body {
  font-family: Arial, sans-serif;
  background-color: #f4f6f9;
  margin: 0;
  padding: 0;
  color: #333;
}

header {
  background-color: #2c3e50;
  color: white;
  padding: 2rem;
  text-align: center;
}

h1 {
  margin: 0;
  font-size: 2.5rem;
}

main {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 800px;
  margin: auto;
}

.course {
  background-color: white;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  transition: transform 0.2s;
}

.course:hover {
  transform: scale(1.02);
}

.course h2 {
  margin-top: 0;
}

.course a {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background-color: #3498db;
  color: white;
  text-decoration: none;
  border-radius: 6px;
}

.course a:hover {
  background-color: #2980b9;
}