product-preview-card-component using basic html and css

.visually-hidden was the most difficult part of this project. I am not quite sure how part of the code below works. Any help will be greatly appreciated.

.visually-hidden:not(:focus):not(:active) {
  clip: rect(0 0 0 0); 
  clip-path: inset(50%);

  /* Shrink an element into a 1px square */
  width: 1px;
  height: 1px;

  /* Hiding any overflow */
  overflow: hidden;

  /* absolutely positioning the element to remove any trace of it from the normal document flow. */
  position: absolute;

  white-space: nowrap; 
}