@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

.group-card {
    transition: all 0.3s ease;
}

.group-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Color classes for group cards */
.bg-group-1 { background-color: #EFF6FF; }
.bg-group-2 { background-color: #F0FDF4; }
.bg-group-3 { background-color: #FEF2F2; }
.bg-group-4 { background-color: #FFF7ED; }
.bg-group-5 { background-color: #F5F3FF; }
.bg-group-6 { background-color: #ECFDF5; }

/* Responsive adjustments */
@media (max-width: 640px) {
    #groupsContainer {
        grid-template-columns: 1fr;
    }
}