*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    background: #ffffff;
    display: flex;
    justify-content: center;
}

.presentation {
    width: 100%;
    max-width: 1440px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}