.flat .dijitContentPane {
  background-color: #fff;
  padding: 8px;
}
.flat .dijitTabContainerTop-dijitContentPane,
.flat .dijitTabContainerLeft-dijitContentPane,
.flat .dijitTabContainerBottom-dijitContentPane,
.flat .dijitTabContainerRight-dijitContentPane,
.flat .dijitAccordionContainer-dijitContentPane {
  background-color: #fff;
  padding: 8px;
  left: 0 !important;
  top: 0 !important;
}