body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  background-color: #f9f9f9;
  color: #333;
}
header {
  background-color: #004aad;
  color: white;
  padding: 2rem;
  text-align: center;
}
section.intro, section.detail {
  padding: 2rem;
  background-color: #fff;
  margin: 1rem auto;
  max-width: 900px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
}
.project-card {
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  padding: 1.5rem;
  transition: transform 0.3s ease;
}
.project-card:hover {
  transform: translateY(-5px);
}
.project-card h3 {
  color: #004aad;
}
.btn {
  display: inline-block;
  background-color: #004aad;
  color: white;
  padding: 0.7rem 1.2rem;
  border-radius: 6px;
  text-decoration: none;
  margin-top: 0.8rem;
  transition: background 0.3s ease;
}
.btn:hover {
  background-color: #0070ff;
}
footer {
  text-align: center;
  padding: 2rem;
  background-color: #004aad;
  color: white;
  margin-top: 2rem;
}