/* ==========================================================================
   STEELMAN PIPING SOLUTIONS — main.css
   Dark-only industrial system. Two surface families (navy = story,
   gunmetal = data). No white anywhere. 2px radius. Hairlines over shadows.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1 · FONTS  (self-hosted WOFF2, latin subset)
   -------------------------------------------------------------------------- */
@font-face {
  font-family: 'Archivo Expanded';
  src: url('../fonts/archivo-expanded-600.woff2') format('woff2');
  font-weight: 600; font-style: normal; font-stretch: 125%; font-display: swap;
}
@font-face {
  font-family: 'Archivo Expanded';
  src: url('../fonts/archivo-expanded-700.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-stretch: 125%; font-display: swap;
}
@font-face {
  font-family: 'Inter Tight';
  src: url('../fonts/inter-tight-400.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Inter Tight';
  src: url('../fonts/inter-tight-500.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('../fonts/ibm-plex-mono-400.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('../fonts/ibm-plex-mono-500.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}

/* --------------------------------------------------------------------------
   2 · TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* ── SURFACE FAMILY 1 · NAVY (brand) ── */
  --navy-950: #010D22;
  --navy-900: #011837;
  --navy-800: #02234E;
  --navy-700: #06305F;
  --navy-600: #0C4681;

  /* ── SURFACE FAMILY 2 · GUNMETAL (machined steel) ── */
  --gun-900: #12171D;
  --gun-800: #1A2128;
  --gun-700: #232C35;
  --gun-600: #2F3A45;
  --gun-500: #3D4A57;

  /* ── TEXT ── */
  --text-hi: #E9EEF5;
  --text-mid: #A9B6C6;
  /* The brief specifies #6F7E90 here and also flags the risk of slipping under
     4.5:1 on a dark site. It does slip: text-low carries captions, table
     headers and mono meta at 10-13px, which WCAG treats as body text, and
     #6F7E90 measures 3.4:1 on gun-700 and 3.7:1 on navy-800. Lightened to the
     nearest value that clears 4.5:1 on every surface it is used on while
     keeping three clearly separated tonal steps. */
  --text-low: #8E99A8;

  /* ── ACCENTS ── */
  --cyan-400: #71CBE3;
  --cyan-600: #2E9CBE;
  --amber-400: #FF8A2B;
  --amber-600: #C55A00;

  /* ── WELD (forming sequence only) ── */
  --weld-hot: #FFF3D6;
  --weld-mid: #FF7A18;
  --weld-cool: #8C2A00;

  /* ── SILVER ── */
  --steel-200: #CECECE;
  --steel-300: #D7D6D4;

  /* ── TYPE ── */
  --font-display: 'Archivo Expanded', 'Archivo', 'Arial Black', system-ui, sans-serif;
  --font-body: 'Inter Tight', 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', 'Cascadia Mono', Consolas, monospace;

  /* ── RHYTHM ── */
  --max: 1320px;
  --gut: 24px;
  --radius: 2px;
  --rule: 1px;

  /* ── MOTION ── */
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --t-fast: 180ms;
  --t-slow: 600ms;

  /* ── HAIRLINES (per surface family; sections override) ── */
  --hair: rgba(113, 203, 227, 0.14);
  --hair-strong: rgba(113, 203, 227, 0.28);

  --header-h: 72px;
}

@media (min-width: 900px) {
  :root { --gut: 48px; --header-h: 84px; }
}

/* --------------------------------------------------------------------------
   3 · RESET & BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--navy-900);
  color: var(--text-hi);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

img, video, svg, canvas { display: block; max-width: 100%; }
img, video { height: auto; }

a { color: inherit; text-decoration: none; }

button, input, select, textarea { font: inherit; color: inherit; }

h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }

table { border-collapse: collapse; width: 100%; }

hr { border: 0; border-top: var(--rule) solid var(--hair); margin: 0; }

::selection { background: var(--cyan-600); color: var(--navy-950); }

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
  border-radius: var(--radius);
}

.skip-link {
  position: absolute; top: -100px; left: var(--gut); z-index: 200;
  background: var(--navy-800); color: var(--text-hi);
  border: var(--rule) solid var(--cyan-400); border-radius: var(--radius);
  padding: 12px 20px; font-family: var(--font-mono); font-size: 0.8125rem;
  letter-spacing: 0.02em; text-transform: uppercase;
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: 16px; }

.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;
}

/* --------------------------------------------------------------------------
   4 · TYPOGRAPHY
   -------------------------------------------------------------------------- */
.h1, .h2, .h3, .h4 {
  font-family: var(--display-face, var(--font-display));
  font-stretch: 125%;
  font-weight: 700;
  color: var(--text-hi);
  text-wrap: balance;
}

.h1 { font-size: clamp(2.75rem, 6vw, 5rem);       line-height: 0.98; letter-spacing: -0.025em; }
.h2 { font-size: clamp(2rem, 4vw, 3.25rem);       line-height: 1.05; letter-spacing: -0.02em; }
.h3 { font-size: clamp(1.375rem, 2.2vw, 1.75rem); line-height: 1.2;  letter-spacing: -0.01em; font-weight: 600; }
.h4 { font-size: 1.0625rem; line-height: 1.3; letter-spacing: -0.005em; font-weight: 600; }

.lead {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.6;
  color: var(--text-mid);
  text-wrap: pretty;
}

.prose p { color: var(--text-mid); margin-bottom: 1.15em; text-wrap: pretty; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--text-hi); font-weight: 500; }

/* Mono is load-bearing: every grade, dimension and standard sits in it. */
.mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  letter-spacing: 0.02em;
  font-weight: 400;
}
.mono--up { text-transform: uppercase; }
.mono--cy { color: var(--cyan-400); }
.mono--am { color: var(--amber-400); }
.mono--lo { color: var(--text-low); }

/* Inline spec inside body copy — the brief mandates mono for every alphanumeric spec. */
.spec {
  font-family: var(--font-mono);
  font-size: 0.9em;
  letter-spacing: 0.01em;
  color: var(--text-hi);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   5 · LAYOUT
   -------------------------------------------------------------------------- */
.wrap { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: var(--gut); }
.wrap--narrow { max-width: 860px; }

.section { padding-block: clamp(72px, 9vw, 140px); position: relative; }
.section--tight { padding-block: clamp(48px, 5vw, 80px); }
.section--flush { padding-block: 0; }

.grid { display: grid; gap: clamp(24px, 3vw, 48px); }

/* Asymmetric splits — 6/6 reads as a template, so this system never uses it. */
@media (min-width: 900px) {
  .grid--5-7 { grid-template-columns: 5fr 7fr; }
  .grid--7-5 { grid-template-columns: 7fr 5fr; }
  .grid--4-8 { grid-template-columns: 4fr 8fr; }
  .grid--8-4 { grid-template-columns: 8fr 4fr; }
  .grid--3   { grid-template-columns: repeat(3, 1fr); }
  .grid--2   { grid-template-columns: repeat(2, 1fr); }
  .grid--4   { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 600px) and (max-width: 899px) {
  .grid--3, .grid--2, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

.stack > * + * { margin-top: var(--stack, 24px); }

/* --------------------------------------------------------------------------
   6 · SURFACE FAMILIES
   Navy = story. Gunmetal = data. Each family carries its own texture so the
   buyer learns the difference without being told.
   -------------------------------------------------------------------------- */
.surf { position: relative; isolation: isolate; }

.surf--navy-950 { background-color: var(--navy-950); }
.surf--navy-900 { background-color: var(--navy-900); }
.surf--navy-800 { background-color: var(--navy-800); }

/* Navy surfaces get atmosphere: a soft off-centre light, like a mill floor at night. */
.surf--navy-950::before,
.surf--navy-900::before,
.surf--navy-800::before {
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(120% 90% at 18% 0%, rgba(12, 70, 129, 0.30), transparent 62%),
    radial-gradient(80% 70% at 100% 100%, rgba(1, 13, 34, 0.85), transparent 60%);
}

/* Gunmetal surfaces get ruled hairlines — the texture of a mill test certificate. */
.surf--gun-900,
.surf--gun-800 { background-color: var(--gun-800); }
.surf--gun-900 { background-color: var(--gun-900); }

.surf--gun-900::before,
.surf--gun-800::before {
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(233, 238, 245, 0.030) 0 1px,
    transparent 1px 32px
  );
  -webkit-mask-image: radial-gradient(130% 100% at 50% 0%, #000 30%, transparent 92%);
          mask-image: radial-gradient(130% 100% at 50% 0%, #000 30%, transparent 92%);
}

/* Hairline tokens switch with the family so borders always sit right. */
.surf--gun-900, .surf--gun-800 {
  --hair: rgba(233, 238, 245, 0.10);
  --hair-strong: rgba(233, 238, 245, 0.20);
  --card-bg: var(--gun-700);
  --card-border: var(--gun-600);
}
.surf--navy-950, .surf--navy-900, .surf--navy-800 {
  --hair: rgba(113, 203, 227, 0.15);
  --hair-strong: rgba(113, 203, 227, 0.30);
  --card-bg: var(--navy-700);
  --card-border: var(--navy-600);
}

.rule-top { border-top: var(--rule) solid var(--hair); }
.rule-bot { border-bottom: var(--rule) solid var(--hair); }

/* --------------------------------------------------------------------------
   7 · STRUCTURAL DEVICES
   Diagonal corner ticks (top-left + bottom-right) stand in for full boxes —
   the crop marks on a dimensioned drawing rather than a SaaS card border.
   -------------------------------------------------------------------------- */
.ticks { position: relative; }
.ticks::before, .ticks::after {
  content: ''; position: absolute; width: 12px; height: 12px; pointer-events: none;
  border-color: var(--cyan-400); opacity: 0.55;
  transition: opacity var(--t-fast) var(--ease);
}
.ticks::before { top: -1px; left: -1px;  border-top: var(--rule) solid; border-left: var(--rule) solid; }
.ticks::after  { bottom: -1px; right: -1px; border-bottom: var(--rule) solid; border-right: var(--rule) solid; }

/* Eyebrow: mono label led by a hairline, like a drawing annotation leader. */
.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--cyan-400);
  margin-bottom: 20px;
}
.eyebrow::before {
  content: ''; width: 28px; height: var(--rule); flex: none;
  background: currentColor; opacity: 0.6;
}
.eyebrow--am { color: var(--amber-400); }

.section-head { max-width: 760px; margin-bottom: clamp(40px, 5vw, 72px); }
.section-head .lead { margin-top: 20px; }

/* Mono chip — the atom of every grade list on the site. */
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.02em;
  color: var(--text-mid); background: rgba(233, 238, 245, 0.035);
  border: var(--rule) solid var(--hair); border-radius: var(--radius);
  padding: 5px 10px 5px 8px; white-space: nowrap;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease);
}
.chip::before {
  content: ''; width: 3px; height: 3px; flex: none; background: var(--cyan-400);
  opacity: 0.7;
}
.chip-set { display: flex; flex-wrap: wrap; gap: 6px; }
a.chip:hover, a.chip:focus-visible { color: var(--text-hi); border-color: var(--hair-strong); }
.chip.is-match { color: var(--amber-400); border-color: rgba(255, 138, 43, 0.45); background: rgba(255, 138, 43, 0.08); }
.chip.is-match::before { background: var(--amber-400); }
.chip.is-hidden { display: none; }

/* Stat / figure pair — display numeral over a mono label. Never invented data. */
.figpair { display: flex; flex-direction: column; gap: 4px; }
.figpair__n { font-family: var(--font-display); font-stretch: 125%; font-weight: 700; font-size: 1.5rem; letter-spacing: -0.01em; }
.figpair__l { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-low); }

/* --------------------------------------------------------------------------
   8 · BUTTONS & LINKS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-mono); font-size: 0.8125rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 15px 26px; border-radius: var(--radius); border: var(--rule) solid transparent;
  cursor: pointer; text-align: center;
  transition: background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}
.btn__arrow { transition: transform var(--t-fast) var(--ease); }
.btn:hover .btn__arrow, .btn:focus-visible .btn__arrow { transform: translateX(4px); }

.btn--primary {
  background: var(--cyan-400); color: var(--navy-950); border-color: var(--cyan-400);
}
.btn--primary:hover, .btn--primary:focus-visible { background: var(--cyan-600); border-color: var(--cyan-600); color: var(--navy-950); }

.btn--ghost { border-color: var(--hair-strong); color: var(--text-hi); background: transparent; }
.btn--ghost:hover, .btn--ghost:focus-visible { border-color: var(--cyan-400); color: var(--cyan-400); }

.btn--block { display: flex; width: 100%; }

/* Text link with a sliding rule — the site's only decorative link treatment. */
.tlink {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 0.8125rem; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--cyan-400);
  padding-bottom: 6px; position: relative;
}
.tlink::after {
  content: ''; position: absolute; left: 0; bottom: 0; height: var(--rule); width: 100%;
  background: currentColor; opacity: 0.35;
  transform-origin: left; transform: scaleX(0.34);
  transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.tlink:hover::after, .tlink:focus-visible::after { transform: scaleX(1); opacity: 0.8; }
.tlink svg { transition: transform var(--t-fast) var(--ease); }
.tlink:hover svg, .tlink:focus-visible svg { transform: translateX(4px); }

.ilink { color: var(--cyan-400); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: rgba(113,203,227,0.4); transition: text-decoration-color var(--t-fast) var(--ease); }
.ilink:hover { text-decoration-color: var(--cyan-400); }

/* --------------------------------------------------------------------------
   9 · HEADER
   -------------------------------------------------------------------------- */
.hdr {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  background: transparent;
  border-bottom: var(--rule) solid transparent;
  transition: background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
}
.hdr.is-solid {
  background: var(--navy-950);
  border-bottom-color: var(--navy-600);
  box-shadow: 0 12px 32px rgba(1, 13, 34, 0.6);
}
.hdr.is-open { background: var(--navy-950); border-bottom-color: var(--navy-600); }

.hdr__in {
  height: 100%; display: flex; align-items: center; gap: 24px;
  max-width: var(--max); margin-inline: auto; padding-inline: var(--gut);
}

.hdr__brand { display: flex; align-items: center; gap: 12px; flex: none; }
.hdr__mark { width: 34px; height: 34px; flex: none; }
.hdr__word {
  font-family: var(--font-display); font-stretch: 125%; font-weight: 700;
  font-size: 1.0625rem; letter-spacing: 0.02em; color: var(--text-hi);
  line-height: 1;
}
.hdr__word span { display: block; font-family: var(--font-mono); font-weight: 400; font-size: 0.5625rem; letter-spacing: 0.24em; color: var(--cyan-400); margin-top: 4px; }

.hdr__nav { display: none; margin-left: auto; }
.hdr__actions { display: none; margin-left: 20px; }

@media (min-width: 1080px) {
  .hdr__nav { display: flex; align-items: center; gap: 4px; height: 100%; }
  .hdr__actions { display: flex; align-items: center; gap: 12px; }
}

.nav__item { position: relative; height: 100%; display: flex; align-items: center; }

.nav__link {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 400;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-mid);
  padding: 10px 14px; border-radius: var(--radius); background: none; border: 0; cursor: pointer;
  transition: color var(--t-fast) var(--ease);
}
.nav__link:hover, .nav__link:focus-visible { color: var(--text-hi); }
.nav__link[aria-expanded="true"] { color: var(--cyan-400); }
.nav__item.is-current > .nav__link { color: var(--cyan-400); }

.nav__caret { width: 8px; height: 8px; opacity: 0.6; transition: transform var(--t-fast) var(--ease); }
.nav__link[aria-expanded="true"] .nav__caret { transform: rotate(180deg); }

/* Mega panel */
.mega {
  position: absolute; top: 100%; left: 50%; transform: translate(-50%, -6px);
  background: var(--navy-950); border: var(--rule) solid var(--navy-600);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(1, 13, 34, 0.75);
  padding: 28px; opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), visibility var(--t-fast);
}
.nav__item.is-open .mega { opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, 0); }

.mega--wide { width: min(880px, calc(100vw - 48px)); }
.mega--mid  { width: min(660px, calc(100vw - 48px)); }
.mega--slim { width: min(340px, calc(100vw - 48px)); }

.mega__grid { display: grid; gap: 4px 28px; }
.mega--wide .mega__grid { grid-template-columns: repeat(2, 1fr); }
.mega--mid  .mega__grid { grid-template-columns: repeat(3, 1fr); }

.mega__head {
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-low);
  padding-bottom: 12px; margin-bottom: 12px; border-bottom: var(--rule) solid var(--navy-600);
  grid-column: 1 / -1;
}

.mega__link {
  display: flex; gap: 14px; align-items: center;
  padding: 10px; border-radius: var(--radius);
  border: var(--rule) solid transparent;
  transition: background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.mega__link:hover, .mega__link:focus-visible { background: var(--navy-800); border-color: var(--navy-600); }
.mega__thumb {
  width: 52px; height: 39px; flex: none; object-fit: cover;
  border-radius: var(--radius); border: var(--rule) solid var(--navy-600);
  background: var(--navy-800); filter: saturate(0.8) contrast(1.05);
}
.mega__t { font-size: 0.9375rem; font-weight: 500; color: var(--text-hi); line-height: 1.3; }
.mega__d { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.02em; color: var(--text-low); margin-top: 3px; line-height: 1.4; }

/* Brochure action — inner pages only. The homepage carries the WhatsApp float
   and nothing else, so one body class flips this everywhere at once. */
.hdr__brochure, .drawer__brochure { display: none; }
body.has-brochure-cta .hdr__brochure { display: inline-flex; }
body.has-brochure-cta .drawer__brochure { display: flex; }

/* Burger */
.burger {
  display: inline-flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; margin-left: auto; padding: 0 10px;
  background: none; border: 0; cursor: pointer; border-radius: var(--radius);
}
.burger span { display: block; height: 1.5px; background: var(--text-hi); transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease); }
.burger span:nth-child(1) { width: 24px; }
.burger span:nth-child(2) { width: 18px; }
.burger span:nth-child(3) { width: 24px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { width: 24px; transform: translateY(-6.5px) rotate(-45deg); }
@media (min-width: 1080px) { .burger { display: none; } }

/* Mobile drawer */
.drawer {
  position: fixed; inset: var(--header-h) 0 0 0; z-index: 99;
  background: var(--navy-950);
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), visibility var(--t-fast);
  padding: 8px var(--gut) 64px;
}
.drawer.is-open { opacity: 1; visibility: visible; transform: none; }
@media (min-width: 1080px) { .drawer { display: none; } }

.drawer__group { border-bottom: var(--rule) solid var(--navy-600); }
.drawer__toggle,
.drawer__solo {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  width: 100%; min-height: 56px; padding: 8px 4px;
  background: none; border: 0; cursor: pointer; text-align: left;
  font-family: var(--font-mono); font-size: 0.8125rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-hi);
}
.drawer__toggle .nav__caret { width: 10px; height: 10px; }
.drawer__toggle[aria-expanded="true"] { color: var(--cyan-400); }
.drawer__toggle[aria-expanded="true"] .nav__caret { transform: rotate(180deg); }
.drawer__panel { display: none; padding: 0 4px 16px; }
.drawer__panel.is-open { display: block; }
.drawer__panel a {
  display: block; min-height: 48px; padding: 12px 0 12px 16px;
  color: var(--text-mid); font-size: 0.9375rem;
  border-left: var(--rule) solid var(--navy-600);
}
.drawer__panel a:hover, .drawer__panel a:focus-visible { color: var(--cyan-400); border-left-color: var(--cyan-400); }
.drawer__foot { margin-top: 28px; display: grid; gap: 10px; }

/* --------------------------------------------------------------------------
   10 · FOOTER
   -------------------------------------------------------------------------- */
.ftr { background: var(--navy-900); border-top: var(--rule) solid var(--navy-600); position: relative; }
.ftr__top { display: grid; gap: 44px; padding-block: clamp(56px, 7vw, 88px); }
@media (min-width: 900px) { .ftr__top { grid-template-columns: 4fr 8fr; gap: 64px; } }

.ftr__logo { width: 148px; height: auto; }
.ftr__tag { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em; color: var(--text-low); margin-top: 18px; max-width: 32ch; line-height: 1.6; }

.ftr__cols { display: grid; gap: 32px; }
@media (min-width: 560px) { .ftr__cols { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1080px) { .ftr__cols { grid-template-columns: repeat(4, 1fr); } }

.ftr__h {
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cyan-400);
  padding-bottom: 12px; margin-bottom: 14px; border-bottom: var(--rule) solid var(--navy-600);
}
.ftr__cols li + li { margin-top: 9px; }
.ftr__cols a { font-size: 0.9375rem; color: var(--text-mid); transition: color var(--t-fast) var(--ease); }
.ftr__cols a:hover, .ftr__cols a:focus-visible { color: var(--cyan-400); }

.ftr__contact { display: grid; gap: 24px; padding-block: 36px; border-top: var(--rule) solid var(--navy-600); }
@media (min-width: 760px) { .ftr__contact { grid-template-columns: repeat(3, 1fr); } }
.ftr__person .h4 { margin-bottom: 8px; }
.ftr__person a { display: block; font-family: var(--font-mono); font-size: 0.8125rem; color: var(--text-mid); line-height: 1.8; }
.ftr__person a:hover { color: var(--cyan-400); }

.ftr__certs { display: flex; flex-wrap: wrap; gap: 8px; padding-block: 24px; border-top: var(--rule) solid var(--navy-600); }

.ftr__legal {
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
  padding-block: 24px 32px; border-top: var(--rule) solid var(--navy-600);
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.04em; color: var(--text-low);
}
.ftr__legal a { color: var(--text-mid); }
.ftr__legal a:hover { color: var(--cyan-400); }

/* --------------------------------------------------------------------------
   11 · WHATSAPP FLOAT  (the only float on the site — client rule 3)
   -------------------------------------------------------------------------- */
.wa {
  position: fixed; right: 24px; bottom: 24px; z-index: 90;
  width: 56px; height: 56px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--navy-800); border: var(--rule) solid var(--cyan-400);
  box-shadow: 0 10px 28px rgba(1, 13, 34, 0.7);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease),
              visibility var(--t-slow), background-color var(--t-fast) var(--ease);
}
.wa.is-in { opacity: 1; visibility: visible; transform: none; }
.wa.is-raised { transform: translateY(-88px); }
.wa:hover, .wa:focus-visible { background: var(--navy-700); }
.wa svg { width: 27px; height: 27px; fill: var(--text-hi); }

/* --------------------------------------------------------------------------
   12 · CARDS
   -------------------------------------------------------------------------- */
.card {
  position: relative; display: flex; flex-direction: column;
  background: var(--card-bg); border: var(--rule) solid var(--card-border);
  border-radius: var(--radius); overflow: hidden;
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.card::after {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: rgba(233, 238, 245, 0.06); pointer-events: none;
}
a.card:hover, a.card:focus-visible { border-color: var(--cyan-400); }

.card__media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--navy-950); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow) var(--ease); }
a.card:hover .card__media img, a.card:focus-visible .card__media img { transform: scale(1.03); }

.card__body { padding: 22px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.card__t { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; }
.card__d { font-size: 0.9375rem; color: var(--text-mid); line-height: 1.55; }
.card__arrow { flex: none; color: var(--cyan-400); transition: transform var(--t-fast) var(--ease); }
a.card:hover .card__arrow, a.card:focus-visible .card__arrow { transform: translateX(4px); }
.card__foot { margin-top: auto; padding-top: 6px; }

.card--wide { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .card--wide { flex-direction: row; }
  .card--wide .card__media { aspect-ratio: auto; width: 42%; flex: none; }
  .card--wide .card__body { padding: 32px; justify-content: center; }
}

/* ── Photography treatment (brief §7) ──────────────────────────────────────
   Three cases, because the supplied shots fall into three kinds.

   1 · CUT OUT — studio shots keyed to transparent. The metal sits directly on
       the section surface with a soft elliptical contact shadow beneath it.
       This is the expensive-looking one, so it goes on the hero shots. */
.card__media--cut {
  background:
    radial-gradient(58% 46% at 50% 42%, rgba(12, 70, 129, 0.30), transparent 70%),
    var(--navy-950);
  display: grid; place-items: center; padding: 7%;
}
.img--cut {
  width: 100%; height: 100%; object-fit: contain;
  filter: drop-shadow(0 18px 22px rgba(1, 13, 34, 0.75)) contrast(1.06) saturate(0.9);
}
a.card:hover .img--cut, a.card:focus-visible .img--cut { transform: scale(1.03); }

/* 2 · SCRIM — shot on tarpaulin, paper or a shadowed bench, where backdrop and
      steel are the same tone and no key can separate them. Cool grade, contrast
      lift, and a vignette that dissolves the edges into the section surface. */
.img--onwhite { filter: brightness(0.70) contrast(1.26) saturate(0.68); }
.card__media--onwhite { background: var(--navy-950); }
.card__media--onwhite::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(66% 60% at 50% 44%, transparent 0%, rgba(1, 13, 34, 0.34) 62%, rgba(1, 13, 34, 0.92) 100%),
    linear-gradient(to bottom, rgba(2, 35, 78, 0.24), rgba(1, 13, 34, 0.62));
}
/* 3 · GRADED — already on a dark or neutral backdrop. Vignette plus a cool
      grade so shots taken in different light read as one set. */
.img--graded { filter: saturate(0.86) contrast(1.08) brightness(0.94); }
.media-vignette { position: relative; }
.media-vignette::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(78% 70% at 50% 45%, transparent 42%, rgba(1, 13, 34, 0.62) 100%),
    linear-gradient(to bottom, rgba(2, 35, 78, 0.10), rgba(1, 13, 34, 0.28));
}

/* Pillar / step / industry tiles */
.tile {
  position: relative; display: flex; flex-direction: column; gap: 14px;
  padding: 28px 24px; border: var(--rule) solid var(--hair); border-radius: var(--radius);
  background: rgba(233, 238, 245, 0.018);
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
a.tile:hover, a.tile:focus-visible { border-color: var(--cyan-400); background: rgba(113, 203, 227, 0.05); }
.tile__ico { width: 34px; height: 34px; color: var(--cyan-400); }
.tile__n {
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.14em;
  color: var(--text-low);
}
.tile__d { font-size: 0.9375rem; color: var(--text-mid); line-height: 1.55; }

/* --------------------------------------------------------------------------
   13 · TABLES
   -------------------------------------------------------------------------- */
.tbl-scroll { overflow-x: auto; border: var(--rule) solid var(--hair); border-radius: var(--radius); }
.tbl-scroll:focus-visible { outline-offset: -2px; }

.tbl { font-family: var(--font-mono); font-size: 0.8125rem; letter-spacing: 0.01em; min-width: 560px; }
.tbl caption {
  text-align: left; padding: 16px 18px; color: var(--text-low);
  font-size: 0.75rem; letter-spacing: 0.04em; border-bottom: var(--rule) solid var(--hair);
  background: rgba(233, 238, 245, 0.02);
}
.tbl th {
  text-align: left; font-weight: 500; color: var(--text-low);
  text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.6875rem;
  padding: 13px 18px; background: rgba(233, 238, 245, 0.035);
  border-bottom: var(--rule) solid var(--hair); white-space: nowrap;
  position: sticky; top: 0; z-index: 1;
}
.tbl td { padding: 13px 18px; color: var(--text-mid); border-bottom: var(--rule) solid var(--hair); vertical-align: top; }
.tbl tbody tr:last-child td { border-bottom: 0; }
.tbl tbody tr:nth-child(even) td { background: rgba(233, 238, 245, 0.016); }
.tbl tbody tr:hover td { background: rgba(113, 203, 227, 0.055); color: var(--text-hi); }
.tbl th:first-child, .tbl td:first-child { color: var(--text-hi); }
.tbl .is-na { color: var(--text-low); }
.tbl .is-hit { color: var(--amber-400); }
.tbl tr.is-hidden { display: none; }

/* Spec table — label / value pairs, the core of every product page. */
.spectbl { width: 100%; font-family: var(--font-mono); font-size: 0.8125rem; }
.spectbl th {
  width: 30%; min-width: 150px; text-align: left; vertical-align: top;
  font-weight: 400; color: var(--text-low); text-transform: uppercase;
  letter-spacing: 0.1em; font-size: 0.6875rem; padding: 16px 20px 16px 0;
  border-bottom: var(--rule) solid var(--hair);
}
.spectbl td { padding: 16px 0; color: var(--text-hi); line-height: 1.7; border-bottom: var(--rule) solid var(--hair); }
.spectbl tr:last-child th, .spectbl tr:last-child td { border-bottom: 0; }
@media (max-width: 599px) {
  .spectbl, .spectbl tbody, .spectbl tr, .spectbl th, .spectbl td { display: block; width: 100%; }
  .spectbl th { border-bottom: 0; padding: 16px 0 6px; }
  .spectbl td { padding: 0 0 16px; }
}

/* --------------------------------------------------------------------------
   14 · FORMS
   -------------------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 8px; }
.field__l {
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-low);
}
.field__l .req { color: var(--amber-400); }

.input, .select, .textarea {
  width: 100%; background: var(--gun-700); color: var(--text-hi);
  border: var(--rule) solid var(--gun-600); border-radius: var(--radius);
  padding: 13px 14px; font-family: var(--font-mono); font-size: 0.875rem;
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
  -webkit-appearance: none; appearance: none;
}
.input::placeholder, .textarea::placeholder { color: var(--text-low); }
.input:hover, .select:hover, .textarea:hover { border-color: var(--gun-500); }
.input:focus, .select:focus, .textarea:focus { border-color: var(--cyan-400); outline: none; background: var(--gun-800); }
.input:focus-visible, .select:focus-visible, .textarea:focus-visible { outline: 2px solid var(--cyan-400); outline-offset: 1px; }
.textarea { min-height: 128px; resize: vertical; line-height: 1.6; }
.select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%236F7E90' stroke-width='1.4'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; background-size: 10px 6px;
  padding-right: 36px;
}
.select option { background: var(--gun-700); color: var(--text-hi); }

.form-grid { display: grid; gap: 18px; }
@media (min-width: 700px) { .form-grid--2 { grid-template-columns: repeat(2, 1fr); } .form-grid .is-full { grid-column: 1 / -1; } }

.form-note {
  font-family: var(--font-mono); font-size: 0.6875rem; line-height: 1.7;
  color: var(--text-low); letter-spacing: 0.02em;
}
.form-err {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--amber-400);
  min-height: 1.2em;
}

/* --------------------------------------------------------------------------
   15 · PAGE BLOCKS
   -------------------------------------------------------------------------- */

/* ── Hero ── */
.hero { position: relative; min-height: 100svh; display: flex; align-items: flex-end; overflow: hidden; background: var(--navy-950); }
.hero__media { position: absolute; inset: 0; z-index: 0; }
.hero__media img, .hero__media video { width: 100%; height: 100%; object-fit: cover; }
.hero__scrim {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(to bottom, rgba(1, 24, 55, 0.55) 0%, rgba(1, 24, 55, 0.62) 38%, rgba(1, 13, 34, 0.94) 100%),
    radial-gradient(90% 70% at 15% 30%, rgba(2, 35, 78, 0.5), transparent 70%);
}
.hero__in { position: relative; z-index: 2; width: 100%; padding-block: 140px 48px; }
.hero__h1 { max-width: 17ch; }
.hero__h1 .ln { display: block; }
.hero__h1 .ln--cy { color: var(--cyan-400); }
.hero__sub { max-width: 52ch; margin-top: 26px; }
.hero__cta { margin-top: 38px; }
.hero__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; margin-top: 56px; padding-top: 24px; border-top: var(--rule) solid rgba(113, 203, 227, 0.2); }
.hero__cred { display: flex; flex-wrap: wrap; gap: 8px 24px; font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-mid); }
.hero__cred li { display: flex; align-items: center; gap: 8px; }
.hero__cred li::before { content: ''; width: 4px; height: 4px; background: var(--cyan-400); flex: none; }

.scrollcue {
  position: absolute; left: 50%; bottom: 26px; z-index: 3; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--text-low);
  transition: opacity var(--t-slow) var(--ease);
}
.scrollcue.is-gone { opacity: 0; }
.scrollcue__bar { width: 1px; height: 34px; background: linear-gradient(to bottom, var(--cyan-400), transparent); }
@media (max-width: 899px) { .scrollcue { display: none; } }

/* ── Credential strip ── */
.credstrip { border-top: var(--rule) solid var(--navy-600); border-bottom: var(--rule) solid var(--navy-600); }
.credstrip__in { display: flex; flex-wrap: wrap; gap: 14px 40px; align-items: center; justify-content: space-between; padding-block: 20px; }
.credstrip__i { display: flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-mid); }
.credstrip__i svg { width: 15px; height: 15px; color: var(--cyan-400); flex: none; }

/* ── Media pairing (About, narrative blocks) ── */
.pair { align-items: center; }
.pair__media { position: relative; border: var(--rule) solid var(--hair); border-radius: var(--radius); overflow: hidden; }
.pair__media img { width: 100%; height: auto; }
.pair__kw { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }

/* ── Materials filter ── */
.matfilter { position: relative; margin-bottom: 40px; max-width: 520px; }
.matfilter__input {
  width: 100%; background: var(--gun-700); border: var(--rule) solid var(--gun-600);
  color: var(--text-hi); border-radius: var(--radius);
  padding: 15px 46px 15px 44px; font-family: var(--font-mono); font-size: 0.875rem;
  transition: border-color var(--t-fast) var(--ease);
}
.matfilter__input:focus { border-color: var(--cyan-400); outline: none; }
.matfilter__input:focus-visible { outline: 2px solid var(--cyan-400); outline-offset: 1px; }
.matfilter__ico { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--text-low); pointer-events: none; }
.matfilter__clear {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px; display: none; place-items: center;
  background: none; border: 0; cursor: pointer; color: var(--text-low); border-radius: var(--radius);
}
.matfilter__clear.is-on { display: grid; }
.matfilter__clear:hover { color: var(--text-hi); }
.matfilter__count { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.08em; color: var(--text-low); margin-top: 10px; }
.matfilter__count b { color: var(--amber-400); font-weight: 400; }

.matfam { padding-block: 28px; border-top: var(--rule) solid var(--hair); }
.matfam:first-of-type { border-top: 0; padding-top: 0; }
.matfam.is-hidden { display: none; }
.matfam__h { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 16px; }

/* ── Process steps ── */
.steps { counter-reset: none; }
.step { position: relative; padding-top: 26px; border-top: var(--rule) solid var(--hair-strong); }
.step__n { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.16em; color: var(--cyan-400); margin-bottom: 18px; }
.step__ico { width: 44px; height: 44px; color: var(--cyan-400); margin-bottom: 20px; }
.step__d { color: var(--text-mid); font-size: 0.9375rem; line-height: 1.6; margin-top: 10px; }

/* ── Industries grid ── */
.indgrid { display: grid; gap: 1px; background: var(--hair); border: var(--rule) solid var(--hair); border-radius: var(--radius); overflow: hidden; }
@media (min-width: 480px) { .indgrid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 760px) { .indgrid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1080px) { .indgrid { grid-template-columns: repeat(4, 1fr); } }
.ind {
  display: flex; align-items: center; gap: 16px; padding: 24px 20px;
  background: var(--navy-800); min-height: 96px;
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.ind:hover, .ind:focus-visible { background: var(--navy-700); color: var(--cyan-400); }
.ind__ico { width: 30px; height: 30px; flex: none; color: var(--cyan-400); }
.ind__n { font-size: 0.9375rem; font-weight: 500; line-height: 1.3; }
.ind--more { background: var(--navy-900); }
.ind--more .ind__n { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan-400); }

/* ── Global reach map ── */
.gmap { position: relative; }
.gmap svg { width: 100%; height: auto; overflow: visible; }
.gmap__land { fill: rgba(113, 203, 227, 0.10); stroke: rgba(113, 203, 227, 0.28); stroke-width: 0.5; }
.gmap__mk { fill: var(--amber-400); }
.gmap__ring { fill: none; stroke: var(--amber-400); stroke-width: 0.8; opacity: 0.5; }
.gmap__lbl { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.1em; fill: var(--text-mid); text-transform: uppercase; }

/* ── Leadership ── */
.lead-block { display: grid; gap: 0; align-items: stretch; }
@media (min-width: 900px) { .lead-block { grid-template-columns: 5fr 7fr; } }
.lead-block__media { position: relative; min-height: 380px; background: var(--navy-950); }
.lead-block__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 22%; }
.lead-block__body { display: flex; flex-direction: column; justify-content: center; padding: clamp(36px, 6vw, 80px); }
.lead-block__q {
  font-family: var(--font-display); font-stretch: 125%; font-weight: 600;
  font-size: clamp(1.25rem, 2.1vw, 1.75rem); line-height: 1.38; letter-spacing: -0.012em;
  color: var(--text-hi); text-wrap: pretty;
}
.lead-block__q::before { content: '\201C'; color: var(--cyan-400); }
.lead-block__q::after { content: '\201D'; color: var(--cyan-400); }
.lead-block__by { margin-top: 28px; padding-top: 20px; border-top: var(--rule) solid var(--hair); }

/* ── CTA banner ── */
.ctaband { position: relative; overflow: hidden; background: var(--navy-950); }
.ctaband__bg { position: absolute; inset: 0; z-index: 0; }
.ctaband__bg img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 42%; }
.ctaband__scrim {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(105deg, rgba(1, 13, 34, 0.96) 0%, rgba(1, 24, 55, 0.9) 45%, rgba(2, 35, 78, 0.62) 100%);
}
.ctaband__in { position: relative; z-index: 2; padding-block: clamp(64px, 8vw, 120px); }
.ctaband__body { max-width: 640px; }

/* ── Page banner (inner pages) ── */
.pbanner { position: relative; overflow: hidden; background: var(--navy-950); min-height: 40vh; display: flex; align-items: flex-end; padding-top: var(--header-h); }
.pbanner__bg { position: absolute; inset: 0; z-index: 0; }
.pbanner__bg img { width: 100%; height: 100%; object-fit: cover; }
.pbanner__scrim {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(to bottom, rgba(1, 13, 34, 0.86) 0%, rgba(1, 13, 34, 0.72) 45%, rgba(1, 13, 34, 0.97) 100%);
}
.pbanner__in { position: relative; z-index: 2; width: 100%; padding-block: clamp(40px, 6vw, 72px); }
.pbanner__sum { max-width: 62ch; margin-top: 18px; }
.pbanner--plain { min-height: 0; background: var(--navy-950); }

.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.08em; color: var(--text-low); margin-bottom: 22px; }
.crumbs a { color: var(--text-mid); }
.crumbs a:hover { color: var(--cyan-400); }
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: '/'; color: var(--gun-500); }
.crumbs [aria-current] { color: var(--cyan-400); }

/* ── Product page layout ── */
.plyt { display: grid; gap: clamp(32px, 4vw, 56px); align-items: start; }
@media (min-width: 1000px) { .plyt { grid-template-columns: 300px 1fr; } }

.sidebar { display: grid; gap: 20px; }
@media (min-width: 1000px) { .sidebar { position: sticky; top: calc(var(--header-h) + 24px); } }
.sidebar__box { border: var(--rule) solid var(--hair); border-radius: var(--radius); background: rgba(233, 238, 245, 0.02); }
.sidebar__h {
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-low);
  padding: 16px 18px; border-bottom: var(--rule) solid var(--hair);
}
.sibs li + li { border-top: var(--rule) solid var(--hair); }
.sibs a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 18px; font-size: 0.9375rem; color: var(--text-mid);
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.sibs a:hover, .sibs a:focus-visible { color: var(--text-hi); background: rgba(113, 203, 227, 0.06); }
.sibs [aria-current="page"] { color: var(--cyan-400); background: rgba(113, 203, 227, 0.08); box-shadow: inset 2px 0 0 var(--cyan-400); }
.sidebar__actions { display: grid; gap: 10px; }
.sidebar__help { padding: 18px; font-size: 0.875rem; color: var(--text-mid); line-height: 1.6; }
.sidebar__help a { color: var(--cyan-400); font-family: var(--font-mono); font-size: 0.8125rem; display: block; margin-top: 6px; }

/* ── Gallery ── */
.gal { display: grid; gap: 12px; }
.gal__main { position: relative; aspect-ratio: 4 / 3; overflow: hidden; border: var(--rule) solid var(--hair); border-radius: var(--radius); background: var(--navy-950); }
.gal__main img { width: 100%; height: 100%; object-fit: cover; }
.gal__thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.gal__thumb {
  position: relative; aspect-ratio: 1; overflow: hidden; padding: 0; cursor: pointer;
  border: var(--rule) solid var(--hair); border-radius: var(--radius);
  background: var(--navy-950);
  transition: border-color var(--t-fast) var(--ease);
}
.gal__thumb img { width: 100%; height: 100%; object-fit: cover; }
.gal__thumb:hover { border-color: var(--hair-strong); }
.gal__thumb[aria-current="true"] { border-color: var(--cyan-400); }

/* ── Long-form technical prose ── */
.tech { max-width: 72ch; }
.tech h3 { margin-top: 40px; margin-bottom: 14px; }
.tech h3:first-child { margin-top: 0; }
.tech p { color: var(--text-mid); margin-bottom: 1.15em; text-wrap: pretty; }
.tech ul { margin: 0 0 1.15em; display: grid; gap: 9px; }
.tech ul li { position: relative; padding-left: 22px; color: var(--text-mid); }
.tech ul li::before { content: ''; position: absolute; left: 4px; top: 0.65em; width: 6px; height: var(--rule); background: var(--cyan-400); }
.tech strong { color: var(--text-hi); font-weight: 500; }

/* ── Calculator ── */
.tabs { display: flex; flex-wrap: wrap; gap: 4px; border-bottom: var(--rule) solid var(--hair); margin-bottom: 28px; }
.tab {
  background: none; border: 0; cursor: pointer; padding: 13px 16px;
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-low); border-bottom: 2px solid transparent;
  margin-bottom: -1px; transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.tab:hover { color: var(--text-hi); }
.tab[aria-selected="true"] { color: var(--cyan-400); border-bottom-color: var(--cyan-400); }
.tabpanel[hidden] { display: none; }

.calcout { border: var(--rule) solid var(--hair); border-radius: var(--radius); background: rgba(233, 238, 245, 0.025); padding: 24px; }
.calcout__row { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding-block: 12px; border-bottom: var(--rule) solid var(--hair); }
.calcout__row:last-of-type { border-bottom: 0; }
.calcout__l { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-low); }
.calcout__v { font-family: var(--font-mono); font-size: clamp(1.125rem, 2.4vw, 1.625rem); font-weight: 500; color: var(--amber-400); font-variant-numeric: tabular-nums; }
.calcout__v small { font-size: 0.6em; color: var(--text-low); margin-left: 6px; letter-spacing: 0.06em; }

.copybtn {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 18px;
  background: none; border: var(--rule) solid var(--hair); border-radius: var(--radius);
  padding: 10px 14px; cursor: pointer; color: var(--text-mid);
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.1em; text-transform: uppercase;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.copybtn:hover { color: var(--cyan-400); border-color: var(--cyan-400); }

/* ── Glossary ── */
.gloss { display: grid; gap: 0; }
.gloss__i { padding-block: 28px; border-top: var(--rule) solid var(--hair); display: grid; gap: 12px; }
@media (min-width: 800px) { .gloss__i { grid-template-columns: 4fr 8fr; gap: 32px; } }
.gloss__i:first-child { border-top: 0; }
.gloss__t { font-family: var(--font-mono); font-size: 0.9375rem; font-weight: 500; color: var(--cyan-400); letter-spacing: 0.01em; }
.gloss__s { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-low); margin-top: 6px; }
.gloss__d { color: var(--text-mid); line-height: 1.65; }

/* ── Notice / caution box ── */
.notice {
  display: flex; gap: 14px; padding: 18px 20px;
  border: var(--rule) solid rgba(255, 138, 43, 0.32); border-radius: var(--radius);
  background: rgba(255, 138, 43, 0.06);
}
.notice svg { width: 18px; height: 18px; flex: none; color: var(--amber-400); margin-top: 2px; }
.notice p { font-family: var(--font-mono); font-size: 0.75rem; line-height: 1.7; color: var(--text-mid); letter-spacing: 0.01em; }

/* ── Inline b-roll panel ── */
.broll { position: relative; border: var(--rule) solid var(--hair); border-radius: var(--radius); overflow: hidden; background: var(--navy-950); }
.broll video { width: 100%; height: 100%; object-fit: cover; display: block; }
.broll__lbl {
  position: absolute; left: 14px; bottom: 14px; z-index: 2;
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-mid);
  background: rgba(1, 13, 34, 0.8); border: var(--rule) solid var(--hair);
  padding: 6px 10px; border-radius: var(--radius);
}

/* ── Technical SVG diagrams (categories with no photograph) ── */
.card__media--diagram,
.gal__main--diagram {
  display: grid; place-items: center; padding: 8%;
  background:
    linear-gradient(160deg, rgba(12, 70, 129, 0.16), transparent 60%),
    var(--navy-950);
}
.gal__main--diagram { aspect-ratio: 4 / 3; border: var(--rule) solid var(--hair); border-radius: var(--radius); }
.tdiag { width: 100%; height: auto; }
.tdiag .td-face { fill: rgba(113, 203, 227, 0.10); stroke: var(--cyan-400); stroke-width: 1.4; }
.tdiag .td-bore { fill: var(--navy-950); stroke: var(--cyan-400); stroke-width: 1.2; }
.tdiag .td-line { stroke: rgba(169, 182, 198, 0.55); stroke-width: 1.2; fill: none; }
.tdiag .td-dim  { stroke: var(--amber-400); stroke-width: 1; fill: none; }
.tdiag .td-weld { stroke: var(--amber-400); stroke-width: 1.6; fill: none; }
.tdiag .td-t {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  fill: var(--text-low);
}

/* ── Sortable table headers ── */
.th-sort {
  background: none; border: 0; padding: 0; cursor: pointer; color: inherit;
  font: inherit; letter-spacing: inherit; text-transform: inherit;
  display: inline-flex; align-items: center; gap: 6px;
}
.th-sort::after { content: '\2195'; opacity: 0.4; font-size: 0.9em; }
.th-sort:hover { color: var(--text-hi); }
[aria-sort="ascending"] .th-sort::after { content: '\2191'; opacity: 1; color: var(--cyan-400); }
[aria-sort="descending"] .th-sort::after { content: '\2193'; opacity: 1; color: var(--cyan-400); }

/* --------------------------------------------------------------------------
   16 · REVEAL ON SCROLL
   -------------------------------------------------------------------------- */
.rv { opacity: 0; transform: translateY(16px); }
.rv.is-in { opacity: 1; transform: none; transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease); }
.no-js .rv { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   16b · NO-JS FALLBACK
   The nav markup is static, so without JS the drawer simply becomes a plain
   block of links under the header and every page stays fully navigable.
   -------------------------------------------------------------------------- */
.no-js .hdr { position: static; }
.no-js .burger { display: none; }
.no-js .drawer {
  display: block;
  position: static; inset: auto; opacity: 1; visibility: visible; transform: none;
  height: auto; overflow: visible; border-bottom: var(--rule) solid var(--navy-600);
}
.no-js .drawer__panel { display: block; }
.no-js .drawer__toggle { display: none; }
/* Without JS the whole menu is on the page at once, so lay it out in columns
   rather than one very long list. */
@media (min-width: 760px) {
  .no-js .drawer__panel { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 24px; }
  .no-js .drawer__panel a { min-height: 40px; padding-block: 8px; }
}
.no-js .hdr__nav, .no-js .hdr__actions { display: none; }
.no-js .wa { opacity: 1; visibility: visible; transform: none; }

/* --------------------------------------------------------------------------
   17 · UTILITIES
   -------------------------------------------------------------------------- */
.u-mt-s { margin-top: 16px; }
.u-mt-m { margin-top: 28px; }
.u-mt-l { margin-top: 44px; }
.u-mb-m { margin-bottom: 28px; }
.u-flex { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.u-center { text-align: center; }
.u-maxw { max-width: 68ch; }

/* --------------------------------------------------------------------------
   18 · REDUCED MOTION
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .rv { opacity: 1; transform: none; }
  .card__media img { transition: none; }
}

/* --------------------------------------------------------------------------
   19 · PRINT  (the site is dark; print gets legible ink)
   -------------------------------------------------------------------------- */
@media print {
  .hdr, .drawer, .wa, .scrollcue, .forge, .ctaband, video { display: none !important; }
  body { background: #fff; color: #000; }
  .surf::before { display: none; }
  a[href^="http"]::after { content: ' (' attr(href) ')'; font-size: 0.8em; }
}