:root {
  --dark: black;
  --light-dark: #232425;
  --lighter-dark: #333435;

  --light: white;
  --dark-light: #fafafa;
  --darker-light: #eeeeec;

  --font-size: 4vmin;
}

html, body {
  margin: 0 auto;
  padding: 0;
  font-size: var(--font-size);
  font-weight: 500;
  text-align: center;
  max-width: none;

  --foreground: var(--light);
  --background: var(--dark);
  --dim: var(--lighter-dark);
  --dimmer: var(--light-dark);
}

code, pre {
  font-size: inherit;
  text-align: left;
}

a {
  color: var(--foreground);
}

body.light {
  --foreground: var(--dark);
  --background: var(--light);
  --dim: var(--darker-light);
  --dimmer: var(--dark-light);
}

body.light a {
  color: var(--dark);
}

ol, ul {
  text-align: left;
  max-width: 50vw;
  margin: 1em auto 0;
}

img, video {
  max-height: 60vh;
  max-width: 60vw;
}

.subtitle, body, h2 {
  font-family: Source Code Pro;
}

.title {
  font-size: 4.0em;
}
.subtitle {
  font-size: .28em;
  margin-top: 1em;
}
h2 {
  font-size: 2em;
}

h2, h3, h4, h5, h6, .figure {
  padding: 0;
  margin: 0;
}

#content {
  display: flex;
  flex-direction: column;
  margin: 0 .5em;
}

#content > * {
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.note {
  display: none;
}

#help {
  font-size: 12pt;
  position: fixed;
  display: flex;
  left: 1em;
  top: 1em;
  color: black;
  background: white;
  border: 1px solid #ddd;
  box-shadow: 0 0 32px #eee;
  border-radius: 1em;
  padding: 1em;
  box-sizing: border-box;
}

#help code {
  color: black;
  background: #eee;
  margin: 0 0.2em;
}

#key-bindings {
  th, td {
    padding: 0.5em;
    border: 1px solid #eee;
  }

  td:first-child, th:first-child {
    text-align: right;
  }
  td:last-child, th:last-child {
    text-align: left;
  }
}

#help-toggle {
  font-size: 14pt;
  position: fixed;
  right: 4px;
  bottom: 4px;
  color: var(--foreground);
  border: 1px solid var(--foreground);
  background: var(--background);
  border-radius: 50%;
  opacity: .75;
  width: 1.5em;
  height: 1.5em;
  padding: 0;
  cursor: pointer;
}

#postamble {
  display: none;
}