/* Gasonic's existing brand palette. Shared by every HTML page. */
:root{--navy:#002d6d;--blue:#006ac1;--red:#d6081b;--ink:#152e4e;--muted:#51647a;--pale:#f2f6fa;--line:#dbe4ee;--white:#fff;--max:1240px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;color:var(--ink);background:#fff;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.65}a{color:inherit;text-underline-offset:4px}img{max-width:100%;display:block}button,input,select,textarea{font:inherit}button,a,input,select,textarea{ -webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}.wrap{width:min(var(--max),calc(100% - 96px));margin-inline:auto}.skip{position:fixed;top:-100px;left:16px;padding:12px 20px;background:white;z-index:100}.skip:focus{top:8px}.topline{background:var(--navy);color:white;font-size:13px;letter-spacing:.025em}.topline .wrap{min-height:37px;display:flex;align-items:center;justify-content:space-between;gap:20px}.topline a{text-decoration:none}.top-contact{display:flex;gap:25px}.site-header{position:sticky;top:0;z-index:30;background:#fffffff5;backdrop-filter:blur(15px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:93px;gap:35px}.brand{flex:none;display:block}.brand img{width:184px;height:auto}.nav{display:flex;gap:27px;align-items:center}.nav>a{font-size:14px;font-weight:600;text-decoration:none;position:relative}.nav>a:not(.button):after{content:'';position:absolute;bottom:-12px;left:0;right:0;height:2px;background:var(--red);transform:scaleX(0);transition:transform .2s}.nav>a:hover:after,.nav>a[aria-current=page]:after{transform:scaleX(1)}.button{display:inline-flex;justify-content:center;align-items:center;gap:24px;min-height:50px;padding:13px 23px;border:1px solid transparent;border-radius:3px;background:var(--red);color:white;font-size:14px;font-weight:700;line-height:1.45;text-decoration:none;cursor:pointer;transition:background .2s,transform .2s}.button:hover{background:#b10717;transform:translateY(-2px)}.button.blue{background:var(--navy)}.button.blue:hover{background:var(--blue)}.button.outline{background:transparent;border-color:#ffffff65;color:white}.button.outline:hover{background:#ffffff12}.button.light{background:#fff;color:var(--navy)}.button.small{min-height:45px;padding:11px 17px}.arrow{font-size:21px;line-height:1;font-weight:400}.menu-toggle{display:none;background:none;border:1px solid var(--line);padding:10px 14px;color:var(--navy);border-radius:3px}.eyebrow{display:flex;align-items:center;gap:12px;font-size:12px;letter-spacing:.16em;font-weight:700;text-transform:uppercase;color:var(--blue);margin:0 0 22px}.eyebrow:before{content:'';height:2px;width:27px;flex:none;background:var(--red)}h1,h2,h3,h4,p{margin-top:0}h1,h2,h3,h4{line-height:1.13;letter-spacing:-.035em;color:var(--navy)}h1{font-size:clamp(40px,4.5vw,65px);font-weight:700}h2{font-size:clamp(30px,3vw,43px);margin-bottom:22px}h3{font-size:25px;margin-bottom:17px}p{margin-bottom:22px}.lead{font-size:19px;line-height:1.65;color:var(--muted)}.hero{position:relative;isolation:isolate;background:var(--navy);color:white;overflow:hidden;min-height:565px}.hero-photo{position:absolute;inset:0;z-index:-2;background:url('images/london-skyline.webp') center 46%/cover}.hero:after{content:'';position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(0,33,78,.96) 0%,rgba(0,39,90,.86) 39%,rgba(0,35,81,.32) 75%,rgba(0,35,81,.14))}.hero .wrap{padding-block:75px 70px;position:relative}.hero-copy{max-width:690px}.hero h1{color:white;margin-bottom:23px;max-width:700px}.hero h1 span{color:#80c6ff}.hero .eyebrow{color:#c5dff6}.hero .lead{max-width:570px;color:#e0eaf5;font-size:18px;margin-bottom:30px}.actions{display:flex;gap:13px;align-items:center;flex-wrap:wrap}.hero-note{position:absolute;right:0;bottom:48px;border-left:2px solid var(--red);padding:3px 0 3px 18px;max-width:215px;font-size:13px;line-height:1.5;color:#eef5ff}.hero-note strong{display:block;font-size:15px;color:#fff}.trustbar{border-bottom:1px solid var(--line)}.trust-items{display:grid;grid-template-columns:repeat(4,1fr);min-height:100px;align-items:center}.trust-item{display:flex;gap:14px;align-items:center;justify-content:center;border-right:1px solid var(--line);padding:5px 15px}.trust-item:first-child{justify-content:flex-start;padding-left:0}.trust-item:last-child{border:0}.trust-item svg{width:26px;height:26px;stroke:var(--blue);flex:none;fill:none;stroke-width:1.5}.trust-item strong{display:block;font-size:14px;line-height:1.4;color:var(--navy)}.trust-item span{font-size:12px;color:var(--muted)}.section{padding-block:85px}.pale{background:var(--pale)}.section-heading{display:flex;justify-content:space-between;gap:60px;align-items:flex-end;margin-bottom:35px}.section-heading h2{margin-bottom:0;max-width:590px}.section-heading>p{max-width:390px;margin:0;color:var(--muted)}.section-heading .eyebrow{margin-bottom:16px}.text-link{font-size:14px;font-weight:700;display:inline-flex;gap:25px;align-items:center;color:var(--navy);text-decoration:none;border-bottom:1px solid var(--navy);padding-bottom:6px}.text-link:hover{color:var(--blue)}.services-pair{display:grid;grid-template-columns:1fr 1fr;gap:24px}.service-panel{position:relative;padding:39px;background:#fff;border:1px solid var(--line);border-top:3px solid var(--blue)}.service-panel.commercial{background:var(--navy);color:#dfeafa;border:0;border-top:3px solid var(--red)}.service-panel h3{font-size:31px}.service-panel.commercial h3,.service-panel.commercial .text-link{color:white;border-color:white}.service-panel p{max-width:450px}.service-panel .panel-icon{width:47px;height:47px;color:var(--blue);margin-bottom:25px}.service-panel.commercial .panel-icon{color:#87caff}.panel-icon svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.2}.checks{padding:0;list-style:none;display:grid;gap:9px;margin:24px 0 30px}.checks li{padding-left:24px;position:relative;font-size:15px}.checks li:before{content:'✓';position:absolute;left:0;color:var(--blue)}.commercial .checks li:before{color:#80c6ff}.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.project-card{display:block;text-decoration:none;border-bottom:1px solid var(--line);padding-bottom:24px}.project-card .project-visual{position:relative;overflow:hidden;height:240px;background:#e8eef5;margin-bottom:22px}.project-card h3{font-size:23px;line-height:1.2;margin-bottom:12px}.project-card p{font-size:15px;color:var(--muted);margin-bottom:18px}.meta{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);margin-bottom:12px}.project-card .text-link{border:0;font-size:13px}.project-card:hover .project-visual img{filter:brightness(1.07)}.source-crop{position:relative;overflow:hidden;aspect-ratio:var(--cw)/var(--ch);width:100%;background:#edf2f8}.source-crop img{position:absolute;width:calc(100% * 1024 / var(--cw));height:calc(100% * 1536 / var(--ch));max-width:none;left:calc(-100% * var(--cx) / var(--cw));top:calc(-100% * var(--cy) / var(--ch));object-fit:fill}.project-visual .source-crop{min-height:100%}.project-visual.domestic .source-crop{width:100%;height:100%}.project-visual.kent .source-crop{width:100%;height:140%;top:-20%}.project-visual.water .source-crop{width:100%;height:100%}.split{display:grid;grid-template-columns:1fr 1fr;gap:85px;align-items:center}.about-block{background:var(--navy);color:#d9e6f5;padding:46px;border-radius:2px}.about-block .eyebrow{color:#a1d2ff}.about-block h2{color:white}.big-number{font-size:90px;font-weight:700;line-height:1;letter-spacing:-.08em;color:white;margin:25px 0 7px}.big-number span{font-size:55px;color:#77c3ff}.about-block hr{border:0;border-top:1px solid #ffffff30;margin:28px 0}.about-block .stat-row{display:flex;justify-content:space-between;font-size:14px}.process{display:grid;grid-template-columns:repeat(5,1fr);gap:25px;padding:0;list-style:none;margin:42px 0 0}.process .step{display:block;color:var(--blue);font-size:14px;font-weight:700;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:20px}.process h3{font-size:20px;letter-spacing:-.02em}.process p{font-size:14px;color:var(--muted);margin:0}.sector-list{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.sector-list a{padding:27px 20px;border-right:1px solid var(--line);text-align:center;font-size:14px;line-height:1.4;font-weight:700;text-decoration:none}.sector-list a:last-child{border:0}.sector-list a:hover{background:#fff;color:var(--blue)}.cta{background:var(--navy);color:white;padding-block:58px;position:relative}.cta:before{content:'';position:absolute;inset:0 auto 0 0;width:6px;background:var(--red)}.cta .wrap{display:flex;justify-content:space-between;gap:45px;align-items:center}.cta h2{font-size:37px;color:white;margin-bottom:12px}.cta p{margin:0;color:#d0e0f3}.site-footer{padding:55px 0 24px;background:#f8fafc}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.25fr;gap:50px}.footer-brand{width:175px;margin-bottom:17px}.site-footer p{font-size:14px;color:var(--muted);max-width:240px}.site-footer h3{font-size:14px;letter-spacing:0;margin:8px 0 20px}.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:9px}.footer-links a{font-size:13px;text-decoration:none;color:var(--muted)}.footer-links a:hover{text-decoration:underline;color:var(--navy)}.footer-bottom{border-top:1px solid var(--line);margin-top:40px;padding-top:22px;display:flex;justify-content:space-between;gap:25px;color:var(--muted);font-size:12px}.footer-bottom a{margin-left:18px}.page-hero{background:var(--navy);color:#dce8f6;padding:38px 0 64px}.breadcrumbs{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:12px;margin-bottom:37px;opacity:.85}.breadcrumbs a{text-decoration:none}.page-hero .eyebrow{color:#a4d2fa}.page-hero h1{color:white;max-width:900px;font-size:clamp(39px,4.3vw,60px);margin-bottom:22px}.page-hero .lead{color:#dce8f6;max-width:730px;margin-bottom:0}.page-hero .actions{margin-top:28px}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:65px}.body-copy{max-width:770px}.body-copy p{color:var(--muted)}.body-copy h2{font-size:34px;margin-top:45px}.body-copy h2:first-child{margin-top:0}.body-copy h3{font-size:23px;margin-top:30px}.sidebar{align-self:start;padding:30px;background:var(--pale);border-top:3px solid var(--red)}.sidebar h2,.sidebar h3{font-size:23px}.sidebar p{font-size:14px;color:var(--muted)}.sidebar .button{width:100%;font-size:13px}.service-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.service-card{border:1px solid var(--line);padding:29px}.service-card h3{font-size:23px;margin:0 0 18px}.service-card p{font-size:15px;color:var(--muted)}.service-number{font-size:12px;letter-spacing:.1em;color:var(--blue);display:block;margin-bottom:18px}.service-card .checks{margin-bottom:0}.faq{margin-top:35px}.faq details{border-bottom:1px solid var(--line);padding:21px 0}.faq summary{font-weight:700;color:var(--navy);cursor:pointer;padding-right:15px}.faq details p{margin:16px 0 0;color:var(--muted);font-size:15px}.project-details{display:grid;gap:18px;margin:0}.project-details div{padding-bottom:15px;border-bottom:1px solid var(--line)}.project-details dt{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--blue);margin-bottom:6px}.project-details dd{margin:0;font-size:15px}.case-figure{margin:0 0 40px;max-width:770px}.case-figure figcaption{font-size:12px;color:var(--muted);margin-top:10px}.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}.case-grid .project-visual{height:300px}.highlight{padding:30px;border-left:3px solid var(--blue);background:var(--pale);margin-block:35px}.highlight p:last-child{margin:0}.values{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:35px}.values>div{border-top:2px solid var(--blue);padding-top:25px}.values h3{font-size:23px}.values p{font-size:15px;color:var(--muted)}.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:80px}.contact-options{display:grid;gap:25px}.contact-option{border-bottom:1px solid var(--line);padding-bottom:24px}.contact-option span{display:block;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}.contact-option a{font-size:25px;font-weight:700;color:var(--navy);text-decoration:none;overflow-wrap:anywhere}.contact-option a.email{font-size:20px}.enquiry{background:var(--pale);padding:35px}.enquiry h2{font-size:29px}.enquiry label{display:block;font-weight:700;font-size:13px;margin-bottom:7px}.enquiry input,.enquiry select,.enquiry textarea{width:100%;border:1px solid #c5d0dd;background:white;border-radius:2px;min-height:46px;padding:10px 12px;color:var(--ink)}.form-pair{display:grid;grid-template-columns:1fr 1fr;gap:17px}.field{margin-bottom:17px}.enquiry textarea{resize:vertical;min-height:130px}.fineprint{font-size:13px!important;color:var(--muted)}.notice{font-size:14px;padding:15px;background:#e5edf6;margin-top:18px}.hidden{display:none!important}.quote{border-top:3px solid var(--blue);padding:30px;background:var(--pale);margin:0}.quote blockquote{margin:0 0 20px;font-size:18px}.quote cite{font-size:13px;font-style:normal;color:var(--muted)}.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.notfound{text-align:center;padding:100px 24px}.notfound h1{font-size:90px}.nav-fallback{display:none}
.hero-photo{background-image:url('images/london-skyline.webp');background-position:center 58%}
.footer-brand{height:auto}
.meta,.eyebrow{font-size:12px}
.project-card,.service-panel,.service-card,.split>*,.footer-grid>*{min-width:0}
.project-card .project-visual .source-crop{position:absolute;aspect-ratio:var(--cw)/var(--ch);height:auto;width:100%;min-height:100%;top:50%;transform:translateY(-50%)}
.case-figure{max-width:620px}
.project-photo{display:block;width:100%;height:auto}
.project-visual>.project-photo{width:100%;height:100%;object-fit:cover;object-position:center 42%}
.project-visual.kent>.project-photo{object-position:center 33%}
.feature-photo>.project-photo{max-height:540px;object-fit:contain;background:var(--pale)}
.case-photo-grid,.commercial-photo-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.case-photo-grid{margin-bottom:40px}
.case-photo-grid figure,.commercial-photo-grid figure{margin:0;min-width:0}
.case-photo-grid figcaption,.commercial-photo-grid figcaption{margin-top:12px;color:var(--muted);font-size:14px;line-height:1.5}
.commercial-photo-grid{max-width:1040px;margin-top:30px;gap:32px}
@media(max-width:650px){.case-photo-grid,.commercial-photo-grid{grid-template-columns:1fr;gap:28px}.feature-photo>.project-photo{max-height:none}}
.footer-links a{font-size:14px}.trust-item span{font-size:13px}.service-number,.project-details dt{font-size:12px}
@media(min-width:1450px){.hero{min-height:610px}.hero .wrap{padding-top:92px}}
@media(max-width:1150px){.wrap{width:calc(100% - 64px)}.nav{gap:17px}.nav>a{font-size:13px}.brand img{width:160px}.header-inner{gap:20px}.hero-note{display:none}.hero-copy{max-width:650px}.footer-grid{gap:28px}.content-grid{gap:35px;grid-template-columns:minmax(0,1fr) 270px}}
@media(max-width:930px){.menu-toggle{display:block}.header-inner{min-height:78px}.nav{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;box-shadow:0 12px 20px #002d6d12;padding:25px 32px;align-items:stretch}.nav.open{display:flex;flex-direction:column;gap:0}.nav a{padding:12px 0;font-size:16px}.nav a.button{margin-top:12px}.nav>a:after{display:none}.nav>a[aria-current=page]{color:var(--blue)}.hero{min-height:530px}.hero:after{background:linear-gradient(90deg,#00214ef5,#00275ac9 70%,#00275a80)}.trust-items{grid-template-columns:repeat(2,1fr);padding-block:15px;gap:20px}.trust-item,.trust-item:first-child{justify-content:flex-start;padding-left:0}.trust-item:nth-child(2){border:0}.project-grid{gap:20px}.project-card .project-visual{height:200px}.split{gap:40px}.footer-grid{grid-template-columns:1fr 1fr;gap:35px}.content-grid{grid-template-columns:1fr}.sidebar{max-width:none}.contact-grid{gap:35px}.top-contact a:first-child{display:none}.sector-list{grid-template-columns:repeat(3,1fr)}.sector-list a{border-bottom:1px solid var(--line)}.process{gap:18px}.process h3{font-size:18px}.cta h2{font-size:32px}}
@media(max-width:650px){.wrap{width:calc(100% - 40px)}.topline .wrap{min-height:33px;font-size:11px;gap:12px}.top-contact{gap:0}.brand img{width:155px}.hero{min-height:0}.hero .wrap{padding-block:49px 54px}.hero h1{font-size:42px;line-height:1.1;letter-spacing:-.045em}.hero .lead{font-size:16px}.eyebrow{font-size:10px;letter-spacing:.12em;margin-bottom:22px}.hero-photo{background-position:65% center}.hero:after{background:#002956df}.button{padding:13px 18px;gap:16px;font-size:13px}.hero .actions .button{flex:1}.trust-items{gap:20px 12px;padding-block:24px}.trust-item{gap:9px;border:0}.trust-item svg{width:23px;height:23px}.trust-item strong{font-size:12px}.trust-item span{font-size:11px}.section{padding-block:55px}.section-heading{display:block;margin-bottom:28px}.section-heading>p,.section-heading>.text-link{margin-top:22px}.section-heading h2{font-size:32px}.services-pair,.project-grid,.split,.service-grid,.case-grid,.contact-grid,.quote-grid,.values{grid-template-columns:1fr}.service-panel{padding:28px}.service-panel h3{font-size:28px}.project-grid{gap:30px}.project-card .project-visual{height:270px}.project-card h3{font-size:25px}.about-block{padding:32px}.big-number{font-size:80px}.split{gap:32px}.process{grid-template-columns:1fr;gap:22px;margin-top:30px}.process li{display:grid;grid-template-columns:38px 1fr;gap:0 15px}.process .step{grid-row:1/3;border:0;padding:3px 0;margin:0}.process h3{font-size:22px;margin-bottom:8px}.process p{grid-column:2}.sector-list{grid-template-columns:1fr 1fr}.sector-list a{font-size:13px;padding:22px 12px}.sector-list a:last-child{grid-column:1/-1}.cta .wrap{display:block}.cta h2{font-size:31px}.cta .actions{margin-top:27px}.footer-grid{gap:30px 20px}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid>div:last-child{grid-column:1/-1}.footer-bottom{display:block;font-size:11px}.footer-bottom>div{margin-top:12px}.footer-bottom a{margin:0 18px 0 0}.page-hero{padding:25px 0 45px}.page-hero h1{font-size:40px}.page-hero .lead{font-size:17px}.breadcrumbs{margin-bottom:30px;font-size:11px}.body-copy h2{font-size:29px}.service-card{padding:25px}.enquiry{padding:24px}.form-pair{grid-template-columns:1fr;gap:0}.contact-option a{font-size:25px}.case-grid .project-visual{height:270px}.values{gap:15px}.page-hero .eyebrow{font-size:10px}.topline a{white-space:nowrap}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media(max-width:650px){.eyebrow,.page-hero .eyebrow,.meta{font-size:12px}.trust-item span{font-size:12px}.hero h1{font-size:clamp(29px,8.5vw,37px)}.hero h1 br{display:initial}.hero h1 span{display:inline}.topline .wrap{font-size:12px}.topline .wrap>span{max-width:215px}.about-block .stat-row{flex-wrap:wrap;gap:8px}.nav.open{max-height:calc(100dvh - 90px);overflow-y:auto}}
@media print{.topline,.site-header,.site-footer,.cta,.menu-toggle,.actions{display:none}body{color:#000}.wrap{width:100%}.section{padding:24px 0}.page-hero{background:#fff;color:#000}.page-hero h1,.page-hero .lead{color:#000}a{text-decoration:none}.content-grid{grid-template-columns:1fr}.source-crop{max-width:500px}.sidebar{break-inside:avoid}}