#petronas {
  display: inline-block;
  padding: 15px 25px;
  font-size: 26px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  outline: none;
  color: #fff;
  background-color: rgb(92, 115, 120);
  border: none;
  border-radius: 5px;
  box-shadow: 0 9px #999;
}

#petronas:hover {background-color: #3e8e41}

#petronas:active{
  background-color: rgb(146, 148, 149);
  box-shadow: 0 5px #666;
  transform: translateY(4px);
}

html, body {
  height: 100%;
}

body {
  margin: 10;
  display: flex;

  /* This centers our sketch horizontally. */
  justify-content: center;

  /* This centers our sketch vertically. */
  align-items: center;
}