.debug {
  border: 1px dotted lightcoral;
  margin-bottom: 10px;
  min-height: 40px;
}

.debug div {
  margin: 5px;
  padding: 5px 10px;
  background: orangered;
  color: #fff;
  font-weight: 500;
  text-align: center;
}

.headline {
  margin-bottom: 50px;
}

.favicon {
  height: 22px;
  vertical-align: baseline;
  margin-right: 5px;
}

.three-columns {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-gap: 20px;
}

.toc {
  margin-top: 30px;
}

.toc h4 {
  margin-bottom: 20px;
}

.toc ol {
  columns: 2;
}

ol li {
  list-style-type: decimal;
  margin-left: 30px;
  padding: 3px;
}

.red {
  color: crimson;
}

.gist tr {
  border: 0;
}

.spinner {
  margin-right: 30px;
}

@media only screen and (max-width: 425px) {

  /* mobile */
  .wrapper {
    padding: 0 20px;
  }

  .button {
    margin-bottom: 10px;
  }

  .three-columns {
    grid-template-columns: 1fr;
  }
}