.box {
  margin-bottom: 1.5rem;
  border: 5px solid #cccccc;
  padding: 1em;
}

.box__title {
  margin: 0;
}

.box:focus, .box:hover, .box.is-focus, .box--is-focus {
  border-color: #000;
}

.box--highlight {
  border-color: #0072b9;
}