In some cases IE11 handles CSS specifity differently than other browsers such as Chrome and Firefox. You might need to prefix your CSS classes with .giosg_dialog_container to ensure that they are used or add the element tag type to the selector. For example if you have the class selector for a div element:
.my-class {
property: value;
}
You can change it to:
div.my-class {
property: value;
}
So the selector will have bit more specificity. The other option to add specificity to your selectors is to add !important to individual CSS rules, but this is in most cases not recommended.
