* {
  font-family: Arial;
  }

#wrapper {
  height: 700px;
  align-items: center;
  justify-content: center;
}

h1 {
  text-align: center
}

#main, .entry {
  display: flex;
  border: 1px solid grey;
  margin: 5px;
  padding: 3px;
}

.inner {
  text-align: center;
  border: 1px dotted grey;
  margin: 5px;
}

.entry > .inner {
  width: 1800px;
}

.button {
  display: inline-block;
  border: 1px double grey;
  margin: 3px;
  text-align: center;
}