body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: #f4f4f4;
}
.container {
  width: 90%;
  margin: auto;
  padding: 20px;
}
header {
  background: #333;
  color: #fff;
  padding: 10px 0;
  text-align: center;
}
nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
}
nav ul li {
  margin: 0 15px;
}
.hero {
  background: #007BFF;
  color: white;
  padding: 40px 20px;
  text-align: center;
}