html,
body {
    margin: 0;
    padding: 0;
}

.flex-container {
    display: flex;
    flex-flow: row || wrap;
}

.widget {
    height: 200px;
    padding: 10px;
    box-sizing: border-box;
    border: 2px solid #ccc;
    flex: 0 0 98%;
    margin: 0 1% 10px;
}

/* Media queries for .widget */
@media (min-width: 500px) {
    .widget {
        flex: 0 0 48%;
    }
}

@media (min-width: 700px) {
    .widget {
        flex: 0 0 31.3333333333333%;
    }
}

@media (min-width: 980px) {
    .widget {
        flex: 0 0 23%;
    }
}