/* ==========================================================================
   SKYLON CONSTRUCTION — styles.css
   Deep navy + true metallic silver. Luxury serif display (Cormorant Garamond)
   paired with Inter. Signature motif: tapered "blade" silver hairlines drawn
   from the logo, and gradient-silver headings on dark sections.

   Sections
     1.  Design tokens
     2.  Reset & base
     3.  Typography
     4.  Signature elements (blade lines, silver text, eyebrows)
     5.  Layout (container, section, grids)
     6.  Buttons
     7.  Header & navigation
     8.  Hero (full) & page hero (slim)
     9.  Intro / statement blocks
     10. Cards — services
     11. Cards — projects & filters
     12. Stats band (dark)
     13. Split feature (image + text)
     14. Skylon Group band (dark)
     15. Process timeline
     16. Gallery (masonry) & lightbox
     17. Case study (project-single)
     18. Journal (blog) & article
     19. Contact split & forms
     20. FAQ (details/summary)
     21. CTA band (dark)
     22. Footer
     23. Utilities, reveal, reduced motion
     24. Responsive
   ========================================================================== */


/* 1. DESIGN TOKENS -------------------------------------------------------- */
:root {
  /* Navy scale — the night the silver shines against */
  --navy-950: #050E1B;
  --navy-900: #071627;
  --navy-850: #0A1C30;
  --navy-800: #0D2238;
  --navy-700: #143049;

  /* Silver scale — cool metal, never flat grey */
  --silver-050: #F6F8FA;
  --silver-100: #EDF0F3;
  --silver-200: #DCE2E8;
  --silver-300: #C3CCD4;
  --silver-400: #A5B0BB;
  --silver-500: #87939F;
  --silver-600: #6B7885;

  /* Light surfaces — cool, architectural white */
  --paper: #F4F6F8;
  --white: #FFFFFF;

  /* Text */
  --ink: #131E29;
  --ink-soft: #4A5561;
  --mist: #C5CFD8;        /* body copy on dark */
  --mist-soft: #8D9AA7;   /* secondary on dark */

  /* Hairlines */
  --line-light: #E2E6EA;
  --line-dark: rgba(197, 206, 215, 0.16);

  /* Metallic gradients — the "true silver" */
  --grad-silver-text: linear-gradient(178deg,
      #F7F9FB 0%, #DFE5EA 28%, #ADB8C3 50%,
      #ECF0F3 64%, #97A3AF 88%, #B9C2CB 100%);
  --grad-silver-line: linear-gradient(90deg,
      transparent 0%, rgba(214,221,228,0.85) 18%,
      #A3AFBA 50%, rgba(214,221,228,0.85) 82%, transparent 100%);
  --grad-silver-line-solid: linear-gradient(90deg,
      #E9EDF1 0%, #9FABB7 50%, #E9EDF1 100%);
  --grad-silver-btn: linear-gradient(180deg,
      #F1F4F6 0%, #D3DAE1 42%, #A9B4BF 56%, #C8CFD6 100%);
  --grad-dark-veil: linear-gradient(180deg,
      rgba(5,14,27,0.42) 0%, rgba(5,14,27,0.55) 45%, rgba(5,14,27,0.92) 100%);

  /* Type */
  --font-display: "Cormorant Garamond", "Times New Roman", Georgia, serif;
  --font-sans: "Inter", "Helvetica Neue", Arial, sans-serif;

  /* Layout */
  --container: 1220px;
  --container-narrow: 860px;
  --gutter: clamp(1.25rem, 4vw, 2.75rem);
  --section-y: clamp(4.5rem, 9vw, 8.5rem);
  --header-h: 116px;

  --radius: 2px;
  --radius-lg: 4px;

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --t-fast: 220ms var(--ease);
  --t: 380ms var(--ease);
  --t-slow: 700ms var(--ease);

  /* Elevation */
  --shadow-card: 0 24px 50px -32px rgba(5, 14, 27, 0.35);
  --shadow-deep: 0 40px 80px -40px rgba(5, 14, 27, 0.55);
}


/* 2. RESET & BASE --------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;             /* 17px */
  line-height: 1.72;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
figure { margin: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
address { font-style: normal; }
[hidden] { display: none !important; }

::selection { background: var(--navy-800); color: var(--silver-100); }

:focus-visible {
  outline: 2px solid var(--silver-400);
  outline-offset: 3px;
}

.skip-link {
  position: absolute; left: 1rem; top: -100%;
  z-index: 200;
  padding: 0.7rem 1.1rem;
  background: var(--navy-950); color: var(--silver-100);
  font-size: 0.85rem; letter-spacing: 0.06em;
  transition: top var(--t-fast);
}
.skip-link:focus { top: 1rem; }


/* 3. TYPOGRAPHY ----------------------------------------------------------- */
h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: 0.005em;
  margin: 0 0 0.6em;
  color: var(--ink);
  text-wrap: balance;
}

h1 { font-size: clamp(2.7rem, 6.2vw, 4.9rem); }
h2 { font-size: clamp(2.1rem, 4.2vw, 3.35rem); }
h3 { font-size: clamp(1.35rem, 2.2vw, 1.7rem); line-height: 1.22; }

h1 em, h2 em, .display em {
  font-style: italic;
  font-weight: 500;
}

p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }

.lead {
  font-size: clamp(1.125rem, 1.6vw, 1.3rem);
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 58ch;
}

.on-dark h1, .on-dark h2, .on-dark h3 { color: var(--silver-100); }
.on-dark p, .on-dark .lead { color: var(--mist); }
.on-dark .lead { color: var(--mist); }

.small { font-size: 0.9rem; color: var(--ink-soft); }
.on-dark .small { color: var(--mist-soft); }


/* 4. SIGNATURE ELEMENTS --------------------------------------------------- */

/* Tapered silver hairline — drawn from the logo's rules */
.blade {
  height: 1px;
  width: min(160px, 40%);
  background: var(--grad-silver-line);
  border: 0;
  margin: 1.6rem 0 1.9rem;
}
.blade--center { margin-inline: auto; }
.blade--wide { width: min(340px, 70%); }
.blade--full { width: 100%; }

/* True-silver gradient text (dark sections) */
.silver-text {
  color: var(--silver-200); /* fallback */
}
@supports (-webkit-background-clip: text) or (background-clip: text) {
  .silver-text {
    background: var(--grad-silver-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

/* Eyebrow label */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--silver-600);
  margin: 0 0 1.15rem;
}
.eyebrow::before {
  content: "";
  width: 34px; height: 1px;
  background: var(--grad-silver-line-solid);
}
.on-dark .eyebrow { color: var(--silver-400); }

/* Section heading group */
.section-head { max-width: 720px; margin-bottom: clamp(2.4rem, 5vw, 3.8rem); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head--center .eyebrow { justify-content: center; }
.section-head--center .blade { margin-inline: auto; }
.section-head .lead { margin-top: 0.4rem; }


/* 5. LAYOUT --------------------------------------------------------------- */
.container {
  width: min(var(--container), 100% - 2 * var(--gutter));
  margin-inline: auto;
}
.container--narrow { width: min(var(--container-narrow), 100% - 2 * var(--gutter)); }

.section { padding-block: var(--section-y); }
.section--paper { background: var(--paper); }
.section--dark {
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(20, 48, 73, 0.45), transparent 60%),
    var(--navy-950);
  color: var(--mist);
}
.section--tight { padding-block: clamp(3.25rem, 6vw, 5.5rem); }

.grid { display: grid; gap: clamp(1.4rem, 2.6vw, 2.2rem); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }


/* 6. BUTTONS -------------------------------------------------------------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1.02rem 2.1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border-radius: var(--radius);
  border: 1px solid transparent;
  overflow: hidden;
  transition: transform var(--t-fast), box-shadow var(--t-fast),
              background-color var(--t-fast), color var(--t-fast),
              border-color var(--t-fast);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

/* Primary — a plate of polished silver with a passing shine */
.btn--silver {
  background: var(--grad-silver-btn);
  color: var(--navy-950);
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.65),
    inset 0 -1px 0 rgba(5, 14, 27, 0.18),
    0 14px 28px -16px rgba(5, 14, 27, 0.55);
}
.btn--silver::after {
  content: "";
  position: absolute;
  top: -20%; bottom: -20%; left: 0;
  width: 42%;
  background: linear-gradient(105deg,
      transparent 0%, rgba(255, 255, 255, 0.75) 50%, transparent 100%);
  transform: translateX(-160%) skewX(-18deg);
  transition: transform 650ms var(--ease);
  pointer-events: none;
}
.btn--silver:hover::after,
.btn--silver:focus-visible::after { transform: translateX(340%) skewX(-18deg); }
.btn--silver:hover {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.75),
    inset 0 -1px 0 rgba(5, 14, 27, 0.18),
    0 20px 36px -18px rgba(5, 14, 27, 0.6);
}

/* Ghost on dark */
.btn--ghost {
  color: var(--silver-100);
  border-color: rgba(197, 206, 215, 0.42);
  background: rgba(255, 255, 255, 0.02);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--silver-200);
  background: rgba(220, 226, 232, 0.08);
}

/* Solid navy on light */
.btn--navy {
  background: var(--navy-950);
  color: var(--silver-100);
  border-color: var(--navy-950);
}
.btn--navy:hover,
.btn--navy:focus-visible { background: var(--navy-800); border-color: var(--navy-800); }

/* Quiet text link with drifting arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--navy-800);
}
.link-arrow svg { width: 17px; height: 17px; transition: transform var(--t-fast); }
.link-arrow:hover svg,
.link-arrow:focus-visible svg { transform: translateX(5px); }
.on-dark .link-arrow { color: var(--silver-200); }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; }


/* 7. HEADER & NAVIGATION --------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 120;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(5, 14, 27, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-dark);
  transition: height var(--t), background-color var(--t),
              border-color var(--t), backdrop-filter var(--t);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand { display: inline-flex; align-items: center; flex-shrink: 0; }
.brand img {
  width: auto;
  height: 46px;
}

.nav__rows {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.3rem;
}
.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 1.2vw, 1.5rem);
}
.nav__link {
  position: relative;
  display: inline-block;
  padding: 0.4rem 0;
  font-size: 0.73rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--mist);
  transition: color var(--t-fast);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--grad-silver-line-solid);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-fast);
}
.nav__link:hover,
.nav__link:focus-visible,
.nav__link[aria-current="page"] { color: var(--silver-050); }
.nav__link:hover::after,
.nav__link:focus-visible::after,
.nav__link[aria-current="page"]::after { transform: scaleX(1); }

.header__actions { display: flex; align-items: center; gap: 1.4rem; }
.header__phone {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--silver-200);
  transition: color var(--t-fast);
}
.header__phone svg { width: 18px; height: 18px; }
.header__phone:hover { color: var(--white); }
.header__actions .btn { padding: 0.78rem 1.3rem; font-size: 0.74rem; letter-spacing: 0.15em; }

/* Mobile toggle */
.nav-toggle {
  display: none;
  width: 46px; height: 46px;
  align-items: center;
  justify-content: center;
}
.nav-toggle__bars { position: relative; width: 24px; height: 14px; display: block; }
.nav-toggle__bars span {
  position: absolute;
  left: 0; width: 100%; height: 1.5px;
  background: var(--silver-100);
  transition: transform var(--t-fast), opacity var(--t-fast), top var(--t-fast);
}
.nav-toggle__bars span:nth-child(1) { top: 0; }
.nav-toggle__bars span:nth-child(2) { top: 6.25px; }
.nav-toggle__bars span:nth-child(3) { top: 12.5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { top: 6.25px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { top: 6.25px; transform: rotate(-45deg); }

.nav__mobile-meta { display: none; }


/* 8. HERO ------------------------------------------------------------------ */
.hero {
  position: relative;
  min-height: max(100svh, 640px);
  display: flex;
  align-items: flex-end;
  color: var(--mist);
  isolation: isolate;
  overflow: hidden;
}
.hero__media,
.hero__media img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: -2;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--grad-dark-veil);
}
.hero__inner {
  width: min(var(--container), 100% - 2 * var(--gutter));
  margin-inline: auto;
  padding-block: clamp(6rem, 12vh, 9rem) clamp(4rem, 9vh, 6.5rem);
}
.hero .eyebrow { color: var(--silver-300); }
.hero h1 {
  color: var(--silver-050);
  max-width: 15ch;
  margin-bottom: 0.35em;
}
.hero__lead {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  color: var(--mist);
  max-width: 52ch;
  margin-bottom: 2.1rem;
}
.hero .blade { width: min(220px, 55%); margin: 0 0 1.9rem; }

.hero__scroll {
  position: absolute;
  right: clamp(1.25rem, 4vw, 2.75rem);
  bottom: 2.2rem;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--mist-soft);
  writing-mode: vertical-rl;
}
.hero__scroll::after {
  content: "";
  width: 1px; height: 56px;
  background: linear-gradient(180deg, var(--silver-400), transparent);
  animation: scroll-drip 2.4s var(--ease) infinite;
}
@keyframes scroll-drip {
  0%   { transform: scaleY(0); transform-origin: top; }
  45%  { transform: scaleY(1); transform-origin: top; }
  55%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Hero entrance — one orchestrated moment */
.hero__inner > * { opacity: 0; transform: translateY(26px); }
.js .hero__inner > * {
  animation: hero-rise 900ms var(--ease) forwards;
}
.js .hero__inner > *:nth-child(1) { animation-delay: 120ms; }
.js .hero__inner > *:nth-child(2) { animation-delay: 240ms; }
.js .hero__inner > *:nth-child(3) { animation-delay: 340ms; }
.js .hero__inner > *:nth-child(4) { animation-delay: 440ms; }
.js .hero__inner > *:nth-child(5) { animation-delay: 560ms; }
@keyframes hero-rise {
  to { opacity: 1; transform: none; }
}
html:not(.js) .hero__inner > * { opacity: 1; transform: none; }

/* Brand hero — compact (~72vh) video band + silver logo with shine sweep */
.hero--brand {
  align-items: center;
  text-align: center;
  margin-top: var(--header-h);
  min-height: max(72svh, 540px);
}
.hero--brand .hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-block: clamp(3rem, 6vh, 4.5rem) clamp(2.8rem, 5.5vh, 4rem);
}
.hero__media video {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-brand {
  position: relative;
  width: min(480px, 78vw);
  margin-bottom: 0.4rem;
}
.hero-brand img { width: 100%; height: auto; }
.hero-brand__shine {
  display: none;
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-brand__shine::before {
  content: "";
  position: absolute;
  top: -10%; bottom: -10%;
  left: 0;
  width: 34%;
  background: linear-gradient(105deg,
      transparent 0%, rgba(255, 255, 255, 0.5) 50%, transparent 100%);
  transform: translateX(-130%);
}
@supports ((-webkit-mask-image: url("")) or (mask-image: url(""))) {
  .hero-brand__shine {
    display: block;
    -webkit-mask-image: url("../images/logo-skylon-transparent.png");
    -webkit-mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-image: url("../images/logo-skylon-transparent.png");
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
  }
  .hero-brand__shine::before {
    animation: brand-shine 14s var(--ease) infinite;
  }
}
/* Sweep crosses the logo in ~2.5s, then rests for ~10.5s */
@keyframes brand-shine {
  0%        { transform: translateX(-130%); }
  25%, 100% { transform: translateX(430%); }
}

.hero--brand .hero__lead { margin-inline: auto; margin-bottom: 1.7rem; font-size: clamp(1rem, 1.3vw, 1.125rem); }
.hero--brand .blade { margin: 0 auto 1.5rem; }
.hero--brand .btn-row { justify-content: center; }

/* Slim hero for inner pages */
.page-hero {
  position: relative;
  background:
    radial-gradient(900px 420px at 12% 120%, rgba(20, 48, 73, 0.5), transparent 60%),
    var(--navy-950);
  color: var(--mist);
  padding-block: calc(var(--header-h) + clamp(3.5rem, 8vw, 6.5rem)) clamp(3rem, 6vw, 5rem);
  isolation: isolate;
  overflow: hidden;
}
.page-hero--image::before {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background: var(--grad-dark-veil);
}
.page-hero__media,
.page-hero__media img {
  position: absolute; inset: 0; z-index: -2;
  width: 100%; height: 100%; object-fit: cover;
}
.page-hero h1 { color: var(--silver-050); margin-bottom: 0.3em; }
.page-hero .lead { color: var(--mist); }
.page-hero .blade { margin: 1.5rem 0 0; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-soft);
  margin-bottom: 1.4rem;
}
.breadcrumb a { color: var(--silver-400); transition: color var(--t-fast); }
.breadcrumb a:hover { color: var(--silver-100); }
.breadcrumb li + li::before { content: "—"; margin-right: 0.6rem; color: var(--silver-600); }


/* 9. INTRO / STATEMENT ----------------------------------------------------- */
.statement {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.1vw, 2.4rem);
  line-height: 1.32;
  color: var(--ink);
  max-width: 30ch;
}
.statement em { font-style: italic; }
.on-dark .statement { color: var(--silver-100); }

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}


/* 10. SERVICE CARDS -------------------------------------------------------- */
.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.05rem;
  padding: clamp(1.8rem, 3vw, 2.4rem);
  background: var(--white);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-lg);
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.service-card::before {
  content: "";
  position: absolute;
  top: -1px; left: 8%; right: 8%;
  height: 1px;
  background: var(--grad-silver-line);
  opacity: 0;
  transition: opacity var(--t), left var(--t), right var(--t);
}
.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
  border-color: var(--silver-300);
}
.service-card:hover::before { opacity: 1; left: 0; right: 0; }

.service-card__icon {
  width: 46px; height: 46px;
  color: var(--silver-600);
}
.service-card__icon svg { width: 100%; height: 100%; }
.service-card h3 { margin-bottom: 0; }
.service-card p { color: var(--ink-soft); font-size: 0.98rem; margin-bottom: 0.2rem; }
.service-card .link-arrow { margin-top: auto; }


/* 11. PROJECT CARDS & FILTERS ---------------------------------------------- */
.project-card {
  position: relative;
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--navy-900);
  isolation: isolate;
}
.project-card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.project-card__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 900ms var(--ease), filter 900ms var(--ease);
}
.project-card:hover .project-card__media img,
.project-card:focus-visible .project-card__media img {
  transform: scale(1.05);
  filter: brightness(1.05);
}
.project-card::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 42%, rgba(5, 14, 27, 0.9) 100%);
  z-index: 1;
  transition: opacity var(--t);
}
.project-card__body {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  padding: 1.6rem 1.7rem 1.7rem;
}
.project-card__cat {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--silver-400);
  margin-bottom: 0.45rem;
}
.project-card__title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2vw, 1.65rem);
  color: var(--silver-050);
  margin: 0;
  line-height: 1.2;
}
.project-card__line {
  width: 0;
  height: 1px;
  background: var(--grad-silver-line-solid);
  margin-top: 0.9rem;
  transition: width 600ms var(--ease);
}
.project-card:hover .project-card__line,
.project-card:focus-visible .project-card__line { width: 74px; }

.project-card--tall .project-card__media { aspect-ratio: 3 / 4; }

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.filter-btn {
  padding: 0.62rem 1.35rem;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: 1px solid var(--line-light);
  border-radius: 999px;
  background: var(--white);
  transition: color var(--t-fast), border-color var(--t-fast),
              background var(--t-fast), box-shadow var(--t-fast);
}
.filter-btn:hover { border-color: var(--silver-400); color: var(--ink); }
.filter-btn[aria-pressed="true"] {
  background: var(--navy-950);
  border-color: var(--navy-950);
  color: var(--silver-100);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}


/* 12. STATS BAND (dark) ---------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  text-align: center;
}
.stat__value {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 4.6rem);
  line-height: 1;
  display: block;
  margin-bottom: 0.55rem;
}
.stat__label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist-soft);
}
.stat + .stat { border-left: 1px solid var(--line-dark); }


/* 13. SPLIT FEATURE -------------------------------------------------------- */
.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2.2rem, 5vw, 4.5rem);
  align-items: center;
}
.split--reverse .split__media { order: 2; }
.split__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-deep);
}
.split__media img { width: 100%; height: 100%; object-fit: cover; }
.split__media::after {
  content: "";
  position: absolute;
  left: 6%; right: 6%; bottom: 0;
  height: 1px;
  background: var(--grad-silver-line);
}
.split__body .lead { margin-bottom: 1.6rem; }

/* Checklist with serif mini-headings (description on new line) */
.checklist--heads li strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin-bottom: 0.2rem;
}

/* Caption under project photography — "shot on site" note */
.photo-note {
  display: block;
  margin-top: 0.85rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver-600);
}
.on-dark .photo-note { color: var(--mist-soft); }

.checklist { display: grid; gap: 0.85rem; margin: 1.4rem 0 1.9rem; }
.checklist li {
  position: relative;
  padding-left: 2rem;
  color: var(--ink-soft);
}
.checklist li strong { color: var(--ink); font-weight: 600; }
.checklist li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 18px; height: 1px;
  background: var(--grad-silver-line-solid);
}
.on-dark .checklist li { color: var(--mist); }
.on-dark .checklist li strong { color: var(--silver-100); }


/* 14. SKYLON GROUP BAND ---------------------------------------------------- */
.group-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.2rem;
}
.group-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.7rem 1.4rem;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: rgba(13, 34, 56, 0.35);
  transition: border-color var(--t), background var(--t), transform var(--t);
}
.group-card:hover {
  border-color: rgba(196, 204, 212, 0.5);
  background: rgba(13, 34, 56, 0.6);
  transform: translateY(-4px);
}
.group-card__name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--silver-100);
  line-height: 1.2;
}
.group-card p {
  font-size: 0.92rem;
  color: var(--mist-soft);
  margin: 0;
  flex-grow: 1;
}
.group-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver-300);
  transition: color var(--t-fast);
}
.group-card__link svg { width: 14px; height: 14px; transition: transform var(--t-fast); }
.group-card:hover .group-card__link { color: var(--silver-050); }
.group-card:hover .group-card__link svg { transform: translate(3px, -3px); }


/* Group cards on light background — navy tiles */
.section--paper .group-card {
  background:
    radial-gradient(280px 180px at 100% 0%, rgba(20, 48, 73, 0.55), transparent 70%),
    var(--navy-950);
  border-color: rgba(5, 14, 27, 0.9);
  box-shadow: 0 18px 34px -24px rgba(5, 14, 27, 0.45);
}
.section--paper .group-card:hover {
  border-color: var(--silver-400);
  box-shadow: 0 26px 44px -24px rgba(5, 14, 27, 0.55);
}
.section--paper .group-card__name { color: var(--silver-100); }
.section--paper .group-card p { color: var(--mist-soft); }
.section--paper .group-card__link { color: var(--silver-300); }
.section--paper .group-card:hover .group-card__link { color: var(--silver-050); }


/* 15. PROCESS TIMELINE ----------------------------------------------------- */
.timeline {
  position: relative;
  display: grid;
  gap: clamp(2.6rem, 5vw, 3.6rem);
  max-width: 780px;
  padding-left: clamp(3.4rem, 6vw, 4.6rem);
}
.timeline::before {
  content: "";
  position: absolute;
  left: 11px; top: 10px; bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg,
      transparent, var(--silver-300) 12%, var(--silver-300) 88%, transparent);
}
.timeline__step { position: relative; }
.timeline__step::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(3.4rem, 6vw, 4.6rem) + 6px);
  top: 0.5em;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--grad-silver-btn);
  box-shadow: 0 0 0 5px var(--white), 0 0 0 6px var(--silver-300);
}
.section--paper .timeline__step::before { box-shadow: 0 0 0 5px var(--paper), 0 0 0 6px var(--silver-300); }
.timeline__num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--silver-600);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.35rem;
}
.timeline__step h3 { margin-bottom: 0.45rem; }
.timeline__step p { color: var(--ink-soft); max-width: 58ch; }


/* 16. GALLERY & LIGHTBOX --------------------------------------------------- */
.masonry {
  columns: 3;
  column-gap: 1.3rem;
}
.masonry__item {
  position: relative;
  break-inside: avoid;
  margin-bottom: 1.3rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: zoom-in;
  isolation: isolate;
  background: var(--navy-900);
  border: 0;
  display: block;
  width: 100%;
  padding: 0;
  text-align: left;
}
.masonry__item img {
  width: 100%;
  transition: transform 900ms var(--ease);
}
.masonry__item:hover img,
.masonry__item:focus-visible img { transform: scale(1.045); }
.masonry__item::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(5, 14, 27, 0.82) 100%);
  opacity: 0;
  transition: opacity var(--t);
}
.masonry__item:hover::after,
.masonry__item:focus-visible::after { opacity: 1; }
.masonry__caption {
  position: absolute;
  left: 1.2rem; right: 1.2rem; bottom: 1.05rem;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--t), transform var(--t);
  pointer-events: none;
}
.masonry__item:hover .masonry__caption,
.masonry__item:focus-visible .masonry__caption { opacity: 1; transform: none; }
.masonry__caption span {
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--silver-400);
}
.masonry__caption strong {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.12rem;
  color: var(--silver-050);
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 4vw, 3rem);
  background: rgba(5, 14, 27, 0.96);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.lightbox__figure {
  max-width: min(1180px, 100%);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.lightbox__figure img {
  max-height: 78vh;
  width: auto;
  max-width: 100%;
  margin-inline: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-deep);
}
.lightbox__caption {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 1rem;
  color: var(--mist);
  font-size: 0.95rem;
  text-align: center;
}
.lightbox__counter {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--mist-soft);
}
.lightbox__btn {
  position: absolute;
  width: 52px; height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(197, 206, 215, 0.35);
  border-radius: 50%;
  color: var(--silver-100);
  background: rgba(13, 34, 56, 0.4);
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
}
.lightbox__btn:hover { border-color: var(--silver-200); background: rgba(13, 34, 56, 0.8); }
.lightbox__btn svg { width: 20px; height: 20px; }
.lightbox__close { top: clamp(1rem, 3vw, 1.8rem); right: clamp(1rem, 3vw, 1.8rem); }
.lightbox__prev { left: clamp(0.6rem, 2.5vw, 1.8rem); top: 50%; transform: translateY(-50%); }
.lightbox__next { right: clamp(0.6rem, 2.5vw, 1.8rem); top: 50%; transform: translateY(-50%); }
.lightbox__prev:hover { transform: translateY(-50%) translateX(-3px); }
.lightbox__next:hover { transform: translateY(-50%) translateX(3px); }

body.lightbox-open { overflow: hidden; }


/* 17. CASE STUDY (project-single) ------------------------------------------ */
.case-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem 2rem;
  padding: clamp(1.6rem, 3vw, 2.2rem) 0;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.case-meta--6 { grid-template-columns: repeat(3, 1fr); }
.case-meta dt {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist-soft);
  margin-bottom: 0.35rem;
}
.case-meta dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--silver-100);
}

.case-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.case-gallery img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.case-gallery figure:nth-child(2) { transform: translateY(1.8rem); }

.next-project {
  display: block;
  text-align: center;
  padding-block: clamp(3rem, 6vw, 4.5rem);
}
.next-project__label {
  display: block;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--silver-600);
  margin-bottom: 0.8rem;
}
.next-project__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  color: var(--ink);
  transition: color var(--t-fast);
}
.next-project:hover .next-project__title { color: var(--navy-700); }


/* 18. JOURNAL (blog) ------------------------------------------------------- */
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.post-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card);
  border-color: var(--silver-300);
}
.post-card__media { aspect-ratio: 16 / 10; overflow: hidden; }
.post-card__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 900ms var(--ease);
}
.post-card:hover .post-card__media img { transform: scale(1.05); }
.post-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.7rem 1.7rem 1.9rem;
  flex-grow: 1;
}
.post-card__meta {
  display: flex;
  gap: 0.9rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver-600);
}
.post-card h3 { margin: 0; }
.post-card p { color: var(--ink-soft); font-size: 0.97rem; flex-grow: 1; }

/* Video cards (Videos page) */
.video-feature {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 8;
  background: var(--navy-900);
  isolation: isolate;
  box-shadow: var(--shadow-deep);
}
.video-feature img {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0.55;
}
.video-feature::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(5,14,27,0.15), rgba(5,14,27,0.75));
}
.video-feature__body {
  position: absolute; inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  text-align: center;
  padding: 2rem;
}
.play-badge {
  width: 86px; height: 86px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--grad-silver-btn);
  color: var(--navy-950);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65), 0 18px 40px -18px rgba(5,14,27,0.8);
}
.play-badge svg { width: 30px; height: 30px; margin-left: 4px; }
.video-feature__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  color: var(--silver-050);
}
.video-feature__note {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--silver-400);
}

.video-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.video-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--navy-900);
}
.video-card__media img { width: 100%; height: 100%; object-fit: cover; opacity: 0.6; }
.video-card__media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5,14,27,0.55));
}
.video-card__media .play-badge {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 58px; height: 58px;
  z-index: 1;
  opacity: 0.92;
}
.video-card__media .play-badge svg { width: 20px; height: 20px; margin-left: 3px; }
.video-card__soon {
  position: absolute;
  top: 0.9rem; left: 0.9rem;
  z-index: 1;
  padding: 0.32rem 0.75rem;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--silver-100);
  border: 1px solid rgba(197,206,215,0.4);
  border-radius: 999px;
  background: rgba(5,14,27,0.55);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}
.video-card__body { padding: 1.3rem 1.4rem 1.5rem; display: grid; gap: 0.4rem; }
.video-card__cat {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver-600);
}
.video-card h3 { font-size: 1.25rem; margin: 0; }

/* Article body */
.article {
  max-width: 720px;
  margin-inline: auto;
}
.article p { color: var(--ink-soft); }
.article h2 { font-size: clamp(1.6rem, 3vw, 2.15rem); margin-top: 2.4em; }
.article h2:first-child { margin-top: 0; }
.article blockquote {
  margin: 2.4rem 0;
  padding: 0 0 0 1.8rem;
  border-left: 1px solid transparent;
  border-image: linear-gradient(180deg, transparent, var(--silver-400), transparent) 1;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-style: italic;
  line-height: 1.4;
  color: var(--ink);
}
.article figure { margin: 2.4rem 0; }
.article figure img { border-radius: var(--radius-lg); width: 100%; }
.article figcaption {
  margin-top: 0.7rem;
  font-size: 0.85rem;
  color: var(--silver-600);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist-soft);
}


/* 19. CONTACT & FORMS ------------------------------------------------------ */
.contact-split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-deep);
}
.contact-panel {
  background:
    radial-gradient(600px 400px at 0% 110%, rgba(20, 48, 73, 0.55), transparent 65%),
    var(--navy-950);
  color: var(--mist);
  padding: clamp(2.2rem, 4.5vw, 3.6rem);
  display: flex;
  flex-direction: column;
  gap: 1.9rem;
}
.contact-panel h2 { color: var(--silver-050); font-size: clamp(1.7rem, 3vw, 2.3rem); }
.contact-rows { display: grid; gap: 1.4rem; }
.contact-row {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 1rem;
  align-items: start;
}
.contact-row svg { width: 20px; height: 20px; color: var(--silver-400); margin-top: 0.2rem; }
.contact-row a { color: var(--silver-100); transition: color var(--t-fast); }
.contact-row a:hover { color: var(--white); }
.contact-row__label {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist-soft);
  margin-bottom: 0.25rem;
}
.contact-panel .blade { margin: 0.2rem 0; }

.contact-form {
  background: var(--white);
  padding: clamp(2.2rem, 4.5vw, 3.6rem);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
.form-field { display: flex; flex-direction: column; gap: 0.5rem; }
.form-field--full { grid-column: 1 / -1; }
.form-field label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.form-field input,
.form-field select,
.form-field textarea {
  font: inherit;
  color: var(--ink);
  padding: 0.85rem 1rem;
  background: var(--paper);
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
}
.form-field textarea { min-height: 148px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  background: var(--white);
  border-color: var(--silver-500);
  box-shadow: 0 0 0 3px rgba(165, 176, 187, 0.28);
}
.form-consent {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.form-consent input { margin-top: 0.28rem; accent-color: var(--navy-800); }
.form-note { font-size: 0.85rem; color: var(--silver-600); margin-top: 1.1rem; }


/* Accreditation badge placeholders */
.badge-row { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.8rem; }
.badge-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 156px;
  height: 76px;
  padding: 0 1.3rem;
  border: 1px dashed var(--silver-400);
  border-radius: var(--radius-lg);
  background: var(--white);
  color: var(--silver-600);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-align: center;
}
.on-dark .badge-slot {
  background: rgba(13, 34, 56, 0.35);
  border-color: rgba(197, 206, 215, 0.35);
  color: var(--mist-soft);
}


/* 20. FAQ ------------------------------------------------------------------ */
.faq { border-top: 1px solid var(--line-light); }
.faq details { border-bottom: 1px solid var(--line-light); }
.faq summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.5rem 0.2rem;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--ink);
  transition: color var(--t-fast);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--navy-700); }
.faq summary::after {
  content: "";
  flex-shrink: 0;
  width: 12px; height: 12px;
  border-right: 1.5px solid var(--silver-600);
  border-bottom: 1.5px solid var(--silver-600);
  transform: rotate(45deg);
  transition: transform var(--t-fast);
  margin-right: 0.3rem;
}
.faq details[open] summary::after { transform: rotate(-135deg); }
.faq details p {
  padding: 0 0.2rem 1.6rem;
  color: var(--ink-soft);
  max-width: 62ch;
}


/* 21. CTA BAND ------------------------------------------------------------- */
.cta-band { text-align: center; }
.cta-band .eyebrow { justify-content: center; }
.cta-band h2 {
  font-size: clamp(2.3rem, 5vw, 3.9rem);
  max-width: 18ch;
  margin-inline: auto;
}
.cta-band .lead {
  margin-inline: auto;
  margin-bottom: 2.3rem;
}
.cta-band .btn-row { justify-content: center; }
.cta-band .blade { margin: 1.8rem auto; }


/* 22. FOOTER ---------------------------------------------------------------- */
.site-footer {
  background: var(--navy-950);
  color: var(--mist-soft);
  position: relative;
}
.site-footer::before {
  content: "";
  display: block;
  height: 1px;
  background: var(--grad-silver-line);
  width: min(720px, 86%);
  margin-inline: auto;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  padding-block: clamp(3.2rem, 6vw, 5rem) clamp(2.4rem, 4vw, 3.4rem);
}
.footer__brand img { height: 52px; width: auto; margin-bottom: 1.3rem; }
.footer__brand p { font-size: 0.94rem; max-width: 34ch; }

.footer__title {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--silver-400);
  margin-bottom: 1.2rem;
}
.footer__links { display: grid; gap: 0.65rem; }
.footer__links a {
  font-size: 0.95rem;
  color: var(--mist-soft);
  transition: color var(--t-fast);
}
.footer__links a:hover { color: var(--silver-100); }

.footer__contact { display: grid; gap: 0.8rem; font-size: 0.95rem; }
.footer__contact a { color: var(--silver-200); transition: color var(--t-fast); }
.footer__contact a:hover { color: var(--white); }

.socials { display: flex; gap: 0.8rem; margin-top: 1.4rem; }
.socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid var(--line-dark);
  border-radius: 50%;
  color: var(--silver-400);
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.socials a:hover {
  color: var(--silver-050);
  border-color: var(--silver-500);
  background: rgba(220, 226, 232, 0.06);
}
.socials svg { width: 17px; height: 17px; }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem 2rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.82rem;
}
.footer__bottom a { color: var(--mist-soft); transition: color var(--t-fast); }
.footer__bottom a:hover { color: var(--silver-100); }
.footer__legal { display: flex; flex-wrap: wrap; gap: 0.4rem 1.6rem; }


/* 23. UTILITIES, REVEAL, MOTION -------------------------------------------- */
.pt-tight { padding-top: clamp(2.5rem, 5vw, 4rem) !important; }
.pb-tight { padding-bottom: clamp(2rem, 4vw, 3.25rem) !important; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.text-center { text-align: center; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Scroll reveal (JS-gated; content always visible without JS) */
.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 750ms var(--ease), transform 750ms var(--ease);
  transition-delay: calc(var(--i, 0) * 90ms);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .js .reveal, .js .hero__inner > * { opacity: 1 !important; transform: none !important; }
}


/* 24. RESPONSIVE ------------------------------------------------------------ */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .group-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1200px) {
  :root { --header-h: 76px; }

  .nav-toggle { display: flex; }
  .header__actions { display: none; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background:
      radial-gradient(700px 500px at 100% 0%, rgba(20, 48, 73, 0.5), transparent 60%),
      var(--navy-950);
    padding: clamp(2rem, 6vw, 3.5rem) var(--gutter) 3rem;
    display: flex;
    flex-direction: column;
    gap: 2.4rem;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--t), transform var(--t), visibility 0s linear var(--t);
  }
  .nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: opacity var(--t), transform var(--t);
  }
  .nav__list { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .nav__link {
    font-family: var(--font-display);
    font-size: 2rem;
    letter-spacing: 0.02em;
    text-transform: none;
    font-weight: 500;
    padding: 0.35rem 0;
  }
  .nav__mobile-meta {
    display: grid;
    gap: 1.4rem;
    border-top: 1px solid var(--line-dark);
    padding-top: 2rem;
  }
  .nav__mobile-meta .btn-row { flex-direction: column; align-items: stretch; }
  .nav__mobile-meta .header__phone { font-size: 1.05rem; }
  .nav__mobile-meta .header__phone span { display: inline; }
  body.nav-open { overflow: hidden; }
}

@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .split, .split--reverse { grid-template-columns: 1fr; }
  .split--reverse .split__media { order: 0; }
  .intro-grid { grid-template-columns: 1fr; }
  .contact-split { grid-template-columns: 1fr; }
  .masonry { columns: 2; }
  .case-meta { grid-template-columns: repeat(2, 1fr); }
  .case-gallery { grid-template-columns: repeat(2, 1fr); }
  .case-gallery figure:nth-child(2) { transform: none; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  body { font-size: 1rem; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .group-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .stat + .stat {
    border-left: 0;
    border-top: 1px solid var(--line-dark);
    padding-top: 1.6rem;
  }
  .masonry { columns: 1; }
  .form-grid { grid-template-columns: 1fr; }
  .case-gallery { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .hero__scroll { display: none; }
  .btn-row .btn { width: 100%; }
  .lightbox__prev, .lightbox__next { width: 44px; height: 44px; }
}
/* ============================================================
   LOCATION PAGES  (added for local landing pages)
   ============================================================ */

/* Case-study mini cards */
.mini-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
  margin-top: clamp(2rem, 4vw, 3rem);
}
.mini-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.5rem 1.3rem;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-lg);
  background: var(--white);
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}
.mini-card:hover {
  border-color: var(--silver-400);
  transform: translateY(-3px);
}
.mini-card__value {
  font-family: var(--font-display);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--ink);
}
.mini-card__name {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver-600);
}
.mini-card p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0;
}
.section--dark .mini-card,
.on-dark .mini-card {
  background: rgba(13, 34, 56, 0.35);
  border-color: var(--line-dark);
}
.on-dark .mini-card__value { color: var(--silver-050); }
.on-dark .mini-card p { color: var(--mist); }

/* Nearby areas link row */
.area-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0.75rem;
  margin: 1.6rem 0 1.4rem;
}
.area-links a {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  color: var(--silver-200);
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.area-links a:hover {
  color: var(--white);
  border-color: var(--silver-400);
  background: rgba(13, 34, 56, 0.5);
}

/* Footer: Areas We Cover (expandable) */
.footer__areas {
  border-top: 1px solid var(--line-dark);
  padding-block: 1.1rem;
}
.footer__areas summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--silver-300);
  transition: color var(--t-fast);
}
.footer__areas summary::-webkit-details-marker { display: none; }
.footer__areas summary::after {
  content: "+";
  margin-left: 0.6rem;
  font-weight: 400;
  letter-spacing: 0;
}
.footer__areas[open] summary::after { content: "\2212"; }
.footer__areas summary:hover { color: var(--white); }
.footer__areas-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.4rem;
  padding-top: 1rem;
}
.footer__areas-links a {
  font-size: 0.92rem;
  color: var(--mist-soft);
  transition: color var(--t-fast);
}
.footer__areas-links a:hover { color: var(--silver-100); }

/* Hero photo framing: keeps the subject visible when the image is cropped on
   narrow screens. Used where the building sits off-centre in the photo. */
.page-hero__media img.pos-right { object-position: 72% center; }