*{
	margin: 0px;
	padding: 0px;
}
.contenedor{
	display: flex;
	flex-direction: column;
	height: 100vh;
}
.encabezado{
	padding: 15px;
	background: #d14b4b;
	color: white;
	text-align: center;
	font-size: 18px;
}

.contenido{
	display: flex;
	flex-direction: space-between;
	flex: 1;
}
.caja{
	border: 1px solid lightgreen;
	margin: 15px;
	padding: 20px;
	flex: 1;
	box-shadow: 5px 5px rgba(0, 0, 0, 0.5);

}
.pie{
	padding: 10px;
	background: #e95f5f;
	text-align: center;
	font-size: 14px;
}
@media(max-width:500px){
	.contenido{
		flex-direction: column;
	}

}