body{
    font-family: 'century gothic', sans-serif;
    font-size: 13px;
    margin: 0px;
    padding: 0px;
    background-color: grey;
}
h1{
    font-size: 40px;
    font-weight: normal;
    text-align: center;
}
header{
    height: 100px;
    background-color: rgb(22, 22, 22);
    color: rgba(255, 0, 0, 0.75);
    border-top: 2px solid red;
}
footer{
    height: 80px;
    padding-top: 30px;
    text-align: center;
    background-color: rgb(46, 46, 46);
    color: black;
    border-bottom: 2px solid black;
}

nav{
    width: 100%;
    border: 2px solid red;
    background-color: black;
}

nav ul{
    margin: 0;
    padding: 0;
}

nav li{
    background-color: black;
    list-style-type: none;
    float: left;
}

nav a{
    display: inline-block;
    text-decoration: none;
    padding: 20px 30px;
    color: #ffffff;
    text-transform: uppercase;
    font-size: 15px;
}

.table{
    display: table;
    margin: 0 auto;
}

.produit:hover{
    border-top: 5px solid red;
    background-color: rgba(255, 0, 0, 0.15);
}

.exo:hover{
    border-top: 5px solid red;
    background-color: rgba(255, 0, 0, 0.15);
}

.pk:hover{
    border-top: 5px solid red;
    background-color: rgba(255, 0, 0, 0.15);
}
h2{
    background-color: black;
    color: white;
    text-align: center;
}

@media screen and (max-width: 780px){
    header{
        height: 50px;
    }
    h1{
        font-size: 28px;
        margin: 20px 0px 0px 0px;
    }
    nav li a{
        padding: 10px;
        font-size: 10px;
    }
    nav li{
        padding: 5px 10px 10px 10px;
    }
}

.qsn{
    color: black;
    border-right: 5px solid rgb(0, 0, 0);
    border-left: 5px solid black;
}

.contact{
    text-align: center;
    color: rgb(0, 0, 0);
}

.logo{
    text-align: center;
    margin-top: 20px;
    margin-bottom: 20px;
}