:root{
  --bg:#0d1420;
  --bg-alt:#111b2a;
  --panel:#16233a;
  --line:#28405f;
  --ink:#e8eef6;
  --muted:#9db1c8;
  --accent:#4fd1c5;
  --accent-dark:#0e2a30;
  --amber:#f0b429;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  background:var(--bg);
  color:var(--ink);
  line-height:1.65;
}
.wrap{max-width:72rem;margin:0 auto;padding:0 1.25rem}

.skip-link{
  position:absolute;left:-9999px;top:0;
  background:var(--accent);color:#06201d;padding:.5rem 1rem;z-index:100;
}
.skip-link:focus{left:0}

a{color:var(--accent)}
a:focus-visible,button:focus-visible{outline:3px solid var(--amber);outline-offset:2px}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(13,20,32,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(4px);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:.6rem;position:relative}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink)}
.brand-mark{
  font-family:var(--mono);font-size:.8rem;color:var(--accent);
  border:1px solid var(--line);border-radius:4px;padding:.2rem .45rem;background:var(--bg-alt);
}
.brand-name{font-weight:700;letter-spacing:.02em}
.nav-toggle{
  display:none;background:none;border:1px solid var(--line);color:var(--ink);
  font:inherit;padding:.4rem .8rem;border-radius:4px;cursor:pointer;
}
.site-nav{display:flex;align-items:center;gap:1.1rem;flex-wrap:wrap}
.site-nav a{color:var(--muted);text-decoration:none;font-size:.95rem}
.site-nav a:hover{color:var(--ink)}
.site-nav .nav-cta{
  color:#06201d;background:var(--accent);padding:.45rem .9rem;border-radius:4px;font-weight:600;
}
.site-nav .nav-cta:hover{background:#6fe3d8;color:#06201d}

/* Blueprint engineering motif (pure CSS, no image files) */
.blueprint,
.hero-bg{
  background-image:
    linear-gradient(rgba(79,209,197,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,209,197,.06) 1px, transparent 1px),
    linear-gradient(rgba(79,209,197,.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,209,197,.12) 1px, transparent 1px);
  background-size:24px 24px,24px 24px,120px 120px,120px 120px;
}

/* Hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-inner{position:relative;padding:5.5rem 1.25rem 5rem;max-width:56rem}
.eyebrow{
  font-family:var(--mono);font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--amber);margin:0 0 1rem;
}
h1{font-size:clamp(1.9rem,4.5vw,3rem);line-height:1.15;margin:0 0 1.25rem}
h2{font-size:clamp(1.5rem,3vw,2.1rem);margin:0 0 1rem;border-left:4px solid var(--accent);padding-left:.8rem}
h3{font-size:1.2rem;margin:0 0 .6rem;color:var(--accent)}
.hero p{max-width:62ch}
.hero-note{font-family:var(--mono);color:var(--muted);font-size:.95rem;border-left:3px solid var(--amber);padding-left:.9rem}

/* Buttons */
.btn{
  display:inline-block;margin-top:1.2rem;
  background:var(--accent);color:#06201d;font-weight:700;text-decoration:none;
  padding:.75rem 1.4rem;border-radius:4px;
}
.btn:hover{background:#6fe3d8}
.btn-outline{
  background:transparent;color:var(--accent);border:1px solid var(--accent);
}
.btn-outline:hover{background:var(--accent-dark)}
.btn-large{font-size:1.1rem;padding:1rem 1.8rem}

/* Sections */
.section{padding:4rem 0}
.section-alt{background-color:var(--bg-alt);border-block:1px solid var(--line)}
.lede{font-size:1.2rem;color:var(--ink);font-weight:600}
.section p{max-width:62ch;color:var(--muted)}
.section .lede{color:var(--ink)}

.service-grid{
  display:grid;gap:1.5rem;margin-top:2rem;
  grid-template-columns:repeat(auto-fit,minmax(17rem,1fr));
}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:6px;
  padding:1.5rem;display:flex;flex-direction:column;
}
.card .btn{margin-top:auto;align-self:flex-start}
.card p{color:var(--muted)}

ul.cols{
  columns:2;column-gap:2.5rem;padding-left:1.2rem;color:var(--muted);
  max-width:60ch;
}
ul.cols li{break-inside:avoid;margin-bottom:.3rem}
.card ul.cols{columns:1;max-width:none}

.split{display:grid;gap:2.5rem;grid-template-columns:1fr;align-items:start}
@media(min-width:56rem){
  .split{grid-template-columns:1fr 1fr}
}

.section-cta{background:linear-gradient(180deg,var(--bg-alt),#0a1a24);border-top:1px solid var(--line)}
.cta-list{list-style:none;padding:0;margin:1rem 0;font-size:1.15rem}
.cta-list li{padding:.25rem 0 .25rem 1.6rem;position:relative}
.cta-list li::before{content:"\25B8";position:absolute;left:0;color:var(--amber)}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding:1.5rem 0;color:var(--muted);font-size:.9rem}
.footer-inner{display:flex;flex-wrap:wrap;gap:.5rem 2rem;justify-content:space-between}

/* Reveal enhancement */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.js .reveal.is-visible{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* Mobile nav */
@media(max-width:52rem){
  .nav-toggle{display:block}
  .site-nav{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--bg-alt);border-bottom:1px solid var(--line);
    flex-direction:column;align-items:flex-start;padding:1rem 1.25rem;gap:.9rem;
  }
  .site-nav.open{display:flex}
  ul.cols{columns:1}
}