:root{--navy:#102e50;--blue:#135fb4;--blue-dark:#0d488b;--pale:#edf5fc;--paler:#f7faff;--line:#d9e4ef;--text:#263d54;--muted:#52687d;--white:#fff;--max:1240px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;background:var(--white);color:var(--text);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75}h1,h2,h3,p,figure{margin:0}h1,h2,h3{color:var(--navy);line-height:1.15;letter-spacing:-.035em}h1{font-size:clamp(38px,4.35vw,61px);font-weight:600}h2{font-size:clamp(28px,3vw,38px);font-weight:600}h3{font-size:23px;font-weight:600}p+p{margin-top:16px}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button,input,select,textarea{font:inherit}button{cursor:pointer}button,a{touch-action:manipulation}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid #4b8fdc;outline-offset:4px}.container{width:min(calc(100% - 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a:hover{text-decoration:underline}.eyebrow{font-size:10px;line-height:1.5;letter-spacing:1.7px;font-weight:700;text-transform:uppercase;color:var(--blue);margin-bottom:18px}.product-hero{padding-bottom:52px}.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:55px;align-items:center}.hero-copy .supporting-line{font-size:20px;color:var(--blue);font-weight:500;margin-top:20px}.hero-copy .intro{font-size:15px;line-height:1.8;margin-block:22px 28px;color:var(--muted)}.photo-card{border:1px solid var(--line);background:var(--paler);padding:12px}.plate-photo-frame{position:relative;aspect-ratio:2350/1250;overflow:hidden;background:#dbe4ec}.plate-photo-frame img{position:absolute;width:238.979%;max-width:none;height:auto;left:-138.979%;top:-196%;}.photo-card figcaption{font-size:11px;line-height:1.5;color:var(--muted);padding:12px 4px 2px;display:flex;justify-content:space-between;gap:15px}.photo-card figcaption 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/* Tubes page: the same ASC white/blue system; no fabricated product imagery. */
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.tube-detail-photo{margin-top:27px;padding:11px;background:var(--paler);border:1px solid var(--line)}.tube-detail-photo img{width:100%;height:auto}.tube-detail-photo figcaption{padding:11px 3px 0;font-size:11px;line-height:1.7;color:var(--muted)}@media(max-width:700px){.tube-detail-photo{padding:8px;margin-top:23px}.tube-detail-photo figcaption{font-size:10px}}
.tube-hero-photo+.route-summary{display:grid;grid-template-columns:1fr 1fr;gap:20px}.tube-hero-photo+.route-summary .tube-route{padding:0;border-top:0}.tube-hero-photo+.route-summary .tube-route+.tube-route{border-left:1px solid var(--line);padding-left:20px}.tube-hero-photo+.route-summary .tube-route a{font-size:11px;margin-top:12px}.tube-hero-photo+.route-summary .tube-route span{font-size:8px;letter-spacing:.7px}.tube-hero-photo+.route-summary .tube-route strong{font-size:19px}@media(max-width:700px){.tube-hero-photo+.route-summary{gap:14px;padding:18px}.tube-hero-photo+.route-summary .tube-route+.tube-route{padding-left:14px}.tube-hero-photo+.route-summary .tube-route p{display:none}.tube-hero-photo+.route-summary .tube-route strong{font-size:18px}.tube-hero-photo+.route-summary .tube-route a{font-size:10px;line-height:1.6}}
/* Clean full-site shell, authored for the isolated HTML build. */
.site-navigation{position:relative}.product-menu{position:static}.product-menu>summary{cursor:pointer;list-style:none;display:flex;gap:8px;align-items:center;min-height:44px}.product-menu>summary::-webkit-details-marker{display:none}.product-menu>summary:after{content:'';width:6px;height:6px;border-right:1.5px solid;border-bottom:1.5px solid;transform:rotate(45deg);margin-top:-3px}.product-menu[open]>summary:after{transform:rotate(225deg);margin-top:3px}.product-menu-panel{position:absolute;right:0;top:calc(100% + 12px);z-index:20;width:min(840px,calc(100vw - 56px));max-height:70vh;overflow:auto;background:#fff;border:1px solid var(--line);border-radius:5px;box-shadow:0 18px 50px #102e501f;padding:28px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.product-menu-group h3{font-size:15px;margin-bottom:12px;letter-spacing:0}.product-menu-group ul{list-style:none;margin:0;padding:0}.product-menu-group li+li{margin-top:4px}.product-menu-group a{display:block;padding:6px 0;font-size:12px;line-height:1.6;font-weight:400}.product-menu-group a:hover{color:var(--blue);text-decoration:underline}.header-inner a[aria-current=page],.product-menu-group a[aria-current=page]{color:var(--blue);text-decoration:underline;text-underline-offset:4px}
.site-breadcrumbs{margin-bottom:0}.related-product-grid,.catalogue-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:26px}.related-product-card,.catalogue-card{display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:5px;background:#fff;overflow:hidden}.related-product-card figure,.catalogue-card figure{margin:0;background:var(--paler);border-bottom:1px solid var(--line)}.related-card-image{aspect-ratio:1.6;display:flex;align-items:center;justify-content:center;background:var(--paler);overflow:hidden}.related-card-image img{width:100%;height:100%;object-fit:contain}.related-card-image.plate-image .plate-card-crop{position:relative;width:100%;aspect-ratio:2350/1250;overflow:hidden}.plate-card-crop img{position:absolute;width:238.979%;max-width:none;height:auto;left:-138.979%;top:-196%;object-fit:initial}.related-product-card figcaption,.catalogue-card figcaption{padding:10px 17px;font-size:10px;line-height:1.6;color:var(--muted)}.related-product-copy,.catalogue-card-copy{display:flex;flex:1;flex-direction:column;padding:20px}.related-product-copy h3,.catalogue-card-copy h3{font-size:20px;line-height:1.3;letter-spacing:-.5px;margin-bottom:13px}.related-product-copy p,.catalogue-card-copy p{font-size:13px;line-height:1.8;color:var(--muted)}.related-card-action{margin-top:auto;padding-top:22px}.related-card-action .button{font-size:12px;gap:12px}.related-card-action small{display:block;margin-top:10px;font-size:11px;line-height:1.6;color:var(--muted)}
.site-footer-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:45px;padding-bottom:32px}.site-footer-grid h2{font-size:16px;letter-spacing:0;margin-bottom:17px}.site-footer-grid p,.site-footer-grid a{font-size:12px;line-height:1.8}.site-footer-grid ul{list-style:none;margin:0;padding:0}.site-footer-grid li{margin-bottom:9px}.site-footer-grid a:hover{text-decoration:underline}.site-footer-grid .asc-logo{width:210px;margin-bottom:20px}.site-footer-grid .contact-email{overflow-wrap:anywhere}.site-footer-grid .footer-brand-copy{max-width:310px;color:var(--muted)}
.core-section{padding-block:65px}.core-section.pale{background:var(--paler);border-block:1px solid var(--line)}.core-section .section-lead{max-width:760px;margin-top:22px;color:var(--muted);font-size:15px}.catalogue-group+.catalogue-group{margin-top:48px}.catalogue-group>h3{font-size:25px;letter-spacing:-.5px;margin-bottom:10px}.catalogue-group>p{font-size:14px;color:var(--muted);max-width:740px}.catalogue-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.catalogue-card .product-category{font-size:10px;color:var(--blue);text-transform:uppercase;letter-spacing:1px;font-weight:700;margin-bottom:10px}.core-copy{max-width:850px;margin-inline:auto}.core-copy .content-section:last-child{border-bottom:0}.contact-page-hero{max-width:800px;padding-block:20px 45px}.contact-page-hero p{margin-top:20px;color:var(--muted)}.service-note{border-left:3px solid var(--blue);padding-left:18px;margin-top:25px;font-size:14px;color:var(--muted)}
@media(max-width:1000px){.header-inner nav{gap:20px}.site-footer-grid{gap:28px}.catalogue-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.related-product-grid{grid-template-columns:1fr}.related-product-copy{padding:22px}.related-product-copy h3{font-size:23px}.site-footer-grid{grid-template-columns:1fr;gap:27px}.core-section{padding-block:42px}.core-section .section-lead{font-size:14px}.catalogue-grid{grid-template-columns:1fr}.catalogue-group+.catalogue-group{margin-top:35px}}
@media(max-width:700px){.header-inner .site-navigation{align-items:stretch;flex-direction:column;gap:0}.site-navigation>a,.product-menu>summary{min-height:46px;padding-block:11px}.header-inner .site-navigation .button{display:inline-flex;margin-top:10px}.product-menu-panel{position:static;width:100%;max-height:50vh;grid-template-columns:1fr;box-shadow:none;padding:18px;margin:0 0 12px;gap:20px}.product-menu-group a{font-size:13px;padding-block:8px}.site-footer-grid .asc-logo{width:198px}}
@media print{.product-menu-panel{display:none}.related-product-grid,.catalogue-grid{display:block}.related-product-card,.catalogue-card{break-inside:avoid;margin-bottom:20px}.related-card-action{display:none}}
.product-menu:not([open])>.product-menu-panel{display:none}.field input[readonly]{background:var(--paler);color:var(--navy)}.body-list{font-size:15px;line-height:1.85;padding-left:22px}.body-list li+li{margin-top:9px}

/* Blue/white focus contrast and identifiable form boundaries. */
:focus-visible{box-shadow:0 0 0 2px #fff!important}.field input,.field select,.field textarea,.enquiry-details-panel textarea{border-color:#7c91a6}

.core-article{padding-block:32px 60px}.core-section>.container>p{max-width:800px;margin-top:20px;color:var(--muted);font-size:15px}

/* Shared grade comparisons need balanced data columns, unlike two-column chemistry lists. */
.chemical-comparison-table{min-width:460px}.chemical-comparison-table tbody th{width:40%}

/* Format-only responsive photo wrapper; preserve the original image layout box. */
.responsive-photo{display:contents}

/* Same-origin enquiry and server-validated security code. */
.captcha-fieldset{border-top:1px solid var(--line);padding-top:20px;margin-top:5px}.captcha-display{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:14px;min-height:80px}.captcha-display img{display:block;width:252px;height:80px;max-width:100%;object-fit:contain;border:1px solid #bdcddd;background:#f1f7fc}.captcha-refresh{font-size:12px;min-height:42px;padding:10px 15px}.captcha-answer input{max-width:252px;letter-spacing:4px;text-transform:uppercase}.captcha-answer a,.email-route-note a{text-decoration:underline;overflow-wrap:anywhere}.captcha-answer .field-help{max-width:540px}.enquiry-honeypot{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.form-actions button:disabled,.captcha-refresh:disabled{opacity:.55;cursor:not-allowed}@media(max-width:420px){.captcha-display{gap:10px}.captcha-refresh{width:100%}}

/* Keep a completed enquiry result visible and distinct from pending/error states. */
.enquiry-action-status[data-state="success"],.enquiry-action-status[data-state="error"]{padding:18px 20px;border:1px solid;border-radius:4px;font-size:14px;font-weight:600;line-height:1.7;scroll-margin-block:100px}.enquiry-action-status[data-state="success"]{color:#145a35;background:#eef8f1;border-color:#84bf99}.enquiry-action-status[data-state="error"]{color:#8a2525;background:#fff2f2;border-color:#dc9b9b}.enquiry-action-status:focus{outline:2px solid var(--blue);outline-offset:3px}