/*ex-oc-3-5-14*/




.lien {
    position: relative;
}

.bouton {
    position: absolute;
    top: 0;
    right: 23%;
    bottom: 39%;
    left: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5em;
    color: white;
    background-color:  rgba(0, 0, 0, 0.7);     
    display: none;
}

.lien:hover .bouton {
    display: flex;        
}

@media screen and (max-width: 960px) {

    .b1{
        display: grid;
        grid-template-columns: 1fr;
        grid-template-rows: 65px 450px 550px;
        gap: 30px;
    }

    .bouton {
        position: absolute;
        display: flex;
        justify-content: center;
        align-items: center;
        top: 0;
        right: auto;
        bottom: 165px;
        left: 0;
        font-size: 1.5em;
        color: white;
        background-color:  rgba(0, 0, 0, 0.7);  
        display: none;
    }

    .lien:hover .bouton {
        display: flex;        
    }

    .img1 {
        width: 400px;
    }

    h2 {
        font-size: 28px;
    }

    .s5 {
        font-size: 17px;
        padding-left: 10px;
    }

    .b3 {
        grid-column: 1/2;
        grid-row: 3/4;
        margin: 20px 5px 5px 5px;
    }
    .b4{
        grid-column: 1/2;
        grid-row: 2/3;
    
    }
    
    footer {
        grid-template-columns: none;
        padding: 5px;
    
    }
    .foot2 {
        padding: 7px;
        text-align: center;
    }
    .s8 {
        width: 30px;
    }
}