.glowing-edge-line {
  position: fixed;
  inset: 0; /* Stretches the box around the edges of the webpage */
  pointer-events: none; /* Lets clicks pass through the frame */
  border: 4px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 15px #ff0000, inset 0 0 15px #ffffff;
  animation: glowFadeLoop 5s ease-in-out infinite;
}

@keyframes glowFadeLoop {
  0%, 100% {
    opacity: 0.2;
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 5px rgba(255, 0, 0, 0.2), inset 0 0 5px rgba(255, 255, 255, 0.2);
  }
  50% {
    opacity: 1;
    border-color: rgba(255, 0, 0, 1);
    box-shadow: 0 0 25px #ff0000, 0 0 40px #ffffff, inset 0 0 20px #ff3333;
  }
}