:root{
  --bg:#05060a; --card:#0b0e14; --muted:#9fb3c8; --cyan:#18e0ff; --blue:#60a5fa; --fuchsia:#e879f9; --ring:rgba(255,255,255,.08);
  --focus: 0 0 0 3px rgba(24,224,255,.45);
}
*{box-sizing:border-box}
html:focus-within{scroll-behavior:smooth}
html,body{margin:0;padding:0;background:var(--bg);color:white;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial}
a{color:inherit;text-decoration:none}
a:focus, button:focus, input:focus, textarea:focus{outline:none; box-shadow: var(--focus)}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* Header: sticky + mobile menu */
.header{position:sticky;top:0;z-index:80;background:rgba(0,0,0,.55);backdrop-filter:blur(8px);border-bottom:1px solid var(--ring);transition:background .25s ease}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:40px;width:40px;border-radius:12px;border:1px solid var(--ring)}
#menuBtn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:transparent;border:1px solid var(--ring);color:#e2f4ff;border-radius:10px;padding:8px 10px}
.nav{display:none;gap:20px}
.nav a{color:#cfe7ff}
.nav.open{display:flex;flex-direction:column;position:absolute;left:0;right:0;top:58px;background:rgba(0,0,0,.9);padding:12px;border-bottom:1px solid var(--ring)}
@media(min-width:768px){#menuBtn{display:none}.nav{display:flex}.nav.open{position:static;flex-direction:row;background:transparent;border:0;padding:0}}
.cta{display:none}
@media(min-width:768px){.cta{display:inline-flex}}

.btn{background:linear-gradient(90deg,var(--cyan),var(--blue));padding:10px 14px;border-radius:12px;border:0;color:#001018;font-weight:700;cursor:pointer}
.btn.secondary{background:transparent;color:white;border:1px solid var(--ring)}

/* HERO watermark */
.hero{position:relative;overflow:hidden}
.hero::before{
  content:'';position:absolute;inset:0;z-index:-1;
  background-image:url('/assets/hero-circuit.webp');
  background-size:cover;background-position:center;
  opacity:.18;filter:saturate(120%) blur(.2px);
}
.hero .scrim{position:absolute;inset:0;z-index:-1;
  background:radial-gradient(1200px 400px at 50% 20%, rgba(0,0,0,0) 0%, rgba(0,0,0,.35) 65%, rgba(0,0,0,.55) 100%);
}
.bg-grid{position:absolute;inset:0;z-index:-2;background-image:radial-gradient(circle at 25% 15%,rgba(24,224,255,.18),transparent 55%),radial-gradient(circle at 85% 50%,rgba(96,165,250,.12),transparent 55%),radial-gradient(circle at 10% 85%,rgba(232,121,249,.12),transparent 55%)}
.bg-grid::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(20,184,166,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(96,165,250,.12) 1px,transparent 1px);background-size:40px 40px}
.hero .inner{display:block;padding:56px 0}
.hero h1{font-size:32px;line-height:1.2;margin:0 0 8px;text-shadow:0 2px 18px rgba(0,0,0,.35)}
@media(min-width:900px){.hero h1{font-size:44px}}
.hero p{color:#d2e5f7;text-shadow:0 2px 12px rgba(0,0,0,.35);max-width:60ch}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}
.list{display:grid;grid-template-columns:1fr;gap:8px;margin-top:6px}
@media(min-width:760px){.list{grid-template-columns:repeat(2,minmax(0,1fr))}}

.section{padding:56px 0}
.grid{display:grid;gap:18px}
.cards{grid-template-columns:1fr}
@media(min-width:900px){.cards{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{background:rgba(0,0,0,.38);border:1px solid var(--ring);border-radius:16px;overflow:hidden}
.card .p{padding:20px}
.case-img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block;transition:transform .5s}
.card:hover .case-img{transform:scale(1.03)}

/* Clients tags */
.badges span{display:inline-block;margin:6px 6px 0 0;padding:6px 10px;border:1px solid rgba(255,255,255,.12);border-radius:999px;font-size:12px;color:#bfe7ff}

/* Footer */
.footer{border-top:1px solid var(--ring);text-align:center;padding:28px 0;color:#97a8bc}

/* Reveal (respeita prefers-reduced-motion) */
@media (prefers-reduced-motion: no-preference){
  .reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
  .reveal.is-visible{opacity:1;transform:none}
}

/* Floating WhatsApp CTA */
.fab{position:fixed;right:16px;bottom:16px;z-index:90}
.fab a{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(90deg,var(--cyan),var(--blue));color:#001018;padding:10px 14px;border-radius:999px;font-weight:700;border:0}
.fab svg{width:18px;height:18px}