/* ============================================================
   STUDIE — TYPOGRAPHY
   Typeface: FF Unit (substituted by Fira Sans, see fonts.css).
   The CD favours Medium and Light weights; type is set tight,
   left-aligned, generous in size, with clear hierarchy.
   ============================================================ */
:root {
  /* Families */
  --font-sans: "Fira Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "Fira Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Semantic family aliases */
  --font-display: var(--font-sans);
  --font-heading: var(--font-sans);
  --font-body:    var(--font-sans);
  --font-ui:      var(--font-sans);
  --font-code:    var(--font-mono);

  /* Weights (FF Unit preferred: Light + Medium) */
  --weight-light:    300;
  --weight-regular:  400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;

  /* Type scale */
  --text-2xs: 0.6875rem;  /* 11px */
  --text-xs:  0.75rem;    /* 12px */
  --text-sm:  0.875rem;   /* 14px */
  --text-base:1rem;       /* 16px */
  --text-md:  1.125rem;   /* 18px */
  --text-lg:  1.375rem;   /* 22px */
  --text-xl:  1.75rem;    /* 28px */
  --text-2xl: 2.25rem;    /* 36px */
  --text-3xl: 3rem;       /* 48px */
  --text-4xl: 4rem;       /* 64px */
  --text-5xl: 5.5rem;     /* 88px */

  /* Line heights */
  --leading-tight:   1.05;
  --leading-snug:    1.18;
  --leading-heading: 1.12;
  --leading-normal:  1.5;
  --leading-relaxed: 1.65;

  /* Letter spacing */
  --tracking-tighter: -0.02em;
  --tracking-tight:   -0.01em;
  --tracking-normal:  0em;
  --tracking-wide:    0.04em;
  --tracking-caps:    0.08em;  /* for uppercase labels / eyebrows */
}