/* ============================================================
   TYPOGRAPHY — Biblioteca Ernesto Ragionieri
   Titillium Web is the official typeface of the Italian Public
   Administration (Designers Italia). Lora provides a humanist
   serif for long-form reading (book/catalog context); Roboto
   Mono for codes, shelf marks and metadata.
   Fonts loaded via Google Fonts in fonts.css.
   ============================================================ */
:root {
  --font-sans: "Titillium Web", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Lora", Georgia, "Times New Roman", serif;
  --font-mono: "Roboto Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Weights */
  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 600;
  --weight-bold: 700;

  /* Type scale — 1.250 major-third, base 18px (PA readability) */
  --text-xs:   0.75rem;   /* 12px — captions, meta */
  --text-sm:   0.875rem;  /* 14px — labels */
  --text-base: 1rem;      /* 16px — UI */
  --text-md:   1.125rem;  /* 18px — body reading */
  --text-lg:   1.375rem;  /* 22px — lead */
  --text-xl:   1.75rem;   /* 28px — h3 */
  --text-2xl:  2.25rem;   /* 36px — h2 */
  --text-3xl:  2.875rem;  /* 46px — h1 */
  --text-4xl:  3.75rem;   /* 60px — display */

  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7; /* long-form reading */

  --tracking-tight: -0.01em;
  --tracking-normal: 0;
  --tracking-wide: 0.04em;
  --tracking-caps: 0.08em;

  /* Semantic roles */
  --font-display: var(--font-sans);
  --font-heading: var(--font-sans);
  --font-body: var(--font-sans);
  --font-reading: var(--font-serif);
}