.article-navigator-wrapper {
  display: flex;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Left Sidebar Styles */
.article-sidebar {
  width: 30%;
  min-width: 300px;
}

.sidebar-sticky {
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  background: #fff;
  border: 1px solid #e1e5e9;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.sidebar-title {
  margin: 0 0 20px 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: #1a202c;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 10px;
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.post-item {
  display: flex;
  gap: 12px;
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.post-item:hover {
  background-color: #f7fafc;
  border-color: #cbd5e0;
  transform: translateY(-1px);
}

.post-item.active {
  background-color: #ebf8ff;
  border-color: black;
  box-shadow: 0 2px 8px rgba(49, 130, 206, 0.15);
}

.post-image {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  border-radius: 6px;
  overflow: hidden;
}

.post-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.post-info {
  flex: 1;
  min-width: 0;
}

.post-title {
  margin: 0 0 5px 0;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.3;
  color: #2d3748;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-meta {
  font-size: 0.75rem;
  color: #718096;
}

/* Right Content Area Styles */
.article-content {
  width: 70%;
  min-width: 0;
}

.categories-filter {
  background: #fff;
  border: 1px solid #e1e5e9;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.categories-filter h3 {
  margin: 0 0 15px 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: #1a202c;
}

.category-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.category-btn {
    background: #8b8d90;
    border: 1px solid #8b8d90;
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: #ffffff;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex
;
    align-items: center;
    gap: 5px;
}

.category-btn:hover {
  background: #edf2f7;
  border-color: #cbd5e0;
  transform: translateY(-1px);
}

.category-btn.active {
  background: black;
  border-color: black;
  color: white;
}

.post-count {
  font-size: 0.75rem;
  opacity: 0.8;
}

/* Article Display Styles */
.article-display {
  background: #fff;
  border: 1px solid #e1e5e9;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.single-post-display {
  padding: 30px;
}

.post-featured-image {
  margin-bottom: 25px;
  border-radius: 8px;
  overflow: hidden;
}

.post-featured-image img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
}

.post-header {
  margin-bottom: 25px;
  padding-bottom: 20px;
  border-bottom: 1px solid #e2e8f0;
}

.single-post-display .post-title {
  margin: 0 0 15px 0;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: #1a202c;
}

.single-post-display .post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  font-size: 0.875rem;
  color: #718096;
}

.post-categories {
  display: flex;
  gap: 8px;
}

.category-tag {
  background: #edf2f7;
  color: #4a5568;
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

.post-content {
  line-height: 1.7;
  color: #2d3748;
  font-size: 1rem;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  margin: 1.5em 0 0.5em 0;
  font-weight: 600;
  color: #1a202c;
}

.post-content p {
  margin-bottom: 1em;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 1em 0;
}

/* Loading Spinner */
.loading-spinner {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9999;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid black;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* No Posts States */
.no-posts,
.no-posts-sidebar {
  text-align: center;
  padding: 40px 20px;
  color: #718096;
}

.no-posts h3 {
  margin-bottom: 10px;
  color: #4a5568;
}

/* Responsive Design */
@media (max-width: 768px) {
  .article-navigator-wrapper {
    flex-direction: column;
    padding: 10px;
  }

  .article-sidebar,
  .article-content {
    width: 100%;
  }

  .sidebar-sticky {
    position: static;
    max-height: none;
    margin-bottom: 20px;
  }

  .category-buttons {
    justify-content: center;
  }

  .single-post-display {
    padding: 20px;
  }

  .single-post-display .post-title {
    font-size: 1.5rem;
  }

  .single-post-display .post-meta {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .post-item {
    flex-direction: column;
    text-align: center;
  }

  .post-image {
    width: 100%;
    height: 120px;
    align-self: center;
  }

  .category-btn {
    font-size: 0.8rem;
    padding: 6px 12px;
  }
}