desktop-apps/win-linux/res/styles/styles.qss

#mainPanel {
    margin: 0;
    padding: 0;
    background: #f1f1f1;
}

#CX11Caption {
    min-width: 200px;
    background: #f1f1f1;
}

#labelAppTitle {
    color: #444;
    background: transparent;
    margin-top: -2px;
    font-size: 11px;
}

QPushButton {
    /*background-color:#d9d9d9;*/
    padding:0 20px;
    font-weight: normal;
    height: 22px;
    font-size: 12px;
}

QPushButton[act=tool] {
    /*background-origin: content;*/
    /*padding: 6px;*/
    border: none;
    margin: 0;
    padding: 0;
    border-radius:0;
}

QPushButton[act=tool]:hover {
    background-color:#cecece;
}

QPushButton[act=tool]:pressed {
    background-color:#b7b7b7;
}

QPushButton#toolButtonMaximize, QPushButton#toolButtonMain,
    QPushButton#toolButtonMinimize, QPushButton#toolButtonClose,
    QPushButton#toolButtonDownload {
        border: none;
        margin: 0;
        padding: 0;
        border-radius:0;
}

QPushButton#toolButtonMaximize,QPushButton#toolButtonMinimize,
    QPushButton#toolButtonClose {
        background-origin: content;
        padding: 5px 0px 7px;
}
QPushButton#toolButtonMaximize[kde=true], QPushButton#toolButtonMinimize[kde=true],
    QPushButton#toolButtonClose[kde=true] {padding: 2px 0px 7px;}

QPushButton#toolButtonClose:hover {
    background-color:#d42b2b;
}

QPushButton#toolButtonClose:pressed {
    background-color:#d75050;
}

QPushButton#toolButtonMaximize {
    image: url(:/restore.svg) center no-repeat;
}

QPushButton#toolButtonMaximize[class=min] {
    image: url(:/maximize.svg) center no-repeat;
}

QPushButton#toolButtonMinimize {
    image: url(:/minimize.svg) center no-repeat;
}

QPushButton#toolButtonClose {
    image: url(:/close.svg) center no-repeat;
}

QPushButton#toolButtonClose[class=normal][unix=false]:hover,
    QPushButton#toolButtonClose[class=normal][unix=false]:pressed {
        image: url(:/close_light.svg) center no-repeat;
}

QPushButton#toolButtonMain {
    background: #fff;
    font-size: 10px;
    font-family: 'Open Sans',sans-serif;
    font-weight: bold;
    border-right: 1px solid #f1f1f1;
}

/*QPushButton#toolButtonMain[theme=light] {*/
/*    border: 1px solid #b6b6b6;*/
/*    border-bottom: 0 none;*/
/*}*/

QPushButton#toolButtonMain[class=active],
    QPushButton#toolButtonMain[class=active]:hover
{
    color: #666666;
}

QPushButton#toolButtonMain[class=normal],
    QPushButton#toolButtonMain[class=normal]:hover
{
    color: #fff;
    border-bottom: 0 none;
}

QPushButton#toolButtonMain[class=normal]
{
    background: #f1f1f1;
    border-right-color: #dfdfdf;
}

QPushButton#toolButtonMain[class=normal]:hover {
    background: #cecece;
}

/*QPushButton#toolButtonMain[class=normal][theme=light],*/
    /*QPushButton#toolButtonMain[class=normal][theme=light]:hover*/
/*{*/
    /*border: 0 none;*/
    /*border-bottom: 1px solid #b6b6b6;*/
/*}*/

QPushButton::menu-indicator {width: 0px; height: 0px;}

/*QPushButton[theme=dark]::menu-indicator {*/
    /*border-image: url(:/res/icons/menu-indicator-dark.png) 0 0 0 0 repeat repeat;*/
/*}*/

/*QPushButton[theme=dark]::menu-indicator:disabled {*/
    /*border-image: url(:/res/icons/menu-indicator-dark.png) 0 0 0 10 repeat repeat;*/
/*}*/

/*QPushButton[theme=dark]::menu-indicator:hover {*/
    /*border-image: url(:/res/icons/menu-indicator-dark.png) 0 10 0 0 repeat repeat;*/
/*}*/

QPushButton#toolButtonDownload {border-right: 1px solid #dfdfdf; max-width: 40px; width: 40px; max-height: 28px; height: 28px;}

/**************************/
/* dark theme definitions */
/**************************/

#mainPanel[uitheme=theme-dark],
#mainPanel[uitheme=theme-dark] #CX11Caption {
    background-color: #404040;
}

#mainPanel[uitheme=theme-dark] #labelAppTitle {
    color: #d9d9d9;
}

#mainPanel[uitheme=theme-dark] QPushButton#toolButtonDownload,
#mainPanel[uitheme=theme-dark] QPushButton#toolButtonMain {
    border-right-color: #333;
}

#mainPanel[uitheme=theme-dark] QPushButton#toolButtonMain[class=active] {
    background: #333;
}

#mainPanel[uitheme=theme-dark] QPushButton#toolButtonMain[class=normal] {
    background: #404040;
    border-right-color: #505050;
}

#mainPanel[uitheme=theme-dark] QPushButton#toolButtonMain[class=normal]:hover {
    background: #555;
}

#mainPanel[uithemetype=dark] QPushButton#toolButtonMaximize {
    image: url(:/restore_light.svg) center no-repeat;
}

#mainPanel[uithemetype=dark] QPushButton#toolButtonMaximize[class=min] {
    image: url(:/maximize_light.svg) center no-repeat;
}

#mainPanel[uithemetype=dark] QPushButton#toolButtonMinimize {
    image: url(:/minimize_light.svg) center no-repeat;
}

#mainPanel[uithemetype=dark] QPushButton#toolButtonClose {
    image: url(:/close_light.svg) center no-repeat;
}

#mainPanel[uitheme=theme-dark] QPushButton#toolButtonMinimize:hover,
    #mainPanel[uitheme=theme-dark] QPushButton#toolButtonMaximize:hover,
    #mainPanel[uitheme=theme-dark] QPushButton#toolButtonDownload:hover
{
    background-color: #555;
}

#mainPanel[uitheme=theme-dark] QPushButton#toolButtonMinimize:pressed,
    #mainPanel[uitheme=theme-dark] QPushButton#toolButtonMaximize:pressed,
    #mainPanel[uitheme=theme-dark] QPushButton#toolButtonDownload:pressed
{
    background-color: #606060;
}

/* Contrast-Dark*/

#mainPanel[uitheme=theme-contrast-dark],
#mainPanel[uitheme=theme-contrast-dark] #CX11Caption {
    background-color: #2a2a2a;
}

#mainPanel[uitheme=theme-contrast-dark] #labelAppTitle {
    color: #d9d9d9;
}

#mainPanel[uitheme=theme-contrast-dark] QPushButton#toolButtonMain[class=active] {
    background: #1e1e1e;
}

#mainPanel[uitheme=theme-contrast-dark] QPushButton#toolButtonDownload,
#mainPanel[uitheme=theme-contrast-dark] QPushButton#toolButtonMain {
    border-right-color: #1e1e1e;
}

#mainPanel[uitheme=theme-contrast-dark] QPushButton#toolButtonMain[class=normal] {
    background: #2a2a2a;
    border-right-color: #414141;
}

#mainPanel[uitheme=theme-contrast-dark] QPushButton#toolButtonMain[class=normal]:hover {
    background: #424242;
}

#mainPanel[uitheme=theme-contrast-dark] QPushButton#toolButtonMinimize:hover,
    #mainPanel[uitheme=theme-contrast-dark] QPushButton#toolButtonMaximize:hover,
    #mainPanel[uitheme=theme-contrast-dark] QPushButton#toolButtonDownload:hover
{
    background-color: #555;
}

/***********************************/
/* classic light theme definitions */
/***********************************/

#mainPanel[uitheme=theme-classic-light] QPushButton#toolButtonMain {
    border-right-color: #f1f1f1;
}

#mainPanel[uitheme=theme-classic-light] QPushButton#toolButtonMain[class=normal] {
    border-right-color: #cbcbcb;
}


/* ToolTip*/

#CToolTip>QLabel {
    min-height: 26px;
    margin: 0px;
    padding-left: 10px; padding-right: 10px;
    padding-top: 0px; padding-bottom: 0px;
    color: #373737;
    font-family: "Arial", "Helvetica", "Helvetica Neue", sans-serif;
    font-size: 11px;
    font-weight: normal;
    qproperty-alignment: AlignCenter;
    border: 1px solid #c0c0c0;
    border-radius: 4px;
    background-color: #ffffff;
    background-clip: border-box;
}
#mainPanel[uitheme=theme-dark] #CToolTip>QLabel {
    margin: 0px;
    border: 1px solid #666666;
    color: #d2d2d2;
    background-color: #333333;
}
#mainPanel[uitheme=theme-contrast-dark] #CToolTip>QLabel {
    margin: 0px;
    border: 1px solid #696969;
    color: #d2d2d2;
    background-color: #212121;
}