Sources

Mobile-First Indexing

Google Developers
https://developers.google.com/search/docs/crawling-indexing/mobile/mobile-sites-mobile-first-indexing as of April 1, 2025

User Experience Statistics

Zippia
https://www.zippia.com/advice/user-experience-statistics/ as of April 1, 2025

Web Design Mobile First

Squarespace Blog
https://www.squarespace.com/blog/web-design-mobile-first as of April 1, 2025

HTML Responsive Web Design

W3Schools
https://www.w3schools.com/html/html_responsive.asp as of April 1, 2025

Mobile-First Design Explanation

GeeksForGeeks
https://www.geeksforgeeks.org/mobile-first-design/ as of April 1, 2025

CSS Viewport Guide

W3Schools
https://www.w3schools.com/css/css_rwd_viewport.asp as of April 1, 2025

Responsive Flexbox

W3Schools
https://www.w3schools.com/css/css3_flexbox_responsive.asp as of April 1, 2025

Accessible Tap Targets

Smashing Magazine
https://www.smashingmagazine.com/2023/04/accessible-tap-target-sizes-rage-taps-clicks/ as of April 1, 2025