body {
  margin: 0 auto;
}
html {
  font-family: Arial;
}
h1 {
  font-weight: 100;
  margin-left: 100px;
  font-size: 14px;
  color: #C1383A;
  margin-bottom: 50px;
}
p {
  margin-left: 60px;
  font-size: 12px;
  width: 580px;
}
li {
  list-style: none;
}
#koord_sys {
  background-image: url(../img/hormones_curves_de.jpg);
  background-repeat: no-repeat;
  width: 730px;
  height: 340px;
}
img.koord-image {
  left: 35px;
  position: absolute;
  top: 135px;
  display: none;
}
div.info_text p {
  display: none;
}
p#info_text {
  display: block;
}
ul.nav-button {
  display: block;
  margin-bottom: 2em;
  margin-left: 7px;
  margin-top: -28px;
  padding: 0;
}
ul.nav-button li {
  display: inline-block;
  font-size: 16px;
  padding-right: 10px;
  text-align: center;
  width: 105px;
}
ul.nav-button li a {
  text-decoration: none;
  width: inherit;
  display: inline;
  padding-left: 42px;
  padding-right: 44px;
  width: 50px;
}