body {
  font-family: Arial, monospace;
  max-width: 42rem;
  padding: 2rem;
  margin: auto;
  color: #111;
  background: #fff;
}

h1 {
  margin-bottom: 0;
}

h4 {
  margin-bottom: 6px;
}

.top {
  display: flex;
  align-items: center;
  gap: 12px;
}

h1 a,
h1 a:visited {
  color: #000;
  text-decoration: none;
}

a {
  color: #000;
}

a:hover {
  text-decoration: underline;
}

nav {
  margin-top: 6px;
}

hr {
  margin: 1.5rem 0;
  border: none;
  border-top: 1px solid #ddd;
}

.box {
  display: flex;
  flex-wrap: wrap;
}

.box > div {
  background: #f1f1f1;
  padding: 10px 14px;
  margin: 0 10px 10px 0;
}

pre {
  background: #f1f1f1;
  padding: 10px;
  overflow-x: auto;
  font-size: 0.9rem;
}

table {
  border-collapse: collapse;
  width: 100%;
}

td, th {
  border: 1px solid #ddd;
  text-align: left;
  padding: 6px 8px;
}

footer {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: #555;
}

@media screen and (max-width: 500px) {
  .box {
    flex-flow: row wrap;
  }
  .box > div {
    flex: 100%;
    margin-right: 0;
  }
}