.spinner {
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.fade-transition {
    transition: opacity 300ms ease, transform 300ms ease;
}
.fade-out {
    opacity: 0;
    transform: translateY(-6px);
}