@font-face{font-family:Manrope;src:url(fonts/Manrope-700.woff2) format('woff2');font-weight:700;font-display:swap}@font-face{font-family:Manrope;src:url(fonts/Manrope-800.woff2) format('woff2');font-weight:800;font-display:swap}@font-face{font-family:Plex;src:url(fonts/Plex-400.woff2) format('woff2');font-weight:400;font-display:swap}@font-face{font-family:Plex;src:url(fonts/Plex-500.woff2) format('woff2');font-weight:500;font-display:swap}@font-face{font-family:Plex;src:url(fonts/Plex-600.woff2) format('woff2');font-weight:600;font-display:swap}
:root{--blue:#2563eb;--deep:#143a8b;--ink:#0e0e0e;--muted:#5c5c5c;--surface:#f4f4f4;--line:#dce3eb;--cool:rgba(37,99,235,.045);--container:1120px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:#fff;color:var(--ink);font:400 18px/1.6 Plex,Arial,sans-serif;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{font-family:Manrope,Arial,sans-serif;line-height:1.2;letter-spacing:-.04em;font-weight:700;margin:0 0 24px}h1{font-weight:800;font-size:48px;line-height:1.14}h2{font-size:36px}h3{font-size:23px;line-height:1.32;letter-spacing:-.025em}p{margin:0 0 20px;color:var(--muted)}a{color:var(--deep);text-underline-offset:4px}a:hover{color:var(--blue)}svg{display:block}button,input,summary{font:inherit}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}img{max-width:100%;height:auto}::selection{background:#dce8ff;color:var(--deep)}.container{width:min(var(--container),calc(100% - 112px));margin-inline:auto;position:relative}.skip-link{position:fixed;left:16px;top:-100px;background:var(--deep);color:white;padding:12px 20px;z-index:50}.skip-link:focus{top:12px}.site-header{height:112px;position:relative;z-index:5;background:white;border-bottom:1px solid #edf0f4}.header-inner{height:100%;display:flex;align-items:center;gap:38px}.brand{flex:none;display:block;width:92px;height:92px}.brand img{width:92px;height:92px;object-fit:contain}.site-nav{display:flex;align-items:center;gap:30px;margin-left:auto}.site-nav a{font-size:14px;color:var(--muted);text-decoration:none;padding:12px 0;position:relative}.site-nav a[aria-current=page]{color:var(--blue)}.site-nav a[aria-current=page]:after{content:'';height:2px;background:var(--blue);position:absolute;left:0;right:0;bottom:6px}.header-contact{font-size:14px;color:var(--ink);font-weight:600;text-decoration:none;display:flex;align-items:center;gap:14px}.header-contact .icon{width:18px}.menu-button{display:none}.icon{width:24px;height:24px;flex:none;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.button{display:inline-flex;gap:22px;align-items:center;justify-content:center;min-height:52px;padding:15px 23px;background:var(--blue);color:white;text-decoration:none;font-size:16px;font-weight:600;line-height:1.3;border:1px solid var(--blue);border-radius:4px;transition:background .18s,transform .18s;max-width:100%;text-align:left}.button:hover{background:var(--deep);color:white;border-color:var(--deep)}.button .icon{width:20px;height:20px;transition:transform .18s}.button:hover .icon{transform:translateX(3px)}.button:active{transform:translateY(1px)}.eyebrow{display:flex;align-items:center;gap:12px;font-size:11px;line-height:1.5;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:var(--deep);margin-bottom:26px}.eyebrow:before{content:'';width:26px;height:1px;background:var(--blue);flex:none}.section-number{font-size:12px;font-weight:500;color:var(--blue);letter-spacing:.06em}.blue{color:var(--blue)}.lp-main{position:relative;isolation:isolate;overflow:clip}.airflow-layer{position:absolute;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none;overflow:hidden}.airflow-line{fill:none;stroke:var(--blue);stroke-width:2;opacity:.48;vector-effect:non-scaling-stroke}.airflow-line:nth-child(2){stroke-width:1;opacity:.24}.airflow-line:nth-child(3){stroke-width:1;opacity:.13}.fallback-flow{position:absolute;right:12px;top:570px;bottom:120px;width:24px;border-right:1px solid #2563eb30;border-left:1px solid #2563eb18;border-radius:50% 0 0 50%;z-index:-1;pointer-events:none}.flow-ready .fallback-flow{display:none}.hero{padding:66px 0 40px}.hero-grid{display:grid;grid-template-columns:55% 45%;align-items:center;min-height:470px}.hero-copy{position:relative;z-index:1;padding-right:24px}.hero-copy>p{font-size:18px;max-width:550px}.hero-copy .coverage{font-size:13px;line-height:1.6;max-width:430px;margin-top:18px;margin-bottom:0;display:flex;align-items:flex-start;gap:8px}.coverage .icon{width:15px;height:18px;margin-top:2px;color:var(--blue)}.hero-copy .definition{font-size:14px;padding-left:12px;border-left:2px solid #2563eb45}.hero-visual{position:relative;align-self:stretch;min-height:380px;display:flex;align-items:center;justify-content:center}.air-illustration{width:calc(100% + 36px);max-width:none;flex:none;position:relative}.air-illustration svg{width:100%;height:auto}.visual-caption{position:absolute;left:50%;transform:translateX(-50%);bottom:26px;white-space:nowrap;font-size:10px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}.hero-bottom{display:flex;align-items:center;justify-content:space-between;padding:30px 0 10px;margin-top:30px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.hero-bottom a{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--muted)}.hero-bottom .icon{width:16px;height:16px}.section{padding:96px 0;position:relative}.section-heading{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:end;margin-bottom:40px}.section-heading h2{margin-bottom:0}.section-heading p{margin-bottom:0}.section-heading.single{display:block;max-width:720px}.section-kicker{margin-bottom:24px}.section-kicker span{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;font-size:10px;margin-left:18px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.cards.four{grid-template-columns:repeat(2,minmax(0,1fr))}.service-card{border-top:1px solid var(--line);padding:28px 0 14px;position:relative}.service-card:before{content:'';position:absolute;top:-1px;left:0;width:42px;height:2px;background:var(--blue)}.card-icon{height:40px;margin-bottom:28px;color:var(--blue)}.card-icon .icon{width:30px;height:30px}.service-card h3{font-size:22px;margin-bottom:16px;max-width:350px}.service-card p{font-size:16px;margin-bottom:0}.support-note{font-size:15px;margin:28px 0 0;padding:22px 26px;border-left:2px solid #2563eb70;background:var(--cool);line-height:1.65}.authority-box{background:var(--surface);padding:52px;display:grid;grid-template-columns:1.1fr 1fr;gap:64px;border-radius:6px}.authority-box p{font-size:16px}.authority-person{border-left:1px solid #cdd3da;padding-left:42px;display:flex;flex-direction:column;justify-content:center;position:relative}.authority-person .icon{width:40px;height:40px;color:var(--blue);margin-bottom:36px}.authority-person h3{font-size:31px;line-height:1.28;margin-bottom:12px}.authority-person .role{font-size:15px;color:var(--deep);margin:0 0 26px}.authority-person .person-note{font-size:13px;max-width:280px}.authority-box .button{margin-top:12px}.process-layout{display:grid;grid-template-columns:.88fr 1.12fr;gap:90px}.process-intro h2{max-width:440px}.process-intro>p{font-size:16px}.steps{list-style:none;padding:0;margin:0;counter-reset:steps}.step{counter-increment:steps;display:grid;grid-template-columns:38px 1fr;gap:20px;padding:0 0 28px;margin-bottom:28px;border-bottom:1px solid var(--line)}.step:last-child{margin-bottom:0}.step:before{content:'0' counter(steps);font-size:13px;color:var(--blue);padding-top:4px}.step h3{font-size:21px;margin-bottom:12px}.step p{font-size:16px;margin-bottom:0}.budget-factors{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.budget-factors li{font-size:12px;border:1px solid var(--line);padding:7px 12px;border-radius:3px;color:var(--deep)}.budget-note{font-size:14px!important}.faq-section{border-top:1px solid var(--line)}.faq-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px}.faq-layout .section-intro p{font-size:16px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list details:first-child{border-top:1px solid var(--line)}.faq-list summary{padding:23px 36px 23px 0;cursor:pointer;list-style:none;position:relative;font-size:17px;font-weight:500;line-height:1.5;color:var(--ink)}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'+';position:absolute;right:4px;top:22px;color:var(--blue);font-size:22px;font-weight:400}.faq-list details[open] summary:after{content:'−'}.faq-answer{font-size:16px;padding:0 32px 8px 0}.guide-link{margin-top:28px;padding:24px;background:var(--cool);font-size:15px;border-radius:4px}.guide-link p{margin-bottom:0}.guide-link a{font-weight:500}.closing{padding-top:36px;padding-bottom:96px}.closing-box{padding:56px 60px;background:linear-gradient(115deg,#f4f7fd,white);border:1px solid #dce5f5;border-radius:6px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}.closing-box h2{font-size:34px}.closing-box p{font-size:16px;margin-bottom:0}.closing-action{display:flex;flex-direction:column;align-items:flex-start}.closing-action small{font-size:12px;color:var(--muted);margin-top:16px;max-width:330px}.closing-action .icon{flex:none}.deliverables{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}.deliverable{position:relative;padding-top:32px;border-top:1px solid #2563eb55}.deliverable:before{content:'';position:absolute;left:0;top:-4px;width:7px;height:7px;background:var(--blue);border:2px solid white;border-radius:50%;box-shadow:0 0 0 1px var(--blue)}.deliverable .section-number{display:block;margin-bottom:24px}.deliverable h3{font-size:20px}.deliverable p{font-size:15px}.site-footer{border-top:1px solid var(--line);padding:46px 0 28px}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:44px}.footer-brand{display:flex;align-items:center;gap:18px}.footer-brand img{width:86px;height:86px}.footer-brand p{font-size:12px;margin:0;max-width:200px}.footer-label{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:16px}.footer-links{display:flex;flex-direction:column;gap:8px}.footer-links a{font-size:14px;text-decoration:none;color:var(--ink)}.footer-links a:hover{color:var(--blue)}.footer-bottom{border-top:1px solid var(--line);padding-top:22px;margin-top:36px;font-size:11px;color:var(--muted);display:flex;justify-content:space-between;gap:20px}.footer-bottom a{color:var(--muted)}.reveal.is-ready{animation:enter .5s both}@keyframes enter{from{opacity:.4;transform:translateY(12px)}to{opacity:1;transform:none}}
/* Editorial */
.editorial-hero{padding:70px 0 52px;position:relative;background:linear-gradient(170deg,#fff 70%,#f7faff);border-bottom:1px solid #edf1f7}.editorial-hero h1{max-width:870px}.editorial-hero p{max-width:710px}.editorial-hero .eyebrow{margin-bottom:22px}.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--muted);margin-bottom:38px}.breadcrumb a{color:var(--muted);text-decoration:none}.article-meta{font-size:12px;color:var(--muted);margin-top:26px}.editorial-lines{position:absolute;right:0;bottom:0;width:220px;height:110px;pointer-events:none;color:var(--blue);opacity:.22}.article-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:78px;padding-block:60px 96px}.article-body{max-width:760px;min-width:0}.article-body>p:first-child{font-size:20px;color:var(--ink);line-height:1.7}.article-body p,.article-body li{font-size:18px;line-height:1.8;color:#383838}.article-body h2{font-size:30px;margin:52px 0 22px;scroll-margin-top:32px}.article-body h3{font-size:22px;margin:32px 0 16px;scroll-margin-top:32px}.article-body ul,.article-body ol{padding-left:24px;margin-bottom:24px}.article-body li{padding-left:5px;margin-bottom:10px}.article-body li::marker{color:var(--blue)}.article-body strong{font-weight:600;color:var(--ink)}.article-body blockquote{margin:28px 0;padding:20px 24px;border-left:3px solid var(--blue);background:var(--cool)}.article-body blockquote p{font-size:16px;margin:0}.article-body a{overflow-wrap:anywhere}.table-scroll{overflow-x:auto;max-width:100%;margin:28px 0;border:1px solid var(--line);border-radius:4px}.article-body table{border-collapse:collapse;min-width:580px;width:100%;font-size:15px}.article-body th{text-align:left;background:var(--cool);color:var(--deep);font-weight:600}.article-body td,.article-body th{padding:16px;border-bottom:1px solid var(--line);vertical-align:top}.article-body tr:last-child td{border-bottom:0}.article-toc{position:sticky;top:28px;align-self:start;font-size:13px}.article-toc>p{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--deep);font-weight:600;margin-bottom:18px}.toc-links{list-style:none;border-left:1px solid var(--line);margin:0;padding:0}.toc-links li{margin:0}.toc-links a{display:block;text-decoration:none;color:var(--muted);line-height:1.5;padding:8px 0 8px 18px;border-left:2px solid transparent;margin-left:-1px}.toc-links a:hover,.toc-links a[aria-current=true]{color:var(--blue);border-left-color:var(--blue)}.mobile-toc{display:none}.article-cta{background:var(--cool);border:1px solid #dce5f5;padding:30px;margin-top:30px;border-radius:4px}.article-cta .button{font-size:15px}.related{padding:64px 0;background:var(--surface)}.related h2{font-size:30px}.blog-card{display:block;text-decoration:none;color:var(--ink);padding:28px;background:white;border:1px solid var(--line);border-radius:4px;transition:border-color .18s}.blog-card:hover{color:var(--ink);border-color:var(--blue)}.blog-card .card-category{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);margin-bottom:26px;display:block}.blog-card h3{font-size:23px}.blog-card p{font-size:16px}.text-link{font-size:14px;display:flex;align-items:center;gap:12px;color:var(--deep);font-weight:500;margin-top:24px}.text-link .icon{width:18px}.blog-feature{padding:52px;background:var(--cool);border:1px solid #dce5f5;border-radius:6px;display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center}.blog-feature h2{font-size:40px}.guide-art{height:270px;display:flex;align-items:center;justify-content:center}.guide-sheet{background:white;box-shadow:12px 12px 0 #e7effd;width:210px;padding:30px;border:1px solid #cddbf5;transform:rotate(4deg);color:var(--deep)}.guide-sheet .icon{width:36px;height:36px;margin-bottom:34px}.guide-sheet b{font:700 26px Manrope;display:block;margin-bottom:12px}.guide-sheet span{display:block;height:1px;background:#ccd8ee;margin:12px 0}.blog-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:32px}.review-hero{padding:70px 0 50px}.review-hero h1{max-width:800px}.review-notice{border-left:2px solid var(--blue);background:var(--cool);padding:18px 24px;font-size:15px}.review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:32px 0 60px}.review-card{border:1px solid var(--line);padding:28px;text-decoration:none;color:var(--ink);border-radius:4px;display:flex;flex-direction:column}.review-card:hover{border-color:var(--blue);color:var(--ink)}.review-card p{font-size:15px}.review-card .text-link{margin-top:auto}.review-card .section-number{margin-bottom:30px}.review-card h2{font-size:25px}.no-js-note{display:none}
@media(min-width:1600px){.hero{padding-top:88px}.hero-grid{min-height:500px}}
@media(max-width:1150px) and (min-width:960px){.container{width:calc(100% - 96px)}.site-nav{gap:20px}.header-inner{gap:24px}.hero-copy{padding-right:12px}h1{font-size:44px}.process-layout,.faq-layout{gap:44px}.authority-box{padding:36px;gap:34px}.authority-person{padding-left:30px}.closing-box{padding:42px;gap:28px}.closing-box .button{font-size:14px}}
@media(max-width:959px){body{font-size:16px}.container{width:calc(100% - 48px)}.site-header{height:auto;min-height:88px}.header-inner{min-height:88px;flex-wrap:wrap;gap:0;justify-content:space-between}.brand,.brand img{width:76px;height:76px}.header-contact{margin-left:auto;margin-right:24px;font-size:13px}.menu-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid var(--line);background:white;min-height:44px;padding:8px 12px;border-radius:4px;color:var(--ink);font-size:12px}.site-nav{width:100%;order:4;margin:0;padding:8px 0 16px;justify-content:space-between;gap:12px}.site-nav a{font-size:13px}.js .site-nav{display:none}.js .site-nav.is-open{display:flex}.hero{padding:42px 0 20px}.hero-grid{grid-template-columns:1fr;min-height:0}.hero-copy{padding:0}.hero-copy>p{font-size:16px;max-width:640px}h1{font-size:34px;max-width:630px}h2{font-size:28px}h3{font-size:22px}.hero-visual{min-height:260px;max-width:500px;width:100%;margin:12px auto 0}.air-illustration{width:360px;max-width:100%}.visual-caption{bottom:10px;font-size:9px}.eyebrow{font-size:10px;margin-bottom:22px}.hero-bottom{margin-top:14px;padding-top:20px;font-size:10px}.hero-copy .coverage{font-size:12px;max-width:390px}.section{padding:64px 0}.section-heading{grid-template-columns:1fr;gap:20px;margin-bottom:28px}.section-heading h2{max-width:650px}.section-heading p{max-width:650px}.cards,.cards.four{grid-template-columns:1fr;gap:20px}.service-card{padding-top:23px}.card-icon{margin-bottom:15px;height:32px}.service-card h3{max-width:none;font-size:22px}.service-card p{max-width:640px}.authority-box{padding:30px;grid-template-columns:1fr;gap:36px}.authority-person{border-left:0;border-top:1px solid #cdd3da;padding:30px 0 0}.authority-person .icon{margin-bottom:20px;width:30px;height:30px}.authority-person h3{font-size:26px}.authority-person .person-note{max-width:480px}.authority-person .role{margin-bottom:15px}.process-layout,.faq-layout{grid-template-columns:1fr;gap:28px}.process-intro h2{max-width:620px}.step{grid-template-columns:30px 1fr;gap:14px}.step h3{font-size:21px}.step p{font-size:16px}.closing{padding-top:20px;padding-bottom:64px}.closing-box{grid-template-columns:1fr;gap:26px;padding:30px}.closing-box h2{font-size:28px}.deliverables{grid-template-columns:1fr;gap:0}.deliverable{border-top:0;border-left:1px solid #2563eb55;padding:0 0 30px 28px}.deliverable:last-child{padding-bottom:0}.deliverable:before{left:-4px;top:4px}.deliverable .section-number{margin-bottom:12px}.deliverable h3{margin-bottom:12px;font-size:22px}.deliverable p{font-size:16px;margin-bottom:0}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-brand{grid-column:1/-1}.footer-bottom{flex-wrap:wrap}.airflow-line:nth-child(3){display:none}.faq-list summary{font-size:16px}.editorial-hero{padding:42px 0 34px}.editorial-lines{width:120px;height:65px}.article-layout{grid-template-columns:1fr;gap:24px;padding-block:32px 64px}.article-toc{display:none}.mobile-toc{display:block;border:1px solid var(--line);padding:18px 20px;border-radius:4px}.mobile-toc summary{font-weight:500;color:var(--deep);cursor:pointer;min-height:26px}.mobile-toc .toc-links{margin-top:16px;font-size:14px}.article-body{max-width:none}.article-body p,.article-body li{font-size:17px}.article-body>p:first-child{font-size:18px}.article-body h2{font-size:26px;margin-top:38px}.article-body h3{font-size:21px}.article-cta{padding:22px}.blog-feature{grid-template-columns:1fr;padding:30px;gap:20px}.blog-feature h2{font-size:32px}.guide-art{height:210px}.guide-sheet{width:180px;padding:22px}.guide-sheet .icon{margin-bottom:22px}.blog-grid{grid-template-columns:1fr}.review-grid{grid-template-columns:1fr}.review-hero{padding:42px 0 30px}.related .cards{grid-template-columns:1fr}}
@media(max-width:420px){.container{width:calc(100% - 48px)}.header-contact{margin-right:12px;font-size:12px;gap:6px}.header-contact .icon{width:16px}.menu-button{font-size:0;padding:10px;gap:0}.menu-button .icon{width:22px}.hero-copy .button{width:100%;justify-content:space-between;font-size:15px;gap:10px;padding:15px 17px}.button{font-size:15px;padding:14px 17px;gap:12px}.hero-bottom{align-items:flex-start;gap:24px}.hero-bottom>span{max-width:160px}.authority-box,.closing-box{padding:25px}.footer-grid{grid-template-columns:1fr}.footer-brand{gap:12px}.section-heading h2{font-size:28px}.article-body td,.article-body th{padding:12px}.review-card{padding:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.button:hover .icon{transform:none}}
@media print{.site-header,.site-footer,.airflow-layer,.fallback-flow,.article-toc,.mobile-toc,.hero-visual,.related,.review-notice{display:none}.container{width:100%}.section,.hero{padding:24px 0}.hero-grid,.article-layout,.authority-box,.faq-layout,.closing-box{display:block}.article-layout{padding:0}.article-body{max-width:none}.faq-list details .faq-answer{display:block}.button{background:white;color:var(--deep);border:1px solid var(--deep)}body{font-size:12pt}.article-body p{font-size:12pt}}
/* Grid tracks must shrink to the viewport, including SVG intrinsic widths. */
.hero-grid>*{min-width:0}.support-note p:last-child{margin-bottom:0}
@media(max-width:959px){.hero-grid{grid-template-columns:minmax(0,1fr)}}

@media(max-width:959px){html:not(.js) .menu-button{display:none}}