.image-viewer {
    position: relative;
    height: 100%;
    width: 100%;
}

.image-viewer-toolbar {
    position: absolute;
    margin: 10px;
    top: 0;
    right: 0;
    border-radius: 8px;
    padding: 3px;
    width: 35px;
    background-color: white;
    opacity: 0.5;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

.image-viewer-toolbar .btn-save {
    color: MediumSeaGreen;
}

.image-viewer img {
    max-height: 100%;
    max-width: 100%;
}

.image-viewer canvas {
    border: 1px solid lightgray;
    height: 100%;
    width: 100%;
    background-color: rgb(245, 245, 245);
}