/* ============================================================
   ATREE — Typography tokens
   Primary:   Cooper Hewitt  (headlines, body, UI)
   Secondary: Georgia        (donor mailers, presentations,
                              editorial pull-quotes — adds warmth
                              & scientific-publication credibility)
   ============================================================ */

:root {
  /* Families */
  --font-sans:  "Cooper Hewitt", "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-mono:  ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Weights (per brand book: Book / Bold / Heavy) */
  --fw-thin:   100; /* @kind font */
  --fw-light:  300; /* @kind font */
  --fw-book:   400; /* @kind font */
  --fw-medium: 500; /* @kind font */
  --fw-semibold: 600; /* @kind font */
  --fw-bold:   700; /* @kind font */
  --fw-heavy:  900; /* @kind font */

  /* Type scale (16px base, ~1.25 modular) */
  --text-xs:   0.75rem;   /* 12 */
  --text-sm:   0.875rem;  /* 14 */
  --text-base: 1rem;      /* 16 */
  --text-md:   1.125rem;  /* 18 */
  --text-lg:   1.25rem;   /* 20 */
  --text-xl:   1.5rem;    /* 24 */
  --text-2xl:  1.875rem;  /* 30 */
  --text-3xl:  2.375rem;  /* 38 */
  --text-4xl:  3rem;      /* 48 */
  --text-5xl:  3.75rem;   /* 60 */
  --text-6xl:  4.75rem;   /* 76 */

  /* Line-heights */
  --leading-tight:   1.08;
  --leading-snug:    1.2;
  --leading-normal:  1.5;
  --leading-relaxed: 1.65;

  /* Letter-spacing */
  --tracking-tight:  -0.02em;
  --tracking-normal: 0;
  --tracking-wide:   0.04em;
  --tracking-caps:   0.10em;  /* the brand sets headers in wide caps */

  /* ---- Semantic role tokens ---- */
  --font-display:  var(--font-sans);   /* use with --fw-heavy */
  --font-heading:  var(--font-sans);   /* use with --fw-bold  */
  --font-body:     var(--font-sans);
  --font-editorial:var(--font-serif);  /* quotes, mailers, reports */
  --font-eyebrow:  var(--font-sans);   /* wide caps label */
}