:root {
  --navy: #183348;
  --teal: #087e8b;
  --lime: #9abf3b;
  --mist: #eef4f3;
  --ink: #26343b;
  --muted: #607179;
  --white: #ffffff;
  --line: #d6e2e0;
  --shadow: 0 16px 40px rgba(24, 51, 72, .10);
  --radius: 18px;
  --max: 1240px;
  --reading: 760px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--white); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 17px; line-height: 1.65; }
a { color: var(--teal); text-underline-offset: .16em; text-decoration-thickness: 1.5px; }
a:hover { color: #055a63; }
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--lime); outline-offset: 3px; }
.skip-link { position: fixed; z-index: 100; top: -100px; left: 18px; background: var(--navy); color: var(--white); padding: .65rem .9rem; border-radius: 0 0 8px 8px; font-weight: 700; }
.skip-link:focus { top: 0; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.header-inner { max-width: var(--max); min-height: 76px; margin: auto; padding: 10px 28px; display: flex; align-items: center; gap: 26px; }
.logo { display: inline-flex; flex: 0 0 auto; width: 205px; }
.logo img { width: 100%; height: auto; }
.site-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 3px; list-style: none; margin: 0; padding: 0; }
.nav-list > li > a, .submenu-toggle { color: var(--navy); font-size: .86rem; font-weight: 750; text-decoration: none; letter-spacing: .01em; }
.nav-list > li > a { padding: .6rem .42rem; display: inline-block; }
.nav-list > li > a:hover, .submenu-toggle:hover { color: var(--teal); }
.nav-group { position: relative; display: flex; align-items: center; }
.submenu-toggle { appearance: none; background: transparent; border: 0; padding: .54rem .2rem; }
.submenu-toggle::after { content: "⌄"; margin-left: .22rem; font-size: .9em; }
.dropdown { display: none; position: absolute; top: calc(100% + 9px); left: -8px; width: min(360px, 78vw); padding: .6rem; border: 1px solid var(--line); border-radius: 12px; background: var(--white); box-shadow: var(--shadow); }
.dropdown a { display: block; padding: .55rem .65rem; color: var(--ink); border-radius: 7px; text-decoration: none; font-size: .9rem; line-height: 1.35; }
.dropdown a:hover, .dropdown a:focus { background: var(--mist); color: var(--navy); }
.nav-group:hover .dropdown, .nav-group:focus-within .dropdown, .nav-group.is-expanded .dropdown { display: block; }
.mobile-toggle { display: none; margin-left: auto; background: var(--navy); color: var(--white); border: 0; border-radius: 8px; padding: .48rem .7rem; font-weight: 700; }

.hero { position: relative; overflow: hidden; background: var(--navy); color: var(--white); }
.hero::before { content: ""; position: absolute; width: 68vw; height: 68vw; max-width: 900px; max-height: 900px; right: -23vw; top: -38vw; border: 1px solid rgba(154,191,59,.38); border-radius: 50%; box-shadow: 0 0 0 30px rgba(8,126,139,.12), 0 0 0 76px rgba(255,255,255,.035); }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 5px; background: linear-gradient(90deg, var(--lime) 0 21%, var(--teal) 21% 72%, transparent 72%); }
.hero-inner { position: relative; z-index: 1; max-width: var(--max); margin: auto; padding: 66px 28px 55px; }
.eyebrow { display: flex; align-items: center; gap: .6rem; margin: 0 0 1rem; color: #d2e5e1; font-size: .79rem; font-weight: 800; text-transform: uppercase; letter-spacing: .12em; }
.eyebrow::before { content: ""; width: 32px; height: 2px; background: var(--lime); }
h1 { max-width: 920px; margin: 0; font-size: clamp(2.1rem, 4.5vw, 4.4rem); line-height: 1.04; letter-spacing: -.04em; color: var(--white); }
.hero-rule { display: flex; align-items: center; gap: 10px; margin-top: 30px; color: #d6e2e0; font-size: .88rem; }
.hero-rule span { width: 8px; height: 8px; border: 2px solid var(--lime); border-radius: 50%; }
.hero-rule::after { content: ""; width: 125px; height: 1px; background: rgba(255,255,255,.35); }

.breadcrumbs { max-width: var(--max); margin: 0 auto; padding: 16px 28px; color: var(--muted); font-size: .84rem; }
.breadcrumbs a { color: var(--muted); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: .45rem; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li + li::before { content: "→"; margin-right: .45rem; color: var(--teal); }

.page-layout { max-width: var(--max); margin: 0 auto; padding: 26px 28px 72px; }
.article { max-width: var(--reading); }
.article > *:first-child { margin-top: 0; }
.article h2 { margin: 3.4rem 0 1rem; padding-top: 1.3rem; color: var(--navy); font-size: clamp(1.45rem, 2.4vw, 2.2rem); line-height: 1.17; letter-spacing: -.025em; border-top: 1px solid var(--line); }
.article h3 { margin: 2rem 0 .65rem; color: var(--navy); font-size: 1.22rem; line-height: 1.3; }
.article p, .article li { max-width: var(--reading); }
.article ul, .article ol { margin: 1.15rem 0 1.4rem; padding-left: 1.25rem; }
.article li { margin: .52rem 0; padding-left: .15rem; }
.article strong { color: var(--navy); }
.article blockquote { margin: 1.7rem 0; padding: 1rem 1.25rem; border-left: 4px solid var(--teal); background: var(--mist); }
.article table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; font-size: .94rem; }
.article th, .article td { padding: .7rem .8rem; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.article th { color: var(--navy); background: var(--mist); }
.article code { padding: .08rem .28rem; border-radius: 4px; background: var(--mist); color: var(--navy); }

.measurement-image { position: relative; margin: 2.2rem 0; overflow: hidden; border-radius: var(--radius); background: var(--mist); box-shadow: var(--shadow); aspect-ratio: 16 / 9; }
.measurement-image::before { content: ""; position: absolute; z-index: 1; inset: auto 0 0; height: 4px; background: linear-gradient(90deg,var(--lime),var(--teal) 55%,transparent 55%); }
.measurement-image img { width: 100%; height: 100%; object-fit: cover; }
.measurement-image--intro { max-width: 980px; margin: 0 0 3rem; }
.measurement-image--intro::after { content: ""; position: absolute; right: 0; top: 0; width: 30%; height: 100%; background: linear-gradient(90deg, transparent, rgba(24,51,72,.13)); pointer-events: none; }

.boundary-box { margin: 2.2rem 0; padding: 1.35rem 1.45rem; border: 1px solid rgba(8,126,139,.42); border-radius: 12px; background: linear-gradient(135deg, rgba(238,244,243,.85), #fff); }
.boundary-box p:last-child { margin-bottom: 0; }
.related { max-width: 980px; margin-top: 4.5rem; padding: 28px; border-top: 5px solid var(--teal); background: var(--mist); }
.related h2 { margin: 0 0 1rem; color: var(--navy); font-size: 1.3rem; }
.related ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem 1.4rem; margin: 0; padding: 0; list-style: none; }
.related a { font-weight: 700; }
.cta { max-width: 980px; margin-top: 28px; padding: 32px; color: var(--white); background: var(--navy); border-radius: 0 0 var(--radius) var(--radius); }
.cta h2 { margin: 0 0 .4rem; color: var(--white); font-size: 1.45rem; }
.cta p { margin: 0 0 1rem; color: #d2e5e1; }
.button { display: inline-flex; align-items: center; gap: .5rem; padding: .7rem 1rem; border: 1px solid transparent; border-radius: 7px; background: var(--lime); color: var(--navy); font-weight: 800; text-decoration: none; }
.button:hover { background: #b4d259; color: var(--navy); }

.faq { margin-top: 3.4rem; border-top: 1px solid var(--line); }
.faq > h2 { border: 0; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { padding: 1rem 2.4rem 1rem 0; color: var(--navy); cursor: pointer; font-weight: 800; line-height: 1.35; list-style: none; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: .2rem; top: .72rem; color: var(--teal); font-size: 1.55rem; font-weight: 400; }
.faq-item[open] summary::after { content: "–"; }
.faq-answer { padding: 0 0 1rem; }
.faq-answer > *:first-child { margin-top: 0; }

.enquiry { max-width: 900px; margin: 0 auto; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
.enquiry h2 { margin: 0 0 .4rem; color: var(--navy); font-size: 1.7rem; }
.enquiry-lede { margin-top: 0; color: var(--muted); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
.field { display: flex; flex-direction: column; gap: .38rem; }
.field label { color: var(--navy); font-weight: 750; font-size: .91rem; }
.field label span { color: var(--muted); font-weight: 500; }
.field input, .field select, .field textarea { width: 100%; padding: .72rem .78rem; border: 1px solid #9cabad; border-radius: 7px; color: var(--ink); background: #fff; }
.field textarea { min-height: 130px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--teal); outline: 3px solid rgba(8,126,139,.16); }
.field-error { margin: .1rem 0 0; color: #a51f2a; font-size: .85rem; line-height: 1.35; }
.consent { margin: 1.1rem 0; display: flex; align-items: flex-start; gap: .65rem; font-size: .9rem; }
.consent input { margin-top: .38rem; accent-color: var(--teal); }
.form-status { margin-top: 1rem; padding: .72rem .82rem; border-radius: 7px; font-size: .92rem; }
.form-status.success { color: #154f2e; background: #e8f4e9; border: 1px solid #81ba8c; }
.form-status.error { color: #831f28; background: #fcebed; border: 1px solid #e9a0a7; }
.hp-field { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.contact-email { margin: 0 0 1.7rem; color: var(--navy); font-weight: 750; }

.html-sitemap { max-width: var(--max); margin: auto; padding: 56px 28px; }
.html-sitemap h1 { color: var(--navy); font-size: clamp(2rem, 4vw, 3.8rem); }
.sitemap-columns { columns: 3 260px; column-gap: 38px; }
.sitemap-columns li { break-inside: avoid; margin: .45rem 0; }
.sitemap-columns ul { padding-left: 1rem; }

.site-footer { background: var(--navy); color: #d2e5e1; }
.footer-inner { max-width: var(--max); margin: auto; padding: 48px 28px 24px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 2fr 1fr; gap: 34px; }
.footer-mark { width: 230px; max-width: 100%; padding: 8px; border-radius: 9px; background: var(--white); }
.footer-heading { margin: 0 0 .7rem; color: var(--white); font-size: .95rem; letter-spacing: .06em; text-transform: uppercase; }
.footer-nav { columns: 2; margin: 0; padding: 0; list-style: none; }
.footer-nav li { margin: .38rem 0; }
.site-footer a { color: #d2e5e1; }
.site-footer a:hover { color: var(--lime); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 38px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.17); color: #abc2bd; font-size: .8rem; }

.not-found { min-height: 70vh; display: grid; place-items: center; padding: 40px 28px; background: var(--mist); }
.not-found > div { max-width: 640px; padding: 42px; background: #fff; border-top: 5px solid var(--teal); box-shadow: var(--shadow); }
.not-found h1 { color: var(--navy); font-size: 3rem; }

@media (max-width: 1080px) { .header-inner { gap: 13px; padding-inline: 20px; } .nav-list > li > a, .submenu-toggle { font-size: .78rem; } .logo { width: 178px; } }
@media (max-width: 880px) {
  .header-inner { min-height: 67px; } .mobile-toggle { display: inline-flex; } .site-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; padding: 12px 20px 22px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); } .site-nav.is-open { display: block; } .nav-list { display: block; } .nav-list > li { border-bottom: 1px solid var(--line); } .nav-list > li > a { padding: .78rem 0; } .nav-group { display: grid; grid-template-columns: 1fr auto; } .nav-group > a { grid-column: 1; } .submenu-toggle { grid-column: 2; padding: .7rem .45rem; } .dropdown { grid-column: 1 / -1; position: static; width: auto; box-shadow: none; border: 0; padding: 0 0 .6rem .55rem; } .nav-group:hover .dropdown { display: none; } .nav-group.is-expanded .dropdown { display: block; } .hero-inner, .page-layout { padding-inline: 20px; } .breadcrumbs { padding-inline: 20px; } .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: 1 / -1; } }
@media (max-width: 640px) { body { font-size: 16px; } .logo { width: 170px; } .hero-inner { padding-top: 50px; padding-bottom: 43px; } .hero-rule { margin-top: 20px; } .related { padding: 21px; } .related ul { grid-template-columns: 1fr; } .form-grid { grid-template-columns: 1fr; } .form-grid .full { grid-column: auto; } .enquiry { padding: 20px; } .footer-grid { grid-template-columns: 1fr; } .footer-grid > :first-child { grid-column: auto; } .footer-nav { columns: 1; } .footer-bottom { display: block; } .footer-bottom p { margin: .35rem 0; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }