body {font-family: Arial, Helvetica, sans-serif; margin: 40px; line-height: 1.7; color:#222;}
h1,h2,h3 {color:#111;}
ul {margin-left:20px;}
.toc a {text-decoration:none; color:#0a4a8a;}
.section {margin-top:60px;}
img {max-width:100%; height:auto; margin:20px 0;}
table {border-collapse:collapse; width:100%;}
table, th, td {border:1px solid #999; padding:8px;}
hr {margin:50px 0;}