QTabBar {
    background-color: transparent;
    background-image: none;
}
QTabWidget::tab-bar {
    left: 20px;
}
QTabBar::tab {
    margin: 0px -10px -1px 10px;
    border: 1px solid #77ffffff;
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
    padding: 5px 20px 5px 10px;
    box-shadow: -10px 10px lightblue;
}
QTabBar::close-button {
    padding-right: 10px;
}