body {
  background-color: black;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
}

button{
  color: blue;
  width: 20%;
  height: 20vh;
  font-size: 50px;
  border-radius: 20px;
  border: none;
  text-align: center;
  transition: transform 0.3s ease-in-out;
  background-color: #181717;
}

button:hover {
  opacity: 0.8;
  border: 2px blue solid;
  transform: scale(1.1);
}