/* Dark is the default, in the CSS rather than in the boot script, so a visitor with JavaScript off gets the intended page rather than a light fallback. Light is opt-in via [data-theme="light"] on , set by the nav toggle and persisted in localStorage. */ /* Three surface steps, darkest first: --ground is the page, --panel is a raised card, --bg is the cleanest fill and marks the active/selected thing sitting on a panel. */ :root { /* `color-scheme` is not decoration: it is what makes the native