:root{
  --green:#0f3b2f;
  --green-2:#154d3e;
  --orange:#ff6b23;
  --text:#0e1a16;
  --muted:#6b7a75;
  --bg:#f6f7f6;
  --white:#ffffff;
  --radius:16px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font:16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
}

.container{max-width:1120px;margin:0 auto;padding:0 20px}

/* Header */
.header{
  background:linear-gradient(180deg, var(--green) 0%, var(--green-2) 100%);
  color:var(--white);
  position:sticky; top:0; z-index:10;
}
.nav{display:flex; align-items:center; justify-content:space-between; padding:14px 0}
.logo{font-weight:800; letter-spacing:.5px}
.brand{color:var(--white); text-decoration:none; font-size:22px}
.links{display:flex; gap:18px; align-items:center}
.links a{color:var(--white); text-decoration:none; opacity:.9}
.links a:hover{opacity:1}

.btn{display:inline-block; padding:10px 16px; border-radius:999px; text-decoration:none}
.btn-primary{background:var(--orange); color:var(--white); font-weight:700}
.btn-ghost{border:1px solid rgba(255,255,255,.4); color:var(--white)}

/* Hero */
.hero{
  background:linear-gradient(180deg, var(--green) 0%, var(--green-2) 100%);
  color:var(--white);
  padding:64px 0 36px;
  text-align:center;
}
.hero h1{font-size:48px; margin:0 0 12px}
.hero p{margin:0 0 18px; color:#e6f0ed}
.accent{color:var(--orange)}
.cta{margin-top:6px}

/* Pillars */
.pillars{list-style:disc; text-align:left; margin:28px auto 0; padding:0 20px; max-width:800px}
.pillars li{margin:6px 0}

/* Categories */
.categories{padding:40px 0}
.categories h2{text-align:center; margin:0 0 18px}
.grid{
  display:grid;
  grid-template-columns:repeat(4, minmax(0,1fr));
  gap:16px;
}
.card{
  background:var(--green);
  color:var(--white);
  padding:18px 16px;
  border-radius:var(--radius);
  text-decoration:none;
  display:flex; align-items:center; gap:10px;
  justify-content:center; min-height:64px;
}
.card:hover{filter:brightness(1.06)}

/* Footer */
.footer{padding:28px 0 40px; color:var(--muted); text-align:center}

/* Responsive */
@media (max-width:900px){
  .hero h1{font-size:36px}
  .grid{grid-template-columns:repeat(2, minmax(0,1fr))}
}
@media (max-width:520px){
  .grid{grid-template-columns:1fr}
}