body {
    margin: 0px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
body > * {
    width: 100%;
    box-sizing: border-box;
}
.banner {
    width: 100%;
    height: 100vh;
    background-image: url("../images/home.jpeg");
    background-repeat: no-repeat;
    background-size: 100% auto;
    background-position: center center;
}
.banner.home {
    background-size: cover;
}
img {
    width: 100%;
    height: auto;
    position: relative;
}