.hero-section {
  padding: 5rem 0;
  background: linear-gradient(
    135deg,
    var(--primary) 0%,
    var(--accent) 50%,
    var(--primary-dark) 100%
  );
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 800;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
  font-size: 1.4rem;
  max-width: 700px;
  margin: 0 auto 2.5rem;
  opacity: 0.9;
  font-weight: 300;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Course Overview Section */
.course-overview {
  margin: 3rem 0;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.overview-item {
  background: var(--bg-primary);
  padding: 1.5rem;
  margin: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.overview-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.overview-item i {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.overview-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

.overview-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Program Highlights Section */
.program-highlights {
  margin: 3rem 0;
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 1.5rem;
}

.highlight-item {
  background: var(--bg-primary);
  padding: 2rem;
  margin: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.highlight-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.highlight-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: white;
  font-size: 1.8rem;
}

.highlight-item h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--dark);
  text-align: center;
}

.highlight-item p {
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.6;
}

/* Curriculum Structure Section */
.curriculum {
  margin: 3rem 0;
}

.semester-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.semester {
  background: var(--bg-primary);
  padding: 1.5rem;
  margin: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.semester:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.semester h3 {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
}

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

.semester li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.5rem;
}

.semester li::before {
  content: "•";
  color: var(--primary);
  font-size: 1.5rem;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
}

/* Career Prospects Section */
.career-prospects {
  margin: 3rem 0;
}

.career-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.career-item {
  background: var(--bg-primary);
  padding: 1.5rem;
  margin: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.career-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.career-item h3 {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 0.8rem;
}

.career-item p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.salary-range {
  font-weight: 600;
  color: var(--success);
  background: rgba(16, 185, 129, 0.1);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  display: inline-block;
  font-size: 0.9rem;
}

/* Placement Statistics Section */
.placement-stats {
  margin: 3rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.stat-item {
  background: var(--bg-primary);
  padding: 1.5rem;
  margin: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Call to Action Section */
.cta-section {
  margin: 3rem 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--dark);
}

.cta-section p {
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2rem;
  font-size: 1.1rem;
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Dark Mode Styles */
body.dark-mode .overview-item,
body.dark-mode .highlight-item,
body.dark-mode .semester,
body.dark-mode .career-item,
body.dark-mode .stat-item {
  background-color: rgba(30, 41, 59, 0.95);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid #334155;
}

body.dark-mode .overview-item h3,
body.dark-mode .highlight-item h3,
body.dark-mode .semester h3,
body.dark-mode .career-item h3,
body.dark-mode .cta-section h2 {
  color: #a78bfa;
}

body.dark-mode .overview-item p,
body.dark-mode .highlight-item p,
body.dark-mode .semester li,
body.dark-mode .career-item p,
body.dark-mode .stat-label,
body.dark-mode .cta-section p {
  color: #cbd5e1;
}

body.dark-mode .semester li::before {
  color: #a78bfa;
}

body.dark-mode .stat-number {
  color: #a78bfa;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .overview-grid,
  .highlights-grid,
  .semester-grid,
  .career-grid,
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-buttons .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .hero-section h1 {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .overview-grid,
  .highlights-grid,
  .semester-grid,
  .career-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 1.8rem;
  }
}