* {
  -webkit-text-size-adjust: none !important;
}
body {
  font-family: Times;
  background-color: lightgray;
  margin: 0;
  padding: 0;
  font-size: 16px;
  line-height: 1.5em;
}
div.container {
  box-sizing: border-box;
  width: 800px;
  margin: 0 auto;
  padding: 40px 60px;
  background-color: white;
}
h1 {
  font-size: 27px;
	line-height: 1.0em;
}
h2 {
  margin-top: 36px;
  margin-left: 1px;
  font-size: 33px;
}
h3 {
  color: #666;
  font-size: 24px;
  margin-top: 40px;
  margin-left: 1px;
  padding-top: 40px;
  position: sticky;
  top: -25px;
  background-color: white;
  height: 40px;
}
h4 {
  color: darkgray;
  font-size: 18px;
  font-weight: normal;
  margin-top: -20px;
  margin-left: 1px;
  margin-bottom: 40px;
}
h4::before {
  content: "What Functions will Learn: ";
}
h3, h4 {
  width: 680px;
}
h3 a, h5 a {
  display: inline-block;
  padding: 0 16px;
  font-size: 13px;
  font-weight: normal;
  text-decoration: none;
  color: white;
  border-radius: 60px;
  transition: 0.3s;
}
h3 a {
  float: right;
  vertical-align: top;
}
h3 a:hover, h5 a:hover {
  background-color: darkgray;
}