*,
*::before,
*::after {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  display: grid;
  grid-template-columns: 23% 77%;
  height: 100vh;
  width: 100%;
}

nav,
main {
  overflow: scroll;
}

nav {
  border-right: 4px solid rgb(165, 165, 165);
}

h1 {
  text-align: center;
  margin: 20px auto;
  font-size: 28px;
  font-weight: 200;
  letter-spacing: 2px;
  color: #242424;
}

nav ul li {
  border-top: 1px solid black;
  padding: 16px 0 16px 32px;
  color: rgb(77, 78, 83);
}

nav a {
  text-decoration: none;
}

main {
  padding: 40px 40px 20px;
  color: rgb(77, 78, 83);
}

h3 {
  font-size: 28px;
  font-weight: 200;
  margin-bottom: 20px;
  color: #242424;
}

p {
  margin-bottom: 20px;
}

main ul li {
  margin: 0 0 20px 40px;
}

main ul li ul {
  margin-top: 20px;
}

code {
  padding: 15px;
  display: block;
  text-align: left;
  line-height: 26px;
  white-space: pre-line;
  background-color: #f7f7f7;
}

@media screen and (max-width: 992px) {
  body {
    grid-template-columns: 100%;
  }
  nav {
    border-right: none;
    border-bottom: 4px solid rgb(165, 165, 165);
  }
  nav ul {
    border-top: 4px solid rgb(165, 165, 165);
  }
}