style.css

*{
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-weight: 600;
}
html {
  height: 100%;
}
body {
  background-image: linear-gradient(black, darkgrey, grey);
  background-repeat: no-repeat;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}
.container{
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
  max-width: 800px;
  margin: auto;
  text-align: center;
}
.container img, h1{
  align-items: center;
}
img{
  vertical-align: middle;
  width: 100px;
  height: 100px;
  border-radius: 50%
}
h1{
  color: white;
}
a{
  width: 500px;
  align-items: center;
  margin-bottom: 20px;
}

a:link, a:visited {
  color: white;
  border: 3px solid white;
  padding: 20px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  width: 500px;
}
a:hover, a:active {
  background-color: white;
  color: black;
}

/* .button{
  border: 20px yellow;
}
a.button {
  -webkit-appearance: button;
  -moz-appearance: button;
  appearance: button;

  text-decoration: none;
  color: initial;
  border: 20px yellow;
  background-color: rgb(0, 162, 255);
  color: Black;
  width: 500px;
  display: block;
}
 */