.portal-card {
    opacity: 0;
    transform: translateY(16px);
}

.portal-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.portal-card.hiding {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.portal-card:hover {
    box-shadow: 0 12px 32px -8px rgba(99, 102, 241, 0.15);
}

@media (prefers-reduced-motion: reduce) {
    .portal-card,
    .portal-card.visible,
    .portal-card.hiding {
        transition: none;
        opacity: 1;
        transform: none;
    }
}