Eliminate iOS input zooming

[brettinternet]

TL;DR: If mobile font-sizes in text inputs are at least 16px, browsers on iOS devices won't zoom into the element when the user selects the input.

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Is your feature request related to a problem? Please describe.
Selecting (or "focusing" on) the search input on iOS devices makes the browser zoom into the element.

Describe the solution you'd like
Change the fontsize of the input to a value >= 16px.

Since the search input's fontsize is 1rem, I suppose you could also change the body element's fontsize to 16px for the same result.

While I'm here, you may also consider setting border-radius to 0 since some browsers add default styles to the input, or -webkit-appearance: none; might do the trick.

Describe alternatives you've considered
None

Additional context
Submitting this as a feature rather than a bug because it's a rather annoying nuance with iOS devices.

For more context, here's a similar submission I made to Meta StackOverflow: https://meta.stackoverflow.com/q/389464/6817437