@font-face { font-family: "Archivo"; src: url("fonts/archivo-var.woff2") format("woff2"); font-weight: 100 900; font-stretch: 62% 125%; font-style: normal; font-display: swap; }
@font-face { font-family: "Public Sans"; src: url("fonts/public-sans-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Public Sans"; src: url("fonts/public-sans-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Public Sans"; src: url("fonts/public-sans-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/plex-mono-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/plex-mono-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }

/* Layout concept: light corporate pages framed by dark "asphalt" bands; a dashed
   road-marking line is the one recurring motif. Spec data set in mono like a test certificate. */
:root {
  --paper: #f3f5f8;
  --surface: #ffffff;
  --ink: #121a28;
  --muted: #556072;
  --line: #d5dbe4;
  --asphalt: #141b26;
  --asphalt-2: #223047;
  --on-dark: #eef2f7;
  --on-dark-muted: #a7b2c2;
  --accent: #56a0d7;          /* logo sky blue */
  --accent-deep: #17499f;     /* logo navy, for text and buttons on light */
  --accent-mid: #2975bb;      /* logo mid blue */
  --accent-ink: #0b1528;

  --f-display: "Archivo", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Public Sans", "Helvetica Neue", Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.3rem;
  --step-2: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  --step-3: clamp(2rem, 1.4rem + 2.6vw, 3.1rem);
  --step-4: clamp(2.6rem, 1.6rem + 4.6vw, 5rem);

  --gutter: clamp(16px, 4vw, 40px);
  --maxw: 1180px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: var(--step-0);
  line-height: 1.6;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

h1, h2, h3 {
  font-family: var(--f-display);
  font-stretch: 78%;
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); font-stretch: 85%; font-weight: 700; line-height: 1.2; }
p { margin: 0; }
.prose p + p { margin-top: 1em; }
.prose { max-width: 64ch; }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

.eyebrow {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: 0.9rem;
  display: block;
}
.dark .eyebrow { color: var(--accent); }

.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; z-index: 50; }
.skip:focus { left: 8px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 20;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; min-width: 0; }
.brand img { height: 52px; width: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.brand img + .brand-text { padding-left: 12px; border-left: 1px solid var(--line); }
.brand-text strong { font-family: var(--f-display); font-stretch: 80%; font-weight: 800; font-size: 1.2rem; color: var(--accent-deep); letter-spacing: 0.01em; }
.brand-text span { font-size: 0.72rem; color: var(--muted); letter-spacing: 0.06em; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 12px;
  border-bottom: 3px solid transparent;
}
.nav a:hover { color: var(--accent-deep); }
.nav a[aria-current="page"] { border-bottom-color: var(--accent); }
.nav .btn { margin-left: 8px; }
.nav-toggle { display: none; }

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex; align-items: center; gap: 8px;
    background: none; border: 1px solid var(--line); border-radius: 4px;
    font: 600 0.9rem var(--f-body); color: var(--ink); padding: 9px 12px; cursor: pointer;
  }
  .nav {
    display: none;
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 16px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav a[aria-current="page"] { border-bottom-color: var(--line); color: var(--accent-deep); }
  .nav .btn { margin: 14px 0 0; justify-content: center; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-body); font-weight: 700; font-size: 1rem;
  text-decoration: none; border-radius: 3px;
  padding: 14px 22px; border: 2px solid transparent; cursor: pointer;
  transition: background-color .15s, color .15s, border-color .15s;
}
.btn-primary { background: var(--accent-deep); color: #fff; }
.dark .btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--ink); color: var(--paper); }
.dark .btn-primary:hover { background: var(--on-dark); color: var(--asphalt); }
.btn-ghost { border-color: currentColor; color: inherit; }
.btn-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.dark .btn-ghost:hover { background: var(--on-dark); color: var(--asphalt); border-color: var(--on-dark); }
.nav .btn { padding: 10px 16px; border-bottom: 2px solid transparent; }
.btn svg { width: 18px; height: 18px; flex: none; }

/* ---------- Road marking motif ---------- */
.road-line {
  height: 10px;
  background:
    repeating-linear-gradient(115deg,
      var(--accent-deep) 0 70px, transparent 70px 82px,
      var(--accent-deep) 82px 152px, transparent 152px 164px,
      var(--accent) 164px 234px, transparent 234px 246px);
}

/* ---------- Sections ---------- */
.section { padding-block: clamp(56px, 8vw, 104px); }
.section-tight { padding-block: clamp(40px, 6vw, 72px); }
.dark { background: var(--asphalt); color: var(--on-dark); }
.dark .muted, .dark p.lede { color: var(--on-dark-muted); }
.muted { color: var(--muted); }
.lede { font-size: var(--step-1); line-height: 1.5; max-width: 52ch; }
.section-head { display: grid; gap: 14px; margin-bottom: clamp(32px, 4vw, 52px); max-width: 760px; }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(48px, 7vw, 96px) clamp(40px, 5vw, 64px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(28px, 4vw, 56px); align-items: center; }
.hero h1 { color: var(--on-dark); }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { margin-top: 22px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-figure { margin: 0; min-width: 0; }
.hero-figure figcaption, .fig-note {
  font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.06em;
  color: var(--on-dark-muted); margin-top: 8px; text-align: right;
}
.fig-note.on-light { color: var(--muted); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.page-hero { padding-block: clamp(48px, 7vw, 88px) clamp(36px, 5vw, 56px); }
.page-hero h1 { font-size: var(--step-3); max-width: 18ch; }
.page-hero .lede { margin-top: 18px; }

/* ---------- Facts strip ---------- */
.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--asphalt-2); }
.facts > div { padding: 22px 20px 4px 0; display: grid; gap: 4px; align-content: start; }
.facts dt { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--on-dark-muted); }
.facts dd { margin: 0; font-family: var(--f-display); font-stretch: 85%; font-weight: 700; font-size: 1.15rem; line-height: 1.25; }
@media (max-width: 760px) { .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ---------- Supply formats ---------- */
.formats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 2px solid var(--ink); }
.format { padding: 28px 28px 32px 0; display: grid; gap: 14px; align-content: start; min-width: 0; }
.format + .format { padding-left: 28px; border-left: 1px solid var(--line); }
.format .icon { width: 56px; height: 56px; color: var(--ink); }
.format a { font-weight: 700; color: var(--accent-deep); text-decoration-thickness: 2px; text-underline-offset: 4px; }
@media (max-width: 860px) {
  .formats { grid-template-columns: 1fr; }
  .format, .format + .format { padding: 26px 0; border-left: 0; }
  .format + .format { border-top: 1px solid var(--line); }
}

/* ---------- Grade chips (drum-stencil labels) ---------- */
.grade-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.grade {
  background: var(--surface); border: 1px solid var(--line); border-radius: 3px;
  padding: 20px 18px; display: grid; gap: 8px; align-content: start; min-width: 0;
  text-decoration: none; transition: border-color .15s, transform .15s;
}
a.grade:hover { border-color: var(--ink); transform: translateY(-2px); }
.grade .code {
  font-family: var(--f-display); font-stretch: 75%; font-weight: 800; font-size: 2rem; line-height: 1;
  letter-spacing: 0.02em;
}
.grade .std { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--muted); text-transform: uppercase; }
.grade p { font-size: 0.95rem; color: var(--muted); line-height: 1.5; }
.grade-family { font-family: var(--f-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; margin: 28px 0 12px; color: var(--muted); }
.grade-family:first-child { margin-top: 0; }
@media (max-width: 960px) { .grade-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 420px) { .grade-grid { grid-template-columns: 1fr; } }

/* ---------- Process (a real sequence) ---------- */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); counter-reset: step; list-style: none; margin: 0; padding: 0; }
.steps li { display: grid; gap: 12px; align-content: start; padding-top: 22px; border-top: 2px solid var(--accent); min-width: 0; }
.steps li::before {
  counter-increment: step; content: "Step " counter(step);
  font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent);
}
.steps p { color: var(--on-dark-muted); }
.light .steps p { color: var(--muted); }
.light .steps li::before { color: var(--accent-deep); }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

/* ---------- Two column feature ---------- */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: center; }
.split.top { align-items: start; }
.split > * { min-width: 0; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

.checklist { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 12px; }
.checklist li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 12px; align-items: start; }
.checklist li::before { content: ""; width: 14px; height: 6px; margin-top: 10px; background: var(--accent); }

.customers { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; margin: 0; padding: 0; }
.customers li { border: 1px solid var(--line); background: var(--surface); padding: 10px 16px; border-radius: 3px; font-weight: 600; font-size: 0.97rem; }
.dark .customers li { border-color: var(--asphalt-2); background: var(--asphalt-2); }

/* ---------- Spec tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--surface); border-radius: 3px; }
table.spec { width: 100%; border-collapse: collapse; font-size: 0.95rem; min-width: 560px; }
.spec caption { text-align: left; padding: 14px 16px; font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--line); }
.spec th, .spec td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec thead th { font-family: var(--f-display); font-stretch: 80%; font-size: 1.05rem; background: var(--paper); }
.spec td.num, .spec th.num { font-family: var(--f-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.spec tbody tr:last-child td, .spec tbody tr:last-child th { border-bottom: 0; }
.spec tbody th { font-weight: 600; }
@media (max-width: 600px) {
  table.spec { min-width: 0; font-size: 0.84rem; }
  .spec th, .spec td { padding: 10px 8px; }
  .spec thead th { font-size: 0.95rem; }
}
.note { font-size: 0.9rem; color: var(--muted); margin-top: 12px; max-width: 80ch; }

.grade-detail { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: clamp(18px, 3vw, 40px); padding-block: 28px; border-top: 1px solid var(--line); }
.grade-detail:last-of-type { border-bottom: 1px solid var(--line); }
.grade-detail .code { font-family: var(--f-display); font-stretch: 75%; font-weight: 800; font-size: 2.6rem; line-height: 1; }
.grade-detail .std { font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.08em; color: var(--muted); text-transform: uppercase; margin-top: 8px; display: block; }
.grade-detail h3 { margin-bottom: 8px; }
.grade-detail .uses { margin-top: 10px; color: var(--muted); }
.grade-detail .uses strong { color: var(--ink); }
@media (max-width: 640px) { .grade-detail { grid-template-columns: 1fr; } }

/* ---------- Product blocks ---------- */
.product { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(28px, 5vw, 64px); align-items: center; }
.product.flip > :first-child { order: 2; }
.product figure { margin: 0; background: var(--asphalt); border-radius: 3px; padding: clamp(16px, 3vw, 28px); }
.product figure .fig-note { color: var(--on-dark-muted); }
.kv { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 10px 22px; margin: 22px 0 0; }
.kv dt { font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); padding-top: 4px; }
.kv dd { margin: 0; }
@media (max-width: 860px) {
  .product { grid-template-columns: 1fr; }
  .product.flip > :first-child { order: 0; }
}
@media (max-width: 480px) { .kv { grid-template-columns: 1fr; gap: 2px 0; } .kv dd { margin-bottom: 10px; } }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 0; border-top: 2px solid var(--ink); max-width: 900px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 20px 40px 20px 0; position: relative;
  font-family: var(--f-display); font-stretch: 85%; font-weight: 700; font-size: 1.2rem; line-height: 1.3;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 16px; font-size: 1.6rem; font-weight: 400; color: var(--accent-deep); }
.faq details[open] summary::after { content: "–"; }
.faq .answer { padding: 0 0 22px; max-width: 70ch; color: var(--muted); }

/* ---------- Contact ---------- */
.contact-band .wrap { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: end; }
@media (max-width: 860px) { .contact-band .wrap { grid-template-columns: 1fr; } }
.email-line { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin-top: 16px; }
.email-line code { font-family: var(--f-mono); font-size: 1.05rem; user-select: all; word-break: break-all; }
.copy-btn { background: none; border: 1px solid currentColor; color: inherit; border-radius: 3px; padding: 6px 12px; font: 600 0.85rem var(--f-body); cursor: pointer; }
.copy-btn:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: 3px; padding: clamp(22px, 3vw, 36px); display: grid; gap: 22px; }
.contact-card address { font-style: normal; line-height: 1.6; }
.contact-card .label { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 6px; }
.enquiry-list { margin: 14px 0 0; padding-left: 1.2em; display: grid; gap: 6px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--asphalt); color: var(--on-dark-muted); font-size: 0.92rem; }
.site-footer .wrap { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr)); gap: 32px; padding-block: 52px 36px; }
.footer-logo { width: 92px; height: auto; background: #fff; padding: 8px; border-radius: 3px; margin-bottom: 18px; }
.site-footer h2 { font-size: 1.05rem; font-stretch: 85%; color: var(--on-dark); margin-bottom: 12px; }
.site-footer a { color: var(--on-dark); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer address { font-style: normal; }
.legal { border-top: 1px solid var(--asphalt-2); }
.legal .wrap { display: flex; flex-wrap: wrap; gap: 8px 28px; padding-block: 18px; font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.04em; }
@media (max-width: 760px) { .site-footer .wrap { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

@media (max-width: 380px) { .brand img + .brand-text { display: none; } }