html {
  --max-width: 680px;
  font-size: 100%;
  line-height: 1.45;
}
ul {
  padding-inline-start: 1.5em;
  padding-inline-end: 0;
}
li,
li ul {
  margin-top: 0.35em;
  margin-bottom: 0.35em;
}
hr {
  width: 100%;
  height: 0;
  background: none;
  border: none;
  border-top: 0.1em solid;
  margin: 2em 0;
}
main hr {
  width: 5em;
  margin: 2.5em auto;
}
main p.sep {
  font-size: 1.5em;
  text-align: center;
  margin: 0.5em 0;
}
h1 {
  font-weight: 900;
  font-size: 2rem;
  line-height: 1.05;
  margin: 3rem 0 2rem 0;
}
h1:first-child {
  margin-top: 0;
}
.info {
  font-size: 0.85em;
  margin: 2rem 0;
}
.info .date {
  color: rgb(from var(--color) r g b / 0.5);
}
.info .date + .author {
  margin-inline-start: 0.5em;
}
h1 + .info {
  margin-top: -1.5rem;
}
h2 {
  font-size: 1.4em;
  line-height: 1.05;
  border-bottom: 0.04em solid rgb(from var(--color) r g b / 0.3);
  padding: 0 0 0.2em 0;
  margin: 1.5em 0 0.75em 0;
}
h2#related,
h2#demos {
  font-size: 0.8rem;
  font-weight: normal;
  font-style: italic;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgb(from var(--color) r g b / 0.5);
  margin-top: 2rem;
}
h3 {
  font-size: 1.15em;
  line-height: 1.1;
  padding: 0;
  margin: 1.5em 0 0.75em 0;
}
h4 {
  font-size: 1em;
  font-weight: bold;
  line-height: 1.1;
  padding: 0;
  margin: 1.5em 0 1em;
}
strong,
h1,
h2,
h3,
h4 {
  color: var(--emphatic-color);
}
.layout {
  max-width: var(--max-width);
  min-height: 100vh;
  padding: 2rem;
  margin: 0 auto;
  box-sizing: border-box;
}
@media (width <= 800px) {
  html {
    --max-width: 100%;
  }
}
@media (width <= 500px) {
  .layout {
    padding: 1.5rem 1.25rem;
  }
}