Ejemplos de Sintaxis:

https://carbon.now.sh/?bg=rgba(255%2C255%2C255%2C0)&t=seti&wt=none&l=css&width=680&ds=true&dsyoff=20px&dsblur=68px&wc=true&wa=true&pv=56px&ph=56px&ln=false&fl=1&fm=Hack&fs=14px&lh=133%25&si=false&es=2x&wm=false&code=.Bloque%257B%257D

https://carbon.now.sh/?bg=rgba(255%2C255%2C255%2C0)&t=seti&wt=none&l=css&width=680&ds=true&dsyoff=20px&dsblur=68px&wc=true&wa=true&pv=56px&ph=56px&ln=false&fl=1&fm=Hack&fs=14px&lh=133%25&si=false&es=2x&wm=false&code=.Bloque__elemento%257B%257D

https://carbon.now.sh/?bg=rgba(255%2C255%2C255%2C0)&t=seti&wt=none&l=css&width=680&ds=true&dsyoff=20px&dsblur=68px&wc=true&wa=true&pv=56px&ph=56px&ln=false&fl=1&fm=Hack&fs=14px&lh=133%25&si=false&es=2x&wm=false&code=.Bloque--modificador%257B%257D


Notas Relacionadas:

BEM CSS

Metodologías CSS