body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  color: #333;
  margin: 0;
  padding: 0;
}

header {
  background-color: #009688;
  color: white;
  padding: 15px 20px;
  text-align: center;
}

header h1 {
  margin: 0;
}

nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  margin: 0;
}

nav ul li {
  margin: 0 15px;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 20px;
  max-width: 800px;
  margin: 20px auto;
  background-color: white;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

section {
  margin-bottom: 30px;
}

section h2 {
  border-bottom: 2px solid #009688;
  padding-bottom: 10px;
  margin-bottom: 20px;
}

ul {
  list-style: none;
  padding: 0;
}

ul li {
  padding: 10px 0;
  border-bottom: 1px solid #ddd;
}

ul li:last-child {
  border-bottom: none;
}

ul li strong {
  color: #009688;
}