-종류 address, article, aside, audio, blockquote, canvas, dd, div, dl, fieldset, figcaption, figure, footer, form, h1, h2, h3, h4, h5, h6, header, hgroup, hr, noscript, ol, output, p, pre, section, table, ul, video -특징 1. 한 줄 전부 사용한다. block 요소1 block 요소2 block 요소3 #warp{ background: black; width: 500px; margin: 100px auto; } #warp h1:nth-child(1){ background: crimson; } #warp h1:nth-child(2){ back..