body {
    overflow: hidden;
}

header {
    position: absolute;
    top: 0;
    opacity: 0;
    animation-name: slidein;
    animation-duration: 3s;
    animation-delay: 1s;
    animation-fill-mode: forwards;
    animation-timing-function: ease-out;
}

#img-presentation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../img/home.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-blend-mode: multiply;
    background-size: cover;
    background-position: center;
    z-index: -100;
}

#presentation-article {
    position: absolute;
    top: 50%;
    left: 50%;
    padding: 5px;
    transform: translate(-50%, -50%);
    width: 100%;
    min-height: 100px;
    max-height: 140px;
    overflow: auto;
    background: rgba(0, 0, 0, 0.749);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#presentation-article em, #presentation-article strong {
    font-style: normal;
}

@keyframes slidein {
    from {
        transform: translateY(-16vh);
        opacity: 0;
    }
    to {
        transform: translateY(0vh);
        opacity: 0.8;
    }
}