*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    width: 100vw;
    height: 100vh;
    overflow: scroll;
}

#Loire{
	width: 100%;
    position: relative;
}

#Loire img{
	width: 100%;
	position: absolute;
}
#Loire svg{
	width: 100%;
    position: absolute;
    top: 0;
    left: 0;
	z-index: 14;
}
/* Eau */
#eau{
	opacity: 1;
	z-index: 9;
}
#eauB{
	opacity: 0;
	z-index: 9;
}
/* Arbre */
#arbre1{
	z-index: 13;
	opacity: 1;
}
#arbre1B{
	z-index: 13;
	opacity: 0;
}
#arbre2{
	z-index: 11;
	opacity: 1;
}
#arbre2B{
	z-index: 11;
	opacity: 0;
}
/* Ciel */
#ciel{
    z-index: 9;
	opacity: 1;
}
#cielB{
    z-index: 9;
	opacity: 0;
}
/* Nuage */
#nuage{
    z-index: 10;
	opacity: 1;
}
#nuageB{
    z-index: 10;
	opacity: 0;
}
/* Pont */
#pont{
    z-index: 12;
	opacity: 1;
}
#pontB{
    z-index: 12;
	opacity: 0;
}
/* Sable */
#sable{
    z-index: 11;
	opacity: 1;
}
#sableB{
    z-index: 11;
	opacity: 0;
}

/* BOUTONS ZOOM */
#btn-wrapper {
	position: fixed;
	right: 12px;
	bottom: 12px;
	z-index: 15;
}
button {
	display: block;
	width: 30px;
	height: 30px;
	margin-top: 10px;
	padding: 5px;
	border: 2px solid grey;
	border-radius: 15px;
	background: none;
	font-family: monospace;
	font-weight: 600;
	font-size: 20px;
	line-height: 15px;
	color: grey;
	cursor: pointer;
}
button:hover{
	color: rgb(198, 198, 198);
}