Mailspring/internal_packages/mode-switch/stylesheets/mode-switch.less

@import 'ui-variables';

.mode-switch {
    z-index: 1000;
    position: relative;

    .handle {
      position:absolute;
      transition: left .2s ease-out;
    }
}
.mode-toggle {
    z-index: 1000;
    position: relative;

    .colorfill {
        background-color: @component-active-color;
    }
}