body {
    margin: 0; height: 100vh; font-size: 14px; background-color: #1a1a1a; display: flex; align-items: center; justify-content: center; will-change: background-color;
}

* { box-sizing: border-box; }

img {
    height: 7em; max-width: 100%; object-fit: contain; will-change: transform, opacity;
}

@media screen and (max-width: 768px) {
    img { height: 5em; }
}