CSS margin-block-start property
It is a logical property that defines space at the start side of a block. The selection of start side depends on the writing-mode.
It behaves like margin-top for the horizontal-tb writing mode.
It behaves like margin-right or margin-left for the vertical-rl and vertical-lr writing-mode respectively.
Change the direction of flow of text.
horizontal-tb vertical-lr vertical-rl
margin-block-start : length
There is no thickness of the margin area at the start side of the border box.
+ve value represents margin area at the start side of block.
The space decreases by 20px at the start of block i.e the the subsequent content may merge into the element.
It applies to all elements
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