body {
    background-color: rgb(27,13,158);
}

h1 { 
    font-size: 3em;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgb(245,211,2);
    font-weight: bold;
}

span, #merci {
    font-size: 1.7em;
    color: rgb(245,211,2);
    font-weight: bold;
}
video {
    width: 40em;
    height: 25em;
}
.header{
    text-align: center;
    margin: 1em 0;
}
.contain {
    width: 100%;
    display: flex;
    justify-content: center;
}
#diapo {
    width: 62em;
    height: 25em;
    padding: 1em 0;
    background-image: url("images/4.jpg");
    display: flex;
    align-items: center;
    justify-content: center;

}
#diapo2 {
    width: 62em;
    height: 25em;
    padding: 1em 0;
    background-image: url("images/2.jpg");
    display: flex;
    align-items: center;
    justify-content: center;
}

#merci {
    text-align: center;
    font-style: italic;
}
/* Responsive */

@media screen and (max-width:800px) {
    h1 {
        font-size: 2.7em!important;
    }
    span, #merci {
        font-size:  1.4em;
    }
    video {
        width: 30em;
        height: 18.8em;
    }
    #diapo {    
        background-image: url("images/4b.jpg");       
        width: 40.5em;
        height: 25em;
        }
    #diapo2 {
        background-image: url("images/2b.jpg");   
        width: 40.5em;
        height: 23em;
    }
}
@media screen and (max-width: 600px) {
    h1 {
        font-size: 2em!important;
    }
    span, #merci {
        font-size: 1.1em;
    }
    video {
        padding: 1em!important;
        width: 27em;
        height: 14em;
    }
    #diapo {    
        background-image: url("images/4b.jpg");        
        width: 34em;
        height: 15.5em;
        }
    #diapo2 {
        background-image: url('images/2b.jpg');
        width: 21.8em;
        height: 16em;
    }

}  
@media screen and (max-width: 500px) {
    h1 {
        font-size: 1em!important;
    }
    span, #merci {
        font-size: 1.1em;
    }
    video {
        padding: 1em!important;
        width: 22em;
        height: 11em;
    }
    #diapo {    
        background-image: url("images/4a.jpg");        
        width: 27em;
        height: 14em;
        }
    #diapo2 {
        background-image: url('images/2a.jpg');
        width: 21.8em;
        height: 14.5em;
    }

}