:root{--blue:#106eae;--blue-dark:#075285;--red:#e50920;--ink:#152936;--muted:#566775;--line:#dce5eb;--pale:#f2f7fa;--white:#fff;--radius:18px;--shadow:0 18px 50px rgba(15,44,63,.10);font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:#fff;font-synthesis:none;-webkit-text-size-adjust:100%}
*{box-sizing:border-box}body{margin:0}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}::selection{background:#d3eaff;color:var(--ink)}[hidden]{display:none!important}.container{width:min(1220px,calc(100% - 88px));margin-inline:auto}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(2.8rem,5.1vw,4.8rem);font-weight:700;line-height:1.04;letter-spacing:-.055em;margin-bottom:26px}h2{font-size:clamp(2rem,3.5vw,3.25rem);line-height:1.1;letter-spacing:-.04em;margin-bottom:22px}h3{font-size:1.35rem;line-height:1.25;letter-spacing:-.025em;margin-bottom:12px}p,li{font-size:1rem;line-height:1.75}p{margin-bottom:20px}p:last-child{margin-bottom:0}.lead{font-size:1.16rem;line-height:1.7;color:var(--muted);max-width:620px}.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.72rem;font-weight:700;line-height:1.4;color:var(--blue);margin-bottom:22px;display:flex;align-items:center;gap:12px}.eyebrow:before{content:"";width:30px;height:2px;background:var(--red);flex-shrink:0}.section{padding-block:100px}.section--tint{background:var(--pale)}.section--dark{background:var(--ink);color:#fff}.section--dark .eyebrow{color:#b9dff7}.section--dark .lead{color:#d0dde5}.section-heading{display:flex;justify-content:space-between;gap:50px;align-items:end;margin-bottom:42px}.section-heading>div{max-width:700px}.section-heading h2{margin-bottom:12px}.section-heading p{max-width:540px;color:var(--muted)}.section-heading .text-link{flex-shrink:0;margin-bottom:8px}.stack>*+*{margin-top:24px}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}.button{min-height:54px;display:inline-flex;justify-content:center;align-items:center;gap:16px;padding:15px 25px;border:1px solid transparent;border-radius:7px;font-size:.9rem;font-weight:700;line-height:1.4;transition:background .2s,transform .2s,color .2s;white-space:normal;text-align:center}.button svg{width:18px;height:18px}.button--primary{background:var(--blue);color:#fff}.button--primary:hover{background:var(--blue-dark);transform:translateY(-2px)}.button--secondary,.button--outline{border-color:#bbcbd6;color:var(--ink);background:transparent}.button--secondary:hover,.button--outline:hover{background:var(--pale)}.button--light{background:white;color:var(--ink)}.button--light:hover{background:#e1f0f9}.text-link{color:var(--blue);font-size:.92rem;font-weight:700;display:inline-flex;align-items:center;gap:10px;text-underline-offset:5px}.text-link:after{content:"\2192";font-size:1.25rem}.text-link:hover{text-decoration:underline}.skip-link{position:fixed;top:10px;left:10px;z-index:300;background:var(--ink);color:white;padding:14px 20px;transform:translateY(-160%);border-radius:6px}.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:0;z-index:70;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.header-inner{height:94px;display:flex;align-items:center;gap:30px;justify-content:space-between}.site-logo{width:252px;display:block;flex-shrink:0}.desktop-nav{display:flex;gap:25px;align-items:center;margin-left:auto}.nav-link{font-size:.86rem;font-weight:700;padding:14px 0;position:relative}.nav-link[aria-current=page]{color:var(--blue)}.nav-link[aria-current=page]:after{content:"";position:absolute;left:0;bottom:3px;width:22px;height:2px;background:var(--red)}.nav-link:hover{color:var(--blue)}.header-contact{font-size:.86rem;font-weight:700;padding-left:25px;border-left:1px solid var(--line);display:flex;gap:8px;align-items:center;white-space:nowrap}.header-contact svg{width:16px;height:16px;color:var(--blue)}.menu-toggle{display:none;width:46px;height:46px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;background:white;color:var(--ink)}.menu-toggle svg{width:22px;height:22px}.mobile-menu{padding:6px 24px 24px;border-top:1px solid var(--line);background:white}.mobile-menu a{display:block;padding:15px 10px;border-bottom:1px solid var(--line);font-size:1rem}.mobile-menu a[aria-current=page]{color:var(--blue)}.mobile-actions{display:none}
.hero{padding-block:55px 60px;position:relative;overflow:hidden;background:linear-gradient(110deg,#fff 0%,#fff 58%,#f2f7fa 58%)}.hero__inner{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:58px}.hero__copy{padding-block:30px}.hero__copy h1{max-width:640px}.hero__copy .lead{max-width:490px;font-size:1.06rem}.hero__media{position:relative;margin:0;min-width:0}.hero__image{width:100%;aspect-ratio:1.13;object-fit:cover;border-radius:20px 20px 20px 3px}.hero__note{position:absolute;bottom:24px;left:-26px;display:flex;align-items:center;gap:16px;padding:20px 24px;background:white;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);max-width:95%;font-size:.88rem;line-height:1.4}.hero__note img{width:53px;height:48px;object-fit:contain;flex-shrink:0}.hero__note strong{display:block;margin-bottom:4px}.hero__note span{color:var(--muted)}.hero__note p{font-size:.88rem;line-height:1.4;margin:0}.hero-trust{display:flex;align-items:center;gap:12px;margin-top:30px;font-size:.84rem;color:var(--muted)}.hero-trust svg{width:18px;height:18px;color:var(--blue)}.proof-strip{background:var(--ink);color:white}.proof-strip>.container{display:grid;grid-template-columns:repeat(3,1fr)}.proof-strip__item{padding:31px 28px;display:flex;gap:15px;align-items:center;border-right:1px solid #ffffff25}.proof-strip__item:first-child{padding-left:0}.proof-strip__item:last-child{border-right:0}.proof-strip__item strong{font-size:1.08rem;line-height:1.35;display:block}.proof-strip__item span,.proof-strip__item p{font-size:.82rem;line-height:1.5;color:#c4d3dc;margin:5px 0 0}.proof-strip__item svg{width:25px;height:25px;color:#8ccef7;flex-shrink:0}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.service-card{border:1px solid var(--line);background:white;border-radius:12px;overflow:hidden;min-width:0;transition:transform .2s,box-shadow .2s}.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.service-card__image{width:100%;height:235px;object-fit:cover}.service-card__body{padding:28px}.service-card__body p{font-size:.94rem;color:var(--muted)}.service-card__number{font-size:.72rem;letter-spacing:.12em;color:var(--blue);font-weight:700;display:block;margin-bottom:16px}.split{display:grid;grid-template-columns:1fr 1fr;gap:88px;align-items:center}.split__copy p{color:var(--muted)}.split__media{position:relative;min-width:0}.split__media img,.image-frame img{width:100%;aspect-ratio:1.05;object-fit:cover;border-radius:14px}.split__media--portrait img{aspect-ratio:3/4}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:35px}.feature{border-top:2px solid var(--blue);padding-top:22px}.feature p{color:var(--muted);font-size:.94rem}.feature svg{width:26px;height:26px;color:var(--blue);margin-bottom:18px}.brand-list{display:flex;flex-wrap:wrap;gap:22px 40px;margin-block:28px;align-items:center;padding:25px 0;border-block:1px solid var(--line);list-style:none}.brand-list li{font-weight:700;font-size:1.18rem;letter-spacing:-.03em}.list-check{list-style:none;padding:0;margin:25px 0}.list-check li{position:relative;padding:10px 0 10px 28px;border-bottom:1px solid var(--line);font-size:.95rem}.list-check li:before{content:"\2713";position:absolute;left:0;top:10px;color:var(--blue);font-weight:700}.callout{border-radius:12px;background:var(--pale);padding:30px;border-left:3px solid var(--blue);margin-block:28px}.callout p{font-size:.94rem}.mini-gallery{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px}.mini-gallery img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:10px}.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:50px}.cta-inner>div:first-child{max-width:690px}.cta-inner h2{margin-bottom:15px}.cta-inner .button-row{flex-shrink:0;margin:0}.cta-inner .lead{color:#d0dde5}.page-intro{padding-block:67px 62px;background:var(--pale);border-bottom:1px solid var(--line)}.page-intro h1{font-size:clamp(2.75rem,4.5vw,4rem);max-width:850px}.page-intro .lead{max-width:710px}.page-intro .eyebrow{margin-bottom:20px}.service-section{display:grid;grid-template-columns:1.2fr 1fr;gap:80px;align-items:start;padding-block:80px;border-bottom:1px solid var(--line);scroll-margin-top:115px}.service-section:first-child{padding-top:0}.service-section:last-child{padding-bottom:0;border:0}.service-section__body p{color:var(--muted)}.service-section__image{position:sticky;top:125px;min-width:0}.service-section__image img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:14px}.service-list{padding-left:20px;columns:2;column-gap:30px;margin-block:20px}.service-list li{padding-block:5px;font-size:.94rem;break-inside:avoid}.service-list li::marker{color:var(--blue)}.faq-list{max-width:880px;margin-inline:auto}.faq-item{border-bottom:1px solid var(--line);padding:0}.faq-item:first-child{border-top:1px solid var(--line)}.faq-item summary{padding:26px 52px 26px 0;cursor:pointer;font-size:1.16rem;font-weight:700;line-height:1.5;list-style:none;position:relative}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";position:absolute;right:4px;top:23px;font-size:1.55rem;line-height:1.5;color:var(--blue);font-weight:400}.faq-item[open] summary:after{content:"\2212"}.faq-answer{padding-bottom:26px;max-width:750px;color:var(--muted)}.faq-answer p{line-height:1.75}.faq-answer ul{padding-left:20px}
.contact-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:75px;align-items:start}.contact-details>p{color:var(--muted)}.contact-detail{padding-block:25px;border-bottom:1px solid var(--line)}.contact-detail h3{font-size:.74rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}.contact-detail a{font-size:1.22rem;font-weight:700;line-height:1.5;overflow-wrap:anywhere}.contact-detail address{font-style:normal;font-size:1.05rem;line-height:1.7}.contact-detail p{line-height:1.6;margin:0}.contact-detail svg{width:20px;height:20px;color:var(--blue)}.enquiry-form{padding:36px;background:var(--pale);border:1px solid var(--line);border-radius:14px}.enquiry-form>p{font-size:.93rem;color:var(--muted)}.field{margin-bottom:23px;min-width:0}.field label{display:block;font-size:.88rem;font-weight:700;margin-bottom:9px}.field label span{font-weight:400;color:var(--muted)}.field input,.field select,.field textarea{display:block;width:100%;padding:14px 15px;border:1px solid #b7c8d3;border-radius:6px;background:#fff;color:var(--ink);font-size:1rem;line-height:1.4;min-height:50px}.field textarea{resize:vertical;min-height:145px}.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--blue)}.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--blue);outline-offset:2px}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}.form-note{font-size:.78rem!important;line-height:1.6!important;margin:20px 0 0!important;color:var(--muted)}.form-note a{text-decoration:underline;text-underline-offset:3px}.form-status{padding:18px 20px;border-radius:8px;background:#e5f2eb;border:1px solid #b3d4c0;margin-top:20px;font-size:.95rem;line-height:1.65}.form-status[data-state=error]{background:#fff0f0;border-color:#ebc1c6}.enquiry-form button[disabled]{opacity:.65;cursor:wait;transform:none}.honeypot{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}.gallery-grid{columns:3;column-gap:22px}.gallery-item{display:block;break-inside:avoid;margin-bottom:22px;overflow:hidden;border-radius:10px;position:relative;background:var(--pale)}.gallery-item img{width:100%;height:auto;transition:transform .3s}.gallery-item:after{content:"+";position:absolute;right:14px;bottom:14px;width:34px;height:34px;background:rgba(255,255,255,.94);color:var(--ink);border-radius:50%;display:grid;place-items:center;font-size:1.3rem;box-shadow:0 4px 12px #0001}.gallery-item:hover img{transform:scale(1.025)}.gallery-dialog{border:0;border-radius:0;padding:0;background:transparent;width:100vw;height:100dvh;max-width:none;max-height:none;color:white;overflow:hidden;inset:0;margin:0}.gallery-dialog::backdrop{background:rgba(10,19,26,.96)}.gallery-dialog[open]{display:grid;place-items:center}.gallery-dialog img{max-width:calc(100vw - 160px);max-height:calc(100dvh - 90px);object-fit:contain;width:auto;height:auto}.gallery-dialog button{position:absolute;z-index:3;border:1px solid #ffffff3a;color:white;background:#ffffff15;border-radius:50%;width:48px;height:48px;display:grid;place-items:center;font-size:1.5rem}.gallery-dialog button:hover{background:#ffffff30}.gallery-dialog button svg{width:22px;height:22px}.gallery-close{top:20px;right:24px}.gallery-prev{left:22px;top:calc(50% - 24px)}.gallery-next{right:22px;top:calc(50% - 24px)}body.dialog-open{overflow:hidden}.legal-layout{display:grid;grid-template-columns:230px 1fr;gap:70px;align-items:start}.legal-nav{position:sticky;top:125px;display:flex;flex-direction:column;border-top:1px solid var(--line)}.legal-nav a{font-size:.9rem;padding:14px 0;border-bottom:1px solid var(--line);line-height:1.5}.legal-nav a:hover{color:var(--blue)}.legal-content{max-width:790px}.legal-content section,.legal-content h2{scroll-margin-top:125px}.legal-content h2{font-size:1.55rem;margin-top:42px;line-height:1.3}.legal-content h2:first-child{margin-top:0}.legal-content h3{font-size:1.1rem;margin-top:25px}.legal-content p,.legal-content li{color:var(--muted);font-size:.96rem}.legal-content a{color:var(--blue);text-decoration:underline;text-underline-offset:4px;overflow-wrap:anywhere}.legal-content ul{padding-left:22px}.legal-content address{font-style:normal;line-height:1.7;color:var(--muted)}
.site-footer{background:#eef3f6;border-top:1px solid var(--line);padding-top:62px}.footer-grid{display:grid;grid-template-columns:1.35fr .7fr 1fr;gap:80px;padding-bottom:45px}.footer-brand img:first-child{width:250px;margin-bottom:22px}.footer-brand p{color:var(--muted);max-width:300px;font-size:.88rem;line-height:1.7}.footer-brand .gas-safe-logo,.footer-brand img[src*=gas-safe]{width:68px;height:auto;margin:24px 0 0}.footer-links h2,.footer-contact h2{font-size:.78rem;text-transform:uppercase;letter-spacing:.13em;margin-bottom:22px}.footer-links a{display:block;font-size:.9rem;padding-bottom:13px;color:var(--muted)}.footer-links a:hover{color:var(--blue)}.footer-contact a{display:block;color:var(--ink);font-size:.98rem;margin-bottom:13px;overflow-wrap:anywhere}.footer-contact address{font-style:normal;color:var(--muted);font-size:.9rem;line-height:1.8;margin-top:20px}.footer-bottom{border-top:1px solid #d1dde4;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:.76rem;color:var(--muted)}.footer-bottom p{font-size:inherit;margin:0}.footer-bottom>div{display:flex;flex-wrap:wrap;gap:24px}.footer-bottom button{border:0;background:none;color:inherit;padding:8px 0;font-size:inherit;text-decoration:underline;text-underline-offset:4px}.footer-bottom a:hover{color:var(--blue)}.cookie-notice{position:fixed;z-index:110;bottom:22px;left:24px;width:min(525px,calc(100% - 48px));background:#fff;border:1px solid #cfdae2;box-shadow:0 8px 45px #1229382d;border-radius:13px;padding:23px}.cookie-notice__copy h2{font-size:1.02rem;margin-bottom:9px;letter-spacing:-.015em}.cookie-notice__copy p,.cookie-notice p{font-size:.83rem;line-height:1.6;color:var(--muted);margin-bottom:16px}.cookie-notice__actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.cookie-notice .button{min-height:43px;padding:10px 19px;font-size:.82rem}.cookie-notice__actions>a{font-size:.82rem;text-decoration:underline;text-underline-offset:4px;color:var(--blue)}.cookie-notice [data-cookie-clear]{font-size:.77rem;color:var(--muted);padding:8px 0;border:0;background:none;text-decoration:underline;text-underline-offset:3px}.not-found{padding-block:100px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.hero__phone{margin-top:26px}.hero__phone:after,.service-card .text-link:after{display:none}.hero__note>span:first-child{font-size:2.4rem;line-height:1;font-weight:700;color:var(--blue);letter-spacing:-.05em}.hero__note>span:last-child{font-size:.82rem;line-height:1.45}.proof-strip>.proof-strip__inner{grid-template-columns:1.2fr .85fr 1.1fr 1fr}.proof-strip__item{flex-direction:column;align-items:flex-start;justify-content:center;gap:3px}.proof-strip__item--logo{flex-direction:row;align-items:center;gap:17px}.proof-strip__item--logo .gas-safe-mark{width:66px;height:60px;object-fit:contain;background:#fff;border-radius:4px}.proof-strip__item--logo>span{font-size:.84rem;line-height:1.45;color:#fff}.section--dark .callout{background:transparent;border:0;padding:0;margin-block:0;display:flex;align-items:center;justify-content:space-between;gap:45px}.section--dark .callout>div:first-child{max-width:690px}.section--dark .callout h2{margin-bottom:18px}.section--dark .callout .button-row{flex-shrink:0;margin-top:0}.section--dark .button--outline{color:white;border-color:#ffffff70}.section--dark .button--outline:hover{background:#ffffff15}.page-about .split__media img{aspect-ratio:3/4}.page-about .feature-grid{grid-template-columns:repeat(4,1fr)}.enquiry-panel{border-radius:15px;padding:38px;background:white;border:1px solid var(--line)}.enquiry-panel>h2{font-size:1.8rem;margin-bottom:12px}.form-intro{font-size:.84rem;color:var(--muted);margin-bottom:28px}.enquiry-panel .enquiry-form{padding:0;border:0;background:transparent;border-radius:0}.field__help{font-size:.78rem;color:var(--muted);margin-top:8px}.form-privacy{font-size:.8rem;line-height:1.65;color:var(--muted);margin-block:0 24px}.form-privacy a{text-decoration:underline;text-underline-offset:4px;color:var(--blue)}.form-status{margin-bottom:22px}.legal-nav>ul{padding:0;margin:0;list-style:none}.legal-nav li{line-height:1.4}.legal-content>section+section{margin-top:40px}.legal-content [data-cookie-open]{padding:13px 18px;background:var(--pale);color:var(--blue);border:1px solid #b5cddd;border-radius:6px;font-size:.88rem;font-weight:700}.noscript-menu{display:none}
@media(min-width:1500px){.hero{padding-block:70px}.hero__inner{gap:75px}.hero__image{aspect-ratio:1.16}}
@media(max-width:1150px){.container{width:calc(100% - 64px)}.header-inner{gap:20px;height:84px}.site-logo{width:215px}.desktop-nav{gap:18px}.header-contact{display:none}.hero__inner{gap:38px}.hero__image{aspect-ratio:.94}.hero__note{left:-14px;bottom:18px;padding:17px}.split{gap:50px}.footer-grid{gap:45px}.service-section{gap:50px}.contact-layout{gap:45px}.service-card__body{padding:23px}}
@media(max-width:850px){.container{width:calc(100% - 48px)}.desktop-nav{display:none}.menu-toggle{display:flex}.header-inner{height:78px}.site-logo{width:225px}.section{padding-block:70px}.hero{padding-block:34px 46px;background:linear-gradient(180deg,#fff 0%,#fff 64%,#f2f7fa 64%)}.hero__inner{grid-template-columns:1fr;gap:24px}.hero__copy{padding-block:10px}.hero__copy h1{max-width:700px;font-size:clamp(3rem,7.8vw,4.6rem)}.hero__copy .lead{max-width:650px}.hero__image{aspect-ratio:16/11;max-height:560px}.hero__note{left:20px;bottom:20px}.proof-strip>.container{grid-template-columns:1fr}.proof-strip__item{padding:20px 0;border-right:0;border-bottom:1px solid #ffffff25}.proof-strip__item:last-child{border-bottom:0}.proof-strip__item strong{font-size:1rem}.proof-strip__item span{margin:0}.service-grid{gap:16px}.service-card__image{height:180px}.service-card__body{padding:20px}.service-card__body h3{font-size:1.12rem}.service-card__body p{font-size:.87rem}.split{grid-template-columns:1fr;gap:35px}.split__media img{aspect-ratio:4/3;max-height:530px}.split__media--portrait img{aspect-ratio:4/3;object-position:center 47%}.feature-grid{gap:25px}.section-heading{gap:25px}.section-heading .text-link{max-width:180px}.contact-layout{grid-template-columns:1fr;gap:42px}.contact-details{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}.contact-details>h2,.contact-details>.lead,.contact-details>p{grid-column:1/-1}.contact-detail a{font-size:1.05rem}.service-section{gap:35px;grid-template-columns:1.15fr 1fr}.service-list{columns:1}.gallery-grid{columns:2}.footer-grid{grid-template-columns:1.2fr .75fr;gap:40px}.footer-contact{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:0 30px}.footer-contact h2{grid-column:1/-1}.footer-contact address{margin:0;grid-column:2;grid-row:2/4}.legal-layout{grid-template-columns:1fr;gap:35px}.legal-nav{position:static;display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.cta-inner{display:block}.cta-inner .button-row{margin-top:25px}.mobile-actions{position:fixed;bottom:0;left:0;right:0;z-index:80;display:grid;grid-template-columns:1fr 1fr;background:white;box-shadow:0 -4px 24px #12293813;padding:10px 20px calc(10px + env(safe-area-inset-bottom));gap:10px;border-top:1px solid var(--line)}.mobile-actions a{display:flex;align-items:center;justify-content:center;gap:10px;min-height:46px;border-radius:6px;font-size:.85rem;font-weight:700;color:var(--blue);border:1px solid #b4cbdc}.mobile-actions a:last-child{background:var(--blue);color:white;border-color:var(--blue)}.mobile-actions svg{width:18px;height:18px}.site-footer{padding-bottom:calc(76px + env(safe-area-inset-bottom))}.cookie-notice{bottom:calc(85px + env(safe-area-inset-bottom));left:20px;width:min(525px,calc(100% - 40px))}}
@media(max-width:580px){.container{width:calc(100% - 40px)}.header-inner{height:73px}.site-logo{width:205px}.menu-toggle{width:43px;height:43px}.hero{padding-block:25px 34px}.hero__copy h1{font-size:clamp(2.8rem,10.5vw,3.7rem);margin-bottom:23px;letter-spacing:-.05em}.hero__copy .eyebrow{font-size:.65rem;margin-bottom:21px}.hero__copy .lead{font-size:1rem;line-height:1.65}.button-row{gap:10px;margin-top:25px}.button{padding:14px 20px;min-height:51px;font-size:.85rem}.hero__copy .button-row .button{flex:1;padding-inline:12px}.hero__image{aspect-ratio:1.07;border-radius:12px}.hero__note{left:13px;bottom:13px;max-width:calc(100% - 26px);padding:13px 15px;gap:11px}.hero__note img{width:42px;height:39px}.hero__note p,.hero__note span{font-size:.76rem}.hero__note strong{font-size:.83rem}.section{padding-block:56px}h2{font-size:2rem;letter-spacing:-.04em}.eyebrow{margin-bottom:18px;font-size:.67rem}.section-heading{display:block;margin-bottom:30px}.section-heading .text-link{max-width:none;margin-top:12px}.service-grid{grid-template-columns:1fr;gap:23px}.service-card__image{height:250px}.service-card__body{padding:26px}.service-card__body h3{font-size:1.4rem}.service-card__body p{font-size:.94rem}.service-card__number{margin-bottom:12px}.feature-grid{grid-template-columns:1fr;gap:26px}.feature{padding-top:20px}.feature h3{font-size:1.2rem}.split{gap:28px}.split__media img{aspect-ratio:1.08}.split__media--portrait img{aspect-ratio:3/4}.mini-gallery{grid-template-columns:1fr 1fr;gap:12px}.mini-gallery a:last-child{grid-column:1/-1}.mini-gallery a:last-child img{aspect-ratio:16/9}.brand-list{gap:18px 25px}.brand-list li{font-size:1.1rem}.callout{padding:23px}.page-intro{padding-block:41px 38px}.page-intro h1{font-size:2.9rem;letter-spacing:-.05em;margin-bottom:20px}.page-intro .lead{font-size:1.02rem}.service-section{grid-template-columns:1fr;gap:28px;padding-block:46px}.service-section__image{position:static;order:2}.service-section__image img{aspect-ratio:1;object-position:center}.service-list{columns:1}.faq-item summary{font-size:1rem;padding-block:21px}.faq-item summary:after{top:17px}.faq-answer p,.faq-answer li{font-size:.94rem}.contact-details{display:block}.contact-detail{padding-block:23px}.contact-detail a{font-size:1.12rem}.enquiry-form{padding:24px 20px;margin-inline:-2px}.enquiry-form h2{font-size:1.6rem}.field-row{grid-template-columns:1fr;gap:0}.field{margin-bottom:20px}.enquiry-form .button{width:100%}.gallery-grid{column-gap:12px}.gallery-item{margin-bottom:12px;border-radius:7px}.gallery-item:after{width:29px;height:29px;right:8px;bottom:8px;font-size:1.15rem}.gallery-dialog img{max-width:calc(100vw - 24px);max-height:calc(100dvh - 170px)}.gallery-dialog button{width:42px;height:42px}.gallery-close{top:18px;right:16px}.gallery-prev,.gallery-next{top:auto;bottom:30px}.gallery-prev{left:calc(50% - 56px)}.gallery-next{right:calc(50% - 56px)}.footer-grid{grid-template-columns:1fr 1fr;gap:34px 25px;padding-bottom:30px}.footer-brand{grid-column:1/-1}.footer-brand img:first-child{width:240px}.footer-brand p{max-width:350px}.footer-brand .gas-safe-logo{margin-top:19px;width:59px}.footer-contact{display:block;grid-column:auto}.footer-contact a{font-size:.83rem}.footer-contact address{font-size:.82rem;margin-top:16px}.footer-links a{font-size:.84rem}.site-footer{padding-top:45px}.footer-bottom{display:block;padding-block:22px}.footer-bottom>div{margin-top:13px;gap:19px}.cookie-notice{left:12px;bottom:calc(81px + env(safe-area-inset-bottom));width:calc(100% - 24px);padding:19px 20px;border-radius:11px}.cookie-notice__copy p,.cookie-notice p{font-size:.78rem;margin-bottom:13px}.cookie-notice__copy h2{font-size:.96rem}.cookie-notice__actions{gap:15px}.legal-nav{display:block}.legal-content h2{font-size:1.35rem;margin-top:34px}.legal-content p,.legal-content li{font-size:.94rem}.mobile-actions{padding-inline:15px}.proof-strip__item{padding-block:18px}}
@media(max-width:850px){.proof-strip>.proof-strip__inner{grid-template-columns:1fr 1fr}.proof-strip__item{padding-inline:15px;border-right:1px solid #ffffff25;border-bottom:1px solid #ffffff25}.proof-strip__item:nth-child(2n){border-right:0}.proof-strip__item:nth-child(3){padding-left:0}.proof-strip__item:nth-child(n+3){border-bottom:0}.proof-strip__item--logo .gas-safe-mark{width:52px;height:47px}.page-about .feature-grid{grid-template-columns:1fr 1fr}.section--dark .callout{display:block}.section--dark .callout .button-row{margin-top:25px}.noscript-menu{display:block}.noscript-menu .container{width:100%;display:flex;gap:5px 18px;flex-wrap:wrap}.noscript-menu a{padding:10px 0;border-bottom:0}.enquiry-panel{padding:32px}.page-about .split__media img{max-height:600px;object-position:center 50%}}
@media(max-width:580px){.proof-strip__item strong{font-size:.94rem}.proof-strip__item span{font-size:.76rem}.proof-strip__item--logo{gap:10px}.proof-strip__item--logo>span{font-size:.77rem}.hero__note>span:first-child{font-size:2rem}.hero__note>span:last-child{font-size:.76rem}.page-about .feature-grid{grid-template-columns:1fr}.enquiry-panel{padding:26px 20px}.enquiry-panel>h2{font-size:1.6rem}.section--dark .callout .button-row{flex-direction:column;align-items:stretch}.legal-nav{display:block}}
.desktop-nav .nav-link[aria-current=page]:after{width:100%}a.text-link:after{display:none}.menu-icon{position:relative;display:block;width:20px;height:18px}.menu-line{position:absolute;left:0;width:20px;height:2px;border-radius:2px;background:currentColor;transition:transform .34s cubic-bezier(.22,1,.36,1),opacity .2s ease;transform-origin:center}.menu-line:nth-child(1){top:2px}.menu-line:nth-child(2){top:8px}.menu-line:nth-child(3){top:14px}.menu-toggle[aria-expanded=true] .menu-line:nth-child(1){transform:translateY(6px) rotate(45deg)}.menu-toggle[aria-expanded=true] .menu-line:nth-child(2){opacity:0;transform:scaleX(.25)}.menu-toggle[aria-expanded=true] .menu-line:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media(max-width:850px){.mobile-menu:not(.noscript-menu){position:absolute;top:100%;left:0;right:0;max-height:calc(100dvh - 78px);overflow-y:auto;box-shadow:0 15px 30px #10293818}.mobile-menu .nav-link[aria-current=page]:after{display:none}}
.hero__copy h1{font-size:clamp(2.65rem,4.45vw,4.4rem)}.hero__closing{white-space:nowrap}
@media(max-width:850px){.hero__copy h1{font-size:clamp(2.6rem,6.7vw,4.1rem)}}
@media(max-width:580px){.hero__copy h1{font-size:clamp(1.875rem,9.55vw,2.9rem)}}
/* Accessible boundaries, focus treatments and keyboard scroll clearance. */
.field input,.field select,.field textarea{border-color:#738795}
.section--dark :focus-visible{outline-color:#b9dff7}
.gallery-dialog button:focus-visible{outline:3px solid #fff;outline-offset:3px;box-shadow:0 0 0 6px #152936}
.form-status:focus{outline:3px solid var(--blue);outline-offset:4px}
:where(a,button,input,select,textarea,summary,[tabindex]){scroll-margin-top:110px;scroll-margin-bottom:24px}
main>section[id]{scroll-margin-top:110px}
.menu-toggle:not([data-menu-ready]){display:none}
.contact-detail a{display:block;min-height:44px;padding-block:7px}
.cookie-notice{max-height:calc(100dvh - 44px);overflow-y:auto}
.cookie-notice .button{min-height:44px}
.cookie-notice__actions>a{min-height:44px;display:inline-flex;align-items:center}
.cookie-notice [data-cookie-clear],.footer-bottom button{min-height:44px}
.footer-bottom a{min-height:44px;display:inline-flex;align-items:center}
@media(max-width:850px){:where(a,button,input,select,textarea,summary,[tabindex]){scroll-margin-top:90px;scroll-margin-bottom:calc(96px + env(safe-area-inset-bottom))}main>section[id]{scroll-margin-top:90px}.cookie-notice{max-height:calc(100dvh - 112px - env(safe-area-inset-bottom))}.footer-links a,.footer-contact a{display:flex;align-items:center;min-height:44px;padding-block:8px}}
@media(max-width:580px){.menu-toggle{width:44px;height:44px}.gallery-dialog button{width:44px;height:44px}}
/* Home's contact bar appears after the hero; other pages retain their fixed bar. */
@media(max-width:850px){
  .page-home[data-home-actions-ready] .mobile-actions{transition:opacity .22s ease,transform .28s cubic-bezier(.22,1,.36,1),visibility 0s linear .28s}
  .page-home[data-home-actions="hidden"] .mobile-actions{opacity:0;transform:translateY(calc(100% + 1px));visibility:hidden;pointer-events:none}
  .page-home[data-home-actions="visible"] .mobile-actions{opacity:1;transform:translateY(0);visibility:visible;transition-delay:0s}
  .page-home[data-home-actions="visible"] .mobile-actions:focus-within{opacity:1;transform:none;transition:none}
  .page-home[data-home-actions-ready] .cookie-notice{transition:bottom .28s cubic-bezier(.22,1,.36,1)}
  .page-home[data-home-actions="hidden"] .cookie-notice{bottom:calc(16px + env(safe-area-inset-bottom));max-height:calc(100dvh - 48px - env(safe-area-inset-bottom))}
}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* Content is visible by default. These states are added only by reveal.js. */
[data-reveal] {
  --reveal-x: 0px;
  --reveal-y: 22px;
  --reveal-scale: 1;
  --reveal-delay: 0ms;
  --reveal-duration: 620ms;
  --reveal-easing: cubic-bezier(.22, .7, .2, 1);
}

@media (prefers-reduced-motion: no-preference) {
  [data-reveal][data-reveal-state="pending"],
  [data-reveal][data-reveal-state="shown"] {
    transition-property: opacity, transform, clip-path;
    transition-duration: var(--reveal-duration);
    transition-delay: var(--reveal-delay);
    transition-timing-function: var(--reveal-easing);
  }

  [data-reveal][data-reveal-state="pending"] {
    opacity: 0;
    transform: translate3d(var(--reveal-x), var(--reveal-y), 0) scale(var(--reveal-scale));
  }

  [data-reveal="hero-copy"] { --reveal-y: 12px; --reveal-duration: 570ms; }
  [data-reveal="hero-copy"][data-reveal-state="pending"] { opacity: .35; }
  [data-reveal="hero-image"] { --reveal-y: 0px; --reveal-scale: 1.015; --reveal-duration: 780ms; }
  [data-reveal="hero-image"][data-reveal-state="pending"] { opacity: .65; }
  [data-reveal="intro"] { --reveal-y: 16px; --reveal-duration: 570ms; }
  [data-reveal="proof"] { --reveal-y: 14px; --reveal-duration: 480ms; }
  [data-reveal="heading"] { --reveal-y: 23px; --reveal-duration: 610ms; }
  [data-reveal="heading-soft"] { --reveal-y: 15px; --reveal-duration: 650ms; }
  [data-reveal="card-rise"] { --reveal-y: 30px; --reveal-duration: 640ms; }
  [data-reveal="card-soft"] { --reveal-y: 22px; --reveal-scale: .985; --reveal-duration: 680ms; }
  [data-reveal="copy-left"] { --reveal-x: -26px; --reveal-y: 0px; --reveal-duration: 670ms; }
  [data-reveal="copy-right"] { --reveal-x: 26px; --reveal-y: 0px; --reveal-duration: 670ms; }
  [data-reveal="copy-rise"] { --reveal-y: 25px; --reveal-duration: 640ms; }
  [data-reveal="copy-soft"] { --reveal-y: 14px; --reveal-duration: 650ms; }
  [data-reveal="image-up"], [data-reveal="image-side"] {
    --reveal-y: 17px;
    --reveal-scale: 1.025;
    --reveal-duration: 820ms;
  }
  [data-reveal="image-up"][data-reveal-state="pending"] {
    opacity: .3;
    clip-path: inset(12% 0 0 0 round 14px);
  }
  [data-reveal="image-side"][data-reveal-state="pending"] {
    opacity: .3;
    clip-path: inset(0 13% 0 0 round 14px);
  }
  [data-reveal="image-up"][data-reveal-state="shown"],
  [data-reveal="image-side"][data-reveal-state="shown"] {
    clip-path: inset(0 0 0 0 round 14px);
  }
  [data-reveal="feature-step"] { --reveal-y: 21px; --reveal-duration: 590ms; }
  [data-reveal="cta-soft"] { --reveal-y: 14px; --reveal-scale: .975; --reveal-duration: 750ms; }
  [data-reveal="faq-row"] { --reveal-y: 15px; --reveal-duration: 470ms; }
  [data-reveal="gallery-rise"] { --reveal-y: 29px; --reveal-duration: 690ms; }
  [data-reveal="gallery-soft"] { --reveal-y: 20px; --reveal-scale: .98; --reveal-duration: 720ms; }
  [data-reveal="contact-copy"] { --reveal-x: -22px; --reveal-y: 8px; --reveal-duration: 630ms; }
  [data-reveal="contact-form"] { --reveal-y: 27px; --reveal-duration: 710ms; }
  [data-reveal="policy-line"] {
    --reveal-y: 9px;
    --reveal-duration: 410ms;
    --reveal-easing: ease-out;
  }

  /* A keyboard or programmatic focus never leaves a control visually hidden. */
  [data-reveal][data-reveal-state="pending"]:focus,
  [data-reveal][data-reveal-state="pending"]:focus-within {
    opacity: 1;
    transform: none;
    clip-path: none;
    transition: none;
  }
}

/* Single-column tablet layouts have 24px gutters; keep entrances within them. */
@media (max-width: 850px) and (prefers-reduced-motion: no-preference) {
  [data-reveal] { --reveal-x: 0px; }
}

@media (max-width: 580px) and (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    --reveal-x: 0px;
    --reveal-y: 13px;
    --reveal-scale: 1;
    --reveal-duration: 450ms;
  }
  [data-reveal="hero-copy"] { --reveal-y: 8px; --reveal-duration: 410ms; }
  [data-reveal="hero-image"] { --reveal-y: 0px; --reveal-scale: 1.008; --reveal-duration: 560ms; }
  [data-reveal="proof"], [data-reveal="faq-row"] { --reveal-y: 9px; --reveal-duration: 360ms; }
  [data-reveal="image-up"], [data-reveal="image-side"] { --reveal-y: 10px; --reveal-scale: 1.01; --reveal-duration: 590ms; }
  [data-reveal="image-up"][data-reveal-state="pending"] { clip-path: inset(7% 0 0 0 round 14px); }
  [data-reveal="image-side"][data-reveal-state="pending"] { clip-path: inset(0 7% 0 0 round 14px); }
  [data-reveal="cta-soft"] { --reveal-y: 9px; --reveal-scale: .987; --reveal-duration: 510ms; }
  [data-reveal="gallery-rise"], [data-reveal="gallery-soft"] { --reveal-y: 16px; --reveal-scale: 1; --reveal-duration: 470ms; }
  [data-reveal="policy-line"] { --reveal-y: 5px; --reveal-duration: 300ms; }
}

@media (prefers-reduced-motion: reduce), print {
  [data-reveal][data-reveal-state] {
    opacity: 1 !important;
    transform: none !important;
    clip-path: none !important;
    transition: none !important;
    animation: none !important;
  }
}

.slideshow{position:relative;isolation:isolate;width:100%;overflow:hidden;background:var(--pale,#f2f7fa);--slideshow-play-state:paused}
.slideshow--hero{aspect-ratio:1.13;border-radius:20px 20px 20px 3px}
.slideshow--heating{aspect-ratio:1.05;border-radius:14px}
.slideshow__frame{position:absolute;inset:0;opacity:0;z-index:0;transition:opacity .65s ease;pointer-events:none}
.slideshow__frame.is-active{opacity:1;z-index:2}
.slideshow__frame.is-leaving{opacity:1;z-index:1}
.slideshow .slideshow__image{position:absolute;inset:0;display:block;width:100%;height:100%;max-height:none;aspect-ratio:auto;object-fit:cover;border-radius:0;transform:scale(1.025);transform-origin:center}
.slideshow[data-slideshow-ready] .slideshow__frame:is(.is-active,.is-leaving) .slideshow__image{animation:tlb-slideshow-ken-burns 8s linear both;animation-play-state:var(--slideshow-play-state)}
.slideshow[data-slideshow-ready] .slideshow__frame:nth-child(even):is(.is-active,.is-leaving) .slideshow__image{animation-name:tlb-slideshow-ken-burns-reverse}
.slideshow.is-playing{--slideshow-play-state:running}
@keyframes tlb-slideshow-ken-burns{from{transform:scale(1.025) translate(-.5%,.2%)}to{transform:scale(1.08) translate(.6%,-.3%)}}
@keyframes tlb-slideshow-ken-burns-reverse{from{transform:scale(1.08) translate(.6%,-.3%)}to{transform:scale(1.025) translate(-.5%,.2%)}}
@media(min-width:1500px){.slideshow--hero{aspect-ratio:1.16}}
@media(max-width:1150px){.slideshow--hero{aspect-ratio:.94}}
@media(max-width:850px){.slideshow--hero{aspect-ratio:16/11;max-height:560px}.slideshow--heating{aspect-ratio:4/3;max-height:530px}}
@media(max-width:580px){.slideshow--hero{aspect-ratio:1.07;border-radius:12px}.slideshow--heating{aspect-ratio:1.08}}
@media(prefers-reduced-motion:reduce){.slideshow__frame{transition:none}.slideshow[data-slideshow-ready] .slideshow__image{animation:none!important;transform:none}}