/* ============================================================
   sellbase — Shadow / elevation tokens
   Linear/Vercel-style: subtle, low-contrast, single soft shadow
   plus a hairline border rather than heavy drop shadows.
   ============================================================ */
:root {
  --shadow-xs: 0 1px 2px rgba(16, 17, 22, 0.04);
  --shadow-sm: 0 1px 2px rgba(16, 17, 22, 0.05), 0 1px 1px rgba(16, 17, 22, 0.03);
  --shadow-md: 0 4px 10px rgba(16, 17, 22, 0.06), 0 1px 2px rgba(16, 17, 22, 0.04);
  --shadow-lg: 0 12px 24px rgba(16, 17, 22, 0.10), 0 2px 6px rgba(16, 17, 22, 0.05);
  --shadow-xl: 0 24px 48px rgba(16, 17, 22, 0.16), 0 4px 12px rgba(16, 17, 22, 0.06);

  --shadow-focus: var(--focus-ring);
  --shadow-overlay-backdrop: rgba(16, 17, 22, 0.45);
}

[data-theme="dark"] {
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.55);
  --shadow-xl: 0 28px 56px rgba(0, 0, 0, 0.6);
  --shadow-overlay-backdrop: rgba(0, 0, 0, 0.6);
}