.course-detail-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 14px 0;
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, #0f766e, #16a34a);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.course-detail-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(15, 118, 110, 0.35);
}

.course-detail-btn:focus {
  outline: 3px solid rgba(22, 163, 74, 0.35);
  outline-offset: 3px;
}