body {
               color: black;
               /*   background-color: #e5e5e5;*/
               background-color: #ffffff;
               /*background-color: beige;*/
               margin-top: 2em;
               margin-bottom: 2em;
               /* margin-left: 8%;
               margin-right: 8%; */
               }

               @media screen {
               body {
               margin-left: 8%;
               margin-right: 8%;
               }
               }

               @media print {
               body {
               text-align: justify;
               }
               }

               @media print {
               a:link, a:visited {
               text-decoration: none;
               color: black;
               }
               }

               /* @media print {
               p {
               text-indent: 2em;
               margin-top: 1ex;
               margin-bottom: 0;
               }

               } */

               h1,h2,h3,h4,h5,h6 {
               margin-top: .8em;
               margin-bottom: .2em;  /* ?? */
               }

               .title {
               font-size: 200%;
               font-weight: normal;
               margin-top: 2.8em;
               text-align: center;
               }

               .partheading {
               font-size: 100%;
               }

               .chapterheading {
               font-size: 100%;
               }

               .beginchapter,.beginsection {
               font-family: sans-serif;
               }

               .beginchapter {
               margin-top: 1.8em;
               font-size: 150%;
               }

               .beginsection {
               margin-top: 1.8em;
               font-size: 110%;
               }

               .tiny {
               font-size: 40%;
               }

               .scriptsize {
               font-size: 60%;
               }

               .footnotesize {
               font-size: 75%;
               }

               .small {
               font-size: 90%;
               }

               .normalsize {
               font-size: 100%;
               }

               .large {
               font-size: 120%;
               }

               .largecap {
               font-size: 150%;
               }

               .largeup {
               font-size: 200%;
               }

               .huge {
               font-size: 300%;
               }

               .hugecap {
               font-size: 350%;
               }

               p.noindent {
               text-indent: 0;
               margin-top: 0;
               }

               p.nopadding {
               margin-top: 0;
               }

               pre {
               overflow: auto;
               margin-left: 2em;
               background-color: #f5f5f5;
               }

               blockquote {
               background-color: #f0e0e0;
               margin-top: 2pt;
               margin-bottom: 2pt;
               margin-left: 2em;
               }

               .smallskip {
               margin-top: 2pt;
               margin-bottom: 2pt;
               min-height: 4pt;
               }

               .medskip {
               margin-top: 3pt;
               margin-bottom: 3pt;
               min-height: 7pt;
               /*margin-top: 1.6em;
               margin-bottom: 2.4em;
               margin-top: 1em;
               margin-bottom: 1.5em; */
               /* top and bottom have to be different so successive \...skips cause more spacing? */
               }

               .bigskip {
               margin-top: 4pt;
               margin-bottom: 4pt;
               min-height: 13pt;
               /*margin-top: 2.8em;
               margin-bottom: 3.4em;
               margin-top: 2.4em;
               margin-bottom: 1.6em; */
               }

               ol {
               list-style-type: decimal;
               }

               ol ol {
               list-style-type: lower-alpha;
               }

               ol ol ol {
               list-style-type: lower-roman;
               }

               ol ol ol ol {
               list-style-type: upper-alpha;
               }

               tt i {
               font-family: serif;
               }

               .verbatim em {
               font-family: serif;
               }

               /*
               .verbatim {
               color: #4d0000;
               }
               */

               .scheme em {
               color: black;
               font-family: serif;
               }

               .scheme             {color: #993333} /* background punctuation */
               .scheme  .selfeval  {color: #006600}
               .scheme  .keyword   {color: #660000; font-weight: bold}
               .scheme  .builtin   {color: #660000}
               .scheme  .global    {color: #660066}
               .scheme  .variable  {color: #000066}
               .scheme  .comment   {color: #006666; font-style: oblique}

               .schemeresponse {
               color: #006600;
               }

               a:hover {
               text-decoration: none;
               background-color: yellow;
               }

               .navigation {
               color: #993300;
               text-align: right;
               font-size: medium;
               font-style: italic;
               }

               @media print {
               .navigation {
               display: none;
               }
               }

               .disable {
               /* color: #e5e5e5; */
               color: gray;
               }

               .smallcaps {
               font-size: 75%;
               }

               .smallprint {
               color: gray;
               font-size: 75%;
               text-align: right;
               }

               /*
               .smallprint hr {
               text-align: left;
               width: 40%;
               }
               */

               .footnoterule {
               text-align: left;
               width: 40%;
               }

               @media print {
               .footnoterule {
               margin-top: 2em;
               }
               }

               .colophon {
               color: gray;
               font-size: 80%;
               font-style: italic;
               text-align: right;
               margin-top: 1em;
               }

               @media print {
               .colophon .advertisement {
               display: none;
               }
               }

               .colophon a {
               color: gray;
               text-decoration: none;
               }