ol { list-style-type: none; counter-reset: item; margin: 0; padding: 0; }
ol > li { display: table; counter-increment: item; margin-bottom: 0.6em; }
ol > li:before { content: counters(item, ".") ". "; display: table-cell; padding-right: 0.6em; }
li ol > li { margin: 0; }
li ol > li:before { content: counters(item, ".") " "; }