.title-button { 
    padding: 2px; margin:0; border-radius:0;
} 

notebook {
    border-top-width:0
}

notebook header {
	background-color: rgba(0,0,0,1);
    padding-top:1px;
}

notebook header label {
    font-size: 12px;
    font-weight:400;
}

notebook header tabs{
    margin-bottom: 1px;
}

notebook header tabs label {
    margin-left:3px;
}

notebook header tabs tab { 
    padding: 2px;
}

window headerbar toolbutton button {
    border-radius: 0;
}

notebook header tab, notebook header button, notebook header toolbutton,  notebook header label{
	background-color: rgba(0,0,0,1);
	color: rgb(240,240,240);
}

notebook header widget box {
    margin-bottom: 2px;
}