style.css

body
{
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #031321;
  font-family: consolas;
}
/* for the glowing button */
a
{
  position: relative;
  display: inline-block;
  padding: 15px 30px;
  color: #2196f3;
  text-transform: uppercase;
  letter-spacing: 4px;
  text-decoration: none;
  font-size: 24px;
  overflow: hidden;
  transition: 0.2s;
}
/* for the button hover glow */
a:hover
{
  color: #255784;
  background: #2196f3;
  box-shadow: 0 0 10px #2196f3, 0 0 40px #2196f3, 0 0 80px #2196f3;
}
h1
{
  color: aqua;
  padding: 40px;
}