The height CSS descriptor is a shorthand descriptor for setting both min-height and max-height of the viewport. by providing one viewport length value will set both, the minimum height and the maximum height, to the value provided.
The max-height CSS descriptor specifies the maximum height of the viewport of a document defined via the @viewport at-rule.
The max-width CSS descriptor specifies the maximum width of the viewport of a document defined via the @viewport at-rule.
The min-height CSS descriptor specifies the minimum height of the viewport of a document defined via the @viewport at-rule.
The min-width CSS descriptor specifies the minimum width of the viewport of a document defined via @viewport.