html {
	font-size: 62.5%; /* 1rem = 10px (la formule est 10/16*100) la taille par défaut étant 16px */
}

body {
    color:#555;
    font-family: sans-serif;
    background-color: #eee;
    font-size: 1.6rem;
}

.container {
	max-width: 1100px; /* On donne une largeur au container */
	margin-left: auto; /* On centre son contenu */
	margin-right: auto;
}

main {
	padding: 2em;
}

h1 {
    font-size: 2.5em;
    color:#DD5735;
}
h2 {
    font-size: 2em;
    color: #333;
}
h3 {
    font-size: 1.5em
}

a {
    text-decoration:none;
    color:#DD5735;
}
a:hover {
	text-decoration: underline;
	color: #000;
}

* {
	box-sizing: border-box;
}

.header{
    padding: 1em;
	text-align: center;
	color: #999;
	background-color: #444;
}
.header h1 {
	margin: 0;
}
.footer {
	padding: 2em;
	text-align: center;
	color: #fff;
	background-color: #444;
}

.parent {
    border: 1px dashed #DD5735;
}

article {
	background-color: #fff;
	padding: 1em;
}

.card,
.cards > * {
	padding: 2em;
	background-color: #fff;
	border: 1px solid rgba(0,0,0,0.2);
}

.gutter > * {
	margin: 1em;
}

.code {
	padding: 0.5em;
	font-family: Monaco, monospace;
	font-size: 14px;
	color: #000;
	background-color: #ddd;
	border: 1px solid #bbb;
}