.btn span {
  display: inline-block;
  padding: 0.5em;
  border: 2px solid #7fd0ed;
  border-radius: 4px;
}
.btn {
  border-radius: 4px;
  background-color: #fff;
  padding: 2px;
  border: none;
}
.btn:hover, .btn:focus {
  cursor: pointer;
  outline: none;
  background-color: #f1fafd;
}
.btn:active {
  outline: 2px dashed #acdbf5;
}
.btn.selected span,
.btn:active span {
  background-color: #7fd0ed;
  border: 2px solid #acdbf5;
  color: #fff;
}