/* ==========================================================================
   U2 Defence — site.css
   Brand: deep navy + military olive. Dark, cinematic, defence-industry tone.
   ========================================================================== */

:root{
  --navy-950:#0B131C;
  --navy-900:#101A26;
  --navy-850:#16202E;   /* logo lockup background */
  --navy-800:#1C2838;
  --navy-700:#26374B;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.18);

  --olive:#7C9150;      /* brand accent */
  --olive-bright:#93AC63;
  --olive-dim:rgba(124,145,80,.14);

  --white:#FFFFFF;
  --text:#E8EDF3;
  --text-mute:#93A2B4;
  --text-faint:#6B7A8C;

  --container:1200px;
  --pad-x:24px;
  --radius:14px;
  --nav-h:76px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--navy-950);color:var(--text);
  font-family:"Inter","Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,figure{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--olive-bright);outline-offset:3px;border-radius:4px}

.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--pad-x)}
.section{padding-block:112px;position:relative}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--olive);color:#fff;padding:12px 20px;font-weight:600}
.skip-link:focus{left:0}

/* ---------- type ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--olive-bright);margin-bottom:20px;
}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--olive);display:block}
.h1{font-size:clamp(38px,6.2vw,74px);line-height:1.04;font-weight:800;letter-spacing:-.03em;color:#fff}
.h2{font-size:clamp(30px,4vw,46px);line-height:1.14;font-weight:800;letter-spacing:-.02em;color:#fff}
.h3{font-size:21px;line-height:1.3;font-weight:700;color:#fff;letter-spacing:-.01em}
.lead{font-size:clamp(17px,1.8vw,20px);line-height:1.65;color:var(--text-mute);max-width:66ch}
.body{color:var(--text-mute)}
.accent{color:var(--olive-bright)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:52px;padding:0 30px;border-radius:6px;border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.02em;cursor:pointer;
  transition:background-color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--olive{background:var(--olive);color:#fff}
.btn--olive:hover{background:var(--olive-bright)}
.btn--ghost{border-color:var(--line-strong);color:#fff;background:transparent}
.btn--ghost:hover{border-color:var(--olive);background:var(--olive-dim)}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:100;background:rgba(11,19,28,.86);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--line)}
.nav__inner{max-width:var(--container);margin-inline:auto;padding-inline:var(--pad-x);min-height:var(--nav-h);display:flex;align-items:center;gap:28px}
.nav__logo{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav__logo .logo-img{height:38px;width:auto;filter:brightness(0) invert(1)}
.nav__menu{display:flex;align-items:center;gap:34px;margin-inline:auto}
.nav__link{font-size:15px;font-weight:500;color:var(--text-mute);transition:color .15s ease}
.nav__link:hover{color:#fff}
.nav__burger{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;position:relative}
.nav__burger span,.nav__burger span::before,.nav__burger span::after{content:"";position:absolute;left:11px;width:22px;height:2px;background:#fff;transition:.2s}
.nav__burger span{top:21px}
.nav__burger span::before{top:-7px;left:0}
.nav__burger span::after{top:7px;left:0}
.nav__burger[aria-expanded="true"] span{background:transparent}
.nav__burger[aria-expanded="true"] span::before{transform:rotate(45deg);top:0}
.nav__burger[aria-expanded="true"] span::after{transform:rotate(-45deg);top:0}

/* ---------- hero ---------- */
.hero{position:relative;padding-block:132px 120px;overflow:hidden;border-bottom:1px solid var(--line)}
.hero__grid-bg{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 78% 62% at 50% 34%,#000 30%,transparent 76%);
  -webkit-mask-image:radial-gradient(ellipse 78% 62% at 50% 34%,#000 30%,transparent 76%);
}
.hero__glow{position:absolute;left:50%;top:-14%;transform:translateX(-50%);width:min(1000px,120%);aspect-ratio:1.6;pointer-events:none;
  background:radial-gradient(ellipse at center,rgba(124,145,80,.20),transparent 62%)}
.hero__inner{position:relative}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-top:38px}
.hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:84px;padding-top:38px;border-top:1px solid var(--line)}
.stat__num{font-size:clamp(26px,3vw,34px);font-weight:800;color:#fff;line-height:1.1;letter-spacing:-.02em}
.stat__label{font-size:13px;color:var(--text-faint);margin-top:8px;letter-spacing:.04em}

/* ---------- capabilities ---------- */
.caps{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:56px}
.cap{
  position:relative;background:linear-gradient(160deg,var(--navy-850),var(--navy-900));
  border:1px solid var(--line);border-radius:var(--radius);padding:36px 34px 34px;
  transition:border-color .2s ease,transform .2s ease;overflow:hidden;
}
.cap:hover{border-color:rgba(124,145,80,.5);transform:translateY(-3px)}
.cap::after{content:"";position:absolute;left:0;top:0;width:3px;height:0;background:var(--olive);transition:height .25s ease}
.cap:hover::after{height:100%}
.cap__idx{font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--olive-bright);margin-bottom:18px;display:block}
.cap__title{margin-bottom:14px}
.cap__text{font-size:15.5px;color:var(--text-mute);line-height:1.72}
.cap__list{margin-top:20px;display:flex;flex-wrap:wrap;gap:8px}
.cap__list li{font-size:12.5px;color:var(--text-faint);border:1px solid var(--line);border-radius:100px;padding:5px 13px}

/* ---------- stack ---------- */
.stack{background:var(--navy-900);border-block:1px solid var(--line)}
.stack__grid{display:grid;grid-template-columns:1fr 1.15fr;gap:72px;align-items:center}
.stack__items{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.stack__item{border:1px solid var(--line);border-radius:10px;padding:20px 22px;background:rgba(255,255,255,.02)}
.stack__name{font-weight:700;color:#fff;font-size:16px}
.stack__role{font-size:13.5px;color:var(--text-faint);margin-top:5px}

/* ---------- process ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:56px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.step{padding:34px 30px;border-right:1px solid var(--line);background:var(--navy-900)}
.step:last-child{border-right:0}
.step__n{width:38px;height:38px;border-radius:8px;background:var(--olive-dim);border:1px solid rgba(124,145,80,.4);
  display:grid;place-items:center;font-weight:800;color:var(--olive-bright);font-size:15px;margin-bottom:18px}
.step__t{font-weight:700;color:#fff;margin-bottom:9px;font-size:17px}
.step__d{font-size:14.5px;color:var(--text-mute);line-height:1.65}

/* ---------- assurance ---------- */
.assure{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:52px}
.assure__item{border:1px solid var(--line);border-radius:var(--radius);padding:32px 30px;background:var(--navy-900)}
.assure__t{font-weight:700;color:#fff;margin-bottom:10px;font-size:17px}
.assure__d{font-size:14.5px;color:var(--text-mute)}

/* ---------- cta ---------- */
.cta{position:relative;overflow:hidden;background:linear-gradient(150deg,var(--navy-850),var(--navy-950) 70%);border-top:1px solid var(--line)}
.cta__glow{position:absolute;right:-8%;top:-40%;width:640px;aspect-ratio:1;pointer-events:none;
  background:radial-gradient(circle at center,rgba(124,145,80,.22),transparent 62%)}
.cta__inner{position:relative;text-align:center;max-width:760px;margin-inline:auto}
.cta__actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:34px}
.cta__note{margin-top:24px;font-size:13.5px;color:var(--text-faint)}

/* ---------- footer ---------- */
.footer{background:var(--navy-950);border-top:1px solid var(--line);padding-block:64px 40px}
.footer__top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:56px}
.footer__logo .logo-img{height:46px;width:auto;margin-bottom:20px;filter:brightness(0) invert(1)}
.footer__desc{font-size:14.5px;color:var(--text-faint);max-width:38ch}
.footer h2{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--text-faint);margin-bottom:18px}
.footer li{margin-bottom:11px}
.footer li a,.footer address{font-size:14.5px;color:var(--text-mute);font-style:normal;line-height:1.85}
.footer li a:hover{color:var(--olive-bright)}
.footer__bottom{margin-top:52px;padding-top:26px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-faint)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .stack__grid{grid-template-columns:1fr;gap:44px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(2){border-right:0}
  .step:nth-child(1),.step:nth-child(2){border-bottom:1px solid var(--line)}
  .assure{grid-template-columns:1fr}
  .hero__stats{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:820px){
  .section{padding-block:80px}
  .hero{padding-block:88px 80px}
  .caps{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr;gap:40px}
  .nav__burger{display:block;margin-left:auto}
  .nav__menu{
    position:absolute;left:0;right:0;top:var(--nav-h);flex-direction:column;align-items:flex-start;
    gap:0;background:var(--navy-900);border-bottom:1px solid var(--line);padding:8px 24px 20px;
    display:none;margin:0;
  }
  .nav__menu.is-open{display:flex}
  .nav__menu li{width:100%}
  .nav__link{display:block;padding:14px 0;border-bottom:1px solid var(--line);width:100%}
  .nav__cta-wrap{display:none}
}
@media (max-width:520px){
  :root{--pad-x:18px}
  .steps{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--line)}
  .step:last-child{border-bottom:0}
  .hero__stats{grid-template-columns:1fr 1fr;gap:24px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto}
}