/* default theme */

:root {
  --bg: black;
  --fg: #ffffff;
  --aside-bg: #fafafa;
  --aside-fg: #363c46;
  --aside-width: 16rem;
  --link-fg: #0084ff;
}

html {
  height: 100%;
  overflow-x: hidden;
}

body {
  min-height: 100%;
  margin: 0;
  background-color: var(--bg);
  color: var(--fg);
  font-family: sans-serif;
  overflow-x: hidden;
}

/* aside */

aside {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--aside-width);
}

aside section {
  font-size: 0.875rem;
  line-height: 1.75;
  background-color: var(--aside-bg);
  color: var(--aside-fg);
  display: flex;
  flex-direction: column;
  padding: 1rem;
  box-sizing: border-box;
  width: var(--aside-width);
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
}

aside nav {
  padding-top: 1rem;
}

aside ol {
  padding: 0;
  margin: 0;
  list-style-position: inside;
}

aside li {
  margin: 0;
}

aside li a {
  text-decoration: none;
}

aside ::marker {
  font-weight: bold;
}

aside .current {
  font-weight: bold;
}

#menu-button {
  display: none;
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.25rem;
  z-index: 1;
  border-radius: 4px;
  background-color: var(--aside-bg);
  color: var(--aside-fg);
  width: 24px;
  height: 24px;
  cursor: pointer;
}

/* main */

main {
  position: relative;
  margin-left: var(--aside-width);
  flex: 1;
}

main > h1 {
  position: absolute;
  left: 0;
  right: 0;
  font-size: 1.25rem;
  font-weight: normal;
  margin: 1rem 4rem;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

article {
  box-sizing: border-box;
  padding: 3rem 2rem;
  margin: 0 auto;
  max-width: 750px;
}

article h1 {
  font-size: 2rem;
}

article h2, article h3 {
  margin-top: 2.5rem;
}

main nav {
  display: flex;
  margin-top: 2rem;
}

main nav .prev {
  margin-right: auto;
}

main nav .next {
  margin-left: auto;
}

a {
  color: inherit;
  transition: color .05s;
}

a:hover {
  color: var(--link-fg);
}

code {
  font-family: monospace;
  font-size: 0.875rem;
}

/* footer */

footer {
  padding-top: 1rem;
  margin-top: auto;
  font-size: .75rem;
}

/* dark theme */

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111316;
    --fg: white;
    --aside-bg: #171a1f;
    --aside-fg: white;
    --link-fg: #ffc400;
  }
}

/* small screens */

@media screen and (max-width: 1080px) {
  #menu-button {
    display: initial;
  }

  aside {
    display: none;
  }

  main {
    margin-left: 0;
  }

  article {
    padding: 3rem 1rem;
  }

  #menu-control:checked ~ aside {
    display: initial;
  }

  #menu-control:checked ~ main,
  #menu-control:checked ~ #menu-button {
    transform: translateX(var(--aside-width));
  }
}

/* print */

@media print {
  :root {
    --bg: white;
    --fg: black;
  }

  main {
    margin-left: 0;
  }

  article {
    padding: 0;
    margin: 0;
    max-width: initial;
  }

  aside, main > h1, main nav {
    display: none;
  }
}