:root {
  --color-fg: black;
  --color-bg: white;
  --color-2nd-fg: #555555;
  --color-2nd-bg: #f5f5f5;
  --color-pre-border: hsla(0, 100%, 0%, 30%);

  --link-url: url(img/link/light.svg);

  color:            var(--color-fg);
  background-color: var(--color-bg);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-fg: white;
    --color-bg: black;
    --color-2nd-fg: #aaaaaa;
    --color-2nd-bg: #222222;
    --color-pre-border: hsla(50, 100%, 70%, 10%);

    --link-url: url(img/link/dark.svg);
  }

  a {
    color: hsl(211, 100%, 60%);
    &:visited {
      color: hsl(242, 100%, 80%);
    }
  }
}

/* General declarations */

body {
  margin: 0px auto;
  padding: 1%;
  max-width: 750px;
}

.icon {
  width: 22px;
  height: 22px;
  vertical-align: middle;
}


/* Navigation header */

header {
  margin-bottom: 30px;
  padding: 12px 0px 12px 0px;
}

nav .nav-row {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  flex-wrap: wrap;
}

nav a {
  font-size: 18px;
  margin: 12px;
  text-decoration: none;
}

nav ul, nav li {
  display: inline;
}

nav ul li a {
  font-size: 14px;
  margin: 6px;
}


/* Article bodies */

#published-at, #updated-at {
  color: var(--color-2nd-fg);
  font-size: 14px;
  font-style: italic;
}

blockquote {
  font-style: italic;
  color: var(--color-2nd-fg);
  padding-left: 10px;
  border-left: 3px solid var(--color-2nd-fg);
}

.collection-list {
  list-style-type: none;
}

.collection-list li {
  margin: 20px 0px;
}


/* Footer */

body > footer {
  font-size: 14px;
  padding: 12px 0px 12px 0px;
}

body > footer li {
  list-style-type: none;
  margin-top: 10px;
}

body > footer li a {
  margin-left: 5px;
}

.content-footer, .page-footer, #footnotes {
  border-top: 0.5px solid var(--color-2nd-fg);
}



/* Code blocks */

/* The "lineno" class is the default generated by Rouge for table-row in code blocks, see:
   https://github.com/rouge-ruby/rouge */
pre.lineno {
  margin-right: 3px;
  padding-right: 3px;
  border-right: 1px solid;
  border-color: var(--color-pre-border);
  text-align: right;
  user-select: none;
}

.highlight, .listingblock .content {
  border: 1px solid;
  border-color: var(--color-pre-border);
  border-radius: 10px;
  background-color: var(--color-2nd-bg);
}

pre {
  overflow: auto;
}


/* Code block anchors */

a.code-line-anchor {
  color: var(--color-fg);
  user-select: none;
  text-decoration: none;
}

a.code-line-anchor:hover {
  text-decoration: underline;
}


/* Header anchor */

div.header-anchor {
  color: var(--color-fg);
  text-decoration: none;
  display: block;
  margin-bottom: 15px;
}

div.header-anchor h1,
div.header-anchor h2,
div.header-anchor h3,
div.header-anchor h4,
div.header-anchor h5,
div.header-anchor h6 {
  display: inline;
}


div.header-anchor img {
  visibility: hidden;
}

div.header-anchor:hover img {
  visibility: visible;
}


/* Plaintext code block links */

.plaintext {
  margin: auto auto 0 auto;
  text-align: right;
  font-family: monospace;
}

a.anchor {
  background: transparent var(--link-url) center right no-repeat;
  padding-right: 22px;
  margin-left: 10px;
  visibility: hidden;
}

h2:hover a.anchor {
  visibility: visible;
}


/* Fix asciidoc shortcoming */

.line-through {
  text-decoration: line-through;
}