.mute-button {
  position: absolute;
  top: 10px;
  left: 10px;
  background-color: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  padding: 5px 10px;
  cursor: pointer;
  z-index: 1000;
}

.mute-button:focus {
  outline: none;
}