Qt CSS -> QTabWidget

#include <QtGui>

int main(int argc, char * argv[])
{
    QApplication app(argc, argv);

    QString css = ".QFrame { padding-top: -30px; } QTabWidget::pane {border: 0; border-top: 30px solid qlineargradient(x1:0, y1:0, x2:0, y2:1, stop: 0 red, stop: 1 yellow); background: yellow; } QTabWidget::tab-bar { top: 30px; } ";

    app.setStyleSheet(css);

    QFrame frame;
    QVBoxLayout * lay = new QVBoxLayout(&frame);
    QTabWidget * wgt = new QTabWidget;
    wgt->addTab(new QPushButton, "Tab1");
    wgt->addTab(new QPushButton, "Tab2");
    lay->addWidget(wgt);

    lay->setContentsMargins(0, 0, 0, 0);

    frame.show();

    return app.exec();
}