:root {
    --oe-green: #68A079;
    --oe-deep: #0e1b19;
    --ink: #1f2a2e;
    --bg: #68A079;
    --card: #68A079;
    --muted: #b5c0c5;
    --glass: rgba(255,255,255,.08);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}

body{
  font-family:'Poppins',system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  color:#e8f1f2;
  background: radial-gradient(1200px 600px at 10% -10%, #123e34 0%, #0a0f10 40%) fixed;
  background-color:var(--bg);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .8rem 1.2rem;
    backdrop-filter: saturate(120%) blur(8px);
    background-color: #68A079;
    border-bottom: 1px solid rgba(255,255,255,.06);
}

.brand{display:flex;align-items:center;gap:.6rem}
.logo{height:80px;width:auto}
.brand-text{font-weight:700;letter-spacing:.4px}

.nav a{
  color:#eaf2f3;text-decoration:none;margin-left:1rem;font-weight:600;opacity:.9
}
.nav a:hover{opacity:1}
.nav .lang{padding:.3rem .6rem;border:1px solid rgba(255,255,255,.2);border-radius:6px}

.hero{
  min-height:56vh;
  display:grid;place-items:center;
  padding:4rem 1rem;
}
.hero-inner{
  text-align:center;
  max-width:920px;
  background:var(--glass);
  border:1px solid rgba(255,255,255,.08);
  border-radius:18px;
  padding:2.2rem 1.6rem;
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}

.nasa-heading{
  font-family: "Century Gothic", "Futura", "Bahnschrift", Arial, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight:700;
  margin:0 0 .6rem 0;
}

.section{padding:3rem 1.2rem;max-width:1100px;margin:0 auto}

.grid{display:grid;gap:1rem}
.cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

.card{
  background:var(--card);
  border:1px solid rgba(255,255,255,.06);
  border-radius:14px;
  padding:1rem 1.1rem;
  box-shadow:0 6px 18px rgba(0,0,0,.25);
}
.card h3{margin:.2rem 0 .4rem 0}

.contact-form{display:grid;gap:.8rem;max-width:520px}
.contact-form input,.contact-form textarea{
  border-radius:10px;border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.03);
  color:#eaf2f3;padding:.8rem
}
.contact-form textarea{min-height:140px;resize:vertical}

.btn{
  display:inline-block;border-radius:10px;
  padding:.8rem 1.1rem;font-weight:700;text-decoration:none
}
.btn-primary{background:var(--oe-green);color:#05261c}
.btn-ghost{border:1px solid rgba(255,255,255,.28);color:#eaf2f3}

.site-footer{
  text-align:center;color:var(--muted);
  padding:2rem 1rem;border-top:1px solid rgba(255,255,255,.06)
}

@media (max-width:720px){
  .nav a{margin-left:.7rem}
  .hero{min-height:48vh}
}