:root{--blue:#1e90ff;--green:#16a34a;--dark:#0f172a;--bg:#f8fafc}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,sans-serif;background:var(--bg);color:#1f2933}
.container{max-width:1100px;margin:0 auto;padding:0 18px}
header{
 background:linear-gradient(rgba(15,23,42,.7),rgba(15,23,42,.7)),url('img/hero.webp') center/cover no-repeat;
 color:white;
}
header .container{padding:72px 0;text-align:center}
h1{margin:0;font-size:44px}
.lead{font-size:18px;margin:10px 0}
.btn{display:inline-block;padding:14px 18px;border-radius:10px;text-decoration:none;font-weight:bold}
.btn.call{background:var(--green);color:white}
.btn.nav{background:rgba(255,255,255,.15);color:white}
section{padding:56px 0}
.grid{display:grid;grid-template-columns:1fr;gap:16px}
.card{background:white;border-radius:12px;padding:18px;box-shadow:0 6px 18px rgba(0,0,0,.08)}
footer{background:var(--dark);color:#e5e7eb;text-align:center;padding:18px}
.lang a{color:white;margin:0 6px;font-weight:bold;text-decoration:none}
@media(min-width:900px){
 h1{font-size:52px}
 .grid{grid-template-columns:repeat(3,1fr)}
}