Adapt background image to section

[Luca93]

Good evening, can anyone tell me how to adapt a background image inserted into a section in the Shopify Dawn theme, in CSS? Because once inserted the image appears "enlarged" while I would like it to adapt to the proportions of the container itself.

I insert this code: > * { background: url("Image URL") !important; }

but then I no longer know how to adapt everything.
Thanks in advance.

[Abdosamer]

you can add this property to the image :

background-size: cover;

[Made4uo-Ribe]

Hi @Luca93 

Try to add this one. 

background-size: cover; 
 background-repeat: no-repeat;

Or 

background-size: contain;
  background-repeat: no-repeat;

And Save. 

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[Luca93]

I tried, but it doesn't work