Remove Code Block with iFrame outline

Site URL: https://www.hulajuicebar.co.uk/reservations

Does anyone know how to remove the outline in the page here so the page looks seamless? It is an iFrame in a code block  and the border="0" so not sure how else to get rid of? Both the iframe and the page have the same colour so without border i was hoping nobody would see the difference. See pic below for what it looks like also

Thanks for help!

45 minutes ago, Peterbn said:

Site URL: https://www.hulajuicebar.co.uk/reservations

Does anyone know how to remove the outline in the page here so the page looks seamless? It is an iFrame in a code block  and the border="0" so not sure how else to get rid of? Both the iframe and the page have the same colour so without border i was hoping nobody would see the difference. See pic below for what it looks like also

 

Thanks for help!

 

 

try

iframe[src*=libroreserve] {
  border: none;
}