body {
    width: 95vw;
    height: 95vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

div {
    margin: 1rem;
}

button {
    background-color: blue;
    border: 1px solid black;
    height: 50px;
    width: 100px;
    padding: 1rem;
    font-size: large;
    user-select: none;
}