:root {
  --text-default: #333;
  --text-light: #777;
  --background: rgb(250, 250, 247);
}

html {
  scroll-behavior: smooth;
}

body {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  font-family: sans-serif;
  font-feature-settings: "palt";
  margin: 0;
  color: var(--text-default);
  background-color: var(--background);
  font-size: 1.25em;
}

article {
  width: calc(100% - 2em);
  max-width: 768px;
  margin: 0 auto;
}

h1,
h2,
h3,
h4 {
  margin: 3rem 0 2rem 0;
  color: var(--text-default);
}

p {
  line-height: 1.75rem;
}

p:lang(ja_JP) {
  font-size: 0.85em;
  line-height: 1.75rem;
}

li {
  margin: 0.5em 0;
}

img {
  width: 100%;
}

dt,
dd {
  margin: 0.5em 0;
}

dt {
  font-family: monospace;
  margin-top: 1.33em;
  font-weight: bold;
}

dd {
  font-size: 0.9em;
  color: var(--text-light);
}

code {
  display: block;
  color: #aaa;
  font-size: 0.9em;
  line-height: 1.5em;
  background-color: #333;
  font-family: monospace;
  padding: 1.66em;
}

nav {
  display: block;
  width: fit-content;
  margin: 0 auto;
  padding: 0.66em 0;
  color: var(--text-light);
}

nav a:not(:last-of-type)::after {
  display: inline-block;
  content: "|";
  padding: 0 1em;
  color: #aaa;
}

nav a,
nav a:visited {
  color: var(--text-default);
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

footer {
  display: block;
  color: var(--text-light);
  font-size: 0.8em;
  width: fit-content;
  margin: 1em auto;
  padding: 3em 0 2em 0;
}