h1{
	color: red;
	font-size: 50px;
	font-family: arial;
}

a{
	color: blue;
}

h2{
	color: orange;
	font-size: 30px;
}

.titre-bleu{
	color: blue;
	font-size: 40px;
}

#titre-h3{
	color: green;
}

ol li{
	color: turquoise;
}

header{
	background-color: grey;
	width: 1000px;
	margin: auto;
	padding:20px;
	display: flex;
	justify-content: space-between;
	align-items: center;
	flex-direction: column;
}

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