body{background-image: url(figure/background.jpg);}

h1,h2,h3,h4{
font-family: monospace;
font-size: 1em;
color: #404040;
background-color: inherit;
font-weight:normal;
}

h3{ margin-top: 3em;}
dl{ margin: 2em 0em;}
dt{ margin-top: 2em;}

hr{
border-color: #000000;
border-style: solid none none none;
border-width: 1px;
}

.header{
margin-top:10px;
padding: 1em 0em;
background-image: url("figure/header_border.png");
border-style: none;
background-repeat: no-repeat;
height: 55px;
}

.div_chapter{
height: 1px;
background-image: url("figure/border.png");
border-style: none;
}

pre{
line-height: 100%;
margin: 3em;
}

.bold{ font-weight:bold; font-family: verdana ,monospace;}

.toc_head{
height: 31px;
background-image: url("./figure/contents_bg.png");
background-repeat: no-repeat;
padding-left: 2em;
margin-top: 2em;
}

.subhead{
height: 25px;
width: 15em;
background-image: url("./figure/chapter_border.png");
background-repeat: no-repeat;
padding-left: 2em;
margin-top: 2em;
}

.contents{
margin-left:110px;
line-height: 160%;
max-width: 600px;
color: #404040;
background-color: #FFFFFF;
font-family: monospace;
}

.head{ text-align: center; }

.writ{ text-align: right; }

.comment{
margin-left: 5em;
margin-bottom: 4em;
}