/* =========================================================
   SAHAJTOOLS DESIGN TOKENS
   Statistics-instrument aesthetic: paper, ink, indigo, amber.
   ========================================================= */

:root {
  /* ---- Color: base ---- */
  --st-paper: #FAFAF7;
  --st-paper-raised: #FFFFFF;
  --st-ink: #161513;
  --st-ink-soft: #3A3833;
  --st-secondary: #8B8880;
  --st-border: #E8E6DF;
  --st-border-strong: #D3D0C7;

  /* ---- Color: brand / working ---- */
  --st-primary: #2B3A67;
  --st-primary-dark: #1E2A4D;
  --st-primary-tint: #EEF0F6;
  --st-accent: #C97D2C;
  --st-accent-tint: #FBF0E3;
  --st-valid: #7A9B76;
  --st-valid-tint: #EFF4EE;
  --st-error: #B3452F;
  --st-error-tint: #FBEEEB;

  /* ---- Typography ---- */
  --st-font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --st-font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --st-fs-xs: 0.8125rem;
  --st-fs-sm: 0.9375rem;
  --st-fs-base: 1rem;
  --st-fs-md: 1.125rem;
  --st-fs-lg: 1.375rem;
  --st-fs-xl: 1.75rem;
  --st-fs-2xl: 2.25rem;
  --st-fs-3xl: 3rem;

  --st-lh-tight: 1.15;
  --st-lh-snug: 1.35;
  --st-lh-normal: 1.6;

  /* ---- Spacing scale (8px base) ---- */
  --st-space-1: 0.25rem;
  --st-space-2: 0.5rem;
  --st-space-3: 0.75rem;
  --st-space-4: 1rem;
  --st-space-5: 1.5rem;
  --st-space-6: 2rem;
  --st-space-7: 3rem;
  --st-space-8: 4rem;
  --st-space-9: 6rem;

  /* ---- Radius / borders ---- */
  --st-radius-sm: 4px;
  --st-radius: 6px;
  --st-radius-lg: 10px;
  --st-border-width: 1px;

  /* ---- Layout ---- */
  --st-content-width: 1200px;
  --st-content-narrow: 760px;
  --st-header-height: 64px;

  /* ---- Motion ---- */
  --st-transition: 150ms ease;
  --st-transition-slow: 320ms cubic-bezier(0.22, 0.61, 0.36, 1);

  /* ---- Elevation (used sparingly — hairlines preferred) ---- */
  --st-shadow-sm: 0 1px 2px rgba(22, 21, 19, 0.06);
  --st-shadow-md: 0 4px 16px rgba(22, 21, 19, 0.08);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --st-transition: 0ms;
    --st-transition-slow: 0ms;
  }
}