body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background-color: #29434E;
  color: #F5F5DC;
  padding: 5px;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

nav li {
  display:   
 inline-block;
  margin-right: 10px;
}

.introduction img {
  width: 200px;
  height: 200px;
  float: left;
  margin-right: 20px;
  padding-left:10px;
  padding-right:10px;
}

.publications ul {
  padding-left: 40px;
}