:root{
    --clair:#FFF;
    --sombre:#000;
    --froid:#00456b;
    --chaud:#f56425;
}
html, body{
    padding:0;
    margin:0;
    font-family: 'Raleway', sans-serif;
    font-size:400;
    font-size:16px;
}
h1{
    font-size: 36px;
    font-weight: 100;
}
h2{
    font-size: 28px;
    font-size:400;
}
h3{
    font-size: 24px;
    font-weight: 100;
}
h4{
    font-size: 21px;
    font-weight: 400;
}
a{
    text-decoration: none;
    transition: all .3s ease;
}
* {
    box-sizing: border-box;
}
main{
    width:100vw;
    height:100vh;
    display:flex;
    flex-flow:column nowrap;
}
main > header{
    background-color: var(--clair);
    display:flex;
    flex-flow: column nowrap;
    padding:0 15px;
    position:absolute;
    width:400px;
    top:150px;
    left:calc(50% - 225px);
    text-align: center;
}
main > header img{
    width:100%;
}
main > header h1{
    margin-top : 10px;
}
main > section{
    width:100vw;
    height:100vh;
    display:flex;
    flex-flow:row nowrap;
}
main > section > article{
    width:50vw;
    height:100vh;
    display: flex;
    background-repeat: no-repeat;
    background-position-y: 50%;
}
main > section > article:nth-child(1){
    background-image:url('../images/blue-marble-patterned-wallpaper-background.jpg');
    background-position-x: 100%;
    border-right: 2px solid;
}
main > section > article:nth-child(2){
    background-image: url('../images/fire-cloud-space-background.jpg');
    background-position-x: 0%;
    border-right: 2px solid;
}
main article > div{
    margin:auto;
    width:40%;
}
main article > div > *{
    margin:0;
    padding:10px 15px;
}
main article h2{
    border:1px dotted var(--clair);
    color:var(--clair);
    text-align: center;
}
main article ul{
    margin-top: 10px;
    background-color: var(--clair);
}
main article ul > li{
    list-style: none;
    background-color: var(--clair);
}
main > footer{
    position:absolute;
    width:40vw;
    bottom:10px;
    left:30vw;
    background-color: var(--clair);
    padding:15px;
    display:flex;
    align-items: center;
    justify-content: center;
    font-size:12px;
    text-transform: uppercase;
}

main article div > *{
    transition: padding .4s ease;
}
main article:hover div > *{
    padding:25px;
}
main > footer > *{
    margin:0 10px;
}
main > footer > a:hover{
    transform: scale(1.1);
    background-color: var(--chaud);
    color: var(--clair);
    padding:10px 15px;
}
/* Classes personnalisées */
.pop{
    position:absolute;
    display:none;
}
.show{
    display: flex;
}
/* Mobiles */
@media screen and (max-width:980px){
    main{
        flex-direction:column;
    }
}