Apex domains cannot have CNAME records.
Question and response
Question
dig cazino-z.com. NS
Answer
cazino-z.com. 5 NS ns-1682.awsdns-18.co.uk.
cazino-z.com. 5 NS ns-1456.awsdns-54.org.
cazino-z.com. 5 NS ns-611.awsdns-12.net.
cazino-z.com. 5 NS ns-1579.awsdns-05.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0