.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.option-btn {
    transition: all 0.2s ease;
}

.option-btn:active {
    transform: scale(0.98);
}

.pulse-red {
    animation: pulse-red 1s infinite;
}
@keyframes pulse-red {
    0% { color: #ef4444; }
    50% { color: #b91c1c; }
    100% { color: #ef4444; }
}