The wordpress style-sheet can be a little bit daunting/confusing especially if you’re new to wordpress. It’s broken up into multiple sections with repeating blocks of elements.
I’ve stripped it down and this is the CSS I use when starting with a wordpress site.
It’s valid CSS but take it with a grain of salt as it’s not for everyone. It’s helped me and I hope it helps you!
body{font-size:62.5%;}
.narrowcolumn{float:left;padding:0 0 15px 0;margin:10px 0 0 0;clear:none;width:100%}
.post{margin:0 0 40px;text-align:justify}hr{display:none;}
.narrowcolumn .postmetadata{padding-top:5px}
.postmetadata,.clear{clear:both}
img.centered{display:block;margin-left:auto;margin-right:auto}
img.alignright{padding:4px;margin:0 0 2px 7px;display:inline}
img.alignleft{padding:4px;margin:0 7px 2px 0;display:inline}
.alignright,.alignleft{float:left}
html>body .entry ul{margin-left:0px;padding:0 0 0 30px;list-style:none;padding-left:10px;text-indent:-10px}
html>body .entry li{margin:7px 0 8px 10px}
.entry ol{padding:0 0 0 35px;margin:0}
.entry ol li{margin:0;padding:0}
.postmetadata ul,
.postmetadata li{display:inline;list-style-image:none}
.alt{margin:0;padding:10px}
.commentlist{padding:0;text-align:justify}
.commentlist li{margin:15px 0 10px;padding:5px 5px 10px 10px;list-style:none}
.commentlist li ul li{margin-right:-5px;margin-left:10px}
.commentlist p{margin:10px 5px 10px 0}.children{padding:0}
.commentmetadata{margin:0;display:block}
.thread-alt{background-color:#f8f8f8}
.thread-even{background-color:white}
.depth-1{border:1px solid #ddd}
.even,
.alt{border-left:1px solid #ddd}
.navigation{display:block;text-align:center;margin-top:10px;margin-bottom:60px}
.aligncenter,div.aligncenter{display:block;margin-left:auto;margin-right:auto}
.wp-caption{border:1px solid #ddd;text-align:center;background-color:#f3f3f3;padding-top:4px;margin:10px;}
.wp-caption img{margin:0;padding:0;border:0 none}
.wp-caption p.wp-caption-text{font-size:11px;line-height:17px;padding:0 4px 5px;margin:0}
