/* ═══════════════════════════════════════════════════════════════════
   BISWAJIT ENGINEERING — style.css
   Premium industrial / railway infrastructure corporate design.
   Navy · Steel · White · controlled amber accent.
   ═══════════════════════════════════════════════════════════════════ */

/* ── Tokens ──────────────────────────────────────────────────────── */
:root {
  /* palette (oklch) */
  --navy-950: oklch(0.21 0.035 262);
  --navy-900: oklch(0.245 0.038 262);
  --navy-850: oklch(0.28 0.04 262);
  --navy-800: oklch(0.32 0.042 262);
  --navy-700: oklch(0.39 0.04 262);

  --bg:        oklch(0.965 0.007 262);
  --surface:   oklch(1 0 0);
  --steel-bg:  oklch(0.94 0.008 262);
  --fg:        oklch(0.235 0.035 262);
  --muted:     oklch(0.5 0.022 262);
  --border:    oklch(0.89 0.012 262);

  --accent:       oklch(0.56 0.16 58);
  --accent-deep:  oklch(0.465 0.15 56);
  --accent-hover: oklch(0.41 0.15 56);
  --accent-soft:  color-mix(in oklch, var(--accent) 12%, transparent);
  --gold:         oklch(0.8 0.115 82);
  --gold-soft:    color-mix(in oklch, var(--gold) 14%, transparent);

  --wa:   oklch(0.55 0.15 152);
  --wa-deep: oklch(0.5 0.15 152);
  --ok:   oklch(0.55 0.16 152);
  --err:  oklch(0.5 0.18 27);
  --white: oklch(1 0 0);

  /* light text on dark surfaces */
  --on-dark:      oklch(0.985 0.003 262);
  --on-dark-muted: oklch(0.76 0.02 262);

  /* type */
  --font-display: 'Iowan Old Style', 'Palatino Linotype', 'Book Antiqua', Georgia, 'Times New Roman', serif;
  --font-body: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  --font-mono: 'Cascadia Code', 'SF Mono', Consolas, Menlo, monospace;

  /* scale */
  --fs-hero:   clamp(2.4rem, 5.6vw, 4.5rem);
  --fs-h1:     clamp(2.1rem, 4vw, 3rem);
  --fs-h2:     clamp(1.7rem, 3vw, 2.4rem);
  --fs-h3:     1.18rem;
  --fs-body:   1rem;
  --fs-small:  0.9rem;
  --fs-meta:   0.8125rem;

  /* spacing */
  --section-pad: clamp(4rem, 8vw, 7rem);
  --container: 1200px;
  --gutter: clamp(1.25rem, 4vw, 2rem);
  --header-h: 76px;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;

  /* elevation */
  --shadow-sm: 0 2px 6px oklch(0.2 0.03 262 / 0.08);
  --shadow-md: 0 10px 28px oklch(0.2 0.03 262 / 0.12);
  --shadow-lg: 0 24px 56px oklch(0.16 0.03 262 / 0.28);
  --glow-accent: 0 8px 28px oklch(0.56 0.16 58 / 0.45);
  --glow-accent-sm: 0 4px 16px oklch(0.56 0.16 58 / 0.35);
}

/* ── Reset & base ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html, body { overflow-x: clip; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; }
p { text-wrap: pretty; margin: 0; }
h1, h2, h3, h4 { text-wrap: balance; margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--accent-soft); color: var(--fg); }

:focus-visible {
  outline: 2px solid var(--accent-deep);
  outline-offset: 3px;
  border-radius: 2px;
}
.section-dark :focus-visible, .site-footer :focus-visible, .hero :focus-visible, .section-trust :focus-visible {
  outline-color: var(--gold);
}

/* ── Layout primitives ───────────────────────────────────────────── */
.container {
  width: min(var(--container), 100% - (var(--gutter) * 2));
  margin-inline: auto;
}
.section { padding-block: var(--section-pad); }
.section-light { background: var(--bg); }
.section-steel { background: var(--steel-bg); }
.section-dark { background: var(--navy-900); color: var(--on-dark); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 300;
  background: var(--navy-900); color: var(--on-dark);
  padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.section-head { max-width: 720px; margin-bottom: clamp(2rem, 4vw, 3.25rem); }
.section-head.row-between { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--gutter); flex-wrap: wrap; max-width: none; }
.section-lead { color: var(--muted); font-size: 1.05rem; margin-top: 0.9rem; max-width: 60ch; }
.section-dark .section-lead { color: var(--on-dark-muted); }

/* ── Type ────────────────────────────────────────────────────────── */
.h1, .h2 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.015em; line-height: 1.12; }
.h1 { font-size: var(--fs-h1); }
.h2 { font-size: var(--fs-h2); }
.h3 { font-size: var(--fs-h3); font-weight: 700; line-height: 1.35; letter-spacing: -0.01em; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin: 0 0 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::before {
  content: "";
  width: 28px; height: 2px;
  background: var(--accent);
}
.eyebrow-light { color: var(--gold); }
.eyebrow-light::before { background: var(--gold); }

/* ── Buttons ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 46px;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease,
              box-shadow 0.2s ease, transform 0.05s ease;
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent-deep);
  color: var(--white);
  border-color: var(--accent-deep);
  box-shadow: var(--glow-accent-sm);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: var(--glow-accent);
}

.btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent-deep);
  color: var(--accent-deep);
  background: var(--accent-soft);
}

.btn-lg { min-height: 54px; padding: 0.9rem 1.8rem; font-size: 0.95rem; }

.btn-ghost-light {
  background: transparent;
  color: var(--on-dark);
  border-color: color-mix(in oklch, var(--on-dark) 34%, transparent);
}
.btn-ghost-light:hover {
  border-color: var(--gold);
  color: var(--gold);
  box-shadow: 0 0 0 1px color-mix(in oklch, var(--gold) 40%, transparent);
}

.btn-whatsapp {
  background: var(--wa);
  color: var(--white);
  border-color: var(--wa);
}
.btn-whatsapp:hover {
  background: var(--wa-deep);
  border-color: var(--wa-deep);
  box-shadow: 0 6px 22px oklch(0.55 0.15 152 / 0.4);
}
.btn-whatsapp svg { width: 20px; height: 20px; }
.btn-whatsapp-dark {
  background: color-mix(in oklch, var(--wa) 16%, transparent);
  color: var(--gold);
  border-color: color-mix(in oklch, var(--wa) 45%, transparent);
}
.btn-whatsapp-dark:hover {
  background: var(--wa);
  color: var(--white);
  border-color: var(--wa);
  box-shadow: 0 6px 22px oklch(0.55 0.15 152 / 0.4);
}

.btn-file svg { width: 20px; height: 20px; }

/* ── Header ──────────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: color-mix(in oklch, var(--navy-900) 90%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in oklch, var(--on-dark) 9%, transparent);
  transition: background-color 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}
.site-header.is-scrolled {
  background: color-mix(in oklch, var(--navy-900) 97%, transparent);
  border-bottom-color: color-mix(in oklch, var(--on-dark) 14%, transparent);
  box-shadow: 0 8px 30px oklch(0.16 0.03 262 / 0.35);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  flex: none;
  background: var(--white);
  border-radius: 10px;
  padding: 7px 14px;
  box-shadow: 0 4px 16px oklch(0.16 0.03 262 / 0.28);
  line-height: 0;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.brand:hover { box-shadow: 0 6px 20px oklch(0.16 0.03 262 / 0.38); transform: translateY(-1px); }
.brand img { height: 56px; width: auto; }

.site-nav { display: flex; align-items: center; gap: clamp(0.5rem, 1.4vw, 1.4rem); }
.nav-link {
  position: relative;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in oklch, var(--on-dark) 86%, transparent);
  padding: 0.5rem 0.2rem;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--gold);
  transition: right 0.25s ease;
}
.nav-link:hover { color: var(--on-dark); }
.nav-link:hover::after { right: 0; }
.nav-link.is-active { color: var(--gold); }
.nav-link.is-active::after { right: 0; }

.header-actions { display: flex; align-items: center; gap: 0.9rem; }
.btn-call svg { width: 16px; height: 16px; }

.nav-toggle {
  display: none;
  width: 46px; height: 46px;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in oklch, var(--on-dark) 22%, transparent);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--gold); background: color-mix(in oklch, var(--on-dark) 6%, transparent); }
.nav-toggle-bar {
  width: 20px; height: 2px;
  background: var(--on-dark);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile menu ─────────────────────────────────────────────────── */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--navy-950);
  color: var(--on-dark);
  padding: calc(var(--header-h) + 1rem) var(--gutter) 2rem;
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  overflow-y: auto;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
.mobile-menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.mobile-menu-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}
.mobile-menu-close {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in oklch, var(--on-dark) 22%, transparent);
  color: var(--on-dark);
}
.mobile-menu-close svg { width: 22px; height: 22px; }
.mobile-menu-close:hover { border-color: var(--gold); color: var(--gold); }

.mobile-nav { display: flex; flex-direction: column; }
.mobile-nav-link {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--on-dark);
  padding: 0.85rem 0;
  border-bottom: 1px solid color-mix(in oklch, var(--on-dark) 10%, transparent);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.mobile-nav-link:hover { color: var(--gold); padding-left: 0.5rem; }

.mobile-menu-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.75rem;
}
.mobile-menu-actions .btn { width: 100%; }
.mobile-menu-contact {
  margin-top: auto;
  padding-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  color: var(--on-dark-muted);
}

/* ── Hero ────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: min(90svh, 840px);
  display: flex;
  align-items: center;
  color: var(--on-dark);
  padding: calc(var(--header-h) + 3rem) 0 clamp(3rem, 6vw, 5rem);
  isolation: isolate;
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: var(--slide-img, url("../images/hero-main.webp"));
  background-position: center 55%;
  background-size: cover;
  background-repeat: no-repeat;
  transition: background-image .6s ease, opacity .35s ease;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(180deg,
      oklch(0.21 0.035 262 / 0.74) 0%,
      oklch(0.21 0.035 262 / 0.52) 45%,
      oklch(0.245 0.038 262 / 0.88) 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(52rem 22rem at 82% 12%, oklch(0.56 0.16 58 / 0.14), transparent 60%),
    radial-gradient(40rem 20rem at 8% 92%, oklch(0.21 0.035 262 / 0.55), transparent 60%);
}
.hero-inner { position: relative; z-index: 2; max-width: 780px; padding-top: 1rem; }
.hero-title {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 1.4rem;
}
.hero-title span {
  display: block;
  color: var(--gold);
}
.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: 600;
  color: var(--on-dark);
  margin-bottom: 1.1rem;
}
.hero-copy {
  max-width: 62ch;
  color: var(--on-dark-muted);
  font-size: 1.02rem;
  margin-bottom: 2rem;
}
.hero-cta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.9rem;
}
.hero-call {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--on-dark-muted);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.7rem 0.2rem;
  transition: color 0.2s ease;
}
.hero-call svg { width: 16px; height: 16px; color: var(--gold); }
.hero-call:hover { color: var(--gold); }

.hero-scroll {
  z-index: 2;
  position: absolute;
  bottom: 1.6rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--on-dark-muted);
}
.hero-scroll-line {
  width: 1px;
  height: 46px;
  background: linear-gradient(180deg, var(--gold), transparent);
  animation: scroll-hint 2.2s ease-in-out infinite;
  transform-origin: top;
}
@keyframes scroll-hint {
  0% { transform: scaleY(0); }
  45% { transform: scaleY(1); }
  100% { transform: scaleY(0); opacity: 0.2; }
}

/* ── Stats ───────────────────────────────────────────────────────── */
.stats {
  background: var(--navy-900);
  color: var(--on-dark);
  border-top: 1px solid color-mix(in oklch, var(--on-dark) 8%, transparent);
  position: relative;
  z-index: 2;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.25rem, 3vw, 2rem);
  padding-block: clamp(2rem, 4vw, 3rem);
}
.stat { border-left: 1px solid color-mix(in oklch, var(--on-dark) 12%, transparent); padding-left: clamp(1rem, 2.5vw, 1.75rem); }
.stat-num {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}
.stat-label { color: var(--on-dark-muted); font-size: var(--fs-small); margin-top: 0.55rem; max-width: 26ch; }

/* ── About ───────────────────────────────────────────────────────── */
.about-split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}
.about-media { position: relative; }
.about-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border);
}
.about-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px color-mix(in oklch, var(--on-dark) 8%, transparent);
}
.about-frame img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
.about-media:hover .about-frame img { transform: scale(1.035); }
.about-badge {
  position: absolute;
  left: 1.25rem;
  bottom: 1.25rem;
  background: color-mix(in oklch, var(--navy-900) 82%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--on-dark);
  border: 1px solid color-mix(in oklch, var(--gold) 40%, transparent);
  border-radius: var(--radius);
  padding: 0.8rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  box-shadow: var(--shadow-md);
}
.about-badge-title { font-weight: 700; font-size: 0.9rem; letter-spacing: 0.02em; color: var(--gold); }
.about-badge-sub { font-family: var(--font-mono); font-size: 0.72rem; color: var(--on-dark-muted); letter-spacing: 0.04em; }

.about-lead { font-size: 1.1rem; color: var(--muted); margin-bottom: 1rem; }
.about-content > p:not(.eyebrow):not(.about-lead) { color: var(--muted); margin-bottom: 1rem; }

.about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1.5rem;
  margin: 1.75rem 0;
  border-top: 1px solid var(--border);
}
.fact { padding: 0.9rem 0.4rem 0.9rem 0; border-bottom: 1px solid var(--border); }
.fact dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.2rem;
}
.fact dd { margin: 0; font-weight: 700; font-size: 0.95rem; }

.about-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.4rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in oklch, var(--accent) 40%, var(--border));
}
.feature-icon {
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: var(--radius);
  background: var(--steel-bg);
  color: var(--fg);
  margin-bottom: 1rem;
  transition: background-color 0.25s ease, color 0.25s ease;
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-card:hover .feature-icon { background: var(--accent-soft); color: var(--accent-deep); }
.feature-card h3 { margin-bottom: 0.45rem; }
.feature-card p { color: var(--muted); font-size: var(--fs-small); }

/* ── Capabilities ────────────────────────────────────────────────── */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.cap-card {
  position: relative;
  background: color-mix(in oklch, var(--on-dark) 5%, transparent);
  border: 1px solid color-mix(in oklch, var(--on-dark) 12%, transparent);
  border-radius: var(--radius-lg);
  padding: 1.8rem 1.6rem;
  overflow: hidden;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease, background-color 0.28s ease;
}
.cap-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent 70%);
  opacity: 0;
  transition: opacity 0.28s ease;
}
.cap-card:hover {
  transform: translateY(-5px);
  border-color: color-mix(in oklch, var(--gold) 42%, transparent);
  background: color-mix(in oklch, var(--on-dark) 7%, transparent);
  box-shadow: 0 22px 48px oklch(0.16 0.03 262 / 0.45);
}
.cap-card:hover::before { opacity: 1; }
.cap-index {
  position: absolute;
  top: 1.25rem;
  right: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--on-dark-muted);
  letter-spacing: 0.1em;
}
.cap-icon {
  display: grid;
  place-items: center;
  width: 52px; height: 52px;
  border-radius: var(--radius);
  border: 1px solid color-mix(in oklch, var(--gold) 34%, transparent);
  color: var(--gold);
  margin-bottom: 1.25rem;
  background: color-mix(in oklch, var(--gold) 8%, transparent);
}
.cap-icon svg { width: 24px; height: 24px; }
.cap-card h3 { color: var(--on-dark); margin-bottom: 0.55rem; }
.cap-card p { color: var(--on-dark-muted); font-size: var(--fs-small); }

/* ── Projects ────────────────────────────────────────────────────── */
.section-note { color: var(--muted); font-size: var(--fs-small); margin-top: 0.5rem; }
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in oklch, var(--accent) 38%, var(--border));
}
.project-trigger {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--navy-800);
}
.project-trigger img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.7s ease;
}
.project-card:hover .project-trigger img { transform: scale(1.06); }
.project-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, transparent 40%, oklch(0.16 0.03 262 / 0.55));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.project-card:hover .project-overlay, .project-trigger:focus-visible .project-overlay { opacity: 1; }
.project-zoom {
  width: 52px; height: 52px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gold);
  color: var(--navy-950);
  font-size: 1.7rem;
  font-weight: 300;
  line-height: 1;
  transform: scale(0.7);
  transition: transform 0.3s ease;
}
.project-card:hover .project-zoom { transform: scale(1); }
.project-body { padding: 1.1rem 1.3rem 1.3rem; }
.project-body h3 { font-size: 1.05rem; }
.project-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 0.35rem;
}

/* ── Ongoing ─────────────────────────────────────────────────────── */
.ongoing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}
.ongoing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.ongoing-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.ongoing-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.ongoing-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s ease; }
.ongoing-card:hover .ongoing-media img { transform: scale(1.05); }
.ongoing-status {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: color-mix(in oklch, var(--navy-950) 78%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--on-dark);
  border: 1px solid color-mix(in oklch, var(--gold) 40%, transparent);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
}
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--gold);
  animation: pulse-dot 1.8s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.ongoing-body { padding: 1.4rem 1.5rem 1.6rem; }
.ongoing-body p { color: var(--muted); font-size: var(--fs-small); margin: 0.5rem 0 1.1rem; }
.ongoing-spec {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 1rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}
.spec-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 0.15rem;
}
.spec-value { font-weight: 700; font-size: 0.92rem; }

/* ── Infrastructure ──────────────────────────────────────────────── */
.infra-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: start;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}
.infra-media { position: relative; }
.infra-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid color-mix(in oklch, var(--on-dark) 14%, transparent);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3 / 4.2;
}
.infra-frame img { width: 100%; height: 100%; object-fit: cover; }
.btn-factory {
  position: absolute;
  left: 1.25rem;
  bottom: 1.25rem;
  background: color-mix(in oklch, var(--navy-950) 72%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid color-mix(in oklch, var(--gold) 45%, transparent);
  color: var(--gold);
  box-shadow: var(--shadow-md);
}
.btn-factory:hover {
  background: var(--gold);
  color: var(--navy-950);
  box-shadow: var(--glow-accent);
}
.infra-title { color: var(--on-dark); margin-bottom: 1.2rem; }
.zone-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem 1.5rem;
}
.zone {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  color: var(--on-dark-muted);
  font-size: 0.9rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid color-mix(in oklch, var(--on-dark) 9%, transparent);
  transition: color 0.2s ease;
}
.zone:hover { color: var(--on-dark); }
.zone-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--on-dark-muted);
  flex: none;
  letter-spacing: 0.08em;
}
.infra-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.1rem;
}
.infra-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid color-mix(in oklch, var(--on-dark) 12%, transparent);
}
.infra-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s ease; }
.infra-item:hover img { transform: scale(1.07); }
.infra-item figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 1.6rem 0.85rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--on-dark);
  background: linear-gradient(180deg, transparent, oklch(0.16 0.03 262 / 0.85));
}

/* ── Why choose us ───────────────────────────────────────────────── */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.why-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.5rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in oklch, var(--accent) 38%, var(--border));
}
.why-icon {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: var(--radius);
  background: var(--steel-bg);
  color: var(--fg);
  margin-bottom: 0.95rem;
  transition: background-color 0.25s ease, color 0.25s ease;
}
.why-icon svg { width: 22px; height: 22px; }
.why-card:hover .why-icon { background: var(--accent-soft); color: var(--accent-deep); }
.why-card h3 { margin-bottom: 0.45rem; }
.why-card p { color: var(--muted); font-size: var(--fs-small); }

/* ── Team ────────────────────────────────────────────────────────── */
.team-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem;
}
.team-card {
  flex: 0 1 262px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.team-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.team-media { aspect-ratio: 4 / 5; overflow: hidden; }
.team-media img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform 0.7s ease; }
.team-card:hover .team-media img { transform: scale(1.05); }
.team-body {
  min-height: 78px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0.95rem 1.1rem;
  border-top: 1px solid var(--border);
}
.team-body .team-name { font-size: 1.05rem; font-weight: 700; line-height: 1.3; color: var(--fg); }
.team-role {
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.team-role-only {
  margin-top: 0;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  color: var(--fg);
}

/* ── Gallery ─────────────────────────────────────────────────────── */
.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
}
.gallery-filter {
  min-height: 44px;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  border: 1px solid color-mix(in oklch, var(--on-dark) 20%, transparent);
  color: var(--on-dark-muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease;
}
.gallery-filter:hover {
  color: var(--on-dark);
  border-color: color-mix(in oklch, var(--gold) 50%, transparent);
}
.gallery-filter.is-active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--navy-950);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}
.gallery-item {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid color-mix(in oklch, var(--on-dark) 12%, transparent);
  padding: 0;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.gallery-item:hover img, .gallery-item:focus-visible img { transform: scale(1.07); }
.gallery-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, oklch(0.16 0.03 262 / 0.4));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.gallery-item:hover::after { opacity: 1; }
.gallery-item.is-hidden { display: none; }

/* ── Trust ───────────────────────────────────────────────────────── */
.section-trust { background: var(--navy-950); color: var(--on-dark); position: relative; }
.section-trust::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(46rem 20rem at 50% 0%, oklch(0.56 0.16 58 / 0.1), transparent 65%);
  pointer-events: none;
}
.trust-panel {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  border: 1px solid color-mix(in oklch, var(--gold) 30%, transparent);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 3rem);
  background: color-mix(in oklch, var(--on-dark) 4%, transparent);
}
.trust-seal {
  width: 76px; height: 76px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid color-mix(in oklch, var(--gold) 45%, transparent);
  color: var(--gold);
  background: color-mix(in oklch, var(--gold) 9%, transparent);
  box-shadow: 0 0 0 6px color-mix(in oklch, var(--gold) 6%, transparent);
}
.trust-seal svg { width: 34px; height: 34px; }
.trust-copy .h2 { margin-bottom: 1.25rem; }
.trust-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1.75rem;
  border-top: 1px solid color-mix(in oklch, var(--on-dark) 12%, transparent);
}
.fact-dark { border-bottom-color: color-mix(in oklch, var(--on-dark) 12%, transparent); }
.fact-dark dt { color: var(--on-dark-muted); }
.fact-dark dd { color: var(--on-dark); }
.fact-wide { grid-column: 1 / -1; }
.trust-action { display: flex; flex-direction: column; align-items: flex-start; }

/* ── Contact ─────────────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  box-shadow: var(--shadow-sm);
}
.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.field { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 1rem; }
.field label { font-size: 0.8125rem; font-weight: 600; color: var(--fg); }
.req { color: var(--accent-deep); }
.input, .textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--fg);
  font: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.textarea { min-height: 112px; resize: vertical; line-height: 1.5; }
.input::placeholder, .textarea::placeholder { color: oklch(0.6 0.02 262); }
.input:hover, .textarea:hover { border-color: oklch(0.72 0.02 262); }
.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent-deep);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.input.is-invalid, .textarea.is-invalid {
  border-color: var(--err);
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--err) 14%, transparent);
}
.field-error {
  min-height: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--err);
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.field-error.is-visible { opacity: 1; transform: translateY(0); }
.hp-field {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}
.btn-submit { width: 100%; margin-top: 0.5rem; }
.form-status {
  min-height: 1.2rem;
  margin-top: 0.9rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-align: center;
}
.form-status.is-success { color: var(--ok); }
.form-status.is-error { color: var(--err); }

.contact-info { display: flex; flex-direction: column; gap: 1rem; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  transition: border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}
.contact-card-plain { cursor: default; }
a.contact-card:hover {
  border-color: var(--accent-deep);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}
.contact-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: var(--radius);
  background: var(--steel-bg);
  color: var(--fg);
  transition: background-color 0.22s ease, color 0.22s ease;
}
.contact-icon svg { width: 21px; height: 21px; }
a.contact-card:hover .contact-icon { background: var(--accent-soft); color: var(--accent-deep); }
.contact-card-body { display: flex; flex-direction: column; gap: 0.1rem; min-width: 0; }
.contact-card-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.contact-card-value { font-weight: 700; font-size: 0.95rem; word-break: break-word; }

/* ── Footer ──────────────────────────────────────────────────────── */
.site-footer {
  position: relative;
  background: var(--navy-950);
  color: var(--on-dark-muted);
  padding-top: clamp(3.5rem, 7vw, 5.5rem);
  overflow: hidden;
  isolation: isolate;
}
.footer-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: url("../images/footer-bg.webp") center 30% / cover no-repeat;
}
.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg,
    oklch(0.21 0.035 262 / 0.93) 0%,
    oklch(0.21 0.035 262 / 0.97) 100%);
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: clamp(2rem, 4vw, 3rem);
  padding-bottom: clamp(2.5rem, 5vw, 3.5rem);
}
.footer-brand .brand img { height: 44px; }
.footer-tagline { margin: 1rem 0 1.4rem; max-width: 30ch; font-size: 0.95rem; }
.footer-col { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.5rem;
}
.footer-heading-sub { margin-top: 0.75rem; }
.footer-col a { color: var(--on-dark-muted); font-size: 0.9rem; transition: color 0.2s ease; padding: 0.15rem 0; }
.footer-col a:hover { color: var(--gold); }
.footer-meta { font-family: var(--font-mono); font-size: 0.8rem; color: var(--on-dark-muted); }
.footer-addr { font-size: 0.9rem; color: var(--on-dark-muted); line-height: 1.6; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid color-mix(in oklch, var(--on-dark) 12%, transparent);
  padding-block: 1.4rem;
  font-size: 0.8rem;
}
.footer-bottom-tag { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; }
.footer-credit-link {
  color: var(--gold);
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
}
.footer-credit-link:hover {
  color: var(--on-dark);
  text-decoration-color: color-mix(in oklch, var(--gold) 70%, transparent);
}

/* ── Floating WhatsApp ───────────────────────────────────────────── */
.wa-float {
  position: fixed;
  right: 1.4rem;
  bottom: 1.4rem;
  z-index: 80;
  width: 58px; height: 58px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--wa);
  color: var(--white);
  box-shadow: 0 10px 28px oklch(0.55 0.15 152 / 0.45);
  transition: transform 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease;
}
.wa-float svg { width: 28px; height: 28px; }
.wa-float:hover {
  transform: translateY(-4px) scale(1.05);
  background: var(--wa-deep);
  box-shadow: 0 16px 36px oklch(0.5 0.15 152 / 0.55);
}
.wa-float::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid color-mix(in oklch, var(--wa) 55%, transparent);
  animation: wa-pulse 2.4s ease-out infinite;
}
@keyframes wa-pulse {
  0% { transform: scale(0.85); opacity: 0.9; }
  70% { transform: scale(1.25); opacity: 0; }
  100% { opacity: 0; }
}

/* ── Back to top ─────────────────────────────────────────────────── */
.to-top {
  position: fixed;
  right: 1.4rem;
  bottom: 5.5rem;
  z-index: 79;
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: color-mix(in oklch, var(--navy-800) 78%, transparent);
  border: 1px solid color-mix(in oklch, var(--gold) 45%, transparent);
  color: var(--gold);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s,
              background-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}
.to-top svg { width: 20px; height: 20px; }
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover {
  background: var(--gold);
  color: var(--navy-950);
  box-shadow: var(--glow-accent-sm);
}

/* ── Mobile action bar ───────────────────────────────────────────── */
.mobile-bar {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 85;
  grid-template-columns: 1fr 1fr;
  box-shadow: 0 -6px 22px oklch(0.16 0.03 262 / 0.28);
}
.mobile-bar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 58px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--navy-800);
}
.mobile-bar-btn svg { width: 19px; height: 19px; }
.mobile-bar-btn:active { opacity: 0.85; }
.mobile-bar-wa { background: var(--wa); }

/* ── Lightbox ────────────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: oklch(0.14 0.025 262 / 0.96);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s ease, visibility 0.28s;
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox-stage {
  max-width: min(1120px, 92vw);
  max-height: 88svh;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 0;
  padding: 2rem 3rem;
}
.lightbox-img {
  max-width: 100%;
  max-height: calc(88svh - 5rem);
  width: auto;
  height: auto;
  margin-inline: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  object-fit: contain;
}
.lightbox-caption {
  text-align: center;
  color: var(--on-dark);
  font-size: 0.95rem;
  min-height: 1.4rem;
}
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute;
  display: grid;
  place-items: center;
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 1px solid color-mix(in oklch, var(--on-dark) 24%, transparent);
  color: var(--on-dark);
  background: color-mix(in oklch, var(--navy-800) 40%, transparent);
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}
.lightbox-close svg, .lightbox-prev svg, .lightbox-next svg { width: 22px; height: 22px; }
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: color-mix(in oklch, var(--navy-800) 70%, transparent);
}
.lightbox-close { top: 1.25rem; right: 1.25rem; }
.lightbox-prev { left: 1.25rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 1.25rem; top: 50%; transform: translateY(-50%); }

/* ── Reveal animation ────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: translateY(0); }

/* ── Reduced motion ──────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 1160px) {
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1024px) {
  .site-nav { display: none; }
  .nav-toggle { display: flex; }
  .cap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .project-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gallery-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .infra-grid { grid-template-columns: 1fr; }
  .infra-frame { aspect-ratio: auto; height: min(62vh, 460px); background: var(--navy-800); }
  .infra-frame img { object-fit: contain; object-position: top center; }
  .infra-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: 1fr; }
  .trust-panel { grid-template-columns: 1fr; }
  .trust-action { align-items: flex-start; }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-cta .btn-ghost-light, .hero-cta .hero-call { display: inline-flex; }
}

@media (max-width: 768px) {
  .about-split { grid-template-columns: 1fr; }
  .about-media { max-width: 560px; }
  .why-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ongoing-grid { grid-template-columns: 1fr; }
  .zone-grid { grid-template-columns: 1fr; }
  .section-head.row-between { align-items: flex-start; flex-direction: column; gap: 0.5rem; }
  .mobile-bar { display: grid; }
  body { padding-bottom: calc(58px + env(safe-area-inset-bottom, 0px)); }
  .wa-float { display: none; }
  .to-top { right: 1rem; bottom: calc(58px + 1rem); width: 44px; height: 44px; }
  .lightbox-stage { padding: 3.5rem 1rem 1.5rem; }
  .lightbox-prev { left: 0.75rem; }
  .lightbox-next { right: 0.75rem; }
  .lightbox-close { top: 0.75rem; right: 0.75rem; }
}

@media (max-width: 600px) {
  .cap-grid, .project-grid, .why-grid, .feature-grid { grid-template-columns: 1fr; }
  .team-grid { gap: 0.9rem; }
  .gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.65rem; }
  .header-actions .btn-call { display: none; }
  .stats-grid { gap: 1rem; }
  .stat { padding-left: 0.9rem; }
  .stat-num { font-size: 2.2rem; }
  .form-row { grid-template-columns: 1fr; }
  .trust-facts { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .about-facts { grid-template-columns: 1fr; }
  .brand { padding: 5px 10px; border-radius: 8px; }
  .brand img { height: 50px; }
  :root { --header-h: 64px; }
  .hero { min-height: min(94svh, 780px); padding-top: calc(var(--header-h) + 2.25rem); }
  .hero-media { background-image: var(--slide-img-mobile, var(--slide-img, url("../images/hero-mobile.webp"))); background-position: center 42%; }
  .hero-title { line-height: 1.12; letter-spacing: -0.01em; }
  .hero-inner { padding-top: 0.25rem; }
  .hero-copy { margin-bottom: 1.6rem; }
  .hero-cta { flex-direction: column; align-items: stretch; gap: 0.75rem; }
  .hero-cta .btn, .hero-cta .hero-call { width: 100%; justify-content: center; }
  .infra-strip { grid-template-columns: 1fr; }
  .mobile-menu-actions { grid-template-columns: 1fr; }
  .mobile-menu-actions .btn-whatsapp { order: -1; }
}

@media (max-width: 400px) {
  .gallery-filters { gap: 0.45rem; }
  .gallery-filter { padding: 0.5rem 0.9rem; font-size: 0.72rem; }
  .hero-title { font-size: 2.3rem; }
  .team-role-only { font-size: 0.85rem; }
  .section { padding-block: 3.5rem; }
}

@media (max-width: 480px) {
  .team-card { flex-basis: 100%; max-width: 330px; }
}

@media (max-width: 360px) {
  .hero-title { font-size: 2.1rem; }
}
/* Projects dropdown */
.nav-dropdown { position: relative; display:flex; align-items:center; }
.nav-dropdown-toggle { background:none; border:0; cursor:pointer; font:inherit; }
.nav-chevron { margin-left:.25rem; font-size:.9em; transition:transform .2s ease; }
.nav-dropdown:hover .nav-chevron, .nav-dropdown:focus-within .nav-chevron { transform:rotate(180deg); }
.nav-dropdown-menu { position:absolute; top:calc(100% + .65rem); left:50%; transform:translate(-50%,8px); min-width:230px; padding:.45rem; border:1px solid rgba(255,255,255,.12); border-radius:12px; background:rgba(7,19,38,.98); box-shadow:0 20px 50px rgba(0,0,0,.28); opacity:0; visibility:hidden; transition:.2s ease; z-index:100; }
.nav-dropdown:hover .nav-dropdown-menu, .nav-dropdown:focus-within .nav-dropdown-menu { opacity:1; visibility:visible; transform:translate(-50%,0); }
.nav-dropdown-menu a { display:block; color:#fff; padding:.72rem .85rem; border-radius:8px; font-size:.88rem; white-space:nowrap; }
.nav-dropdown-menu a:hover { background:rgba(255,255,255,.08); color:var(--gold); }
.mobile-nav-parent { width:100%; border:0; background:none; text-align:left; display:flex; justify-content:space-between; align-items:center; }
.mobile-nav-submenu { padding:.2rem 0 .45rem 1rem; }
.mobile-nav-sub { font-size:.92rem; opacity:.9; }
/* Hero controls */
.hero-arrow { position:absolute; top:50%; transform:translateY(-50%); z-index:4; width:46px; height:46px; border-radius:50%; border:1px solid rgba(255,255,255,.35); background:rgba(5,15,30,.35); color:#fff; display:grid; place-items:center; font-size:2rem; line-height:1; cursor:pointer; backdrop-filter:blur(6px); transition:.2s ease; }
.hero-arrow:hover { background:rgba(194,65,12,.85); border-color:transparent; }
.hero-arrow-prev { left:clamp(12px,2vw,34px); }
.hero-arrow-next { right:clamp(12px,2vw,34px); }
@media(max-width:768px){ .hero-arrow{width:38px;height:38px;font-size:1.6rem;top:auto;bottom:72px;} .hero-arrow-prev{left:18px}.hero-arrow-next{right:18px} }

/* FINAL header refinements */
.site-nav{flex-wrap:nowrap;white-space:nowrap;gap:clamp(.45rem,1vw,1rem)}
.nav-dropdown,.nav-dropdown-toggle{white-space:nowrap}
.nav-dropdown-toggle{display:inline-flex;align-items:center;gap:.22rem}
.header-actions .btn-call{padding:.72rem 1rem;white-space:nowrap;min-width:auto}
@media (min-width:1025px) and (max-width:1280px){.nav-link{font-size:.75rem;letter-spacing:.055em}.brand img{height:50px}.brand{padding:6px 10px}.header-inner{gap:.65rem}}

/* FINAL UX PATCH */
.mobile-nav-submenu{display:grid!important;grid-template-columns:1fr;gap:.15rem;padding:.2rem 0 .5rem .9rem!important}
.mobile-nav-submenu[hidden]{display:grid!important}
.mobile-nav-sub{display:block!important;font-size:.9rem!important;line-height:1.35;padding:.55rem .7rem!important;border-left:2px solid rgba(229,170,65,.45);white-space:normal}
.clients-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:1rem;margin-top:2rem}
.client-logo-card{min-height:130px;background:#fff;border:1px solid #dfe4ea;border-radius:12px;display:flex;align-items:center;justify-content:center;padding:1rem;transition:.2s ease;text-decoration:none;color:var(--navy)}
.client-logo-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(10,24,45,.09)}
.client-logo-card img{width:100%;height:90px;object-fit:contain}
.career-grid{display:grid;gap:1.25rem}
.career-card{background:#fff;border:1px solid #dfe4ea;border-radius:16px;padding:1.5rem;box-shadow:0 8px 26px rgba(10,24,45,.06)}
.career-card-head{display:flex;gap:1rem;align-items:flex-start;justify-content:space-between}.career-meta{display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;margin:1rem 0;color:#586678}.career-desc{max-width:900px}.career-apply{margin-top:1.2rem}.career-apply summary{display:inline-flex;cursor:pointer;list-style:none}.career-form{margin-top:1.2rem;padding-top:1.2rem;border-top:1px solid #e2e7ed}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-bottom:1rem}.field.is-full{grid-column:1/-1}.field label{display:block;font-weight:700;margin-bottom:.4rem}.field small{display:block;margin-top:.35rem;color:#687586}.form-alert{padding:1rem;border-radius:10px;margin-bottom:1rem}.form-alert.is-success{background:#e9f7ef;color:#146c43}.form-alert.is-error{background:#fff0ef;color:#a02a20}
@media(max-width:1100px){.clients-grid{grid-template-columns:repeat(4,1fr)}}@media(max-width:700px){.clients-grid{grid-template-columns:repeat(2,1fr)}.client-logo-card{min-height:105px}.client-logo-card img{height:70px}.form-grid{grid-template-columns:1fr}.field.is-full{grid-column:auto}.career-card{padding:1rem}}