body, html {
	background-color: #000;
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
}

.background {
    position: absolute;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-repeat: no-repeat;
    transition: opacity 2s ease-in-out;
    opacity: 1;
}