This is the template project that's checked out and configured when you run the bando-up command from ljsthw-bandolier. This is where the code really lives.
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bandolier-template/admin/bando/demos/StackLayer.svelte.md

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Layers with different opacity are a staple of digital compositing systems but weirdly CSS is terrible at it. The stack/layer CSS in `static/global.csS` implements a simple method using `display: grid` to place elements into a single cell. The CSS grid system will then correctly layer each element in a stack. The elements also are set to `position:relative` so you can change their `z-index` to shuffle them around. Alternatively, you can simply set one of the children to `class="top"` and that one element will be on top.
If you don't set a `background-color` color then the layers will be transparent. You can also use `opacity` to hide or fade the layers in the stack.
The CSS that is making this work is below (but look in `static/global.css` to confirm it's still done this way.
```
.stacked {
display: grid;
grid-template-rows: 1fr;
grid-template-columns: 1fr;
grid-template-areas: "cover";
}
.stacked .layer {
width: 100%;
position: relative;
grid-area: cover;
}
.stacked .top {
z-index: 10;
}
```