html, body {
	position: relative;
	width: 100%;
	height: 100%;
}

html {
	background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8Xw8AAoMBgDTD2qgAAAAASUVORK5CYII=);
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
	background-repeat:no-repeat;
	background-position: center center;
	transition: background-image 1s ease-in-out;
}

/* full screen */
::backdrop {
    background-color: rgba(255,255,255,0);;
}

body {
	color: #333;
	margin: 0;
	padding: 8px;
	box-sizing: border-box;
	/*font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;*/
	font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

a {
	color: rgb(0,100,200);
	text-decoration: none;
}

a:hover {
	text-decoration: underline;
}

a:visited {
	color: rgb(0,80,160);
}

label {
	display: block;
}

input, button, select, textarea {
	font-family: inherit;
	font-size: inherit;
	padding: 0.4em;
	margin: 0 0 0.5em 0;
	box-sizing: border-box;
	border: 1px solid #ccc;
	border-radius: 2px;
}

input:disabled {
	color: #ccc;
}

input[type="range"] {
	height: 0;
}

button {
	background-color: #f4f4f4;
	outline: none;
}

button:active {
	background-color: #ddd;
}

button:focus {
	border-color: #666;
}