.engineering-gallery article figure{background:var(--pale);padding:20px}
.engineering-gallery article img{width:100%;height:260px;object-fit:contain}
.engineering-gallery article h3{margin-top:24px}
.engineering-gallery article p{color:var(--muted)}
.engineering-gallery figcaption{font-size:13px;line-height:1.5;margin-top:12px}
.engineering-gallery .engineering-evidence{margin-top:56px}
.engineering-gallery>figure img{width:100%;max-width:914px;height:auto}
.engineering-gallery{scroll-margin-top:110px}
.cfd-gallery figure{margin:0}
.cfd-gallery img{width:100%;height:auto}
#combustor-cfd{scroll-margin-top:110px}
:root{--navy:#254B7E;--navy-deep:#0E2340;--cyan:#3AB0DF;--cyan-web:#3DB1E9;--ink:#16263A;--muted:#5E6E7E;--pale:#EEF5FA;--pale-2:#F5F8FB;--line:#D3E1EC;--paper:#FFFFFF;--display:"Montserrat",sans-serif;--font:"Inter",sans-serif;--mono:"IBM Plex Sans Condensed",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);line-height:1.6;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}button{font:inherit;cursor:pointer}picture{display:block}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip-link{position:absolute;left:16px;top:-80px;z-index:100;background:var(--cyan);color:var(--navy-deep);padding:10px 14px;font-weight:600}.skip-link:focus{top:12px}
.shell{width:min(1240px,calc(100% - 48px));margin:auto}
.eyebrow{font:600 11px var(--display);letter-spacing:.16em;text-transform:uppercase;color:var(--navy)}
h1,h2,h3,p{margin-top:0}h1,h2{font-family:var(--display);font-weight:300;color:var(--navy);letter-spacing:-.035em}
h1 em,h2 em{font-style:normal;color:var(--cyan-web)}
h1{font-size:clamp(2.4rem,5.4vw,4.9rem);line-height:1.02}h2{font-size:clamp(1.9rem,3.2vw,3.2rem);line-height:1.08}.h2-sm{font-size:clamp(1.6rem,2.4vw,2.2rem)}
h3{font:600 1.08rem var(--display);letter-spacing:-.015em;color:var(--navy)}.h2like{font:300 clamp(1.7rem,2.6vw,2.4rem)/1.1 var(--display);letter-spacing:-.03em}
.lead{font-size:1.12rem;color:var(--muted);max-width:62ch}
.text-link{display:inline-flex;align-items:center;gap:.6rem;color:var(--navy);font-weight:600;border-bottom:1px solid currentColor;padding-bottom:.2rem;margin-top:8px}.text-link b{color:var(--cyan);font-size:1.2em;transition:transform .25s ease}.text-link:hover b{transform:translateX(4px)}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
.footnote{font-size:.78rem;color:var(--muted);margin:18px 0 0;max-width:90ch}.footnote--dark{color:#b9cde0}
.table-note{margin:18px 0 0;color:var(--ink);font-size:.95rem}
/* header */
.site-header{height:86px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;backdrop-filter:blur(12px);transition:box-shadow .25s}.site-header.scrolled{box-shadow:0 1px 0 var(--line),0 2px 6px rgba(14,35,64,.06)}
.nav{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand img{width:150px;height:auto}
.links{display:flex;align-items:center;gap:22px;font:600 11.5px var(--display);letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}.links>a{padding:8px 0;border-bottom:2px solid transparent;white-space:nowrap}.links>a:hover,.links>a.active{border-color:var(--cyan);color:var(--navy)}
.links>a.contact{color:var(--navy-deep);background:var(--cyan);padding:9px 14px;border-bottom:0}.links>a.contact:hover,.links>a.contact.active{color:var(--navy-deep);box-shadow:inset 0 -2px 0 var(--navy)}
.lang{display:flex;gap:6px;align-items:center;color:var(--line)}.lang button{background:none;border:0;padding:4px;font:600 11.5px var(--display);letter-spacing:.05em;color:var(--muted)}.lang button[aria-pressed=true]{color:var(--navy);border-bottom:2px solid var(--cyan)}
.menu{display:none;background:none;border:1px solid var(--navy);color:var(--navy);padding:9px 14px;font:600 11px var(--display);letter-spacing:.12em;text-transform:uppercase}
/* hero */
.hero{position:relative;background:var(--navy-deep);color:#fff;display:grid;align-items:center;min-height:min(720px,calc(100svh - 86px));overflow:hidden}.hero--page{min-height:520px}
.hero-bg{position:absolute;inset:0}.hero-bg picture,.hero-bg img{width:100%;height:100%;object-fit:cover}.hero-bg:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,35,64,.9) 0%,rgba(14,35,64,.55) 50%,rgba(14,35,64,.15))}
.hero-copy{position:relative;z-index:1;padding:clamp(56px,9vh,100px) 0;max-width:780px;margin-left:max(24px,calc((100% - 1240px)/2))}.hero .eyebrow{color:var(--cyan)}.hero h1{color:#fff;margin:.4rem 0 1.2rem}.hero h1 em{color:var(--cyan-web)}.hero-lead{max-width:56ch;color:#dbe7f2;font-size:1.1rem}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.hero-note{display:flex;gap:18px;margin-top:2rem;font-size:.85rem;color:#c3d4e4}.hero-note:before{content:"";width:38px;height:1px;background:var(--cyan);margin-top:.8em;flex:0 0 auto}
.button{display:inline-flex;align-items:center;padding:13px 22px;background:var(--cyan);color:var(--navy-deep);font:600 12px var(--display);text-transform:uppercase;letter-spacing:.08em;border:1px solid var(--cyan);transition:background .2s,color .2s}.button:hover{background:var(--paper)}
.button--outline{background:transparent;color:var(--navy);border-color:var(--navy)}.hero .button--outline,.blueband .button--outline{color:#fff;border-color:#fff}.button--outline:hover{background:var(--navy);color:#fff}.hero .button--outline:hover{background:#fff;color:var(--navy-deep)}
.tag{position:absolute;right:0;bottom:0;background:rgba(14,35,64,.85);color:#fff;font:600 10px var(--display);letter-spacing:.1em;text-transform:uppercase;padding:5px 9px;z-index:2}.hero-bg .tag{right:24px;bottom:20px}
figure{margin:0;position:relative}figcaption{font-size:.88rem;color:var(--muted);margin-top:12px}
/* sections */
.surface{background:var(--pale-2);box-shadow:0 0 0 100vmax var(--pale-2);clip-path:inset(0 -100vmax)}.surface-deep{background:var(--pale)}
.intro{padding:100px 0;display:grid;grid-template-columns:1.1fr .9fr;gap:8vw;align-items:end}.intro p{max-width:54ch;color:var(--muted)}.rule{border:0;border-top:1px solid var(--line);margin:0}
.facts-band{background:var(--navy);background:linear-gradient(90deg,var(--navy),var(--navy-deep));color:#fff;padding:30px 0 28px}
.facts{padding:34px 0;display:grid;grid-template-columns:repeat(3,1fr);gap:40px}.fact{border-left:2px solid var(--cyan);padding-left:18px}.fact strong{display:block;font:300 clamp(1.6rem,3vw,2.5rem) var(--display);color:var(--navy);letter-spacing:-.04em}.fact span{font-size:.9rem;color:var(--muted)}
.facts-band .fact strong,.facts-band .fact span{color:#fff}.facts-band .fact span{color:#cfdeec}.facts--light{padding:55px 0}
.split-product{display:grid;grid-template-columns:1fr 1fr;min-height:480px;align-items:center;background:var(--pale-2)}.product-photo{height:100%;min-height:400px;background:var(--pale);display:flex;align-items:center;justify-content:center;padding:6%;position:relative}.product-photo figure{width:100%}.product-photo img{max-height:420px;object-fit:contain;margin:auto}.product-copy{padding:clamp(36px,6vw,90px);max-width:700px}.product-copy p{color:var(--muted)}
.section-title{padding:96px 0 44px}.section-head{margin-bottom:34px}.section-head h2{margin:.3rem 0 0}
.tile-grid{display:grid;grid-template-columns:1fr 1fr}.tile{min-height:350px;position:relative;color:#fff;display:flex;align-items:flex-end;padding:36px;overflow:hidden;background:var(--navy-deep)}.tile-bg,.tile-bg img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.tile:before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(0deg,rgba(14,35,64,.85),rgba(14,35,64,.08) 75%)}.tile>div{position:relative;z-index:2}.tile h3{font:300 clamp(1.6rem,2.5vw,2.3rem)/1.1 var(--display);color:#fff;margin:0 0 14px}.tile .text-link{color:#fff;border:0;margin:0}.tile .tag{right:0;bottom:auto;top:0}
.chain-section{padding:90px 0}.chain{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.chain article{background:var(--paper);padding:34px}.chain strong{display:block;font:300 2.6rem var(--display);color:var(--cyan);margin-bottom:28px}.chain p{color:var(--muted);font-size:.94rem;margin:0}.chain h3{margin-bottom:10px}
.blueband{background:var(--navy);color:#fff;padding:80px 0}.blueband h2{color:#fff;max-width:20ch;margin-bottom:1.2rem}.blueband p{max-width:54ch;color:#dbe7f2}
/* page hero */
.page-hero{background:var(--pale);padding:clamp(56px,9vh,100px) 0 clamp(48px,7vh,72px);border-bottom:1px solid var(--line)}.page-hero h1{max-width:900px;margin:.45rem 0 1.2rem}.page-hero--short{padding-bottom:40px}
.hero-split{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}.datacenter-hero .page-hero,.datacenter-hero{background:var(--pale)}
.image-copy{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,7vw,110px);align-items:center;padding:90px 0}.image-copy.flip>figure{order:2}.image-copy figure{background:var(--pale);padding:26px}.image-copy figure img{width:100%;max-height:440px;object-fit:contain}.image-copy .tag{right:26px;bottom:26px}.image-copy figcaption{margin-top:12px}.image-copy p{color:var(--muted)}
.image-copy+.image-copy{border-top:1px solid var(--line)}
.ticks{margin:18px 0 22px;padding:0;list-style:none}.ticks li{padding:10px 0 10px 26px;border-bottom:1px solid var(--line);position:relative;color:var(--ink)}.ticks li:before{content:"";position:absolute;left:0;top:1.2em;width:12px;height:2px;background:var(--cyan)}
.steps{margin:18px 0 0;padding-left:1.3em;color:var(--muted)}.steps li{padding:5px 0 5px 4px}.steps li::marker{color:var(--navy);font-family:var(--mono);font-weight:600}
.simple-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:40px 55px;padding:20px 0 90px}.simple-grid p{color:var(--muted)}.why-onsite{padding-top:80px}
.datacenter-diagram{padding:72px 0}.diagram a{display:block;background:#fff;border:1px solid var(--line);cursor:zoom-in}.diagram img{width:100%}.zoom-hint{display:inline-block;margin-top:10px;font:600 10px var(--display);letter-spacing:.12em;text-transform:uppercase;color:var(--navy)}.diagram figcaption{max-width:90ch}
.family,.compare,.sankey,.gallery,.strip,.downloads{padding:72px 0 20px}
.sheet-list{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line);margin:0 0 90px}.sheet-list a{padding:24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px;font:500 1rem var(--display);color:var(--navy);background:var(--paper)}.sheet-list .arr{color:var(--cyan);font-size:1.4rem}.sheet-list a:hover{background:var(--pale)}
/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);margin-top:6px}.spec-table{width:100%;border-collapse:collapse;font-family:var(--mono);font-weight:500;font-size:.98rem;min-width:560px;background:var(--paper)}.spec-table--wide{min-width:760px}
.spec-table th,.spec-table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}.spec-table thead th{background:var(--navy-deep);color:#fff;font-weight:600;letter-spacing:.04em;text-transform:uppercase;font-size:.82rem}.spec-table tbody th{font-weight:600;color:var(--navy);width:34%}.spec-table tbody tr:nth-child(even){background:var(--pale-2)}.spec-table--compare tbody th{width:22%}
.spec-table--wide tbody th{width:28%}
/* tabs */
.tabs-section{padding:56px 0 80px}.tablist{display:flex;gap:0;border-bottom:1px solid var(--line);margin-bottom:0}.tablist--wrap{flex-wrap:wrap}.tablist button{background:none;border:0;border-bottom:3px solid transparent;margin-bottom:-1px;padding:14px 26px;font:600 13px var(--display);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.tablist button:hover{color:var(--navy)}.tablist button[aria-selected=true]{color:var(--navy);border-bottom-color:var(--cyan)}
.tabpanel[hidden]{display:none}.split-product--tab{margin-top:0;align-items:start}.split-product--tab .product-copy{padding:36px clamp(20px,4vw,56px);max-width:none}.split-product--tab .product-photo{align-self:stretch}.split-product--tab h2{margin:.5rem 0 20px}
.badge{display:inline-block;padding:5px 10px;border:1px solid var(--cyan);color:var(--navy);font:600 11px var(--display);letter-spacing:.1em;text-transform:uppercase;background:var(--pale)}
.fuel-panel{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,6vw,80px);padding:44px 0 0;align-items:start}.fuel-panel img{width:100%;aspect-ratio:3/2;object-fit:cover}.fuel-panel .tag{right:0;bottom:0}.fuel-panel h2{margin:.8rem 0 1rem}.fuel-panel p{color:var(--muted)}.where{margin:24px 0 0;font-size:.8rem;text-transform:uppercase;letter-spacing:.12em}
/* grids */
.two-up{display:grid;grid-template-columns:1fr 1fr;gap:24px}.three-up{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.two-up figure,.three-up figure{background:var(--pale);padding:14px}.two-up figcaption,.three-up figcaption{font-weight:500}.crop img{width:100%;height:300px;object-fit:cover}.crop{padding:0!important;background:none!important}
.evidence{padding:76px 0}.evidence-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);margin-top:36px;border:1px solid var(--line)}.evidence-grid article{background:var(--paper);padding:28px}.evidence-grid strong{display:block;font:300 2rem var(--display);color:var(--cyan);margin-bottom:14px}.evidence-grid h3{margin:0;line-height:1.4}
.subnav{position:sticky;top:86px;z-index:15;background:var(--paper);border-bottom:1px solid var(--line)}.chips{display:flex;gap:8px;overflow-x:auto;padding:12px 0}.chips a{white-space:nowrap;border:1px solid var(--line);padding:7px 14px;font:600 11px var(--display);letter-spacing:.06em;text-transform:uppercase;color:var(--navy)}.chips a:hover,.chips a.on{border-color:var(--cyan);background:var(--pale)}
[id]{scroll-margin-top:150px}
.evidence-text{padding:80px 0 30px}.compact{padding:30px 0 90px}.compact figure{max-width:760px;background:var(--pale);padding:20px}
.company-grid{padding:80px 0 40px;display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.plain-list{margin:0;padding:0;list-style:none}.plain-list li{padding:16px 0;border-bottom:1px solid var(--line);font:600 1.05rem var(--display);color:var(--navy)}.company-grid figure img{width:100%}
.timeline{list-style:none;margin:0;padding:50px 0 90px;display:grid;grid-template-columns:repeat(4,1fr);position:relative}.timeline:before{content:"";position:absolute;left:0;right:0;top:56px;height:1px;background:var(--line)}.timeline li{position:relative;padding:34px 20px 0 0}.timeline li:before{content:"";position:absolute;top:0;left:0;width:11px;height:11px;background:var(--cyan)}.timeline strong{display:block;font:300 2rem var(--display);color:var(--navy);margin-top:8px}.timeline span{color:var(--muted);font-size:.95rem}
/* contact */
.contact-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:clamp(36px,7vw,100px);padding:70px 0 100px;align-items:start}.field{margin-bottom:18px;display:flex;flex-direction:column}.field label{font:600 12px var(--display);letter-spacing:.06em;text-transform:uppercase;color:var(--navy);margin-bottom:6px}.req{color:var(--navy)}
input[type=text],input[type=email],input[type=tel],input[type=number],select,textarea{font:400 1rem var(--font);color:var(--ink);padding:12px 14px;border:1px solid var(--line);border-radius:0;background:var(--paper);width:100%}input:focus,select:focus,textarea:focus{border-color:var(--navy)}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:var(--navy);box-shadow:inset 3px 0 0 var(--cyan)}.err{font-size:.85rem;color:var(--navy);font-weight:500;min-height:0;margin-top:4px}.req-note{font-size:.85rem;color:var(--muted)}
.check{display:flex;gap:12px;align-items:flex-start;text-transform:none!important;font:400 .92rem var(--font)!important;letter-spacing:0!important;color:var(--ink)!important}.check input{margin-top:5px;width:18px;height:18px;accent-color:var(--navy);flex:0 0 auto}
.form-status{margin-top:18px;padding:0;font-size:.95rem}.form-status:not(:empty){padding:14px 16px;border-left:3px solid var(--cyan);background:var(--pale)}.form-status.is-error{border-left-color:var(--navy);background:var(--pale-2)}
.contact-side{border-left:1px solid var(--line);padding-left:36px}.side-block{margin-bottom:30px}.side-block address{font-style:normal;color:var(--muted)}.side-block p{color:var(--muted)}
/* footer */
.site-footer{background:var(--navy-deep);color:#c5d4e3;padding:56px 0 28px}.site-footer a{color:#fff;text-decoration:underline;text-underline-offset:3px}.footer-columns{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:clamp(32px,6vw,80px)}.footer-logo{width:160px;height:auto;margin-bottom:22px}.footer-columns p,.footer-columns address{font-size:.9rem;max-width:430px;font-style:normal}.footer-heading{margin:0 0 14px;color:#fff;font:600 .78rem var(--display);letter-spacing:.1em;text-transform:uppercase}.footer-links{list-style:none;padding:0;margin:14px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:6px 16px;font-size:.88rem}.footer-links a{text-decoration:none;color:#c5d4e3}.footer-links a:hover{color:var(--cyan)}
.copyright{border-top:1px solid rgba(255,255,255,.17);margin-top:40px;padding-top:20px;font-size:.75rem;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
/* lightbox */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(14,35,64,.94);display:flex;align-items:center;justify-content:center;padding:40px 20px}.lightbox[hidden]{display:none}.lightbox figure{max-width:min(96vw,1800px);max-height:92vh;display:flex;flex-direction:column;overflow:auto;background:#fff}.lightbox img{max-width:none;width:min(96vw,1800px);max-height:none}.lightbox-close{position:absolute;top:14px;right:18px;background:var(--cyan);color:var(--navy-deep);border:0;padding:10px 16px;font:600 12px var(--display);letter-spacing:.08em;text-transform:uppercase}
/* motion */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}.js .reveal.in{opacity:1;transform:none}
@media(max-width:1180px){.links{gap:14px;font-size:11px}}
@media(max-width:1000px){.menu{display:block}.links{display:none;position:absolute;top:86px;left:0;right:0;background:var(--paper);padding:14px 24px 20px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:2px}.links.open{display:flex}.links>a{padding:12px 0}.links>a.contact{text-align:center;margin-top:6px}.lang{padding-top:10px}.brand img{width:120px}.subnav{top:86px}}
@media(max-width:900px){.intro,.split-product,.image-copy,.hero-split,.company-grid,.fuel-panel,.contact-grid{grid-template-columns:1fr;gap:34px}.image-copy.flip>figure{order:0}.image-copy{padding:60px 0}.intro{padding:70px 0}.contact-side{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:28px}.evidence-grid,.chain,.three-up{grid-template-columns:1fr 1fr}.footer-columns{grid-template-columns:1fr}.hero-copy{margin-left:24px;margin-right:24px}}
@media(max-width:760px){.shell{width:min(100% - 36px,1240px)}.site-header{height:72px}.links{top:72px}.subnav{top:72px}.hero{min-height:560px}.hero-copy{margin-left:18px;margin-right:18px}.facts{grid-template-columns:1fr;gap:24px;padding:30px 0}.tile-grid,.sheet-list,.simple-grid,.two-up,.three-up,.evidence-grid,.chain{grid-template-columns:1fr}.tile{min-height:290px;padding:26px}.section-title{padding:64px 0 30px}.product-copy{padding:44px 24px}.timeline{grid-template-columns:1fr;padding:30px 0 60px}.timeline:before{left:5px;right:auto;top:30px;bottom:60px;width:1px;height:auto}.timeline li{padding:0 0 28px 30px}.timeline li:before{top:6px}.tablist button{padding:12px 14px}.blueband{padding:60px 0}.chain-section{padding:60px 0}.image-copy figure{padding:14px}.image-copy .tag{right:14px;bottom:14px}.footer-links{grid-template-columns:1fr 1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}.js .reveal{opacity:1;transform:none}}
.fact-foot{grid-column:1/-1}.fact-foot .footnote{margin:0}
@media(max-width:760px){.diagram{overflow-x:auto;overscroll-behavior-x:contain}.diagram a{min-width:1000px}.diagram img{width:1000px;max-width:none}.lightbox img.diagram-image{width:1000px}}

/* mobile: let single-column grid items shrink so spec tables scroll inside .table-wrap (2026-10-09) */
@media(max-width:900px){.split-product>*{min-width:0}}

/* typo-20261009: readability floor for small labels; consistent h3 leading */
.tag,.zoom-hint{font-size:11px}.eyebrow,.badge,.chips a{font-size:12px}h3{line-height:1.3}