/* ============================================================
   SETTINGS · TYPOGRAPHY
   Three families, three jobs:
   - PLAQUE  (Orbitron):    engraved control-panel labels, headings
   - DATA    (JetBrains):   readable monospace for body + data
   - TERMINAL (VT323):      CRT phosphor terminals, system messages
   - SEGMENT (DSEG7):       7-segment numeric readouts (optional fallback)
   ============================================================ */

:root {
  --font-plaque:    "Orbitron", "Eurostile", "Bank Gothic", system-ui, sans-serif;
  --font-data:      "JetBrains Mono", "Share Tech Mono", ui-monospace, Menlo, monospace;
  --font-terminal:  "VT323", "Courier New", ui-monospace, monospace;
  --font-display:   "Major Mono Display", "JetBrains Mono", ui-monospace, monospace;
  --font-segment:   "DSEG7 Classic", "JetBrains Mono", ui-monospace, monospace;

  /* Type scale — based on 16px root, 1.25 ratio for body, larger jumps for display */
  --fs-3xs:  0.625rem;   /* 10px — micro labels, legends */
  --fs-2xs:  0.6875rem;  /* 11px — plaque sub-labels */
  --fs-xs:   0.75rem;    /* 12px — secondary labels */
  --fs-sm:   0.875rem;   /* 14px — small body */
  --fs-md:   1rem;       /* 16px — body */
  --fs-lg:   1.125rem;   /* 18px — large body */
  --fs-xl:   1.5rem;     /* 24px — module title */
  --fs-2xl:  2rem;       /* 32px — section title */
  --fs-3xl:  2.75rem;    /* 44px — panel header */
  --fs-4xl:  4rem;       /* 64px — readouts, display */

  /* Weights */
  --fw-regular: 400;
  --fw-medium:  500;
  --fw-bold:    700;
  --fw-black:   900;

  /* Line heights */
  --lh-tight:   1.1;
  --lh-snug:    1.25;
  --lh-normal:  1.5;
  --lh-loose:   1.75;

  /* Letter spacing — plaques are always tracked out */
  --ls-tight:   -0.01em;
  --ls-normal:  0;
  --ls-wide:    0.08em;
  --ls-wider:   0.16em;   /* engraved plaque */
  --ls-widest:  0.32em;   /* legend caption, ALL CAPS micro */
}