:root{
  --bg:#071a24;
  --card:#0b2432;
  --text:#f4f7fb;
  --muted:#b9c6d1;
  --brand:#27c2a5;
  --brand2:#1aa7ff;
  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --radius: 18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#05131b 0%, #071a24 40%, #05131b 100%);
}
a{color:inherit;text-decoration:none}
.container{width:min(1120px,92vw);margin:0 auto}
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(5,19,27,.75);
  backdrop-filter: blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:40px;height:40px;border-radius:12px}
.brand .title{display:flex;flex-direction:column;line-height:1.1}
.brand .title strong{font-size:15px}
.brand .title span{font-size:12px;color:var(--muted)}
.menu{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end}
.menu a{font-size:13px;color:var(--muted);padding:8px 10px;border-radius:12px}
.menu a:hover{color:var(--text);background:rgba(255,255,255,.06)}
.hero{
  position:relative;
  padding:70px 0 30px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;inset:-60px;
  background:
    radial-gradient(800px 500px at 20% 10%, rgba(39,194,165,.22), transparent 60%),
    radial-gradient(700px 450px at 85% 20%, rgba(26,167,255,.18), transparent 60%),
    radial-gradient(1000px 700px at 50% 90%, rgba(255,255,255,.06), transparent 55%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:center}
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 12px;border-radius:999px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.10);
  color:var(--muted);
  font-size:13px;
}
.h1{margin:14px 0 10px;font-size:44px;line-height:1.08;letter-spacing:-.02em}
.lead{margin:0;color:var(--muted);font-size:17px;line-height:1.6;max-width:52ch}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:10px;
  padding:12px 16px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
  color:var(--text);
  font-weight:650;
}
.btn:hover{transform:translateY(-1px);transition:.12s ease}
.btn.primary{
  background:linear-gradient(90deg, rgba(39,194,165,.95), rgba(26,167,255,.95));
  border:0;
}
.btn.ghost{background:transparent}
.hero-card{
  background:rgba(11,36,50,.62);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.hero-card .photo{
  height:220px;
  background:
    linear-gradient(180deg, rgba(0,0,0,.00), rgba(0,0,0,.55)),
    url('../img/itaipu-2.jpg') center/cover no-repeat;
}
.hero-card .inner{padding:16px 16px 18px}
.hero-card h3{margin:0 0 8px;font-size:16px}
.hero-card p{margin:0;color:var(--muted);line-height:1.55;font-size:13.5px}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.badge{
  font-size:12px;color:var(--muted);
  padding:7px 10px;border-radius:999px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.10);
}
.section{padding:38px 0}
.section h2{margin:0 0 14px;font-size:26px;letter-spacing:-.01em}
.section p{margin:0;color:var(--muted);line-height:1.7}
.grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  margin-top:16px;
}
.card{
  background:rgba(11,36,50,.56);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--radius);
  padding:16px;
  box-shadow:0 10px 30px rgba(0,0,0,.25);
}
.card h3{margin:0 0 6px;font-size:15px}
.card p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.6}
.split{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:stretch}
.gallery{
  display:grid;grid-template-columns:1.2fr .8fr;gap:14px;margin-top:16px
}
.gallery .big{
  min-height:280px;border-radius:var(--radius);overflow:hidden;
  background:url('../img/itaipu-1.jpg') center/cover no-repeat;
  border:1px solid rgba(255,255,255,.10);
}
.gallery .small{
  min-height:280px;border-radius:var(--radius);overflow:hidden;
  background:url('../img/itaipu-2.jpg') center/cover no-repeat;
  border:1px solid rgba(255,255,255,.10);
}
.footer{
  padding:28px 0 38px;
  border-top:1px solid rgba(255,255,255,.08);
  color:var(--muted);
  font-size:13px;
}
.footer .row{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.note{
  margin-top:12px;
  padding:12px 14px;
  border-radius:14px;
  background:rgba(255,255,255,.05);
  border:1px dashed rgba(255,255,255,.15);
}
@media (max-width: 900px){
  .hero-grid{grid-template-columns:1fr}
  .h1{font-size:36px}
  .grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .gallery{grid-template-columns:1fr}
  .hero{padding-top:54px}
}