:root{
  --ab-blue:#21ACE3; --ab-blue-90:#1C99CC;
  --ab-green:#5FB66E; --ab-orange:#E9721B;
  --ab-gray-1:#414042; --ab-gray-2:#706F6F; --ab-white:#FFF;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Poppins",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ab-gray-1);
  background:#fff;
}
#main{max-width:1100px;margin:24px auto;padding:0 16px}

/* Header */
.site-header{position:sticky;top:0;z-index:1000;background:#fff;border-bottom:1px solid rgba(0,0,0,.06)}
.site-header__wrap{max-width:1100px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand__name{font-weight:800;color:var(--ab-gray-1);font-size:16px;letter-spacing:.2px}
.site-nav{display:flex;align-items:center;gap:12px}
.nav__list{display:flex;gap:6px;list-style:none;margin:0;padding:0}
.nav__link{display:inline-flex;align-items:center;padding:8px 10px;border-radius:8px;color:var(--ab-gray-1);text-decoration:none;font-weight:600}
.nav__link:hover{background:rgba(33,172,227,.08)}
.nav__actions{display:inline-flex;gap:8px;margin-left:8px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border:0;border-radius:8px;font-weight:700;text-decoration:none;cursor:pointer}
.btn--primary{background:var(--ab-blue);color:#fff}
.btn--primary:hover{background:var(--ab-blue-90)}
.btn--ghost{background:transparent;color:var(--ab-blue);border:2px solid var(--ab-blue)}
.btn--ghost:hover{background:rgba(33,172,227,.08)}

/* Footer */
.site-footer{border-top:1px solid rgba(0,0,0,.06);margin-top:40px;background:#fff}
.site-footer__wrap{max-width:1100px;margin:0 auto;padding:14px 16px}
.copy{color:var(--ab-gray-2);font-size:14px}

/* Bienvenida */
.welcome{max-width:900px;margin:32px auto;padding:0 16px;text-align:center}
.welcome h1{font-size:28px;font-weight:800;margin:8px 0 16px;color:var(--ab-blue)}
.welcome p.lead{color:var(--ab-gray-2);margin:0 0 18px}
.welcome video{width:100%;border-radius:12px;margin:0 0 24px;box-shadow:0 4px 14px rgba(0,0,0,.08)}
.cta-row{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.card-cta{flex:1 1 260px;max-width:360px;padding:16px;border-radius:12px;background:#f9f9f9;text-decoration:none;color:inherit;box-shadow:0 4px 12px rgba(0,0,0,.06);transition:transform .15s ease, background .15s ease}
.card-cta:hover{transform:translateY(-2px);background:#fff}
.card-cta h2{font-size:18px;margin:0 0 6px;color:var(--ab-blue)}
.card-cta p{margin:0;color:var(--ab-gray-2)}