:root {
  --blue: #2c4f8f;
  --blue-dark: #1d3563;
  --blue-deep: #14264a;
  --sky: #2f7fc1;
  --sky-light: #e8f1fa;
  --ink: #1c2530;
  --text: #33404d;
  --muted: #667684;
  --line: #dfe5ec;
  --bg: #ffffff;
  --bg-alt: #f4f7fa;
  --radius: 14px;
  --shadow: 0 8px 28px rgba(20, 38, 74, .09);
  --font-display: "Manrope", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --nav-h: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font-body); color: var(--text); background: var(--bg); line-height: 1.65; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--ink); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); font-weight: 800; }
h3 { font-size: 1.25rem; font-weight: 700; }
h4 { font-size: 1.05rem; font-weight: 700; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em 1.2em; padding: 0; }
.wrap { width: min(1140px, 100% - 2.5rem); margin-inline: auto; }
.section { padding: clamp(3rem, 7vw, 5.5rem) 0; }
.section-alt { background: var(--bg-alt); }
.eyebrow { font-family: var(--font-display); font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--sky); margin: 0 0 .6rem; }
.lead { font-size: 1.12rem; color: var(--text); max-width: 68ch; }
.prose { max-width: 72ch; }
.prose p { font-size: 1.03rem; }
.center { text-align: center; }
.center .lead, .center .prose { margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .8rem 1.4rem; border-radius: 999px; background: var(--blue); color: #fff; font-family: var(--font-display); font-weight: 700; font-size: .95rem; text-decoration: none; border: 2px solid var(--blue); transition: background .15s, transform .15s; }
.btn:hover { background: var(--blue-dark); border-color: var(--blue-dark); transform: translateY(-1px); }
.btn-light { background: #fff; color: var(--blue); border-color: #fff; }
.btn-light:hover { background: var(--sky-light); border-color: var(--sky-light); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; transform: none; }
.btn-outline { background: transparent; color: var(--blue); }
.btn-outline:hover { background: var(--sky-light); }
.btn-sm { padding: .5rem 1rem; font-size: .85rem; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.96); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav-inner { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.logo { display: flex; flex-direction: column; align-items: flex-start; gap: 1px; text-decoration: none; }
.logo img { height: 38px; width: auto; }
.tagline { font-family: var(--font-display); font-size: .62rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; color: var(--blue); padding-left: 2px; }
.menu { display: flex; align-items: center; gap: 1.6rem; list-style: none; margin: 0; padding: 0; }
.menu a { font-family: var(--font-display); font-weight: 600; font-size: .95rem; color: var(--ink); text-decoration: none; padding: .4rem 0; border-bottom: 2px solid transparent; }
.menu a:hover, .menu a.active { color: var(--blue); border-bottom-color: var(--blue); }
.menu .btn { color: #fff; border-bottom: 2px solid var(--blue); padding: .5rem 1.1rem; }
.lang-switch { font-family: var(--font-display); font-weight: 700; font-size: .82rem; letter-spacing: .06em; color: var(--muted); text-decoration: none; border: 1px solid var(--line); border-radius: 999px; padding: .35rem .8rem; white-space: nowrap; }
.lang-switch:hover { color: var(--blue); border-color: var(--blue); }
.nav-right { display: flex; align-items: center; gap: 1rem; }
.burger { display: none; width: 44px; height: 44px; border: 0; background: transparent; cursor: pointer; padding: 10px; }
.burger span { display: block; height: 2px; background: var(--ink); margin: 5px 0; transition: transform .2s, opacity .2s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero { position: relative; color: #fff; min-height: min(78vh, 680px); display: flex; align-items: flex-end; background: var(--blue-deep); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,38,74,.25) 0%, rgba(20,38,74,.55) 55%, rgba(20,38,74,.9) 100%); }
.hero .wrap { position: relative; z-index: 1; padding: clamp(3rem, 8vw, 6rem) 0 clamp(2.5rem, 6vw, 4rem); }
.hero h1 { color: #fff; max-width: 18ch; text-shadow: 0 2px 12px rgba(0,0,0,.25); }
.hero .eyebrow { color: #9fd0ff; }
.hero p.lead { color: #e2ebf5; max-width: 56ch; font-size: clamp(1rem, 1.6vw, 1.2rem); }
.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.5rem; }
.hero-sub { min-height: 420px; }
.hero-sub .wrap { padding-top: 4rem; }
.hero-sub h1 { font-size: clamp(1.9rem, 4vw, 2.9rem); }

/* Stats band */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-top: -2.5rem; position: relative; z-index: 2; box-shadow: var(--shadow); }
.stats li { list-style: none; background: #fff; padding: 1.3rem 1.4rem; }
.stats .num { display: block; font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: var(--blue); line-height: 1; }
.stats .lbl { font-size: .88rem; color: var(--muted); display: block; margin-top: .35rem; }

/* Grids and cards */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.6rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem; box-shadow: var(--shadow); }
.card h3 { margin-top: .2rem; }
.card p:last-child { margin-bottom: 0; }
.card-img { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.card-img img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.card-img .card-body { padding: 1.5rem 1.6rem 1.6rem; flex: 1; }
.card-link { text-decoration: none; color: inherit; transition: transform .15s, box-shadow .15s; }
.card-link:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(20,38,74,.14); }
.more { font-family: var(--font-display); font-weight: 700; color: var(--blue); text-decoration: none; display: inline-block; margin-top: .6rem; }
.more::after { content: " \2192"; }
.icon { width: 52px; height: 52px; border-radius: 12px; background: var(--sky-light); color: var(--blue); display: grid; place-items: center; margin-bottom: 1rem; }
.icon svg { width: 28px; height: 28px; }
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 3rem; align-items: center; }
.split img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; }

/* Sub navigation for long pages */
.subnav { position: sticky; top: var(--nav-h); z-index: 90; background: #fff; border-bottom: 1px solid var(--line); }
.subnav ul { display: flex; gap: .2rem; list-style: none; margin: 0; padding: 0; overflow-x: auto; scrollbar-width: none; }
.subnav ul::-webkit-scrollbar { display: none; }
.subnav a { display: block; padding: .9rem 1rem; font-family: var(--font-display); font-weight: 600; font-size: .9rem; color: var(--muted); text-decoration: none; white-space: nowrap; border-bottom: 3px solid transparent; }
.subnav a:hover, .subnav a.active { color: var(--blue); border-bottom-color: var(--blue); }
[id] { scroll-margin-top: calc(var(--nav-h) + 60px); }

/* Project blocks */
.proj { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: start; padding: 2.5rem 0; border-top: 1px solid var(--line); }
.proj:first-of-type { border-top: 0; }
.proj h3 { font-size: 1.5rem; }
.specs { display: grid; grid-template-columns: auto 1fr; gap: .3rem 1rem; margin: 1rem 0 1.2rem; padding: 1rem 1.2rem; background: var(--bg-alt); border-radius: 10px; font-size: .93rem; }
.specs dt { font-weight: 600; color: var(--ink); }
.specs dd { margin: 0; color: var(--text); }
.gallery { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
.gallery img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 10px; }
.gallery-wide { grid-template-columns: 1fr; }
.gallery-wide img { aspect-ratio: 661 / 179; }
.gallery img.big { grid-column: 1 / -1; aspect-ratio: 1; }

/* Equipment */
.equip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; }
.equip .card-img img { aspect-ratio: 3 / 2; }
.equip .card-body p { font-size: .95rem; color: var(--text); }
.doc { display: inline-flex; align-items: center; gap: .45rem; font-size: .88rem; font-weight: 600; color: var(--blue); text-decoration: none; margin-top: .5rem; }
.doc::before { content: ""; width: 16px; height: 16px; background: currentColor; -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'/%3E%3Cpath d='M14 2v6h6M12 18v-6M9 15l3 3 3-3'/%3E%3C/svg%3E") center/contain no-repeat; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z'/%3E%3Cpath d='M14 2v6h6M12 18v-6M9 15l3 3 3-3'/%3E%3C/svg%3E") center/contain no-repeat; }
.doc:hover { text-decoration: underline; }
.doc-row { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; margin-top: 1rem; }
.doc-row .doc { margin: 0; padding: .7rem 1rem; border: 1px solid var(--line); border-radius: 10px; background: #fff; }

/* Accordion (representative works) */
.acc { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; overflow: hidden; }
.acc details { border-top: 1px solid var(--line); }
.acc details:first-child { border-top: 0; }
.acc summary { list-style: none; cursor: pointer; padding: 1.1rem 1.4rem; font-family: var(--font-display); font-weight: 700; color: var(--ink); display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.acc summary::-webkit-details-marker { display: none; }
.acc summary::after { content: "+"; font-size: 1.4rem; color: var(--blue); line-height: 1; flex: none; }
.acc details[open] summary::after { content: "\2212"; }
.acc details[open] summary { background: var(--sky-light); }
.acc .acc-body { padding: .4rem 1.4rem 1.3rem; }
.acc ul { columns: 2; column-gap: 2.5rem; list-style: none; margin: 0; padding: 0; }
.acc li { break-inside: avoid; padding: .3rem 0 .3rem 1.1rem; position: relative; font-size: .95rem; }
.acc li::before { content: ""; position: absolute; left: 0; top: .78em; width: 6px; height: 6px; border-radius: 50%; background: var(--sky); }
.count { font-size: .8rem; font-weight: 600; color: var(--muted); margin-left: auto; }

/* Values */
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }

/* Contact / footer */
.contact { background: var(--blue-deep); color: #d9e3ef; }
.contact h2, .contact h3 { color: #fff; }
.contact .eyebrow { color: #9fd0ff; }
.contact a { color: #fff; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 3rem; align-items: start; }
.contact-list { list-style: none; margin: 1.2rem 0 0; padding: 0; display: grid; gap: .9rem; }
.contact-list li { display: flex; gap: .8rem; align-items: flex-start; }
.contact-list svg { width: 22px; height: 22px; flex: none; color: #9fd0ff; margin-top: .15rem; }
.map { border-radius: var(--radius); overflow: hidden; border: 1px solid rgba(255,255,255,.15); background: #0f1d38; }
.map iframe { width: 100%; height: 340px; border: 0; display: block; }
.footer { background: #0e1a33; color: #9fb0c6; font-size: .86rem; padding: 1.4rem 0; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .6rem 1.5rem; align-items: center; }
.footer a { color: #d9e3ef; text-decoration: none; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }

/* Integrity page */
.cta-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); }
.cta-box .btn { margin-top: .8rem; }

/* Responsive */
@media (max-width: 1000px) {
  .grid-3, .equip, .values { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .split, .proj, .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .acc ul { columns: 1; }
}
@media (max-width: 860px) {
  .burger { display: block; }
  .menu { position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); padding: .5rem 0 1rem; display: none; }
  .menu.open { display: flex; }
  .menu li { list-style: none; }
  .menu a { display: block; padding: .8rem 1.5rem; border-bottom: 0; }
  .menu .btn { margin: .6rem 1.5rem 0; display: inline-flex; border-radius: 999px; }
  .nav-right { gap: .4rem; }
}
@media (max-width: 640px) {
  :root { --nav-h: 64px; }
  .logo img { height: 30px; }
  .tagline { font-size: .52rem; letter-spacing: .14em; }
  .grid-2, .grid-3, .grid-4, .equip, .values, .stats { grid-template-columns: 1fr; }
  .stats { margin-top: 1.5rem; }
  .card { padding: 1.4rem; }
  .hero { min-height: 70vh; }
  .hero-sub { min-height: 340px; }
  .map iframe { height: 260px; }
  .specs { grid-template-columns: 1fr; gap: .15rem; }
  .specs dt { margin-top: .5rem; }
  .specs dt:first-child { margin-top: 0; }
}