body{
    max-width: 100%;
    background-image: url("fond.jpg");
    background-repeat: no-repeat;
    background-size: cover;
}

header{
    display: flex;
    justify-content: flex-end;
    align-content: center;
    margin: 0;
}
/************** animation du h1******************/
h1{
    font-size: 9vw;
    margin: 40px 0;
    color: #1E2D30;
}
h1>span:nth-of-type(1){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in forwards;
}
h1>span:nth-of-type(2){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 0.2s forwards;
}
h1>span:nth-of-type(3){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 0.3s forwards;
}
h1>span:nth-of-type(4){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 0.4s forwards;
}
h1>span:nth-of-type(5){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 0.5s forwards;
}
h1>span:nth-of-type(6){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 0.6s forwards;
}
h1>span:nth-of-type(7){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 0.7s forwards;
}
h1>span:nth-of-type(8){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 0.8s forwards;
}
h1>span:nth-of-type(9){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 0.9s forwards;
}
h1>span:nth-of-type(10){
    opacity: 0;
    animation: opacityTitre 0.7s normal 1 ease-in 1s forwards;
}
@keyframes opacityTitre {
    0%{
        opacity: 0;
    }
    100%{
        opacity: 1;
    }
}

p{
    font-size: 5vw;
}
/************* Menu navigation sur page d'ordinateur *****************/

header>nav>ul{
    display: block;
    background-color:#1E2D30;
}
header>nav>ul>li{
    display: inline-block;
    position: relative;
}
header>nav>ul>li>a{
    color: rgb(231, 240, 255);
    display: block;
    text-decoration: none;
    overflow: visible;
    font-size: 24px;
    padding: 15px 10px;
}
li::after{
    content:"";
    width: 2px;
    background-color: rgb(231, 240, 255);
    height: 70%;
    top:15%;
    position: absolute;
    display: block;
}

li:first-of-type:after{
    display: none;
}
.troisD{
    perspective: 200px;
    transition: all 0.7s linear;
    position: relative;
    cursor: pointer;
}
.troisD:hover .boite, .troisD:focus .boite{
    transform: translateZ(-25px) rotateX(90deg);
}
.boite{
    transition: all 0.3s ease-out;
    transform: translateZ(-25px);
    transform-style: preserve-3d;
    pointer-events: none;
    position: absolute;
    top:0;
    left:0;
    display: block;
    width: 100%;
    height: 100%;
}
.front{
    transform:rotateX(0deg) translateZ(25px);
}
.back{
    transform: rotateX(-90deg) translateZ(25px);
    color: rgb(231, 240, 255);
}
.front, .back{
    display: block;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: #1E2D30;
    padding: 15px 10px;
    color: rgb(231, 240, 255);
    pointer-events: none;
    box-sizing: border-box;
}

/********************* Menu navigation sur page téléphone avec menu burger***********************/
@media screen and (max-width:1250px){
    body{
        width: 100%;
        background-size:1250px 800px;
    }
}

@media screen and (max-width:800px){




header{
    background-color: #1E2D30;
}

span, .front ,.back, .boite {
    display: none;
}
header>nav{
    position: relative;
}
header>nav>ul>li>a{
    text-align: center;
    text-decoration:none ;
    padding: 10px;
    color: rgb(231, 240, 255);
} 
header>nav>ul>li{
    display: flex;
    text-align: center;
    align-items: center;
    list-style:none;
    flex-direction: column;
    margin: 15px;
}
li::after{
    display: none;
}
header>nav>ul.menu{
    position: absolute;
    padding: 10px;
    opacity: 0;
    right: -200px;
    background-color:#1E2D30 ;
    transition: all 1s ease;
}

header>nav>ul.menuOn{
    opacity: 1;
    right:0;
}
.hamburger {
    padding: 15px 15px;
    display: inline-block;
    cursor: pointer;
    transition-property: opacity, filter;
    transition-duration: 0.15s;
    transition-timing-function: linear;
    font: inherit;
    color: inherit;
    text-transform: none;
    background-color: transparent;
    border: 0;
    margin: 0;
    overflow: visible; 
}
.hamburger:hover {
    opacity: 0.7; 
}
.hamburger.is-active:hover {
    opacity: 0.7; 
}
.hamburger.is-active .hamburger-inner, .hamburger.is-active .hamburger-inner::before, .hamburger.is-active .hamburger-inner::after {
    background-color: rgb(231, 240, 255); 
}

.hamburger-box {
    width: 40px;
    height: 24px;
    display: inline-block;
    position: relative; 
}

.hamburger-inner {
    display: block;
    top: 50%;
    margin-top: -2px; 
}
.hamburger-inner, .hamburger-inner::before, .hamburger-inner::after {
    width: 40px;
    height: 4px;
    background-color: rgb(231, 240, 255);
    border-radius: 4px;
    position: absolute;
    transition-property: transform;
    transition-duration: 0.15s;
    transition-timing-function: ease; 
}
.hamburger-inner::before, .hamburger-inner::after {
    content: "";
    display: block; 
}
.hamburger-inner::before {
    top: -10px; 
}
.hamburger-inner::after {
    bottom: -10px; 
}

/*
     * Stand
     */
.hamburger--stand .hamburger-inner {
    transition: transform 0.075s 0.15s cubic-bezier(0.55, 0.055, 0.675, 0.19), background-color 0s 0.075s linear; 
}
.hamburger--stand .hamburger-inner::before {
    transition: top 0.075s 0.075s ease-in, transform 0.075s 0s cubic-bezier(0.55, 0.055, 0.675, 0.19); 
}
.hamburger--stand .hamburger-inner::after {
    transition: bottom 0.075s 0.075s ease-in, transform 0.075s 0s cubic-bezier(0.55, 0.055, 0.675, 0.19); 
}

.hamburger--stand.is-active .hamburger-inner {
    transform: rotate(90deg);
    background-color: transparent !important;
    transition: transform 0.075s 0s cubic-bezier(0.215, 0.61, 0.355, 1), background-color 0s 0.15s linear; 
}
    .hamburger--stand.is-active .hamburger-inner::before {
    top: 0;
    transform: rotate(-45deg);
    transition: top 0.075s 0.1s ease-out, transform 0.075s 0.15s cubic-bezier(0.215, 0.61, 0.355, 1); 
}
.hamburger--stand.is-active .hamburger-inner::after {
    bottom: 0;
    transform: rotate(45deg);
    transition: bottom 0.075s 0.1s ease-out, transform 0.075s 0.15s cubic-bezier(0.215, 0.61, 0.355, 1);
}
    }
/****************************************/