body{
    background-image: linear-gradient(to bottom left,#000,#008);
    background-repeat: no-repeat;
    background-color: black;
    width: 1200px;
    margin-left: auto;
    margin-right: auto;
    font-family: Calibri, 'Trebuchet MS', sans-serif;
    
    --hauteur-page:850px;
    --couleur-txt:#FFFFFF;
}

section{
    margin-bottom:20px;
}

#page1{
    background-image: url('data/background/page1.jpg');
    background-size:cover;
    height: var(--hauteur-page);
}

#logo{
    display: grid;
    grid-template-columns: 100px 1fr;
    grid-template-rows: 60px 1fr;
    padding:30px;
}
#logo h1,h2{
    color:var(--couleur-txt);
    text-align: left;
    margin-top:1px;
    margin-bottom:1px;
    margin-left:20px;
}
#logo h1{
    font-size: 50px;
}
#logo h2{
    font-size: 15px;
}
#logo img{
    grid-row: 1/3;
    max-height:96px;
}

#page2{
    /*background-image: linear-gradient(to bottom right, black, aqua);*/
    color: var(--couleur-txt);
    height: var(--hauteur-page);
    background-image: url(data/background/page2.jpg);
    background-size: cover;
    position: relative;
}
#page2 .grille{
    width: 45%;
    height: calc(100% - 60px);
    position:absolute;
    top: 0;
    right: 30px;
    gap:30px;
    margin-top:30px;
}

#page3{
    height: var(--hauteur-page);
    background-color: black;
    background-image: url(data/background/page3.jpg);
    background-size: cover;
    color: var(--couleur-txt);
    position:relative;
}
#grille-de-logo{
    width: 50%;
    height: var(--hauteur-page);/*hauteur page3 - padding de la grille*/
    display: grid;
    place-items: center;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 2fr 2fr 1fr 1fr 4fr 4fr;
    text-align: center;
    position: absolute;
    top:0;
    right:0;
    background-color: white;
    gap:10px;
}
.box-logo img{
    max-height: 100px;
    max-width: 300px;
    vertical-align: middle;
}
#logo-cisco{
    grid-column: 1/3;
}

#page4{
    color: var(--couleur-txt);
    background-color:#005370;
    background-image: url(data/background/page4.jpg);
    background-size: cover;
    position: relative;
    height:var(--hauteur-page);
}

#liens{
    background-color: rgba(0,0,0,0.7);
    position: absolute;
    bottom: 30px;
    left: 30px;
    padding: 10px;
    padding-left: 30px;
    padding-right: 30px;
}
#liens img{
    max-height: 32px;
    vertical-align: middle;
    padding-right:10px;
}
#liens a{
    text-decoration: none;
    color: var(--couleur-txt);
    font-size: x-large;
}
#liens a:hover{
    text-decoration: underline;
}

footer{
    display:none;
    text-align: right;
    color:darkgray;
    background: none;
}

.grille{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 10px;
    /*background-image: url(data/background/page2.jpg);
    background-size: contain;*/
}
.box{
    /*height: 150px;*/
    color: var(--couleur-txt);
    text-align: left;
    background-color:rgba(0,0,0,0.7);
    border-bottom: white solid;
    padding:10px;
}
.box h3{
    color:royalblue;
    margin-top:1px;
    margin-bottom:1px;
    font-size: medium;
    font-weight:normal;
    height:70px;

}
.box img{
    max-height: 32px;
    max-width: 32px;
}
.box p{
    font-weight: thin;
}

.txt-droite{
    color: var(--couleur-txt);
    text-align: left;
    padding-left: 50%;
    padding-right: 120px;
    margin-top:200px;
}
.txt-droite h3,h4{
    margin:1px;
    font-weight: 300px;
}
.txt-droite h3{font-size: 35px}
.txt-droite h4{font-size: 30px}
.txt-droite p{font-size:20px}

.txt-gauche{
    background-color:rgba(0,0,0,0.7);
    width:45%;
    position:relative;
    top:30px;
    left:30px;
    padding:10px;
}