.page {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

form {
    width: 100%;
    padding: 0 1em;
}

input,
button {
    width: 100%;
    margin-top: 10px;
}

@media screen and (min-width: 600px) {
    form {
        max-width: 400px;
    }
}