div.content {
  padding-left: 2em;
  padding-right: 2em;
}

@media print {
  a {
    color: black;
  }
}

a:hover {
    text-decoration: underline;
    color: #aa00aa;
    background-color: #ffffee;
}

body {
/*    font-family: Garamond, serif; */
/*    background-image: url('/sinintegral.png');*/
/*    background-repeat: repeat-x;*/
/*    background-position: bottom;*/
}

@media screen {
  body {
    color: black;
    background-color: #C9F;
  }

  ul.navbar {
/*    font-size: larger;*/
    list-style: none;
    background-color: #cccccc;
    border-bottom: solid black thin;
  }
  ul.navbar li {
    display: inline;
    margin-right: 1.5em;
  }
}

@media print {
  ul.navbar {
    display: none;
  }
  li.navbar {
    display: none;
  }
}

h1 {
  text-align: center;
}

.definition {
  background-color: #aaaaff
}

.postulate {
  background-color: #ffaaaa
}

.theorem {
  background-color: #aaffaa
}

.important {
  font-size: larger;
  font-weight: bold;
  background-color: yellow;
  color: black;
}