* {
    box-sizing: border-box;
}

html, body {
    top: 0;
    left: 0;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
}

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

img {
    width: 50%;
    max-width: 150px;
    height: 50%;
    max-height: 150px;
    display: block;
}