Remove White Background Margins

Previously, the page did not have any white space on the left and right sides. However, the white background has suddenly appeared, and I’m not sure why. The expected result is to remove the white background as before.

here is the code

<div    style="position: relative; box-sizing: content-box; max-height: 80vh; max-height: 80svh; width: 100%; aspect-ratio: 1.52; padding: 40px 0 40px 0; ">    <iframe src="https://app.supademo.com/embed/cmha4dc0s07ha300ihemm2szc?embed_v=2&utm_source=embed" loading="lazy"        title="Explore how compass work" allow="clipboard-write" frameborder="0" webkitallowfullscreen="true"        mozallowfullscreen="true" allowfullscreen        style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;"></iframe></div>