.zoom-indicator{
    position: fixed;
    top: calc(16px + env(safe-area-inset-top, 0px));
    right: calc(16px + env(safe-area-inset-right, 0px));
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
    pointer-events: none;
    opacity: 0;
    transition: opacity .3s ease;
    z-index: 2;
}
.zoom-indicator--visible{
    opacity: 1;
}