/* =========================
   PAGE CONTENT STYLES
   ========================= */
.page-content {
  max-width: 720px;
  margin: var(--page-margin-top) auto;
  padding: 0 var(--page-content-padding);
  line-height: 1.7;
}

/* =========================
   TEACHING SECTION STYLES
   ========================= */
.teaching-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.teaching-highlight {
  padding: 1.5rem;
  border: 1px solid var(--color-light-gray);
  border-radius: var(--border-radius);
  background-color: var(--color-bg-lighter);
}

.teaching-highlight h3 {
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

.teaching-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.teaching-link-card {
  padding: 1.5rem;
  border: 2px solid var(--color-light-gray);
  border-radius: var(--border-radius);
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  display: block;
}

.teaching-link-card:hover {
  border-color: var(--color-dark);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.teaching-link-card h3 {
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

.teaching-link-card p {
  margin: 0;
  color: var(--color-medium-gray);
  font-size: 0.9rem;
}

.teaching-position {
  background-color: var(--color-bg-light);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin: 1rem 0;
}

.teaching-position h3 {
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

.teaching-position .institution {
  font-weight: bold;
  margin: 0.25rem 0;
}

.teaching-position .department {
  font-style: italic;
  margin: 0.25rem 0;
}

.teaching-position .tenure {
  color: #666;
  font-size: 0.9rem;
  margin: 0.25rem 0;
}

/* =========================
   COURSE STYLES
   ========================= */
.course-card {
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  margin: 2rem 0;
  overflow: hidden;
}

.course-header {
  background-color: var(--color-dark);
  color: var(--color-light);
  padding: 1.5rem;
}

.course-header h3 {
  margin-bottom: 0.5rem;
}

.course-level {
  margin: 0;
  opacity: 0.8;
  font-size: 0.9rem;
}

.course-content {
  padding: 1.5rem;
}

.course-content h4 {
  margin: 1.5rem 0 0.5rem 0;
  color: var(--color-dark);
}

.course-content ul {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.course-content li {
  margin: 0.25rem 0;
}

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.achievement-item {
  text-align: center;
  padding: 1.5rem;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  background-color: #fafafa;
}

.achievement-item h4 {
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

/* =========================
   LECTURE STYLES
   ========================= */
.lecture-topics {
  margin: 2rem 0;
}

.topic-card {
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  background-color: #fafafa;
}

.topic-card h3 {
  margin-bottom: 1rem;
  color: var(--color-dark);
}

.topic-card p {
  margin: 0.5rem 0;
}

.topic-card p strong {
  color: var(--color-dark);
}

.presentation-item {
  border-left: 3px solid var(--color-dark);
  padding-left: 1.5rem;
  margin: 2rem 0;
}

.presentation-item h3 {
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}

.presentation-details {
  font-style: italic;
  color: #666;
  margin: 0.25rem 0;
}

.booking-info {
  background-color: #f8f8f8;
  padding: 1.5rem;
  border-radius: 8px;
  margin: 2rem 0;
}

.booking-info h3 {
  margin: 1.5rem 0 0.5rem 0;
  color: var(--color-dark);
}

.booking-info:first-child h3 {
  margin-top: 0;
}

.booking-contact {
  background-color: #f0f0f0;
  padding: 1.5rem;
  border-radius: 8px;
  margin: 2rem 0;
  text-align: center;
}

.cta-button {
  display: inline-block;
  background-color: var(--color-dark);
  color: var(--color-light);
  padding: 0.75rem 2rem;
  text-decoration: none;
  border-radius: 4px;
  font-weight: bold;
  margin-top: 1rem;
  transition: opacity 0.3s ease;
}

.cta-button:hover {
  opacity: 0.8;
}

/* =========================
   RESPONSIVE ADJUSTMENTS
   ========================= */
@media (max-width: 768px) {
  .teaching-grid,
  .teaching-links,
  .achievement-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .course-header,
  .course-content {
    padding: 1rem;
  }
  
  .topic-card,
  .teaching-highlight,
  .achievement-item {
    padding: 1rem;
  }
}