style.css

QMainWindow > QStackedWidget {
    border-top: 1px solid #a0a0a0;
}

QStatusBar QToolBar {
    padding:0;
    spacing:0;
    margin:0;
    border:0;
}

QStatusBar::item {
    border:0;
}

QStatusBar QToolButton::menu-indicator {
    image: none;
}

AppsWidget {
    background-color: palette(window);
    border-top: 1px solid #808080;
}

QSlider::groove:horizontal {
     border: 1px solid #808080;
     height: 8px; /* the groove expands to the size of the slider by default. by giving it a height, it has a fixed size */
     background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #B1B1B1, stop:1 #ccc);
     border-radius: 5px;
 }

QSlider::sub-page:horizontal {
    border: 1px solid #808080;
    height: 8px; /* the groove expands to the size of the slider by default. by giving it a height, it has a fixed size */
    background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #6c6c6c, stop:1 #B1B1B1);
    border-radius: 5px;
}

QSlider::handle:horizontal {
    border: 1px solid #5c5c5c;
    width: 14px;
    height: 16px;
    margin: -4px 0; /* handle is placed by default on the contents rect of the groove. Expand outside the groove */
    border-radius: 8px;
    background: qradialgradient(
        cx: .5, cy: .5,
        fx: .33, fy: .33,
        radius: .5,
        stop: 0 #fff, stop: 1 #ccc);
}

QSlider::handle:pressed {
    background: qradialgradient(
        cx: .5, cy: .5,
        fx: .33, fy: .33,
        radius: .5,
        stop: 0 #ccc, stop: 1 #9c9c9c);
}

Phonon--SeekSlider QSlider::sub-page:horizontal {
    border: 1px solid #808080;
    background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #B1B1B1, stop:1 #6c6c6c);
}

Phonon--VolumeSlider[zero="true"] QSlider::handle:horizontal {
    background: qradialgradient(
        cx: .5, cy: .5,
        fx: .33, fy: .33,
        radius: .5,
        stop: 0 #f66, stop: 1 #c33);
}

/* Regions */

RegionsView QPushButton[regionId] {
    margin: 5px;
    padding: 7px 10px;
    text-align: left;
    vertical-align: middle;
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: 5px;
}

RegionsView QPushButton[regionId=""] {

}

RegionsView QPushButton[regionId]:hover {
    border: 1px solid rgba(0,0,0,32);
    background: rgba(0,0,0,16);
}

RegionsView QPushButton[regionId]:focus {
    border: 1px solid palette(highlight);
    background: rgba(0,0,0,16);
}

RegionsView QPushButton[regionId]:checked {
    color: #fff;
    border: 1px solid rgba(0,0,0,64);
    background: qradialgradient(cx: 0.5, cy: 0,
    fx: 0.5, fy: 0,
    radius: 1.35, stop: 0 rgba(0,0,0,128), stop: 1 rgba(0,0,0,64));
}

/* Sidebar */

SidebarHeader {
    background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,
                         stop: 0 #262626, stop: 1 #3c3c3c);
    padding: 0;
    margin: 0;
    spacing: 0;
    border-bottom: 1px solid black;
}

SidebarHeader QToolButton {
    border: 0;
    padding: 0;
    margin: 0;
    spacing: 0;
    height: 20;
    width: 24;
}

SidebarHeader QPushButton {
    background: transparent;
    color: #fff;
    text-align: center;
}

SidebarHeader QComboBox::drop-down {
    width: 0;
    border-style: none;
}

QLabel[recentHeader="true"] {
    color: rgba(0,0,0,128);
}