.glow-divider {
  width: 60%;               /* Breite */
  /*margin: 10rem auto;        !* zentriert und Abstand oben/unten *!*/
  height: 1px;
  border: none;

  /* Farbverlauf: in der Mitte sichtbar, an den Enden transparent */
  background: linear-gradient(
    to right,
    rgba(255,255,255,0.3)   0%,
    rgba(255,255,255,0.8) 50%,
    rgba(255,255,255,0.3)   100%
  );

  /* Glow-Effekt um den Gradient-Strich */
  box-shadow:
    0 0 4px rgba(255,255,255,0.6),
    0 0 8px rgba(255,255,255,0.4);
}