Bootstrap Focus State - Anyone notice Bootstrap's `input` focus state uses a `box-shadow` for their outline instead of… `outline`? What's up with that? : r/webdev
Box Shadows - Beautiful box shadows for TailwindCSS
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How to remove inner shadow from text inputs on Mobile Safari?
How to Customize a Field's Focus Color in a Bootstrap Form | Formden.com
firefox - How to assign inner shadow to inputs in CSS - Stack Overflow