html {
  overflow-y: scroll;
}

:root {
  --bgcolor: white;
  --fontcolor: #1f1f1f;
  --linkcolor: #00e;
  --visitedcolor: #551a8b;
  --precolor: #fff;
  --prebgcolor: #1f1f1f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bgcolor: white;
    --fontcolor: #1f1f1f;
    --linkcolor: #5bf;
    --visitedcolor: #ae5ee0;
    --precolor: white;
    --prebgcolor: #383838;
  }
}

body {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 10px;
  font: 16px/1.9 'Roboto', sans-serif;
  color: var(--fontcolor);
  background: var(--bgcolor);
}

header,
nav,
main,
footer {
  padding: 2px calc((100% - 800px) / 2) 0;
}


.text-sm {
  font-size: 13px;
  line-height: 1.6;
  color: #666;
}

a:link {
  color: var(--linkcolor);
}

a:visited {
  color: var(--visitedcolor);
}

a:active {
  color: var(--visitedcolor);
}

h1,
h2,
h3 {
  font: monospace;
  line-height: 1.2;
}

p>code {
  color: var(--precolor);
  background: var(--prebgcolor);
  padding: 2px;
}

pre {
  color: var(--precolor);
  background: var(--prebgcolor);
  padding: 24px;
  overflow-x: auto;
}

article {
  padding: 24px 0;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

figcaption {
  color: #888;
  font: 12px/1.5 monospace;
  text-align: center;
}

figure {
  margin: auto;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.dark-mode {
  background: #1f1f1f;
  color: white;
}

body {
  position: relative;
}

.toggle-button {
  position: absolute;
  top: 16px;
  right: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1000;
  color: var(--fontcolor);
  font-size: 1.1em;
}


.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  height: 32px;
  background-color: lightblue;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--bordercolor);
}

.links {
  display: flex;
}

.link {
  margin-right: 20px;
  text-decoration: none;
  color: var(--linkcolor);
}

img {
  margin-top: 20px;
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}


footer {
  margin-top: 40px;
  border-top: 1px solid #E4E5E7;
  padding-top: 0px;
  padding-bottom: 32px;
  background: white;
  height: 27px;
  color: #6A6C6F;
  text-align: center;
}