/* ==========================================================================
   SkyComm Systems — stylesheet
   v15 · landing + product layer (v9's three stacked patch layers merged)
   Order: tokens · base · header · hero · sections · components · responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  /* surfaces, darkest → lightest */
  --ink:        #071016;   /* page */
  --ink-2:      #0b171f;   /* alternating section */
  --panel:      #0a151c;   /* cards sitting on ink-2 */
  --line:       #27404d;
  --line-soft:  rgba(66, 103, 119, .5);

  /* type */
  --text:       #eef7f8;
  --text-2:     #c6d5d9;   /* lead paragraphs */
  --muted:      #9bb0b8;   /* body copy */
  --muted-2:    #8198a1;   /* fine print */

  /* accents */
  --cyan:       #28d4e8;
  --green:      #36d49a;
  --amber:      #f4a23a;

  /* layout */
  --max:        1240px;
  --pad:        clamp(1.25rem, 4vw, 4rem);
  --gutter:     max(var(--pad), calc((100vw - var(--max)) / 2));
  --header-h:   76px;

  /* vertical rhythm — one scale, used everywhere */
  --section-y:  clamp(4rem, 7vw, 6.5rem);

  /* Self-hosting Inter?  Drop the woff2 into assets/ and uncomment the
     @font-face below; --sans then picks it up automatically. Loading it from
     a third-party CDN is deliberately avoided: it is a render-blocking
     external request and, for an EU-established company, a GDPR exposure. */
  --sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
          "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/*
@font-face {
  font-family: "Inter var";
  src: url("assets/inter-variable.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}
:root { --sans: "Inter var", ui-sans-serif, system-ui, -apple-system, sans-serif; }
*/

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--ink);
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font: 400 1rem/1.55 var(--sans);
  font-synthesis-weight: none;
}

img { display: block; max-width: 100%; height: auto; }
a   { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

/* Anchor targets clear the fixed header exactly. */
section[id] { scroll-margin-top: calc(var(--header-h) + 8px); }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }

.skip-link {
  position: fixed; left: 1rem; top: -5rem; z-index: 1000;
  padding: .75rem 1rem;
  background: var(--cyan); color: var(--ink);
  font-weight: 800; text-decoration: none;
}
.skip-link:focus { top: 1rem; }

h1, h2, h3 { text-wrap: balance; }

h2 {
  margin: .5rem 0 1.25rem;
  font-size: clamp(2rem, 3.5vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -.035em;
}

h3 { margin: 0 0 .35rem; font-size: 1rem; line-height: 1.3; }

p { color: var(--muted); text-wrap: pretty; }

.eyebrow,
.section-kicker {
  color: var(--cyan);
  font-size: .875rem;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   3. Buttons
   -------------------------------------------------------------------------- */
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 50px;
  padding: .85rem 1.5rem;
  border: 1px solid var(--cyan);
  font-size: .8rem; font-weight: 900; letter-spacing: .06em;
  text-transform: uppercase; text-decoration: none;
  transition: transform .2s, background-color .2s, color .2s;
}
.button.primary   { background: var(--cyan);            color: var(--ink); }
.button.secondary { background: rgba(7, 16, 22, .55);   color: var(--cyan); }
.button:hover     { transform: translateY(-2px); }
.button.secondary:hover { background: var(--cyan); color: var(--ink); }

/* --------------------------------------------------------------------------
   4. Header / navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h);
  padding: 0 var(--gutter);
  border-bottom: 1px solid transparent;
  transition: background-color .25s, border-color .25s;
}
.site-header.scrolled {
  background: rgba(7, 16, 22, .92);
  border-color: rgba(82, 129, 145, .3);
  backdrop-filter: blur(16px);
}

.brand { display: flex; align-items: center; }
.brand img { width: 156px; height: auto; }

.site-nav { display: flex; align-items: center; gap: 1.7rem; }
/* Full-height hit area: the bare text was a 21px target, under WCAG 2.2
   2.5.8's 24px minimum. */
.site-nav a {
  position: relative;
  display: inline-flex; align-items: center; min-height: 44px;
  color: #d7e2e5;
  font-size: .84rem; font-weight: 700; letter-spacing: .04em;
  text-decoration: none;
  transition: color .2s;
}
.site-nav a:not(.nav-cta):hover { color: var(--cyan); }

/* Scroll-spy: mark the section currently in view. */
.site-nav a[aria-current="true"]:not(.nav-cta) { color: var(--cyan); }
.site-nav a[aria-current="true"]:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 10px;
  height: 1px; background: var(--cyan);
}

.nav-cta { padding: .75rem 1.05rem; background: var(--cyan); color: var(--ink) !important; }
.nav-cta:hover { background: #4ce2f4; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px; padding: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  cursor: pointer;
}
.nav-toggle span {
  display: block; width: 20px; height: 2px; margin: 5px auto;
  background: var(--text);
  transition: transform .2s, opacity .2s;
}

/* --------------------------------------------------------------------------
   5. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  display: grid; align-items: center;
  min-height: min(100svh, 900px);
  padding: calc(var(--header-h) + var(--section-y)) 0 var(--section-y);
  isolation: isolate;
}
.hero-media, .hero-overlay, .hero-grid { position: absolute; inset: 0; }
.hero-media { z-index: -3; }
.hero-media img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: 68% center;
  filter: saturate(.72) contrast(1.04);
}
.hero-overlay {
  z-index: -2;
  /* Stops are anchored to the text column, not the viewport, so the copy
     stays over darkness on a 2560px screen as well as a 1280px one. */
  background:
    linear-gradient(90deg,
      #071016 0,
      rgba(7,16,22,.96) calc(var(--gutter) + 420px),
      rgba(7,16,22,.45) calc(var(--gutter) + 900px),
      rgba(7,16,22,.15) 100%),
    linear-gradient(0deg, #071016 0%, transparent 30%);
}
.hero-grid {
  z-index: -1; opacity: .16;
  background-image:
    linear-gradient(rgba(40,212,232,.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(40,212,232,.22) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(90deg, black, transparent calc(var(--gutter) + 900px));
}

@media (max-height: 760px) and (min-width: 981px) {
  .hero { padding-top: calc(var(--header-h) + 2rem); padding-bottom: 2.5rem; }
}
.hero-content {
  width: min(940px, calc(100% - 2 * var(--pad)));
  margin-left: var(--gutter);
}
/* Sized so the longest word ("COMMUNICATIONS") fits the measure. At v9's
   6vw it was 850px inside a 760px box and overflowed into the bright half
   of the photograph. */
.hero h1 {
  margin: 1rem 0 1.25rem;
  font-size: clamp(1.95rem, 4.8vw, 4.5rem);
  line-height: 1.04; letter-spacing: -.045em;
  text-transform: uppercase;
  text-wrap: pretty;
}
/* Deliberate break on wide screens; natural wrapping below. */
.h1-break { display: none; }
.hero-copy {
  max-width: 590px; margin: 0 0 2rem;
  color: var(--text-2);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }

.hero-tags {
  display: flex; flex-wrap: wrap; gap: 1.5rem;
  margin: 2rem 0 0; padding: 0;
  list-style: none;
}
.hero-tags li {
  color: var(--text-2);
  font-size: .75rem; font-weight: 800; letter-spacing: .1em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   6. Section shell
   -------------------------------------------------------------------------- */
.section-pad { padding: var(--section-y) var(--gutter); }

.section-heading {
  display: flex; justify-content: space-between; align-items: start;
  gap: 3rem;
  margin-bottom: 2.5rem;
}
.section-heading > div { min-width: 0; }
.section-heading h2 { max-width: 880px; margin-bottom: 0; }
.section-heading > p { max-width: 360px; margin: 2.25rem 0 0; }

/* --------------------------------------------------------------------------
   7. 01 · Mission reality
   -------------------------------------------------------------------------- */
.statement {
  display: grid; gap: 2.5rem;
  border-top: 1px solid var(--line);
  background: var(--ink-2);
}
.statement-intro {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 4rem; align-items: end;
}
.statement-intro h2 { margin: 0; font-size: clamp(2.25rem, 4.1vw, 4rem); text-wrap: balance; }
.statement-intro > p { max-width: 430px; margin: 0 0 .4rem; font-size: 1.125rem; }

.mission-image {
  position: relative;
  height: clamp(240px, 27vw, 340px);
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}
.mission-image::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(7,16,22,.2), transparent 48%),
    linear-gradient(0deg, rgba(7,16,22,.88), transparent 45%);
}
.mission-image img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center 54%;
  filter: saturate(.76) contrast(1.05);
}
.mission-image figcaption {
  position: absolute; z-index: 1;
  left: clamp(1rem, 2.5vw, 2rem); bottom: clamp(1rem, 2.5vw, 1.75rem);
  max-width: 520px;
  color: #d8e5e8;
  font-size: .8125rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase;
}

.mission-priorities {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.5rem; margin-top: .5rem;
}
.mission-priorities article { padding-top: 1.5rem; border-top: 1px solid var(--line); }
.mission-priorities h3 { margin: 1.5rem 0 .75rem; font-size: 1.5rem; letter-spacing: -.02em; }
.mission-priorities p { max-width: 330px; margin: 0; }
.priority-label { color: var(--cyan); font-size: .875rem; }

/* --------------------------------------------------------------------------
   8. 02 · Why SkyComm
   -------------------------------------------------------------------------- */
.advantage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(460px, 1fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: stretch;
  padding: var(--section-y) var(--gutter);
  background: var(--ink);
}
.advantage-image {
  position: relative;
  min-height: clamp(460px, 52svh, 620px);
  border: 1px solid var(--line);
  overflow: hidden;
}
.advantage-image img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.advantage-image::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, transparent 45%, var(--ink)),
    linear-gradient(0deg, var(--ink), transparent 35%);
}
.advantage-panel { align-self: center; }
.advantage-panel h2 { max-width: 560px; }

.metric-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1px; margin-block: 1.75rem;
  background: var(--line); border: 1px solid var(--line);
}
.metric-grid div { min-height: 100px; padding: 1.15rem; background: #0c1921; }
.metric-grid strong {
  display: block;
  color: var(--cyan);
  font-size: clamp(1.65rem, 2.5vw, 2.4rem);
  letter-spacing: -.04em;
}
/* Hard, measured figures read cyan; qualitative ones stay neutral so the
   two are not mistaken for each other. */
.metric-grid div.is-soft strong { color: var(--text); }
.metric-grid span { display: block; margin-top: .5rem; color: var(--muted); font-size: .875rem; }

.check-list { display: grid; gap: .65rem; margin: 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 1.3rem; color: #cbdadd; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: .65em;
  width: 6px; height: 6px; background: var(--cyan);
}

/* --------------------------------------------------------------------------
   9. 03 · System architecture
   -------------------------------------------------------------------------- */
.system { background: var(--ink-2); }
.architecture {
  display: grid; grid-template-columns: minmax(0, 1fr) 140px minmax(0, 1fr);
  gap: 1rem; align-items: stretch;
}
.stack {
  display: grid; grid-template-rows: auto 1fr 1fr auto;
  gap: .75rem; min-width: 0; padding: 1rem;
  border: 1px solid var(--line);
  background: var(--ink);
}
.stack-label {
  padding: .4rem .6rem;
  color: var(--green);
  font-size: .8125rem; font-weight: 900; letter-spacing: .14em;
  text-transform: uppercase;
}
.ground .stack-label { color: var(--cyan); }

.component {
  color: inherit; text-decoration: none;
  transition: border-color .2s, background-color .2s;
  display: grid; grid-template-columns: 42% 1fr;
  gap: 1rem; align-items: center;
  min-height: 150px; padding: 1rem;
  border: 1px solid var(--line-soft);
  background: var(--panel);
}
.component > div { min-width: 0; }
.component img { width: 100%; height: auto; max-height: 115px; object-fit: contain; }
.component p { margin: 0; font-size: .88rem; }
.component small { display: block; margin-top: .5rem; color: var(--muted-2); overflow-wrap: anywhere; }
.component.compact { min-height: 105px; }
.component.compact img { max-height: 75px; }
a.component:hover, a.component:focus-visible { border-color: var(--cyan); background: #0c1921; }
.component-video   { border-left: 2px solid var(--cyan); }
.component-control { border-left: 2px solid var(--green); }

.mission-link { display: grid; align-content: center; gap: 6.2rem; }
.mission-link div {
  display: grid; gap: .7rem;
  color: #c8d8dc; font-size: .75rem; font-weight: 800; text-align: center;
}
.mission-link i { position: relative; display: block; height: 1px; background: var(--cyan); }
.mission-link i::before,
.mission-link i::after {
  content: ""; position: absolute; top: -3px;
  width: 7px; height: 7px;
  border-top: 1px solid var(--cyan); border-right: 1px solid var(--cyan);
}
.mission-link i::before { left: 0;  transform: rotate(-135deg); }
.mission-link i::after  { right: 0; transform: rotate(45deg); }
.mission-link div:first-child  i::before { display: none; }
.mission-link div:nth-child(2) i::after  { display: none; }
/* Colour only — the chevrons are drawn with borders, so giving the
   pseudo-elements a background fills them into solid diamonds. */
.mission-link div:nth-child(2) i { background: var(--green); }
.mission-link div:nth-child(2) i::before,
.mission-link div:nth-child(2) i::after { border-color: var(--green); }

/* --------------------------------------------------------------------------
   11. 04 · Resilience
   -------------------------------------------------------------------------- */
.resilience {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 8vw, 8rem); align-items: start;
  background: var(--ink-2);
}
.feature-lines { margin-top: 1.5rem; border-top: 1px solid var(--line); }
.feature-lines > div { display: grid; gap: .3rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.feature-lines h3 { color: var(--text); }
.feature-lines p  { margin: 0; }

.spectrum { margin: 3.4rem 0 0; }
.spectrum img { width: 100%; border: 1px solid var(--line); }
.spectrum figcaption { padding: 1rem 0; color: var(--muted); font-size: .875rem; }

/* --------------------------------------------------------------------------
   12. 05 · Integration
   -------------------------------------------------------------------------- */
.process {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; margin: 0; padding: 1px;
  background: var(--line); list-style: none;
}
.integration { background: var(--ink); }
.process li { min-height: 240px; padding: 1.5rem; background: var(--ink-2); }
.process span {
  display: block; margin-bottom: 2.5rem;
  color: var(--cyan); font-size: 1rem; font-weight: 900;
}
/* Neutral, not cyan: cyan is the link/CTA colour and these are not links. */
.integration-note {
  display: flex; flex-wrap: wrap; gap: .6rem;
  margin-top: 1.5rem;
}
.integration-note span {
  padding: .4rem .7rem;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: .8125rem; font-weight: 700; letter-spacing: .04em;
}

/* --------------------------------------------------------------------------
   13. 06 · Evidence
   -------------------------------------------------------------------------- */
.evidence { background: var(--ink-2); }
.evidence-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); }
.evidence-grid article { min-height: 135px; padding: 1.25rem; background: var(--ink); }
.evidence-grid strong {
  color: var(--cyan);
  font-size: clamp(1.8rem, 3vw, 3rem); letter-spacing: -.04em;
}
/* The one figure that is modelled rather than measured is flagged, in colour
   and in the footnote. */
.evidence-grid article.is-modelled strong { color: var(--amber); }
.evidence-grid p { margin-bottom: 0; font-size: .875rem; }

.evidence-context {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 1px; margin-top: 1px; background: var(--line);
}
.evidence-context img { width: 100%; height: 100%; min-height: 260px; object-fit: cover; }
.evidence-context div { padding: 1.5rem 2rem; background: var(--ink); }
.evidence-context ul { padding-left: 1.2rem; color: var(--muted); }
.evidence-context li + li { margin-top: .75rem; }

.footnote { max-width: 850px; margin: 1rem 0 0; font-size: .8125rem; }

/* --------------------------------------------------------------------------
   14. 07 · Supply
   -------------------------------------------------------------------------- */
.supply {
  background: var(--ink);
  display: grid; grid-template-columns: 1.2fr .8fr;
  gap: clamp(3rem, 8vw, 8rem); align-items: center;
}
.capacity { display: grid; margin-block: 1.75rem; }
.capacity div {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: 1rem; align-items: center;
  padding: .85rem 0; border-bottom: 1px solid var(--line);
}
.capacity strong { color: var(--text); font-size: 1.5rem; line-height: 1.15; }
.capacity span   { color: var(--muted); font-size: .875rem; }

.supply-image { position: relative; overflow: hidden; }
.supply-image::after {
  content: ""; position: absolute; inset: 0;
  border: 1px solid rgba(40, 212, 232, .45); pointer-events: none;
}
.supply-image img { width: 100%; height: 500px; object-fit: cover; }

/* --------------------------------------------------------------------------
   15. CTA + footer
   -------------------------------------------------------------------------- */
.cta {
  display: grid; gap: 2rem;
  border-top: 1px solid var(--line);
  background: var(--ink-2);
  text-align: left;
}
.cta-content { min-width: 0; }
.cta h2 { max-width: 800px; font-size: clamp(2.5rem, 5vw, 4.5rem); line-height: 1.08; }
.cta p  { max-width: 640px; margin-bottom: 0; font-size: 1.125rem; }

.cta-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 2rem; }
.cta-mail { font-size: clamp(.85rem, 1.4vw, 1rem); letter-spacing: .04em; text-transform: none; overflow-wrap: anywhere; }
.copy-address {
  padding: .85rem 1rem; min-height: 50px;
  border: 1px solid var(--line); background: transparent;
  color: var(--muted); font: inherit; font-size: .8rem; font-weight: 700; letter-spacing: .04em;
  cursor: pointer; transition: color .2s, border-color .2s;
}
.copy-address:hover { color: var(--text); border-color: var(--muted); }
.copy-address.is-done { color: var(--green); border-color: var(--green); }

.site-footer {
  display: grid; grid-template-columns: 1fr auto auto;
  gap: 2rem; align-items: center;
  padding: 2rem var(--gutter);
  border-top: 1px solid var(--line);
}
.footer-brand { font-size: 1.2rem; font-weight: 700; letter-spacing: -.025em; text-decoration: none; }
.footer-brand span { color: var(--muted); font-weight: 400; }
.site-footer p { margin: 0; font-size: .875rem; }

/* --------------------------------------------------------------------------
   16. Reveal on scroll
   (v9 declared this inert — opacity:1 in both states — so the observer ran
    over 20 nodes for no effect. Now it does what it was named for.)
   -------------------------------------------------------------------------- */
/* Hidden only once script.js has run and taken responsibility for revealing.
   If the script never arrives, nothing is ever hidden. */
.js-ready .reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
}
.js-ready .reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js-ready .reveal, .js-ready .reveal.visible { opacity: 1; transform: none; transition: none; }
  .button, .site-header, .nav-toggle span { transition: none; }
  .button:hover { transform: none; }
}

/* --------------------------------------------------------------------------
   17. Responsive
   -------------------------------------------------------------------------- */

/* Narrow desktop: stacks lose their side-by-side product rows. */
@media (min-width: 981px) and (max-width: 1200px) {
  .architecture { grid-template-columns: minmax(0, 1fr) 100px minmax(0, 1fr); }
  .component { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .component img { max-height: 90px; }
}

/* Why-SkyComm needs its copy column wider than the image allows below this. */
@media (max-width: 1180px) {
  .advantage { grid-template-columns: 1fr; gap: 2.5rem; padding-inline: var(--pad); }
  .advantage-image { min-height: clamp(340px, 54vw, 520px); }
  .advantage-image::after { background: linear-gradient(0deg, var(--ink), transparent 42%); }
  .advantage-panel h2 { max-width: 760px; }
}

@media (min-width: 981px) {
  .h1-break { display: inline; }
}

@media (max-width: 980px) {
  /* Off-canvas navigation */
  .site-nav {
    position: fixed; inset: var(--header-h) 0 auto;
    display: none; flex-direction: column; align-items: stretch;
    padding: 1.5rem var(--pad) 2rem;
    background: var(--ink);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.open { display: flex; }
  body.nav-open .site-header { background: var(--ink); border-color: var(--line); }
  .site-nav a { padding: .6rem 0; }
  .site-nav a[aria-current="true"]:not(.nav-cta)::after { display: none; }
  .nav-cta { padding: .9rem 1rem !important; text-align: center; }
  .nav-toggle { display: block; }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:last-child  { transform: translateY(-3.5px) rotate(-45deg); }
  /* Page must not scroll behind the open menu. */
  body.nav-open { overflow: hidden; }

  .hero { min-height: 100svh; }
  .hero-media, .hero-overlay, .hero-grid { inset: 0; }
  .hero-media { border-right: 0; }

  .statement-intro { grid-template-columns: 1fr; gap: 1.5rem; }
  .mission-priorities { gap: 1.5rem; }

  .architecture { grid-template-columns: 1fr; }
  .mission-link { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; padding: 1.5rem 0; }
  .mission-link div { grid-template-rows: auto 54px; justify-items: center; align-items: start; gap: .75rem; }
  .mission-link i { width: 1px; height: 54px; }
  .mission-link i::before, .mission-link i::after { left: -3px; right: auto; }
  .mission-link i::before { top: 0; transform: rotate(-45deg); }
  .mission-link i::after  { top: auto; bottom: 0; transform: rotate(135deg); }


  .resilience, .supply { grid-template-columns: 1fr; gap: 2.5rem; }
  .spectrum { margin-top: 0; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .evidence-grid { grid-template-columns: repeat(2, 1fr); }
  .evidence-context { grid-template-columns: 1fr; }
  .evidence-context img { height: 300px; }
}

@media (max-width: 640px) {
  :root { --header-h: 66px; }

  .brand img { width: 136px; }

  .hero-media img { object-position: 62% center; }
  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(7,16,22,.98), rgba(7,16,22,.72)),
      linear-gradient(0deg, #071016, transparent 45%);
  }
  /* Fluid size alone let COMMUNICATIONS run to the edge. The floor is set so
     the longest word still fits a 320px viewport; break-word is the backstop
     below that, because a broken word beats a horizontally scrolling page. */
  .hero h1 { font-size: clamp(1.7rem, 8.2vw, 3.5rem); overflow-wrap: break-word; }
  .hero-tags { gap: .9rem 1.25rem; }

  .section-heading { display: block; }
  .section-heading > p { margin-top: 1rem; }

  .statement-intro h2 { font-size: 2.25rem; }
  .mission-image { height: 250px; }
  .mission-image img { object-position: 58% center; }
  .mission-image figcaption { max-width: 290px; font-size: .75rem; }
  .mission-priorities { grid-template-columns: 1fr; gap: 2rem; }
  .mission-priorities h3 { margin-top: .75rem; }

  /* v9 declared this twice in one block (1fr 1fr then 1fr); the second won
     and stacked four tiles into a 600px column. Two columns fit fine. */
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .metric-grid strong { font-size: 1.5rem; }

  .component { grid-template-columns: 38% 1fr; }

  .process { grid-template-columns: 1fr; }
  .process li { min-height: auto; }
  .process span { margin-bottom: 1.25rem; }

  .evidence-grid { grid-template-columns: repeat(2, 1fr); }
  .evidence-context div { padding: 1.5rem; }

  .capacity div { grid-template-columns: 1fr; gap: .25rem; }
  .supply-image img { height: 360px; }


  .site-footer { grid-template-columns: 1fr; gap: 1rem; }
}

@media (max-width: 380px) {
  .evidence-grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   18. Print
   -------------------------------------------------------------------------- */
@media print {
  .site-header, .skip-link, .hero-grid, .hero-overlay { display: none !important; }
  body { background: #fff; color: #000; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  a[href^="mailto:"]::after { content: " (" attr(href) ")"; }
}

/* ==========================================================================
   v15 · Product layer: landing grid, catalogue, detail pages
   ========================================================================== */

/* --- shared bits ---------------------------------------------------------- */
.site-header.solid { background: var(--ink); border-color: var(--line); }
.site-nav a[aria-current="page"]:not(.nav-cta) { color: var(--cyan); }

.footer-nav { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.footer-nav a { display: inline-block; padding: .35rem 0; color: var(--muted); font-size: .875rem; text-decoration: none; }
.footer-nav a:hover { color: var(--cyan); }
.site-footer { grid-template-columns: auto 1fr auto; }

.chip-row { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .3rem .6rem;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
}
.dot { width: 7px; height: 7px; background: var(--muted); }
.dot.cyan  { background: var(--cyan); }
.dot.green { background: var(--green); }
.dot.slate { background: #7e97a3; }

.kind  { margin: .25rem 0 0; color: var(--text-2); font-size: 1rem; }
.short { margin: .75rem 0 0; color: var(--muted); font-size: .9375rem; }
.more  {
  display: inline-block; margin-top: 1.1rem;
  color: var(--cyan); font-size: .8125rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase;
  text-decoration: none;
}
.more:hover { color: var(--text); }

.keyfigs { display: flex; flex-wrap: wrap; gap: .4rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.keyfigs li {
  padding: .3rem .55rem;
  border: 1px solid var(--line);
  color: var(--text-2);
  font-size: .8125rem; font-weight: 700; font-variant-numeric: tabular-nums;
}

.pt-0 { padding-top: 0 !important; }

/* --- landing: product grid ------------------------------------------------- */
.products-index { background: var(--ink); }
.cat-legend { display: flex; flex-wrap: wrap; gap: .75rem 2rem; margin: -1rem 0 2rem; padding: 0; list-style: none; color: var(--muted); font-size: .875rem; }
.cat-legend li { display: inline-flex; align-items: center; gap: .55rem; }
.cat-legend b { color: var(--text-2); font-weight: 700; }

/* Cards built exactly like the diagram components in 03: own border, own
   background, inner padding, cyan on hover. The photo sits inside the frame. */
.pgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.pcard {
  display: flex; flex-direction: column; min-width: 0;
  padding: 1rem;
  border: 1px solid var(--line-soft);
  background: var(--panel);
  transition: border-color .2s, background-color .2s;
}
.pcard:hover, .pcard:focus-within { border-color: var(--cyan); background: #0c1921; }
.pcard:hover h3 a { color: var(--cyan); }
.pcard-art {
  --art-pad: 1.25rem;
  position: relative; display: block; overflow: hidden;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line-soft);
  background: radial-gradient(ellipse at center, #142b34, #071016 72%);
  transition: border-color .2s;
}
.pcard:hover .pcard-art { border-color: var(--line); }
.pcard-art img { position: absolute; inset: var(--art-pad); width: calc(100% - 2 * var(--art-pad)); height: calc(100% - 2 * var(--art-pad)); object-fit: contain; }
.pcard-body { display: flex; flex-direction: column; flex: 1; padding: 1.1rem .25rem .25rem; }
.pcard-body h3 { margin: .9rem 0 0; font-size: 1.5rem; letter-spacing: -.02em; }
.pcard-body h3 a { color: inherit; text-decoration: none; transition: color .2s; }
.pcard-body .more { margin-top: auto; padding-top: 1.25rem; }

.products-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
  margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--line);
}
.products-foot p { max-width: 620px; margin: 0; }

/* --- sub-pages: page frame --------------------------------------------------- */
.page { background: var(--ink); }
.page-head { padding-top: calc(var(--header-h) + 2.5rem) !important; padding-bottom: 2.5rem !important; }
.page h1 { margin: .35rem 0 .25rem; font-size: clamp(2.25rem, 4.5vw, 4rem); line-height: 1.05; letter-spacing: -.04em; }
.crumbs { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 2rem; padding: 0; list-style: none; color: var(--muted-2); font-size: .8125rem; }
.crumbs li + li::before { content: "/"; margin-right: .5rem; color: var(--line); }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current] { color: var(--text-2); }

/* --- product detail: hero ---------------------------------------------------- */
.product-hero { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.product-art.hero-art {
  --art-pad: clamp(1.5rem, 4vw, 3.5rem);
  display: block;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  background: radial-gradient(ellipse at center, #142b34, #071016 72%);
}
.product-art.hero-art { position: relative; overflow: hidden; }
.product-art.hero-art img { position: absolute; inset: var(--art-pad, 1.5rem); width: calc(100% - 2 * var(--art-pad, 1.5rem)); height: calc(100% - 2 * var(--art-pad, 1.5rem)); object-fit: contain; }
.product-hero-copy .lead { margin: 1rem 0 1.75rem; color: var(--text-2); font-size: 1.2rem; }
.product-hero-copy .kind { font-size: 1.05rem; }

.metric-grid.highlights { grid-template-columns: repeat(4, 1fr); margin: 2.5rem 0 0; }
.metric-grid.highlights strong { display: flex; align-items: baseline; gap: .3rem; flex-wrap: wrap; }
.metric-grid.highlights .is-long strong { font-size: clamp(1.3rem, 1.8vw, 1.6rem); letter-spacing: -.02em; }
.metric-grid.highlights small { color: var(--text-2); font-size: .5em; font-weight: 700; letter-spacing: .04em; }

/* --- product detail: subnav ------------------------------------------------- */
.subnav {
  position: sticky; top: var(--header-h); z-index: 10;
  display: flex; flex-wrap: wrap; gap: .25rem 1.75rem;
  padding: .6rem var(--gutter);
  background: rgba(7, 16, 22, .94); backdrop-filter: blur(12px);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.subnav a {
  padding: .45rem 0;
  color: var(--muted);
  font-size: .78rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; text-decoration: none;
}
.subnav a:hover, .subnav a[aria-current="true"] { color: var(--cyan); }
.product-page section[id] { scroll-margin-top: calc(var(--header-h) + 56px); }

/* --- product detail: content blocks ------------------------------------------ */
.problem-solution { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.problem-solution article { padding: clamp(1.5rem, 3vw, 2.25rem); background: var(--ink-2); }
.problem-solution article p { margin: .75rem 0 0; color: var(--text-2); font-size: 1.05rem; }
.problem-solution .is-solution { background: #0c1921; border-left: 2px solid var(--cyan); }
.problem-solution .is-solution .section-kicker { color: var(--green); }

.two-col { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(280px, .9fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.prose h2 { margin-top: .5rem; }
.prose p { max-width: 62ch; color: var(--text-2); font-size: 1.05rem; }
.aside { padding: 1.5rem; border: 1px solid var(--line); background: var(--ink-2); }
.aside h3 { margin: 0 0 1rem; font-size: 1rem; }
.aside .check-list li { font-size: .9375rem; }
.path { margin: 0; padding-left: 1.25rem; color: #cbdadd; font-size: .9375rem; }
.path li + li { margin-top: .6rem; }
.path li::marker { color: var(--cyan); font-weight: 800; }

.spec-section { background: var(--ink-2); }
.spec-groups { columns: 2; column-gap: 1.5rem; }
.spec-group { break-inside: avoid; margin-bottom: 1.5rem; border: 1px solid var(--line); background: var(--panel); }
.spec-group h3 {
  margin: 0; padding: .7rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--cyan); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
}
.spec-table { width: 100%; border-collapse: collapse; font-size: .9375rem; }
.spec-table th, .spec-table td { padding: .7rem 1rem; vertical-align: top; text-align: left; border-bottom: 1px solid var(--line); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { width: 42%; color: var(--muted); font-weight: 400; }
.spec-table td { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }
.spec-table td.tbc { color: var(--muted-2); font-style: italic; font-weight: 400; }

.pairs { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 1rem; margin-top: 1.5rem; }
.pair { display: grid; grid-template-columns: 120px 1fr; gap: 1rem; align-items: center; padding: 1rem; border: 1px solid var(--line); background: var(--ink-2); color: inherit; text-decoration: none; transition: background-color .2s, border-color .2s; }
.pair:hover { border-color: var(--cyan); }
.pair:hover { background: #0c1921; }
.pair-art { --art-pad: .5rem; display: block; aspect-ratio: 3 / 2; background: radial-gradient(ellipse at center, #142b34, #071016 72%); }
.pair-art { position: relative; overflow: hidden; }
.pair-art img { position: absolute; inset: var(--art-pad, 1.5rem); width: calc(100% - 2 * var(--art-pad, 1.5rem)); height: calc(100% - 2 * var(--art-pad, 1.5rem)); object-fit: contain; }
.pair-body b { display: block; font-size: 1.05rem; }
.pair-body small { display: block; margin-top: .2rem; color: var(--muted); font-size: .8125rem; }

.product-cta { display: grid; grid-template-columns: minmax(0, 1.4fr) auto; gap: 2rem; align-items: center; padding: clamp(1.5rem, 4vw, 3rem); border: 1px solid var(--line); background: var(--ink-2); }
.product-cta h2 { margin: .35rem 0 .5rem; font-size: clamp(1.75rem, 3vw, 2.5rem); }
.product-cta p { max-width: 560px; margin: 0; }

/* --- catalogue --------------------------------------------------------------- */
.catalogue-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2rem; align-items: end; }
.catalogue-head > div > p { max-width: 640px; }
.catalogue-tools { display: flex; flex-wrap: wrap; gap: .4rem; }
.catalogue-tools button {
  padding: .6rem .9rem;
  border: 1px solid var(--line); background: transparent;
  color: var(--muted); font: inherit; font-size: .8rem; font-weight: 700; letter-spacing: .04em;
  cursor: pointer; transition: color .2s, border-color .2s, background-color .2s;
}
.catalogue-tools button:hover { color: var(--text); border-color: var(--muted); }
.catalogue-tools button[aria-pressed="true"] { color: var(--ink); background: var(--cyan); border-color: var(--cyan); }
.catalogue-tools .print-btn { margin-left: .75rem; }

.cat-list { padding-top: 0 !important; }
.cat-row {
  display: grid; grid-template-columns: 200px minmax(0, 1fr) minmax(0, 1.4fr) 250px;
  gap: 1.5rem; align-items: start;
  padding: 1.5rem 0; border-top: 1px solid var(--line);
}
.cat-row:last-of-type { border-bottom: 1px solid var(--line); }
.cat-row { transition: background-color .2s; }
.cat-row:hover { background: #0c1921; box-shadow: 0 0 0 var(--gutter) #0c1921; clip-path: inset(0 calc(-1 * var(--gutter))); }
.cat-row:hover .cat-art { border-color: var(--cyan); }
.cat-row[hidden] { display: none; }
.cat-art { --art-pad: .75rem; display: block; aspect-ratio: 3 / 2; border: 1px solid var(--line); background: radial-gradient(ellipse at center, #142b34, #071016 72%); }
.cat-art { position: relative; overflow: hidden; }
.cat-art img { position: absolute; inset: var(--art-pad, 1.5rem); width: calc(100% - 2 * var(--art-pad, 1.5rem)); height: calc(100% - 2 * var(--art-pad, 1.5rem)); object-fit: contain; }
.cat-ident h3 { margin: .8rem 0 0; font-size: 1.35rem; letter-spacing: -.02em; }
.cat-ident h3 a { color: inherit; text-decoration: none; }
.cat-ident h3 a:hover { color: var(--cyan); }
.ps { display: grid; gap: .9rem; margin: 0; }
.ps dt { color: var(--cyan); font-size: .72rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.ps div:last-child dt { color: var(--green); }
.ps dd { margin: .3rem 0 0; color: var(--text-2); font-size: .9375rem; }
.specs-mini { display: grid; gap: .45rem; margin: 0; padding: 0; list-style: none; font-size: .8125rem; }
.specs-mini li { display: flex; justify-content: space-between; gap: .75rem; padding-bottom: .45rem; border-bottom: 1px solid var(--line); }
.specs-mini span { color: var(--muted); }
.specs-mini b { color: var(--text); font-variant-numeric: tabular-nums; text-align: right; }
.cat-extra .more { margin-top: 1rem; }

/* --- evidence: reported vs modelled ------------------------------------------ */
.evidence-grid article.is-reported strong { color: var(--green); }

/* --- responsive ------------------------------------------------------------- */
@media (max-width: 1100px) {
  .cat-row { grid-template-columns: 160px minmax(0, 1fr) minmax(0, 1.3fr); }
  .cat-extra { grid-column: 2 / -1; }
  .specs-mini { grid-template-columns: repeat(2, 1fr); column-gap: 1.5rem; }
}
@media (max-width: 980px) {
  .pgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-hero { grid-template-columns: 1fr; }
  .metric-grid.highlights { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .spec-groups { columns: 1; }
  .product-cta { grid-template-columns: 1fr; }
  .catalogue-head { grid-template-columns: 1fr; align-items: start; }
  .site-footer { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .cat-row { grid-template-columns: 1fr; }
  .cat-art { max-width: 320px; }
  .cat-extra { grid-column: auto; }
  .specs-mini { grid-template-columns: 1fr; }
  .subnav { flex-wrap: nowrap; gap: 1.25rem; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .subnav::-webkit-scrollbar { display: none; }
  .subnav a { white-space: nowrap; }
}
@media (max-width: 640px) {
  .pgrid { grid-template-columns: 1fr; }
  .problem-solution { grid-template-columns: 1fr; }
  .pair { grid-template-columns: 96px 1fr; }
  .products-foot { flex-direction: column; align-items: flex-start; }
  .catalogue-tools .print-btn { margin-left: 0; }
}

/* --- print (catalogue as a light sales sheet) ---------------------------------- */
@media print {
  .site-header, .subnav, .catalogue-tools, .skip-link, .footer-nav, .nav-toggle { display: none !important; }
  .page, .page-head, .cat-list, body { background: #fff !important; color: #000 !important; }
  .page-head { padding-top: 0 !important; }
  .cat-row { break-inside: avoid; grid-template-columns: 140px 1fr 1.4fr 180px; border-color: #ccc; }
  .cat-art, .pcard-art, .pair-art, .product-art.hero-art { background: #f3f5f6 !important; border-color: #ddd; }
  .chip, .keyfigs li, .specs-mini li { border-color: #ccc; color: #333; }
  .ps dt, .section-kicker, .more, .crumbs a { color: #0a6f7c !important; }
  .ps div:last-child dt { color: #1f7a4f !important; }
  .ps dd, .short, .kind, p, .specs-mini span { color: #222 !important; }
  .specs-mini b, h1, h2, h3 { color: #000 !important; }
  .spec-group, .problem-solution article, .aside, .product-cta, .pair { background: #fff !important; border-color: #ccc; }
  .spec-table th { color: #444; } .spec-table td { color: #000; }
  .site-footer { border-color: #ccc; color: #444; }
  a[href^="http"]::after { content: ""; }
}