body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background: #f4f4f4;
  color: #333;
}

header {
  background: #333;
  color: #fff;
  padding: 2rem;
  text-align: center;
}

header a {
  color: #fff;
  background: #0077ff;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  text-decoration: none;
}

section {
  padding: 2rem;
  max-width: 900px;
  margin: auto;
}

.project-card {
  background: #fff;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}