body {
    background: linear-gradient(180deg,rgba(0, 0, 0, 1) 73%, rgba(158, 158, 158, 1) 100%);
    display: flex;
    flex-direction: column;
    height: 100vh;
}

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

.header-menu span {
    background: #fff;
}

@media(max-width: 900px) {
    .wrapper .img {
        width: 80%;
    }
}