body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  background: #E6F5EA;
  color: #333;
}
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: #C9EBD1;
}
nav a {
  margin-left: 1rem;
  text-decoration: none;
  color: #2E7D32;
}
.hero {
  text-align: center;
  padding: 120px 20px;
}
.btn {
  background: #4CAF50;
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
}
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
}
footer {
  background: #2E7D32;
  color: white;
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
}