/* IUSAT premium technology landing page */
:root{
  --navy:#041421; --navy2:#071e32; --cyan:#36c7ff; --cyan2:#0b8fe0;
  --text:#eef6fb; --muted:#a9bdc9; --light:#f4f8fb; --ink:#0a1b29;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",Arial,sans-serif;color:var(--text);background:var(--navy)}
a{text-decoration:none;color:inherit}
.container{width:min(1180px,92%);margin:auto}
.nav{position:sticky;top:0;z-index:20;background:rgba(4,20,33,.96);border-bottom:1px solid rgba(54,199,255,.18);backdrop-filter:blur(8px)}
.nav-inner{height:76px;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:34px;font-weight:800;letter-spacing:4px}
.logo span{color:var(--cyan)}
.nav-links{display:flex;gap:28px;font-size:14px;color:#d8e5ec}
.nav-links a:hover{color:var(--cyan)}
.hero{min-height:640px;background:linear-gradient(90deg,rgba(4,20,33,.98) 0%,rgba(4,20,33,.86) 44%,rgba(4,20,33,.28) 100%),url('../images/iusat-hero.jpg') center/cover}
.hero-inner{padding:110px 0 90px;max-width:650px}
.kicker{color:var(--cyan);font-size:14px;font-weight:700;letter-spacing:2px;text-transform:uppercase}
h1{font-size:clamp(56px,9vw,104px);line-height:.9;margin:20px 0 18px;letter-spacing:-3px}
.hero h2{font-size:38px;margin:0 0 22px}
.lead{font-size:21px;line-height:1.6;color:#d6e3ea;max-width:650px}
.btn{display:inline-block;padding:15px 25px;border-radius:6px;font-weight:700;margin:14px 10px 0 0;border:1px solid var(--cyan)}
.btn-primary{background:var(--cyan2)}
.btn-secondary{background:transparent}
.section-light{background:var(--light);color:var(--ink);padding:82px 0}
.section-dark{background:var(--navy2);padding:82px 0}
.center{text-align:center}
.eyebrow{color:var(--cyan2);font-weight:700;letter-spacing:1.8px;text-transform:uppercase;font-size:13px}
h2.section-title{font-size:42px;margin:12px 0 14px}
.section-copy{font-size:18px;line-height:1.7;color:#516473;max-width:780px;margin:0 auto 40px}
.portfolio{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.domain{background:#fff;border:1px solid #dce7ee;border-radius:10px;padding:25px 15px;text-align:center;box-shadow:0 8px 24px rgba(0,25,50,.07)}
.domain strong{display:block;font-size:19px;margin-bottom:8px}
.domain small{color:#647886}
.why{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}
.checks{list-style:none;padding:0;margin:30px 0}
.checks li{margin:17px 0;font-size:18px;color:#d6e4eb}
.checks li:before{content:"✓";color:var(--cyan);font-weight:bold;margin-right:13px}
.visual{border-radius:12px;overflow:hidden;border:1px solid rgba(54,199,255,.2)}
.visual img{width:100%;display:block}
.cards{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.card{background:#0b2539;border:1px solid rgba(54,199,255,.16);border-radius:9px;overflow:hidden}
.card img{width:100%;height:150px;object-fit:cover}
.card h3{font-size:17px;margin:17px 18px 8px}
.card p{font-size:14px;line-height:1.55;color:var(--muted);margin:0 18px 22px}
.cta{background:linear-gradient(100deg,#082a42,#06385a);padding:55px 0}
.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:30px}
.cta h2{font-size:36px;margin:0 0 10px}
.cta p{color:#c5d7e0;font-size:18px;margin:0}
.footer{background:#020d17;padding:42px 0 22px;border-top:1px solid rgba(54,199,255,.15)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:35px}
.footer h3{margin-top:0}
.footer p,.footer a{color:#a9bdc9;line-height:1.8}
.contact a{display:block;color:#dceaf1;margin:7px 0}
.legal{border-top:1px solid rgba(255,255,255,.1);margin-top:30px;padding-top:18px;color:#6f8795;font-size:12px;display:flex;justify-content:space-between}
@media(max-width:850px){
 .nav-links{display:none}.portfolio{grid-template-columns:repeat(2,1fr)}
 .why{grid-template-columns:1fr}.cards{grid-template-columns:1fr 1fr}.cta-inner{display:block}
 .footer-grid{grid-template-columns:1fr}.hero{min-height:590px}
}
@media(max-width:520px){.portfolio,.cards{grid-template-columns:1fr}h2.section-title{font-size:32px}.hero-inner{padding-top:75px}.hero h2{font-size:28px}}