[Python] How to remove this black stuff and weird lines from my QTableView?

So I want my QTableView to be like rounded and have shadow. When I added a border-radius, the problem then started

screenshot

currently my qss is this:

#reservations_table_view {
border: transparent;
background-color: white;
color: black;
border-bottom-left-radius: 10px;
border-bottom-right-radius: 10px
}

#reservations_table_view QHeaderView::section {
background-color: #F1F1F1;
color: black;
border: none;
padding: 5px;
}

#reservations_table_view QTableCornerButton::section {
background-color: #F1F1F1;
border: none;
border-top-left-radius: 10px;
}

#reservations_table_view QHeaderView::section:first {
border-top-left-radius: 10px;
}

#reservations_table_view QHeaderView::section:last {
border-top-right-radius: 10px;
}

Continue reading...