/* Surface: the plain black radial background under every page (the look from before the brushed-steel
   texture, which Tibo asked to remove on 23 October 2026). The centre colour var(--bg-inner) is set by each
   page and switched by the flavour picker. The aurora canvas (assets/css/aurora.css, z-index -2) paints
   above this background and below the content, so body must own a stacking context. */
:root {
  --surface-base: #040507;
}
body {
  background: radial-gradient(circle at center, var(--bg-inner, #262c34) 0%, var(--bg-mid, #0c0e12) 50%, var(--bg-outer, #020304) 100%);
  background-attachment: fixed;
  isolation: isolate;
}