style.css

/* CSS reset  */
html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
}

/* Fitting the elements we created to the screen */
#camera, #camera-view, #camera-sensor, #camera-output {
    position: fixed;
    height: 100%;
    width: 100%;
    object-fit: cover;
}

/* to mirror the image to make it feel more natural */
#camera-view, #camera-sensor, #camera-output {
    transform: scaleX(-1);
    filter: FlipH;
}

/* setting the position property for camera-trigger to fixed and to center it on the bottom of the screen */
#camera-trigger {
    width: 200px;
    background: color #000000;
    color: #fff;
    font-size: 16px;
    border-radius: 30px;
    border: none;
    padding: 15px 20px;
    text-align: center;
    box-shadow: 0 5px 10px 0 rgba(0, 0, 0, 0.2);
    position: fixed;
    bottom: 30px;
    left: calc(50% - 100px);
}

/* styling for the image after it's taken... */
.taken {
    height: 100px !important;
    width:  100px  !important;
    transition: all 0.5s ease-in;
    border: solid 3px #fff;
    box-shadow: 0 5px 10px 0 rgba(0, 0, 0, 0.2);
    top: 20px;
    right: 20px;
    z-index: 2;
}