[DNSB]

You may also want to look at where you are using margin-left: auto; and margin-right: auto; for centering. Quite a few renderers especially those based on Adobe's ADE/RMSDK renderers will not work. A simple text-align: center; will work. I would also dump the text-align: justify to allow the reader to choose whether they want to justify or left align text. A quick and dirty pass at this:

Spoiler:

@font-face {
  font-family: "Tahoma";
  font-style: normal;
  font-weight: normal;
  src: url("../Fonts/tahoma.ttf");
}

@font-face {
  font-family: "Verdana";
  font-style: normal;
  font-weight: normal;
  src: url("../Fonts/verdana.ttf");
}

@font-face {
  font-family: "SmallCaps";
  font-weight: bold;
  font-style: normal;
  font-variant: small-caps;
  src: url("../Fonts/Fontin-SmallCaps.otf");
}

body {
  display: block;
  font-size: 1em;
  line-height: 1.1;
  margin: 0 0 0 0;
  padding: 0 0 0 0;
  text-indent: 0;
  widows: 1;
  orphans: 1;
}

p {
  margin: 0 0 0 0;
  padding: 0.2em 0 0 0;
}

a:link {
  color: #003399;
  text-decoration: none;
}

a:visited {
  color: #003399;
  text-decoration: none;
}

a:hover {
  color: #003399;
  text-decoration: none;
  background-color: #dddddd;
}

a:active {
  color: #003399;
  text-decoration: none;
}

p.margem {
  margin: .75em 0 0;
}

div.divisa {
  margin-top: 30%;
}

.poema1 {
  display: block;
  font-family: Verdana, sans-serif;
  text-align: left;
  margin: 0 1em 0 3em;
  text-indent: -2em;
}

.poema2 {
  display: block;
  font-family: Verdana, sans-serif;
  text-align: left;
  text-indent: 2em;
  padding: 0;
}

.prosa1 {
  display: block;
  font-family: Verdana, sans-serif;
  line-height: 1.5em;
  padding: 0;
}

.prosa2 {
  display: block;
  font-family: Verdana, sans-serif;
  text-indent: 1em;
  line-height: 1.5em;
  padding: 0;
}

.quote {
  padding: 1em;
  border-left: .3em solid;
  background-color: #d3d3d3;
}

.center {
  display: block;
  background-color: #fff;
  padding: .7em;
  border: .2em ridge #ccc;
  border-radius: 20px;
  width: 60%;
  text-align: center;
}

img.vinheta {
  display: block;
  float: left;
  margin: 0 10px 05px 10px;
}

.centro {
  text-align: center;
  margin-top: 3%;
  display: block;
}

.rodape {
  margin-bottom: 5%;
  display: block;
  text-align: center;
}

p.rosto {
  margin-top: 10%;
  line-height: 2em;
  font-family: 'SmallCaps', sans-serif;
  font-size: 1.6em;
  font-weight: bold;
  text-align: center;
}

.titulo {
  font-family: 'SmallCaps', sans-serif;
  font-size: 1.4em;
  font-weight: bold;
  font-variant: small-caps;
  text-align: left;
  margin-top: 1em;
  margin-bottom: 1em;
}

.reduz {
  margin-bottom: 1em;
  text-align: center;
  display: block;
  padding: 0;
  border: .5em ridge #ccc;
  border-radius: 20px;
  width: 50%;
}