* {
    border:1px solid black;
}

/*** Mise en forme du bloc 1 ***/
body{
    font-family: sans-serif;
    font-size: 18px;
}

h1{
    color:#2745ac;
    font-size: 2.5rem;
}
button{
    background-color: #0071e3;
    color:white;
    padding:10px 20px;
    font-size: 1.2rem;
    border-radius: 2rem;
}
button:hover{
    background-color: white;
    color:  #0071e3
}
a {
    color:#0071e3;
    text-decoration: none;
    display: block;
    margin: 20px 0px;
}

/*** Positionnement des blocs ***/
section {
    text-align: center;
}
.bloc1 , .bloc2 {
    width:48%;
    display: inline-block;
    vertical-align: middle;
}
.bloc2 img{
    max-width: 100%;
}

@media screen and (max-width: 1000px) {
    .bloc1  {
        width:100%;
    }  
}
@media screen and (max-width: 500px) {
    .bloc2  {
        width:80%;
    }  
}
/*** Mise en forme du bloc 3 ***/
footer h1{
    color:black;
    font-size: 3rem;
    text-align: center;
}

.bloc3 div{
    margin:20px;
    display: inline-block;
    text-align: center;
}
.bloc3{
    display: inline-block;
}
footer{
    text-align: right;
}
.bloc3 img {
    max-width: 100%;
}