#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(255, 255, 255, 0.8);
    align-items: center;
    justify-content: center;
    z-index: 9999;
    display: none;              /* Caché par défaut */
    pointer-events: all;        /* Capture tous les clics */
    cursor: wait;
}
/* Spinner circulaire */
.spinner {
    border: 8px solid #f3f3f3;
    border-top: 8px solid #3498db;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

/* Animation */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}