body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  line-height: 1.6;
  background: #f9f9f9;
}

header {
  background: #333;
  color: #fff;
  padding: 10px 0;
}

.navbar {
  width: 90%;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

.navbar a {
  text-decoration: none;
  color: #fff;
  font-weight: 500;
}

.navbar a.active {
  border-bottom: 2px solid #3498db;
}

.hero, .about {
  text-align: center;
  padding: 80px 20px;
}

.hero h1 {
  font-size: 36px;
  margin-bottom: 20px;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  background: #3498db;
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.btn:hover {
  background: #2980b9;
}