body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
}
header {
  background: #222;
  color: #fff;
  padding: 20px 0;
  text-align: center;
}
header nav a {
  margin: 0 15px;
  color: #fff;
  text-decoration: none;
}
section {
  padding: 40px 20px;
}
.container {
  width: 80%;
  margin: auto;
}
h2 {
  border-bottom: 2px solid #333;
  padding-bottom: 10px;
  margin-bottom: 20px;
}
.project {
  background: #fff;
  padding: 15px;
  margin: 10px 0;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
footer {
  background: #222;
  color: #fff;
  text-align: center;
  padding: 10px 0;
}