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

html, body {
    height: 100%;
    background: url("img/v882-kul-67-a.jpg") no-repeat center center fixed;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.fullscreen {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
}

.fullscreen img {
    max-width: 100%;
    max-height: 100vh;
    width: auto;
    height: auto;
}