/* Default-theme accessibility layer: make surfaces and controls easy to distinguish. */
:root:not([data-theme-preset]),
:root[data-theme-preset="default"] {
  color-scheme: light;
  --background: #e2e8f0;
  --foreground: #0f172a;
  --card: #ffffff;
  --card-foreground: #0f172a;
  --popover: #ffffff;
  --popover-foreground: #0f172a;
  --primary: #075985;
  --primary-foreground: #ffffff;
  --secondary: #dbeafe;
  --secondary-foreground: #0f172a;
  --muted: #dbe4ef;
  --muted-foreground: #334155;
  --accent: #dbeafe;
  --accent-foreground: #0f172a;
  --border: #475569;
  --input: #475569;
  --ring: #0369a1;
  --sidebar: #f8fafc;
  --sidebar-foreground: #0f172a;
  --sidebar-primary: #075985;
  --sidebar-primary-foreground: #ffffff;
  --sidebar-accent: #dbeafe;
  --sidebar-accent-foreground: #0f172a;
  --sidebar-border: #475569;
  --sidebar-ring: #0369a1;
  --skeleton-base: #cbd5e1;
  --skeleton-highlight: #e2e8f0;
  --table-row: #ffffff;
}

:root.dark:not([data-theme-preset]),
:root.dark[data-theme-preset="default"] {
  color-scheme: dark;
  --background: #0b1220;
  --foreground: #f8fafc;
  --card: #172033;
  --card-foreground: #f8fafc;
  --popover: #1e293b;
  --popover-foreground: #f8fafc;
  --primary: #38bdf8;
  --primary-foreground: #082f49;
  --secondary: #253247;
  --secondary-foreground: #f8fafc;
  --muted: #253247;
  --muted-foreground: #cbd5e1;
  --accent: #1e3a5f;
  --accent-foreground: #f8fafc;
  --border: #94a3b8;
  --input: #94a3b8;
  --ring: #38bdf8;
  --sidebar: #101827;
  --sidebar-foreground: #f8fafc;
  --sidebar-primary: #38bdf8;
  --sidebar-primary-foreground: #082f49;
  --sidebar-accent: #1e3a5f;
  --sidebar-accent-foreground: #f8fafc;
  --sidebar-border: #94a3b8;
  --sidebar-ring: #38bdf8;
  --skeleton-base: #253247;
  --skeleton-highlight: #334155;
  --table-row: #172033;
}