body{
    font-family: sans-serif;
    color: #555;
    background-color: #eee;
    line-height : 1.5em;
}

header, footer {
    line-height: 2;
	text-align: center;
	color: #555;
	background-color: #333;
	border: 1px solid rgba(225,0,0,0.7);
}
*{
    box-sizing : border-box;
}
h1 {
    font-size: 2.5em;
    color: #DD5735;
}
h2{
    
    font-size: 2em;
    color: #333;
}
h3 {
    font-size: 1.5em;
}

.colonnes{
    columns : 3;
    column-rule : 1px solid #333;
    justify-content : center;
    margin-bottom: 2em;
    padding: 0;
    text-align: justify;
    column-gap: 2em;
}
p{
    margin : 3em;
}
ul {
    
    margin : 1em 1em 0px 0px;
    padding : 40px;
}

.colonne1 li{
    margin-bottom : 2em;
    list-style: none;
}
.colonne1{
    padding-left: 0;
    column-count: 2;
    list-style : none;
    margin-bottom : 1em;
    
}
img{
    width : 200px;
    height : 200px;
    background-color: #fff;
    color: #aaa;
}