:root {
  --blue: #17618d;
  --blue-dark: #0c3854;
  --blue-soft: #eaf3f8;
  --graphite: #34363a;
  --text: #4e555b;
  --muted: #6d777e;
  --line: #dce3e7;
  --surface: #f4f6f7;
  --white: #ffffff;
  --shadow: 0 20px 50px rgba(15, 38, 52, 0.12);
  --radius: 18px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

.skip-link {
  position: fixed;
  left: 12px;
  top: -60px;
  z-index: 999;
  padding: 10px 14px;
  background: var(--white);
  color: var(--blue-dark);
  border-radius: 8px;
}
.skip-link:focus { top: 12px; }

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid rgba(220,227,231,.85);
  backdrop-filter: blur(14px);
  transition: box-shadow .25s ease;
}
.site-header.scrolled { box-shadow: 0 10px 30px rgba(15,38,52,.08); }
.nav-wrap {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand { display: inline-flex; width: 220px; flex: 0 0 auto; }
.brand img { width: 100%; height: auto; }
.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav a {
  text-decoration: none;
  color: var(--graphite);
  font-size: .94rem;
  font-weight: 650;
  transition: color .2s ease;
}
.main-nav a:hover, .main-nav a:focus-visible { color: var(--blue); }
.main-nav .nav-cta {
  padding: 10px 18px;
  border-radius: 999px;
  color: var(--white);
  background: var(--blue);
}
.main-nav .nav-cta:hover { color: var(--white); background: var(--blue-dark); }
.menu-toggle { display: none; border: 0; background: transparent; padding: 8px; cursor: pointer; }
.menu-toggle span { display: block; width: 26px; height: 2px; margin: 5px 0; background: var(--graphite); transition: .2s ease; }

.hero {
  min-height: 760px;
  position: relative;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
  padding: 160px 0 98px;
}
.hero-image, .hero-overlay { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-image { object-fit: cover; object-position: center; transform: scale(1.02); }
.hero-overlay {
  background:
    linear-gradient(90deg, rgba(8,32,47,.88) 0%, rgba(8,32,47,.66) 45%, rgba(8,32,47,.18) 78%),
    linear-gradient(0deg, rgba(8,32,47,.68) 0%, rgba(8,32,47,0) 58%);
}
.hero-content { position: relative; z-index: 2; max-width: 890px; margin-left: max(20px, calc((100vw - var(--container))/2)); margin-right: 20px; }
.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .15em;
  text-transform: uppercase;
}
.hero .eyebrow { color: #8fc5e1; }
.hero h1 {
  max-width: 850px;
  margin: 0;
  color: var(--white);
  font-size: clamp(2.9rem, 6vw, 5.6rem);
  line-height: .98;
  letter-spacing: -.045em;
}
.hero-lead {
  max-width: 730px;
  margin: 28px 0 0;
  color: rgba(255,255,255,.88);
  font-size: clamp(1.05rem, 1.5vw, 1.28rem);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 750;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: var(--white); }
.button-primary:hover { background: #2275a6; }
.button-ghost { border-color: rgba(255,255,255,.52); color: var(--white); background: rgba(255,255,255,.06); }
.button-ghost:hover { background: rgba(255,255,255,.14); border-color: var(--white); }
.button-light { width: 100%; margin-top: 8px; background: var(--white); color: var(--blue-dark); }
.hero-caption {
  position: absolute;
  right: 22px;
  bottom: 22px;
  z-index: 2;
  color: rgba(255,255,255,.68);
  font-size: .78rem;
  letter-spacing: .03em;
}

.section { padding: 110px 0; }
.section-alt { background: var(--surface); }
.split { display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; align-items: start; }
h2 {
  margin: 0;
  color: var(--graphite);
  font-size: clamp(2rem, 3.5vw, 3.55rem);
  line-height: 1.08;
  letter-spacing: -.035em;
}
h3 { color: var(--graphite); }
.intro-copy { font-size: 1.08rem; }
.intro-copy p:first-child { margin-top: 0; }
.intro-copy p:last-child { margin-bottom: 0; }
.capability-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 72px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 14px 35px rgba(15,38,52,.05);
}
.capability-strip div { padding: 28px; border-right: 1px solid var(--line); background: var(--white); }
.capability-strip div:last-child { border-right: 0; }
.capability-strip strong { display: block; color: var(--blue-dark); font-size: 1rem; }
.capability-strip span { display: block; margin-top: 5px; color: var(--muted); font-size: .9rem; }

.section-heading { max-width: 760px; margin-bottom: 48px; }
.section-heading > p:last-child { max-width: 680px; margin: 20px 0 0; font-size: 1.06rem; }
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.service-card {
  min-height: 305px;
  padding: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #c7d8e2; }
.service-number { color: var(--blue); font-size: .8rem; font-weight: 800; letter-spacing: .12em; }
.service-card h3 { margin: 56px 0 14px; font-size: 1.3rem; }
.service-card p { margin: 0; color: var(--muted); font-size: .95rem; }
.disciplines { margin-top: 50px; padding-top: 42px; border-top: 1px solid var(--line); }
.disciplines h3 { margin: 0 0 18px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chips span { padding: 10px 15px; border-radius: 999px; background: var(--blue-soft); color: var(--blue-dark); font-size: .9rem; font-weight: 700; }

.projects-section { background: #fff; }
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.project-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  transition: transform .25s ease, box-shadow .25s ease;
}
.project-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.project-featured { grid-column: 1 / -1; display: grid; grid-template-columns: 1.5fr 1fr; }
.project-image-button {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  padding: 0;
  border: 0;
  overflow: hidden;
  background: #dae0e3;
  cursor: zoom-in;
}
.project-image-button img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.project-image-button:hover img { transform: scale(1.035); }
.contain-image { background: linear-gradient(135deg, #f4f6f7, #e9edef); }
.contain-image img { object-fit: contain; padding: 18px; }
.project-featured .project-image-button { aspect-ratio: auto; min-height: 420px; }
.project-body { padding: 28px 30px 32px; }
.project-featured .project-body { display: flex; flex-direction: column; justify-content: center; padding: 48px; }
.project-tag { margin: 0 0 10px; color: var(--blue); font-size: .72rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.project-body h3 { margin: 0 0 12px; font-size: 1.45rem; line-height: 1.18; }
.project-featured h3 { font-size: 2rem; }
.project-body p:last-child { margin: 0; color: var(--muted); }

.documentation-section { overflow: hidden; background: var(--blue-dark); color: rgba(255,255,255,.83); }
.documentation-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: center; }
.documentation-copy h2 { color: var(--white); }
.documentation-copy > p:not(.eyebrow) { max-width: 590px; margin: 24px 0 0; font-size: 1.06rem; }
.check-list { list-style: none; padding: 0; margin: 30px 0 0; }
.check-list li { position: relative; padding: 9px 0 9px 30px; }
.check-list li::before { content: ""; position: absolute; left: 0; top: 18px; width: 12px; height: 7px; border-left: 2px solid #8fc5e1; border-bottom: 2px solid #8fc5e1; transform: rotate(-45deg); }
.drawing-stack { position: relative; min-height: 500px; }
.drawing-card {
  position: absolute;
  width: 78%;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 30px 70px rgba(0,0,0,.3);
  text-align: left;
  cursor: zoom-in;
}
.drawing-card img { width: 100%; height: 330px; object-fit: cover; object-position: top; }
.drawing-card span { display: block; padding: 14px 18px; color: var(--graphite); font-size: .88rem; font-weight: 750; }
.drawing-card-back { left: 0; top: 0; transform: rotate(-4deg); }
.drawing-card-front { right: 0; bottom: 0; transform: rotate(3deg); }
.drawing-card:hover { z-index: 3; }

.contact-section { background: var(--blue); color: rgba(255,255,255,.84); }
.contact-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 90px; align-items: center; }
.eyebrow-light { color: #b4dcec; }
.contact-title h2 { color: var(--white); max-width: 700px; }
.contact-title > p:last-child { max-width: 620px; margin-top: 24px; font-size: 1.06rem; }
.contact-card { padding: 32px; border: 1px solid rgba(255,255,255,.2); border-radius: var(--radius); background: rgba(9,45,68,.28); box-shadow: 0 30px 70px rgba(7,35,52,.2); }
.contact-row { display: block; padding: 14px 0; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.14); }
a.contact-row:hover strong { text-decoration: underline; }
.contact-row span { display: block; color: rgba(255,255,255,.62); font-size: .78rem; text-transform: uppercase; letter-spacing: .09em; }
.contact-row strong { display: block; margin-top: 3px; color: var(--white); font-size: 1rem; }

.site-footer { padding: 42px 0; border-top: 1px solid var(--line); background: var(--white); }
.footer-grid { display: grid; grid-template-columns: 240px 1fr auto; gap: 40px; align-items: center; }
.footer-grid img { width: 210px; height: auto; object-fit: contain; }
.footer-grid p { margin: 0; }
.footer-small { margin-top: 6px !important; color: var(--muted); font-size: .82rem; }
.footer-links { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.footer-links a { color: var(--blue); text-decoration: none; font-weight: 700; }
.footer-links a:hover { text-decoration: underline; }

.lightbox {
  width: min(94vw, 1280px);
  max-height: 92vh;
  padding: 16px;
  border: 0;
  border-radius: 16px;
  background: #11191e;
  color: var(--white);
  box-shadow: 0 40px 100px rgba(0,0,0,.55);
}
.lightbox::backdrop { background: rgba(4,12,17,.82); backdrop-filter: blur(4px); }
.lightbox img { width: 100%; max-height: 78vh; object-fit: contain; border-radius: 9px; background: #fff; }
.lightbox p { margin: 12px 42px 0 4px; color: rgba(255,255,255,.78); font-size: .9rem; }
.lightbox-close { position: absolute; right: 18px; top: 18px; width: 38px; height: 38px; border: 0; border-radius: 999px; background: rgba(0,0,0,.72); color: #fff; font-size: 1.7rem; line-height: 1; cursor: pointer; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .site-header { position: sticky; }
  .hero { min-height: 690px; padding-top: 110px; }
  .hero-content { margin-inline: auto; }
  .menu-toggle { display: block; }
  .main-nav {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 70px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--white);
    box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 14px; }
  .main-nav .nav-cta { text-align: center; margin-top: 4px; }
  .split, .documentation-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .capability-strip { grid-template-columns: repeat(2, 1fr); }
  .capability-strip div:nth-child(2) { border-right: 0; }
  .capability-strip div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .projects-grid { grid-template-columns: 1fr; }
  .project-featured { grid-column: auto; display: block; }
  .project-featured .project-image-button { min-height: auto; aspect-ratio: 16/9; }
  .project-featured .project-body { padding: 30px; }
  .drawing-stack { min-height: 440px; }
  .contact-grid { align-items: start; }
  .footer-grid { grid-template-columns: 180px 1fr; }
  .footer-links { grid-column: 1 / -1; flex-direction: row; align-items: center; }
}

@media (max-width: 640px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .brand { width: 180px; }
  .nav-wrap { min-height: 68px; }
  .hero { min-height: 620px; padding: 96px 0 70px; }
  .hero h1 { font-size: clamp(2.55rem, 14vw, 3.7rem); }
  .hero-caption { display: none; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .section { padding: 78px 0; }
  .services-grid, .capability-strip { grid-template-columns: 1fr; }
  .capability-strip div { border-right: 0; border-bottom: 1px solid var(--line); }
  .capability-strip div:last-child { border-bottom: 0; }
  .service-card { min-height: auto; }
  .service-card h3 { margin-top: 34px; }
  .project-body, .project-featured .project-body { padding: 24px; }
  .project-featured h3 { font-size: 1.5rem; }
  .drawing-stack { min-height: 390px; }
  .drawing-card { width: 88%; }
  .drawing-card img { height: 250px; }
  .contact-card { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { grid-column: auto; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}