body {
  font-family: Arial, sans-serif;
  background: #f3f0ff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(128, 0, 128, 0.2);
  width: 400px;
}

h1 {
  text-align: center;
  color: #800080; /* purple */
}

.course {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

input[type="number"],
select {
  width: 50%;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

button {
  margin: 10px 5px 0 0;
  padding: 10px 15px;
  border: none;
  background: #800080;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #660066;
}

#result {
  text-align: center;
  margin-top: 20px;
  color: green;
  font-weight: bold;
}