:root {
  /* define applied colors */
  --bg: #fdfdfd;
  --fg: #1a1a1a;
  --link-color: #0000EE;
}
@media (prefers-color-scheme: dark) {
  /* change apllied colors to the dark gruvbox pallet
   * https://github.com/morhetz/gruvbox
   */
  :root {
    --bg: #282828; /* dark bg */
    --fg: #ebdbb2; /* dark fg */
    --link-color: #d79921; /* yellow */
  }
}

html {
  line-height: 1.5;
  font-family: Georgia, serif;
  font-size: 20px;
  color: var(--fg);
  background-color: var(--bg);
}

body {
  margin: 0 auto;
  max-width: 80%;
  padding: 50px;
  hyphens: auto;
  word-wrap: break-word;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
}

footer {
  bottom: 0;
}

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

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

@media (max-width: 600px) {
  body {
    font-size: 0.9em;
    padding: 1em;
  }
}

* {
  box-sizing: border-box;
}

/* Position the image container (needed to position the left and right arrows) */
.container {
  position: relative;
  max-height: 100%;
}

/* Hide the images by default */
.slide {
  display: none;
  height: 400px;
}

/* Add a pointer when hovering over the thumbnail images */
.cursor {
  cursor: pointer;
}

/* Next & previous buttons */
.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 40%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* Container for image text */
.caption-container {
  text-align: center;
  background-color: #222;
  padding: 2px 16px;
  color: white;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

/* Six columns side by side */
.column {
  float: left;
  width: 16.66%;
}

/* Add a transparency effect for thumnbail images */
.demo {
  opacity: 0.6;
  padding: 1px;
}

.active,
.demo:hover {
  opacity: 1;
}