.article-section {
  padding: 50px 0 70px;
}
.article-main {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}
.article-content {
  flex: 1 1 65%;
  min-width: 300px;
}
.article-sidebar {
  flex: 1 1 30%;
  min-width: 280px;
}
.article-header h1 {
  font-size: 2.5em;
  text-align: left;
  margin-bottom: 0.6em;
  color: var(--text-dark);
}
.article-meta {
  font-size: 0.9em;
  color: var(--text-muted);
  margin-bottom: 25px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}
.article-featured-image {
  width: 100%;
  height: auto;
  margin: 25px 0;
  border: 1px solid var(--border-color);
  box-shadow: 0 5px 15px rgba(0,90,120,0.1);
}
.article-content h2 {
  font-size: 1.8em;
  text-align: left;
  margin: 30px 0 15px 0;
  color: var(--text-dark);
}
.article-content h3 {
  font-size: 1.4em;
  margin: 25px 0 10px 0;
  color: var(--text-dark);
}
.article-content p {
  font-size: 1em;
  line-height: 1.8;
  margin-bottom: 15px;
  color: var(--text-dark);
}
.article-content ul, .article-content ol {
  margin: 15px 0;
  padding-left: 25px;
}
.article-content li {
  margin-bottom: 8px;
  line-height: 1.6;
  color: var(--text-dark);
}
.highlight-box {
  background-color: var(--bg-alt);
  border: 2px solid var(--brand-color);
  border-radius: 8px;
  padding: 25px;
  margin: 25px 0;
}
.highlight-box h3 {
  color: var(--brand-color);
  margin-top: 0;
  margin-bottom: 15px;
}
.warning-box {
  background-color: #fff3cd;
  border: 2px solid #ffc107;
  border-radius: 8px;
  padding: 20px;
  margin: 25px 0;
}
.warning-box strong {
  color: #856404;
}
.sidebar-box {
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 25px;
  margin-bottom: 30px;
  box-shadow: 0 4px 12px rgba(0, 90, 120, 0.08);
}
.sidebar-box h3 {
  color: var(--text-dark);
  margin-bottom: 15px;
  font-size: 1.3em;
}
.sidebar-links {
  list-style: none;
  padding: 0;
}
.sidebar-links li {
  margin-bottom: 12px;
}
.sidebar-links a {
  color: var(--brand-color);
  text-decoration: none;
  font-size: 0.95em;
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
  transition: color 0.3s ease;
}
.sidebar-links a:hover {
  color: var(--brand-color-darker);
}
@media (max-width: 992px) {
  .article-main {
      gap: 30px;
  }
  .article-content { flex-basis: 100%; }
  .article-sidebar { flex-basis: 100%; }
}
@media (max-width: 768px) {
  .article-header h1 { font-size: 2em; }
  .article-content h2 { font-size: 1.5em; }
}