@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Manrope:wght@400;500;600;650;700;750;800&display=swap');
:root{--ink:#191b18;--gold:#c7a569;--paper:#f7f6f2;--muted:#6c6f66;--line:#dcdcd4}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',Arial,sans-serif;font-size:16px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:5px}input:focus,textarea:focus,select:focus{outline:2px solid #947131;outline-offset:2px}.skip{position:fixed;top:-100px;left:15px;z-index:100;background:white;padding:12px}.skip:focus{top:10px}.utility{background:var(--ink);color:#d9d9ce;display:flex;justify-content:space-between;padding:9px 4.5%;font-size:10px;letter-spacing:1.6px}.utility span:last-child{letter-spacing:.2px;color:#c7b491}header{height:99px;display:flex;align-items:center;justify-content:space-between;padding:0 4.5%;background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:12px;font-family:'Manrope',sans-serif;font-weight:800;font-size:20px;letter-spacing:.6px;line-height:1.15}.brand svg{width:47px;height:47px;fill:none;stroke:var(--gold);stroke-width:3}.brand small{display:block;font-size:12px;letter-spacing:5.8px;font-weight:500;margin-top:6px}nav{display:flex;align-items:center;gap:35px;font-size:13px;font-weight:550}nav>a:not(.nav-cta):hover{color:#8a672e}.nav-cta{padding:13px 22px;background:var(--ink);color:white;margin-left:10px}.nav-cta span{color:var(--gold);margin-left:22px}.menu{display:none}.hero{position:relative;min-height:650px;margin:23px 24px 0;overflow:hidden;background:#282b25;color:white}.hero-img{position:absolute;inset:0;background:url('assets/air-filter-service.png') center center/cover}.hero:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(13,18,14,.87),rgba(15,19,15,.45) 48%,rgba(20,20,16,.03)),linear-gradient(0deg,rgba(10,12,10,.7),transparent 30%)}.hero-content{position:relative;z-index:1;padding:60px 5.6% 100px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:700;color:var(--gold);margin:0 0 25px;display:flex;align-items:center;gap:10px}.eyebrow span{height:5px;width:5px;background:var(--gold);border-radius:50%}h1,h2,h3,p{margin-top:0}h1,h2{font-family:'Manrope',Arial,sans-serif;font-weight:500;letter-spacing:-3px;line-height:1.04}h1{font-size:clamp(55px,5.8vw,86px);margin-bottom:24px}em{font-family:Georgia,'Times New Roman',serif;font-weight:400}h1 em{color:#d8bd88}.hero-desc{color:#e3e4db;font-size:16px;line-height:1.75;margin-bottom:27px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:34px;padding:16px 22px;font-size:12px;font-weight:700;border:0;cursor:pointer;transition:background .2s,transform .2s}.gold{background:var(--gold);color:#171916}.gold:hover{background:#dfc18d;transform:translateY(-2px)}.button span{font-size:21px;line-height:1}.hero-bottom{position:absolute;bottom:25px;left:5.6%;right:5.6%;z-index:2;display:flex;justify-content:space-between;border-top:1px solid #ffffff38;padding-top:18px;font-size:9px;letter-spacing:1.4px;color:#d2d5cb}.hero-bottom a{font-size:11px;letter-spacing:0}.hero-bottom a span{color:var(--gold);margin-left:28px}.focus-strip{display:flex;justify-content:space-between;gap:20px;max-width:1230px;margin:auto;padding:28px 28px;border-bottom:1px solid var(--line);font-size:10px;font-weight:650;letter-spacing:1.5px}.focus-strip i{font-style:normal;color:#9c7a43;margin-right:15px}.section{padding:95px max(6.8%,calc((100vw - 1180px)/2));scroll-margin-top:5px}.intro{display:grid;grid-template-columns:1fr 1fr;gap:9%}.dark{color:#8a692f}h2{font-size:clamp(37px,4vw,55px);margin-bottom:30px;line-height:1.1;letter-spacing:-2px}h2 em{color:#85877b}.intro-copy{padding-top:29px;color:var(--muted);font-size:14px}.lead{font-size:23px;line-height:1.45;color:var(--ink);letter-spacing:-.5px}.text-link{font-weight:650;color:var(--ink);font-size:12px;display:flex;justify-content:space-between;max-width:325px;border-bottom:1px solid var(--gold);padding:10px 0}.text-link span{color:#8a692f}.services{background:#eeeee7}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:42px}.section-heading h2{margin-bottom:0}.section-heading>p{color:var(--muted);font-size:13px;margin-bottom:5px}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.service-grid article{border-top:1px solid #b8bbad;padding-top:24px}.service-top{display:flex;justify-content:space-between;align-items:center;height:70px;margin-bottom:28px}.service-top>span{font-size:9px;letter-spacing:1.1px;color:#77796f}.service-top svg{width:61px;height:61px;fill:none;stroke:#987740;stroke-width:1.3}.service-grid h3{font-family:'Manrope',sans-serif;font-size:24px;line-height:1.3;font-weight:500;letter-spacing:-.7px}.service-grid p{font-size:13px;color:var(--muted);min-height:86px;max-width:300px}.service-grid a{display:flex;justify-content:space-between;gap:12px;font-size:11px;font-weight:600;border-top:1px solid #d1d2c8;padding-top:18px}.service-grid a:hover{color:#8a692f}.service-grid a span{color:#987740;font-size:18px}.approach{display:grid;grid-template-columns:1fr 1fr;gap:9%;align-items:center}.approach-desc{font-size:14px;color:var(--muted)}.filter-art{position:relative;min-height:525px;background:#dedfd5;display:flex;align-items:center;justify-content:center;overflow:hidden;background-image:radial-gradient(#f7f6f2 1px,transparent 1px);background-size:9px 9px}.art-label{position:absolute;top:27px;left:27px;font-size:9px;letter-spacing:1.5px;color:#646858}.filter-art>span{position:absolute;bottom:27px;left:27px;font-size:8px;letter-spacing:1.4px;color:#646858}.filter-model{width:66%;aspect-ratio:.85;transform:perspective(800px) rotateY(-23deg) rotateZ(12deg);background:#d9d8cc;padding:16px;border:2px solid #adaea2;box-shadow:26px 27px 40px #363c353b,6px 4px 0 #a9ac9e,inset 2px 2px 1px white}.pleats{height:100%;border:2px solid #9e9f90;background:repeating-linear-gradient(90deg,#a6a89d 0,#d8dacd 3px,#fbfcf3 7px,#d4d7c8 10px,#878d7d 12px);box-shadow:inset 0 4px 8px #4d544d40}.steps{list-style:none;margin:28px 0 0;padding:0}.steps li{display:flex;gap:23px;border-top:1px solid var(--line);padding:20px 0 8px}.steps li>span{font-size:11px;color:#987740}.steps h3{font-size:14px;font-weight:550;margin:0 0 5px}.steps p{font-size:12px;line-height:1.7;color:var(--muted);margin-bottom:7px}.applications{background:var(--ink);color:#f3f4eb}.applications-title{display:flex;align-items:flex-end;justify-content:space-between;gap:25px}.applications h2{font-size:clamp(32px,3.6vw,49px)}.applications h2 em{color:#b8ac91}.applications-title>p{font-size:12px;color:#aaafa3;margin-bottom:35px}.industry-list{margin-top:20px}.industry-list>div{display:grid;grid-template-columns:45px 1.2fr 1fr;align-items:center;gap:20px;border-top:1px solid #45483d;padding:25px 0}.industry-list>div:last-child{border-bottom:1px solid #45483d}.industry-list h3{font-size:20px;font-weight:400;margin:0;letter-spacing:-.4px}.industry-list span:first-child{color:var(--gold);font-size:11px}.industry-list span:last-child{color:#aaafa3;text-align:right;font-size:11px}.application-note{font-size:10px;color:#aaafa3;margin:20px 0 0}.faq{display:grid;grid-template-columns:1fr 1fr;gap:9%}.faq h2{font-size:43px}details{border-top:1px solid var(--line)}details:last-child{border-bottom:1px solid var(--line)}summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;font-size:14px;font-weight:500;padding:23px 0}summary::-webkit-details-marker{display:none}summary span{color:#987740;font-size:20px;line-height:1}details[open] summary span{transform:rotate(45deg)}details p{font-size:13px;color:var(--muted);padding-right:25px}.contact{display:grid;grid-template-columns:1fr 1fr;gap:9%;background:#eae8df}.contact h2{font-size:65px}.contact>div>p:not(.eyebrow){font-size:15px;color:#666a60}.contact-note{display:flex;gap:15px;border-top:1px solid #cdcec1;margin-top:44px;padding-top:23px;max-width:325px}.contact-note>span{color:#97753d;font-size:26px}.contact-note p{font-size:11px;color:#6c6f66}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}label{display:block;font-size:11px;font-weight:550;margin-bottom:18px}input,select,textarea{display:block;width:100%;border:0;border-bottom:1px solid #bebfb0;background:transparent;border-radius:0;padding:10px 0;color:var(--ink);font-size:13px}textarea{resize:vertical}input::placeholder,textarea::placeholder{color:#76796f;font-size:12px}form .button{width:100%;margin-top:5px}.form-note{font-size:10px;color:#66695e;margin:10px 0}#form-status{font-size:12px;line-height:1.7;color:#3d4c32;margin:10px 0 0}footer{background:var(--ink);color:#f3f3e9;padding:48px 6.8% 20px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:35px}footer>.brand{font-size:17px}footer .brand small{font-size:10px;letter-spacing:5px}footer>span,footer>a:last-of-type{font-size:11px;color:#b5b9ab}.footer-bottom{border-top:1px solid #45483d;padding-top:20px;display:flex;justify-content:space-between;gap:20px;width:100%;font-size:9px;color:#a9ae9e}
@media(min-width:1600px){.hero{max-width:1550px;margin-left:auto;margin-right:auto}.hero-content{padding-left:max(6%,calc((100% - 1180px)/2))}}@media(max-width:900px){nav{gap:20px}.brand{font-size:16px}.brand small{font-size:10px;letter-spacing:4.6px}.section{padding:70px 6%}.hero{margin:16px 16px 0;min-height:640px}.hero-content{padding-top:65px}.intro,.approach,.contact,.faq{gap:6%}.filter-art{min-height:470px}.service-grid{gap:20px}.service-grid h3{font-size:21px}.service-grid p{min-height:110px}.industry-list h3{font-size:17px}.applications-title{display:block}.applications-title>p{margin-bottom:25px}.contact h2{font-size:55px}.faq h2{font-size:36px}}
@media(max-width:650px){html{scroll-padding-top:85px}.utility{font-size:8px;letter-spacing:1px;padding:8px 6%}.utility span:last-child{font-size:8px}header{height:79px;padding:0 6%}.brand svg{width:39px;height:39px}.brand{font-size:16px;gap:9px}.menu{display:block;border:1px solid var(--line);background:transparent;width:40px;height:38px;font-size:19px;color:var(--ink)}nav{display:none;position:absolute;top:79px;left:0;right:0;background:var(--paper);padding:20px 6% 28px;border-bottom:1px solid var(--line);box-shadow:0 10px 20px #0001}nav.open{display:flex;align-items:stretch;flex-direction:column;gap:15px}.nav-cta{margin:0;display:flex;justify-content:space-between}.hero{margin:10px 10px 0;min-height:645px}.hero-content{padding:47px 7% 100px}.hero-img{background-position:66% center}.hero:after{background:linear-gradient(90deg,#10140fd9,#10140f75),linear-gradient(0deg,#10140fbb,transparent 70%)}h1{font-size:58px;letter-spacing:-2.8px}.hero-desc{font-size:14px;max-width:270px}.eyebrow{font-size:9px;letter-spacing:1.5px;margin-bottom:23px}.hero-bottom{left:7%;right:7%;align-items:center}.hero-bottom>span{font-size:7px;max-width:120px}.hero-bottom a{font-size:10px}.hero-bottom a span{margin-left:12px}.focus-strip{padding:22px 6%;gap:14px;font-size:8px;letter-spacing:.5px;align-items:flex-start}.focus-strip span{flex:1}.focus-strip i{display:block;margin-bottom:6px}.section{padding:60px 7%}.intro,.approach,.contact,.faq{grid-template-columns:1fr;gap:25px}h2{font-size:42px}.intro-copy{padding:0}.lead{font-size:21px}.section-heading{display:block;margin-bottom:30px}.section-heading>p{margin-top:20px}.service-grid{grid-template-columns:1fr;gap:30px}.service-grid h3 br{display:none}.service-grid h3{font-size:25px;margin-bottom:15px}.service-grid p{min-height:0;max-width:none}.service-top{margin-bottom:10px}.service-grid article{padding-top:10px}.filter-art{min-height:410px;order:2;margin-top:15px}.filter-model{width:57%}.approach h2{margin-bottom:20px}.applications h2{font-size:36px}.industry-list>div{grid-template-columns:25px 1fr;gap:10px;padding:23px 0}.industry-list h3{font-size:17px}.industry-list span:last-child{grid-column:2;text-align:left;font-size:10px}.faq h2{font-size:38px;margin-bottom:15px}.contact h2{font-size:55px}.contact-note{margin-top:24px;max-width:none}.form-row{gap:16px}.contact form{margin-top:10px}footer{padding:40px 7% 20px;gap:25px}footer>.brand{width:100%}footer>span{font-size:10px}.footer-bottom{flex-direction:column;gap:10px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* Company-supplied artwork, framed without modifying the original PNG. */
.brand .logo-window{display:block;position:relative;width:270px;height:67px;overflow:hidden;flex:none}
.brand .logo-window img{position:absolute;width:357px;height:auto;max-width:none;left:-47px;top:-79px}
footer>.brand{background:#fff;padding:10px 16px;border-radius:2px}
@media(max-width:900px){.brand .logo-window{width:230px;height:59px}.brand .logo-window img{width:304px;left:-40px;top:-67px}nav{gap:20px}}
@media(max-width:650px){.brand .logo-window{width:235px;height:60px}.brand .logo-window img{width:310px;left:-41px;top:-69px}footer>.brand{width:auto}}
@media(max-width:360px){.brand .logo-window{width:200px;height:52px}.brand .logo-window img{width:264px;left:-35px;top:-59px}}

/* Facility location fields */
.form-row.location-row{grid-template-columns:minmax(0,1.25fr) minmax(0,1.25fr) minmax(0,.8fr)}
.location-row label{min-width:0}
@media(max-width:450px){.form-row.location-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.location-row label:first-child{grid-column:1/-1}}
/* Product catalogue */
.products{background:#fff}
.products-label{font-size:10px;letter-spacing:1.6px;color:#77796f;margin-bottom:20px}
.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line)}
.product-card{padding:25px 27px 20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-direction:column;min-height:210px;transition:background .2s}
.product-card:hover{background:#f4f1e9}
.product-meta{display:flex;justify-content:space-between;gap:12px;font-size:9px;color:#77796f;letter-spacing:1px}
.product-meta>span:first-child{color:#987740}
.product-card h3{font-family:'Manrope',Arial,sans-serif;font-size:23px;font-weight:500;line-height:1.3;letter-spacing:-.6px;margin:25px 0}

.more-products{display:grid;grid-template-columns:1fr 2fr;gap:30px;margin-top:50px}
.more-products>h3{font-size:22px;font-family:'Manrope',Arial,sans-serif;font-weight:500;letter-spacing:-.5px}
.product-list{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}
.product-list>a{display:flex;justify-content:space-between;gap:14px;border-bottom:1px solid var(--line);padding:12px 0;font-size:13px}
.product-list>a>span{color:#987740}
.product-list>a:hover{color:#8a672e}
.product-request{margin-top:50px;padding:30px;background:var(--paper);display:flex;gap:35px;align-items:center;justify-content:space-between;border-left:3px solid var(--gold)}
.product-request h3{font-size:20px;font-weight:500;margin-bottom:9px;letter-spacing:-.4px}
.product-request p{font-size:13px;color:var(--muted);max-width:590px;margin:0}
.product-request .button{flex-shrink:0}
@media(min-width:651px) and (max-width:1000px){nav{gap:15px;font-size:12px}.nav-cta{padding:12px 15px;margin-left:0}.nav-cta span{margin-left:8px}.brand .logo-window{width:210px;height:54px}.brand .logo-window img{width:278px;left:-37px;top:-62px}}
@media(max-width:900px){.product-card{padding:23px 19px;min-height:220px}.product-card h3{font-size:21px}.product-meta{font-size:8px;letter-spacing:.5px}.product-request{align-items:flex-start;flex-direction:column;gap:22px}}
@media(max-width:650px){.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.product-card{min-height:210px;padding:20px 17px}.product-card h3{font-size:20px}.product-meta{flex-direction:column;gap:5px}.more-products{grid-template-columns:1fr;gap:10px;margin-top:36px}.product-list{gap:0 22px}.product-list>a{font-size:12px}.product-request{margin-top:36px;padding:24px}.product-request h3{font-size:20px}.product-request .button{width:100%}}
@media(max-width:380px){.product-grid{grid-template-columns:1fr}.product-card{min-height:180px}.product-meta{flex-direction:row}.product-list{grid-template-columns:1fr}}
@media(min-width:651px) and (max-width:850px){header{height:79px}.menu{display:block;border:1px solid var(--line);background:transparent;width:40px;height:38px;font-size:19px;color:var(--ink)}nav{display:none;position:absolute;top:79px;left:0;right:0;background:var(--paper);padding:20px 6% 28px;border-bottom:1px solid var(--line);box-shadow:0 10px 20px #0001}nav.open{display:flex;align-items:stretch;flex-direction:column;gap:15px}.nav-cta{margin:0;display:flex;justify-content:space-between}}

#product-field[hidden]{display:none!important}
#email-fallback[hidden]{display:none!important}
form .button #compose-label{font-size:12px;line-height:1.5}
.copy-inquiry{background:none;border:0;border-bottom:1px solid var(--gold);padding:10px 0;cursor:pointer;font-size:12px;color:var(--ink);font-weight:600}
#email-fallback{margin-top:15px}

#provider-choice[hidden]{display:none!important}
#provider-choice{margin:18px 0;padding:18px;border-left:3px solid var(--gold);background:#ffffff55}
#provider-choice label{margin-bottom:8px}

form .button.retry-draft{width:auto;background:var(--ink);color:var(--paper);padding:12px 22px;gap:28px}
form .button.retry-draft:hover{background:#34372e}
.product-picture{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:contain;margin:20px 0;background:#eeece6}
.product-card h3{margin:0 0 22px;min-height:2.6em}
@media(max-width:650px){.product-picture{margin:18px 0}.product-card h3{font-size:19px}}

/* Separate pages and current navigation. */
nav a[aria-current="page"]{text-decoration:underline;text-underline-offset:7px;text-decoration-color:var(--gold);text-decoration-thickness:2px}
.page-title{font-size:clamp(37px,4vw,55px);line-height:1.1;letter-spacing:-2px;margin-bottom:30px}
.page-title em{color:#85877b}
.section-heading .page-title{margin-bottom:0}
.page-label{color:#8a692f;grid-column:1/-1}
.page-contact .contact,.page-services .services{row-gap:25px}
.page-applications .page-label{color:var(--gold)}
.page-applications .page-title em{color:#b8ac91}
.page-cta{display:flex;align-items:center;justify-content:space-between;gap:30px;background:#eae8df}
.page-cta h2{font-size:36px;margin-bottom:12px}
.page-cta p{margin:0;color:var(--muted)}
.page-cta .button{flex-shrink:0}
@media(max-width:650px){.page-title{font-size:42px}.page-cta{align-items:flex-start;flex-direction:column}.page-cta h2{font-size:32px}}

/* Product inquiry tooltips keep the whole card clickable. */
.product-card{position:relative}
.product-card h3{margin-bottom:0}
.product-tooltip{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;width:max-content;max-width:calc(100% - 24px);padding:9px 13px;background:var(--ink);color:var(--paper);border:1px solid var(--gold);border-radius:3px;box-shadow:0 4px 14px #0002;font-size:12px;line-height:1.4;text-align:center;opacity:0;visibility:hidden;transition:opacity .15s}
.product-card:not(.tooltip-dismissed):is(:hover,:focus-visible) .product-tooltip{opacity:1;visibility:visible}

/* Industrial plant image beside the operation planning section. */
.operation-photo{display:block;width:100%;height:auto;aspect-ratio:4/5;object-fit:cover;max-height:620px}
@media(max-width:650px){.operation-photo{order:2;margin-top:15px;max-height:none}}

/* Shared footer contact details. */
.footer-contact{margin:0 0 0 auto;padding:0 30px}
.footer-contact h2{font-family:Manrope,Arial,sans-serif;font-size:12px;font-weight:600;line-height:1.5;letter-spacing:1.4px;text-transform:uppercase;color:var(--gold);margin:0 0 12px}
.footer-contact address{display:flex;flex-direction:column;gap:8px;font-style:normal;font-size:14px;line-height:1.5}
.footer-contact a:hover{text-decoration:underline;text-underline-offset:4px}
@media(max-width:650px){.footer-contact{width:100%;margin:0;padding:0}}

.button.contact-button{gap:12px}


.developer-credit a{text-decoration:underline;text-underline-offset:3px}
.developer-credit a:hover{color:var(--gold)}