body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  background-image: url('../images/login-bg.png'); /* z. B. /static/bg.png */
  background-size: 100% 100%;
  background-position: center center;
  background-repeat: no-repeat;
  background-color: #000; /* optionaler Fallback-Hintergrund */
  font-family: sans-serif;
  overflow: hidden;
}

.logotext {
    color: #fff;
}

@keyframes redBlink {
  0%, 100% {
    box-shadow: 
      0 4px 12px rgba(255, 0, 0, 0.15),   /* roter Glanz */
      0 6px 20px rgba(0, 0, 0, 0.25);     /* dunkler Schlagschatten */
  }
  50% {
    box-shadow: 
      0 4px 18px rgba(255, 0, 0, 0.35),   /* stärkerer roter Glanz */
      0 8px 25px rgba(0, 0, 0, 0.35);
  }
}

.card {
  background-color: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 2rem;
  width: 400px;
  margin: auto;
  color: #fff;
  animation: redBlink 2.5s ease-in-out infinite;
}

.card-body.login-card-body {
  border-radius: 16px; /* oder z. B. 12px für dezenteren Effekt */
}