body { margin: 0; padding: 20px; background: #f9f9f9; } .article-container { background: white; border-radius: 12px; padding: 2rem; box-shadow: 0 2px 10px rgba(0,0,0,0.05); } h1 { font-size: 2rem; margin-top: 0; border-bottom: 2px solid #19...