a {
  color: #555;
  outline: none;
}

.title a {
  text-decoration: none;
  color: #120b12;
  font-size: 34px;
  line-height: 34px;
  font-display: optional;
}

.emoji {
  font-family: apple color emoji, segoe ui emoji, noto color emoji,
    android emoji, emojisymbols, emojione mozilla, twemoji mozilla,
    segoe ui symbol;
}

h1,
p,
pre {
  margin-left: 40px;
  margin-right: 40px;
}

.page p,
.page pre {
  font-size: 18px;
  line-height: 26px;
}

.header {
  height: 40px;
  padding: 4px;
  line-height: 40px;
  font-size: 28px;
  line-height: 28px;
  font-weight: bold;
  color: white;
  padding-left: 30px;
  background-color: #ff6801;
  box-shadow: 0 2px 3px #cf3801;
  grid-column: span 2;
}

.header a {
  color: white !important;
}

html,
body {
  padding: 0px;
  margin: 0px;
  font-family: "Neuton", serif;
  color: #333;
}

.tour {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.next a,
.back a {
  color: #120b12;
}

.nav {
  float: right;
  padding-right: 10px;
}

iframe {
  border-radius: 10px;
}

.page {
  font-family: "IBM Plex Serif", serif;
  overflow-y: auto;
  -webkit-animation: fadein 0.5s; /* Safari, Chrome and Opera > 12.1 */
  -moz-animation: fadein 0.5s; /* Firefox < 16 */
  -ms-animation: fadein 0.5s; /* Internet Explorer */
  -o-animation: fadein 0.5s; /* Opera < 12.1 */
  animation: fadein 0.5s;
  min-height: 50vh;
}

code {
  display: inline;
  background: #444;
  color: white;
  padding-left: 5px;
  padding-right: 5px;
  padding-bottom: 3px;
  margin-right: 3px;
  margin-left: 3px;
}

li {
  padding-top: 3px;
  padding-bottom: 3px;
}

.nav span {
  padding-left: 10px;
}

.toc a {
  color: #120b12;
}

ul,
ol,
h3 {
  margin-left: 40px;
  margin-right: 40px;
}

.bottomnav {
  padding-top: 20px;
  text-align: center;
  font-size: 42px;
}

.bottomnav a {
  text-decoration: none;
  color: #666;
  font-weight: 100;
  font-size: 20px;
}

.bottomnav .back {
  float: left;
  padding-left: 40px;
}

.bottomnav .next {
  float: right;
  padding-right: 40px;
}

body.welcome-cover {
  background: url(cover.jpg) no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  text-align: center;
}

.welcome {
  font-size: 40;
  top: 50%;
  width: 100%;
  position: absolute;
  text-shadow: 2px 2px black;
  font-weight: bold;
  color: white;

  -webkit-animation: fadein 2s; /* Safari, Chrome and Opera > 12.1 */
  -moz-animation: fadein 2s; /* Firefox < 16 */
  -ms-animation: fadein 2s; /* Internet Explorer */
  -o-animation: fadein 2s; /* Opera < 12.1 */
  animation: fadein 2s;
}

@keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Firefox < 16 */
@-moz-keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Internet Explorer */
@-ms-keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.welcome a {
  font-size: 40px;
  color: white;
  text-shadow: 4px 2px black;
  line-height: 80px;
  font-weight: bold;
  text-decoration: none;
}

.welcome a {
  font-size: 120;
}

.welcome-instruction {
  text-shadow: 2px 1px black;
  padding-top: 10px;
  font-size: 30px;
  text-decoration: underline;
}

ul {
  font-size: 18px;
}

.mobile-ferris {
  display: none;
}

.page h1 {
  font-size: 22px;
}

.code {
  padding-top: 60px;
  padding-right: 20px;
}

iframe {
  position: sticky;
  top: 20px;
  height: 500px;
}

.page {
  padding-bottom: 60px;
}   

@media screen and (max-width: 600px) {
  .tour {
    display: block;
  }

  .code {
    font-size: 14px;
    padding-right: 0;
  }

  .header {
    font-size: 20px;
    padding-left: 7px;
    padding-right: 7px;
    line-height: 40px;
    grid-column: unset;
  }

  iframe {
    position: unset;
    top: unset;
    height: 100%;
    border-radius: 0;
  }

  .title a {
    font-size: 28px;
    line-height: 40px;
  }

  .page p,
  h1,
  pre {
    margin-left: 20px;
    margin-right: 20px;
  }

  .page h1 {
    font-size: 22px;
  }

  .page p,
  .page pre {
    font-size: 18px;
    line-height: 26px;
  }

  .page {
    padding-bottom: 0px;
  }   
  

  ul,
  ol,
  h3 {
    margin-left: 0px;
    margin-right: 20px;
  }

  .nav span {
    padding-left: 5px;
  }

  .nav {
    padding-right: 0px;
    letter-spacing: -0.6px;
  }

  .bottomnav a {
    font-size: 22px;
  }

  .bottomnav .back {
    padding-left: 20px;
  }

  .bottomnav .next {
    padding-right: 20px;
  }

  .welcome {
    font-size: 24px;
  }

  .welcome a {
    font-size: 40px;
    line-height: 40px;
  }

  .welcome a {
    font-size: 50;
    text-shadow: 2px 2px black;
  }

  .welcome-instruction {
    padding-top: 10px;
    font-size: 30px;
  }

  .mobile-ferris {
    display: block;
    top: 20%;
    left: 50%;
    margin-left: -75px;
    position: absolute;
    width: 150px;
    -webkit-animation: fadein 2s; /* Safari, Chrome and Opera > 12.1 */
    -moz-animation: fadein 2s; /* Firefox < 16 */
    -ms-animation: fadein 2s; /* Internet Explorer */
    -o-animation: fadein 2s; /* Opera < 12.1 */
    animation: fadein 2s;
  }
}

b,
h1 {
  color: black;
}

.header:fullscreen,
.header:-webkit-full-screen,
.header:moz-full-screen {
  display: none;
}