.container {
    display: grid;
    grid-template-rows: 40px 1fr 40px;
    height: 100%;
    width: 100%;
    text-align: center;
    place-items: center;
}

.container img {
    margin: auto;
}

.container button {
    margin: 20px auto 0 auto;
    display: block;
    font-size: 18px;
    font-size: 1.8rem;
}