<style>
#giveaway-ninja-embed { margin: 0 auto; width: 500px; }
@media only screen and (max-width: 500px) {
#giveaway-ninja-embed { width: calc(100vw); }
}
</style>
<div id="giveaway-ninja-embed" data-id="64ee3e1de8561610f04d5d8c"></div>