#calendarLoader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.75);
    display: none; /* di default nascosto */
    align-items: center;
    justify-content: center;
    z-index: 9999;
}
#calendarLoader:not(.hidden) {
    display: flex; /* Mostra il loader quando necessario */
}

#calendarLoader .spinner {
    width: 60px;
    height: 60px;
    border: 6px solid #ccc;
    border-top-color: #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}