body {
    background-color: rgb(243, 243, 243);
    margin-left: 150px;
    margin-right: 350px;
}

h1 {
  font-family: Calibri, Arial;
}

h2 {
  font-family: Calibri, Arial;
}
h3 {
  font-family: Calibri, Arial;
}
p {
  font-family: Calibri, Arial;
}

pre {
  font-family: Calibri, Arial;
}