p.caption {
  color: #777;
  margin-top: 10px;
}
p code {
  white-space: inherit;
}
pre {
  word-break: normal;
  word-wrap: normal;
}
pre code {
  white-space: inherit;
}

.practice {
  margin: 1rem calc(-2px - 0.5em);
  padding: 1rem;
  border: 2px solid #eee;
  text-align: center;
  background: #9BD7DB 5px center/3em no-repeat;
  background-image: url("images/assignment.svg");
}

.program {
  margin: 1rem calc(-2px - 0.5em);
  padding: 1rem;
  border: 2px solid #eee;
  text-align: center;
  background: #70CDD3 5px center/3em no-repeat;
  background-image: url("images/laptop.svg");
}