Simple columns

ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff

Simple columns with -webkit-line-box-contain: block glyphs replaced;

Does not work with position: relative elements.

ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff

Columns containing a wrapper around the paragraph with left+right border

This uses a fixed size border inside the column. Messes up epub cfi (current page, location) in Foliate

ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff ff ff ff fff ffff fff f ff ff ff ff f fff f f f f f ff fff f ff ffff f ff f fff ff f f ff fffff