/* Bild-Blinkeffekt: 2 Sekunden hell, 2 Sekunden dunkler */
.blink-bild {
  animation: bildBlink 4s infinite;
}

@keyframes bildBlink {
  0%   { filter: brightness(100%); }
  49%  { filter: brightness(100%); }

  50%  { filter: brightness(50%); }
  99%  { filter: brightness(50%); }

  100% { filter: brightness(100%); }
}