#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 300px;
  height: 100%;
  border-right: 5px solid #444;
}
header {
  text-align: center;
  font-family: "Franklin Gothic Medium", "Arial Narrow", Arial, sans-serif;
  font-size: 35px;
  padding: 5px 0 5px 0;
  color: #444;
  text-transform: capitalize;
  margin: 20px;
}
ul {
  margin: 0;
  padding: 0;
}
#navbar ul {
  height: 88%;
  padding: 0;
  overflow-y: auto;
  overflow-x: hidden;
}
#navbar li {
  list-style: none;
  border-top: 3px solid #444;
  position: relative;
  max-width: 100%;
  padding: 10px 0 10px 0;
  text-align: center;
  letter-spacing: 1px;
}
a {
  text-decoration: none;
}
.nav-link {
  font-size: 25px;
  color: gray;
}
#main-doc {
  position: absolute;
  margin-left: 310px;
  padding: 20px;
  margin-bottom: 110px;
}
#main-doc header {
  text-align: left;
}
code {
  display: block;
  white-space: pre;
  position: relative;
  word-break: normal;
  word-wrap: normal;
  line-height: 2;
  background-color: #f7f7f7;
  padding: 15px;
  margin: 10px;
  border-radius: 5px;
}

@media only screen and (max-width: 815px) {
  /* For mobile phones: */
  #navbar ul {
    border: 1px solid;
    height: 207px;
  }

  #navbar {
    background-color: white;
    position: absolute;
    top: 0;
    padding: 0;
    margin: 0;
    width: 100%;
    max-height: 275px;
    border: none;
    z-index: 1;
  }

  #main-doc {
    position: relative;
    margin-left: 0px;
    margin-top: 270px;
  }
}

@media only screen and (max-width: 400px) {
  #main-doc {
    margin-left: -10px;
  }

  code {
    margin-left: -20px;
    width: 100%;
    padding: 15px;
    padding-left: 10px;
    padding-right: 45px;
    min-width: 233px;
  }
}