/* Modules View Styles */
.modules-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.module-card {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
  cursor: pointer;
}

.module-card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.3);
}

.module-info h2 {
  color: white;
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.module-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 600px;
  line-height: 1.4;
}

.module-stats {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.module-progress-text {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
}

.module-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 0.5rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: background var(--transition-fast);
}

.module-btn:hover {
  background: var(--primary-hover);
}

/* Classes View Styles */
.classes-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 992px) {
  .classes-layout {
    flex-direction: row;
    align-items: flex-start;
  }
}

.video-container {
  flex: 1;
  background: black;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  border: 1px solid rgba(255,255,255,0.1);
}

.video-player-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
}

.video-player-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.current-class-info {
  padding: 2rem;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95) 0%, rgba(10, 15, 30, 0.98) 100%);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.current-class-info h2 {
  color: white;
  margin-bottom: 0.5rem;
}

.playlist-sidebar {
  width: 100%;
  background: rgba(15, 23, 42, 0.85);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

@media (min-width: 992px) {
  .playlist-sidebar {
    width: 350px;
    max-height: 600px;
  }
}

.playlist-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.2);
}

.playlist-header h3 {
  color: white;
  font-size: 1.1rem;
}

.playlist-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.playlist-item {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.playlist-item:hover {
  background: rgba(255,255,255,0.05);
}

.playlist-item.active {
  background: rgba(56, 189, 248, 0.15);
  border-left: 4px solid var(--primary);
}

.playlist-item.active .active-indicator {
  display: block !important;
}

.playlist-item-title {
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.95rem;
}

.playlist-item.active .playlist-item-title {
  color: var(--primary);
  font-weight: 600;
}

.playlist-item-duration {
  color: var(--text-muted);
  font-size: 0.8rem;
}