body {
  font-family: monospace;
  font-size: 16px;
  max-width: 650px;
  margin: 50px auto;
  padding: 0 10px;
}
a {
  color: rgb(0, 0, 238);
  text-decoration: none;
}
summary {
  cursor: pointer;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
pre {
  overflow-x: auto;
  max-width: 100%;
  border: 1px solid #ccc;
  padding: 5px;
  background-color: #f8f8f8;
}
code {
  background-color: #f8f8f8;
}
table,
th,
td {
  border: 2px solid gray;
  border-collapse: collapse;
}
/* index.html: hanging indent sized to the date prefix */
ul.range li {
  padding-left: 10ch;
  text-indent: -10ch;
}
ul.year li {
  padding-left: 5ch;
  text-indent: -5ch;
}