.spoiler {
  border: 1px solid gray;
  background-color: #f5f5f599;
  border-radius: 5px;
  margin-top: 5px;
  margin-bottom: 5px;
}

.spoiler-toggle::before {
  content: "►";
  vertical-align: bottom;
}

.spoiler-toggle.expanded::before {
  content: "▼";
  vertical-align: bottom;
}

.spoiler-toggle {
  font-weight: bold;
  padding: 5px;
  font-size: 12px;
  cursor: pointer;
  user-select: none;
}

.spoiler-text {
  padding: 5px;
}