body {
    height: 100%;
    width: 100%;
    position: absolute;
    background-color: white;
}

/* css style for centered image and set as responsive */
.centered-image {
    display: block;
    margin-left: auto;
    margin-right: auto;
    max-width: 100%;
    height: auto;
}

.responsive500 {
    width: 100%;
	max-width: 500px;
	height: auto;
	display: block;
	margin-left: auto;
	margin-right: auto;
}

.responsive600 {
    width: 100%;
	max-width: 600px;
	height: auto;
	display: block;
	margin-left: auto;
	margin-right: auto;
}

.responsive1080 {
    width: 100%;
	max-width: 1080x;
	height: auto;
	display: block;
	margin-left: auto;
	margin-right: auto;
}

.responsive1920 {
    width: 100%;
	max-width: 1920px;
	height: auto;
	display: block;
	margin-left: auto;
	margin-right: auto;
}