.opht-svg-container {
    width: 100%;
    margin: 0 auto;
    overflow: visible;
}

#OPHT-farb {
    /* Set origin to right-center so scaling pushes to left, top, bottom */
    transform-origin: 69% center;
    /* Hardware acceleration for smoother animation */
    will-change: transform, filter;
}

.opht-stroke {
    /* Smooth transition for stroke width */
    will-change: stroke-width;
}