Html {font-size: 100%;}

body {
	width: 90%;
	font-size: 2.5vw;
	background: url("fond.gif");
	font: Work Sans;
	margin: 2;
	padding: 0;
}

.titre{
	font-size: 4.2vw;
	font-weight: bold;
	height: 2vw;
	margin-top:0
}

.logo {
	width: 4vw;
	height: auto;
}

.bouton {
	width: 3vw;
	height: auto;
}

img {
    max-width: 80vw;
    height: auto;
}

button, input, select, textarea {
  font-family : inherit;
  font-size   : 100%;
}