QTabBar {
    background-color: transparent;
    background-image: none;
}
QTabWidget::tab-bar {
    left: 10px;
}
QTabBar::tab {
    margin: 0px -15x -1px 10px;
    border: 1px solid #77ffffff;
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
    padding: 5px 20px 5px 10px;
}
QTabBar::close-button {
    padding-right: 10px;
}
QTabBar::tab:selected, QTabBar::tab:hover {
    background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,
                                stop: 0 #00000000, stop: 0.4 #44d68787,
                                stop: 0.5 #66d68787, stop: 1.0 #bbd68787);
}
QTabBar::tab:!selected {
    margin-bottom: -5px;
    padding-bottom: 0px;
}