:root{--navy:#07162f;--navy2:#0b1b3f;--blue:#2167ae;--sky:#5db7ff;--red:#d81f26;--red2:#b9171f;--gold:#c89b3c;--cream:#f7f4ef;--paper:#fffaf1;--slate:#3d4656;--muted:#6b7280;--line:#e7eaf0;--white:#fff;--shadow:0 22px 70px rgba(7,22,47,.18);--radius:28px;--radius2:18px;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;color:var(--navy);background:linear-gradient(180deg,#fff 0%,var(--cream) 100%);line-height:1.55}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}p{color:#4c5668}.container{max-width:var(--max);margin:auto;padding:0 24px}.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:8px 13px;border:1px solid rgba(255,255,255,.2);border-radius:999px;background:rgba(255,255,255,.09);color:#fff;font-weight:800;font-size:12px;letter-spacing:.12em;text-transform:uppercase}.eyebrow.dark{background:#edf4ff;color:var(--blue);border-color:#d8e7fb}.topbar{background:var(--navy);color:#fff;font-size:13px}.topbar .container{display:flex;justify-content:space-between;gap:18px;padding-top:9px;padding-bottom:9px}.topbar a{opacity:.86}.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.88);backdrop-filter:blur(16px);border-bottom:1px solid rgba(7,22,47,.08)}.nav .container{display:flex;align-items:center;justify-content:space-between;gap:28px;padding-top:14px;padding-bottom:14px}.logo-wrap{display:flex;align-items:center;gap:12px}.logo-wrap img{width:190px}.navlinks{display:flex;align-items:center;gap:23px;font-weight:800;font-size:14px}.navlinks a:not(.btn){color:#16213a}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:999px;padding:14px 20px;font-weight:900;letter-spacing:.01em;cursor:pointer;transition:.25s ease;box-shadow:0 12px 28px rgba(216,31,38,.22)}.btn.red{background:linear-gradient(135deg,var(--red),#ff3942);color:#fff}.btn.red:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(216,31,38,.3)}.btn.ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.26);box-shadow:none}.btn.light{background:#fff;color:var(--navy);box-shadow:0 12px 35px rgba(7,22,47,.12)}.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 82% 16%,rgba(93,183,255,.35),transparent 30%),linear-gradient(135deg,#071226 0%,#0b1b3f 55%,#143f79 100%);color:#fff}.hero:before{content:"";position:absolute;inset:0;background:url('assets/img/hero-about.png') center/cover;opacity:.15;mix-blend-mode:screen}.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,18,38,.9),rgba(7,18,38,.55),rgba(7,18,38,.78))}.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;min-height:760px;padding-top:86px;padding-bottom:86px}.hero h1{font-size:clamp(46px,6vw,88px);line-height:.93;margin:18px 0 20px;letter-spacing:-.065em}.hero p.lead{font-size:clamp(18px,2vw,24px);color:#dfe8f6;max-width:640px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:32px 0}.proof-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:34px}.proof{border:1px solid rgba(255,255,255,.17);background:rgba(255,255,255,.08);border-radius:18px;padding:16px}.proof b{display:block;font-size:22px;color:#fff}.proof small{color:#cbd8ea;font-weight:700}.hero-card{position:relative}.diagnostic{background:rgba(255,255,255,.96);color:var(--navy);border-radius:34px;padding:24px;box-shadow:var(--shadow);transform:rotate(1deg)}.diagnostic .screen{border-radius:24px;background:linear-gradient(180deg,#f4fbff,#fff);padding:24px;border:1px solid #e4edf7;position:relative;overflow:hidden}.airflow{height:220px;border-radius:22px;background:linear-gradient(160deg,#0b1b3f,#2167ae);position:relative;overflow:hidden}.airflow svg{position:absolute;inset:0;width:100%;height:100%}.wave{stroke:#81d4ff;stroke-width:4;fill:none;stroke-dasharray:10 16;animation:flow 2s linear infinite;filter:drop-shadow(0 0 8px rgba(129,212,255,.8))}.heat{position:absolute;left:24px;bottom:24px;background:#fff;border-radius:18px;padding:16px;box-shadow:0 18px 40px rgba(7,22,47,.18)}.heat b{font-size:38px;color:var(--red);line-height:1}.mascot{position:absolute;right:-18px;bottom:-34px;width:190px;filter:drop-shadow(0 26px 30px rgba(7,22,47,.28));animation:float 4s ease-in-out infinite}.section{padding:92px 0}.section.dark{background:linear-gradient(135deg,var(--navy),#0c2a5a);color:#fff}.section.dark p{color:#cfdbeb}.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}.h2{font-size:clamp(34px,4vw,58px);line-height:1;margin:12px 0 18px;letter-spacing:-.045em}.sub{font-size:18px;max-width:760px}.grid{display:grid;gap:22px}.grid.three{grid-template-columns:repeat(3,1fr)}.grid.four{grid-template-columns:repeat(4,1fr)}.card{background:#fff;border:1px solid rgba(7,22,47,.08);border-radius:var(--radius);padding:28px;box-shadow:0 16px 45px rgba(7,22,47,.07);position:relative;overflow:hidden}.card h3{font-size:24px;line-height:1.1;margin:10px 0}.icon{width:52px;height:52px;border-radius:17px;background:linear-gradient(135deg,#eaf5ff,#fff);display:grid;place-items:center;color:var(--blue);font-size:25px}.card.feature{background:linear-gradient(180deg,#fff,#fbfdff)}.card.feature:before{content:"";height:5px;background:linear-gradient(90deg,var(--red),var(--blue));position:absolute;left:0;right:0;top:0}.media-card{border-radius:34px;overflow:hidden;box-shadow:var(--shadow);background:#fff}.media-card img{height:470px;width:100%;object-fit:cover}.badge-row{display:flex;gap:10px;flex-wrap:wrap}.badge{padding:9px 12px;border-radius:999px;background:#eef5ff;color:#174d87;font-weight:800;font-size:13px}.dark .badge{background:rgba(255,255,255,.12);color:#fff}.process{counter-reset:step}.step{display:grid;grid-template-columns:54px 1fr;gap:18px;align-items:start}.step:before{counter-increment:step;content:counter(step);width:54px;height:54px;border-radius:18px;background:var(--red);color:white;display:grid;place-items:center;font-weight:900;font-size:22px}.quote{font-size:26px;line-height:1.25;color:var(--navy);font-weight:850}.stars{color:var(--gold);letter-spacing:3px}.cta{border-radius:42px;padding:54px;background:radial-gradient(circle at right,rgba(93,183,255,.35),transparent 36%),linear-gradient(135deg,var(--navy),#174d87);color:#fff;display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;overflow:hidden;position:relative}.cta p{color:#dce8f7}.page-hero{padding:88px 0;background:linear-gradient(135deg,var(--navy),#174d87);color:#fff}.page-hero h1{font-size:clamp(40px,5vw,72px);line-height:.98;letter-spacing:-.05em;margin:10px 0 16px}.page-hero p{color:#dce8f7;font-size:20px;max-width:780px}.content{padding:70px 0}.content .container{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:42px}.article{background:#fff;border-radius:30px;padding:42px;box-shadow:0 16px 45px rgba(7,22,47,.07)}.article h2{font-size:34px;letter-spacing:-.03em}.sidebar{position:sticky;top:110px;align-self:start}.mini-cta{background:var(--navy);color:#fff;border-radius:28px;padding:28px}.mini-cta p{color:#dce8f7}.footer{background:#071226;color:#fff;padding:58px 0 28px}.footer p,.footer a{color:#cbd8ea}.footer-grid{display:grid;grid-template-columns:1.2fr repeat(3,1fr);gap:30px}.footer img{width:220px;filter:brightness(1.1)}.tiny{font-size:12px;color:#8290a8}@keyframes flow{to{stroke-dashoffset:-52}}@keyframes float{50%{transform:translateY(-12px) rotate(-2deg)}}@media(max-width:900px){.hero .container,.split,.content .container,.cta{grid-template-columns:1fr}.proof-row,.grid.three,.grid.four{grid-template-columns:1fr}.navlinks{display:none}.hero .container{min-height:auto}.footer-grid{grid-template-columns:1fr}.mascot{position:relative;right:auto;bottom:auto;margin:-30px auto 0}.logo-wrap img{width:150px}.topbar .container{display:block}.media-card img{height:310px}.section{padding:64px 0}}

/* Premium QA refinements */
.diagnostic{transform:none;border:1px solid rgba(7,22,47,.08)}
.diagnostic>img{border-radius:24px;margin-bottom:16px;background:#f7f4ef;border:1px solid #e7eaf0}
.section.dark .card p,.section.dark .card .quote{color:#16213a}.section.dark .card h3{color:#07162f}.section.dark .card{background:#fff}.section.dark .card .stars{color:#c89b3c}.card.feature{display:flex;flex-direction:column;min-height:520px}.card.feature img{height:230px;width:100%;object-fit:contain;background:linear-gradient(180deg,#f8fbff,#fff);border-radius:22px;padding:16px;margin-bottom:6px}.card.feature:nth-child(3) img{object-fit:contain;background:#071226}.card.feature p{margin-top:auto}.media-card img[src*="ventilation-infographic"]{object-fit:contain;background:#fff;padding:22px}.hero:before{opacity:.10}.topbar{font-weight:650}.footer{border-top:6px solid var(--red)}.footer-grid{border-bottom:1px solid rgba(255,255,255,.12);padding-bottom:28px;margin-bottom:22px}.navlinks{gap:20px}.quote{color:#07162f}.mini-cta img{border-radius:20px;background:#f7f4ef;margin-bottom:16px}.article .card p{color:#4c5668}


/* Visual proof + time-on-page pass */
.proof-hero .container{align-items:center}.proof-hero h1{max-width:760px}.proof-photo-card{position:relative;overflow:hidden;background:#07162f;border:1px solid rgba(255,255,255,.18);box-shadow:0 30px 90px rgba(0,0,0,.34)}.proof-photo-card figure{margin:0;position:relative}.proof-photo-card figure img{height:430px;width:100%;object-fit:cover;border-radius:26px;filter:saturate(1.05) contrast(1.04)}.proof-photo-card figcaption{position:absolute;left:18px;right:18px;bottom:18px;padding:14px 16px;border-radius:18px;background:rgba(7,22,47,.84);backdrop-filter:blur(12px);color:#fff;font-weight:750}.proof-photo-card figcaption b{color:#fff}.thermal-card{position:absolute;right:22px;top:22px;width:178px;padding:16px;border-radius:22px;background:linear-gradient(160deg,#fff,#fff3e0);box-shadow:0 20px 50px rgba(0,0,0,.22);border:1px solid rgba(216,31,38,.2)}.thermal-card small,.thermal-card span{display:block;color:#4c5668;font-weight:800;font-size:12px}.thermal-card b{display:block;font:900 48px/1 Montserrat,Inter,sans-serif;color:#d81f26;margin:5px 0}.report-chip{position:absolute;left:22px;top:22px;padding:10px 14px;border-radius:999px;background:#d81f26;color:#fff;font-weight:900;box-shadow:0 14px 32px rgba(216,31,38,.32)}.proof-mascot{position:absolute;width:82px!important;right:26px;bottom:26px;background:#fff;border:4px solid #fff;border-radius:999px;box-shadow:0 16px 35px rgba(0,0,0,.22)}.trust-strip{background:#fff;border-bottom:1px solid var(--line);box-shadow:0 14px 40px rgba(7,22,47,.05)}.trust-strip .container{display:grid;grid-template-columns:repeat(4,1fr);gap:0}.trust-strip .container>div{padding:20px 22px;border-right:1px solid var(--line)}.trust-strip b,.trust-strip span{display:block}.trust-strip b{font:900 16px Montserrat,Inter,sans-serif}.trust-strip span{font-size:13px;color:#5b6475}.symptom-section{background:linear-gradient(180deg,#fff,#f7fbff)}.symptom-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:22px}.symptom-grid button{appearance:none;border:1px solid #dbe5f3;background:#fff;border-radius:16px;padding:15px;text-align:left;color:#07162f;font-weight:900;cursor:pointer;box-shadow:0 10px 25px rgba(7,22,47,.06);transition:.18s ease}.symptom-grid button:hover,.symptom-grid button.active{border-color:#d81f26;background:#fff5f5;transform:translateY(-2px)}.symptom-output{border-radius:30px;background:radial-gradient(circle at top right,rgba(216,31,38,.16),transparent 45%),#07162f;color:#fff;padding:34px;box-shadow:var(--shadow);min-height:330px;display:flex;flex-direction:column;justify-content:center}.symptom-output span{color:#83c9ff;text-transform:uppercase;letter-spacing:.14em;font-size:12px;font-weight:900}.symptom-output h3{font:900 34px/1.06 Montserrat,Inter,sans-serif;margin:12px 0}.symptom-output p{color:#d6e3f5}.process-proof .step{overflow:hidden;padding:18px}.step-photo,.step-img{width:100%;height:145px;border-radius:18px;margin-bottom:16px;object-fit:cover;background:#0d244b;position:relative;overflow:hidden}.step-img{object-fit:contain;background:#fff;padding:10px}.step-photo span{position:absolute;left:14px;top:12px;color:#fff;font:900 28px Montserrat,Inter,sans-serif}.attic-texture{background:linear-gradient(135deg,#2b160d,#9b4a18 45%,#f7b85d)}.attic-texture:after{content:"";position:absolute;inset:35px 0 0;background:repeating-linear-gradient(90deg,rgba(255,255,255,.18) 0 8px,transparent 8px 34px);clip-path:polygon(0 70%,50% 5%,100% 70%,100% 100%,0 100%)}.diagram-mini{background:#07162f}.diagram-mini:after{content:"";position:absolute;inset:30px 18px;background:linear-gradient(135deg,transparent 45%,rgba(93,183,255,.65) 46% 53%,transparent 54%),radial-gradient(circle at 78% 24%,#d81f26 0 10px,transparent 12px);border:2px solid rgba(255,255,255,.22);clip-path:polygon(0 58%,50% 10%,100% 58%,100% 100%,0 100%)}.report-mini{background:linear-gradient(180deg,#fff,#edf4ff)}.report-mini:before{content:"";position:absolute;left:58px;right:22px;top:35px;height:14px;background:#d81f26;border-radius:999px;box-shadow:0 30px 0 #2167ae,0 60px 0 #c89b3c}.report-mini span{color:#07162f}.card.feature{border-top:5px solid #d81f26}.card.feature h3{min-height:54px}.report-split{align-items:center}.report-card{background:#fff;border:1px solid #dfe8f5;border-radius:30px;padding:22px;box-shadow:var(--shadow)}.report-head{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:14px}.report-head span{font:900 24px Montserrat,Inter,sans-serif}.report-head b{padding:7px 10px;border-radius:999px;background:#edf4ff;color:#2167ae;font-size:12px}.report-row{display:flex;justify-content:space-between;gap:18px;padding:14px 0;border-bottom:1px solid #eef2f7}.report-row b{color:#07162f}.report-row span{color:#4c5668;text-align:right}.report-row.bad b{color:#d81f26}.report-row.warn b{color:#c28412}.report-row.good b{color:#16824f}.report-note{margin-top:16px;border-radius:18px;background:#07162f;color:#fff;padding:16px;font-weight:800}.airflow-explainer{border:1px solid #dfe8f5;background:#fff;border-radius:26px;padding:20px;margin:24px 0}.house{height:220px;position:relative;border-radius:20px;background:linear-gradient(180deg,#eff7ff,#fff);overflow:hidden;border:1px solid #e1e9f5}.roof{position:absolute;left:12%;right:12%;top:28%;height:90px;background:#07162f;clip-path:polygon(0 65%,50% 0,100% 65%,100% 100%,0 100%)}.hot-air,.cool-air{position:absolute;border-radius:999px;opacity:.8}.hot-air{right:16%;top:18%;width:var(--airflow-strength,55%);max-width:230px;height:13px;background:linear-gradient(90deg,#ffb36c,#d81f26);box-shadow:0 24px 0 rgba(216,31,38,.4),0 48px 0 rgba(216,31,38,.18)}.cool-air{left:10%;bottom:20%;width:calc(var(--airflow-strength,55%) * .8);max-width:210px;height:12px;background:linear-gradient(90deg,#5db7ff,#2167ae);box-shadow:0 -22px 0 rgba(33,103,174,.22)}.label{position:absolute;font-weight:900;font-size:12px;color:#07162f;background:#fff;padding:7px 10px;border-radius:999px}.label.top{right:20px;top:18px}.label.bottom{left:20px;bottom:18px}.slider-wrap{display:grid;gap:8px;margin-top:16px}.slider-wrap label{font-weight:900}.slider-wrap input{accent-color:#d81f26}.proof-gallery .proof-card{min-height:360px}.before-after{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:18px}.before-after div{min-height:145px;border-radius:20px;padding:15px;display:flex;flex-direction:column;justify-content:flex-end;color:#fff}.before-after div:first-child{background:radial-gradient(circle at 30% 25%,#ffbc73,#d81f26 55%,#541313)}.before-after div:last-child{background:radial-gradient(circle at 70% 25%,#bce6ff,#2167ae 60%,#07162f)}.before-after b,.before-after span{display:block;color:#fff}.proof-card>img{height:175px;width:100%;object-fit:contain;background:#fff;border-radius:20px;padding:12px;margin-bottom:18px}.map-proof{min-height:175px;border-radius:20px;background:linear-gradient(135deg,#07162f,#123b72);position:relative;overflow:hidden;margin-bottom:18px}.map-proof:before{content:"";position:absolute;inset:22px;background:radial-gradient(circle at 30% 40%,#d81f26 0 7px,transparent 8px),radial-gradient(circle at 60% 62%,#d81f26 0 7px,transparent 8px),radial-gradient(circle at 75% 30%,#c89b3c 0 7px,transparent 8px),linear-gradient(135deg,transparent 48%,rgba(255,255,255,.18) 49% 51%,transparent 52%);border:1px solid rgba(255,255,255,.18);border-radius:18px}.map-proof span{position:absolute;z-index:1;color:#fff;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:7px 10px;font-weight:850;font-size:12px}.map-proof span:nth-child(1){left:18px;top:18px}.map-proof span:nth-child(2){right:18px;bottom:18px}.map-proof span:nth-child(3){left:18px;bottom:18px}.cta-form{display:grid;grid-template-columns:1fr 420px;gap:28px;align-items:center}.mini-form{background:#fff;border-radius:24px;padding:20px;display:grid;gap:10px;box-shadow:0 18px 55px rgba(7,22,47,.16)}.mini-form label{font-weight:900;color:#07162f}.mini-form input,.mini-form select{width:100%;min-height:48px;border-radius:14px;border:1px solid #d7e0ed;padding:12px 14px;font:inherit;color:#07162f;background:#fff}.mini-form button{width:100%;margin-top:6px}.section.dark .proof-card p,.section.dark .proof-card h3{color:#07162f}@media(max-width:900px){.trust-strip .container{grid-template-columns:1fr 1fr}.trust-strip .container>div:nth-child(2n){border-right:0}.proof-photo-card figure img{height:330px}.thermal-card{position:static;margin:14px}.report-chip{font-size:12px}.cta-form{grid-template-columns:1fr}.symptom-grid{grid-template-columns:1fr}}@media(max-width:620px){.trust-strip .container{grid-template-columns:1fr}.trust-strip .container>div{border-right:0;border-bottom:1px solid var(--line)}.thermal-card{width:auto}.proof-mascot{width:64px!important}.hero-proof-row{grid-template-columns:1fr 1fr}.report-row{display:block}.report-row span{text-align:left;display:block}.proof-photo-card figure img{height:280px}.symptom-output h3{font-size:28px}}

/* QA polish after visual pass */
.process-proof .process{grid-template-columns:repeat(2,minmax(0,1fr));max-width:980px;margin-left:auto;margin-right:auto}.process-proof .step{display:grid;grid-template-columns:180px 1fr;gap:18px;align-items:center;min-height:210px}.process-proof .step h3{font-size:25px}.process-proof .step p{font-size:15px;line-height:1.5}.process-proof .step .step-photo,.process-proof .step .step-img{height:150px;margin-bottom:0}.card.feature img{background:linear-gradient(180deg,#f8fbff,#fff)!important;object-fit:contain!important;padding:18px!important;border:1px solid #e6edf6}.photo-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}.photo-thumbs span{height:62px;border-radius:12px;background:linear-gradient(135deg,#5d3925,#f1b66d 48%,#07162f);border:1px solid #e5eaf2}.photo-thumbs span:nth-child(2){background:linear-gradient(135deg,#07162f,#2167ae 55%,#eaf5ff)}.photo-thumbs span:nth-child(3){background:linear-gradient(135deg,#fff,#dfe8f5 48%,#d81f26)}.mini-form:after{content:'Photos and findings come before recommendations.';display:block;color:#5b6475;font-size:12px;font-weight:800;text-align:center}.topbar{font-size:14px}.proof-photo-card figure img{filter:saturate(1.08) contrast(1.08) brightness(1.06)}
@media(max-width:900px){.process-proof .process{grid-template-columns:1fr}.process-proof .step{grid-template-columns:150px 1fr}}@media(max-width:620px){.process-proof .step{display:block}.process-proof .step .step-photo,.process-proof .step .step-img{margin-bottom:14px;width:100%}}