details {
  margin-bottom: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
}

h1, h2, summary, .spec-content { overflow-wrap: anywhere; }

summary {
  padding: 20px;
  background-color: #f7f7f7;
  cursor: pointer;
  outline: none;
}

.spec-content {
  padding: 20px;
}

h2 {
  color: #2c3e50;
  margin: 0;
}