:root {
  --width: 120px;
  --n: 100;
}

.gallery {
	display: grid;
	grid-template-columns:  repeat(auto-fill, minmax(max(var(--width), 100%/var(--n)), 1fr));
	align-items: center;
	justify-items: center;
}

figcaption {
    font: italic smaller sans-serif;
    text-align: center;
}

.hide { display: none; }