.loaderBackground {
    position: fixed;   /* change this */
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;     /* change this */

    display: none;
    justify-content: center;
    align-items: center;

    z-index: 5;

    background-color: rgba(0, 0, 0, 0.5);
}

.loader {
    border: 12px solid #f3f3f3; /* Light grey */
    border-top: 12px solid #3498db; /* Blue */
    border-radius: 50%;
    width: 70px;
    height: 70px;
    animation: spin 2s linear infinite;
 }

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