How can I adjust logo and font size on my checkout page?

Hello everyone!

The logo size on the checkout page is very large.
I specified the smallest size from Settings > Customize Checkout, but the size is still big. Also, the font size of the heading h2 is quite large.

The current settings are as follows.

logo size
max-width: min(100%, 350px);

h2 .n8k95w2 {
font-size: var(--x-heading-level1-font-size,var(--x-typography-size-extra-extra-large)); }

I added CSS to CSS files but I was not able to override the logo size and font size. How can I change it?

Do I need to subscribe to Shopify Plus to change the size of text and logos?

Is there a way to change without subscribing to the Plus plan?
Please let me know if there is any solution.

Please send the store url

I also checked other sites. That is a site that is not a member of plus.
You can determine whether you are subscribed to Plus or not by looking at the code.

On other sites, the logo size was 133px. I was unable to reduce the image size to 350px or less.
This means that you can make the logo size smaller than 350px without subscribing to plus.