* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

root {
  font-size: 62.5%;
}

/* GENERAL SELECTORS */

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.5;
  color: #4d4e53;
  font-size: 1.5rem;
}

header {
  font-size: 3rem;
  color: #000;
}

article {
  margin: 1.5rem;
}

article p,
article li {
  margin-bottom: 2rem;
}

article li,
code {
  margin-left: 6rem;
}

code {
  display: block;
  margin: 1rem;
  padding: 1.5rem;
  background-color: #f7f7f7;
  font-size: 1.2rem;
  border-radius: 0.5rem;
  line-height: 2;
}

/* SIDE NAVIGATION BAR */

.side-nav {
  position: fixed;
  height: 100%;
  width: 30rem;
  border-right: solid #00161666;
}

.side-nav-header {
  text-align: center;
  margin: 1.5rem;
  padding-bottom: 1rem;
}

.side-nav ul li {
  padding: 1rem;
  border-bottom: 0.1rem solid #000;
  position: relative;
}

.side-nav ul li:first-child {
  border-top: 0.1rem solid #000;
}

.side-nav ul li:last-child {
  border-bottom: 0;
}

.side-nav a {
  text-decoration: none;
  color: #4d4e53;
  margin-left: 2rem;
  display: block;
  font-size: 1.7rem;
}

/* MAIN PAGE */

.main-page {
  position: absolute;
  margin-left: 31rem;
  padding: 1.5rem;
}

.main-section {
  margin: 2rem;
}