.archiv-banner {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(90deg, #4a3f6b, #6b5b95);
  color: #ffffff;
  text-align: center;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.2px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.25);
}
.archiv-banner strong {
  font-weight: 700;
}