PASS Simple substitution test
PASS You can't build up a single token where part of it is provided by a variable
PASS Multiple variable references in a single property
PASS Multiple variable references in a single property (no spaces)
PASS Fallback value
PASS Fallback value which is also a variable reference
PASS Multiple var references in fallback value
PASS Multiple nested fallbacks
PASS Bad variable reference that should inherit by default
PASS Test that var reference doesn’t overwrite !important
PASS Test that !important on a property that has a variable reference can overwrite !important
PASS Test that !important inside of var reference can't overwrite !important on property