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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}.preloader{display:none}}
/* Delta-specific content and presentation */
.logo{background:#fff;border-radius:6px;padding:7px 13px;width:158px;box-shadow:0 4px 20px #0000000a}.logo img{height:63px;object-fit:contain}.nav{height:105px}.nav nav{gap:22px}.nav nav a{font-size:11px}.nav-phone{display:none}header.scrolled .logo img{height:48px}.hero{min-height:850px}.hero h1{font-size:clamp(44px,5.1vw,72px);max-width:920px;line-height:1.08}.hero .lead{font-size:16px;max-width:640px}.hero-slides{position:absolute;inset:0;z-index:-3;overflow:hidden}.hero-slides .hero-bg{z-index:0;opacity:0;transform:scale(1.07);animation:none;transition:opacity 1.3s ease,transform 8s linear;object-position:center}.hero-slides .hero-bg.active{opacity:1;transform:scale(1)}.hero-shade{background:linear-gradient(90deg,#0e0f10e8,#0e0f1090 58%,#0e0f1050),linear-gradient(0deg,#0e0f10d9,transparent)}.hero-disciplines{margin-bottom:40px}.slider-controls{position:absolute;bottom:26px;left:max(32px,calc((100% - 1176px)/2));display:flex;align-items:center;gap:18px;z-index:3}.slider-controls>button{width:33px;height:33px;border:1px solid #ffffff30;border-radius:50%;display:grid;place-items:center;background:#16181a50;color:#ddd;transition:background .3s}.slider-controls>button:hover{background:var(--red)}.slider-controls>span{font:9px var(--mono);letter-spacing:1px;color:#abb2b9}.slider-dots{display:flex;gap:8px}.slider-dots button{width:24px;height:18px;background:transparent;position:relative}.slider-dots button:after{content:'';position:absolute;left:0;right:0;height:2px;top:8px;background:#ffffff40;transition:background .3s}.slider-dots button.active:after{background:var(--accent)}.section-head h2{line-height:1.12}.service-grid{grid-template-columns:1fr 1fr;gap:25px}.service-card{position:relative;min-height:410px;display:block;isolation:isolate;border:1px solid #ffffff18;border-radius:8px;background:#181c1f;overflow:hidden;transform:none}.service-image{position:absolute;inset:0;width:100%;height:100%;z-index:-2}.service-image img{height:100%;object-fit:cover;transition:transform 1.2s cubic-bezier(.2,.7,.3,1)}.service-card:after{content:'';position:absolute;inset:0;background:linear-gradient(0deg,#090e12fa 0%,#090e12d9 20%,#090e1250 57%,#090e1210 100%);z-index:-1;transition:opacity .5s}.service-card:hover{transform:translateY(-4px);border-color:#c6282890}.service-card:hover img{transform:scale(1.05)}.service-index{position:absolute;left:25px;top:23px;font:9px var(--mono);letter-spacing:1.5px;color:#fff;background:#15191ca8;padding:7px 10px;border:1px solid #ffffff15;backdrop-filter:blur(8px)}.service-body{position:absolute;left:0;right:0;bottom:0;padding:30px;display:block}.service-body h3{font-size:27px;font-weight:700;line-height:1.2;margin-bottom:12px;text-shadow:0 2px 20px #0009}.service-body p{color:#c8ced2;font-size:12px;min-height:0;max-width:380px;line-height:1.8;text-shadow:0 2px 10px #0008}.explore{margin-top:22px;font-size:8px;letter-spacing:1.2px;color:#f58c85;justify-content:space-between}.explore b{border:1px solid #ffffff35;border-radius:50%;width:30px;height:30px;display:grid;place-items:center;font-size:17px;color:#fff}.service-card:nth-child(2) .service-image img{object-position:center 45%}.products{background:#191c1f;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}.product-card>div{height:280px;position:relative;overflow:hidden;border-radius:6px;background:#242a2e}.product-card img{height:100%;object-fit:cover;transition:transform .8s}.product-card:hover img{transform:scale(1.04)}.product-card>div>span{position:absolute;left:16px;top:16px;background:#0e0f10bb;padding:5px 9px;font:9px var(--mono);color:#eee}.product-card h3{font-size:20px;line-height:1.3;margin:22px 0 12px}.product-card p{font-size:12px;line-height:1.8;max-width:320px;color:#9da6ad}.product-card>b{font:9px var(--mono);color:var(--accent);display:inline-block;margin-top:20px;font-weight:400}.delta-services{background:#0e0f10}.delta-service-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}.delta-service-grid article{padding:32px 25px 5px;border-right:1px solid var(--line)}.delta-service-grid article:first-child{padding-left:0}.delta-service-grid article:last-child{border:0}.delta-service-grid article>span{font:8px var(--mono);letter-spacing:1px;color:var(--accent)}.delta-service-grid h3{font-size:20px;line-height:1.4;margin:24px 0 15px}.delta-service-grid p{font-size:12px;line-height:1.9}.about-image>img{object-position:30% center}.image-note{padding:20px}.footer-grid .logo{width:170px}.footer-grid .logo img{height:62px}.reveal{transition:opacity .9s cubic-bezier(.2,.7,.3,1),transform .9s cubic-bezier(.2,.7,.3,1)}.service-card.reveal,.product-card.reveal{transform:translateY(30px)}.service-card.reveal.visible,.product-card.reveal.visible{transform:none}.service-card.reveal.visible:hover{transform:translateY(-5px)}.service-card:nth-child(even),.product-card:nth-child(2){transition-delay:.1s}.sector-card{transition:transform .5s,border-color .5s}.sector-card:hover{transform:translateY(-4px);border-color:#9b3131}.hero-actions .btn{transition:transform .3s,box-shadow .3s}.hero-actions .btn:hover{box-shadow:0 8px 28px #c6282840}#services,#systems,#products{scroll-margin-top:15px}
@media(max-width:991px){.nav{height:93px}.logo{width:140px;padding:5px 10px}.logo img{height:58px}.nav nav{top:93px}.hero h1{font-size:59px}.hero{min-height:830px}.hero .lead{font-size:15px}.service-card{min-height:370px}.service-body{padding:25px}.service-body h3{font-size:23px}.service-body p{font-size:11px}.product-card>div{height:240px}.product-card h3{font-size:18px}.delta-service-grid{grid-template-columns:1fr 1fr;gap:25px;border:0}.delta-service-grid article{padding:25px 0!important;border:0;border-top:1px solid var(--line)!important}.delta-service-grid h3{font-size:21px}.slider-controls{left:28px}.about-copy h2{font-size:32px}.about-copy p{font-size:13px}}
@media(max-width:575px){.nav{height:88px}.logo{width:126px;padding:4px 9px}.logo img{height:58px}header.scrolled .logo img{height:44px}.nav nav{top:87px}.nav-actions{gap:13px}.hero{min-height:800px;max-height:980px}.hero>.container{padding-top:155px;padding-bottom:85px}.hero h1{font-size:42px;line-height:1.14;letter-spacing:-1.6px;max-width:350px}.hero h1 span{font-size:37px}.hero .lead{font-size:12px;line-height:1.9;max-width:330px}.hero .eyebrow{font-size:7px}.hero-disciplines{margin-bottom:15px;gap:14px 19px;max-width:340px}.hero-disciplines span{font-size:6px;letter-spacing:.5px}.hero-actions{gap:11px}.hero-actions .btn{font-size:8px;padding:13px 14px}.hero-slides .hero-bg{object-position:60% center}.slider-controls{left:22px;bottom:24px;gap:13px}.slider-controls>button{width:29px;height:29px;font-size:12px}.slider-controls>span{font-size:8px}.slider-dots{gap:6px}.slider-dots button{width:20px}.service-grid{grid-template-columns:1fr;gap:22px}.service-card{min-height:380px}.service-body{padding:27px 24px}.service-body h3{font-size:25px}.service-body p{font-size:12px;line-height:1.9;max-width:320px}.service-index{top:20px;left:20px;font-size:8px}.explore{font-size:8px;margin-top:20px}.product-grid{grid-template-columns:1fr;gap:35px}.product-card>div{height:300px}.product-card h3{font-size:23px;margin:20px 0 11px}.product-card p{font-size:12px}.product-card>b{margin-top:15px}.delta-service-grid{grid-template-columns:1fr 1fr;gap:25px 20px}.delta-service-grid article>span{font-size:7px;letter-spacing:.3px}.delta-service-grid h3{font-size:18px;margin:20px 0 13px;line-height:1.3}.delta-service-grid p{font-size:11px}.about-copy h2{font-size:31px}.footer-grid .logo{width:160px}.footer-grid .logo img{height:60px}.section-head h2{font-size:31px}}
@media(prefers-reduced-motion:reduce){.hero-slides .hero-bg{transition:none;transform:none}.service-card,.product-card,.hero-bg{animation:none!important;transition:none!important}}
/* Approved light photographic header and three coordinated slide images. */
.logo,header .logo,.footer-grid .logo{position:relative;background:transparent;border:0;border-radius:0;padding:0;box-shadow:none;isolation:auto}.logo:before,.footer-grid .logo:before,.footer-grid>div:first-child:before{display:none!important;content:none!important}.logo img,header.scrolled .logo img,.footer-grid .logo img{filter:none!important;mix-blend-mode:normal;opacity:1;background:transparent;box-shadow:none;border:0;outline:none}.logo{width:163px}.logo img{height:78px}header{background:transparent;border:0;padding:0;box-shadow:none;backdrop-filter:none}header:before{display:none;content:none}.nav{height:105px}.nav nav a{color:#22292d;font-weight:600;text-shadow:none}.nav-phone{color:#30383d}#menuToggle span{background:#252c30}header.scrolled{background:#e4e6e1f5;backdrop-filter:blur(12px);border-bottom:1px solid #22222210;box-shadow:0 4px 20px #00000008}header.scrolled .nav{height:80px}header.scrolled .logo img{height:64px}.hero-shade{background:linear-gradient(180deg,transparent 0%,transparent 14%,#10161b15 21%,#10161b85 32%,#10161bd6 47%,#10161beb 100%)}.hero-shade:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#0c12163d,transparent 80%);mask-image:linear-gradient(180deg,transparent 0%,transparent 23%,#000 45%)}.hero-blueprint{mask-image:linear-gradient(180deg,transparent 0%,transparent 20%,#000 50%)}.hero-slides .hero-bg{object-position:center top}.hero-slides .hero-bg.active{transform:scale(1)}.hero h1{font-size:clamp(44px,4.8vw,68px);line-height:1.1;max-width:940px}.hero>.container{padding-top:220px}.hero .lead{font-size:15px}.hero-disciplines{color:#afb6bc}.footer-grid .logo{width:190px;margin-bottom:20px}.footer-grid .logo img{height:91px}footer{background:#dfe3df;color:#283239;position:relative;isolation:isolate;border-top:1px solid #aeb7b14d;padding-top:70px;overflow:hidden}footer:before{content:'';position:absolute;inset:0;background:url('assets/hero-suppression.webp') center 37%/cover no-repeat;opacity:1;z-index:-2}footer:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#e4e7e2eb 0%,#e4e7e2d9 43%,#e4e7e2cc 100%);z-index:-1}.footer-grid h4{color:#263138}.footer-grid p{color:#536169}.footer-grid>div>a:not(.logo):not(.social){color:#495860}.footer-grid>div>a:not(.logo):not(.social):hover{color:var(--red)}.footer-grid .social{border-color:#77857d50;background:transparent;color:var(--red)}.footer-bottom{color:#67746f;border-top-color:#68776f40}.footer-bottom>span:last-child{color:#53625a}
@media(max-width:991px){.nav{height:94px}.logo{width:144px}.logo img{height:69px}.nav nav{top:93px}.nav nav a,.nav nav.open a{color:#dce1e4!important}.hero h1{font-size:56px}.hero>.container{padding-top:220px}.hero .lead{font-size:14px}.hero-slides .hero-bg{object-position:40% top}.hero-shade{background:linear-gradient(180deg,transparent 0%,transparent 15%,#10161b35 24%,#10161bbd 38%,#10161be8 60%,#10161bf0 100%)}}
@media(max-width:575px){.nav{height:88px}.logo{width:130px}.logo img{height:64px}header.scrolled .logo img{height:55px}.nav nav{top:87px}.hero{min-height:820px}.hero>.container{padding-top:200px;padding-bottom:85px}.hero h1{font-size:39px;letter-spacing:-1.4px;line-height:1.15;max-width:345px}.hero h1 span{font-size:35px}.hero .lead{font-size:12px;line-height:1.9}.hero-slides .hero-bg{object-position:31% top}.hero-shade{background:linear-gradient(180deg,transparent 0%,transparent 14%,#10161b40 23%,#10161bc9 37%,#10161bed 64%,#10161bf5 100%)}.footer-grid .logo{width:180px}.footer-grid .logo img{height:86px}footer{padding-top:50px}footer:before{background-position:34% center}footer:after{background:#e4e7e2e8}}
@media(prefers-reduced-motion:reduce){.hero-slides .hero-bg{transform:none!important;transition:none!important}}
/* Final approved reference-matched photography already contains the tonal gradient. */
.hero-shade{background:transparent!important}.hero-shade:after{display:none!important}.hero-blueprint{display:none}.hero-slides .hero-bg{object-position:center top}.hero .lead{text-shadow:0 1px 8px #0007}.hero h1{text-shadow:0 2px 20px #0002}.hero-slides .hero-bg.active{transform:scale(1)}
@media(max-width:575px){.hero-slides .hero-bg{object-position:35% top}.hero .eyebrow{letter-spacing:1px}}
/* Dark photographic footer, retaining natural light only at the logo position. */
footer{background:#11181d;color:#e2e6e8;padding-top:42px;border-top:1px solid #ffffff18}footer:before{background:url('assets/hero-sprinklers.webp') center top/cover no-repeat;opacity:1}footer:after{background:linear-gradient(90deg,transparent 0%,#10161b35 19%,#10161bd9 43%,#10161bee 100%),linear-gradient(180deg,transparent 0%,transparent 26%,#10161b6b 36%,#10161bdb 49%,#10161bf0 100%)}.footer-grid .logo{width:180px;margin-bottom:30px}.footer-grid .logo img{height:80px}.footer-grid h4{color:#f0f2f3}.footer-grid p{color:#c0c9cf;text-shadow:0 1px 5px #0007}.footer-grid>div>a:not(.logo):not(.social){color:#b8c3cb}.footer-grid>div>a:not(.logo):not(.social):hover{color:var(--accent)}.footer-grid .social{color:#e1e5e8;border-color:#ffffff35;background:#0e151a70}.footer-bottom{color:#98a5af;border-top-color:#ffffff20}.footer-bottom>span:last-child{color:#aeb9c1}
@media(max-width:991px){footer:after{background:linear-gradient(90deg,transparent 0%,#10161b35 17%,#10161bdf 44%,#10161bf0 100%),linear-gradient(180deg,transparent 0%,transparent 21%,#10161b88 31%,#10161be8 44%,#10161bf5 100%)}}
@media(max-width:575px){footer{padding-top:35px}footer:before{background-position:32% top}footer:after{background:linear-gradient(90deg,transparent,#10161b45 55%,#10161b99),linear-gradient(180deg,transparent 0,transparent 80px,#10161b30 125px,#10161bd9 185px,#10161bf5 290px,#10161bf5 100%)}.footer-grid .logo{width:170px;margin-bottom:35px}.footer-grid .logo img{height:78px}.footer-grid>div:first-child p{color:#d8dfe3}.footer-grid>div:first-child{padding-bottom:6px}}
/* Footer follows the approved hero photography and contrast structure. */
footer{background:#11171b;padding-top:34px;border-top:1px solid #ffffff12}footer:before{background:url('assets/slide-sprinklers.webp') center top/cover no-repeat;opacity:1}footer:after{background:linear-gradient(180deg,transparent 0,transparent 125px,#0b121780 185px,#0b1217d9 250px,#0b1217ed 100%)}.footer-brand-row{display:flex;align-items:center;justify-content:space-between;gap:35px;padding:0 0 58px;min-height:150px}.footer-brand-row .logo{width:185px;flex-shrink:0;background:none;box-shadow:none;padding:0}.footer-brand-row .logo img{height:88px;filter:none!important}.footer-brand-row .logo:before{display:none!important}.footer-invitation{margin-right:auto}.footer-invitation>span{font:8px var(--mono);letter-spacing:1.7px;color:#97222a;display:block;margin-bottom:9px}.footer-invitation h3{font-size:23px;font-weight:700;color:#20272c;max-width:430px;line-height:1.25;letter-spacing:-.7px}.footer-brand-row>.btn{font-size:9px;padding:13px 18px;flex-shrink:0}.footer-grid{padding-top:32px;gap:50px}.footer-grid h4{color:#f3f5f6;margin-top:0}.footer-grid p{color:#c0cad1;text-shadow:0 1px 6px #0009}.footer-grid>div>a:not(.social){color:#bdc8d0}.footer-bottom{margin-top:35px;color:#9fadb8;border-color:#ffffff20}.footer-bottom>span:last-child{color:#aebbc5}
/* Restrained technical pipework motif in the services section. */
.delta-services{overflow:hidden}.delta-services:after{content:'';position:absolute;right:-30px;top:-15px;bottom:-30px;width:500px;background:url('assets/pipe-pattern.svg') right center/contain no-repeat;opacity:.16;pointer-events:none;z-index:0}.delta-services .blueprint{display:none}.delta-services>.container{position:relative;z-index:1}.delta-service-grid article{background:linear-gradient(90deg,#0e0f10a6,#0e0f1040)}
@media(max-width:991px){.footer-brand-row{gap:25px;padding-bottom:55px}.footer-brand-row .logo{width:155px}.footer-brand-row .logo img{height:78px}.footer-invitation h3{font-size:20px;max-width:320px}.footer-brand-row>.btn{font-size:8px;padding:12px 14px}.footer-grid{gap:30px}.delta-services:after{width:380px;opacity:.13}}
@media(max-width:575px){footer{padding-top:28px}footer:before{background-position:30% top}footer:after{background:linear-gradient(180deg,transparent 0,transparent 110px,#0b1217b3 190px,#0b1217ed 260px,#0b1217f5 100%)}.footer-brand-row{min-height:0;display:grid;grid-template-columns:1fr auto;gap:22px 15px;padding-bottom:32px}.footer-brand-row .logo{width:150px;grid-column:1}.footer-brand-row .logo img{height:72px}.footer-brand-row>.btn{grid-column:2;grid-row:1;font-size:8px;padding:12px 14px;gap:10px}.footer-invitation{grid-column:1/-1;margin:0}.footer-invitation>span{font-size:7px;color:#ee7979;margin-bottom:10px}.footer-invitation h3{font-size:23px;max-width:310px;color:#f0f3f5;line-height:1.3;letter-spacing:-.6px}.footer-grid{padding-top:28px;gap:30px 25px}.footer-grid>div:first-child{padding-bottom:0}.footer-grid h4{margin:0 0 20px}.footer-grid>div:last-child h4{margin:0 0 20px!important}.footer-bottom{margin-top:25px}.delta-services:after{right:-100px;top:20px;width:330px;opacity:.13}.delta-service-grid article{background:none}}