Dimensions
Modal's default width is defined by design as 420px (increased by 30px). The height of the modal depends on the volume of content and it's up to 80% of the viewport.
All elements, eg. buttons, inputs, selects, etc., in a modal are always in medium size.
Advanced modal header
The header area always contains a title, and it can be supplemented by tabs, select, input, or another component.
Close button states
