/* ============================================================
   Rust Free Globe — Industrial Steel & Copper
   Charcoal graphite · brushed steel · warm copper/bronze
   ============================================================ */

:root {
  /* Copper / bronze accents (replaces rust orange) */
  --rust-deep: #7A4A24;
  --rust-mid: #B87333;
  --rust-bright: #C9894A;
  /* Graphite / brushed steel */
  --steel-dark: #15181A;
  --steel-mid: #3D454C;
  --steel-light: #B8BFC5;
  /* Metallic highlight — champagne copper, not yellow-gold */
  --spark-gold: #C9A06A;
  /* Refined cool green for sustainability / pass states */
  --forest-green: #3D5C4E;
  --leaf-green: #5C7A6E;
  /* Cool white (not warm cream) */
  --white-off: #F2F4F5;
  --success-pass: #5C7A6E;
  --text-on-dark: #F2F4F5;
  --text-on-light: #15181A;
  --copper: #B87333;
  --graphite: #15181A;
  /* Cool light steel — header/footer (avoids warm cream bias) */
  --chrome-light: #EEF1F3;
  --chrome-mid: #E2E6EA;
  --chrome-border: #C9D0D6;
  --ink: #1C2226;
  --header-h: 64px;
  --font-display: "Libre Caslon Text", Georgia, serif;
  --font-sans: "Sora", "Source Sans 3", sans-serif;
  --font-body: "Source Sans 3", "Sora", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 2px;
  --shadow-soft: 0 18px 50px rgba(0, 0, 0, 0.35);
  --container: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text-on-light);
  background: var(--white-off);
  line-height: 1.65;
  overflow-x: hidden;
}
body.nav-open { overflow: hidden; }
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--rust-mid); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 700;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.75rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.55rem); font-family: var(--font-sans); font-weight: 600; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--copper); color: #fff; padding: .75rem 1rem; z-index: 1000;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.container { width: min(100% - 2.5rem, var(--container)); margin-inline: auto; }
.section { padding: clamp(3.5rem, 7vw, 6.5rem) 0; position: relative; }
.section-dark {
  background-color: var(--steel-dark);
  background-image:
    linear-gradient(180deg, rgba(21,24,26,.88), rgba(21,24,26,.92)),
    url("../images/textures/graphite-metal.webp");
  background-size: auto, cover;
  background-position: center;
  color: var(--text-on-dark);
}
.section-pillars {
  background-color: var(--steel-dark);
  background-image:
    linear-gradient(180deg, rgba(21,24,26,.72), rgba(21,24,26,.82)),
    url("../images/textures/bg-pillars.webp");
  background-size: auto, cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-on-dark);
}
.section-framework {
  background-color: var(--steel-dark);
  background-image:
    linear-gradient(160deg, rgba(21,24,26,.78), rgba(21,24,26,.88)),
    url("../images/textures/bg-framework.webp");
  background-size: auto, cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-on-dark);
}
.section-light { background: var(--white-off); color: var(--text-on-light); }
.section-steel {
  background-color: var(--steel-dark);
  background-image:
    linear-gradient(135deg, rgba(21,24,26,.78), rgba(61,69,76,.7)),
    url("../images/textures/bg-corrosion.webp");
  background-size: auto, cover;
  background-position: center;
  color: var(--text-on-dark);
}
.section-copper {
  background-color: var(--steel-dark);
  background-image:
    linear-gradient(160deg, rgba(21,24,26,.86), rgba(122,74,36,.55)),
    url("../images/textures/copper-rust.webp");
  background-size: auto, cover;
  background-position: center;
  color: var(--text-on-dark);
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: .78rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--spark-gold);
  font-weight: 600;
  margin-bottom: .85rem;
}
.section-dark .eyebrow, .section-steel .eyebrow, .section-copper .eyebrow,
.section-pillars .eyebrow, .section-framework .eyebrow { color: var(--spark-gold); }
.lead { font-size: 1.125rem; max-width: 62ch; color: var(--steel-mid); }
.section-dark .lead, .section-steel .lead, .section-copper .lead,
.section-pillars .lead, .section-framework .lead { color: var(--steel-light); }

/* Spark diagonal divider */
.spark-divider {
  height: 3px; width: 100%;
  background: linear-gradient(90deg, var(--rust-deep), var(--rust-bright) 35%, var(--spark-gold) 50%, var(--steel-light) 70%, var(--steel-mid));
  clip-path: polygon(0 40%, 100% 0, 100% 100%, 0 100%);
  transform-origin: left center;
  scale: 0 1;
  transition: scale 1.1s var(--ease);
}
.spark-divider.is-inview { scale: 1 1; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  font-family: var(--font-sans); font-weight: 600; font-size: .92rem;
  padding: .95rem 1.55rem; border: 1px solid transparent; border-radius: var(--radius);
  cursor: pointer; transition: transform .25s var(--ease), background .25s, color .25s, border-color .25s;
  text-decoration: none; letter-spacing: .02em;
}
.btn:hover { transform: translateY(-2px); color: inherit; }
.btn-primary { background: var(--copper); color: #F2F4F5; }
.btn-primary:hover { background: var(--rust-bright); color: #fff; }
.btn-secondary {
  background: transparent; color: var(--white-off);
  border-color: rgba(245,243,239,.45);
}
.btn-secondary:hover { border-color: var(--spark-gold); color: var(--spark-gold); }
.btn-outline-dark {
  background: transparent; color: var(--steel-dark); border-color: var(--steel-mid);
}
.btn-outline-dark:hover { border-color: var(--rust-mid); color: var(--rust-mid); }
.btn-group { display: flex; flex-wrap: wrap; gap: .85rem; }

/* Header — redesigned industrial chrome bar */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--chrome-light);
  transition: box-shadow .3s, background .3s;
}
.site-header.is-scrolled {
  box-shadow: 0 10px 32px rgba(21, 24, 26, .1);
}
.header-top {
  background: var(--steel-dark);
  color: var(--steel-light);
  font-family: var(--font-sans);
  font-size: .75rem;
  letter-spacing: .04em;
}
.header-top-inner {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.header-tag {
  margin: 0;
  color: var(--spark-gold);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .68rem;
}
.header-top-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.header-top-links a {
  color: var(--steel-light);
  text-decoration: none;
  transition: color .2s;
}
.header-top-links a:hover { color: var(--copper); }

.header-main {
  background:
    linear-gradient(180deg, #F7F8F9 0%, var(--chrome-light) 100%);
  border-bottom: 1px solid var(--chrome-border);
}
.header-inner {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  transition: min-height .3s var(--ease);
  overflow: visible;
}
.site-header.is-scrolled .header-inner { min-height: 52px; }

.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  text-decoration: none;
  flex-shrink: 0;
  color: var(--steel-dark);
}
.brand:hover { color: var(--steel-dark); }
.brand .brand-logo {
  width: auto;
  height: 40px;
  max-width: min(240px, 48vw);
  object-fit: contain;
  object-position: left center;
  display: block;
}
.site-header.is-scrolled .brand .brand-logo { height: 34px; }

.primary-nav {
  display: flex;
  align-items: center;
  gap: .1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.primary-nav a {
  font-family: var(--font-sans);
  font-size: .88rem;
  font-weight: 500;
  color: var(--steel-mid);
  text-decoration: none;
  padding: .4rem .72rem;
  letter-spacing: .01em;
  text-transform: none;
  position: relative;
  transition: color .2s;
}
.primary-nav a:hover,
.primary-nav a.is-active {
  color: var(--steel-dark);
}
.primary-nav a.is-active::after {
  content: "";
  position: absolute;
  left: .72rem;
  right: .72rem;
  bottom: .15rem;
  height: 2px;
  background: linear-gradient(90deg, var(--copper), var(--spark-gold));
}
.primary-nav .nav-cta {
  margin-left: .65rem;
  background: var(--copper);
  color: #fff !important;
  padding: .7rem 1.15rem;
  border-radius: 0;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 50%, calc(100% - 10px) 100%, 0 100%);
  letter-spacing: .06em;
  font-weight: 600;
}
.primary-nav .nav-cta:hover {
  background: var(--rust-deep);
  color: #fff !important;
}
.primary-nav .nav-cta.is-active::after { display: none; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--chrome-border);
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--steel-dark);
  width: 18px;
  transition: .25s;
}

.header-spark {
  height: 3px;
  background: linear-gradient(90deg, var(--forest-green), var(--copper) 35%, var(--spark-gold) 65%, var(--steel-mid));
}

/* Hero slider */
.hero {
  position: relative; min-height: clamp(420px, 68vh, 620px);
  display: grid; place-items: stretch; overflow: hidden;
  color: var(--white-off);
  background: var(--steel-dark);
}
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  opacity: 0; visibility: hidden;
  transition: opacity .9s var(--ease), visibility .9s;
  z-index: 1;
}
.hero-slide.is-active {
  opacity: 1; visibility: visible; z-index: 2;
}
.hero-slide-bg {
  position: absolute; inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  transform: scale(1.06);
  transition: transform 7s linear;
}
.hero-slide.is-active .hero-slide-bg { transform: scale(1); }
.hero-slide-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(115deg,
      rgba(21,24,26,.88) 0%,
      rgba(21,24,26,.62) 38%,
      rgba(184,115,51,.2) 50%,
      rgba(21,24,26,.55) 62%,
      rgba(21,24,26,.9) 100%);
}
.hero-content {
  position: relative; z-index: 3;
  width: min(100% - 2.5rem, 820px);
  padding: 3rem 0 4.5rem;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease) .15s, transform .7s var(--ease) .15s;
}
.hero-slide.is-active .hero-content {
  opacity: 1; transform: none;
}
.hero h1 { margin-bottom: .4em; text-shadow: 0 10px 40px rgba(0,0,0,.45); }
.hero .subhead {
  font-family: var(--font-sans); font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: var(--spark-gold); font-weight: 600; margin-bottom: .75rem;
}
.hero .precision {
  font-family: var(--font-sans); letter-spacing: .14em; text-transform: uppercase;
  font-size: .78rem; color: var(--steel-light); margin-bottom: 1.5rem;
}
.trust-strip {
  margin-top: 1.25rem;
  font-family: var(--font-sans); font-size: .88rem; letter-spacing: .06em;
  color: var(--steel-light); text-transform: uppercase;
}
.hero-spark-line {
  position: absolute; inset: 0; z-index: 4; pointer-events: none;
  background: linear-gradient(115deg, transparent 47.5%, var(--copper) 49.5%, transparent 52%);
  opacity: .45;
  animation: sparkPulse 4.5s ease-in-out infinite;
}
@keyframes sparkPulse {
  0%, 100% { opacity: .3; filter: blur(0); }
  50% { opacity: .65; filter: blur(.5px); }
}

/* Hero controls */
.hero-controls {
  position: absolute; z-index: 5;
  left: 50%; bottom: 2rem; transform: translateX(-50%);
  display: flex; align-items: center; gap: 1rem;
  width: min(100% - 2rem, 420px); justify-content: center;
}
.hero-arrow {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid rgba(242,244,245,.35);
  background: rgba(21,24,26,.55); color: var(--white-off);
  display: grid; place-items: center; cursor: pointer;
  backdrop-filter: blur(8px);
  transition: background .25s, border-color .25s, color .25s;
}
.hero-arrow:hover {
  background: var(--copper); border-color: var(--copper); color: #fff;
}
.hero-dots { display: flex; gap: .55rem; align-items: center; }
.hero-dot {
  width: 10px; height: 10px; border-radius: 50%;
  border: 1px solid rgba(242,244,245,.5);
  background: transparent; padding: 0; cursor: pointer;
  transition: width .3s var(--ease), background .3s, border-color .3s;
}
.hero-dot.is-active {
  width: 28px; border-radius: 999px;
  background: var(--copper); border-color: var(--copper);
}
.hero-progress {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 5;
  height: 3px; background: rgba(242,244,245,.12);
}
.hero-progress-bar {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--copper), var(--spark-gold));
  transform-origin: left center;
}
.hero-progress-bar.is-running {
  animation: heroProgress var(--hero-duration, 6s) linear forwards;
}
@keyframes heroProgress { from { width: 0%; } to { width: 100%; } }
.hero-counter {
  position: absolute; z-index: 5;
  right: clamp(1rem, 4vw, 2.5rem); bottom: 2.15rem;
  font-family: var(--font-mono); font-size: .9rem; letter-spacing: .08em;
  color: var(--steel-light);
}
.hero-counter-current { color: var(--copper); font-weight: 600; }
.hero-counter-sep { margin: 0 .25rem; opacity: .5; }

@media (max-width: 768px) {
  .hero-content { padding: 2.25rem 0 5.75rem; }
  .hero-counter { display: none; }
  .hero-controls {
    left: 50%;
    right: auto;
    bottom: 1.25rem;
    transform: translateX(-50%);
    width: auto;
    max-width: calc(100% - 2rem);
    padding: 0 .25rem;
    gap: .75rem;
    justify-content: center;
  }
}

/* Reveal animations */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.is-inview { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* Pillars */
.pillars-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; margin-top: 2.5rem;
}
.pillar-card {
  position: relative; padding: 1.75rem 1.4rem; overflow: hidden;
  background: linear-gradient(160deg, #1e2226, #15181A);
  border: 1px solid rgba(184,191,197,.12);
  transition: transform .35s var(--ease), border-color .35s;
}
.pillar-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(125deg, rgba(184,115,51,.28), transparent 48%, transparent 52%, rgba(184,191,197,.08));
  opacity: .9; transition: opacity .45s, transform .45s var(--ease);
  transform: translateX(0);
}
.pillar-card:hover { transform: translateY(-4px); border-color: rgba(184,115,51,.45); }
.pillar-card:hover::before { transform: translateX(8%); opacity: .45; }
.pillar-card > * { position: relative; z-index: 1; }
.pillar-icon {
  width: 48px; height: 48px; margin-bottom: 1rem;
  color: var(--spark-gold);
}
.pillar-card h3 { color: var(--white-off); margin-bottom: .5rem; }
.pillar-card p { color: var(--steel-light); font-size: .95rem; margin: 0; }

/* Cost of Corrosion — modern data story */
.section-corrosion {
  background-color: var(--steel-dark);
  background-image:
    linear-gradient(160deg, rgba(21,24,26,.92), rgba(21,24,26,.78) 40%, rgba(122,74,36,.4)),
    url("../images/textures/bg-corrosion.webp");
  background-size: auto, cover;
  background-position: center;
  color: var(--text-on-dark);
}
.section-corrosion .eyebrow { color: var(--spark-gold); }
.section-corrosion .lead { color: var(--steel-light); }
.corrosion-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.corrosion-head .lead { margin-bottom: 0; max-width: 56ch; }
.corrosion-pulse {
  min-width: 120px;
  padding: 1.1rem 1.2rem;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(184,115,51,.45);
  border-left: 3px solid var(--copper);
}
.corrosion-pulse-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  color: var(--copper);
  line-height: 1;
}
.corrosion-pulse-label {
  display: block;
  margin-top: .35rem;
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--steel-light);
}
.corrosion-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.75rem;
}
.corrosion-metric {
  padding: 1.35rem 1.25rem;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(199,205,209,.12);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 148px;
}
.corrosion-metric::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--copper), transparent);
}
.corrosion-metric-kicker {
  display: block;
  font-family: var(--font-sans);
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--spark-gold);
  margin-bottom: .55rem;
}
.corrosion-metric-value {
  display: flex;
  flex-wrap: nowrap;
  align-items: baseline;
  gap: .4rem;
  min-height: 2.5rem;
  margin-bottom: .15rem;
}
.corrosion-metric .num-prefix,
.corrosion-metric .num-unit {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  font-weight: 600;
  color: rgba(242,244,245,.88);
  white-space: nowrap;
  flex-shrink: 0;
}
.corrosion-metric .num {
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 2.8vw, 2.25rem);
  font-weight: 600;
  color: #F2F4F5;
  display: inline-block;
  line-height: 1.15;
  white-space: nowrap;
}
.corrosion-metric p {
  margin: auto 0 0;
  color: var(--steel-light);
  font-size: .9rem;
}
.corrosion-map-stage {
  margin-bottom: 1.25rem;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(199,205,209,.12);
  padding: 1.25rem 1.25rem 1.15rem;
}
.corrosion-map-lead {
  margin: .45rem 0 0;
  color: var(--steel-light);
  font-size: .95rem;
  max-width: 54ch;
}
.corrosion-map-layout {
  display: grid;
  grid-template-columns: 1.5fr .85fr;
  gap: 1rem;
  margin-top: 1rem;
  align-items: stretch;
}
.corrosion-map-frame {
  position: relative;
  background: #0b0d0f;
  border: 1px solid rgba(199,205,209,.12);
  overflow: hidden;
}
.india-live-map {
  height: 520px;
  width: 100%;
  background: #0b0d0f;
  z-index: 1;
}
.map-hint {
  position: absolute;
  left: .75rem;
  bottom: .75rem;
  z-index: 500;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: rgba(242,244,245,.7);
  background: rgba(21,24,26,.72);
  padding: .35rem .55rem;
  pointer-events: none;
}
.severity-panel {
  background: rgba(0,0,0,.22);
  border: 1px solid rgba(199,205,209,.12);
  padding: 1.15rem 1.1rem;
}
.severity-panel-title {
  margin: 0 0 .75rem;
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--spark-gold);
}
.severity-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}
.severity-list li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: .7rem;
  align-items: start;
  padding: .55rem .5rem;
  border: 1px solid transparent;
  transition: background .2s, border-color .2s;
  cursor: pointer;
}
.severity-list li:hover,
.severity-list li.is-active {
  background: rgba(255,255,255,.05);
  border-color: rgba(184,115,51,.35);
}
.severity-swatch {
  width: 16px;
  height: 16px;
  margin-top: .15rem;
  display: block;
}
.severity-meta strong {
  display: block;
  font-family: var(--font-sans);
  font-size: .9rem;
  color: #F2F4F5;
  font-weight: 600;
}
.severity-meta em {
  display: block;
  margin-top: .15rem;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: rgba(184,191,197,.78);
  line-height: 1.35;
}
.severity-cities {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.severity-cities button {
  font-family: var(--font-sans);
  font-size: .78rem;
  font-weight: 600;
  padding: .45rem .7rem;
  border: 1px solid rgba(199,205,209,.2);
  background: rgba(255,255,255,.04);
  color: var(--steel-light);
  cursor: pointer;
  transition: background .2s, border-color .2s, color .2s;
}
.severity-cities button:hover,
.severity-cities button.is-active {
  background: rgba(184,115,51,.18);
  border-color: rgba(184,115,51,.55);
  color: #F2F4F5;
}
.geo-insight-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}
.geo-insight-list li {
  padding-left: 1rem;
  border-left: 2px solid var(--copper);
  color: var(--steel-light);
  font-size: .92rem;
  line-height: 1.45;
}
.geo-insight-list strong { color: #F2F4F5; }
.city-pin {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #15181A;
  border: 2px solid #F2F4F5;
  box-shadow: 0 0 0 3px rgba(184,115,51,.55), 0 0 16px rgba(184,115,51,.45);
}
.city-pin-label {
  font-family: "Sora", sans-serif;
  font-size: 11px;
  font-weight: 700;
  color: #15181A;
  background: #F2F4F5;
  padding: 2px 6px;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0,0,0,.25);
}
.corrosion-bento {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.corrosion-chart-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(199,205,209,.12);
  padding: 1.25rem 1.25rem 1.15rem;
  backdrop-filter: blur(6px);
}
.corrosion-chart-card.is-wide { margin-bottom: 1rem; }
.corrosion-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.corrosion-card-head h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  color: #F2F4F5;
}
.corrosion-card-head .eyebrow { margin-bottom: .35rem; }
.corrosion-card-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: rgba(184,191,197,.7);
  letter-spacing: .04em;
  text-align: right;
}
.chip-pct {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 600;
  color: var(--copper);
  border: 1px solid rgba(184,115,51,.4);
  padding: .25rem .5rem;
}
.india-live-map .leaflet-container {
  background: #f4f1ea;
  font-family: var(--font-sans);
  height: 100%;
  width: 100%;
}
.chart-donut-wrap {
  position: relative;
  max-width: 300px;
  margin: 0 auto;
}
.chart-donut-wrap canvas { max-height: 280px; }
.chart-donut-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  pointer-events: none;
  padding-top: .25rem;
}
.chart-donut-center strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: #F2F4F5;
}
.chart-donut-center span {
  display: block;
  margin-top: .2rem;
  font-size: .75rem;
  color: var(--steel-light);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.chart-footnote {
  margin: 1rem 0 0;
  text-align: center;
  font-size: .8rem;
  color: rgba(184,191,197,.7);
}
.chart-bar-wrap {
  height: 280px;
  position: relative;
}
.chart-bar-wrap canvas { width: 100% !important; height: 100% !important; }
.corrosion-breakdown-head {
  margin: 1.75rem 0 1rem;
}
.corrosion-breakdown-head h3 {
  margin: 0;
  font-size: 1.25rem;
  color: #F2F4F5;
}
.corrosion-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.corrosion-breakdown canvas { max-height: 220px; }
.callout-line {
  margin-top: 2rem; padding: 1.15rem 1.35rem;
  border-left: 3px solid var(--copper);
  background: rgba(184,115,51,.14);
  font-family: var(--font-sans); font-weight: 600; color: var(--white-off);
}
.map-legend { display: flex; flex-wrap: wrap; gap: .65rem 1.1rem; font-size: .82rem; }
.map-legend span { display: inline-flex; align-items: center; gap: .4rem; color: var(--steel-light); }
.map-legend i { width: 12px; height: 12px; display: inline-block; border-radius: 1px; }

/* Leaflet severity markers */
.severity-pin {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(242,244,245,.85);
  box-shadow: 0 0 0 4px rgba(0,0,0,.25), 0 0 18px currentColor;
}
.leaflet-popup-content-wrapper {
  background: #1a1e22;
  color: #F2F4F5;
  border-radius: 0;
  box-shadow: 0 12px 30px rgba(0,0,0,.35);
}
.leaflet-popup-tip { background: #1a1e22; }
.leaflet-popup-content {
  margin: .75rem .9rem;
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: .85rem;
  line-height: 1.4;
}
.leaflet-popup-content strong { color: #C9A06A; }

/* Causes — icon card grid */
.section-causes {
  background:
    linear-gradient(180deg, rgba(242,244,245,.92), rgba(238,241,243,.96)),
    url("../images/textures/brushed-steel.webp") center / cover;
  color: var(--text-on-light);
}
.causes-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.25rem;
}
.causes-head .lead { margin-bottom: 0; }
.causes-badge {
  flex-shrink: 0;
  min-width: 150px;
  padding: 1.1rem 1.25rem;
  background: var(--steel-dark);
  color: var(--white-off);
  border-left: 3px solid var(--copper);
  text-align: left;
}
.causes-badge-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--copper);
  letter-spacing: .04em;
}
.causes-badge-label {
  display: block;
  margin-top: .3rem;
  font-family: var(--font-sans);
  font-size: .75rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel-light);
}
.causes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.cause-card {
  position: relative;
  padding: 0;
  background: #1a1e22;
  border: 1px solid rgba(61,69,76,.18);
  border-top: 3px solid transparent;
  overflow: hidden;
  min-height: 300px;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.cause-card-media {
  border-top-color: transparent;
}
.cause-card-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  filter: brightness(1.05) contrast(1.06) saturate(1.05);
  transform: scale(1.02);
  transition: transform .45s var(--ease), filter .35s;
}
.cause-card:hover .cause-card-img {
  transform: scale(1.08);
  filter: brightness(1.1) contrast(1.08) saturate(1.1);
}
.cause-card-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(21,24,26,.15) 0%, rgba(21,24,26,.08) 42%, rgba(21,24,26,.78) 100%);
  pointer-events: none;
  z-index: 1;
}
.cause-card-body {
  position: relative;
  z-index: 2;
  padding: 1.35rem 1.25rem 1.45rem;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.cause-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--copper), var(--spark-gold));
  opacity: .95;
  z-index: 3;
  transition: opacity .3s;
}
.cause-card:hover {
  transform: translateY(-4px);
  border-color: rgba(184,115,51,.5);
  border-top-color: var(--copper);
  box-shadow: 0 18px 44px rgba(21,24,26,.28);
}
.cause-card:hover::before { opacity: 1; }
.cause-icon {
  width: 44px;
  height: 44px;
  margin-bottom: .75rem;
  color: var(--spark-gold);
  display: grid;
  place-items: center;
  filter: drop-shadow(0 1px 6px rgba(0,0,0,.55));
}
.cause-icon svg { width: 36px; height: 36px; }
.cause-card h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 .4rem;
  color: #fff;
  text-shadow: 0 1px 10px rgba(0,0,0,.55);
}
.cause-card p {
  margin: 0;
  font-size: .88rem;
  color: rgba(255,255,255,.9);
  line-height: 1.5;
  text-shadow: 0 1px 8px rgba(0,0,0,.5);
}
.causes-foot {
  margin: 2rem 0 0;
  max-width: 58ch;
  font-family: var(--font-sans);
  font-size: .95rem;
  color: var(--steel-mid);
  border-left: 3px solid var(--copper);
  padding-left: 1rem;
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: .25rem;
}
.impact-item {
  padding: 1rem 1.1rem;
  background: #fff;
  border: 1px solid rgba(58,65,71,.12);
  border-top: 3px solid var(--copper);
}
.impact-item strong {
  display: block;
  font-family: var(--font-sans);
  font-size: .92rem;
  margin-bottom: .35rem;
  color: var(--steel-dark);
}
.impact-item span {
  font-size: .85rem;
  color: var(--steel-mid);
  line-height: 1.45;
}

.conventional-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 1.75rem;
}
.conventional-card {
  padding: 1.35rem 1.5rem;
  background: #fff;
  border: 1px solid rgba(58,65,71,.12);
}
.conventional-card.is-accent {
  background: linear-gradient(160deg, #1c2226, #2a3238);
  color: var(--white-off);
  border-color: transparent;
}
.conventional-card h3 {
  margin: 0 0 .85rem;
  font-size: 1.05rem;
}
.conventional-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: .92rem;
  line-height: 1.55;
  color: var(--steel-mid);
}
.conventional-card.is-accent ul { color: rgba(242,244,245,.82); }
.conventional-card.is-accent strong { color: var(--spark-gold); }

.system-stack .stack-steps {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: stack;
}
.system-stack .stack-steps li {
  counter-increment: stack;
  font-family: var(--font-sans);
  font-size: .82rem;
  font-weight: 600;
  padding: .55rem .85rem;
  background: var(--steel-dark);
  color: var(--white-off);
  border-left: 3px solid var(--spark-gold);
}
.system-stack .stack-steps li::before {
  content: counter(stack) ". ";
  color: var(--spark-gold);
}

/* Cause chips (legacy fallback) */
.cause-chips { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1.75rem; }
.chip {
  font-family: var(--font-sans); font-size: .85rem; font-weight: 500;
  padding: .55rem .95rem; border: 1px solid rgba(184,115,51,.35);
  background: linear-gradient(135deg, rgba(184,115,51,.1), rgba(21,24,26,.04));
  color: var(--steel-dark);
}
.section-dark .chip {
  border-color: rgba(184,115,51,.4);
  background: rgba(184,115,51,.14);
  color: var(--white-off);
}

/* Framework process */
.framework-track {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; margin-top: 3rem; position: relative;
}
.framework-track::before {
  content: ""; position: absolute; top: 28px; left: 8%; right: 8%; height: 2px;
  background: linear-gradient(90deg, var(--rust-mid), var(--spark-gold), var(--steel-light));
  opacity: .5; z-index: 0;
}
.framework-step {
  position: relative; z-index: 1; text-align: center; padding: 0 .5rem;
  opacity: .35; transform: translateY(12px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.framework-step.is-lit { opacity: 1; transform: none; }
.framework-step .step-num {
  width: 56px; height: 56px; margin: 0 auto 1rem; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-weight: 600; font-size: 1.1rem;
  background: var(--steel-dark); color: var(--spark-gold);
  border: 2px solid var(--rust-bright);
  box-shadow: 0 0 0 0 rgba(232,184,75,.4);
}
.framework-step.is-lit .step-num {
  box-shadow: 0 0 0 6px rgba(232,184,75,.15);
  border-color: var(--spark-gold);
}
.framework-step h3 { font-size: .95rem; margin-bottom: .4rem; }
.framework-step p { font-size: .82rem; color: var(--steel-mid); margin: 0; }
.section-dark .framework-step p,
.section-framework .framework-step p { color: var(--steel-light); }

/* Cards — rust wipe */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-top: 2rem; }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }
.card-grid-featured { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.rf-card {
  position: relative; overflow: hidden; background: #fff;
  border: 1px solid rgba(58,65,71,.15); min-height: 280px;
  display: flex; flex-direction: column;
}
.rf-card .card-media {
  aspect-ratio: 16/10; background: var(--steel-mid); position: relative; overflow: hidden;
}
.rf-card .card-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .45s var(--ease);
}
.rf-card:hover .card-media img { transform: scale(1.04); }
.rf-card .card-body { padding: 1.25rem 1.35rem 1.5rem; flex: 1; display: flex; flex-direction: column; color: var(--text-on-light); }
.rf-card h3 { font-size: 1.15rem; margin-bottom: .45rem; color: var(--steel-dark); }
.rf-card p { color: var(--steel-mid); font-size: .95rem; flex: 1; }
.rf-card .card-link {
  font-family: var(--font-sans); font-size: .85rem; font-weight: 600;
  color: var(--rust-mid); text-decoration: none; margin-top: .75rem;
}
.rf-card .card-link:hover { color: var(--rust-deep); }

/* Marquee */
.marquee-wrap { overflow: hidden; margin-top: 2rem; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track {
  display: flex; gap: 1rem; width: max-content;
  animation: marquee 45s linear infinite;
}
@keyframes marquee { to { transform: translateX(-50%); } }
.client-chip {
  flex: 0 0 auto; padding: .85rem 1.35rem;
  background: rgba(255,255,255,.04); border: 1px solid rgba(199,205,209,.15);
  font-family: var(--font-sans); font-size: .88rem; font-weight: 500; color: var(--steel-light);
  white-space: nowrap;
}

/* CTA banner */
.cta-banner {
  position: relative; overflow: hidden; text-align: center; padding: 4.5rem 1.5rem;
  background:
    linear-gradient(115deg, rgba(21,24,26,.88) 0%, rgba(21,24,26,.72) 45%, rgba(184,115,51,.35) 100%),
    url("../images/textures/copper-rust.webp") center / cover no-repeat;
  color: var(--white-off);
}
.cta-banner h2 { margin-bottom: 1.25rem; }

/* Page hero (inner pages) */
.page-hero {
  position: relative; padding: 4.5rem 0 3.5rem; color: var(--white-off); overflow: hidden;
  background:
    linear-gradient(115deg, rgba(21,24,26,.9) 0%, rgba(21,24,26,.75) 48%, rgba(184,115,51,.28) 100%),
    url("../images/textures/graphite-metal.webp") center / cover no-repeat;
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 46%, rgba(184,115,51,.5) 49.5%, transparent 53%);
  opacity: .45; pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero p { max-width: 60ch; color: var(--steel-light); }

/* About */
.two-col { display: grid; grid-template-columns: 1.1fr .9fr; gap: 2.5rem; align-items: start; }
.timeline { margin-top: 2rem; border-left: 2px solid var(--rust-mid); padding-left: 1.5rem; }
.timeline-item { position: relative; margin-bottom: 1.75rem; }
.timeline-item::before {
  content: ""; position: absolute; left: -1.9rem; top: .35rem;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--spark-gold); border: 2px solid var(--steel-dark);
}
.timeline-item .year {
  font-family: var(--font-mono); color: var(--rust-mid); font-weight: 600; font-size: .9rem;
}
.vision-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin-top: 2rem; }
.vision-card {
  padding: 2rem 1.75rem; background: #fff; border: 1px solid rgba(58,65,71,.12);
  border-top: 3px solid var(--forest-green);
  color: var(--text-on-light);
}
.vision-card.mission { border-top-color: var(--spark-gold); }
.vision-card .icon-wrap {
  width: 48px; height: 48px; margin-bottom: 1rem; color: var(--forest-green);
}
.vision-card h3 {
  color: var(--steel-dark);
  margin: 0 0 .65rem;
}
.vision-card p {
  margin: 0;
  color: var(--steel-mid);
  line-height: 1.6;
}
.section-sectors {
  background:
    linear-gradient(180deg, rgba(242,244,245,.94), rgba(238,241,243,.98)),
    url("../images/textures/brushed-steel.webp") center / cover;
  color: var(--text-on-light);
}
.sectors-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.sectors-head .lead { margin-bottom: 0; }
.sectors-count {
  flex-shrink: 0;
  min-width: 120px;
  padding: 1rem 1.15rem;
  background: var(--steel-dark);
  color: var(--white-off);
  border-left: 3px solid var(--copper);
}
.sectors-count-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--copper);
  line-height: 1;
}
.sectors-count-label {
  display: block;
  margin-top: .35rem;
  font-family: var(--font-sans);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--steel-light);
}
.sector-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 0;
}
.sector-card {
  position: relative;
  padding: 1.35rem 1.25rem 1.4rem;
  min-height: 168px;
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(61,69,76,.12);
  overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.sector-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--copper), var(--spark-gold));
  opacity: 0;
  transition: opacity .3s;
}
.sector-card:hover {
  transform: translateY(-4px);
  border-color: rgba(184,115,51,.4);
  box-shadow: 0 16px 36px rgba(21,24,26,.1);
}
.sector-card:hover::before { opacity: 1; }
.sector-icon {
  width: 44px;
  height: 44px;
  margin-bottom: .9rem;
  color: var(--copper);
  display: grid;
  place-items: center;
}
.sector-icon svg { width: 36px; height: 36px; }
.sector-card h3 {
  font-family: var(--font-sans);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--steel-dark);
  margin: 0 0 .4rem;
  line-height: 1.3;
}
.sector-card p {
  margin: 0;
  font-size: .88rem;
  color: var(--steel-mid);
  line-height: 1.5;
}
.leadership-card {
  margin-top: 2rem; display: grid; grid-template-columns: 120px 1fr; gap: 1.5rem;
  padding: 1.5rem; background: #fff; border: 1px solid rgba(58,65,71,.12);
  align-items: center;
}
.leadership-photo {
  width: 120px; height: 120px; border-radius: 50%;
  background: linear-gradient(135deg, var(--steel-mid), var(--steel-dark));
  display: grid; place-items: center; color: var(--steel-light); font-size: .75rem; text-align: center;
  overflow: hidden;
}

/* Products */
.filter-bar { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.5rem 0 2rem; }
.filter-btn {
  font-family: var(--font-sans); font-size: .82rem; font-weight: 500;
  padding: .5rem 1rem; border: 1px solid rgba(58,65,71,.25); background: transparent;
  cursor: pointer; color: var(--steel-dark); transition: .2s;
}
.filter-btn.is-active, .filter-btn:hover {
  background: var(--steel-dark); color: var(--white-off); border-color: var(--steel-dark);
}
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.product-card {
  position: relative; overflow: hidden; background: #fff;
  border: 1px solid rgba(58,65,71,.12); cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.product-card-media {
  position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--steel-dark);
}
.product-card-media img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform .5s var(--ease);
}
.product-card:hover .product-card-media img { transform: scale(1.04); }
.product-card .inner { position: relative; z-index: 2; padding: 1.5rem; background: #fff; color: var(--text-on-light); }
.product-card .cat {
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--rust-mid); font-family: var(--font-sans); font-weight: 600;
}
.product-card h3 {
  color: var(--steel-dark);
  margin: .5rem 0;
  font-size: 1.15rem;
}
.product-card .inner p {
  color: var(--steel-mid);
  margin: 0;
  font-size: .95rem;
}
/* Extended range */
.section-range {
  background: var(--white-off);
  color: var(--text-on-light);
}
.range-head { margin-bottom: 2rem; }
.range-head .lead { margin-bottom: 0; }
.range-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.range-card {
  position: relative;
  padding: 1.4rem 1.25rem 1.35rem;
  min-height: 168px;
  background: #fff;
  border: 1px solid rgba(61,69,76,.12);
  overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.range-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--copper), transparent);
  opacity: 0;
  transition: opacity .3s;
}
.range-card:hover {
  transform: translateY(-4px);
  border-color: rgba(184,115,51,.4);
  box-shadow: 0 16px 36px rgba(21,24,26,.08);
}
.range-card:hover::after { opacity: 1; }
.range-index {
  position: absolute;
  top: .85rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  color: rgba(61,69,76,.35);
  letter-spacing: .06em;
}
.range-icon {
  width: 40px;
  height: 40px;
  margin-bottom: .85rem;
  color: var(--copper);
  display: grid;
  place-items: center;
}
.range-icon svg { width: 32px; height: 32px; }
.range-card h3 {
  font-family: var(--font-sans);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--steel-dark);
  margin: 0 0 .4rem;
}
.range-card p {
  margin: 0;
  font-size: .88rem;
  color: var(--steel-mid);
  line-height: 1.5;
}

/* Technology benefits bento */
.section-benefits {
  background-color: var(--steel-dark);
  background-image:
    linear-gradient(145deg, rgba(21,24,26,.88), rgba(21,24,26,.72)),
    url("../images/textures/bg-corrosion.webp");
  background-size: auto, cover;
  background-position: center;
  color: var(--text-on-dark);
}
.section-benefits .eyebrow { color: var(--spark-gold); }
.section-benefits .lead { color: var(--steel-light); }
.benefits-head { margin-bottom: 2rem; }
.benefits-head .lead { margin-bottom: 0; }
.benefit-bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .85rem;
}
.benefit-tile {
  position: relative;
  padding: 1.35rem 1.2rem 1.3rem;
  min-height: 140px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(242,244,245,.12);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: transform .3s var(--ease), background .3s, border-color .3s;
}
.benefit-tile.is-featured {
  grid-column: span 2;
  grid-row: span 2;
  min-height: 280px;
  background:
    linear-gradient(160deg, rgba(184,115,51,.22), rgba(255,255,255,.04));
  border-color: rgba(184,115,51,.45);
}
.benefit-tile:hover {
  transform: translateY(-3px);
  background: rgba(255,255,255,.09);
  border-color: rgba(201,160,106,.45);
}
.benefit-num {
  position: absolute;
  top: 1rem;
  left: 1.1rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 600;
  color: var(--copper);
  letter-spacing: .08em;
}
.benefit-tile p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: .98rem;
  line-height: 1.45;
  color: #F2F4F5;
  font-weight: 500;
}
.benefit-tile.is-featured p {
  font-size: 1.25rem;
  max-width: 22ch;
}

/* Spec datasheet */
.section-specs {
  background:
    linear-gradient(180deg, #EEF1F3, var(--white-off));
  color: var(--text-on-light);
}
.specs-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}
.specs-head .lead { margin-bottom: 0; }
.specs-meta {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}
.specs-meta span {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .45rem .7rem;
  border: 1px solid rgba(61,69,76,.2);
  color: var(--steel-mid);
  background: #fff;
}
.spec-sheet {
  background: #fff;
  border: 1px solid rgba(61,69,76,.14);
  box-shadow: 0 18px 48px rgba(21,24,26,.06);
  overflow: hidden;
}
.spec-sheet-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 1.15rem;
  background: var(--steel-dark);
  color: var(--white-off);
}
.spec-sheet-title {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--spark-gold);
}
.spec-sheet-hint {
  font-family: var(--font-sans);
  font-size: .75rem;
  color: var(--steel-light);
}
.spec-table-wrap { overflow-x: auto; margin-top: 0; border: 0; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.spec-table th, .spec-table td {
  padding: .95rem 1.05rem;
  text-align: left;
  border-bottom: 1px solid rgba(58,65,71,.1);
}
.spec-table th {
  background: #F2F4F5;
  color: var(--steel-dark);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  position: sticky;
  top: 0;
}
.spec-table tr[data-expand] { cursor: pointer; transition: background .2s; }
.spec-table tbody tr[data-expand]:hover { background: rgba(184,115,51,.06); }
.spec-table tr.is-open { background: rgba(184,115,51,.08); }
.spec-table .num { font-family: var(--font-mono); color: var(--copper); width: 3rem; font-weight: 600; }
.spec-param { font-weight: 500; color: var(--steel-dark); }
.spec-code {
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--steel-mid);
  background: rgba(21,24,26,.04);
  padding: .2rem .45rem;
}
.spec-value { font-family: var(--font-mono); font-size: .88rem; color: var(--steel-dark); }
.spec-table .pass-badge {
  display: inline-block; padding: .2rem .55rem; background: rgba(76,168,94,.15);
  color: var(--forest-green); font-family: var(--font-mono); font-size: .8rem; font-weight: 600;
}
.spec-chev { width: 2rem; }
.spec-chev span {
  display: block;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--steel-mid);
  border-bottom: 2px solid var(--steel-mid);
  transform: rotate(45deg);
  margin: 0 auto;
  transition: transform .25s;
}
.spec-table tr.is-open .spec-chev span { transform: rotate(225deg); }
.spec-explain {
  display: none;
  background: linear-gradient(90deg, rgba(184,115,51,.08), rgba(28,34,38,.03));
  font-size: .9rem;
  color: var(--steel-mid);
}
.spec-explain td { padding: .9rem 1.15rem .95rem 4rem; border-bottom: 1px solid rgba(58,65,71,.08); }
.spec-table tr.is-open + .spec-explain { display: table-row; }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 200; background: rgba(14,16,18,.72);
  display: none; align-items: center; justify-content: center; padding: 1.5rem;
}
.modal-backdrop.is-open { display: flex; }
.modal {
  width: min(100%, 640px); max-height: 90vh; overflow-y: auto;
  background: var(--white-off); padding: 2rem; position: relative;
  border-top: 3px solid var(--spark-gold);
}
.modal-media {
  margin: -2rem -2rem 1.25rem; aspect-ratio: 16/9; overflow: hidden; background: var(--steel-dark);
}
.modal-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.modal-close {
  position: absolute; top: .75rem; right: .75rem; border: 0; background: transparent;
  font-size: 1.5rem; cursor: pointer; color: var(--steel-mid); line-height: 1;
}

/* Before/After slider */
.ba-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: stretch;
}
.ba-pair-item {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.ba-pair-item .ba-slider {
  width: 100%;
  aspect-ratio: 4 / 3;
}
.ba-slider {
  position: relative; aspect-ratio: 16/10; overflow: hidden;
  border: 1px solid rgba(58,65,71,.15); user-select: none; touch-action: none;
  background: var(--steel-dark);
  box-shadow: 0 18px 40px rgba(21,24,26,.1);
}
.ba-slider img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.ba-slider .ba-after { clip-path: inset(0 0 0 50%); }
.ba-slider .ba-handle {
  position: absolute; top: 0; bottom: 0; left: 50%; width: 3px;
  background: var(--spark-gold); transform: translateX(-50%); cursor: ew-resize; z-index: 3;
}
.ba-slider .ba-handle::after {
  content: "◀ ▶"; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  background: var(--steel-dark); color: var(--spark-gold); font-size: .65rem;
  padding: .4rem .5rem; border-radius: 2px; white-space: nowrap;
}
.ba-label {
  position: absolute; top: .75rem; z-index: 2;
  font-family: var(--font-sans); font-size: .72rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  background: rgba(28,34,38,.75); color: var(--white-off); padding: .3rem .55rem;
}
.ba-label.before { left: .75rem; }
.ba-label.after { right: .75rem; }

/* Gallery */
.gallery-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.5rem;
}
.gallery-item {
  position: relative; aspect-ratio: 4/3; overflow: hidden; cursor: pointer;
  border: 1px solid rgba(58,65,71,.12);
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.gallery-item:hover img { transform: scale(1.05); }
.gallery-item .cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: .85rem 1rem; background: linear-gradient(transparent, rgba(14,16,18,.85));
  color: var(--white-off); font-size: .85rem; font-family: var(--font-sans);
}
.lightbox {
  position: fixed; inset: 0; z-index: 250; background: rgba(10,12,14,.92);
  display: none; align-items: center; justify-content: center; padding: 2rem;
}
.lightbox.is-open { display: flex; }
.lightbox img { max-width: min(92vw, 1100px); max-height: 82vh; object-fit: contain; box-shadow: 0 20px 60px rgba(0,0,0,.45); }
.lightbox-cap {
  position: absolute; bottom: 1.25rem; left: 50%; transform: translateX(-50%);
  color: var(--steel-light); text-align: center; max-width: min(90vw, 720px);
  font-size: .95rem; margin: 0; padding: 0 .75rem;
}
.lightbox-close {
  position: absolute; top: 1rem; right: 1.25rem; background: none; border: 0;
  color: #fff; font-size: 2rem; cursor: pointer; z-index: 2;
}
.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
  color: #fff; width: 2.75rem; height: 2.75rem; border-radius: 50%;
  font-size: 1.1rem; cursor: pointer; z-index: 2;
  display: flex; align-items: center; justify-content: center;
}
.lightbox-nav:hover { background: rgba(201,160,106,.35); border-color: var(--spark-gold); }
.lightbox-nav.prev { left: 1rem; }
.lightbox-nav.next { right: 1rem; }

.filter-bar-dark .filter-btn {
  background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.18); color: var(--steel-light);
}
.filter-bar-dark .filter-btn.is-active,
.filter-bar-dark .filter-btn:hover {
  background: rgba(201,160,106,.2); border-color: var(--spark-gold); color: #fff;
}

.work-item { cursor: pointer; }
.work-item .overlay-cap {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.work-item .overlay-cap strong {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.25;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0,0,0,.55);
  border-left: 3px solid var(--spark-gold);
  padding-left: .65rem;
}

/* Clients */
.clients-split { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 2rem; }
.clients-col h3 {
  font-family: var(--font-sans); font-size: .85rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--rust-mid); margin-bottom: 1rem;
  padding-bottom: .5rem; border-bottom: 2px solid rgba(181,88,31,.3);
}
.client-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .65rem; }
.client-badge {
  padding: .9rem 1rem; background: #fff; border: 1px solid rgba(58,65,71,.12);
  font-family: var(--font-sans); font-size: .88rem; font-weight: 500;
  display: flex; align-items: center; gap: .65rem; min-height: 56px;
}
.client-badge img { width: 36px; height: 36px; object-fit: contain; }
.sector-public .client-badge { border-left: 3px solid var(--forest-green); }
.sector-private .client-badge { border-left: 3px solid var(--spark-gold); }

/* Contact */
.contact-hero {
  position: relative;
  padding: 4.5rem 0 3.25rem;
  color: var(--white-off);
  overflow: hidden;
}
.contact-hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(125deg, rgba(21,24,26,.9) 0%, rgba(21,24,26,.72) 48%, rgba(122,74,36,.55) 100%),
    url("../images/textures/copper-rust.webp") center / cover no-repeat;
}
.contact-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
}
.contact-hero-copy h1 {
  margin: 0 0 .75rem;
  max-width: 16ch;
}
.contact-hero-copy p:last-child {
  margin: 0;
  max-width: 52ch;
  color: var(--steel-light);
  font-size: 1.05rem;
}
.contact-channel-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .85rem;
}
.contact-channel {
  display: grid;
  gap: .35rem;
  padding: 1.15rem 1.2rem;
  text-decoration: none;
  color: var(--white-off);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(242,244,245,.14);
  transition: transform .25s var(--ease), border-color .25s, background .25s;
}
.contact-channel:hover {
  transform: translateY(-3px);
  background: rgba(255,255,255,.1);
  border-color: rgba(184,115,51,.55);
  color: var(--white-off);
}
.contact-channel-icon {
  width: 36px;
  height: 36px;
  color: var(--spark-gold);
  margin-bottom: .25rem;
}
.contact-channel-icon svg { width: 32px; height: 32px; }
.contact-channel-label {
  font-family: var(--font-sans);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--steel-light);
}
.contact-channel strong {
  font-family: var(--font-sans);
  font-size: .95rem;
  font-weight: 600;
  word-break: break-word;
}

.section-contact {
  background: var(--white-off);
  color: var(--text-on-light);
  padding-top: 3rem;
}
.contact-process {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.process-step {
  position: relative;
  padding: 1.35rem 1.25rem 1.3rem;
  background: #fff;
  border: 1px solid rgba(61,69,76,.12);
}
.process-step::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--copper), var(--spark-gold));
}
.process-num {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--copper);
  letter-spacing: .08em;
  margin-bottom: .55rem;
}
.process-step h3 {
  margin: 0 0 .35rem;
  font-size: 1.05rem;
  color: var(--steel-dark);
}
.process-step p {
  margin: 0;
  font-size: .9rem;
  color: var(--steel-mid);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.35fr .9fr;
  gap: 1.5rem;
  align-items: start;
}
.contact-form-panel {
  background: #fff;
  border: 1px solid rgba(61,69,76,.12);
  padding: 2rem 1.75rem 1.85rem;
  box-shadow: 0 18px 48px rgba(21,24,26,.06);
  position: relative;
}
.contact-form-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--copper), var(--spark-gold));
}
.contact-form-head {
  margin-bottom: 1.5rem;
}
.contact-form-head h2 {
  margin: 0 0 .4rem;
}
.contact-form-head p {
  margin: 0;
  color: var(--steel-mid);
  font-size: .95rem;
}
.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-group { margin-bottom: 1.1rem; }
.form-group label {
  display: block; font-family: var(--font-sans); font-size: .78rem; font-weight: 600;
  margin-bottom: .4rem; letter-spacing: .08em; text-transform: uppercase; color: var(--steel-mid);
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: .85rem 1rem; border: 1px solid rgba(58,65,71,.22);
  background: #F7F8F9; font-family: var(--font-body); font-size: 1rem;
  border-radius: var(--radius); transition: border-color .2s, box-shadow .2s, background .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--copper);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(184,115,51,.16);
}
.contact-submit { width: 100%; margin-top: .25rem; }
.contact-success { margin-top: .5rem; }
.honeypot { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }
.alert {
  padding: 1rem 1.25rem; margin-bottom: 1.25rem; font-family: var(--font-sans); font-size: .92rem;
}
.alert-success { background: rgba(76,168,94,.15); color: var(--forest-green); border-left: 3px solid var(--leaf-green); }
.alert-error { background: rgba(184,115,51,.12); color: var(--rust-deep); border-left: 3px solid var(--rust-mid); }

.contact-aside {
  display: grid;
  gap: .9rem;
}
.contact-aside-card {
  position: relative;
  padding: 1.35rem 1.25rem;
  background: #fff;
  border: 1px solid rgba(61,69,76,.12);
}
.contact-aside-card.is-person {
  background: var(--steel-dark);
  color: var(--white-off);
  border-color: transparent;
}
.contact-aside-card.is-person .eyebrow { color: var(--spark-gold); }
.contact-aside-card.is-person h3 {
  margin: 0 0 .25rem;
  color: #fff;
  font-size: 1.25rem;
}
.contact-aside-card.is-person .contact-role,
.contact-aside-card.is-person p.contact-role {
  margin: 0 0 1rem;
  color: rgba(242, 244, 245, .78);
  font-size: .92rem;
}
.contact-role {
  margin: 0 0 1rem;
  color: var(--steel-light);
  font-size: .92rem;
}
.contact-aside-links {
  display: grid;
  gap: .35rem;
}
.contact-aside-links a {
  color: var(--spark-gold);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: .92rem;
}
.contact-aside-links a:hover { color: #fff; }
.office-tag {
  display: inline-block;
  margin-bottom: .55rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--copper);
  border: 1px solid rgba(184,115,51,.35);
  padding: .2rem .45rem;
}
.office-tag.is-regional { color: var(--forest-green); border-color: rgba(61,92,78,.35); }
.contact-aside-card h3 {
  margin: 0 0 .45rem;
  font-size: 1.1rem;
  color: var(--steel-dark);
}
.contact-aside-card p {
  margin: 0 0 .65rem;
  color: var(--steel-mid);
  font-size: .92rem;
  line-height: 1.5;
}
.contact-mini-link {
  font-family: var(--font-sans);
  font-size: .9rem;
  font-weight: 600;
  color: var(--copper);
  text-decoration: none;
}
.contact-mini-link:hover { color: var(--rust-deep); }
.contact-green {
  margin: .35rem 0 0;
  font-style: italic;
  color: var(--forest-green);
  font-size: .92rem;
}

.section-maps {
  background:
    linear-gradient(180deg, #EEF1F3, var(--white-off));
  color: var(--text-on-light);
  padding-top: 3rem;
}
.maps-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.25rem;
  margin-bottom: 1.35rem;
  flex-wrap: wrap;
}
.maps-head h2 { margin: 0; }
.map-tabs {
  display: flex;
  gap: .4rem;
  background: #fff;
  border: 1px solid rgba(61,69,76,.14);
  padding: .3rem;
}
.map-tab {
  font-family: var(--font-sans);
  font-size: .82rem;
  font-weight: 600;
  padding: .55rem 1rem;
  border: 0;
  background: transparent;
  color: var(--steel-mid);
  cursor: pointer;
  transition: background .2s, color .2s;
}
.map-tab.is-active {
  background: var(--steel-dark);
  color: var(--white-off);
}
.map-stage {
  position: relative;
  aspect-ratio: 21 / 9;
  min-height: 320px;
  background: var(--steel-dark);
  border: 1px solid rgba(61,69,76,.14);
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(21,24,26,.08);
}
.map-panel { position: absolute; inset: 0; }
.map-panel iframe {
  width: 100%;
  height: 100%;
  border: 0;
  filter: grayscale(.35) contrast(1.05);
}

/* Case study */
.case-list { display: grid; gap: 2.5rem; margin-top: 2rem; }
.case-block {
  background: #fff; border: 1px solid rgba(58,65,71,.12); overflow: hidden;
}
.case-block .case-header {
  padding: 1.75rem 1.75rem 1rem;
  background: linear-gradient(115deg, rgba(184,115,51,.08), transparent);
  border-bottom: 1px solid rgba(58,65,71,.08);
}
.case-block .case-body { padding: 1.5rem 1.75rem 2rem; display: grid; gap: 1.25rem; }
.case-cols { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; }
.case-cols h4 {
  font-family: var(--font-sans); font-size: .75rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--rust-mid); margin-bottom: .5rem;
}
.case-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: .75rem;
  margin-top: 1.25rem;
}
.case-stat {
  padding: 1rem 1.1rem;
  background: #fff;
  border: 1px solid rgba(58, 65, 71, .14);
  border-left: 3px solid var(--copper);
  min-width: 0;
}
.case-stat .val {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--steel-dark);
  display: block;
  font-weight: 600;
}
.case-stat .lbl {
  font-size: .78rem;
  color: var(--steel-mid);
  margin-top: .25rem;
  display: block;
}
.case-featured-img {
  display: block;
  max-width: 720px;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid rgba(58, 65, 71, .12);
}
.case-quote {
  padding: 1.5rem;
  background: linear-gradient(135deg, #f8f6f0, #e8e4d8);
  border: 1px solid rgba(58, 65, 71, .2);
  font-family: Georgia, serif;
  max-width: 640px;
}
.case-quote-eyebrow {
  font-family: var(--font-sans);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--rust-mid);
  margin: 0 0 .75rem;
}
.case-quote-body {
  font-style: italic;
  margin: 0 0 1rem;
}
.case-quote-by {
  margin: 0;
  font-size: .9rem;
  font-family: var(--font-sans);
}

/* Thermo comparison */
.temp-compare {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.25rem 0 0; max-width: 720px;
}
.temp-box {
  padding: 1.5rem; text-align: center; border: 1px solid rgba(58,65,71,.15);
}
.temp-box.before { background: linear-gradient(160deg, rgba(181,88,31,.2), #fff); }
.temp-box.after { background: linear-gradient(160deg, rgba(76,168,94,.15), #fff); }
.temp-box .deg {
  font-family: var(--font-mono); font-size: 2rem; font-weight: 600; display: block; margin: .5rem 0;
}
.temp-box .deg-sm { font-size: 1.4rem; }
.temp-box.before .deg { color: var(--rust-mid); }
.temp-box.after .deg { color: var(--forest-green); }

/* Work masonry */
.work-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2rem;
}
.work-item { position: relative; overflow: hidden; aspect-ratio: 4/3; }
.work-item.tall { aspect-ratio: 3/4; grid-row: span 2; }
.work-item img { width: 100%; height: 100%; object-fit: cover; }
.work-item .overlay-cap {
  position: absolute; inset: auto 0 0 0; padding: 1.15rem 1.1rem 1.25rem;
  background: linear-gradient(180deg, transparent 0%, rgba(14,16,18,.55) 35%, rgba(14,16,18,.92) 100%);
  color: var(--white-off); font-size: .85rem;
}

/* Footer — cool light steel */
.site-footer {
  background:
    linear-gradient(180deg, #F7F8F9, var(--chrome-light));
  color: var(--ink);
  margin-top: 0;
  border-top: 1px solid var(--chrome-border);
}
.footer-spark {
  height: 3px;
  background: linear-gradient(90deg, var(--rust-deep), var(--rust-bright), var(--spark-gold), var(--leaf-green));
}
.footer-grid {
  display: grid; grid-template-columns: 1.3fr 1fr 1.2fr 1.2fr; gap: 2rem;
  padding: 3.5rem 0 2.5rem;
}
.footer-brand-link {
  display: inline-flex;
  align-items: center;
  gap: .85rem;
  text-decoration: none;
  color: var(--steel-dark);
  margin-bottom: 1rem;
}
.footer-brand-link:hover { color: var(--steel-dark); }
.footer-logo {
  width: auto;
  height: 56px;
  max-width: min(100%, 280px);
  object-fit: contain;
  display: block;
}
.footer-mark {
  width: 64px;
  height: 64px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}
.footer-brand-copy {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  line-height: 1.05;
}
.footer-brand-name {
  font-family: var(--font-sans);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: .04em;
}
.footer-brand-sub {
  font-family: var(--font-sans);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--steel-mid);
}
.footer-brand h2 { color: var(--steel-dark); font-size: 1.4rem; margin: .75rem 0 .4rem; }
.footer-tagline {
  color: var(--steel-dark);
  font-family: var(--font-sans);
  font-size: .95rem;
  font-weight: 500;
  line-height: 1.45;
  margin: 0;
  max-width: 28ch;
}
.footer-green {
  color: #2F7A3E;
  font-style: italic;
  margin: .55rem 0 0;
  font-size: .9rem;
}
.site-footer h3 {
  font-family: var(--font-sans); font-size: .78rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--steel-dark); margin-bottom: 1rem;
}
.footer-links li { margin-bottom: .45rem; }
.footer-links a { text-decoration: none; color: var(--steel-mid); font-size: .92rem; }
.footer-links a:hover { color: var(--copper); }
.site-footer a { color: var(--steel-mid); }
.site-footer a:hover { color: var(--copper); }
.footer-contact-person { margin-top: 1rem; font-size: .92rem; color: var(--steel-mid); }
.footer-bottom {
  border-top: 1px solid var(--chrome-border); padding: 1.1rem 0;
  font-size: .85rem; color: var(--steel-mid);
  background: rgba(201, 208, 214, .28);
}

/* Explainer */
.explainer-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-top: 2rem; align-items: center;
}
.explainer-diagram {
  margin: 0;
  aspect-ratio: 4/3;
  border: 1px solid rgba(58,65,71,.15);
  background: var(--steel-dark);
  overflow: hidden;
  position: relative;
}
.explainer-diagram img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.explainer-diagram figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: .75rem 1rem;
  font-size: .82rem;
  line-height: 1.4;
  color: var(--white-off);
  background: linear-gradient(transparent, rgba(21,24,26,.88));
}
.how-list { display: grid; gap: .85rem; }
.how-list li {
  display: grid; grid-template-columns: 28px 1fr; gap: .75rem; align-items: start;
  font-size: .95rem;
}
.how-list li span {
  width: 28px; height: 28px; border-radius: 50%; background: var(--steel-dark); color: var(--spark-gold);
  display: grid; place-items: center; font-family: var(--font-mono); font-size: .75rem; font-weight: 600;
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .75rem;
}
.stat-card {
  background: var(--steel-dark);
  color: var(--white-off);
  padding: 1rem .85rem;
  border-left: 3px solid var(--spark-gold);
  text-align: left;
}
.stat-card .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-weight: 600;
  color: var(--spark-gold);
  line-height: 1.1;
}
.stat-card .label {
  margin-top: .35rem;
  font-size: .78rem;
  line-height: 1.35;
  color: rgba(242, 244, 245, .78);
}

/* Responsive */
@media (max-width: 1100px) {
  .primary-nav a { padding: .35rem .5rem; font-size: .84rem; }
  .primary-nav .nav-cta { margin-left: .35rem; padding: .5rem .85rem; }
  .header-tag { max-width: 42ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}
@media (max-width: 1024px) {
  .causes-grid { grid-template-columns: repeat(2, 1fr); }
  .pillars-grid, .framework-track, .card-grid, .product-grid, .charts-grid, .charts-grid-3,
  .gallery-grid, .work-grid, .sector-grid, .range-grid { grid-template-columns: repeat(2, 1fr); }
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
  .conventional-grid { grid-template-columns: 1fr; }
  .benefit-bento { grid-template-columns: repeat(2, 1fr); }
  .benefit-tile.is-featured { grid-column: span 2; grid-row: span 1; min-height: 160px; }
  .framework-track::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .case-cols { grid-template-columns: 1fr; }
  .stats-row, .corrosion-metrics { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .contact-channel-strip, .contact-process { grid-template-columns: 1fr; }
  .map-stage { aspect-ratio: 16 / 10; }
  .corrosion-bento { grid-template-columns: 1fr; }
  .corrosion-breakdown { grid-template-columns: 1fr; }
  .corrosion-map-layout { grid-template-columns: 1fr; }
  .india-live-map { height: 380px; }
}
@media (max-width: 768px) {
  :root { --header-h: 56px; }

  .container { width: min(100% - 1.5rem, var(--container)); }
  .section { padding: 3rem 0; }
  .section-pillars, .section-framework { background-attachment: scroll; }

  h1 { font-size: clamp(1.85rem, 8vw, 2.6rem); }
  h2 { font-size: clamp(1.45rem, 6vw, 2rem); }
  .lead { font-size: 1rem; max-width: none; }
  .eyebrow { font-size: .68rem; letter-spacing: .12em; }

  .header-tag { display: none; }
  .header-top { padding: .35rem 0; }
  .header-top-inner {
    justify-content: center;
    gap: .75rem;
    flex-wrap: wrap;
    font-size: .72rem;
  }
  .header-top-links { gap: .75rem; }
  .nav-toggle {
    display: flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
  }
  .header-main { position: relative; }
  .header-inner { min-height: 52px; padding-block: .4rem; }
  .brand .brand-logo { height: 32px; max-width: 168px; }
  .site-header.is-scrolled .brand .brand-logo { height: 28px; }
  .primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: .5rem 1rem 1.25rem;
    border-bottom: 3px solid var(--copper);
    box-shadow: 0 16px 40px rgba(21,24,26,.14);
    max-height: min(78vh, 560px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 80;
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav a {
    padding: .95rem .65rem;
    border-bottom: 1px solid var(--chrome-mid);
    font-size: .95rem;
    min-height: 48px;
    display: flex;
    align-items: center;
  }
  .primary-nav .nav-cta {
    margin: .85rem 0 0;
    text-align: center;
    justify-content: center;
    clip-path: none;
    border-radius: 2px;
  }

  .hero {
    min-height: min(78vh, 620px);
    height: auto;
  }
  .hero-content {
    padding: 2.25rem 0 5.75rem;
    max-width: 100%;
  }
  .hero h1 { font-size: clamp(1.9rem, 9vw, 2.55rem); max-width: 14ch; }
  .hero .subhead { font-size: 1rem; }
  .hero .precision { font-size: .78rem; letter-spacing: .06em; }
  .hero-counter { display: none; }
  .hero-controls {
    left: 50%;
    right: auto;
    bottom: 1.25rem;
    transform: translateX(-50%);
    width: auto;
    max-width: calc(100% - 2rem);
    padding: 0 .25rem;
    gap: .75rem;
    justify-content: center;
  }
  .hero-arrow { width: 42px; height: 42px; flex-shrink: 0; }
  .hero-dots { flex-shrink: 0; }

  .page-hero { padding: 3.25rem 0 2.5rem; }
  .page-hero h1 { max-width: 16ch; }

  .causes-head { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .causes-grid,
  .pillars-grid, .framework-track, .card-grid, .product-grid, .charts-grid, .charts-grid-3,
  .gallery-grid, .work-grid, .sector-grid, .clients-split, .two-col, .ba-pair,
  .vision-grid, .range-grid, .benefit-bento, .explainer-grid, .temp-compare,
  .client-grid, .footer-grid, .impact-grid, .conventional-grid,
  .contact-channel-strip, .contact-process, .contact-layout, .form-row-2,
  .case-cols, .stats-row, .corrosion-metrics, .corrosion-bento,
  .corrosion-breakdown, .corrosion-map-layout { grid-template-columns: 1fr; }

  .benefit-tile.is-featured { grid-column: span 1; min-height: 140px; }
  .leadership-card { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .cause-card-media { min-height: 200px; }
  .causes-badge { align-self: flex-start; }

  .corrosion-head { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .corrosion-pulse { width: 100%; }
  .corrosion-metric { padding: 1.15rem; }
  .corrosion-metric .num { font-size: clamp(1.6rem, 8vw, 2.2rem); }
  .india-live-map { height: 300px; }
  .corrosion-map-frame { padding: .65rem; }
  .map-hint { font-size: .75rem; }
  .map-legend { gap: .5rem .85rem; font-size: .75rem; }
  .corrosion-chart-card { padding: 1rem; }
  .corrosion-chart-card canvas,
  .corrosion-breakdown canvas { max-height: 240px !important; }

  .specs-head { flex-direction: column; align-items: flex-start; gap: .75rem; }
  .spec-table { font-size: .82rem; min-width: 640px; }
  .spec-table th, .spec-table td { padding: .65rem .55rem; }
  .system-stack .stack-steps { gap: .4rem; }
  .system-stack .stack-steps li { font-size: .75rem; padding: .45rem .65rem; }

  .ba-pair { gap: 1.25rem; }
  .ba-pair-item .ba-slider,
  .ba-slider { aspect-ratio: 4 / 3; }
  .ba-label { font-size: .65rem; padding: .25rem .4rem; }
  .filter-bar,
  .filter-bar-dark {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: .4rem;
    padding-bottom: .35rem;
    margin: 1.1rem 0 1.35rem;
    scrollbar-width: thin;
  }
  .filter-btn {
    flex: 0 0 auto;
    white-space: nowrap;
    padding: .55rem .85rem;
    min-height: 40px;
  }
  .work-item .overlay-cap,
  .gallery-item .cap { font-size: .8rem; padding: .75rem; }

  .lightbox { padding: 3.5rem .75rem 4.5rem; }
  .lightbox img { max-width: 100%; max-height: 70vh; }
  .lightbox-nav { width: 2.4rem; height: 2.4rem; font-size: .95rem; }
  .lightbox-nav.prev { left: .35rem; }
  .lightbox-nav.next { right: .35rem; }
  .lightbox-cap {
    bottom: .85rem;
    font-size: .82rem;
    width: calc(100% - 1.5rem);
  }
  .lightbox-close { top: .65rem; right: .75rem; font-size: 1.75rem; }

  .contact-hero { padding: 3.25rem 0 2.25rem; }
  .contact-channel { padding: 1rem; }
  .contact-form-panel { padding: 1.25rem 1rem; }
  .map-tabs { overflow-x: auto; }
  .map-stage { aspect-ratio: 4 / 3; min-height: 240px; }
  .map-stage iframe { width: 100%; height: 100%; }

  .case-stats { grid-template-columns: 1fr 1fr; gap: .65rem; }
  .case-stat .val { font-size: 1.15rem; }
  .client-badge { min-height: 52px; padding: .85rem .9rem; font-size: .86rem; }

  .btn, .btn-primary, .btn-outline, .btn-outline-dark {
    min-height: 48px;
    padding: .85rem 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .cta-banner { padding: 3rem 0; text-align: center; }
  .cta-banner .btn { width: 100%; max-width: 320px; }

  .marquee-wrap { margin-top: 1.5rem; }
  .client-chip { font-size: .82rem; padding: .55rem .9rem; }

  .footer-grid { gap: 1.75rem; padding: 2.5rem 0 1.75rem; }
  .footer-logo { height: 48px; }
  .footer-bottom { text-align: center; padding: 1rem 0; font-size: .8rem; }

  .gallery-item:hover img,
  .product-card:hover,
  .work-item:hover img { transform: none; }
}

@media (max-width: 480px) {
  .container { width: min(100% - 1.15rem, var(--container)); }
  .section { padding: 2.5rem 0; }
  .header-top-links a:last-child { display: none; }

  .hero { min-height: 70vh; }
  .hero-content { padding: 2rem 0 5.25rem; }
  .hero h1 { font-size: 1.85rem; }
  .hero-spark-line { width: 48px; }

  .impact-grid,
  .case-stats,
  .temp-compare { grid-template-columns: 1fr; }

  .corrosion-metrics { gap: .75rem; }
  .india-live-map { height: 260px; }
  .causes-grid { gap: .75rem; }
  .cause-card-media { min-height: 180px; }

  .product-grid .product-card-media { aspect-ratio: 16 / 10; }
  .spec-table { min-width: 560px; font-size: .78rem; }

  .system-stack .stack-steps li { flex: 1 1 calc(50% - .4rem); text-align: center; }
  .contact-aside-card { padding: 1.1rem 1rem; }
  .office-maps-head { flex-direction: column; align-items: flex-start; }
}

@supports (padding: max(0px)) {
  .site-header,
  .primary-nav.is-open {
    padding-left: max(0px, env(safe-area-inset-left));
    padding-right: max(0px, env(safe-area-inset-right));
  }
  .site-footer {
    padding-bottom: max(0px, env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .framework-step,
  .hero-slide-bg, .hero-content, .marquee-track, .spark-divider {
    animation: none !important; transition: none !important;
  }
  .reveal { opacity: 1; transform: none; }
  .framework-step { opacity: 1; transform: none; }
  .hero-slide-bg { transform: none !important; transition: none !important; }
  .hero-content { opacity: 1 !important; transform: none !important; }
  .marquee-track { animation: none; flex-wrap: wrap; width: auto; justify-content: center; }
}