.kastenDoppeltSz {
	display: flex;
	/*align-items: center;*/
	justify-content: center;
	flex-flow: row wrap;
}
.kastenDoppeltSz div {
	background-color: rgba(0, 0, 0, 0.6);
	width: 320px;
	margin: 25px;
	padding: 10px;
}
.kastenDoppeltWe {
	display: flex;
	/*align-items: center;*/
	justify-content: center;
	flex-flow: row wrap;
}
.kastenDoppeltWe div {
	background-color: rgba(255, 255, 255, 0.75);
	width: 320px;
	margin: 25px;
	padding: 10px;
}

.kastenEinfachSz {
	background-color: rgba(0, 0, 0, 0.6);
	display: block;
	padding: 30px;
	position: relative;
	text-align: left;
	text-rendering: auto;
	width: 720px;
	margin: 0 auto;
	box-sizing: border-box;
}
.kastenEinfachWe {
	background-color: rgba(255, 255, 255, 0.75);
	display: block;
	padding: 30px;
	position: relative;
	text-align: left;
	text-rendering: auto;
	width: 720px;
	margin: 0 auto;
	box-sizing: border-box;
}

@media screen and (max-width: 500px) {

    .kastenEinfachSz {
        max-width: 100%;
		padding: 10px;
		margin: 0;
	}
	.kastenEinfachWe {
        max-width: 100%;
		padding: 10px;
		margin: 0;
	}

	.kastenDoppeltSz div {
		width: 100%;
	}
	.kastenDoppeltWe div {
		width: 100%;
	}
}

@media screen and (max-width: 720px) {

    .kastenEinfachSz {
        max-width: 100%;
		padding: 10px;
		margin: 0;
	}
	.kastenEinfachWe {
        max-width: 100%;
		padding: 10px;
		margin: 0;
	}
}