:root{
  --text:#ffffff;
  --muted:rgba(255,255,255,.85);
  --link:rgba(255,255,255,.9);
  --accent:#2f84ff;   /* iacmag-like blue */
  --accent2:#1e6bff;
  --shadow:0 16px 50px rgba(0,0,0,.35);
  --max:1200px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: "Helvetica Neue", Arial, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color:var(--text);
  background:#0b1220;
}
a{color:inherit; text-decoration:none}
.container{max-width:var(--max); margin:0 auto; padding:0 22px}

/* Top nav over hero */
.header{
  position:absolute;
  top:0; left:0; right:0;
  z-index:30;
  padding:18px 0;
}
.navbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand{
  font-weight:700;
  letter-spacing:.12em;
  font-size:14px;
  opacity:.95;
}
.navlinks{
  display:flex;
  gap:22px;
  align-items:center;
  text-transform:uppercase;
  font-size:12px;
  letter-spacing:.08em;
}
.navlinks a{
  color:var(--link);
  opacity:.9;
}
.navlinks a:hover{opacity:1}
.navlinks a.active{color:var(--accent); opacity:1}

.menu-btn{
  display:none;
  border:1px solid rgba(255,255,255,.35);
  background:rgba(0,0,0,.12);
  color:#fff;
  padding:8px 10px;
  border-radius:10px;
}

/* Hero */
.hero{
  min-height:520px;
  height:72vh;
  max-height:820px;
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(0deg, rgba(0,0,0,.35), rgba(0,0,0,.35)),
    url("assets/img/hero.jpg");
  background-size:cover;
  background-position:center;
  transform:scale(1.03);
}
.hero::after{
  content:"";
  position:absolute; inset:0;
  background:radial-gradient(900px 500px at 50% 20%, rgba(47,132,255,.35), transparent 60%);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  z-index:10;
  padding:110px 18px 40px; /* allow nav space */
}
.hero h1{
  margin:0;
  font-weight:300;
  letter-spacing:.06em;
  text-transform:uppercase;
  font-size:52px;
}
.hero h1 b{
  font-weight:750;
  color:var(--accent);
}
.hero .sub{
  margin:14px auto 0;
  max-width:860px;
  font-size:13px;
  letter-spacing:.10em;
  text-transform:uppercase;
  color:rgba(255,255,255,.78);
}
.hero .btn{
  margin-top:22px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 18px;
  border-radius:3px;
  border:1px solid rgba(255,255,255,.25);
  background:rgba(47,132,255,.92);
  color:#fff;
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  box-shadow:var(--shadow);
}
.hero .btn:hover{background:rgba(47,132,255,1)}

/* White content section like screenshot */
.content{
  background:#ffffff;
  color:#1c2333;
  padding:60px 0 80px;
}
.content h2{
  text-align:center;
  color:#1c2333;
  font-size:28px;
  letter-spacing:.06em;
  margin:0 0 12px;
  font-weight:500;
}
.content p.lead{
  text-align:center;
  max-width:900px;
  margin:0 auto 34px;
  color:#45506b;
  line-height:1.65;
  font-size:14px;
}
.cards{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:18px;
  align-items:stretch;
}
.card{
  grid-column:span 4;
  border:1px solid rgba(0,0,0,.08);
  border-radius:10px;
  padding:18px;
  background:#fff;
  box-shadow:0 10px 30px rgba(0,0,0,.06);
}
.card h3{margin:0 0 10px; font-size:15px}
.card p{margin:0; color:#4a5573; line-height:1.6; font-size:13px}
.card a{
  color:var(--accent2);
  font-weight:600;
}
.footer{
  background:#0b1220;
  color:rgba(255,255,255,.78);
  padding:26px 0 36px;
  font-size:13px;
}
.footer a{color:#fff}

@media (max-width: 980px){
  .hero h1{font-size:38px}
  .navlinks{display:none}
  .menu-btn{display:inline-flex}
  .navlinks.open{
    display:flex;
    position:absolute;
    right:22px;
    top:60px;
    background:rgba(0,0,0,.55);
    border:1px solid rgba(255,255,255,.25);
    border-radius:12px;
    padding:12px 12px;
    flex-direction:column;
    gap:10px;
    width:min(320px, calc(100vw - 44px));
    backdrop-filter: blur(8px);
  }
  .card{grid-column:span 12}
}