.flex-container {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
}

.flex-container > div {
    flex: auto;
    width: 45%;
    margin: 0 1% 1% 0;
    padding: .5em .6em;
    border: 1px solid #c0c0c0;
    border-radius: 6px;
    background-color: white;
}

#main-content .flex-container > div img {
    margin:0 0 0 .75em;
    border-radius:4px;
}

#main-content .flex-container > div img+h2 {
    margin-top:0
}

@media screen and (min-width: 640px) {
    .flex-container > div {
        width:29%;
        }
}