jellyfin-web/src/components/toast/toast.css

.toast {
    position: fixed;
    min-width: 20em;
    box-sizing: border-box;
    box-shadow: 0 0.0725em 0.29em 0 rgba(0, 0, 0, 0.37);
    border-radius: .15em;
    cursor: default;
    transition: transform .3s ease-out;
    min-height: initial;
    padding: 1em 1.5em;
    bottom: 1em;
    left: 1em;
    font-size: 110%;
    z-index: 9999999;
    transform: translateY(16em);
}

.toastVisible {
    transform: none;
}