/* ============================================================
   Cerne — Typography tokens
   Single-family system: Helvetica/Arial for everything — the most
   universal, guaranteed-installed sans there is. Zero network
   dependency, zero fallback risk. No sans/serif pairing —
   hierarchy comes from size, spacing and ink weight.
   Numeric/tabular data (Cálculos) uses the mono stack.
   ============================================================ */

:root {
  /* Families */
  --font-display: Helvetica, Arial, sans-serif;
  --font-sans:    Helvetica, Arial, sans-serif;
  --font-serif:   var(--font-sans);
  --font-mono:    'SFMono-Regular', Menlo, Consolas, 'Courier New', monospace;

  /* Weights */
  --fw-regular: 400; /* @kind font */
  --fw-medium: 500; /* @kind font */
  --fw-semibold: 600; /* @kind font */
  --fw-bold: 700; /* @kind font */
  --fw-black: 700; /* @kind font */

  /* Type scale (rem @ 16px root) — restrained, enterprise steps */
  --text-xs:   0.8125rem; /* 13 — uppercase labels, fine print */
  --text-sm:   0.9375rem; /* 15 — secondary / dense UI */
  --text-base: 1rem;      /* 16 — DEFAULT body */
  --text-lg:   1.125rem;  /* 18 — lead paragraph */
  --text-xl:   1.375rem;  /* 22 — card titles */
  --text-2xl:  1.75rem;   /* 28 — section heads */
  --text-3xl:  2.375rem;  /* 38 — page titles */
  --text-4xl:  3.125rem;  /* 50 — screen heroes */
  --text-5xl:  4.125rem;  /* 66 — marketing display */

  /* Line heights */
  --leading-tight:  1.08;  /* big display headings */
  --leading-snug:   1.2;   /* headings */
  --leading-normal: 1.5;   /* UI body */
  --leading-relaxed: 1.6;  /* long-form body */

  /* Letter spacing */
  --tracking-display: -0.01em; /* hero headings */
  --tracking-tight: -0.006em;
  --tracking-normal: 0;
  --tracking-label: 0.14em;  /* uppercase section labels */
}