body {
  margin: 0;
}

header {
  width: 100%;
  display: flex;
  padding: 1em 0;
  align-items: center;
  justify-content: space-evenly;
  background: purple;
}

a {
  color: white;
}

.post {
  color: darkgreen;
}

.top-post {
  padding: 15px;
  border: 1px solid #d6e9c6;
  border-radius: 4px;
  color: #3c763d;
  background-color: #dff0d8;
}