how to make images smaller on mobile view?

Site URL: https://www.jasmine-noronha.com

hello! i'd like to resize the images on the "film" section in mobile view. can someone advise on the code to do this?

thanks!

@tuanphan please help! thanks

Try adding to Home > Design > Custom CSS

@media screen and (max-width:640px) {
.index-item-height-medium:not(.index-item-width-grid) .index-item {
    width: 90%;
    margin: 0 auto;
}
}