Template:Card flex/styles.css

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

/* one item */
.cardflex .card-container:nth-last-child(1) {
/* -or- li:only-child { */
    width: 100%;
}

/* two items */
.cardflex .card-container:nth-last-child(2),
.cardflex .card-container:nth-last-child(2) {
    width: 50%;
}

/* three items */
.cardflex .card-container:nth-last-child(3),
.cardflex .card-container:nth-last-child(3) {
    width: 33.3333%;
}

/* four items */
.cardflex .card-container:nth-last-child(4),
.cardflex .card-container:nth-last-child(4) {
    width: 25%;
}

@media only screen and (max-width: 1200px) {
	.cardflex  .card-container{
		width:50%;
	}
}

@media only screen and (max-width: 1000px) {
	.cardflex  .card-container{
		width:100%;
	}
}