QSlider::groove:horizontal {
	border: 1px solid #999999;
	height: 8px;
	background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #B1B1B1, stop:1 #c4c4c4);
	margin: 2px 0;
	border-radius: 5px;
}

QSlider::handle:horizontal {
	background: #ffffff;
	border: 1px solid #ffffff;
	width: 6px;
	margin: 0;
	border-radius: 4px;
}

#button_prev, #button_next {
	background: red;
	width: 27px;
	height: 27px;
	border-radius: 15px;
}

#button_pause, #button_play {
	background: red;
	width: 37px;
	height: 37px;
	border-radius: 20px;
}

#button_prev:pressed, #button_pause:pressed, #button_play:pressed, #button_next:pressed {
	background: green;
}