.pd_border_block() when (@pd_bordered_block = true) and (@pd_block_background = @general_bg_color) and (@pd_shadow_block = false) {
        @media (min-width: 577px) {
            border: 1px solid contrast(@general_bg_color, @decorative, @base);
            box-shadow: 0 0 0 4px contrast(@general_bg_color, fade(@decorative, 15%), fade(@base5, 15%));
        }
        @media (max-width: 576px) {
            border: 3px solid contrast(@general_bg_color, @decorative, @base);
        }