Hello,

1) Please replace the previous code with the following in the Global Custom CSS area under Theme Settings >> Custom CSS.

.category-grid-item .more-products {
display: none !important;
}

2) And for the search icon please add the following Custom CSS in the Custom CSS for Mobile area under Theme Settings >> Custom CSS.

.search-button .search-button-icon::before {
color: white;
}

3) Unfortunately, I am unable to provide you with the code of the default footer you need to import the demo base version for this.

Best Regards.