multiple-select-vanilla/dist/styles/css/themes/bootstrap.css

.ms-parent.form-control{border-radius:var(--ms-parent-form-control-border-radius,4px);height:100%;padding:var(--ms-parent-form-control-padding,0)}.ms-parent.form-control .ms-choice{border:var(--ms-choice-border,0);height:100%}.ms-parent.form-control .ms-choice>span{top:50%;transform:translateY(-50%)}.ms-parent.form-control.form-control-sm .ms-drop input[type=checkbox],.ms-parent.form-control.form-control-sm .ms-drop input[type=radio]{margin-top:var(--ms-drop-input-sm-margin-top,ms-drop-input-sm-margin-top)}.ms-parent.form-control.form-control-lg .ms-drop input[type=checkbox],.ms-parent.form-control.form-control-lg .ms-drop input[type=radio]{margin-top:var(--ms-drop-input-lg-margin-top,.5rem)}.ms-parent.form-control.ms-dropdown .ms-drop ul>li.group.hide-radio label.optgroup{color:var(--ms-drop-hide-radio-color,#6c757d);font-size:var(--ms-drop-hide-radio-font-size,87.5%);margin-bottom:var(--ms-drop-hide-radio-margin-bottom,0);opacity:var(--ms-drop-hide-radio-opacity,1);white-space:nowrap}.ms-parent.form-control.ms-dropdown .ms-drop ul>li.hide-radio.option-level-1 label{padding-left:var(--ms-drop-hide-radio-option-level1-padding-left,8px)}.ms-parent.form-control.ms-dropdown.ms-dropdown-divider .ms-drop ul>li.group.hide-radio label.optgroup{border-top:var(--ms-dropdown-divider-group-border-top,1px solid #e9ecef)}.ms-parent.form-control.ms-dropdown.ms-dropdown-divider .ms-drop ul>li.group:first-child label.optgroup{border-top:var(--ms-dropdown-divider-first-group-border-top,none)}