div.caution {
   background: #fffff0;
   box-shadow: 0 0 5px rgba(0.2, 0.2, 0, 0.1);
   border-radius: 3px;
   color: #403020;
   height: auto;
   margin: 1em 0;
   padding: 1em 1em 1em 40px;
   position: relative;
}

div.caution::before {
   position: absolute;
   top: 0;
   left: 0;
   height: 100%;
   width: 40px;
   text-align: center;
   display: block;
   content: "!";
   font-size: 2em;
   font-weight: bold;
   color: #aa8800;
   padding: 0;
}

div.caution p code{
   background: #f8f8ea;
   color: #404020;
}

pre > code {
   font-size: 0.95em;
}

.book .book-body .page-wrapper .page-inner {
  max-width: 900px;
  min-width: 600px;
}