@import url('https://fonts.googleapis.com/css2?family=Crimson+Text&display=swap');

:root {
  --gutter: 2rem;
  --marginalia-width: 25rem;
  --sidebar-width: 11em;
  --nav-button-size: 2rem;
  --max-width: 1280px;
  --right-width: calc(100vw - var(--marginalia-width) - 1.5 * var(--gutter));
}

#darkside {
  position: fixed;
  z-index: -1;
  top: 0;
  right: 0;
  width: var(--right-width);
  height: 100vh;
  background-color: #eee;
  border-left: 1px dashed #ddd;
}

html {
  font-family: 'Crimson Text', serif;
  font-size: 14pt;
  color: #383330;
}

body {
  background-color: #f8f8f8;
}

code {
  font-family: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 85%;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 2px;
  padding: 0.1em 0.1em;
  white-space: nowrap;
}

pre > code {
  word-wrap: normal;
  white-space: pre;
  display: block;
  width: var(--marginalia-width);
  padding-left: var(--gutter);
  padding-right: calc(var(--gutter) / 2);
  padding-top: 1em;
  padding-bottom: 1em;
}

article {
  max-width: var(--max-width);
  margin-top: 1rem;
  margin-left: var(--sidebar-width);
  margin-right: auto;
}

section {
  margin-top: 1rem;
}

#nav-button {
  color: white;
  background-color: black;
  position: absolute;
  border-bottom-right-radius: calc(var(--nav-button-size) * 0.9);
  width: var(--nav-button-size);
  height: var(--nav-button-size);
  text-align: center;
}

#nav-button:focus ~ ul.toc {
  display: block;
}
#nav-button:focus #sidebar {
  height: 100vh;
}

#sidebar:hover ul.toc {
  display: block;
}

#sidebar {
  position: fixed;
  top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: #3a3a3a;
}

#sidebar #updated-at {
  color: white;
  margin: 0.5em;
  bottom: 0;
  position: fixed;
}

ul.toc {
  padding: 0.5em;
}

ul.toc > li > a {
  color: white;
  padding-left: 1em;
  text-indent: -1em;
  display: block;
}

ul.toc > li {
  line-height: 1.5;
  display: block;
}

h1 {
  font-size: 150%;
  color: #48f;
  text-align: center;
  text-decoration: underline;
}

h2 {
  text-align: center;
}

p {
  line-height: 1.5;
  max-width: var(--marginalia-width);
  margin: var(--gutter);
}

.subject {
  display: block;
}

img.subject {
  border: 1px solid #ccc;
  box-shadow: 0px 2px 6px rgba(0, 0, 0, 0.10);
}

@media (min-width: 76rem) {
  :root {
    --right-width: calc(100vw - var(--marginalia-width) - 1.5 * var(--gutter) - var(--sidebar-width));
  }
}

@media (max-width: 76rem) {
  article {
    margin-left: auto;
  }

  #sidebar {
    height: auto;
  }

  ul.toc {
    display: none;
  }
}

@media (max-width: 66rem) {
  #darkside {
    display: none;
  }

  h1, h2, h3, h4, h5, h6 {
    width: 80%;
    margin-left: auto;
    margin-right: auto;
  }

  .subject {
    /* width: calc(100% - 2 * var(--gutter)); */
    margin-bottom: 1em;
    max-width: var(--marginalia-width);
    margin-left: auto;
    margin-right: auto;
  }

  p {
    margin-left: auto;
    margin-right: auto;
  }
}

@media (min-width: 66rem) {
  h1, h2, h3, h4, h5, h6 {
    margin-left: var(--gutter);
    max-width: var(--marginalia-width);
  }

  section {
    clear: both;
  }

  .subject {
    clear: right;
    float: right;
    width: calc(100% - (var(--marginalia-width) + 3 * var(--gutter)));
    margin: 0 var(--gutter) 1em var(--gutter);
  }
}