Customise Universal Filter Plugin

To remove lines, use this code to Website > Website Tools > Custom CSS

.custom-filter-container.custom-filter-view-dropdowns.lite-dropdowns .customFiltersWrapper .archive-block-wrapper .archive-dropdown-toggle-label {
    border: none !important;
}

With spacing

Which spacing are you referring to?

With with

Use this code to Custom CSS box

body .cf-sticky-position-parent-node .customFiltersWrapper {
    max-width: 150px !important;
}
.custom-filter-position-left .custom-filter-grid.sqs-blog-list, .custom-filter-position-right .custom-filter-grid.sqs-blog-list, .custom-filter-position-left .custom-filter-grid:not(#productList):not(.ProductList-grid), .custom-filter-position-right .custom-filter-grid:not(#productList):not(.ProductList-grid) {
    float: right !important;
}