CODE EXAMPLE FOR HTML

display flex how to position last element at the bottom

/* parent has an specific height */
#parent {
	display: flex;
	flex-direction: column;
	height: 50vh;
}

/* just giving space for demonstration */
#second, #three {
	margin-top: 20px;
}

/* set aut margin for last element */
#last {
	margin-top: auto;
}