img {
    max-width: 100%;
}
.no-margin {
    margin: 0;
}
@media (min-width: 768px) {
    .grid {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    .columnas-6 {
        flex: 0 0 calc(50% - 1rem);
    }
}