style.css

* {
  box-sizing: border-box;
}

body {
  width: 100vw;
  height: 100vh;
  overflow: auto;
  background-color: #7373731b;
}

body {
  padding: 1em 2em 2em 17em;
  font-size: 16px;
  line-height: 1.6;
  font-family: "Roboto", sans-serif;
}

.toc {
  position: fixed;
  left: 1.5em;
  top: 3em;
  padding: 1em;
  width: 16em;
  line-height: 2;
}
.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc ul ul {
  padding-left: 2em;
}
.toc li a {
  display: inline-block;
  color: #232323;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}
.toc li a:hover {
  display: inline-block;
  background-color: #a1a1a1;
  color: #232323;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}
.toc li.visible > a {
  color: #111;
  transform: translate(5px);
}

.toc-marker {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}
.toc-marker path {
  transition: all 0.3s ease;
}

.contents {
  padding: 1em;
  max-width: 800px;
  font-size: 1.2em;
  box-shadow: 0 14px 30px rgba(0,0,0,0.1);

  font-family: "Frank Ruhl Libre", sans-serif;
  
}

.contents section {
  position: relative;
  width: 100%;
  margin: 10px auto;
  padding: 10px;
  background: #fff;
  -webkit-box-shadow: 0 14px 30px rgba(0,0,0,0.1);
  box-shadow: 0 14px 30px rgba(0,0,0,0.1);
  border-radius: 4px;
}

.contents img {
  max-width: 100%;
}

.contents input {
  max-width: 100%;
  padding: 10px;
  font-size: large;

}

.content.select-items {
  position: absolute;
  background-color: DodgerBlue;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 99;
}

.contents .code-block {
  white-space: pre;
  overflow: auto;
  max-width: 100%;
}
.contents .code-block code {
  display: block;
  background-color: #f9f9f9;
  padding: 10px;
}
.contents .code-inline {
  background-color: #f9f9f9;
  padding: 4px;
}


.contents h2 h3 {
  padding-top: .5em;
  background-color: #f9f9f9;

}
.contents h2 {
  margin-top: .2em;
  
}

@media screen and (max-width: 1200px) {
  body {
    font-size: 14px;
  }
}