:root{
  --primary:#2563eb;
  --bg:#f1f5f9;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --radius:18px;
}

*{
  box-sizing:border-box;
  margin:0;
  padding:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto;
}

body{
  background:var(--bg);
  color:var(--text);
}

.container{
  max-width:1100px;
  margin:auto;
  padding:24px;
}

.hero{
  background:linear-gradient(135deg,#2563eb,#0ea5e9);
  color:white;
  padding:36px;
  border-radius:var(--radius);
  text-align:center;
  margin-bottom:32px;
}

.hero.small{padding:26px}

.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:20px;
}

.card{
  background:var(--card);
  padding:22px;
  border-radius:var(--radius);
  box-shadow:0 10px 25px rgba(0,0,0,.06);
}

.card.nav{
  text-decoration:none;
  color:var(--text);
  transition:.25s;
}

.card.nav:hover{
  transform:translateY(-4px);
  box-shadow:0 18px 35px rgba(0,0,0,.08);
}

.links a{
  display:block;
  background:white;
  padding:14px 18px;
  border-radius:14px;
  margin-bottom:12px;
  text-decoration:none;
  color:var(--text);
  box-shadow:0 8px 20px rgba(0,0,0,.05);
}

.links a:hover{background:#e0f2fe}

.btn.back{
  display:inline-block;
  margin-top:24px;
  padding:10px 16px;
  background:var(--primary);
  color:white;
  text-decoration:none;
  border-radius:12px;
}

footer{
  margin-top:40px;
  text-align:center;
  color:var(--muted);
  font-size:.85rem;
}