#contents {
  width: 90%;
  margin: auto;
  max-width: 21cm;
}

#doi {
  float: right;
  margin: 10px;
  border-radius: 50%;
  border: 3px solid grey;
  border-top-color: black;
  border-left-color: red;
  border-right-color: red;
  border-bottom-color: gold;
  height: 25vw;
  max-height: 300px;
}

h1 {
  color: white;
  background-image: linear-gradient(to right, #c00000, white);
  text-align: left;
  padding-left: 30px;
  padding-right: 30px;
  font-size: 29px;
}

h2 {
  margin-top: 100px;
  color: white;
  background-image: linear-gradient(to right, #c00000, white);
  text-align: left;
  padding-left: 30px;
  padding-right: 30px;
  padding-top: 4px;
}

h3 {
  margin-bottom: -80px;
  color: darkgreen;
}

#footer-grid h2 {
  background-image: none;
  margin-top: 2%;
}

.indent {
  margin-left: 15px;
}

#contents img {
  margin-top: 30px;
}

#house {
  display: block;
  margin: auto;
}