@font-face{font-family:Anton;src:url('assets/anton.ttf') format('truetype');font-display:swap}
@font-face{font-family:PlexMono;src:url('assets/plex-mono.ttf') format('truetype');font-display:swap}
@font-face{font-family:PlexSans;src:url('assets/plex-sans-semibold.ttf') format('truetype');font-display:swap;font-weight:600}
:root{--yellow:#FBCB14;--blue:#1967D2;--ink:#141414;--paper:#F4F4F1;--white:#fff;--line:#d2d1cb}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
button,a{touch-action:manipulation}
.topline{height:10px;background:var(--yellow)}
.skip-link{position:absolute;top:-80px;left:16px;z-index:50;background:var(--yellow);padding:12px 18px;font-weight:700}
.skip-link:focus{top:16px}
.eyebrow,.hero-meta,.signal-strip,.section-number,.toc,.product-tag,.image-corner,.image-caption,.site-footer{font-family:PlexMono,'Courier New',monospace;font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.eyebrow{font-size:11px;line-height:1.4}
.site-header{background:var(--white);border-bottom:2px solid var(--ink)}
.header-inner{max-width:1440px;margin:auto;padding:12px clamp(22px,4vw,60px);display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:80px}
.brand img{width:176px;height:auto}
.header-right{display:flex;align-items:center;gap:30px}
.header-right .eyebrow{color:var(--blue)}
.header-link{padding:11px 14px;border:2px solid var(--ink);font:700 11px PlexMono,'Courier New',monospace;letter-spacing:.03em;text-transform:uppercase;text-decoration:none;white-space:nowrap}
.header-link:hover,.header-link:focus-visible{background:var(--yellow)}
.hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);min-height:615px;max-width:1600px;margin:auto;border-left:2px solid var(--ink);border-right:2px solid var(--ink);border-bottom:2px solid var(--ink)}
.hero-copy{position:relative;overflow:hidden;padding:clamp(40px,5.2vw,84px) clamp(28px,5vw,76px) 42px;background:var(--paper);display:flex;flex-direction:column;align-items:flex-start;isolation:isolate}
.hero-orbit{position:absolute;z-index:-1;width:540px;height:540px;border-radius:50%;background:var(--yellow);top:-275px;right:-185px}
.hero-kicker{margin:0 0 26px;color:var(--blue)}
h1,h2,h3,p{margin-top:0}
h1,h2{font-family:Anton,Impact,'Arial Narrow',sans-serif;font-weight:400;text-transform:uppercase}
h1{font-size:clamp(55px,5.5vw,95px);line-height:.97;letter-spacing:.005em;max-width:880px;margin:0 0 34px}
h1 mark{color:var(--ink);background:var(--yellow);padding:0 .07em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.hero-deck{max-width:520px;margin:0 0 30px;font:600 clamp(17px,1.4vw,22px)/1.28 PlexSans,Arial,sans-serif}
.hero-meta{display:flex;gap:18px;flex-wrap:wrap;margin-top:auto;padding-top:26px;border-top:2px solid var(--ink);width:100%;font-size:10px}
.hero-meta span+span:before{content:'/';padding-right:18px;color:var(--blue)}
.hero-image{position:relative;min-height:615px;background:#272726;overflow:hidden}
.hero-image:after{content:'';position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.5),transparent 35%),linear-gradient(90deg,rgba(0,0,0,.15),transparent 30%);pointer-events:none}
.hero-image img{width:100%;height:100%;object-fit:cover;object-position:center 46%;filter:grayscale(32%) contrast(1.08)}
.image-corner{position:absolute;z-index:1;top:28px;right:26px;background:var(--ink);color:var(--yellow);padding:12px 13px;border:2px solid var(--yellow);font-size:10px;line-height:1.35;transform:rotate(3deg)}
.image-caption{position:absolute;z-index:1;bottom:24px;left:28px;color:var(--white);font-size:9px}
.signal-strip{background:var(--blue);color:var(--white);border-bottom:2px solid var(--ink)}
.signal-strip>div{max-width:1440px;margin:auto;padding:17px clamp(22px,4vw,60px);display:flex;align-items:center;justify-content:space-between;gap:28px;font-size:10px}
.signal-strip strong{font:400 clamp(15px,1.8vw,24px)/1 Anton,Impact,sans-serif;letter-spacing:.02em}
.article-shell{max-width:1440px;margin:auto;padding:0 clamp(22px,4vw,60px);display:grid;grid-template-columns:238px minmax(0,760px);gap:clamp(42px,6.4vw,112px);justify-content:center;background:var(--white)}
.toc{font-size:10px;line-height:1.5;border-right:1px solid var(--line);padding-right:26px}
.toc-inner{position:sticky;top:24px;padding:69px 0 48px}
.toc .eyebrow{color:var(--blue);margin-bottom:18px}
.toc ol{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.toc li{border-bottom:1px solid var(--line)}
.toc a{display:flex;align-items:center;gap:11px;padding:13px 0;text-decoration:none}
.toc a:hover,.toc a:focus-visible{color:var(--blue)}
.toc li span{color:var(--blue)}
.toc-footer{margin-top:27px;line-height:1.8;color:#666}
.article-body{padding:70px 0 110px;min-width:0}
.article-body>p,.intro p,.product-zone>p{font-size:18px;line-height:1.63;margin:0 0 20px;letter-spacing:-.004em}
.article-body a{text-decoration-thickness:1px;text-underline-offset:3px}
.article-body a:hover{color:var(--blue)}
.intro{border-left:8px solid var(--yellow);padding:0 0 3px 25px;margin:0 0 55px}
.intro .eyebrow{display:block;color:var(--blue);margin:0 0 14px}
.intro p:first-of-type{font:600 23px/1.43 PlexSans,Arial,sans-serif}
.intro p:last-child{font-weight:700}
.section-heading{margin:65px 0 22px;padding-top:18px;border-top:3px solid var(--ink)}
.section-number{display:block;color:var(--blue);font-size:11px;margin:0 0 13px}
.section-heading h2,.references h2{font-size:clamp(36px,3.7vw,57px);line-height:1.04;letter-spacing:.002em;margin:0;scroll-margin-top:28px}
.pollutant-list{border-top:2px solid var(--ink);margin:12px 0 30px}
.pollutant-row{display:grid;grid-template-columns:42px 180px 1fr;align-items:start;gap:15px;border-bottom:1px solid var(--ink);padding:17px 0;font-size:15px;line-height:1.48}
.pollutant-index{font:700 12px PlexMono,'Courier New',monospace;color:var(--blue);padding-top:3px}
.pollutant-row strong{font-family:PlexSans,Arial,sans-serif;font-weight:600;text-transform:uppercase;font-size:14px;line-height:1.3}
.signal-quote{position:relative;margin:36px 0 44px;padding:30px 36px 27px;background:var(--yellow);border:2px solid var(--ink);box-shadow:8px 8px 0 var(--blue)}
.signal-quote .quote-mark{font:400 68px/.7 Anton,Impact,sans-serif;display:block}
.signal-quote p{font:400 clamp(24px,3vw,38px)/1.08 Anton,Impact,sans-serif;text-transform:uppercase;margin:15px 0 0}
.product-zone{margin:64px -30px 0;padding:1px 30px 37px;background:var(--paper);border-top:8px solid var(--yellow);border-bottom:2px solid var(--ink)}
.product-zone .section-heading{margin-top:25px}
.product-feature{margin:33px 0;padding:0;background:var(--yellow);display:grid;grid-template-columns:1.2fr .8fr;border:2px solid var(--ink)}
.product-visual{position:relative;min-height:350px;overflow:hidden;display:grid;place-items:center;background:radial-gradient(circle at 66% 43%,#fff6c8 0,#fbd329 52%,var(--yellow) 100%)}
.product-visual:before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent 49.8%,rgba(20,20,20,.11) 50%,transparent 50.2%),linear-gradient(transparent 49.8%,rgba(20,20,20,.11) 50%,transparent 50.2%);background-size:48px 48px}
.product-visual img{position:relative;z-index:1;width:min(80%,410px);filter:drop-shadow(12px 16px 8px rgba(0,0,0,.22))}
.product-tag{position:absolute;top:15px;left:16px;background:var(--ink);color:var(--yellow);font-size:10px;padding:9px 10px;z-index:2}
.product-feature figcaption{padding:38px 28px;background:var(--ink);color:var(--white);display:flex;flex-direction:column;justify-content:flex-end;gap:14px}
.product-feature figcaption .eyebrow{color:var(--yellow)}
.product-feature figcaption strong,.gas-panel strong{font:400 54px/1 Anton,Impact,sans-serif;text-transform:uppercase}
.product-feature figcaption span:last-child{font-size:16px;line-height:1.4}
.gas-panel{display:grid;grid-template-columns:1fr 170px;gap:20px;background:var(--blue);color:var(--white);border:2px solid var(--ink);margin:24px 0 32px;min-height:188px}
.gas-panel>div{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;padding:23px;gap:9px}
.gas-panel .eyebrow{color:var(--yellow)}
.gas-panel strong{font-size:37px}
.gas-panel span:last-child{font-size:14px;line-height:1.35}
.gas-panel img{width:100%;height:100%;object-fit:cover;background:var(--white)}
.closing-statement{font:400 clamp(24px,3vw,36px)/1.1 Anton,Impact,sans-serif;text-transform:uppercase;background:var(--white);border-left:8px solid var(--blue);padding:18px 22px;margin:28px 0 !important}
.article-cta{display:flex;align-items:center;justify-content:space-between;gap:28px;background:var(--ink);color:var(--white);padding:26px 30px;margin-top:34px}
.article-cta .eyebrow{color:var(--yellow)}
.article-cta p{font:600 17px/1.4 PlexSans,Arial,sans-serif;margin:9px 0 0;max-width:450px}
.article-cta>a{flex:0 0 auto;text-decoration:none;background:var(--yellow);color:var(--ink);padding:15px 19px;border:2px solid var(--yellow);font:700 11px/1.3 PlexMono,'Courier New',monospace;text-transform:uppercase}
.article-cta>a:hover{background:var(--white);color:var(--ink)}
.references{padding-top:50px}
.references>.eyebrow{color:var(--blue);margin:0 0 13px}
.references h2{border-top:3px solid var(--ink);padding-top:17px}
.references-intro{font-size:16px !important;margin:17px 0 23px !important}
.reference-list{margin:0;padding:0;list-style:none;counter-reset:reference}
.reference-list li{counter-increment:reference;position:relative;padding:15px 0 15px 42px;border-bottom:1px solid var(--line);font-size:14px;line-height:1.45}
.reference-list li:before{content:counter(reference,decimal-leading-zero);position:absolute;left:0;top:17px;color:var(--blue);font:700 11px PlexMono,'Courier New',monospace}
.end-band{background:var(--yellow);border-top:2px solid var(--ink);border-bottom:2px solid var(--ink)}
.end-band>div{max-width:1440px;margin:auto;padding:65px clamp(22px,4vw,60px);display:grid;grid-template-columns:1fr auto;gap:10px 32px;align-items:end}
.end-band .eyebrow{grid-column:1/-1;color:var(--blue)}
.end-band h2{font-size:clamp(42px,4.8vw,72px);line-height:1;margin:0;max-width:720px}
.end-band a{display:inline-block;padding:15px 18px;border:2px solid var(--ink);box-shadow:5px 5px 0 var(--blue);font:700 11px PlexMono,'Courier New',monospace;text-transform:uppercase;text-decoration:none;white-space:nowrap}
.end-band a:hover{background:var(--white)}
.site-footer{max-width:1440px;margin:auto;padding:30px clamp(22px,4vw,60px);display:flex;justify-content:space-between;align-items:center;gap:30px;font-size:10px}
.site-footer>div{display:flex;align-items:center;gap:20px}
.site-footer img{width:105px}
.site-footer a{text-decoration:none;white-space:nowrap}
.site-footer a:hover{color:var(--blue)}
@media(max-width:1100px){.hero{min-height:560px}.hero-image{min-height:560px}.article-shell{grid-template-columns:190px minmax(0,690px);gap:50px}.toc{padding-right:18px}.pollutant-row{grid-template-columns:32px 150px 1fr}}
@media(max-width:780px){.header-right .eyebrow{display:none}.hero{display:block;border-left:0;border-right:0}.hero-copy{min-height:520px;padding:40px 26px 24px}.hero-orbit{width:400px;height:400px;top:-210px;right:-155px}.hero-image{height:360px;min-height:0}.hero-image img{object-position:center 43%}.signal-strip>div{display:block}.signal-strip span{display:none}.article-shell{display:block;padding:0 24px}.toc{border-right:0;padding:0}.toc-inner{position:static;padding:28px 0 0}.toc ol{display:flex;flex-wrap:wrap;border-top:0;gap:6px}.toc li{border:0}.toc a{border:1px solid var(--line);padding:8px 10px;font-size:9px}.toc-footer{display:none}.article-body{padding-top:46px}.product-zone{margin-left:-24px;margin-right:-24px;padding-left:24px;padding-right:24px}.end-band>div{grid-template-columns:1fr}.end-band a{justify-self:start;margin-top:14px}}
@media(max-width:540px){.header-inner{min-height:68px;padding:12px 19px}.brand img{width:135px}.header-link{font-size:9px;padding:8px}.hero-copy{min-height:520px;padding:36px 22px 24px}h1{font-size:clamp(50px,12vw,65px)}.hero-kicker{max-width:205px}.hero-deck{font-size:17px}.hero-meta{gap:9px;font-size:8px}.hero-meta span+span:before{padding-right:9px}.hero-image{height:300px}.article-shell{padding:0 20px}.article-body>p,.intro p,.product-zone>p{font-size:16px;line-height:1.6}.intro p:first-of-type{font-size:20px}.section-heading{margin-top:50px}.section-heading h2,.references h2{font-size:38px}.pollutant-row{grid-template-columns:28px 1fr;gap:7px 11px}.pollutant-row span:last-child{grid-column:2}.product-zone{margin-left:-20px;margin-right:-20px;padding-left:20px;padding-right:20px}.product-feature{display:block}.product-visual{min-height:280px}.product-feature figcaption{padding:22px;gap:9px}.product-feature figcaption strong{font-size:42px}.gas-panel{grid-template-columns:1fr 110px}.gas-panel>div{padding:15px}.gas-panel strong{font-size:32px}.gas-panel span:last-child{font-size:12px}.article-cta{display:block;padding:24px}.article-cta>a{display:inline-block;margin-top:20px}.end-band>div{padding-top:48px;padding-bottom:48px}.end-band h2{font-size:42px}.site-footer{display:block}.site-footer>div{align-items:flex-start;flex-direction:column;gap:12px}.site-footer a{display:inline-block;margin-top:20px}}
@media print{.site-header,.toc,.end-band,.site-footer,.signal-strip{display:none}.hero{min-height:0}.hero-copy{padding:30px}.hero-image{height:280px;min-height:0}.article-shell{display:block}.article-body{padding:25px 0}.product-zone,.signal-quote,.article-cta{-webkit-print-color-adjust:exact;print-color-adjust:exact}a{color:var(--ink);text-decoration:none}}