style.qss

/* QMainWindow - Main widget styles */
QApplication, QMainWindow, QVBoxLayout, QHBoxLayout, QWebEngineView, QDialog, QFrame {
  background-color: black;
}

QListWidget {
  border: 10px solid black;
  background-color: black;
}

QLabel {
  color: white;
}

/* QScrollBar - Dark Theme */
QScrollBar:vertical {
  background: #2A2A2A;
  width: 15px;
  margin: 15px 0 15px 0;
}

QScrollBar::handle:vertical {
  background: #5A5A5A;
  min-height: 30px;
}

QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {
  background: none;
  height: 0;
  width: 0;
  subcontrol-origin: margin;
}

QScrollBar:horizontal {
  background: #2A2A2A;
  height: 15px;
  margin: 0 15px 0 15px;
}

QScrollBar::handle:horizontal {
  background: #5A5A5A;
  min-width: 30px;
}

QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal {
  background: none;
  height: 0;
  width: 0;
  subcontrol-origin: margin;
}