body {
  background-color: #eeeeee;
}

header {
  margin: 1em 4em;
}

.post {
  background-color: white;
  margin: 1em 4em;
  box-shadow: .4em .4em .4em grey;
  border: 1px solid grey;
  padding: 1em;
}

.post:hover {
  background-color: #FFEEEE;
}