:root{--paper:#f5f3ee;--bright:#fcfaf6;--ink:#263946;--pine:#315462;--deep:#203d49;--glass:#dbe4e2;--clay:#b56f55;--clay-dark:#95523f;--line:rgba(38,57,70,.14);--muted:#596a71;--mono:"IBM Plex Mono",monospace;--sans:"Instrument Sans",sans-serif;--serif:"Instrument Serif",Georgia,serif;--container:1180px;--shadow:0 24px 70px rgba(31,55,66,.11)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:linear-gradient(rgba(23,52,44,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(23,52,44,.025) 1px,transparent 1px),var(--paper);background-size:32px 32px;font:17px/1.65 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.18em}a:hover{color:var(--clay-dark)}button{font:inherit}:focus-visible{outline:3px solid #e49b60;outline-offset:4px}.grid-container{width:min(calc(100% - 40px),var(--container));margin-inline:auto}.screen-reader-text{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.screen-reader-text:focus{position:fixed;z-index:99;top:12px;left:12px;width:auto;height:auto;margin:0;padding:12px;clip:auto;color:#fff;background:var(--deep)}
.identity-notice{color:#f8f4e8;background:var(--deep);font:500 11px/1.4 var(--mono);letter-spacing:.05em;text-transform:uppercase}.identity-notice__inner{min-height:35px;display:flex;align-items:center;justify-content:space-between;gap:20px}.identity-notice a{color:#fff}.site-header{position:relative;z-index:20;background:rgba(243,239,228,.96);border-bottom:1px solid var(--line)}.inside-header{min-height:112px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:32px}.site-branding{display:inline-flex;align-items:center;gap:14px;width:fit-content;text-decoration:none}.site-branding:hover{color:var(--ink)}.brand-mark{width:43px;height:48px;display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:5px;border:1px solid currentColor;clip-path:polygon(50% 0,100% 23%,100% 100%,0 100%,0 23%)}.brand-mark i{background:currentColor}.brand-mark i:first-child{height:58%;align-self:end}.brand-mark i:nth-child(2){height:100%}.brand-mark i:last-child{height:77%;align-self:end}.brand-copy{display:grid;line-height:1}.brand-kicker{font:600 10px/1.2 var(--mono);letter-spacing:.18em;text-transform:uppercase}.brand-name{font:600 27px/.96 var(--serif)}.menu-toggle{display:none;color:var(--ink);background:transparent;border:0}.main-navigation{border-top:1px solid var(--line)}.inside-navigation{display:flex;justify-content:space-between}.main-nav{display:flex;gap:33px;list-style:none;padding:0;margin:0}.main-nav a,.nav-tool-link{display:flex;align-items:center;min-height:48px;font:600 11px/1 var(--mono);letter-spacing:.06em;text-decoration:none;text-transform:uppercase}.main-nav li{position:relative}.main-nav .current-menu-item:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:3px;background:var(--clay)}.nav-tool-link{color:var(--clay-dark)}
.eyebrow,.story-label,.module-code,.visual-code,.box-label{margin:0 0 15px;font:600 11px/1.35 var(--mono);letter-spacing:.1em;text-transform:uppercase}.eyebrow span{color:var(--clay-dark);margin-right:12px}.home-intro{min-height:660px;display:grid;grid-template-columns:.95fr 1.05fr;align-items:center;gap:8%;padding-block:82px 96px}.home-intro h1,.entry-title{max-width:780px;margin:0;font:500 clamp(54px,6.3vw,91px)/.91 var(--serif);letter-spacing:-.045em}.home-intro h1 em{color:var(--clay);font-weight:500}.home-intro__dek{max-width:590px;margin:29px 0;color:#43564e;font-size:19px}.text-actions{display:flex;flex-wrap:wrap;gap:25px}.text-link{font:600 12px/1.4 var(--mono)}
.airflow-plate{position:relative;min-height:475px;overflow:hidden;color:#fff;background:var(--pine);box-shadow:0 22px 60px rgba(8,42,34,.13)}.airflow-plate:before{content:"";position:absolute;inset:0;opacity:.18;background:repeating-linear-gradient(90deg,transparent 0 54px,#dce8dc 55px 56px),repeating-linear-gradient(0deg,transparent 0 54px,#dce8dc 55px 56px)}.plate-meta,.plate-caption{position:absolute;z-index:2;left:28px;right:28px;display:flex;justify-content:space-between;font:500 10px/1.4 var(--mono);text-transform:uppercase}.plate-meta{top:24px}.plate-caption{bottom:18px;margin:0;padding-top:13px;border-top:1px solid #ffffff52;text-transform:none}.greenhouse-study{position:absolute;inset:18% 8% 15%}.greenhouse-frame{position:absolute;inset:22% 8% 10%;border:2px solid #ffffffb3;border-top:0}.greenhouse-roof{position:absolute;left:9%;top:7%;width:82%;height:38%;border:2px solid #ffffffb3;clip-path:polygon(50% 0,100% 100%,0 100%)}.intake-louver{position:absolute;left:4%;bottom:26%;display:grid;gap:5px}.intake-louver i{width:38px;height:3px;background:var(--glass);transform:skewY(-18deg)}.exhaust-fan{position:absolute;right:3%;top:37%;width:67px;aspect-ratio:1;border:2px solid var(--glass);border-radius:50%}.exhaust-fan:before,.exhaust-fan:after,.exhaust-fan i{content:"";position:absolute;inset:45% 10%;background:var(--glass)}.exhaust-fan:after{transform:rotate(60deg)}.exhaust-fan i{transform:rotate(120deg)}.air-line{position:absolute;left:15%;right:20%;height:1px;background:#e49b60;animation:breathe 3.2s ease-in-out infinite}.air-line:after{content:"";position:absolute;right:-2px;top:-3px;width:7px;height:7px;border-top:1px solid #e49b60;border-right:1px solid #e49b60;transform:rotate(45deg)}.air-line--one{top:43%;transform:rotate(-4deg)}.air-line--two{top:57%;animation-delay:.5s}.air-line--three{top:70%;transform:rotate(4deg);animation-delay:1s}.study-label{position:absolute;font:500 9px/1 var(--mono);text-transform:uppercase}.study-label--in{left:2%;bottom:16%}.study-label--out{right:1%;top:26%}@keyframes breathe{50%{opacity:1}0%,100%{opacity:.4}}
.problem-index{padding:82px 0;color:#fff;background:var(--deep)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:35px;margin-bottom:35px}.section-heading h2{max-width:760px;margin:0;font:500 clamp(36px,4vw,58px)/1 var(--serif);letter-spacing:-.03em}.section-heading--inverse .eyebrow{color:#b9cdbf}.problem-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #ffffff40}.problem-card{min-height:220px;display:flex;flex-direction:column;padding:24px 25px;color:#fff;border-right:1px solid #ffffff40;text-decoration:none;transition:.25s}.problem-card:first-child{border-left:1px solid #ffffff40}.problem-card:hover{color:var(--deep);background:#d7dfd1}.problem-card__number,.problem-card__meta{font:500 10px/1.35 var(--mono);text-transform:uppercase}.problem-card__title{max-width:190px;margin-block:auto;font:500 25px/1.05 var(--serif)}.problem-card__arrow{font-size:25px}
.editorial-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(260px,.72fr);gap:70px;padding-block:95px}.section-heading--line{padding-bottom:22px;border-bottom:1px solid var(--line)}.lead-story{display:grid;grid-template-columns:.95fr 1.05fr;gap:34px;padding-bottom:45px;border-bottom:1px solid var(--line)}.story-visual{position:relative;min-height:315px;overflow:hidden;background:linear-gradient(135deg,#bbceb9,#799c85);text-decoration:none}.story-visual:before{content:"";position:absolute;inset:16% 10%;border:1px solid #082a2294;clip-path:polygon(12% 100%,12% 37%,50% 0,88% 37%,88% 100%)}.visual-fan{position:absolute;right:19%;top:37%;width:65px;aspect-ratio:1;border:1px solid var(--deep);border-radius:50%}.visual-air{position:absolute;left:12%;width:55%;border-top:2px solid var(--clay)}.visual-air:after{content:"";position:absolute;right:0;top:-5px;width:8px;height:8px;border-top:2px solid var(--clay);border-right:2px solid var(--clay);transform:rotate(45deg)}.visual-air--a{top:44%}.visual-air--b{top:56%;width:62%}.visual-air--c{top:68%;width:49%}.visual-code{position:absolute;left:18px;top:18px}.lead-story__copy h3{margin:0 0 18px;font:500 37px/1.02 var(--serif)}.lead-story__copy h3 a,.story-row h3 a{text-decoration:none}.lead-story__copy>p:not(.story-label),.story-row__summary{color:var(--muted);font-size:13px}.story-points{padding:0;list-style:none;border-top:1px solid var(--line)}.story-points li{padding:9px 0;border-bottom:1px solid var(--line);font-size:13px}.story-read{font:600 11px/1 var(--mono);text-transform:uppercase}.story-row{display:grid;grid-template-columns:45px 1.2fr 1fr 40px;align-items:center;gap:20px;min-height:142px;border-bottom:1px solid var(--line)}.story-row__index{font:500 11px/1 var(--mono)}.story-row h3{margin:0;font:500 25px/1.1 var(--serif)}.circle-link{width:38px;aspect-ratio:1;display:grid;place-items:center;border:1px solid var(--ink);border-radius:50%;text-decoration:none}.editorial-sidebar{display:grid;align-content:start;gap:25px}.sidebar-module{padding:27px;border:1px solid var(--line)}.sidebar-module--start{color:#fff;background:var(--pine);border-color:var(--pine)}.sidebar-module h2{margin:0 0 20px;font:500 28px/1.05 var(--serif)}.sidebar-module p:not(.module-code){color:var(--muted);font-size:14px}.sidebar-module--start .module-code{color:#b9cdbf}.start-list{padding:0;margin:0;list-style:none;counter-reset:start}.start-list li{counter-increment:start;border-top:1px solid #ffffff3b}.start-list a{display:grid;grid-template-columns:1fr auto;gap:12px;padding:15px 0;color:#fff;font-size:13px;text-decoration:none}.start-list a:before{content:"0" counter(start);color:#a8bcae;font:500 9px/1 var(--mono);grid-column:1/-1}.start-list b{font:500 9px/1.4 var(--mono);color:#b9cdbf}
.tool-band{padding:80px 0;color:#fff;background:var(--clay-dark)}.tool-band__inner{display:grid;grid-template-columns:1fr 1fr;gap:9%;align-items:center}.tool-band h2{margin:0 0 23px;font:500 clamp(39px,4.3vw,61px)/.98 var(--serif)}.tool-band__copy>p:last-child{color:#f1d9cf}.mini-calculator{padding:30px;color:var(--ink);background:var(--bright);box-shadow:14px 14px 0 #3b19114d}.calculator-fields label{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px solid var(--line);font:500 12px/1 var(--mono)}.calculator-fields label span{min-width:100px;display:flex;justify-content:space-between}.calculator-result{margin:25px 0}.calculator-result>span{font:600 10px/1 var(--mono);text-transform:uppercase}.calculator-result strong{display:block;font:500 58px/1 var(--serif)}.calculator-result small{font:500 18px/1 var(--mono)}.calculator-result p{color:var(--muted);font-size:13px}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 20px;font:600 11px/1 var(--mono);text-decoration:none;text-transform:uppercase;border:1px solid currentColor}.button--light{color:#fff;background:var(--pine)}.site-footer{color:#e7e4d9;background:var(--deep)}.footer-main{display:grid;grid-template-columns:1fr 1fr;gap:80px;padding-block:70px}.site-branding--footer{color:#fff}.footer-brand p{color:#aebcb3;font-size:13px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:40px}.footer-links div{display:grid;align-content:start;gap:8px}.footer-links h2{margin:0 0 10px;color:#91ab99;font:600 10px/1 var(--mono);text-transform:uppercase}.footer-links a{width:fit-content;font-size:13px;text-decoration:none}.footer-bottom{min-height:52px;display:flex;align-items:center;justify-content:space-between;color:#91a198;border-top:1px solid #ffffff29;font:500 9px/1 var(--mono);text-transform:uppercase}
.reading-progress{position:fixed;z-index:50;top:0;left:0;right:0;height:4px;pointer-events:none}.reading-progress__bar{width:100%;height:100%;background:var(--clay);transform:scaleX(0);transform-origin:left}.article-hero{padding:74px 0 62px;border-bottom:1px solid var(--line)}.article-hero__grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.5fr);gap:9%;align-items:end}.article-kicker{color:var(--clay-dark);font:600 11px/1.4 var(--mono);text-transform:uppercase}.article-shell{display:grid;grid-template-columns:210px minmax(0,720px) 210px;justify-content:space-between;gap:42px;padding-block:70px 110px}.article-toc{position:sticky;top:24px;align-self:start}.article-toc__label{padding-bottom:12px;border-bottom:1px solid;font:600 10px/1 var(--mono);text-transform:uppercase}.article-toc ol{padding:0;list-style:none;counter-reset:toc}.article-toc li{counter-increment:toc}.article-toc a{display:grid;grid-template-columns:25px 1fr;padding:8px 0;color:var(--muted);font-size:12px;line-height:1.35;text-decoration:none}.article-toc a:before{content:"0" counter(toc);font:500 9px/1.5 var(--mono)}.article-toc a.is-active{color:var(--clay-dark);font-weight:600}.entry-content{min-width:0}.entry-content>p:first-child{margin-top:0;font-size:21px}.entry-content h2{scroll-margin-top:35px;margin:72px 0 20px;font:500 45px/1.02 var(--serif)}.entry-content h3{margin:38px 0 13px;font:600 26px/1.12 var(--serif)}.entry-content p,.entry-content li{color:#334b41}.entry-content a{color:var(--clay-dark)}.note-box,.warning-box{margin:30px 0;padding:24px;border:1px solid var(--line);background:var(--bright)}.note-box{background:#dfe7da}.warning-box{background:#f0d9cc;border-color:#c8876f}.formula-plate{margin:35px 0;padding:30px;color:#fff;background:var(--pine)}.formula-plate code{display:block;color:#f5c0a6;font:500 22px/1.4 var(--mono);white-space:normal}.formula-plate p{color:#c5d4ca;font-size:13px}.table-scroll{max-width:100%;overflow-x:auto;margin:30px 0;border:1px solid var(--line)}.entry-content table{width:100%;min-width:610px;border-collapse:collapse;background:var(--bright);font-size:14px}.entry-content th,.entry-content td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line)}.entry-content th{color:#fff;background:var(--pine);font:600 10px/1.3 var(--mono);text-transform:uppercase}.reveal{animation:rise .7s both}.reveal--delay{animation-delay:.15s}@keyframes rise{from{opacity:0;transform:translateY(18px)}}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
.article-hero__grid>*,.inside-header>*{min-width:0}.entry-title{overflow-wrap:anywhere}
body{max-width:100%;overflow-x:hidden}

/* P0 reading-flow refinement */
.article-hero{padding-block:60px 54px}.article-hero__grid{grid-template-columns:minmax(0,1fr) 250px;align-items:end}.entry-title{max-width:16ch;font-size:clamp(58px,5.5vw,76px);line-height:.96}.quick-answer{grid-column:1/-1;max-width:820px;margin-top:36px;padding:25px 28px 26px;color:var(--ink);background:var(--bright);border:1px solid var(--line);border-left:4px solid var(--clay);box-shadow:0 18px 45px rgba(8,42,34,.08)}.quick-answer p{margin:0}.quick-answer .box-label{margin-bottom:10px;color:var(--clay-dark)}.article-shell{grid-template-columns:220px minmax(0,760px);justify-content:center;gap:64px}.article-toc-mobile{display:none}.entry-content>p:first-of-type{font-size:20px}.entry-content h2{font-size:42px}
.menu-toggle{min-width:48px;min-height:48px;align-items:center;justify-content:center}.menu-is-open{overflow:hidden}
@media(max-width:1100px){.main-nav{gap:22px}.main-nav a,.nav-tool-link{font-size:10px}.article-shell{gap:42px}}

/* P1 homepage hierarchy */
.home-intro{min-height:570px;padding-block:62px 70px;gap:6%}.home-intro h1{font-size:clamp(54px,5.7vw,80px)}.home-intro__dek{margin-block:24px}.button--primary{color:#fff;background:var(--pine);border-color:var(--pine)}.button--primary:hover{color:#fff;background:var(--deep)}.home-intro .text-actions{align-items:center}.home-trust{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);gap:0;padding:24px 0 0;margin:34px 0 0;list-style:none;border-top:1px solid var(--line)}.home-trust li{display:grid;gap:4px;padding-right:22px}.home-trust li+li{padding-left:22px;border-left:1px solid var(--line)}.home-trust strong{font:600 11px/1.35 var(--mono);letter-spacing:.02em}.home-trust span{color:var(--muted);font-size:12px}.airflow-plate{min-height:410px}.problem-index{padding-block:70px}

/* Premium soft visual system */
body{background:radial-gradient(circle at 86% 8%,rgba(205,222,207,.34),transparent 30%),radial-gradient(circle at 7% 48%,rgba(231,214,193,.24),transparent 28%),linear-gradient(rgba(24,59,52,.014) 1px,transparent 1px),linear-gradient(90deg,rgba(24,59,52,.014) 1px,transparent 1px),var(--paper);background-size:auto,auto,40px 40px,40px 40px,auto;letter-spacing:-.006em}.identity-notice{background:#123c34}.site-header{background:rgba(250,248,241,.88);border-color:rgba(24,59,52,.1);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}.brand-name{font-weight:400;letter-spacing:-.025em}.home-intro__dek{color:#586d64}.main-nav a,.nav-tool-link,.eyebrow,.story-label,.module-code,.visual-code,.box-label{letter-spacing:.075em}.home-intro h1,.entry-title,.section-heading h2,.lead-story__copy h3,.story-row h3,.sidebar-module h2,.tool-band h2,.entry-content h2,.entry-content h3{font-weight:400}.home-intro h1 em{color:var(--clay);font-weight:400}
.button{border-radius:6px;transition:transform .28s cubic-bezier(.2,.8,.2,1),box-shadow .28s,background .28s}.button:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(18,60,52,.14)}.text-link{transition:color .2s}.brand-mark{border-radius:4px}.airflow-plate{border-radius:20px;background:linear-gradient(145deg,#245b50,#123c34 62%,#0d3029);box-shadow:0 30px 75px rgba(18,60,52,.18)}.airflow-plate:after{content:"";position:absolute;inset:0;border:1px solid rgba(255,255,255,.13);border-radius:inherit;pointer-events:none}.problem-index{background:linear-gradient(145deg,#123c34,#0b3029)}.problem-card{transition:background .32s,color .32s,transform .32s}.problem-card:hover{transform:translateY(-4px);background:#e1e9df}.story-visual,.mini-calculator,.sidebar-module,.quick-answer,.note-box,.warning-box,.article-toc-mobile{border-radius:12px}.story-visual{box-shadow:0 18px 45px rgba(24,59,52,.1)}.sidebar-module{background:rgba(253,251,246,.65)}.sidebar-module--start{background:linear-gradient(145deg,#24584d,#153f36)}.tool-band{background:linear-gradient(135deg,#9f573f,#b96f54)}.mini-calculator{box-shadow:0 22px 55px rgba(72,34,22,.2)}.site-footer{background:linear-gradient(145deg,#0f382f,#092b25)}
.article-hero{background:linear-gradient(180deg,rgba(253,251,246,.4),rgba(246,243,235,.18))}.quick-answer{box-shadow:0 22px 55px rgba(24,59,52,.09);border-color:rgba(24,59,52,.12)}.formula-plate{background:linear-gradient(145deg,#24584d,#153f36);box-shadow:0 18px 45px rgba(24,59,52,.11)}.entry-content table{background:rgba(253,251,246,.82)}.entry-content th{background:#214d43}
.reveal{animation:soft-rise .9s cubic-bezier(.2,.75,.25,1) both}.reveal--delay{animation-delay:.14s}.home-trust li{animation:none}.air-line{animation:air-drift 4.8s ease-in-out infinite}.air-line--two{animation-delay:.7s}.air-line--three{animation-delay:1.4s}.exhaust-fan{animation:fan-breathe 5s ease-in-out infinite}@keyframes soft-rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}@keyframes air-drift{0%,100%{opacity:.35;translate:-8px 0}50%{opacity:.92;translate:7px 0}}@keyframes fan-breathe{0%,100%{filter:drop-shadow(0 0 0 rgba(207,226,216,0))}50%{filter:drop-shadow(0 0 9px rgba(207,226,216,.35))}}

.home-intro h1 .headline-line{display:block;white-space:nowrap}

.home-intro__copy.reveal{animation:none}

/* Mineral slate palette: distinct from forest-green benchmark sites */
body{background:radial-gradient(circle at 86% 8%,rgba(210,222,224,.42),transparent 31%),radial-gradient(circle at 7% 48%,rgba(232,216,199,.25),transparent 28%),linear-gradient(rgba(38,57,70,.013) 1px,transparent 1px),linear-gradient(90deg,rgba(38,57,70,.013) 1px,transparent 1px),var(--paper);background-size:auto,auto,40px 40px,40px 40px,auto}.identity-notice{background:#203d49}.airflow-plate{background:linear-gradient(145deg,#426c78,#294f5c 60%,#203d49)}.problem-index{background:linear-gradient(145deg,#294f5c,#1d3944)}.sidebar-module--start,.formula-plate{background:linear-gradient(145deg,#426672,#294b57)}.site-footer{background:linear-gradient(145deg,#233f4a,#182f39)}.entry-content th{background:#315462}.button--primary,.button--light{background:#315462;border-color:#315462}.button--primary:hover{background:#203d49}.article-hero__grid{grid-template-columns:minmax(0,900px);justify-content:start}.quick-answer{max-width:820px;margin-top:34px}

/* Single-row sticky navigation */
.site-header{position:sticky;top:0;z-index:60;height:84px;background:rgba(250,248,243,.92);border-bottom:1px solid rgba(38,57,70,.1);box-shadow:0 8px 28px rgba(31,55,66,.055)}.inside-header{min-height:84px;grid-template-columns:auto 1fr}.main-navigation{position:absolute;inset:0;border:0;pointer-events:none}.inside-navigation{height:84px;align-items:center;padding-left:245px}.main-nav{margin-left:auto;gap:27px;pointer-events:auto}.main-nav a{min-height:84px;font:600 13px/1 var(--sans);letter-spacing:-.01em;text-transform:none;color:#314650}.main-nav a:hover{color:var(--clay-dark)}.main-nav .current-menu-item:after{left:0;right:0;bottom:17px;height:2px;border-radius:2px;background:var(--clay)}.nav-tool-link{min-height:40px;margin-left:24px;padding:0 15px;color:#fff;background:var(--pine);border:1px solid var(--pine);border-radius:7px;font:600 12px/1 var(--sans);letter-spacing:0;text-transform:none;pointer-events:auto;transition:transform .25s,background .25s,box-shadow .25s}.nav-tool-link:hover{color:#fff;background:var(--deep);transform:translateY(-1px);box-shadow:0 9px 22px rgba(31,55,66,.14)}.article-toc{top:108px}.entry-content h2,.entry-content h3,section[id]{scroll-margin-top:110px}
@media(max-width:1100px) and (min-width:981px){.inside-navigation{padding-left:215px}.main-nav{gap:18px}.main-nav a{font-size:12px}.nav-tool-link{margin-left:16px;padding-inline:12px}}

.nav-tool-link{font-size:0;gap:0}.nav-tool-link:after{content:"Fan sizing tool";font:600 12px/1 var(--sans)}

@media(max-width:980px){.inside-header{min-height:86px}.menu-toggle{grid-column:2;grid-row:1;display:flex;align-items:center;gap:10px;font:600 10px/1 var(--mono);text-transform:uppercase}.menu-toggle__lines,.menu-toggle__lines:before,.menu-toggle__lines:after{width:23px;height:1px;display:block;background:currentColor}.menu-toggle__lines{position:relative}.menu-toggle__lines:before,.menu-toggle__lines:after{content:"";position:absolute;left:0}.menu-toggle__lines:before{top:-6px}.menu-toggle__lines:after{top:6px}.main-navigation{display:none}.main-navigation.is-open{display:block}.inside-navigation,.main-nav{display:block}.main-nav li{border-bottom:1px solid var(--line)}.home-intro{min-height:auto;grid-template-columns:1fr;gap:55px}.problem-grid{grid-template-columns:1fr 1fr}.editorial-grid{grid-template-columns:1fr}.editorial-sidebar{grid-template-columns:1fr 1fr}.article-hero__grid{grid-template-columns:1fr}.article-shell{grid-template-columns:minmax(0,1fr) 190px}.article-toc{display:none}.entry-content{grid-column:1;grid-row:1}.article-hero{padding-block:50px 44px}.article-hero__grid{grid-template-columns:1fr}.entry-title{max-width:18ch;font-size:clamp(50px,8vw,66px)}.quick-answer{margin-top:28px}.article-shell{display:block;padding-block:42px 75px}.article-toc{display:none}.article-toc-mobile{display:block;margin:0 0 32px;border:1px solid var(--line);background:var(--bright)}.article-toc-mobile summary{min-height:54px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;cursor:pointer;font:600 11px/1 var(--mono);letter-spacing:.07em;text-transform:uppercase;list-style:none}.article-toc-mobile summary::-webkit-details-marker{display:none}.article-toc-mobile summary:after{content:"+";font-size:20px;font-weight:400}.article-toc-mobile[open] summary:after{content:"−"}.article-toc-mobile ol{margin:0;padding:8px 18px 18px 45px;border-top:1px solid var(--line)}.article-toc-mobile li{padding:5px 0}.article-toc-mobile a{font-size:13px;text-decoration:none}.main-navigation.is-open{position:absolute;left:0;right:0;top:100%;max-height:calc(100vh - 86px);overflow:auto;background:var(--bright);box-shadow:0 20px 35px rgba(8,42,34,.14)}.main-navigation.is-open .inside-navigation{padding-block:8px 20px}.main-navigation.is-open .main-nav a,.main-navigation.is-open .nav-tool-link{min-height:52px;font-size:12px}.main-navigation.is-open .nav-tool-link{margin-top:12px;padding-inline:16px;color:#fff;background:var(--pine)}.home-intro{padding-block:54px 60px}.home-trust{margin-top:30px}.airflow-plate{min-height:380px}.article-hero__grid{grid-template-columns:1fr}.quick-answer{margin-top:28px}.site-header{height:76px}.inside-header{min-height:76px}.main-navigation{position:absolute;inset:auto 0 auto 0;top:100%;height:auto}.main-navigation.is-open{top:100%;max-height:calc(100vh - 76px)}.inside-navigation{height:auto;padding-left:0}.main-nav{margin-left:0}.main-nav a{min-height:52px;font-size:14px}.main-nav .current-menu-item:after{display:none}.nav-tool-link{margin:12px 0 0;min-height:50px;border-radius:7px}.entry-content h2,.entry-content h3,section[id]{scroll-margin-top:92px}}
@media(max-width:680px){body{font-size:16px}.grid-container{width:min(calc(100% - 28px),var(--container))}.identity-notice a{display:none}.home-intro{padding-block:55px 65px}.home-intro h1,.entry-title{font-size:clamp(46px,15vw,67px)}.airflow-plate{min-height:330px}.problem-grid,.editorial-sidebar,.tool-band__inner,.footer-main{grid-template-columns:1fr}.problem-card{min-height:165px;border-left:1px solid #ffffff40}.section-heading{display:block}.lead-story{grid-template-columns:1fr}.story-row{grid-template-columns:32px 1fr 38px;padding:20px 0}.story-row__summary{display:none}.footer-bottom{align-items:flex-start;flex-direction:column;justify-content:center;gap:6px}.article-shell{display:block;padding-block:48px 70px}.entry-content>p:first-child{font-size:18px}.entry-content h2{font-size:38px}.entry-title{font-size:48px;overflow-wrap:break-word}.identity-notice__inner{min-height:44px}.inside-header{min-height:76px}.site-branding{gap:10px}.brand-mark{width:36px;height:40px}.brand-name{font-size:22px}.menu-toggle__label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.article-hero{padding-block:42px 36px}.entry-title{max-width:none;font-size:clamp(42px,12.5vw,50px);line-height:.98;letter-spacing:-.035em}.quick-answer{margin-top:24px;padding:21px 20px}.quick-answer p:last-child{font-size:15px;line-height:1.55}.entry-content h2{font-size:36px}.entry-content h3{font-size:24px}.article-shell{padding-top:60px}.home-intro{gap:42px;padding-block:48px 54px}.home-intro h1{font-size:clamp(46px,14vw,62px)}.home-intro__dek{font-size:17px}.home-intro .text-actions{align-items:flex-start;flex-direction:column;gap:18px}.home-trust{grid-template-columns:1fr;padding-top:8px;margin-top:26px}.home-trust li,.home-trust li+li{padding:14px 0;border-left:0;border-bottom:1px solid var(--line)}.airflow-plate{min-height:310px}.problem-index{padding-block:58px}.airflow-plate{border-radius:14px}.quick-answer,.note-box,.warning-box,.article-toc-mobile{border-radius:9px}.home-intro h1{font-size:clamp(44px,12vw,54px)}.home-intro h1 .headline-line{white-space:nowrap}}

/* WordPress integration */
body{margin:0}.site-content{display:block}.site-header .inside-header{padding:0}.main-navigation .inside-navigation{padding-top:0;padding-bottom:0}.main-navigation ul{margin:0}.inside-article{padding:0;background:transparent}.entry-content{margin:0}.entry-content>*:first-child:not(.article-toc-mobile){margin-top:0}.admin-bar .site-header{top:32px}.screen-reader-text:focus{clip:auto!important;width:auto!important;height:auto!important;left:12px;top:12px;padding:12px 16px;background:#fff;color:var(--ink);z-index:100000}.identity-notice{position:relative;z-index:41}.page .entry-header{display:none}.home .site-content{padding:0}.article-toc [data-toc-list]:empty,.article-toc-mobile [data-toc-list]:empty{display:none}
@media(max-width:782px){.admin-bar .site-header{top:46px}}

@media(min-width:981px){.site-header .inside-header{position:relative;z-index:2}.site-header .main-navigation{background:transparent}.nav-tool-link{font-size:12px;gap:6px}.nav-tool-link:after{content:none}}

/* Production homepage and navigation */
.site-header{position:sticky;top:0;background:rgba(245,243,238,.97);backdrop-filter:blur(14px)}
.site-header__inner{min-height:84px;display:flex;align-items:center;gap:44px}
.site-header__inner>.site-branding{flex:0 0 auto}
.site-header__inner .main-navigation{position:static;display:block;flex:1;border:0;background:transparent}
.site-header__inner .inside-navigation{display:flex;align-items:center;justify-content:flex-end;gap:38px}
.site-header__inner .main-nav{display:flex;align-items:center;justify-content:flex-end;gap:30px}
.site-header__inner .main-nav a{min-height:84px;padding:0 2px;border-bottom:2px solid transparent;font-size:12px}
.site-header__inner .main-nav a:hover,.site-header__inner .main-nav a:focus-visible{color:var(--clay-dark);border-bottom-color:var(--clay)}
.site-header__inner .nav-tool-link{min-height:46px;padding:0 18px;color:#fff;background:var(--pine);border-radius:8px;white-space:nowrap}
.site-header__inner .nav-tool-link:hover{color:#fff;background:var(--deep)}
.editorial-section{padding-block:82px 96px}
.editorial-section>.section-heading{margin-bottom:42px}
.editorial-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;align-items:start;gap:72px}
.editorial-layout--single{grid-template-columns:1fr}
.editorial-layout .editorial-sidebar{display:block;align-self:start}
.editorial-layout .sidebar-module{position:sticky;top:118px;width:100%;margin:0}
.story-visual--image{padding:0;background:var(--glass)}
.story-visual--image img{width:100%;height:100%;display:block;object-fit:cover}
.launch-status{padding-block:96px;background:var(--deep);color:#fff}
.launch-status__inner{max-width:820px;margin-inline:auto;text-align:center}
.launch-status h2{margin:0;font:500 clamp(48px,6vw,76px)/.95 var(--serif);letter-spacing:-.035em}
.launch-status p:last-child{max-width:680px;margin:25px auto 0;color:#dbe4e2;font-size:18px}
.tool-cta{min-height:210px;display:flex;flex-direction:column;align-items:flex-start;justify-content:space-between;padding:32px;background:var(--bright);border-radius:10px;box-shadow:var(--shadow)}
.footer-placeholder{display:block;color:#b8c8c4;font-size:14px}

@media(max-width:980px){
  .site-header__inner{min-height:76px;justify-content:space-between;gap:20px}
  .site-header__inner .menu-toggle{display:flex}
  .site-header__inner .main-navigation{display:none;position:absolute;left:0;right:0;top:100%;background:var(--bright);box-shadow:0 20px 35px rgba(8,42,34,.14)}
  .site-header__inner .main-navigation.is-open{display:block}
  .site-header__inner .inside-navigation{display:block;width:min(calc(100% - 40px),var(--container));margin-inline:auto;padding:8px 0 20px}
  .site-header__inner .main-nav{display:block}
  .site-header__inner .main-nav li{border-bottom:1px solid var(--line)}
  .site-header__inner .main-nav a{min-height:54px;border:0;font-size:14px}
  .site-header__inner .nav-tool-link{margin-top:12px;justify-content:center}
  .editorial-layout{grid-template-columns:1fr;gap:42px}
  .editorial-layout .editorial-sidebar{display:block}
  .editorial-layout .sidebar-module{position:static;max-width:none}
}

@media(max-width:680px){
  .identity-notice{font-size:9px;letter-spacing:.035em}
  .identity-notice__inner{min-height:38px}
  .site-header__inner{width:min(calc(100% - 28px),var(--container))}
  .site-header__inner .inside-navigation{width:min(calc(100% - 28px),var(--container))}
  .editorial-section{padding-block:58px 68px}
  .editorial-section>.section-heading{margin-bottom:28px}
  .editorial-layout{gap:30px}
  .lead-story__copy>p:not(.story-label),.story-row__summary,.footer-links a,.footer-placeholder{font-size:15px}
  .editorial-layout .sidebar-module{padding:26px 22px;border-radius:10px}
  .editorial-layout .sidebar-module h2{font-size:34px}
  .start-list a{font-size:15px}
  .launch-status{padding-block:70px}
  .launch-status h2{font-size:48px}
  .launch-status p:last-child{font-size:16px}
  .footer-main{gap:42px}
}