.article-body-content {
  font-family: 'Times New Roman', Times, serif;
  color: #374151;
  font-size: 1.125rem;
  line-height: 1.8;
}
.article-body-content h2 { font-size: 1.75rem; font-weight: 700; margin: 2rem 0 1rem; color: #111827; font-family: inherit; }
.article-body-content h3 { font-size: 1.4rem; font-weight: 700; margin: 1.5rem 0 0.75rem; color: #1f2937; font-family: inherit; }
.article-body-content p { margin-bottom: 1.5rem; }
.article-body-content ul { list-style-type: disc; margin-left: 1.5rem; margin-bottom: 1.5rem; }
.article-body-content ol { list-style-type: decimal; margin-left: 1.5rem; margin-bottom: 1.5rem; }
.article-body-content li { margin-bottom: 0.5rem; }
.article-body-content img { max-width: 100%; height: auto; border-radius: 0.75rem; margin: 2rem auto; display: block; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); }
.article-body-content strong, .article-body-content b { font-weight: 700; color: #111827; }
.article-body-content a { color: #dc2626; text-decoration: underline; text-underline-offset: 4px; }
.article-body-content a:hover { color: #b91c1c; }
.article-body-content blockquote { border-left: 4px solid #dc2626; padding-left: 1rem; font-style: italic; color: #4b5563; margin: 1.5rem 0; background: #fef2f2; padding: 1rem; border-radius: 0 0.5rem 0.5rem 0; }

.contact-buttons { position: fixed; bottom: 30px; left: 20px; display: flex; flex-direction: column; gap: 12px; z-index: 40; }
.btn-contact { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; box-shadow: 0 4px 20px rgba(0,0,0,0.15); transition: all 0.3s ease; position: relative; }
.btn-contact:hover { transform: translateY(-3px); }
.btn-zalo { background: #0068ff; }
.btn-messenger { background: #0084ff; }
.btn-phone { background: #dc2626; animation: pulse-red 2s infinite; }

@keyframes pulse-red {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 15px rgba(220, 38, 38, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); }
}

.sidebar-img-wrapper { border-radius: 0.5rem; }
.sidebar-img-wrapper img { transition: transform 0.5s ease; }
.other-article-item:hover .sidebar-img-wrapper img { transform: scale(1.1); }