I saw this in my timeline yesterday: Released css-aspect-ratio, a tiny module for preserving aspect ratios in pure CSS w/ custom properties. Take a look! https://t.co/CgUgv1ptaw — Sérgio Gomes (@sergiomdgomes) March 1, 2017 This is a very clever use of pseudo-element as the box layout is dictated by the styling of ::before rather than the padding of the box. Using the “padding hack”[1] on the cont