IMPORTANT NOTE: as of Sept. 2025 anchor positioning only works in Chromium browsers. There is a polyfill: https://github.com/oddbird/css-anchor-positioning, BUT IT DOES NOT WORK RELIABLY AT ALL, SO ANCHOR POSITIONING CANNOT BE USED YET. FIREFOX AND SAFARI SAY THEY WILL BE IMPLEMENTING SUPPORT IN FALL 2025 -->
Due to the somewhat complicated nature of Kevin Powells original tutorial, I have broken my writen tutorials in to 4 parts. This is the first. Subsequent tutorials note the changes in code from the preceeding tutorial