*, *:before, *:after{
    box-sizing: border-box;
}
html, body{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
}
.scene{
    position: fixed;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}
.bg{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
.bg img{
    filter:grayscale(0.95) invert(0.3);
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.logo{
    position: relative;
    z-index: 5;

}
.logo svg{
    fill: #FFC107;
    width: 30vh;
    height: 30vh;
}
.social-medias{
    position: absolute;
    bottom: 5em;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
}
.social-medias ul{
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    column-gap: 1em;
}
.social-medias ul li{
    display: inline-block;
}
.social-medias ul li a{
    display: inline-flex;
    color: #fff;
    align-items: center;
    column-gap: 8px;
    text-decoration: none;
}
.social-medias ul li .icon-placeholder{
    position: relative;
    width: 30px;
    height: 30px;
    display: none;
}
.social-medias ul li .icon-placeholder svg{
    width: 30px;
    height: 30px;
    fill: yellow;
    display: none;
}

@media (max-width: 767px){
    .social-medias ul{
        display: flex;
        flex-direction: column;
        row-gap: 0.5em;
        text-align: center;
        align-items: center;
    }
    .scene{
        flex-direction: column;

    }
    .social-medias{
        position: static;
    }

}