body {
}

.camera-container {
    position: relative;
    width: 100%;
}

    .camera-container video {
        width: 100%;
    }

.document-frame {
    position: absolute;
    top: 10%;
    left: 10%;
    width: 80%;
    height: 80%;
    border: 3px solid lime;
    pointer-events: none;
}