body header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  align-items: center;
  background: #ededef;
  padding: 1px 20px;
  opacity: 0.9;
  color: #7017ef;
}
body header #greeting, body header #header-left {
  flex: 0 0 20%;
}
body header #links {
  padding: 20px;
}
body header #links a {
  border: 1px solid #817eaf;
  border-radius: 50px;
  padding: 10px 30px;
  margin: 30px;
  text-decoration: none;
}
body header #links a:hover {
  text-decoration: underline;
  color: #a24aff;
}
body header #header-left {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
body header #header-left > * {
  margin: 0 20px;
}