.d3d-course-content {
  background: #121212;
  padding: clamp(30px, 5vw, 60px);
  color: #fff;
}

.course-structure-header h2 {
  font-size: clamp(24px, 4vw, 32px);
  color: #ffc107;
  text-align: center;
  margin-bottom: 15px;
}

.course-structure-header p {
  text-align: center;
  color: #ccc;
  font-size: clamp(16px, 2vw, 18px);
  margin-bottom: 40px;
}

.semesters-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
  padding: 20px;
}

.semester-card {
  background: #1a1a1a;
  border-radius: 12px;
  padding: 30px;
  flex: 1 1 100%;
  max-width: 600px;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.semester-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(255, 255, 255, 0.1);
}

.semester-card h3 {
  color: #ff3d3d;
  font-size: clamp(18px, 2.5vw, 20px);
  margin-bottom: 15px;
}

.semester-card ul {
  list-style: none;
  padding-left: 0;
}

.semester-card ul li {
  padding: 8px 0;
  border-bottom: 1px solid #333;
  font-size: clamp(14px, 1.5vw, 15px);
  transition: color 0.3s ease;
}

.semester-card ul li:hover {
  color: #ffc107;
}

.software-covered-section {
  background-color: #0f0f0f;
  padding: clamp(30px, 5vw, 50px);
  color: #fff;
  text-align: center;
}

.software-title {
  font-size: clamp(24px, 4vw, 32px);
  color: #ffc107;
  margin-bottom: 30px;
  font-weight: 800;
}

.software-list {
  list-style-type: disc;
  padding-left: 0;
  max-width: 900px;
  margin: 0 auto;
  columns: 2;
  column-gap: clamp(20px, 4vw, 50px);
  font-size: clamp(14px, 1.5vw, 16px);
  text-align: left;
}

.software-list li {
  padding: 8px 0;
  break-inside: avoid;
  color: #ddd;
  transition: color 0.3s ease;
}

.software-list li:hover {
  color: #ffc107;
}

.similar-courses-wrapper {
  padding: 60px 20px;
  background: #0f0f0f;
}

.animation-course-block {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .software-list {
    columns: 1;
  }
  
  .semesters-grid {
    padding: 10px;
  }
  
  .semester-card {
    padding: 20px;
  }
}