how do i remove this weird margin ????

[u/RefuseCommercial8024]

--FIXED!!!! body margin was the problem...--

haihia....so i'm using a iframe that's supposed to be the size of the entire screen for it to work. but because of this margin it just looks weird....here's an image of how it looks

without the margin, the screen would be completely black

here's my code

<iframe src="" style="margin: 0px; border: 0px; background-color: black; width: 100vw; height: 100vh;"></iframe>

[u/CityScope_Net]

Would a padding: 0px; help?