div,h1,h2{
    display: grid;
    justify-content: center;
}

button{
    background-color: #4CAF50;
    font-size: 24px;
    color: black;
    transition-duration: 0.4s;
}

button:hover {
    background-color: white;
    border: 2px solid #4CAF50;
    color: black;
}

body{
    background-color: #008CBA;
}