body {
    background-size: cover;
    background-repeat: no-repeat;
    font-size: 16px;
    /* = valeur de em */
    /*background-color: darkgrey;*/
}

a {
    text-decoration: none;
    font-size: 1em;
    color: azure;
}

/*
#BoiteBoutAccueil {
    width: 100%;
    margin-top: 60vh;
    height: 3em;
    text-align: center;
}
*/
#TexteIndex {
    width: 80%;
    margin-left: 10%;
    margin-top: 15vh;
    text-align: left;
    font-size: 1.5em;
    /*background-color: rgba(100, 100, 100, 0.7);*/
    color: azure;
    text-shadow: 2px 2px #101010;
    /*    -webkit-text-stroke: 2px;*/
    /*-webkit-text-stroke-color: #FFF;*/
    /*text-shadow: 2px 0 0 #d60, 2px 2px 0 #d60, 0 2px 0 #d60, -2px 2px 0 #d60, -2px 0 0 #d60, -2px -2px 0 #d60, 0 -2px 0 #d60, 2px -2px 0 #d60;*/

}

#TexteIndex2 {
    width: 80%;
    margin-left: 10%;
    margin-top: 15vh;
    text-align: left;
    font-size: 1.5em;
    color: azure;
}

.StyleBoutonAccueil {
    margin-left: 37.5%;
    width: 25%;
    margin-top: 2em;
    font-size: 2.5em;
    background-color: darkgrey;
    text-align: center;
    padding: 0.5em;
    border: 0.1em solid;
    border-color: azure;
    text-transform: uppercase;
    border-radius: 10em;
}

/* SmartphoneVertical max 480 px*/
@media screen and (max-width :29.990em) and (orientation : portrait) {


    body {
        background-image: url("IMAGES/TRIO/TRIO-IV-488-1000-N4.JPG");
    }

    #TexteIndex {
        margin-top: 1.5em;
    }

    #TexteIndex2 {
        display: none;
    }

    .StyleBoutonAccueil {
        margin-left: 20%;
        width: 60%;
        margin-top: 5em;
        font-size: 1.3em;
    }

}

/* Smartphone horizontal  max 820px */
@media screen and (max-width :51.259em) and (orientation : landscape) {


    body {
        background-image: url("IMAGES/TRIO/TRIO-IH-850-550-N4.JPG");
    }

    #TexteIndex {
        display: none;
    }

    #TexteIndex2 {
        font-weight: bold;
    }

    #BoutonAccueil {
        display: none;
    }

}

/* TabletVertical  min 481px*/
@media screen and (min-width : 29.991em) and (orientation : portrait) {


    body {
        background-image: url("IMAGES/TRIO/TRIO-TV-770-1025-N4.JPG")
    }

    .StyleBoutonAccueil {
        margin-left: 25%;
        width: 50%;
        font-size: 1.3em;
        border: 0.1em solid;
    }

    #TexteIndex {
        width: 60%;
        margin-left: 20%;
        margin-top: 5vh;
        font-size: 1.2em;
    }

    #TexteIndex2 {
        display: none;
    }
}

/* Tablet horizontal et small pc - min 821px max 1280px */
@media screen and (min-width : 51.260em) and (max-width :80em) and (orientation : landscape) {


    body {
        background-image: url("IMAGES/TRIO/TRIO-TH-1280-850-N4.JPG");
    }

    #TexteIndex {
        width: 50%;
        margin-left: 25vw;
        margin-top: 10vh;
        font-size: 1em;
    }

    .StyleBoutonAccueil {
        margin-left: 30%;
        width: 40%;
        margin-top: 2em;
        font-size: 1.4em;
    }

    #TexteIndex2 {
        display: none;
    }
}

/* Grand Ecran horizontal- 1280px */
@media screen and (min-width : 80.001em) and (orientation : landscape) {


    body {
        background-image: url("IMAGES/TRIO/TRIO-BIG-1900-1342-N4.JPG");
    }

    #TexteIndex {
        margin-top: 20vh;
        font-size: 1.3em;
    }

    .StyleBoutonAccueil {
        margin-left: 40%;
        width: 20%;
        margin-top: 5em;
        font-size: 1.3em;
    }

    #TexteIndex2 {
        display: none;
    }

}

/* Si modif css particulier à un type d ecran le redefinir dans le #media ad hoc */
/* le media query peur également se faire dans le general 
*/