/* YouTube Learning Specific Styles */
.youtube-header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem 0;
}

.header-content {
  max-width: 600px;
  margin: 0 auto;
}

.main-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #1e3a8a;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.main-title i {
  color: #4f46e5;
}

.subtitle {
  font-size: 1.2rem;
  color: #6b7280;
  line-height: 1.6;
}

/* Search Section */
.search-section {
  margin-bottom: 2rem;
}

.search-container {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border: 1px solid #e5e7eb;
}

.search-box {
  margin-bottom: 1.5rem;
}

.search-input-group {
  display: flex;
  gap: 1rem;
  align-items: stretch;
}

.search-input {
  flex: 1;
  padding: 1rem 1.5rem;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: white;
}

.search-input:focus {
  outline: none;
  border-color: #4f46e5;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-input::placeholder {
  color: #9ca3af;
}

.search-btn {
  background: #4f46e5;
  color: white;
  border: none;
  border-radius: 12px;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.search-btn:hover {
  background: #4338ca;
  transform: translateY(-2px);
}

.search-btn:active {
  transform: translateY(0);
}

/* Suggestions */
.suggestions-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #374151;
  margin-bottom: 1rem;
}

.suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.suggestion-chip {
  padding: 0.75rem 1.5rem;
  border: 1px solid #d1d5db;
  border-radius: 25px;
  background: #f9fafb;
  color: #374151;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
  font-weight: 500;
}

.suggestion-chip:hover {
  background: #4f46e5;
  color: white;
  border-color: #4f46e5;
  transform: translateY(-2px);
}

/* Status Messages */
.status-message {
  margin-bottom: 2rem;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  text-align: center;
  font-weight: 500;
}

.status-message.success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.status-message.error {
  background: #fee2e2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.status-message.info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

/* Loading Spinner */
.loading-spinner {
  text-align: center;
  padding: 3rem;
  background: white;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  margin-bottom: 2rem;
}

.spinner {
  border: 4px solid #f3f4f6;
  border-top: 4px solid #4f46e5;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-spinner p {
  color: #6b7280;
  font-size: 1.1rem;
}

/* Video Grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.video-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  border: 1px solid #e5e7eb;
  position: relative;
}

.video-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.video-thumbnail {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: #f3f4f6;
}

.video-thumbnail iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.educational-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #10b981;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.video-content {
  padding: 1.5rem;
}

.video-title {
  font-weight: 600;
  margin-bottom: 0.75rem;
  line-height: 1.4;
  color: #1f2937;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.video-channel {
  color: #6b7280;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.video-date {
  color: #9ca3af;
  font-size: 0.8rem;
}

.video-description {
  color: #6b7280;
  font-size: 0.9rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Error State */
.error-state {
  text-align: center;
  padding: 3rem;
  background: white;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  margin-bottom: 2rem;
}

.error-content {
  max-width: 400px;
  margin: 0 auto;
}

.error-icon {
  font-size: 3rem;
  color: #dc2626;
  margin-bottom: 1rem;
}

.error-title {
  font-size: 1.5rem;
  color: #1f2937;
  margin-bottom: 1rem;
}

.error-description {
  color: #6b7280;
  margin-bottom: 1.5rem;
}

.retry-btn {
  background: #4f46e5;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 auto;
}

.retry-btn:hover {
  background: #4338ca;
}

/* No Results State */
.no-results {
  text-align: center;
  padding: 3rem;
  background: white;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  grid-column: 1 / -1;
}

.no-results i {
  font-size: 3rem;
  color: #9ca3af;
  margin-bottom: 1rem;
}

.no-results h3 {
  color: #374151;
  margin-bottom: 1rem;
}

.no-results p {
  color: #6b7280;
  margin-bottom: 1.5rem;
}

/* Utility Classes */
.hidden {
  display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
  .main-title {
    font-size: 2rem;
    flex-direction: column;
    gap: 0.5rem;
  }

  .search-container {
    padding: 1.5rem;
  }

  .search-input-group {
    flex-direction: column;
  }

  .video-grid {
    grid-template-columns: 1fr;
  }

  .suggestion-chips {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .youtube-header {
    margin-bottom: 2rem;
    padding: 1rem 0;
  }

  .search-container {
    padding: 1rem;
  }

  .video-content {
    padding: 1rem;
  }

  .video-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}