:root{
  --bg:#FFFFFF; --surface:#F6FAF8; --text:#0F172A; --muted:#60706A; --border:#E4EDE8;
  --accent:#0EA371; --accent-contrast:#06261B; --link:#0D9488; --link-hover:#0F766E;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0A0F0D; --surface:#101614; --text:#EAF1ED; --muted:#9CB2A9; --border:#21332C;
    --accent:#7CE9C2; --accent-contrast:#06261B; --link:#67E8F9; --link-hover:#22D3EE;
  }
}