I have a problem with CSS

Hi guys! I have a problem with CSS.
https://pastebin.com/qFTrV9ap
When I run this code, on the screen there is an unwelcome scrolbar:
https://imgur.com/a/UfWxZvQ
Can you tell me why?

Comments

[Ashar Setiawan]

maybe you can set

display: inline-block;
height: auto;
overflow-y: auto;

[AndyBullet]

In this way?
display: inline-block;
margin-left: 20%;
margin-right: 10%;
height: auto;
width: 50%;
position: relative;
top: 100px;
overflow-y: auto;

[Ashar Setiawan]

yup, is that works?
it's better if you can set preview in codepen than pastebin

[AndyBullet]

codepen doesn't take images. However, adding that you told me doesn't work.

[Si]

Please review the sidebar and restructure your question. The #help tag will be removed in 24 hours if not done.

[AndyBullet]

My problem is solved.