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

html, body {
    height: 100%;
    background: linear-gradient(135deg, #e8e8e8 0%, #f5f5f5 50%, #d8d8d8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

img {
    height: 120px;
}