:root{--green:#1A9E8F;--ink:#102f2c;--lime:#e1f6f2;--muted:#506661;--line:#d7e8e4;--deep:#096e64}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;color:var(--ink);font-family:'DM Sans',sans-serif;font-size:16px;line-height:1.6;background:#fff}a{color:inherit}.button{display:inline-flex;align-items:center;justify-content:center;gap:36px;background:var(--green);color:white;text-decoration:none;padding:17px 25px;border-radius:7px;font-size:15px;font-weight:700;transition:background .2s,transform .2s}.button:hover{background:#138578;transform:translateY(-2px)}.button span{font-size:20px}.button.small{padding:11px 19px;font-size:14px;gap:24px}.hero{display:grid;grid-template-columns:1fr 1fr;min-height:650px}.hero-copy{padding:68px 9% 52px 12%}.eyebrow{font-size:12px;letter-spacing:1.8px;font-weight:700;color:var(--green);margin-bottom:21px}h1,h2,h3{font-family:'Montserrat',sans-serif;line-height:1.12;letter-spacing:-1.7px;margin:0;font-weight:600}h1{font-size:clamp(42px,4.6vw,70px);letter-spacing:-3px}em{font-style:normal;color:var(--green)}.hero-copy>p{font-size:19px;margin:25px 0 16px}.hero-copy .subcopy{font-size:16px;color:var(--muted);max-width:400px;margin:0 0 29px}.hero-note{font-size:12px;color:var(--muted);margin-top:18px}.hero-photo{position:relative;background:#e7f3ef;overflow:hidden}.hero-photo img{width:100%;height:100%;position:absolute;object-fit:cover;object-position:65% center}.photo-label{position:absolute;bottom:34px;left:34px;background:#ffffffed;padding:19px 24px;border-radius:8px;font-size:11px;letter-spacing:1.4px;backdrop-filter:blur(8px)}.photo-label strong{font-size:16px;letter-spacing:0;font-weight:500}.ribbon{display:flex;justify-content:center;align-items:center;gap:35px;padding:23px;background:var(--green);color:#fff;font-size:15px}.ribbon-center{color:var(--lime)}.section{padding:85px 6%;max-width:1600px;margin:auto}.section-top{display:flex;align-items:end;justify-content:space-between;gap:50px;margin-bottom:38px}h2{font-size:clamp(30px,3vw,45px)}.section-top>p{max-width:360px;color:var(--muted);margin:0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.cards article{border:1px solid var(--line);padding:30px 28px;border-radius:12px;background:#f7fbfa}.number{font-size:12px;letter-spacing:1.2px;color:var(--green)}h3{font-size:24px;letter-spacing:-.6px}.cards h3{margin-top:33px}.cards p{color:var(--muted);font-size:15px;line-height:1.7;margin-bottom:0}.health-note{font-size:12px;color:var(--muted);margin:22px 0 0;max-width:1000px}.solution{display:grid;grid-template-columns:1fr 1fr;gap:7%;padding-top:30px}.product-visual{background:#edf8f5;border-radius:18px;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;padding:30px}.product-visual .eyebrow{align-self:start;font-size:11px}.product-visual img{width:100%;height:350px;object-fit:contain;mix-blend-mode:multiply}.product-caption{font-size:12px;letter-spacing:1.5px;padding:20px 0}.solution-copy>p{color:var(--muted)}.benefit{display:flex;gap:18px;margin:24px 0}.benefit>span{color:var(--green);font-size:13px;padding-top:2px}.benefit h3{font-family:'DM Sans';font-size:18px;font-weight:700;letter-spacing:0}.benefit p{font-size:14px;margin:5px 0 0;color:var(--muted)}.fine{font-size:12px}.closing{background:var(--green);text-align:center;max-width:none;color:white;padding:66px 6%}.closing .eyebrow{color:var(--lime)}.closing h2{font-size:44px}.closing p{color:#d5e7df}.button.light{background:var(--lime);color:var(--ink)}.faq{display:grid;grid-template-columns:1fr 1.3fr;gap:60px}.faq h2{font-size:32px;max-width:300px}details{border-bottom:1px solid var(--line)}summary{cursor:pointer;list-style:none;padding:20px 25px 20px 0;font-weight:600;position:relative}summary::after{content:'+';position:absolute;right:0}details[open] summary::after{content:'−'}details p{margin:0 0 20px;color:var(--muted);font-size:14px}.mobile-cta{display:none}a:focus-visible,summary:focus-visible{outline:3px solid #096e64;outline-offset:5px}@media(min-width:1600px){.hero{max-width:1600px;margin:auto}}@media(max-width:900px){.hero-copy{padding:45px 8%}.hero{min-height:600px}h1{font-size:49px}.ribbon{gap:17px;font-size:13px}.section{padding:60px 5%}.section-top{gap:25px}.cards article{padding:22px 18px}.solution{gap:5%}.product-visual{padding:20px}.product-visual img{height:290px}.solution .button{gap:15px;font-size:13px}.faq{gap:25px}}@media(max-width:600px){.hero{display:flex;flex-direction:column}.hero-copy{padding:37px 6% 34px}.eyebrow{font-size:10px;letter-spacing:1.4px;margin-bottom:18px}h1{font-size:49px;letter-spacing:-2px}.hero-copy>p{font-size:18px;margin:21px 0 12px}.hero-copy .subcopy{font-size:15px;max-width:350px}.hero-photo{height:345px}.hero-photo img{object-position:center 44%}.photo-label{left:20px;bottom:20px;padding:13px 17px}.hero-note{margin-top:13px}.ribbon{flex-wrap:wrap;gap:0 8px;padding:18px;font-size:12px}.ribbon span:last-child{display:none}.section{padding:48px 6%}.section-top{display:block;margin-bottom:25px}.section-top>p{margin-top:20px}h2{font-size:31px;letter-spacing:-1.1px}.cards{grid-template-columns:1fr;gap:13px}.cards article{padding:23px}.cards h3{font-size:25px;margin-top:18px}.cards h3 br{display:none}.cards p{font-size:15px;margin-top:12px}.health-note{line-height:1.6}.solution{grid-template-columns:1fr;gap:30px;padding-top:0}.product-visual img{height:250px}.product-visual .eyebrow{margin:0}.product-caption{padding:8px 0}.solution .button{font-size:14px;width:100%}.closing h2{font-size:31px}.faq{display:block}.faq h2{margin-bottom:15px}.faq summary{font-size:15px}.faq details p{font-size:14px}.mobile-cta{display:flex;position:fixed;bottom:0;left:0;right:0;justify-content:space-between;align-items:center;padding:12px 5%;background:#fff;border-top:1px solid var(--line);z-index:10;box-shadow:0 -3px 15px #00000008}.mobile-cta>span{font-size:12px}.mobile-cta .button{font-size:12px;padding:12px 14px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}

/* AIRTH brand and version choices */
.button,.ribbon,.closing{color:#fff}.ribbon-center,.closing .eyebrow,.closing p{color:#fff}.eyebrow,.number,.benefit>span{color:var(--deep)}.button.light{background:#fff}.product-visual{align-self:start}.version-picker{margin-top:32px;border-top:1px solid var(--line);padding-top:26px}.version-picker>h3{font-size:23px}.version-intro{font-size:15px;color:var(--muted);line-height:1.6}.version-options{display:grid;grid-template-columns:1fr 1fr;gap:12px}.version-card{display:flex;flex-direction:column;padding:20px 16px;border:1px solid #9cd9cf;border-radius:12px;background:#f2fbf8;min-width:0}.aqi-badge{font-size:14px;color:var(--deep);font-weight:700}.version-card h4{font-family:'Montserrat',sans-serif;font-size:20px;margin:12px 0 4px;line-height:1.3}.version-card>p{font-size:14px;margin:0;color:var(--muted)}.version-card ul{padding-left:18px;font-size:14px;line-height:1.6;margin:18px 0 22px}.version-card .button{margin-top:auto;padding:12px 10px;gap:10px;font-size:14px;width:100%}.fine{font-size:13px}@media(max-width:1100px) and (min-width:601px){.solution{grid-template-columns:.8fr 1.2fr;gap:4%}.version-options{grid-template-columns:1fr}.product-visual img{height:240px}}@media(max-width:600px){.faq{padding-bottom:110px}.version-options{grid-template-columns:1fr}.version-card{padding:22px}.version-card .button{font-size:15px}.version-picker>h3{font-size:23px}}

/* Keep the product alongside the complete desktop buying section. */
@media(min-width:601px){.solution>.product-visual{position:sticky;top:24px}.solution>.product-visual img{height:min(350px,50vh)}}
@media(max-width:600px){.solution>.product-visual{position:static}}