Change a gallery block with thumbnails from sqaure edges to radiused

Hi,

I am trying to create a gallery block with thumbnails however I want the images to have rounded corners. Does anyone know of a code I can input that will change this for me for both the main image and the thumbnails?

Thank you!

You can use this code to Website > Website Tools > Custom CSS

div.slide {
    border-radius: 20px;
}
div.sqs-gallery-thumbnails div img {
    border-radius: 20px;
}