-banner-grid>div:first-child{min-width:0;container-type:inline-size}
.guide-banner h2{font-size:min(70px,9.5cqw)}
.guide-banner-heading-line{display:block;white-space:nowrap}
.featured{padding-top:34px}
.featured-actions{display:flex;justify-content:flex-end;margin-bottom:28px}
.intro-layout{max-width:1100px;grid-template-columns:minmax(0,306px) minmax(0,1fr);gap:75px;padding-block:42px}
.intro-visual{width:306px;max-width:100%}
.intro-copy{min-width:0;container-type:inline-size}
.intro-copy h2{font-size:min(clamp(46px,4.4vw,68px),8.8cqw)}
.intro-heading-line{display:block;white-space:nowrap}
@media(max-width:760px){.category-section .section-head{align-items:flex-start;flex-direction:column}}
@media(max-width:850px){.intro-layout{grid-template-columns:minmax(0,276px) minmax(0,1fr);gap:32px;padding-block:38px}.intro-visual{width:276px}}
@media(max-width:600px){.category-section .section-head h2{font-size:clamp(23px,5vw,32px)}.intro-layout{grid-template-columns:1fr;gap:24px;padding-block:36px}.intro-visual{width:100%;justify-self:center}.intro-copy h2{font-size:8.8cqw}}

/* Long-form video blog. */
.blog-index-heading .overline,.home-blog .section-head .overline,.blog-article-top .overline,.blog-article .overline{color:var(--link)}
.blog-card .overline{color:#ff5c80}
.blog-subhero{background-position:center 58%}
.blog-subhero h1{font-size:clamp(50px,6.6vw,88px);line-height:1.03}
.blog-subhero p a{color:#ff5c80;text-decoration:underline;text-underline-offset:3px}
.blog-index{padding-block:72px 110px}
.blog-index-heading{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:28px}
.blog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.blog-card{display:flex;flex-direction:column;min-width:0;background:#1c272b;border:1px solid #354951;transition:border-color .2s,transform .2s}
.blog-card:hover{border-color:var(--link);transform:translateY(-4px)}
.blog-card-image{display:block;position:relative;aspect-ratio:16/9;overflow:hidden;background:#202d36}
.blog-card-image img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.blog-card:hover .blog-card-image img{transform:scale(1.035)}
.blog-duration{position:absolute;right:12px;bottom:12px;background:#0b1117e8;padding:6px 9px;color:#fff;font:700 11px Manrope,sans-serif;letter-spacing:.04em}
.blog-card-body{display:flex;flex-direction:column;flex:1;padding:24px 24px 22px}
.blog-card-body h3{font-size:clamp(23px,2.3vw,31px);line-height:1.17;margin:13px 0 12px}
.blog-card-body h3 a:hover{color:var(--link)}
.blog-card-body p{font-size:14px;line-height:1.7;color:#b5c4c7;margin-bottom:27px;flex:1}
.blog-read-link{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #40515a;padding-top:15px;color:var(--link);font-weight:700;font-size:13px}
.home-blog{padding-block:90px 105px;background:#141f26;border-top:1px solid var(--line)}
.home-blog .section-head h2{font-size:clamp(45px,5vw,68px)}
.blog-article-top{padding-block:29px 55px;background:#14202a;border-bottom:1px solid var(--line)}
.blog-breadcrumb{display:flex;flex-wrap:wrap;gap:10px;color:#9eb2bb;font-size:12px}
.blog-breadcrumb a:hover{color:var(--link)}
.blog-article-heading{max-width:1030px;margin-top:64px}
.blog-article-heading h1{font-size:clamp(46px,6.4vw,84px);line-height:1.06;margin:18px 0 22px}
.blog-article-heading>p{font-size:19px;line-height:1.65;color:#c0ced2;max-width:760px;margin:0}
.blog-article{padding-block:56px 90px}
.blog-video{width:100%;aspect-ratio:16/9;background:#000;border:1px solid #405760}
.blog-video iframe{display:block;width:100%;height:100%;border:0}
.blog-video-poster{display:grid;place-items:center;position:relative;width:100%;height:100%;padding:0;border:0;background:#000;color:#fff;overflow:hidden}
.blog-video-poster::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,#0009,transparent 42%);pointer-events:none}
.blog-video-poster>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.blog-play{z-index:1;display:grid;place-items:center;width:86px;height:60px;padding-left:5px;border-radius:14px;background:#e40032;color:#fff;font-size:28px;transition:transform .2s,background .2s}
.blog-video-poster:hover .blog-play{transform:scale(1.08);background:#f42250}
.blog-play-label{position:absolute;z-index:1;bottom:21px;left:23px;font-size:14px;font-weight:700;text-shadow:0 2px 4px #000}
.blog-article-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:clamp(45px,7vw,120px);align-items:start;padding-top:65px}
.blog-prose{max-width:780px}
.blog-prose p{font-size:17px;line-height:1.85;color:#ced8da;margin-bottom:23px}
.blog-prose .blog-lead{font-size:21px;line-height:1.75;color:#f1f5f5;margin-bottom:48px}
.blog-prose h2{font-size:clamp(29px,3vw,39px);line-height:1.18;margin:48px 0 17px;color:#fff}
.blog-prose section:first-of-type h2{margin-top:0}
.blog-prose .blog-source{font-size:13px;line-height:1.8;color:#a9bdc4;border-top:1px solid #40515a;margin-top:47px;padding-top:24px}
.blog-source a{color:var(--link);text-decoration:underline;text-underline-offset:3px}
.blog-aside{position:sticky;top:175px;padding:24px;background:#202c31;border-top:2px solid var(--link)}
.blog-aside>.overline{display:block;margin-bottom:19px}
.blog-aside>a:not(.blog-aside-guide){display:grid;grid-template-columns:70px minmax(0,1fr);gap:13px;align-items:center;padding:12px 0;border-top:1px solid #40525a;font-size:14px;line-height:1.4;font-weight:700}
.blog-aside>a:not(.blog-aside-guide):hover{color:var(--link)}
.blog-aside img{width:70px;height:70px;object-fit:contain;background:#fff;padding:5px}
.blog-aside small{display:block;color:var(--link);font-size:11px;font-weight:600;margin-top:6px}
.blog-aside-guide{display:block;border-top:1px solid #40525a;margin-top:8px;padding-top:18px;font-size:13px;line-height:1.5;color:#b9c9cd}
.blog-aside-guide strong{display:block;color:var(--link);margin-top:5px}
.blog-back{border-top:1px solid #40515a;margin-top:65px;padding-top:27px}
@media(max-width:1180px){.header-main .brand{width:min(34vw,380px)}.blog-grid{gap:15px}.blog-card-body{padding:20px}}
@media(max-width:850px){.header-main .brand{width:300px}.blog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.blog-article-layout{grid-template-columns:1fr;gap:45px}.blog-aside{position:static;max-width:600px}.blog-index-heading{display:block}.blog-index-heading p{margin-top:14px}}
@media(max-width:600px){.header-main .brand{width:220px}.blog-subhero h1{font-size:clamp(40px,10vw,58px)}.blog-index{padding-block:48px 75px}.blog-grid{grid-template-columns:1fr}.home-blog{padding-block:68px}.blog-article-top{padding-bottom:43px}.blog-article-heading{margin-top:39px}.blog-article-heading h1{font-size:clamp(37px,10vw,54px)}.blog-article-heading>p{font-size:16px}.blog-article{padding-block:28px 65px}.blog-article-layout{padding-top:39px}.blog-prose .blog-lead{font-size:18px;margin-bottom:36px}.blog-prose p{font-size:15px}.blog-prose h2{margin-top:35px}}

/* Latest homepage and product refinements. */
.main-nav a{text-transform:uppercase}
.hero-proof{margin-top:22px}
.hero-bottom{justify-content:flex-end}
.product-info .info-grid h2 em{color:#94d3ff}
@media(max-width:850px){.hero-proof{margin-top:22px}}
@media(max-width:600px){.hero-proof{margin-top:18px}}
@media(max-width:850px){.product-brand-logo{position:relative;top:auto;right:auto;width:145px;height:70px;margin:0 21px 10px auto}}
@media(max-width:600px){.product-brand-logo{width:120px;height:58px;margin-right:18px}.product-brand-trademark{top:6px;font-size:8px}}
@media(max-width:600px){.guide-subhero h1{font-size:clamp(40px,10vw,60px)}}