Mobile browsers auto-zoom when focusing on input fields

## Problem

On mobile browsers (especially iOS Safari), focusing on an input field triggers an automatic page zoom. This is a well-known browser behavior that occurs when an input element has a `font-size` smaller than **16px**.

This is disruptive to the user experience — the page zooms in unexpectedly and doesn't zoom back out after the input loses focus.

## Expected behavior

Tapping an input field should not cause the page to zoom on mobile devices.

## Suggested fix

Ensure all input elements (`input`, `select`, `textarea`) have a `font-size` of at least `16px`:

```css
input,
select,
textarea {
font-size: 16px;
}
```

This prevents the auto-zoom while keeping the page accessible (users can still manually zoom if needed).

An alternative would be to set `maximum-scale=1` in the viewport meta tag, but this **disables user zooming entirely**, which is harmful for accessibility and is not recommended.

## Environment

- Affected: mobile browsers (notably iOS Safari)
- Likely occurs on any input with a font-size below 16px

Search the frontend styles for input, select, and textarea rules and inspect their current font sizes. Verify the affected fields on a mobile browser, then confirm that focusing them no longer triggers automatic zoom while user zooming remains available.

Written by the indexing model from the issue text.