body {
    justify-content: flex-end;
    background: black;
}

.back {
    position: absolute;
    top: 1rem;
    left: 1rem;

    width: 3rem;
    height: 3rem;

    background-color: white;

    border-radius: 100%;
    border: solid 0.3rem cornflowerblue;

    padding: 0;

    cursor: pointer;
}

.back > img {
    width: 100%;
    height: 100%;
}

.instructions {
    font-size: 3rem;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 1rem;
    border-radius: 1rem;
    margin: 0;
}

#display {
    position: absolute;
    top: 0;
    left: 0;

    width: 100%;
    height: 100%;

    z-index: -1;
}

@media (pointer: coarse) {
    .back {
        width: 6rem;
        height: 6rem;
    }

    .instructions {
        font-size: 4rem;
        padding: 2rem;
        border-radius: 2rem;
    }
}