body {
	margin: 0;
	text-align: center left;
	font-family: helvetica, arial;
	color: black;
    width: 100%;
    height: 100vh; 
}

header {
	height: 500px;
	background-color: #3dd0ac;
	background-image: url(tree.png);
	background-position: 20px 10px;
	background-repeat: no-repeat;
	color: black;
	background-size: 25%;
	box-shadow: 0 0 20px #000;
	text-align: center;

}

nav {
    display: flex;
    justify-content: center;
    align-items: center;
}

nav ul {
    display: flex;
    list-style: none;
    padding: 10px;
}

nav ul li {
    margin: 0 10px;
}

.titre {
	margin-top: 350px;
	font-size: 45px;
	font-weight: bold;
    text-transform: uppercase;
}

section {
	padding: 10px;
	width: 760px;
	margin: 0 auto;
    text-align: center;
}

section h1 {
	font-size: 45px;
	letter-spacing: 4px;
	text-align: center;
    
}

section p {
    margin-inline: 10px;
}

footer {
	height: 40px;
	background-color: #3dd0ac;
	color: black;
	box-shadow: 0 0 20px #000;
	text-align: center;
}

footer p {
	padding: 10px;
}

a {
	font-weight: bold;
	text-decoration: none;
	text-transform: uppercase;
	color: black;
    letter-spacing: 1px;
    
}

nav ul li a:visited {
	color: black;
}

nav ul li a:hover {
	color: black;
	text-decoration: underline;
}

nav ul li a.current {
	color: #3dd0ac;
	background-color: black;	
	border-radius: 4px;
	padding: 5px;
}

.date{
	font-weight: bold;
}

@media (prefers-color-scheme: dark) {
	body {
	  background-color: black;
	  color: white;
	}
	header {
		background-color: #1A5647;
		background-image: url(treeDARK.png);
		color: white;
		box-shadow: 0 0 20px #ffffff;
	}
	footer{
	background-color: #1A5647;
	color: white;
	box-shadow: 0 0 20px #ffffff;
	text-align: center;
	}
	a {
		color: white;
	}
	nav ul li a:visited {
		color: white;
	}
		
	nav ul li a:hover {
		color: white;
		text-decoration: underline;
	}
		
	nav ul li a.current {
		color: #1A5647;
		background-color: white;
	}
  }