CSS all Property: unset, revert, initial

Parent: bg #2c3e50, color white, Georgia, 18px, line-height 1.8, letter-spacing 1px

[all: unset] This child uses all: unset - inherits inheritable properties from parent, removes non-inheritable ones.

[all: revert] This child uses all: revert - reverts to the browser's default stylesheet values.

[all: initial] This child uses all: initial - resets all properties to their CSS spec initial values.

Expected differences:

unset: Inherits color (white), font-family (Georgia) from parent; loses background, border from parent
revert: Gets browser defaults (black text, Times/serif, default margins)
initial: Gets CSS initial values (black text, no font preference, normal line-height)