/* Courses Tabs */
.tabs-container {
  margin-top: var(--spacing-6);
}

.tab-list {
  display: flex;
  gap: var(--spacing-2);
  border-bottom: 2px solid var(--border-color);
  margin-bottom: var(--spacing-5);
  overflow-x: auto;
  white-space: nowrap;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: var(--spacing-3) var(--spacing-5);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
  margin-bottom: -2px; /* Overlap border */
}

.tab-btn:hover {
  color: var(--primary-color);
}

.tab-btn[aria-selected="true"] {
  color: var(--primary-color);
}

.tab-btn[aria-selected="true"]::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
}

/* Course Grid in Tabs */
.tab-panel {
  display: none;
}
.tab-panel.active {
  display: block;
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-5);
}

.course-detail-btn {
  width: 100%;
  margin-bottom: var(--spacing-2);
}

/* Modal/Expanded Details */
.course-meta {
  display: flex;
  justify-content: space-between;
  margin: var(--spacing-2) 0;
  padding: var(--spacing-2);
  background-color: var(--bg-color);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}
.course-meta span {
  font-weight: 600;
  color: var(--primary-color);
}

.course-extra {
  margin-top: var(--spacing-3);
  padding-top: var(--spacing-3);
  border-top: 1px solid var(--border-color);
}

.course-extra h4 {
  font-size: 1rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-1);
}
.course-extra p {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-2);
  color: var(--text-muted);
}