How to turn off the stroke except for the outline and border commands?

Question

css

Such a problem, when you click on the cross, a blue stroke appears ...
(link to the screen)
https://cdn.discordapp.com/attachments/50354305422... I
use the outline command, as well as the border command, and it still does not remove.
Please help me solve the problem.
HTML code CSS code
<button class="popup-close">&times;</button>

.popup-close {
  position: absolute;
  top: 0;
  right: 0;
  -webkit-transform: translateX(105%) translateY(-40%);
  transform: translateX(105%) translateY(-40%);
  background-color: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 20px;
  font-weight: 900;
 }

Answer 1

try to remove on hover, focus, active