:root {
  --content-max: 60ch;
  --toc-width: 6rem;
}

* {
  box-sizing: border-box;
  text-wrap: pretty;
}

::selection {
  background-color: #222233;
}

body {
  margin: 0;
  font-family: "Fira Sans", system-ui, -apple-system, sans-serif;
  line-height: 1.4;
  color: #EEEEEE;
  background-color: #080818;
  font-size: 24px;
  hyphens: manual;
}

.page {
  display: grid;
  grid-template-columns:
    1fr minmax(0, var(--content-max)) minmax(0, var(--toc-width)) 1fr;
  gap: 1.5rem;
  padding: 0rem 0rem;
}

main {
  grid-column: 2;
}

aside {
  grid-column: 3;
  position: sticky;
  top: 1.5rem;
  align-self: start;
  font-size: 0.9rem;
}

aside nav {
  border-left: 1px solid #AAA;
  padding-left: 1rem;
}

aside a {
  display: block;
  text-decoration: none;
  margin: 0;
  margin-top: 0.5rem;
}

aside a:hover {
  color: #FFF;
}

h1,
h2 {
  line-height: 1.25;
}

h1 {
  background-color: #000080;
  padding: 1rem;
  margin: 0.5rem 0;
}

h2,
h3 {
  color: #8888DD;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

h3 {
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}

p {
  margin-top: 0.5rem;
}

a {
  font-style: italic;
  color: #8888DD;
}

a:visited {
  color: #888888;
}

nav a:visited {
  color: #8888DD;
}

nav a:hover {
  color: #DDDDDD;
}

#cover {
  margin-top: 0;
}

#robot {
  max-width: 30%;
  color: #8888dd;
}

main img,
main video {
  max-width: 100%;
  max-height: 65vmax;
  width: auto;
  height: auto;
  display: block;
  margin: 1.5rem auto;
}

main figure {
  width: 100%;
  display: block;
  margin: 0;
  padding: 0;
  font-style: italic;
  text-align: center;
  font-size: 1rem;
}

figcaption {
  margin-bottom: 2rem;
}

pre {
  background-color: #222233;
  border-left: #8888DD solid 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

pre code {
  display: block;
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
  padding-left: 1rem;
  font-size: 0.9rem;
}


/* Responsive: hide TOC and center content */
@media (max-width: 770px) {
  .page {
    grid-template-columns: 1fr minmax(0, var(--content-max)) 1fr;
  }

  aside {
    display: none;
  }

  main {
    grid-column: 2;
    font-size: 17px;
  }

  pre code {
    font-size: 0.5rem;
  }
}