#toastContainer {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2000; /* above modals */
    width: 100%;
    display: flex;
    justify-content: center;
    pointer-events: none; /* allow clicks through container */
}

#toastContainer .toast {
    max-width: 350px;
    width: 90%;
    pointer-events: auto; /* enable toast interactions */
}