#course-list,
#available-courses {
  display: grid;
  gap: 0.5rem;
}

.course-item {
  background: #f4f8ff;
  border: 1px solid #dbe6f5;
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.course-item label {
  font-weight: 500;
}

.btn {
  margin-top: 1rem;
  padding: 0.6rem 1.2rem;
  background: #0a66c2;
  color: #fff;
  border: none;
  border-radius: 0.4rem;
  cursor: pointer;
}

.btn:hover,
.btn:focus {
  background: #084f99;
}

.course-info {
  border-left: 4px solid #0a66c2;
  padding-left: 0.75rem;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: #333;
}

#available-courses-section {
  display: none;
  opacity: 0;
  transition: opacity 0.4s ease-in-out;
}

#available-courses-section.visible {
  display: block;
  opacity: 1;
}

.course-level-heading {
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: #0a66c2;
  border-bottom: 1px solid #dbe6f5;
  padding-bottom: 0.25rem;
}