@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;600;700&family=Oswald:wght@500;600;700&display=swap');:root{--ink:#101a21;--navy:#102d3d;--orange:#ff6a1a;--gold:#ffc857;--ice:#eaf7fa;--paper:#fff;--muted:#5d6b73;--line:#d9e4e8}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:'DM Sans',sans-serif;line-height:1.65;background:#fff}a{color:#0a6580;text-decoration-thickness:1px;text-underline-offset:3px}header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 max(5vw,24px);border-bottom:1px solid var(--line);position:sticky;top:0;background:#fffffff2;backdrop-filter:blur(12px);z-index:9}.brand{font-family:Oswald,sans-serif;font-size:1.25rem;color:var(--navy);text-decoration:none;display:flex;align-items:center;gap:8px}.brand span span{color:var(--orange)}.flame{color:var(--orange);transform:rotate(45deg);display:inline-block}nav{display:flex;gap:24px}nav a{text-decoration:none;color:var(--ink);font-weight:700;font-size:.92rem}.menu{display:none;background:none;border:0;font-size:1.5rem}.hero{min-height:650px;background:linear-gradient(120deg,#edfafd 0 58%,#102d3d 58%);display:grid;grid-template-columns:1.2fr .8fr;align-items:center;padding:70px max(6vw,28px);overflow:hidden}.hero>div:first-child{max-width:790px}.kicker,.eyebrow{color:#d24c08;text-transform:uppercase;letter-spacing:.12em;font-size:.76rem;font-weight:800}h1,h2,h3{font-family:Oswald,sans-serif;line-height:1.08;color:var(--navy);margin:.3em 0}h1{font-size:clamp(2.8rem,6vw,5.6rem);letter-spacing:-.025em}h2{font-size:clamp(2rem,4vw,3.4rem)}h3{font-size:1.45rem}.lead{font-size:1.2rem;max-width:760px;color:#344851}.actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:22px 0}.primary,.amazon{display:inline-block;border:0;border-radius:6px;padding:14px 20px;font-weight:800;text-decoration:none;cursor:pointer}.primary{background:var(--orange);color:white}.amazon{background:#ffd36a;color:#352000}.disclosure{font-size:.82rem;color:#53636b;margin-bottom:6px}.trust{display:flex;gap:24px;padding:0;list-style:none;font-weight:700;font-size:.9rem}.heater-art{height:420px;position:relative}.case{width:245px;height:280px;border-radius:24px;background:linear-gradient(145deg,#ff8b34,#e54808);position:absolute;left:20%;top:20%;box-shadow:0 35px 80px #0008;border:7px solid #142630}.case i{display:block;width:115px;height:115px;border:12px solid #1e3541;border-radius:50%;margin:35px auto;background:repeating-radial-gradient(circle,#d9eef2 0 4px,#1d3642 5px 10px)}.case b{position:absolute;right:16px;top:12px;background:#172d39;color:#7af5c9;padding:6px 10px;border-radius:4px}.case b span{font-size:.55em}.case em{color:white;position:absolute;bottom:16px;left:25px;font:700 1.8rem Oswald}.air{position:absolute;height:22px;border-radius:50%;border-top:5px solid var(--gold);width:140px;right:0}.a1{top:33%}.a2{top:48%;right:-25px}.a3{top:63%}.quick{background:#fff3e9;border-left:5px solid var(--orange);padding:22px 26px;border-radius:0 8px 8px 0;margin:30px 0}.quick h2{font-size:1.55rem;margin-top:0}main>section{padding:80px max(6vw,28px)}.section-head{max-width:800px;margin-bottom:28px}.tool{background:var(--navy);color:white;padding:30px;border-radius:16px;box-shadow:0 20px 55px #14344924}.fields{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:20px}label{font-weight:700;display:block}input,select{width:100%;margin-top:6px;padding:13px;border-radius:6px;border:1px solid #b9cbd2;font:inherit;background:white;color:#182a33}.result{background:#173e51;border:1px solid #2d6277;padding:20px;border-radius:10px;margin-top:18px}.result span{display:block;color:#b5dbe7}.result strong{font:600 2rem Oswald;color:#fff}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{padding:26px;border:1px solid var(--line);border-radius:12px;background:white;box-shadow:0 8px 28px #1535480c}.card h3 a,.card h2 a{text-decoration:none;color:var(--navy)}.card p{color:var(--muted)}.text-link{font-weight:800}.compare{background:var(--ice)}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;background:white}th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line)}th{background:var(--navy);color:white}.safety{display:grid;grid-template-columns:1.3fr .7fr;gap:60px;background:#17313d;color:white}.safety h2,.safety a{color:white}.safety ul{font-weight:700}.content{max-width:1050px;margin:auto;padding:36px 24px 80px}.content h1{font-size:clamp(2.5rem,6vw,4.8rem)}.content article{max-width:820px;margin:auto}.crumb{font-size:.84rem;color:#63737a;margin-bottom:35px}.steps{display:grid;grid-template-columns:1fr 1fr;gap:16px}.steps>div{padding:20px;background:var(--ice);border-radius:10px}.steps b{display:grid;place-items:center;width:32px;height:32px;background:var(--orange);color:white;border-radius:50%}.check li{margin:8px 0}.article-list{display:grid;gap:10px;margin:20px 0}.article-list>a{display:flex;flex-direction:column;padding:18px 20px;border:1px solid var(--line);border-radius:8px;text-decoration:none}.article-list span{font-weight:800;color:var(--navy)}.article-list small{color:var(--muted)}.warning{background:#fff4d7;border:1px solid #f0c85f;padding:20px;border-radius:8px;margin:30px 0}footer{padding:50px max(6vw,28px);background:#0d2734;color:#d7e5e9;display:grid;grid-template-columns:2fr 1fr;gap:28px}footer .brand,footer a{color:white}footer>div:nth-child(2){display:grid;gap:6px}footer>p,footer>small{grid-column:1/-1;max-width:850px}@media(max-width:800px){header{height:auto;min-height:68px;flex-wrap:wrap;padding:15px 20px}.menu{display:block}header nav{display:none;width:100%;padding:16px 0;flex-direction:column}header.open nav{display:flex}.hero{grid-template-columns:1fr;background:linear-gradient(160deg,#edfafd 0 72%,#102d3d 72%);padding-top:50px}.heater-art{height:330px}.case{transform:scale(.75);left:10%}.trust{flex-direction:column;gap:4px}.fields,.cards,.steps,.safety{grid-template-columns:1fr}.safety{gap:15px}.content{padding-top:24px}footer{grid-template-columns:1fr}h1{font-size:2.8rem}}