details {
    border: 1px solid #eee;
    border-radius: 4px;
    padding: .5em .5em 0;
    width: inherit;
}

summary {
    font-size: 13px;
    margin: -.5em -.5em 0;
    padding: .5em;
}

.spoiler {
  color: #aaa;
  background-color: #aaa;
}

.spoiler:hover {
  color: #111;
  background-color:white;
  }