html{margin:0px;padding:0px}body{margin:0px;padding:0px}#contents{padding:1em}#header{display:none}@media all and (min-width:840px){#header{display:block}#site{width:800px;margin:1em auto}#nav{margin-bottom:1em;border-radius:10px}#page{border-style:solid;border-color:#888;border-width:1px 3px 3px 1px;background-color:#fff}#contents{margin:1em 4em 4em 4em}h1.title{text-align:center}div.author{text-align:center}div.date{text-align:center}.left-wide{float:left}.right-wide{float:right}}