/* ============================================================
   Chemplax — v2 / Defense-tech Precision
   Stark, gridded, monospace-heavy
   ============================================================ */

:root {
  --bg: #FFFFFF;
  --bg-soft: #F4F4F2;
  --bg-deep: #0A0A0A;
  --ink: #0A0A0A;
  --ink-soft: #1F1F1F;
  --ink-mute: #6E6E6E;
  --rule: #DCDCDC;
  --rule-strong: #0A0A0A;
  --signal: #FF2E00;          /* laser red precision marker */
  --signal-tint: #FFE7E1;
  --on-ink: #F4F4F2;

  --font-sans: "Space Grotesk", -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --maxw: 1400px;
  --pad-x: clamp(20px, 3.5vw, 48px);
  --gridcol: 32px;
  --section-y: clamp(80px, 9vw, 140px);

  --ease: cubic-bezier(.2, .7, .2, 1);
}

[data-theme="dark"] {
  --bg: #0A0A0A;
  --bg-soft: #141414;
  --bg-deep: #FFFFFF;
  --ink: #F4F4F2;
  --ink-soft: #DCDCDC;
  --ink-mute: #888888;
  --rule: #2A2A2A;
  --rule-strong: #F4F4F2;
  --signal: #FF2E00;
  --signal-tint: #2A0F08;
  --on-ink: #0A0A0A;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.005em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .15s var(--ease), background .15s var(--ease);
}

img { display: block; max-width: 100%; }

::selection { background: var(--signal); color: #FFF; }

/* ============================================================
   Background grid (gives the "instrument" precision feel)
   ============================================================ */
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(to right, color-mix(in oklab, var(--ink) 4%, transparent) 1px, transparent 1px);
  background-size: var(--gridcol) 100%;
  opacity: 0.5;
}

main, .site-header, .site-footer { position: relative; z-index: 1; }

/* ============================================================
   Type
   ============================================================ */
.display, .h1, .h2, .h3, .h4 {
  font-family: var(--font-sans);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin: 0;
  text-wrap: balance;
}
.display {
  font-size: clamp(56px, 10.5vw, 168px);
  letter-spacing: -0.055em;
  line-height: 0.86;
  font-weight: 500;
}
.h1 { font-size: clamp(44px, 6.2vw, 96px); letter-spacing: -0.045em; line-height: 0.92; }
.h2 { font-size: clamp(32px, 4.2vw, 64px); letter-spacing: -0.035em; line-height: 0.96; }
.h3 { font-size: clamp(22px, 1.9vw, 28px); letter-spacing: -0.022em; line-height: 1.1; font-weight: 500; }
.h4 { font-size: clamp(17px, 1.3vw, 19px); letter-spacing: -0.012em; line-height: 1.15; font-weight: 500; }

.lede {
  font-size: clamp(17px, 1.2vw, 20px);
  line-height: 1.45;
  color: var(--ink-soft);
  max-width: 60ch;
  text-wrap: pretty;
  letter-spacing: -0.005em;
}

.body {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 64ch;
}

.mono, .meta {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  text-transform: uppercase;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--signal);
}

.num {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(40px, 5vw, 76px);
  letter-spacing: -0.04em;
  line-height: 0.9;
  font-feature-settings: "tnum";
}

.num-mono {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: clamp(40px, 5vw, 76px);
  letter-spacing: -0.02em;
  line-height: 0.95;
}

/* ============================================================
   Container
   ============================================================ */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  position: relative;
}

.section { padding: var(--section-y) 0; position: relative; }
.section-tight { padding: clamp(60px, 7vw, 96px) 0; position: relative; }

/* ============================================================
   Registration ticks (corner marks like a technical drawing)
   ============================================================ */
.ticks {
  position: relative;
}
.ticks::before, .ticks::after,
.ticks > .tick-tl, .ticks > .tick-tr,
.ticks > .tick-bl, .ticks > .tick-br {
  position: absolute;
  width: 14px; height: 14px;
  pointer-events: none;
  z-index: 2;
}
.tick { position: relative; }
.tick::before {
  content: "+";
  position: absolute;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  line-height: 1;
}
.tick-tl { top: -7px; left: -7px; }
.tick-tr { top: -7px; right: -7px; }
.tick-bl { bottom: -7px; left: -7px; }
.tick-br { bottom: -7px; right: -7px; }
.tick-tl::before, .tick-tr::before, .tick-bl::before, .tick-br::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  line-height: 1;
  position: absolute;
  inset: 0;
  text-align: center;
}

/* ============================================================
   Header / Navigation
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg) 90%, transparent);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.site-header__bar {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  justify-content: space-between;
  padding: 6px var(--pad-x);
  border-bottom: 1px solid var(--rule);
  max-width: var(--maxw);
  margin: 0 auto;
  gap: 24px;
}
.site-header__bar .live::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--signal);
  margin-right: 6px;
  transform: translateY(-1px);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 36px;
  padding: 16px var(--pad-x);
  max-width: var(--maxw);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans);
  font-weight: 500;
  letter-spacing: -0.04em;
  font-size: 22px;
}
.brand__mark {
  width: 28px; height: 28px;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.brand__mark svg { display: block; }
.site-footer__brand .brand__mark { color: #F4F4F2; }
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-left: 6px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav > a, .nav__has-sub > a {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 10px 14px;
  position: relative;
  transition: color .15s var(--ease);
}
.nav > a:hover, .nav__has-sub > a:hover { color: var(--signal); }
.nav a.is-active { color: var(--signal); }
.nav__has-sub { position: relative; }
.nav__sub {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 300px;
  background: var(--bg);
  border: 1px solid var(--ink);
  padding: 8px;
  display: none;
  flex-direction: column;
  gap: 2px;
}
.nav__has-sub:hover .nav__sub { display: flex; }
.nav__sub a {
  padding: 11px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  border-left: 2px solid transparent;
}
.nav__sub a:hover { background: var(--bg-soft); border-left-color: var(--signal); }
.nav__sub small {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-mute);
}

.nav > a.nav__cta {
  background: var(--ink);
  color: var(--bg);
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-left: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nav > a.nav__cta:hover { background: var(--signal); color: #FFF; }
.nav > a.nav__cta::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 12px;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  height: 48px;
  padding: 0 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: all .15s var(--ease);
  white-space: nowrap;
  border-radius: 0;
  position: relative;
}
.btn::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 13px;
  transition: transform .15s var(--ease);
}
.btn:hover::after { transform: translateX(4px); }

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--signal);
  color: #FFF;
  border-color: var(--signal);
}

.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }

.btn-quiet { border-color: var(--rule); }
.btn-quiet:hover { border-color: var(--ink); }

.btn-signal {
  background: var(--signal);
  color: #FFF;
  border-color: var(--signal);
}
.btn-signal:hover { background: #C71F00; border-color: #C71F00; }

/* ============================================================
   Photo placeholder — high-tech treatment
   ============================================================ */
.photo {
  position: relative;
  overflow: hidden;
  background: var(--bg-soft);
  border: 1px solid var(--rule);
}
.photo--stripe {
  background-image:
    linear-gradient(to right, color-mix(in oklab, var(--ink) 6%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in oklab, var(--ink) 6%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom right,
      var(--bg-soft) 0%,
      color-mix(in oklab, var(--bg-soft) 88%, var(--ink) 12%) 100%);
  background-size: 24px 24px, 24px 24px, 100% 100%;
}
.photo--ink {
  background:
    linear-gradient(to right, color-mix(in oklab, #FFF 8%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in oklab, #FFF 8%, transparent) 1px, transparent 1px),
    linear-gradient(135deg, #0A0A0A 0%, #1F1F1F 100%);
  background-size: 24px 24px, 24px 24px, 100% 100%;
  color: #F4F4F2;
  border-color: #1F1F1F;
}

/* Photo with real image */
.photo--img {
  background: var(--bg-soft);
  border: 1px solid var(--rule);
}
.photo--img img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.photo--img .photo__corner,
.photo--img .photo__label {
  z-index: 2;
}
.photo--img .photo__label {
  background: color-mix(in oklab, #0A0A0A 70%, transparent);
  color: #F4F4F2;
  padding: 6px 10px;
  left: 12px; right: 12px;
  width: auto;
}
.photo--img .photo__corner {
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--rule);
}
.photo__corner {
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--bg);
  padding: 4px 8px;
  border: 1px solid var(--rule);
}
.photo--ink .photo__corner {
  background: #0A0A0A;
  color: #F4F4F2;
  border-color: #2A2A2A;
}
.photo__label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.photo--ink .photo__label { color: color-mix(in oklab, #FFF 50%, transparent); }
.photo__crosshair {
  position: absolute;
  top: 50%; left: 50%;
  width: 36px; height: 36px;
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.photo__crosshair::before, .photo__crosshair::after {
  content: "";
  position: absolute;
  background: color-mix(in oklab, var(--ink) 35%, transparent);
}
.photo--ink .photo__crosshair::before, .photo--ink .photo__crosshair::after {
  background: color-mix(in oklab, #FFF 35%, transparent);
}
.photo__crosshair::before {
  top: 50%; left: 0; right: 0; height: 1px;
}
.photo__crosshair::after {
  left: 50%; top: 0; bottom: 0; width: 1px;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding-top: 32px;
  padding-bottom: 80px;
  position: relative;
}
.hero__bar {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
  margin-bottom: 48px;
}
.hero__bar > div {
  padding: 14px 16px 14px 0;
  border-right: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 56px;
}
.hero__bar > div:last-child { border-right: 0; }
.hero__bar > div strong {
  color: var(--ink);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.hero__headline {
  margin: 32px 0 40px;
}

.hero__split {
  display: grid;
  grid-template-columns: 6fr 6fr;
  gap: 48px;
  align-items: start;
  margin-top: 48px;
}

.hero__photo {
  height: clamp(380px, 50vw, 600px);
}

.hero__cta {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

@media (max-width: 1000px) {
  .hero__split { grid-template-columns: 1fr; gap: 24px; }
  .hero__photo { height: 320px; }
  .hero__bar { grid-template-columns: 1fr 1fr; }
  .hero__bar > div:nth-child(2) { border-right: 0; }
  .hero__bar > div { border-bottom: 1px solid var(--rule); }
}

/* ============================================================
   Numeric strip
   ============================================================ */
.metric-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.metric-row__cell {
  padding: 36px 24px 36px 0;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
  min-height: 220px;
  position: relative;
}
.metric-row__cell:last-child { border-right: 0; }
.metric-row__cell .meta { font-size: 10px; }
.metric-row__cell .num-mono { color: var(--ink); }
.metric-row__cell p {
  margin: 0;
  font-size: 12px;
  color: var(--ink-mute);
  line-height: 1.45;
  max-width: 30ch;
  font-family: var(--font-mono);
}
.metric-row__cell::before {
  content: "";
  position: absolute;
  top: 18px; right: 12px;
  width: 6px; height: 6px;
  background: var(--signal);
}
.metric-row__cell:last-child::before { right: 0; }
@media (max-width: 800px) {
  .metric-row { grid-template-columns: 1fr 1fr; }
  .metric-row__cell:nth-child(2) { border-right: 0; }
  .metric-row__cell { border-bottom: 1px solid var(--rule); }
}

/* ============================================================
   Section header
   ============================================================ */
.sec-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
  align-items: end;
  border-top: 1px solid var(--ink);
  padding-top: 24px;
}
.sec-head__l { display: flex; flex-direction: column; gap: 32px; }
.sec-head h2 { margin: 0; }
@media (max-width: 900px) {
  .sec-head { grid-template-columns: 1fr; gap: 16px; }
}

/* ============================================================
   Capabilities — 3-column with serial numbers
   ============================================================ */
.caps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink);
}
.caps__card {
  padding: 36px 28px 36px 0;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 420px;
  position: relative;
}
.caps__card:last-child { border-right: 0; }
.caps__card .meta { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.caps__card .meta strong { color: var(--ink); font-weight: 500; }
.caps__card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.5;
  max-width: 36ch;
}
.caps__card ul {
  list-style: none;
  margin: auto 0 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
}
.caps__card ul li {
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.caps__card ul li:last-child { border-bottom: 0; }
.caps__card ul li span:last-child { color: var(--ink); }

@media (max-width: 900px) {
  .caps { grid-template-columns: 1fr; }
  .caps__card { border-right: 0; border-bottom: 1px solid var(--rule); }
}

/* ============================================================
   Product cards — high-tech
   ============================================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--rule);
}
.product-card {
  grid-column: span 4;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--bg);
  position: relative;
  transition: background .15s var(--ease);
  min-height: 480px;
}
.product-card:hover { background: var(--bg-soft); }
.product-card--wide { grid-column: span 6; }

.product-card__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.product-card__head .chem { color: var(--ink-mute); }
.product-card__head .sku { color: var(--ink); }
.product-card__head .sku::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--signal);
  margin-right: 8px;
  transform: translateY(-1px);
}

.product-card h3 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 2.4vw, 38px);
  letter-spacing: -0.04em;
  font-weight: 500;
  margin: 0;
  line-height: 0.95;
}

.product-card .photo { height: 160px; }

.product-card p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.5;
  font-family: var(--font-mono);
}

.product-card__foot {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink);
}

@media (max-width: 1100px) {
  .product-card,
  .product-card--wide { grid-column: span 6; }
}
@media (max-width: 700px) {
  .product-card,
  .product-card--wide { grid-column: span 12; }
}

/* ============================================================
   Industries — vertical rail
   ============================================================ */
.industries {
  border-top: 1px solid var(--ink);
}
.industries__row {
  display: grid;
  grid-template-columns: 80px 1fr 2fr 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
  align-items: center;
  transition: padding .15s var(--ease);
  cursor: default;
}
.industries__row:hover { padding-left: 16px; background: var(--bg-soft); }
.industries__row .idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
}
.industries__row h4 {
  font-family: var(--font-sans);
  font-size: clamp(20px, 1.8vw, 26px);
  font-weight: 500;
  letter-spacing: -0.025em;
  margin: 0;
}
.industries__row p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
  line-height: 1.5;
}
.industries__row .grades {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-end;
}
.industries__row .grades span::before {
  content: "→ ";
  color: var(--signal);
}

@media (max-width: 800px) {
  .industries__row { grid-template-columns: 40px 1fr; }
  .industries__row p, .industries__row .grades { display: none; }
}

/* ============================================================
   Closed loop section — DARK
   ============================================================ */
.loop {
  background: #0A0A0A;
  color: #F4F4F2;
  padding: clamp(56px, 7vw, 96px);
  position: relative;
  border: 1px solid #0A0A0A;
}
.loop .eyebrow { color: #F4F4F2; }
.loop h2 { color: #F4F4F2; margin-top: 24px; }
.loop p { color: color-mix(in oklab, #F4F4F2 75%, transparent); }
.loop__grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 64px;
  align-items: start;
}
.loop__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid color-mix(in oklab, #F4F4F2 30%, transparent);
}
.loop__step {
  padding: 22px 14px 22px 0;
  border-right: 1px solid color-mix(in oklab, #F4F4F2 18%, transparent);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 220px;
  position: relative;
}
.loop__step:last-child { border-right: 0; }
.loop__step::before {
  content: "";
  position: absolute;
  top: 14px; right: 10px;
  width: 6px; height: 6px;
  background: var(--signal);
}
.loop__step:last-child::before { right: 0; }
.loop__step .meta { color: color-mix(in oklab, #F4F4F2 50%, transparent); font-size: 10px; }
.loop__step h5 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.022em;
  margin: 0;
  color: #F4F4F2;
}
.loop__step p {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: color-mix(in oklab, #F4F4F2 65%, transparent);
  font-family: var(--font-mono);
}

@media (max-width: 900px) {
  .loop__grid { grid-template-columns: 1fr; gap: 32px; }
  .loop__steps { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   CTA block — bold and direct
   ============================================================ */
.ctaboard {
  border-top: 1px solid var(--ink);
}
.ctaboard__row {
  display: grid;
  grid-template-columns: 60px 1fr 1.5fr auto;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  align-items: center;
  cursor: pointer;
  transition: padding .15s var(--ease), background .15s var(--ease);
}
.ctaboard__row:hover { background: var(--bg-soft); padding-left: 16px; }
.ctaboard__row:last-child { border-bottom: 1px solid var(--ink); }
.ctaboard__row .idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
}
.ctaboard__row h4 {
  font-family: var(--font-sans);
  font-size: clamp(22px, 2.0vw, 30px);
  font-weight: 500;
  letter-spacing: -0.028em;
  margin: 0;
}
.ctaboard__row p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
  line-height: 1.5;
}
@media (max-width: 800px) {
  .ctaboard__row { grid-template-columns: 40px 1fr; }
  .ctaboard__row p, .ctaboard__row .btn { display: none; }
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: #0A0A0A;
  color: #F4F4F2;
  padding: 72px 0 32px;
  margin-top: 80px;
  position: relative;
}
.site-footer__top {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid #2A2A2A;
}
.site-footer__brand { display: flex; flex-direction: column; gap: 24px; }
.site-footer__brand .brand { font-size: 28px; color: #F4F4F2; }
.site-footer__addr {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: color-mix(in oklab, #F4F4F2 70%, transparent);
}
.site-footer__addr a { color: #F4F4F2; }

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.site-footer__col h6 {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in oklab, #F4F4F2 50%, transparent);
  margin: 0 0 18px;
  font-weight: 500;
}
.site-footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.site-footer__col a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: color-mix(in oklab, #F4F4F2 80%, transparent);
}
.site-footer__col a:hover { color: var(--signal); }

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in oklab, #F4F4F2 50%, transparent);
  flex-wrap: wrap;
  gap: 16px;
}
.site-footer__bottom .marks { display: flex; gap: 18px; align-items: center; }
.iso-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid #2A2A2A;
}
.iso-mark strong { color: #F4F4F2; font-weight: 500; }

@media (max-width: 900px) {
  .site-footer__top { grid-template-columns: 1fr; }
  .site-footer__cols { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   Big chemical-formula display (decorative)
   ============================================================ */
.formula {
  font-family: var(--font-mono);
  font-size: clamp(40px, 6vw, 88px);
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ink);
}
.formula sub {
  font-size: 0.55em;
  vertical-align: baseline;
  position: relative;
  bottom: -0.18em;
}
.formula .op { color: var(--ink-mute); margin: 0 0.1em; }

/* ============================================================
   Tweaks panel
   ============================================================ */
.tweaks {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 100;
  background: var(--bg);
  border: 1px solid var(--ink);
  padding: 16px;
  width: 280px;
  font-family: var(--font-sans);
  display: none;
}
.tweaks.is-open { display: block; }
.tweaks__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
}
.tweaks__head h6 {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0;
}
.tweaks__close {
  background: none;
  border: 0;
  font-size: 18px;
  cursor: pointer;
  color: var(--ink-mute);
  padding: 0;
  line-height: 1;
  font-family: var(--font-mono);
}
.tweaks__section + .tweaks__section { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--rule); }
.tweaks__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 8px;
}
.tweaks__radios { display: flex; flex-direction: column; gap: 4px; }
.tweaks__radio {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border: 1px solid var(--rule);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: border-color .12s var(--ease);
}
.tweaks__radio:hover { border-color: var(--ink-mute); }
.tweaks__radio.is-active { border-color: var(--ink); background: var(--bg-soft); }
.tweaks__radio.is-active::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--signal);
}

/* ============================================================
   INTERIOR PAGES — shared components (v2 precision language)
   ============================================================ */

/* ISO value fix — keep "ISO 9001" on one line, :2015 inline & smaller */
.num-mono.num-iso {
  white-space: nowrap;
  font-size: clamp(30px, 3.4vw, 50px);
  letter-spacing: -0.03em;
}
.num-mono.num-iso .suffix {
  color: var(--ink-mute);
  font-size: 0.42em;
  letter-spacing: 0.02em;
}
.num-mono .suffix {
  color: var(--ink-mute);
  font-size: 0.42em;
  letter-spacing: 0;
}

/* ---- Page hero (interior top) ---- */
.page-hero {
  padding-top: 40px;
  padding-bottom: clamp(40px, 5vw, 72px);
  border-bottom: 1px solid var(--rule);
}
.page-hero__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-bottom: 16px;
  margin-bottom: clamp(36px, 5vw, 64px);
  border-top: 1px solid var(--ink);
  padding-top: 14px;
  flex-wrap: wrap;
}
.crumbs {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 10px;
}
.crumbs a { color: var(--ink); }
.crumbs a:hover { color: var(--signal); }
.crumbs span.sep { color: var(--rule-strong); opacity: 0.4; }
.page-hero h1 {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(40px, 6.6vw, 104px);
  letter-spacing: -0.05em;
  line-height: 0.9;
  margin: 0 0 28px;
  text-wrap: balance;
}
.page-hero h1 .red { color: var(--signal); }

/* ---- Generic split grids ---- */
.split-57 { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(32px, 5vw, 64px); align-items: start; }
.split-75 { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(32px, 5vw, 64px); align-items: start; }
.split-66 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 3vw, 48px); align-items: start; }
@media (max-width: 900px) {
  .split-57, .split-75, .split-66 { grid-template-columns: 1fr; gap: 28px; }
}

/* ---- Section header (interior, single-row variant) ---- */
.section-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: end;
  margin-bottom: 48px;
  border-top: 1px solid var(--ink);
  padding-top: 24px;
}
.section-head h2 { margin: 0; }
@media (max-width: 900px) { .section-head { grid-template-columns: 1fr; gap: 16px; } }

/* ---- Soft + dark section backgrounds ---- */
.section--soft { background: var(--bg-soft); }
.section--ink {
  background: #0A0A0A;
  color: #F4F4F2;
}
.section--ink .eyebrow,
.section--ink h2, .section--ink h3, .section--ink h4 { color: #F4F4F2; }
.section--ink .lede, .section--ink p { color: color-mix(in oklab, #F4F4F2 72%, transparent); }
.section--ink .section-head { border-top-color: color-mix(in oklab, #F4F4F2 40%, transparent); }
.section--ink .eyebrow::before { background: var(--signal); }

/* ---- Tags / chips ---- */
.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 7px 11px;
  background: var(--bg);
}
.tag-strong {
  background: var(--signal);
  color: #FFF;
  border-color: var(--signal);
}
.tag-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---- Spec table (technical, mono) ---- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--ink);
  font-family: var(--font-mono);
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 15px 16px 15px 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  font-size: 13px;
  line-height: 1.5;
}
.spec-table th {
  width: 36%;
  font-weight: 400;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 11px;
  padding-top: 17px;
}
.spec-table td { color: var(--ink); }
.spec-table thead th {
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  font-size: 10px;
}
.spec-table tbody tr:hover { background: var(--bg-soft); }
.spec-table .app-name {
  font-family: var(--font-sans);
  font-size: 16px;
  letter-spacing: -0.015em;
  color: var(--ink);
}

/* ---- Inline arrow link ---- */
.link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 4px;
  width: fit-content;
}
.link::after { content: "→"; transition: transform .15s var(--ease); }
.link:hover { color: var(--signal); border-color: var(--signal); }
.link:hover::after { transform: translateX(4px); }
.section--ink .link { color: #F4F4F2; border-color: #F4F4F2; }
.section--ink .link:hover { color: var(--signal); border-color: var(--signal); }

/* ---- Numbered cards row (re-uses caps grid; modifier for 4-up + short) ---- */
.caps--4 { grid-template-columns: repeat(4, 1fr); }
.caps--2 { grid-template-columns: 1fr 1fr; }
.caps__card.caps__card--short { min-height: 220px; }
@media (max-width: 1000px) {
  .caps--4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .caps--4, .caps--2 { grid-template-columns: 1fr; }
}
.caps__card .num-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.caps__card .num-tag .red { color: var(--signal); }

/* ---- Contact: cards row ---- */
.contact-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
}
.contact-row__cell {
  padding: 32px 24px 32px 0;
  border-right: 1px solid var(--rule);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  position: relative;
}
.contact-row__cell:last-child { border-right: 0; padding-right: 0; }
.contact-row__cell .big {
  font-family: var(--font-sans);
  font-size: clamp(22px, 2vw, 30px);
  letter-spacing: -0.025em;
  font-weight: 500;
  line-height: 1.05;
  color: var(--ink);
}
.contact-row__cell .big:hover { color: var(--signal); }
.contact-row__cell p { margin: 10px 0 0; font-size: 12px; color: var(--ink-mute); font-family: var(--font-mono); line-height: 1.5; }
@media (max-width: 800px) {
  .contact-row { grid-template-columns: 1fr; }
  .contact-row__cell { border-right: 0; border-bottom: 1px solid var(--rule); padding-right: 0; }
}

/* ---- Form ---- */
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 22px; }
.form .full { grid-column: 1 / -1; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-mute);
}
.field input, .field select, .field textarea {
  background: var(--bg);
  border: 1px solid var(--rule);
  padding: 13px 14px;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--ink);
  border-radius: 0;
  transition: border-color .15s var(--ease);
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 0; border-color: var(--signal); }
.field textarea { min-height: 130px; resize: vertical; }
.intent-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.intent-card {
  border: 1px solid var(--rule);
  padding: 15px;
  cursor: pointer;
  transition: border-color .15s var(--ease), background .15s var(--ease);
  display: flex; flex-direction: column; gap: 8px;
  min-height: 128px;
  background: var(--bg);
}
.intent-card:hover { border-color: var(--ink-mute); }
.intent-card.is-active { border-color: var(--signal); background: var(--signal-tint); }
.intent-card .ic-num {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em;
  color: var(--ink-mute); text-transform: uppercase;
}
.intent-card.is-active .ic-num { color: var(--signal); }
.intent-card h4 { font-family: var(--font-sans); font-size: 15px; font-weight: 500; letter-spacing: -0.012em; margin: 0; }
.intent-card p { margin: auto 0 0; font-size: 11px; color: var(--ink-mute); line-height: 1.4; font-family: var(--font-mono); }
@media (max-width: 800px) {
  .form { grid-template-columns: 1fr; }
  .intent-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---- Big product detail spec strip ---- */
.detail-hero {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: end;
}
@media (max-width: 900px) { .detail-hero { grid-template-columns: 1fr; gap: 28px; } }
.detail-hero__photo { height: clamp(300px, 38vw, 460px); }

/* product listing intro stat */
.list-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}
.list-meta .red { color: var(--signal); }

/* ---- Product selector (filter) ---- */
.selector {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 22px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 28px 40px;
  margin-bottom: 0;
}
.selector__group { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.selector__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.selector__chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--rule);
  padding: 8px 13px;
  cursor: pointer;
  transition: border-color .12s var(--ease), background .12s var(--ease), color .12s var(--ease);
}
.chip:hover { border-color: var(--ink-mute); }
.chip.is-active { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.chip--signal { border-color: var(--signal); color: var(--signal); }
.chip--signal.is-active { background: var(--signal); color: #FFF; border-color: var(--signal); }
.selector__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.selector__count span { color: var(--signal); }
.selector + .product-grid { margin-top: 40px; }
.selector__empty {
  padding: 48px 0;
  border-bottom: 1px solid var(--rule);
}
.selector__empty .mono { text-transform: none; font-size: 13px; letter-spacing: 0; }
@media (max-width: 700px) {
  .selector__count { margin-left: 0; width: 100%; }
}

/* ============================================================
   FX LAYER — premium motion (progressive enhancement)
   All gated on html.fx, which site-fx.js sets ONLY when
   prefers-reduced-motion is not "reduce". Base state stays
   fully visible for no-JS, print, and reduced-motion.
   ============================================================ */

/* scroll reveal */
html.fx [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  will-change: opacity, transform;
}
html.fx [data-reveal].is-in { opacity: 1; transform: none; }

/* hover lift on interactive cards */
html.fx .product-card,
html.fx .doc-row,
html.fx .ctaboard__row { transition: background .18s var(--ease), transform .3s var(--ease), box-shadow .3s var(--ease); }
html.fx .product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 26px 50px -30px rgba(10,10,10,.55);
  z-index: 2;
}
html.fx .caps__card { transition: transform .3s var(--ease); }
html.fx .caps__card:hover { transform: translateY(-3px); }

/* animated signal accent that draws across a card top on hover */
html.fx .product-card::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s var(--ease);
  z-index: 3;
}
html.fx .product-card:hover::after { transform: scaleX(1); }

/* nav underline grow */
html.fx .nav > a:not(.nav__cta), 
html.fx .nav__has-sub > a {
  background-image: linear-gradient(var(--signal), var(--signal));
  background-repeat: no-repeat;
  background-position: 14px 100%;
  background-size: 0% 1.5px;
  transition: color .15s var(--ease), background-size .28s var(--ease);
}
html.fx .nav > a:not(.nav__cta):hover,
html.fx .nav__has-sub > a:hover { background-size: calc(100% - 28px) 1.5px; }
html.fx .nav a.is-active { background-size: calc(100% - 28px) 1.5px; }

/* metric / number emphasis as it enters */
html.fx .metric-row__cell::before { transition: transform .5s var(--ease) .2s, opacity .5s; }
html.fx [data-reveal] .metric-row__cell::before,
html.fx .metric-row[data-reveal]::before { }

/* live readout in the header status bar */
.sys-readout { font-variant-numeric: tabular-nums; }
.sys-readout .blip { color: var(--signal); }

/* magnetic buttons get a smooth return */
html.fx .btn, html.fx .nav__cta { transition: background .15s var(--ease), color .15s var(--ease), border-color .15s var(--ease), transform .25s var(--ease); }

/* grid drift + scanline (very subtle, on the fixed bg) */
@media (prefers-reduced-motion: no-preference) {
  html.fx .bg-grid {
    animation: gridDrift 24s linear infinite;
  }
  @keyframes gridDrift {
    from { background-position: 0 0; }
    to { background-position: var(--gridcol) 0; }
  }
  html.fx .bg-grid::after {
    content: "";
    position: absolute;
    left: 0; right: 0;
    height: 220px;
    top: -220px;
    background: linear-gradient(to bottom, transparent, color-mix(in oklab, var(--signal) 5%, transparent), transparent);
    animation: scan 9s linear infinite;
    pointer-events: none;
  }
  @keyframes scan {
    0% { transform: translateY(0); opacity: 0; }
    8% { opacity: 1; }
    92% { opacity: 1; }
    100% { transform: translateY(120vh); opacity: 0; }
  }
}

/* hero headline word-reveal */
html.fx .page-hero h1 .word,
html.fx .hero__headline .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.5em);
  animation: wordRise .7s var(--ease) forwards;
}
@keyframes wordRise { to { opacity: 1; transform: none; } }

/* hero key word ("engineered"): resolve-into-focus + signal-red sheen sweep.
   Built by site-fx.js as .word--key > (__base + __sheen). Reflow-free
   (animates transform/filter/opacity only, never letter-spacing/width). */
html.fx .hero__headline .word--key,
html.fx .page-hero h1 .word--key {
  position: relative;
  display: inline-block;
  opacity: 0;
  transform: translateY(0.5em);
  animation: keyFocus 1.15s var(--ease) forwards;
  will-change: transform, filter, opacity;
}
@keyframes keyFocus {
  0%   { opacity: 0; filter: blur(18px); transform: translateY(0.16em) scale(1.06); }
  55%  { opacity: 1; filter: blur(0.6px); transform: translateY(0) scale(1.004);
         text-shadow: 0 0 26px color-mix(in oklab, var(--signal) 60%, transparent); }
  100% { opacity: 1; filter: blur(0); transform: none; text-shadow: 0 0 0 transparent; }
}
html.fx .hero__headline .word--key__base { display: inline-block; }
html.fx .hero__headline .word--key__sheen {
  position: absolute;
  left: 0;
  top: 0;
  pointer-events: none;
  color: transparent;
  background-image: linear-gradient(105deg,
    transparent 42%,
    color-mix(in oklab, var(--signal) 82%, #FFFFFF 18%) 50%,
    transparent 58%);
  background-size: 260% 100%;
  background-position: 175% 0;
  -webkit-background-clip: text;
  background-clip: text;
  opacity: 0;
  animation: keySheen 8s var(--ease) infinite;
}
@keyframes keySheen {
  0%        { background-position: 175% 0; opacity: 0; }
  4%        { opacity: 1; }
  22%       { background-position: -75% 0; opacity: 1; }
  28%, 100% { background-position: -75% 0; opacity: 0; }
}

/* loop dark-section cursor glow */
html.fx .loop {
  --gx: 50%; --gy: 50%;
}
html.fx .loop::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(420px circle at var(--gx) var(--gy), color-mix(in oklab, var(--signal) 14%, transparent), transparent 60%);
  opacity: 0;
  transition: opacity .4s var(--ease);
}
html.fx .loop:hover::before { opacity: 1; }

/* ---- ISO 9001 certification badge ---- */
.iso-badge {
  width: 46px; height: 46px;
  background: #FFFFFF;
  border-radius: 50%;
  padding: 5px;
  flex: 0 0 auto;
  display: block;
}
.cert-seal {
  position: absolute;
  right: 0;
  top: 116px;
  width: clamp(120px, 13vw, 168px);
  height: auto;
  filter: drop-shadow(0 8px 24px rgba(10,10,10,0.12));
}
@media (max-width: 1040px) {
  .cert-seal {
    position: static;
    display: block;
    margin: 28px 0 0;
    width: 124px;
  }
}

/* ============================================================
   UI LAYER — header tools, mobile nav, command palette
   ============================================================ */

/* header tools cluster (theme toggle, ⌘K, hamburger) */
.hdr-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 12px;
}
.hdr-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 11px;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: border-color .15s var(--ease), color .15s var(--ease), background .15s var(--ease);
}
.hdr-btn:hover { border-color: var(--ink); color: var(--signal); }
.hdr-btn svg { width: 15px; height: 15px; display: block; }
.hdr-btn kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  border: 1px solid var(--rule);
  padding: 1px 5px;
  color: var(--ink-mute);
  background: var(--bg-soft);
}
.hdr-btn--icon { padding: 0; width: 38px; }
.hdr-burger { display: none; }

@media (max-width: 1020px) {
  .site-header__inner .nav { display: none; }
  .hdr-tools { margin-left: auto; }
  .hdr-burger { display: inline-flex; }
  .hdr-search-label { display: none; }
  .hdr-btn--search kbd { display: none; }
}

/* mobile slide-down menu */
.mnav {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  padding: 24px var(--pad-x) 40px;
  transform: translateY(-100%);
  transition: transform .42s var(--ease);
  overflow-y: auto;
  visibility: hidden;
}
.mnav.open { transform: translateY(0); visibility: visible; }
.mnav__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 24px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--rule);
}
.mnav__links { display: flex; flex-direction: column; }
.mnav__links a {
  font-family: var(--font-sans);
  font-size: clamp(28px, 8vw, 44px);
  letter-spacing: -0.04em;
  font-weight: 500;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
}
.mnav__links a small {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.mnav__links a:active, .mnav__links a:hover { color: var(--signal); }
.mnav__cta {
  margin-top: 28px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.mnav__foot {
  margin-top: auto;
  padding-top: 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.06em;
}

/* command palette */
.cmdk {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  background: color-mix(in oklab, #000 52%, transparent);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.cmdk.open { display: flex; }
.cmdk__box {
  width: min(640px, 92vw);
  max-height: 70vh;
  background: var(--bg);
  border: 1px solid var(--ink);
  display: flex;
  flex-direction: column;
  box-shadow: 0 40px 100px -30px rgba(0,0,0,.6);
}
.cmdk__input-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--rule);
}
.cmdk__input-wrap svg { width: 18px; height: 18px; color: var(--ink-mute); flex: 0 0 auto; }
.cmdk__input {
  flex: 1;
  border: 0;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--ink);
  outline: 0;
}
.cmdk__input::placeholder { color: var(--ink-mute); }
.cmdk__hint {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-mute);
  border: 1px solid var(--rule);
  padding: 2px 6px;
}
.cmdk__list { overflow-y: auto; padding: 8px; }
.cmdk__group {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 12px 12px 6px;
}
.cmdk__item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 12px;
  cursor: pointer;
  border-left: 2px solid transparent;
}
.cmdk__item .ci-key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--signal);
  width: 30px;
  flex: 0 0 auto;
}
.cmdk__item .ci-label { font-family: var(--font-sans); font-size: 15px; font-weight: 500; letter-spacing: -0.01em; }
.cmdk__item .ci-sub { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); margin-left: auto; text-transform: uppercase; letter-spacing: 0.06em; }
.cmdk__item.sel, .cmdk__item:hover { background: var(--bg-soft); border-left-color: var(--signal); }
.cmdk__empty { padding: 28px 18px; font-family: var(--font-mono); font-size: 12px; color: var(--ink-mute); }

/* theme transition smoothing */
html.theming, html.theming * { transition: background-color .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease) !important; }

/* dark-mode legibility guards (header nav + tools) */
[data-theme="dark"] .nav > a:not(.nav__cta),
[data-theme="dark"] .nav__has-sub > a { color: #F4F4F2; }
[data-theme="dark"] .nav a.is-active { color: var(--signal); }
[data-theme="dark"] .hdr-btn { color: #F4F4F2; }
[data-theme="dark"] .nav__sub { background: #141414; border-color: #F4F4F2; }
[data-theme="dark"] .iso-badge { background: #F4F4F2; }

/* ---- UL Prospector callout ---- */
.ulp {
  display: grid;
  grid-template-columns: 1.5fr auto;
  gap: 32px;
  align-items: center;
  border: 1px solid var(--ink);
  border-left: 3px solid var(--signal);
  padding: clamp(28px, 4vw, 44px);
  background: var(--bg);
  transition: background .15s var(--ease);
}
.ulp:hover { background: var(--bg-soft); }
.ulp h3 { margin: 14px 0 0; }
.ulp__r { display: flex; flex-direction: column; align-items: flex-end; gap: 16px; }
.ulp__badge {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 8px 14px;
  white-space: nowrap;
}
.ulp__badge b { color: var(--signal); }
@media (max-width: 760px) {
  .ulp { grid-template-columns: 1fr; gap: 24px; }
  .ulp__r { flex-direction: row; align-items: center; justify-content: space-between; }
}

/* ---- Dynamic brand mark (site-wide, motion-safe) ---- */
.brand__mark svg { transition: transform .45s var(--ease); transform-origin: center; will-change: transform; }
.brand__mark svg rect { transform-box: fill-box; transform-origin: center; }
@media (prefers-reduced-motion: no-preference) {
  .brand__mark svg rect { animation: markPulse 2.6s ease-in-out infinite; }
  @keyframes markPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.62); }
  }
  .brand:hover .brand__mark svg { transform: rotate(-7deg) scale(1.1); }
  .brand:hover .brand__mark svg rect { animation: none; opacity: 1; transform: scale(1.35); }
  /* boot-in: mark scales up once on load */
  html.fx .site-header .brand__mark svg { animation: markBoot .7s var(--ease); }
  @keyframes markBoot { from { transform: scale(0) rotate(-30deg); opacity: 0; } to { transform: scale(1) rotate(0); opacity: 1; } }
}

/* ============================================================
   Animated polymer-network hero backdrop (viz.js -> site-fx.js)
   ============================================================ */
.hero.has-net, .page-hero.has-net { position: relative; }
.hero.has-net > .wrap, .page-hero.has-net > .wrap { position: relative; z-index: 1; }
.viz-net {
  position: absolute; inset: 0; z-index: 0; overflow: hidden; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 44px 44px;
}
.viz-net canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.viz-vig {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(78% 74% at 38% 42%, transparent 52%, rgba(0,0,0,0.62) 100%);
}
/* network is built for the dark aesthetic; hide it in opt-in light mode */
html:not([data-theme="dark"]) .viz-net { display: none; }