/* 1. Element Name Selector (Applies to all elements) */ body { font-family: Arial, sans-serif; line-height: 1.6; margin: 20px; /* Adds some space around the content */ background-color: #f0f0f0; /* Light gray background */ } /* 2. ID Selector (Applies specifically to the element with id="main-title", which is the

) / #main-title { color: #8b0000; / Dark Red - representing the Red node color / border-bottom: 3px solid black; / A black line beneath, representing the Black nodes/depth / padding-bottom: 10px; margin-bottom: 20px; } / 3. Class Name Selector (Applies to all elements with class="list-rules", which is the
) / .list-rules { list-style-type: square; background-color: #ffffff; / White background for the list / padding: 20px; border-left: 5px solid #000000; / Black border on the left */ }