body {
  font-family: sans-serif;
  background-color: #e87f1a;
}
#mainSubtitle {
  font-style: italic;
  margin-top: 0px;
  padding-bottom: 0px;
}
h1 {
  margin-bottom: 0px;
  padding-bottom: 0px;
}
.active{
  background-color: red;
}
nav ul {
  list-style-type: none;
  margin: 0;
  margin-left: -28px;
  padding: 0;
  overflow: hidden;
  background-color: #333333;
  position: fixed;
  top: 0;
  width: 100%;
  border-style: solid;
  border-color: black;
  margin-bottom: 16px;
}
nav ul li {
  float: left;
  border-right: 1px solid black;
  font-size: 16px;
  font-weight: bold;
}
nav ul li:last-child {
  border-right: none;
}
nav ul li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}
nav ul li a:hover {
  background-color: black;
}
body:not(nav) {
  padding:20px;
  margin-top:30px;
  height:1500px;
}
img {
  width:calc(250px + 15vw);
}
iframe {
  width: 74.67vw;
  height:42vw;
}
p,
ul:not(nav),
h4 {
  font-size: 22px;
}