body {
  font-family: sans-serif;
  margin: 2rem;
  background: #f7f7f7;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

.listing {
  border: 1px solid #ccc;
  background: white;
  padding: 1rem;
  margin-bottom: 1rem;
  border-left: 8px solid gray;
}

.available {
  border-left-color: green;
}

.rented {
  border-left-color: red;
}

.openhouse {
  border-left-color: orange;
}