Apex domains cannot have CNAME records.
Question and response
Question
dig panarea-villa.com. NS
Answer
panarea-villa.com. 5 NS ns-1.awsdns-00.com.
panarea-villa.com. 5 NS ns-85.awsdns-10.com.
panarea-villa.com. 5 NS ns-224.awsdns-28.com.
panarea-villa.com. 5 NS ns-668.awsdns-19.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0