.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.course-card {
  background: var(--md-code-bg-color);
  border-radius: 12px;
  padding: 2rem;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid var(--md-default-fg-color--lightest);
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.course-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.course-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.course-card .course-description {
  color: var(--md-default-fg-color--light);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.course-highlights {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  font-size: 0.85rem;
}

.course-highlights li {
  padding: 0.3rem 0;
  color: var(--md-default-fg-color--light);
}

.course-link {
  display: block;
  width: 100%;
  margin-top: 1rem;
  padding: 0.6rem 1.5rem;
  background: var(--md-accent-fg-color);
  color: white !important;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  text-align: center;
  transition: opacity 0.2s;
  box-sizing: border-box;
}

.course-link:hover {
  opacity: 0.9;
}

.content-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.content-nav-card {
  background: linear-gradient(135deg, var(--md-accent-fg-color), var(--md-primary-fg-color));
  border-radius: 12px;
  padding: 2rem;
  color: white;
  text-align: center;
}

.content-nav-card h3 {
  margin-top: 0;
  color: white;
}

.content-nav-card p {
  color: rgba(255,255,255,0.9);
  margin-bottom: 1.5rem;
}

.content-nav-link {
  display: inline-block;
  padding: 0.7rem 2rem;
  background: white;
  color: var(--md-primary-fg-color) !important;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  transition: transform 0.2s;
}

.content-nav-link:hover {
  transform: scale(1.05);
}

.footer-note {
  text-align: center;
  margin: 3rem 0 2rem;
  color: var(--md-default-fg-color--light);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .courses-grid {
    grid-template-columns: 1fr;
  }
}