.rainbow-border {
  position: relative;
  padding: 4px;
  background: linear-gradient(135deg, #FFCC29, #AF2040, #E9258C, #009ACC, #00A659);
  border-radius: 0.5rem; 
}

.rainbow-border .card-body {
  background-color: white; 
  border-radius: 0.5rem;
  padding: 1.5rem;
}