body {
    background: white;
    color: black;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}
p.image {
    text-align: center;
}
.container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    background-color: dodgerblue;
}
.container div {
    background-color:#f1f1f1;
    margin: 10px;
    padding: 20px;
    font-size: 30px;
    color: black;
    flex: 1 1 100%;
    text-align: center;
}  


@media (min-width: 768px) {
    body {
        background-color: steelblue;
        color: white;
        font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    }
    .container div {
        flex: 1 1 calc(50% - 40px);
    }
}
@media (min-width: 1200px) {
    body {
        background-color: darkblue;
        color: white;
        font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    }
    p {
        column-count: 2;
        column-gap: 2rem;
    }
    p.dotted {
        column-gap: 2rem;
        column-rule: 5px dotted black;
        outline-style: dotted;
    } 
    .container div {
        flex: 1 1 calc(25% - 20px);
    }

}