style.css

h1{
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
}
html,body {
  text-align: center;
  background-color: #68ef90;
  height: 900px;
  
}
.button {
  display: inline-block;
  border-radius: 4px;
  background-color: #f4511e;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 28px;
  padding: 20px;
  width: 200px;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
  box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(228, 10, 10, 0.425);

}

.button span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.5s;
}

.button span:after {
  content: '\00bb';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.5s;
}

.button:hover span {
  padding-right: 25px;
}

.button:hover span:after {
  opacity: 1;
  right: 0;
}
.button-container-div {
    display: block;
    margin:0 auto;
}
p{
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  padding: 20px 20px;
  font-weight: 300;
  font-style: oblique;
  font-size: large;
}
#main{
  text-align: center;
  background-color: #a268ef;
  height: 200px;
  width: auto;
}

a:link, a:visited {
  text-align: center;
  text-decoration: none;
  display: inline-block;
}

a:hover, a:active {
  background-color: red;
}
footer{
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  padding: 20px 20px;
  font-weight: 300;
  font-size: large;
}