h1, h2, h3, h4 color: #222; h1 font-size: 2em; margin-bottom: 0.5em; h2 font-size: 1.75em; margin-top: 1.5em; h3 font-size: 1.5em; margin-top: 1.2em; h4 font-size: 1.2em; margin-top: 1em; p margin-bottom: 1em; ul, ol margin-left: 20px; margin-bottom: 1em; table border-collapse: