body {
  background-color: mediumseagreen;
}

.button {
  display: block;
  margin-left: auto;
  margin-right: auto;
  background-color: #e7fe1663;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  font-size: 16px;
  transition-duration: 0.4s;
  cursor: pointer;
}

.button:hover {
  background-color: white;
  color: black;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 300px;
}