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“We ought to take outdoor walks in order that the mind may be strengthened and refreshed by the open air and much breathing.".
Seneca

:focus-visible

The :focus-visible pseudo-class applies while an element matches the :focus pseudo-class and the UA (User Agent) determines via heuristics that the focus should be made evident on the element. (Many browsers show a "focus ring" by default in this case.)
:focus-visible css reference