/* Enviro Elemental Solutions: deep water navy, clean white, aqua accent. */
:root {
  --ink: #0b2a3a;
  --ink-2: #113b50;
  --ink-3: #18506a;
  --teal: #0a6f79;
  --aqua: #2ec4c6;
  --aqua-2: #7fdfe0;
  --mint: #9ad8a8;
  --paper: #ffffff;
  --tint: #eef6f7;
  --line: #d4e4e7;
  --text: #163040;
  --muted: #4a6573;
  --on-dark: #e6f3f5;
  --on-dark-muted: #a9c6ce;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(11, 42, 58, .06), 0 10px 30px -12px rgba(11, 42, 58, .18);
  --font-head: "Sora", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --gutter: clamp(16px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; background: var(--paper); color: var(--text); font: 400 17px/1.65 var(--font-body); overflow-x: hidden; }
img, svg { display: block; max-width: 100%; }
a { color: var(--teal); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
h1, h2, h3 { font-family: var(--font-head); color: var(--ink); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.1rem, 5.2vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.4rem); font-weight: 600; }
h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
small { font-size: .85em; color: var(--muted); font-weight: 400; }
address { font-style: normal; }
:focus-visible { outline: 3px solid var(--aqua); outline-offset: 2px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 8px; }
.skip:focus { top: 12px; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--gutter); }
.i { width: 1.15em; height: 1.15em; flex: none; }
.break { overflow-wrap: anywhere; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .55em; min-height: 48px; padding: 12px 22px; border-radius: 999px; font: 600 .98rem/1.2 var(--font-body); text-decoration: none; border: 2px solid transparent; cursor: pointer; transition: background .2s, color .2s, border-color .2s, transform .2s; }
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(3px); }
.btn--accent { background: var(--aqua); color: var(--ink); }
.btn--accent:hover { background: var(--aqua-2); color: var(--ink); }
.btn--line { border-color: rgba(230, 243, 245, .45); color: var(--on-dark); }
.btn--line:hover { border-color: var(--on-dark); color: #fff; background: rgba(255, 255, 255, .06); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn--ghost:hover { border-color: var(--teal); color: var(--teal); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.link-arrow { display: inline-flex; align-items: center; gap: .45em; font-weight: 600; color: var(--teal); text-decoration: none; }
.link-arrow .i { transition: transform .2s; }
a:hover .link-arrow .i, .link-arrow:hover .i { transform: translateX(3px); }

.kicker { display: inline-flex; align-items: center; gap: 10px; font: 500 .78rem/1.2 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--teal); margin-bottom: 14px; }
.kicker::before { content: ""; width: 22px; height: 2px; background: currentColor; }
.kicker--light { color: var(--aqua); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--muted); max-width: 62ch; }

/* Top bar + header */
.topbar { background: var(--ink); color: var(--on-dark-muted); font-size: .85rem; }
.topbar-in { display: flex; justify-content: space-between; gap: 16px; padding-top: 8px; padding-bottom: 8px; }
.topbar a { color: var(--on-dark); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.topbar a:hover { color: var(--aqua); }
.topbar-note, .topbar-links { display: inline-flex; align-items: center; gap: 6px 20px; flex-wrap: wrap; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .94); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.header-in { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 76px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand-text { display: flex; flex-direction: column; font-family: var(--font-head); line-height: 1.05; }
.brand-text strong { font-size: 1.08rem; font-weight: 700; letter-spacing: -.01em; }
.brand-text span { font-size: .78rem; font-weight: 500; letter-spacing: .28em; text-transform: uppercase; color: var(--teal); margin-top: 3px; }
.brand--light { color: #fff; }
.brand--light .brand-text span { color: var(--aqua); }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav > ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.site-nav li { position: relative; display: flex; align-items: center; }
.site-nav li > a { display: block; padding: 10px 12px; color: var(--text); font-weight: 500; font-size: .96rem; text-decoration: none; border-radius: 8px; }
.site-nav li > a:hover { color: var(--teal); }
.site-nav li.is-active > a { color: var(--teal); box-shadow: inset 0 -2px 0 var(--aqua); border-radius: 0; }
.sub-toggle { display: none; }
.sub { list-style: none; margin: 0; padding: 8px; position: absolute; top: 100%; left: 0; min-width: 270px; background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(6px); transition: .18s; }
.sub a { display: block; padding: 10px 12px; border-radius: 8px; color: var(--text); text-decoration: none; font-size: .95rem; }
.sub a:hover, .sub a[aria-current] { background: var(--tint); color: var(--teal); }
.site-nav li[data-sub]:hover .sub, .site-nav li[data-sub]:focus-within .sub { opacity: 1; visibility: visible; transform: none; }
.menu-btn { display: none; align-items: center; gap: 8px; min-height: 44px; padding: 8px 14px; background: none; border: 1px solid var(--line); border-radius: 999px; font: 600 .95rem var(--font-body); color: var(--ink); cursor: pointer; }
.menu-btn .i { width: 22px; height: 22px; }

/* Hero */
.hero { position: relative; background: radial-gradient(1200px 600px at 85% 20%, #164d63 0%, transparent 60%), linear-gradient(160deg, var(--ink) 0%, #082331 100%); color: var(--on-dark); overflow: hidden; }
.hero-grid-bg { position: absolute; inset: 0; background-image: linear-gradient(rgba(127, 223, 224, .07) 1px, transparent 1px), linear-gradient(90deg, rgba(127, 223, 224, .07) 1px, transparent 1px); background-size: 44px 44px; mask-image: linear-gradient(180deg, #000 30%, transparent 100%); }
.hero-in { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; padding-top: clamp(56px, 9vw, 110px); padding-bottom: clamp(56px, 9vw, 110px); }
.hero h1 { color: #fff; }
.hero .lead { color: var(--on-dark-muted); margin-bottom: 30px; }
.hero-art { margin: 0; position: relative; }
.rack { width: 100%; height: auto; filter: drop-shadow(0 30px 40px rgba(0, 0, 0, .35)); }
.flowline { animation: flow 1.6s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -40; } }
.hero-chip { position: absolute; left: 6%; bottom: -6px; display: inline-flex; align-items: center; gap: 10px; padding: 9px 14px; background: rgba(8, 35, 49, .85); border: 1px solid rgba(127, 223, 224, .25); border-radius: 999px; font: 500 .8rem var(--font-mono); color: var(--on-dark); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 4px rgba(154, 216, 168, .2); }

.strip { background: var(--ink-2); color: var(--on-dark); border-top: 1px solid rgba(127, 223, 224, .12); }
.strip-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; padding-top: 20px; padding-bottom: 20px; }
.strip-in span { display: inline-flex; align-items: center; gap: 10px; font-weight: 500; font-size: .95rem; }
.strip-in .i { width: 26px; height: 26px; color: var(--aqua); }

/* Page hero */
.page-hero { background: linear-gradient(160deg, var(--ink) 0%, #0d3446 100%); color: var(--on-dark); padding: clamp(40px, 7vw, 84px) 0 clamp(40px, 6vw, 72px); position: relative; overflow: hidden; }
.page-hero::after { content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px; border-radius: 50%; border: 60px solid rgba(46, 196, 198, .07); }
.page-hero h1 { color: #fff; max-width: 22ch; }
.page-hero .lead { color: var(--on-dark-muted); }
.page-hero--slim h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
.page-hero--404 { min-height: 56vh; display: flex; align-items: center; }
.crumbs { display: flex; flex-wrap: wrap; gap: 6px 8px; font: 500 .82rem var(--font-mono); color: var(--on-dark-muted); margin-bottom: 18px; }
.crumbs a { color: var(--on-dark); text-decoration: none; }
.crumbs a:hover { color: var(--aqua); }
.crumbs .sep { opacity: .5; }
.jump { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.jump a { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border: 1px solid rgba(230, 243, 245, .25); border-radius: 999px; color: var(--on-dark); text-decoration: none; font-size: .9rem; font-weight: 500; }
.jump a:hover { border-color: var(--aqua); color: #fff; }
.jump .i { color: var(--aqua); }

/* Sections */
.section { padding: clamp(56px, 8vw, 104px) 0; }
.tint { background: var(--tint); }
.section-head { max-width: 760px; margin-bottom: clamp(28px, 4vw, 48px); }
.section-head p { color: var(--muted); }
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(28px, 5vw, 72px); align-items: start; }
.split--center { align-items: center; }
.split > *, .split--media > * { min-width: 0; }
.prose p { color: var(--muted); }
.prose h3 { margin-top: 1.6em; }
.prose--narrow { max-width: 760px; }
.prose--narrow h2 { font-size: 1.4rem; margin-top: 1.8em; }

.pillars { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.pillars li { display: flex; gap: 16px; padding: 20px; background: var(--tint); border-radius: var(--radius); }
.pillars .i { width: 28px; height: 28px; color: var(--teal); margin-top: 2px; }
.pillars h3 { margin-bottom: .25em; }
.pillars p { margin: 0; color: var(--muted); font-size: .96rem; }

/* Cards */
.cards { display: grid; gap: 18px; }
.cards--2 { grid-template-columns: repeat(2, 1fr); }
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.cards--4 { grid-template-columns: repeat(4, 1fr); }
.card { display: flex; flex-direction: column; padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); color: var(--text); text-decoration: none; transition: transform .2s, box-shadow .2s, border-color .2s; }
a.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: transparent; color: var(--text); }
.card p { color: var(--muted); font-size: .96rem; }
.card--static p { margin: 0; }
.card-ico { display: inline-grid; place-items: center; width: 52px; height: 52px; border-radius: 12px; background: var(--tint); color: var(--teal); margin-bottom: 18px; }
.card-ico .i { width: 28px; height: 28px; }
.card-go { margin-top: auto; display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--teal); font-size: .92rem; }
.card--dark { background: var(--ink); border-color: var(--ink); }
.card--dark h3 { color: #fff; }
.card--dark p { color: var(--on-dark-muted); }
.card--dark .card-ico { background: rgba(46, 196, 198, .14); color: var(--aqua); }
.card--dark .card-go { color: var(--aqua); }
a.card--dark:hover { color: var(--on-dark); }

.feature { display: flex; gap: 22px; padding: 30px; background: var(--tint); border-radius: var(--radius); color: var(--text); text-decoration: none; transition: background .2s, box-shadow .2s; }
.feature:hover { background: #fff; box-shadow: var(--shadow); color: var(--text); }
.feature .card-ico { background: #fff; flex: none; }
.feature p { color: var(--muted); }

.bigcard { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; color: var(--text); text-decoration: none; transition: box-shadow .2s, transform .2s; }
.bigcard:hover { box-shadow: var(--shadow); transform: translateY(-3px); color: var(--text); }
.bigcard-art { background: linear-gradient(160deg, var(--ink), var(--ink-3)); color: var(--aqua); padding: 30px 40px; }
.bigcard-art svg { width: 100%; height: auto; max-height: 150px; }
.bigcard-body { padding: clamp(24px, 3vw, 36px); display: flex; flex-direction: column; flex: 1; }
.bigcard-body h2 { font-size: clamp(1.35rem, 2.4vw, 1.75rem); }
.bigcard-body p { color: var(--muted); }
.bigcard-body .link-arrow { margin-top: auto; padding-top: 10px; }

.ticks, .checklist, .link-list { list-style: none; margin: 0 0 1.4em; padding: 0; display: grid; gap: 10px; }
.ticks li, .checklist li { display: flex; gap: 10px; align-items: flex-start; }
.ticks .i, .checklist .i { color: var(--teal); margin-top: .25em; }
.ticks--2 { grid-template-columns: 1fr 1fr; }
.checklist li { padding: 12px 14px; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
.link-list a { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); text-decoration: none; font-weight: 500; }

.panel { background: var(--tint); border-radius: 18px; padding: clamp(22px, 3vw, 34px); }
.tint .panel { background: #fff; }
.panel--flat { margin-top: 20px; }
.panel--wide { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-top: 28px; }
.panel--wide p { margin: 0; color: var(--muted); }
.panel .checklist li { background: #fff; }
.tint .panel .checklist li { background: var(--tint); border-color: transparent; }
.facts { margin: 0 0 22px; display: grid; gap: 0; }
.facts div { display: grid; grid-template-columns: 90px 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.facts dt { font: 500 .78rem/1.6 var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.facts dd { margin: 0; font-weight: 500; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: s; }
.steps li { background: #fff; border-radius: var(--radius); padding: 28px; }
.steps p { color: var(--muted); margin: 0; }
.step-n { display: block; font: 500 .9rem var(--font-mono); color: var(--teal); margin-bottom: 18px; }

.partner { background: linear-gradient(160deg, var(--ink), var(--ink-3)); color: var(--on-dark); border-radius: 18px; padding: clamp(26px, 3vw, 38px); }
.partner h3 { color: #fff; font-size: 1.35rem; }
.partner p { color: var(--on-dark-muted); }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.data { width: 100%; border-collapse: collapse; font-size: .95rem; }
.data caption { text-align: left; padding: 14px 16px; font-family: var(--font-head); font-weight: 600; color: var(--ink); border-bottom: 1px solid var(--line); }
.data th, .data td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.data thead th { font: 500 .76rem var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); background: var(--tint); }
.data tbody th { font-weight: 600; color: var(--ink); }
.data tr:last-child > * { border-bottom: 0; }
.data--wide { min-width: 720px; }
.note { font-size: .92rem; color: var(--muted); margin-top: 14px; }

/* Diagrams */
.diagram { margin: 0; background: var(--tint); border-radius: 18px; padding: 24px; }
.diagram svg { width: 100%; height: auto; }
.diagram figcaption { margin-top: 10px; font-size: .9rem; color: var(--muted); }
.d-box { fill: #fff; stroke: var(--line); stroke-width: 2; }
.d-lab { font: 500 12px var(--font-mono); fill: var(--muted); letter-spacing: .1em; }
.d-unit rect { fill: var(--ink); }
.d-unit text { font: 600 13px var(--font-body); fill: #fff; text-anchor: middle; }
.d-flow { stroke: var(--aqua); stroke-width: 4; fill: none; stroke-dasharray: 8 6; animation: flow 1.6s linear infinite; }
.d-sm { font: 500 12px var(--font-mono); fill: var(--teal); }
.d-base { stroke: var(--muted); stroke-width: 3; fill: none; }

.flow { margin: 0 0 36px; }
.flow-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; counter-reset: f; }
.flow-steps li { display: flex; align-items: center; gap: 8px; }
.flow-steps li span { padding: 10px 14px; background: var(--ink); color: #fff; border-radius: 10px; font-weight: 500; font-size: .92rem; }
.flow-steps li:first-child span, .flow-steps li:last-child span { background: var(--aqua); color: var(--ink); }
.flow-steps li + li::before { content: ""; width: 18px; height: 2px; background: var(--aqua); }
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tech { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); border-top: 3px solid var(--aqua); }
.tech p { color: var(--muted); font-size: .96rem; margin: 0; }

/* FAQ */
.faq-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(28px, 5vw, 72px); }
.faq details { background: #fff; border-radius: 12px; margin-bottom: 10px; }
.faq summary { cursor: pointer; list-style: none; padding: 18px 52px 18px 20px; font-weight: 600; color: var(--ink); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); font: 400 1.5rem var(--font-head); color: var(--teal); }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 20px 18px; margin: 0; color: var(--muted); }

/* CTA */
.cta { background: radial-gradient(800px 400px at 90% 0%, #1b5d77 0%, transparent 60%), var(--ink); color: var(--on-dark); padding: clamp(52px, 7vw, 88px) 0; }
.cta-in { display: flex; justify-content: space-between; align-items: center; gap: 32px; }
.cta h2 { color: #fff; max-width: 22ch; }
.cta p { color: var(--on-dark-muted); max-width: 56ch; margin: 0; }
.cta .btn-row { flex: none; }

/* Calculators */
.calcs { display: grid; gap: 28px; }
.calc { border: 1px solid var(--line); border-radius: 18px; padding: clamp(20px, 3vw, 34px); background: #fff; }
.calc-head { display: flex; gap: 18px; align-items: flex-start; margin-bottom: 22px; }
.calc-head h2 { font-size: clamp(1.3rem, 2.4vw, 1.6rem); margin-bottom: .25em; }
.calc-head p { margin: 0; color: var(--muted); }
.calc-n { flex: none; display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px; background: var(--ink); color: var(--aqua); font: 500 .95rem var(--font-mono); }
.calc-body { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: start; }
.calc-in { display: grid; gap: 14px; }
.field { display: grid; gap: 6px; min-width: 0; }
.field label { font-weight: 600; font-size: .92rem; color: var(--ink); }
.field input, .field select, .field textarea { width: 100%; min-height: 48px; padding: 10px 14px; font: 400 1rem var(--font-body); color: var(--text); background: #fff; border: 1.5px solid var(--line); border-radius: 10px; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--teal); outline: none; box-shadow: 0 0 0 3px rgba(46, 196, 198, .25); }
.calc .field input { font-family: var(--font-mono); }
.field--pair { grid-template-columns: 1fr minmax(96px, 40%); column-gap: 8px; }
.field--pair label { grid-column: 1 / -1; }
.calc-out { margin: 0; background: var(--ink); color: var(--on-dark); border-radius: 14px; padding: 8px 20px; display: grid; align-content: start; }
.calc-out div { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 12px 0; border-bottom: 1px solid rgba(127, 223, 224, .14); }
.calc-out div:last-child { border-bottom: 0; }
.calc-out dt { color: var(--on-dark-muted); font-size: .92rem; }
.calc-out dd { margin: 0; font: 500 1.05rem var(--font-mono); color: #fff; text-align: right; }
.calc-out .big { flex-direction: column; align-items: flex-start; gap: 4px; padding: 16px 0; }
.calc-out .big dd { font-size: clamp(1.6rem, 3.5vw, 2.1rem); color: var(--aqua); text-align: left; }
.calc-out--list:empty { display: none; }
.calc-note { margin: 18px 0 0; font-size: .88rem; color: var(--muted); }
.calc-more { margin-top: 18px; }
.calc-more summary { cursor: pointer; font-weight: 600; color: var(--teal); margin-bottom: 12px; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(24px, 4vw, 56px); align-items: start; }
.contact-cards { display: grid; gap: 14px; }
.ccard { display: flex; gap: 16px; align-items: flex-start; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: var(--text); min-width: 0; }
a.ccard:hover { border-color: var(--teal); color: var(--text); }
.ccard > .i { width: 26px; height: 26px; color: var(--teal); margin-top: 3px; }
.ccard > div { min-width: 0; }
.ccard span { display: block; font: 500 .76rem var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 4px; }
.ccard strong { font-weight: 600; color: var(--ink); font-size: 1.05rem; }
.map-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; padding: 4px 0; }
.enquiry { background: var(--tint); border-radius: 18px; padding: clamp(22px, 3.5vw, 40px); display: grid; gap: 16px; }
.enquiry h2 { margin: 0; font-size: 1.6rem; }
.form-note, .form-small { margin: 0; color: var(--muted); font-size: .9rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-error { margin: 0; color: #a3251b; font-weight: 600; }
.enquiry .btn { justify-self: start; }

/* Footer */
.site-footer { background: #071f2b; color: var(--on-dark-muted); padding-top: 64px; font-size: .95rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.3fr; gap: 32px; padding-bottom: 44px; }
.footer-brand p { margin-top: 18px; max-width: 36ch; }
.footer-h { font: 500 .78rem var(--font-mono); text-transform: uppercase; letter-spacing: .12em; color: var(--aqua); margin: 6px 0 16px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site-footer a { color: var(--on-dark); text-decoration: none; }
.site-footer a:hover { color: var(--aqua); }
.site-footer address p { display: flex; gap: 10px; margin: 0 0 12px; min-width: 0; }
.site-footer address a { overflow-wrap: anywhere; }
.site-footer address .i { color: var(--aqua); margin-top: .3em; }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; padding-top: 20px; padding-bottom: 28px; border-top: 1px solid rgba(127, 223, 224, .12); font-size: .85rem; }

/* Video: background loops behind heroes, and inline framed loops */
.bgvid { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.bgvid video, .bgvid img { width: 100%; height: 100%; object-fit: cover; }
.bgvid::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8, 35, 49, .92) 0%, rgba(8, 35, 49, .78) 45%, rgba(8, 35, 49, .35) 100%), linear-gradient(0deg, rgba(8, 35, 49, .6), transparent 40%); }
.hero > .container, .page-hero > .container { position: relative; z-index: 1; }
.hero:has(.bgvid) .hero-grid-bg, .hero:has(.bgvid) .hero-art { display: none; }
.hero:has(.bgvid) .hero-in { min-height: min(78vh, 760px); }
.hero:has(.bgvid) .hero-in:not(.hero-in--quote) { grid-template-columns: minmax(0, 720px); }
.page-hero:has(.bgvid) { padding-top: clamp(64px, 10vw, 140px); padding-bottom: clamp(56px, 8vw, 110px); }
.page-hero:has(.bgvid)::after { display: none; }
.media { margin: 0; border-radius: 18px; overflow: hidden; background: var(--ink); aspect-ratio: 16 / 9; box-shadow: var(--shadow); }
.media video { width: 100%; height: 100%; object-fit: cover; }
.split--media { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 56px); align-items: center; margin-bottom: clamp(28px, 4vw, 48px); }
.split--media .section-head { margin-bottom: 0; }
.split--media:not(:has(> .media)) { grid-template-columns: 1fr; }
.stack { display: grid; gap: 20px; }

/* Landing page */
.muted { color: var(--muted); }
.hero-in--quote { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }
.hero-trust { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 8px; color: var(--on-dark); font-size: .95rem; }
.hero-trust li { display: flex; gap: 10px; align-items: center; }
.hero-trust .i { color: var(--aqua); }
.quick { background: rgba(8, 35, 49, .72); backdrop-filter: blur(14px) saturate(1.3); border: 1px solid rgba(127, 223, 224, .22); border-radius: 20px; padding: clamp(22px, 2.6vw, 30px); color: var(--on-dark); display: grid; gap: 16px; box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .5); }
.quick-h { color: #fff; font-size: 1.35rem; margin: 0; }
.quick-sub { margin: -8px 0 0; color: var(--on-dark-muted); font-size: .92rem; }
.quick-pick { border: 0; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.quick-pick legend { font-weight: 600; font-size: .9rem; margin-bottom: 8px; padding: 0; }
.quick-pick label { position: relative; cursor: pointer; }
.quick-pick input { position: absolute; opacity: 0; inset: 0; }
.quick-pick span { display: flex; align-items: center; gap: 8px; min-height: 48px; padding: 10px 12px; border: 1.5px solid rgba(127, 223, 224, .22); border-radius: 12px; font-weight: 500; font-size: .9rem; transition: .15s; }
.quick-pick .i { color: var(--aqua); width: 20px; height: 20px; }
.quick-pick input:checked + span { border-color: var(--aqua); background: rgba(46, 196, 198, .14); color: #fff; }
.quick-pick input:focus-visible + span { outline: 3px solid var(--aqua); outline-offset: 2px; }
.quick .field label { color: var(--on-dark); }
.quick .field input { background: rgba(255, 255, 255, .06); border-color: rgba(127, 223, 224, .22); color: #fff; }
.quick .field input::placeholder { color: var(--on-dark-muted); }
.quick .btn { width: 100%; }

.specs { background: var(--ink-2); color: var(--on-dark); border-top: 1px solid rgba(127, 223, 224, .12); }
.specs-in { display: grid; grid-template-columns: repeat(4, 1fr); }
.spec { padding: 26px 22px; border-left: 1px solid rgba(127, 223, 224, .14); }
.spec:first-child { border-left: 0; padding-left: 0; }
.spec strong { display: block; font: 600 clamp(1.4rem, 2.4vw, 1.9rem)/1.1 var(--font-head); color: #fff; letter-spacing: -.02em; }
.spec strong small { font-size: .55em; color: var(--aqua); font-weight: 600; }
.spec span { display: block; margin-top: 6px; font-size: .88rem; color: var(--on-dark-muted); }

.section-head--row { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; max-width: none; }
.section-head--row > div { max-width: 680px; }
.pgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pcard { position: relative; display: block; min-height: 360px; border-radius: 18px; overflow: hidden; color: #fff; text-decoration: none; background: var(--ink); isolation: isolate; }
.pcard--wide { grid-column: span 2; }
.pcard img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform .6s ease; }
.pcard::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(180deg, rgba(8, 35, 49, .05) 20%, rgba(8, 35, 49, .88) 78%); }
.pcard:hover img { transform: scale(1.05); }
.pcard:hover { color: #fff; }
.pcard-body { position: absolute; left: 0; right: 0; bottom: 0; padding: clamp(20px, 2.4vw, 28px); }
.pcard-tag { display: inline-block; font: 500 .72rem var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink); background: var(--aqua); padding: 4px 9px; border-radius: 999px; margin-bottom: 12px; }
.pcard h3 { color: #fff; font-size: 1.35rem; margin-bottom: .3em; }
.pcard p { color: var(--on-dark); font-size: .95rem; margin: 0 0 12px; max-width: 52ch; }
.pcard-go { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--aqua); font-size: .92rem; }

.pillars--2 { grid-template-columns: 1fr 1fr; margin: 24px 0 22px; }
.pillars--2 li { background: #fff; padding: 16px; gap: 12px; }
.pillars--2 h3 { font-size: 1rem; }
.pillars--2 p { font-size: .9rem; }
.photo-frame { position: relative; margin: 0; border-radius: 20px; overflow: hidden; aspect-ratio: 5 / 4; box-shadow: var(--shadow); }
.photo-frame img { width: 100%; height: 100%; object-fit: cover; object-position: 62% 50%; }
.photo-badge { position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 16px 18px; background: rgba(255, 255, 255, .94); border-radius: 14px; border-left: 4px solid var(--aqua); }
.photo-badge strong { display: block; font-family: var(--font-head); color: var(--ink); }
.photo-badge span { font-size: .9rem; color: var(--muted); }

.process { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; }
.process::before { content: ""; position: absolute; top: 28px; left: 28px; right: 25%; height: 2px; background: repeating-linear-gradient(90deg, var(--aqua) 0 8px, transparent 8px 14px); opacity: .6; }
.process li { position: relative; }
.process-ico { position: relative; display: grid; place-items: center; width: 56px; height: 56px; border-radius: 16px; background: var(--ink); color: var(--aqua); margin-bottom: 18px; }
.process-ico .i { width: 26px; height: 26px; }
.process-n { display: block; font: 500 .8rem var(--font-mono); color: var(--teal); margin-bottom: 6px; }
.process p { color: var(--muted); font-size: .95rem; margin: 0; }

.uses { position: relative; background: var(--ink); color: var(--on-dark); padding: clamp(56px, 8vw, 104px) 0; overflow: hidden; isolation: isolate; }
.uses-bg { position: absolute; inset: 0; z-index: -1; }
.uses-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .22; }
.uses-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, var(--ink) 0%, rgba(11, 42, 58, .7) 50%, var(--ink) 100%); }
.uses h2 { color: #fff; }
.uses .section-head p { color: var(--on-dark-muted); }
.uses-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.uses-grid li { padding: 22px; border: 1px solid rgba(127, 223, 224, .16); border-radius: 16px; background: rgba(8, 35, 49, .55); backdrop-filter: blur(6px); }
.uses-grid .i { width: 28px; height: 28px; color: var(--aqua); margin-bottom: 14px; }
.uses-grid h3 { color: #fff; font-size: 1.02rem; margin-bottom: .3em; }
.uses-grid p { color: var(--on-dark-muted); font-size: .9rem; margin: 0; }

.res-links { display: grid; gap: 12px; margin-top: 24px; }
.res-link { display: flex; align-items: center; gap: 16px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--text); transition: border-color .2s, box-shadow .2s; }
.res-link:hover { border-color: var(--teal); box-shadow: var(--shadow); color: var(--text); }
.res-link > .i:first-child { width: 28px; height: 28px; color: var(--teal); }
.res-link > .i:last-child { margin-left: auto; color: var(--teal); }
.res-link strong { display: block; color: var(--ink); }
.res-link small { display: block; font-size: .88rem; }
.calc--mini { box-shadow: var(--shadow); }
.calc--mini .calc-head { margin-bottom: 16px; }
.calc--mini .calc-head h3 { margin-bottom: 2px; }
.calc--mini .calc-n .i { width: 22px; height: 22px; }
.calc-in--2 { grid-template-columns: 1fr 1fr; margin-bottom: 16px; }
.calc-in--2 .field--unit { grid-column: 1 / -1; }
.calc-out--grid { grid-template-columns: 1fr 1fr; column-gap: 20px; }
.calc-out--grid .big { grid-column: 1 / -1; }
.calc-out--grid div:nth-last-child(-n+2) { border-bottom: 0; }

.partner-band { padding: clamp(40px, 5vw, 64px) 0; border-top: 1px solid var(--line); }
.partner-band-in { display: grid; grid-template-columns: auto 1fr auto; gap: clamp(20px, 3vw, 40px); align-items: center; }
.partner-mark { display: grid; place-items: center; width: 84px; height: 84px; border-radius: 22px; background: var(--tint); color: var(--teal); }
.partner-mark .i { width: 40px; height: 40px; }
.partner-band h2 { font-size: clamp(1.25rem, 2.2vw, 1.6rem); margin-bottom: .4em; }
.partner-band p { color: var(--muted); margin: 0; max-width: 70ch; }

.frp { background: var(--tint); border-radius: 18px; padding: clamp(22px, 3vw, 32px); margin-bottom: 28px; display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 24px; align-items: center; }
.frp-head { display: flex; gap: 16px; align-items: flex-start; }
.frp-head .card-ico { background: #fff; margin: 0; flex: none; }
.frp-head p { margin: 0; color: var(--muted); }
.frp .ticks { margin: 0; }
.sub-h { margin: 0 0 16px; font-size: 1.25rem; }

.reviewed { margin: 14px 0 0; font: 500 .82rem var(--font-mono); color: var(--on-dark-muted); }

.pgrid--3 .pcard { min-height: 400px; }
.res-links--3 { grid-template-columns: repeat(3, 1fr); margin-top: 0; }
.hero-btns { margin-top: 26px; }

/* Calculator results: animated panel, flow split, vessel rack, TDS scale */
.calc-res { position: relative; background: var(--ink); color: var(--on-dark); border-radius: 14px; overflow: hidden; align-self: start; }
.calc-res .calc-out { background: none; border-radius: 0; }
.calc-res::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(105deg, transparent 35%, rgba(127, 223, 224, .16) 50%, transparent 65%); transform: translateX(-100%); }
.calc-res.sweep::after { animation: sweep .75s ease-out; }
@keyframes sweep { to { transform: translateX(100%); } }
.calc-out div.bump dd { animation: bump .55s ease-out; }
@keyframes bump { 0% { color: #fff; text-shadow: 0 0 0 rgba(46, 196, 198, 0); } 35% { color: var(--aqua-2); text-shadow: 0 0 18px rgba(46, 196, 198, .75); } 100% { text-shadow: 0 0 0 rgba(46, 196, 198, 0); } }
.calc-out .big.bump dd { animation: bump-big .6s ease-out; }
@keyframes bump-big { 0% { transform: scale(1); } 30% { transform: scale(1.06); text-shadow: 0 0 22px rgba(46, 196, 198, .8); } 100% { transform: scale(1); } }
.calc-out dd { font-variant-numeric: tabular-nums; transform-origin: left center; }
.calc .field input, .calc .field select { transition: border-color .2s, box-shadow .25s, background-color .2s; }
.calc .field input:focus { background: #f6fcfc; animation: field-glow 2s ease-in-out infinite; }
@keyframes field-glow { 0%, 100% { box-shadow: 0 0 0 3px rgba(46, 196, 198, .22); } 50% { box-shadow: 0 0 0 6px rgba(46, 196, 198, .12); } }

.viz { padding: 4px 20px 20px; }
.viz.is-off { opacity: .35; }
.vs-bar { display: flex; height: 16px; border-radius: 999px; overflow: hidden; background: rgba(255, 255, 255, .06); gap: 3px; }
.vs-bar span { min-width: 6px; background-size: 22px 22px; animation: stripes 1.1s linear infinite; transition: flex-basis .8s cubic-bezier(.2, .8, .2, 1); }
.vs-p { flex: 0 0 calc(var(--r, .5) * 100% - 1.5px); background-image: repeating-linear-gradient(-45deg, var(--aqua) 0 6px, var(--aqua-2) 6px 11px); border-radius: 999px 0 0 999px; }
.vs-c { flex: 1 1 0; background-image: repeating-linear-gradient(-45deg, #f2b24c 0 6px, #f7cd85 6px 11px); border-radius: 0 999px 999px 0; }
@keyframes stripes { to { background-position: 22px 0; } }
.vs-legend { display: flex; justify-content: space-between; gap: 12px; margin-top: 10px; font-size: .84rem; color: var(--on-dark-muted); }
.vs-legend b { color: #fff; font: 500 .9rem var(--font-mono); margin-left: 4px; }
.vs-dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
.vs-dot--p { background: var(--aqua); }
.vs-dot--c { background: #f2b24c; }

.rack-grid { display: grid; gap: 6px; }
.rk-vessel { display: flex; gap: 3px; padding: 4px 6px; border: 1px solid rgba(127, 223, 224, .28); border-radius: 999px; animation: rk-in .45s cubic-bezier(.2, .8, .2, 1) backwards; animation-delay: calc(var(--i) * 55ms); }
.rk-el { flex: 1; height: 9px; border-radius: 999px; background: linear-gradient(90deg, var(--aqua), var(--aqua-2)); }
.rk-el--spare { background: none; box-shadow: inset 0 0 0 1px rgba(127, 223, 224, .45); }
@keyframes rk-in { from { opacity: 0; transform: translateX(-14px) scaleX(.92); } }
.rack-note { margin: 10px 0 0; font-size: .84rem; color: var(--on-dark-muted); }

.sc-bar { position: relative; height: 10px; border-radius: 999px; background: linear-gradient(90deg, var(--mint) 0 42.5%, var(--aqua) 42.5% 50%, #f2b24c 50% 75%, #e2725b 75%); }
.sc-mark { position: absolute; top: -6px; left: calc(var(--pos, 0) * 100%); width: 6px; height: 22px; margin-left: -3px; border-radius: 3px; background: #fff; box-shadow: 0 0 0 3px rgba(11, 42, 58, .9), 0 0 16px rgba(255, 255, 255, .7); transition: left .9s cubic-bezier(.2, .8, .2, 1); }
.sc-labels { position: relative; height: 20px; margin-top: 10px; font: 500 .72rem var(--font-mono); color: var(--on-dark-muted); text-transform: uppercase; letter-spacing: .06em; }
.sc-labels span { position: absolute; transform: translateX(-50%); white-space: nowrap; }
.sc-note { margin: 8px 0 0; font-size: .88rem; color: #fff; }

.cascade { animation: cascade .4s ease-out backwards; animation-delay: calc(var(--i) * 60ms); }
@keyframes cascade { from { opacity: 0; transform: translateY(8px); } }

/* Reveal on scroll (only when JS is running) */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .flowline, .d-flow, .vs-bar span, .rk-vessel, .cascade, .calc .field input:focus { animation: none; }
  .vs-bar span, .sc-mark { transition: none; }
}

/* Responsive */
@media (max-width: 1080px) {
  .cards--4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .site-nav { gap: 10px; }
  .site-nav li > a { padding: 10px 8px; font-size: .92rem; }
}
@media (max-width: 960px) {
  .menu-btn { display: inline-flex; }
  .site-header { backdrop-filter: none; background: #fff; }
  .site-nav { position: fixed; inset: 0 0 0 auto; top: 0; width: min(380px, 100%); height: 100dvh; flex-direction: column; align-items: stretch; gap: 20px; padding: 88px 20px 28px; background: #fff; box-shadow: -20px 0 50px rgba(11, 42, 58, .2); transform: translateX(100%); visibility: hidden; transition: transform .25s ease, visibility .25s; overflow-y: auto; }
  .nav-open .site-nav { transform: none; visibility: visible; }
  .nav-open .menu-btn { position: relative; z-index: 60; }
  .site-nav > ul { flex-direction: column; gap: 0; }
  .site-nav li { flex-wrap: wrap; border-bottom: 1px solid var(--line); }
  .site-nav li > a { flex: 1; padding: 14px 4px; font-size: 1.05rem; }
  .site-nav li.is-active > a { box-shadow: none; }
  .sub-toggle { display: grid; place-items: center; width: 44px; height: 44px; background: none; border: 0; color: var(--ink); cursor: pointer; }
  .sub-toggle svg { width: 16px; transition: transform .2s; }
  .sub-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
  .sub { position: static; width: 100%; min-width: 0; box-shadow: none; border: 0; padding: 0 0 10px 10px; opacity: 1; visibility: visible; transform: none; display: none; }
  .sub.is-open { display: block; }
  .site-nav li[data-sub]:hover .sub { display: none; }
  .site-nav li[data-sub]:hover .sub.is-open, .site-nav li[data-sub]:focus-within .sub.is-open { display: block; }
  .nav-cta { align-self: stretch; }
  .split--media { grid-template-columns: 1fr; }
  .frp { grid-template-columns: 1fr; }
  .pgrid--3 { grid-template-columns: 1fr 1fr; }
  .res-links--3 { grid-template-columns: 1fr; }
  .hero-in.hero-in--quote { grid-template-columns: 1fr; }
  .quick { max-width: 560px; }
  .specs-in { grid-template-columns: 1fr 1fr; }
  .spec:nth-child(3) { border-left: 0; padding-left: 0; }
  .spec { border-top: 1px solid rgba(127, 223, 224, .14); }
  .spec:nth-child(-n+2) { border-top: 0; }
  .pgrid { grid-template-columns: 1fr 1fr; }
  .process { grid-template-columns: 1fr 1fr; row-gap: 32px; }
  .process::before { display: none; }
  .uses-grid { grid-template-columns: 1fr 1fr; }
  .partner-band-in { grid-template-columns: 1fr; }
  .photo-frame { aspect-ratio: 4 / 3; }
  .hero-in, .split, .faq-wrap, .contact-grid, .calc-body { grid-template-columns: 1fr; }
  .hero-art { max-width: 560px; }
  .strip-in { grid-template-columns: 1fr 1fr; }
  .cards--3, .tech-grid, .steps { grid-template-columns: 1fr 1fr; }
  .cta-in { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .topbar-note { display: none; }
  .topbar-in { justify-content: center; }
  .topbar-links { justify-content: center; gap: 4px 16px; }
  .header-in { min-height: 66px; }
  .brand img { width: 38px; height: 38px; }
  .brand-text strong { font-size: .98rem; }
  .menu-btn span { display: none; }
  .cards--2, .cards--3, .cards--4, .tech-grid, .steps, .form-row, .ticks--2, .footer-grid { grid-template-columns: 1fr; }
  .strip-in { grid-template-columns: 1fr 1fr; font-size: .88rem; }
  .strip-in span { font-size: .86rem; }
  .feature { flex-direction: column; }
  .panel--wide { flex-direction: column; align-items: flex-start; }
  .btn-row .btn { flex: 1 1 auto; }
  .hero-chip { position: static; margin-top: 14px; }
  .facts div { grid-template-columns: 1fr; gap: 2px; }
  .calc-head { flex-direction: column; gap: 12px; }
  .field--pair { grid-template-columns: 1fr 1fr; }
  .flow-steps li + li::before { width: 10px; }
  .pgrid, .process, .pillars--2 { grid-template-columns: 1fr; }
  .pcard--wide { grid-column: auto; }
  .pcard { min-height: 320px; }
  .uses-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .uses-grid li { padding: 16px; }
  .section-head--row { flex-direction: column; align-items: flex-start; }
  .spec { padding: 18px 12px; }
  .spec:nth-child(odd) { padding-left: 0; }
  .calc-in--2 { grid-template-columns: 1fr; }
  .calc-out--grid { grid-template-columns: 1fr; }
  .calc-out--grid div:nth-last-child(2) { border-bottom: 1px solid rgba(127, 223, 224, .14); }
}
@media (max-width: 420px) {
  .uses-grid { grid-template-columns: 1fr; }
}