/* glänzender Effekt für Bootstrap-Buttons */
.btn-shiny {
  position: relative;
  overflow: hidden;
  /* oben heller, unten dunkler */
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.3),   /* Lichtkante oben */
    inset 0 -12px 3px rgba(0,0,0,0.1),     /* Schatten unten */
    0 0px 15px 5px rgba(0,0,0,0.2);             /* äußerer Drop-Shadow */
}


.btn-shiny::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 40%;
  background: rgba(255,255,255,0.3);
  border-radius: inherit;
  pointer-events: none;
}
.btn-shiny:hover::before {
  background: rgba(255,255,255,0.35);
}