Explain the role of the ':focus-visible' pseudo-class in enhancing web usability.
Instruction: Describe how ':focus-visible' can be used to improve accessibility and usability in web design.
Context: This question tests the candidate's understanding of the ':focus-visible' pseudo-class, a CSS feature aimed at improving accessibility by providing visual feedback on elements that have focus.
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At its core, :focus-visible targets improving the user experience for keyboard users without cluttering the interface with focus indicators for mouse users, which might be deemed unnecessary or visually distracting. For instance, when a user navigates a webpage using a keyboard, typically by tabbing through interactive elements such as links, buttons, or form inputs, :focus-visible can be used to apply specific styles to the focused element...