body {
  background-color: DodgerBlue;
  font-size: x-large;
  display: flex;
  flex-direction: column;
  align-items:center;
}
.header {
  width: 80%;
  display: flex;
  justify-content: center;
}

h1 {
  border: 1px solid gray;
  padding: 1%;
  background-color: rgb(150, 200, 220);
  box-shadow: 5px 5px 0px 0px;
}

.githublink {
  position: absolute;
  right: 5vw;
  border: 1px solid black;
  box-shadow: 5px 5px 0px 0px;
  background-color: rgb(150, 200, 220);
  padding: 10px;
  font: bold min(30px, 2vw) Times;
}

.githublink:hover {
  background-color: tomato;
}

ul {
  list-style-type: none;
  padding: 0;
  border: 1px solid #ddd;
  width: 40%;
}

ul li {
  padding: 8px 16px;
  border-bottom: 1px solid #ddd;
  background-color: MediumSeaGreen;
}

ul li:hover {
  background-color: tomato;
}

ul li:last-child {
  border-bottom: none
}