body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background: #333;
  color: #black;
  padding: 20px;
  text-align: center;
}

nav a {
  color: #blue;
  margin: 0 10px;
  text-decoration: none;
}

section {
  padding: 40px 20px;
  border-bottom: 1px solid #black;
}

.project {
  background-color: #white;
  padding: 15px;
  margin: 15px 0;
  border-radius: 5px;
}