:root {
  /* ---- Surface ---- */
  --c-bg:            #F4EFE5;  /* page background, warm cream */
  --c-bg-alt:        #EDE6D9;  /* alternating section band */
  --c-surface:       #F8E6D2;  /* cards, panels, placeholder blocks */
  --c-border:        #D6C9B4;  /* hairline rules, card edges */
  --c-divider-on-surface: #CC9A6B;  /* dividers inside boxes */

  /* ---- Ink ---- */
  --c-text:          #3A322A;  /* body copy */
  --c-text-muted:    #6B6055;  /* captions, metadata, secondary */
  --c-text-muted-on-surface: #56483C;  /* muted text inside boxes (4.5:1) */
  --c-taupe:         #8C7A63;  /* decorative lines, tiling motif */
  --c-checkerboard:  #db5f00;  /* checkerboard tiles */

  /* RGB triplets for rgb(var(--x-rgb) / alpha) */
  --c-bg-alt-rgb:      237 230 217;
  --c-border-rgb:      214 201 180;
  --c-taupe-rgb:       140 122  99;
  --c-surface-rgb:     248 230 210;
  --c-accent-rgb:      166 106  74;
  --c-checkerboard-rgb: 226 133  63;

  /* ---- Accent ---- */
  --c-accent:        #A66A4A;  /* terracotta: links, active states */
  --c-accent-hover:  #8F5738;
  /* Alternate cool accent, swap in if preferred:
     --c-accent:       #2E4057;
     --c-accent-hover: #1F2C3C; */

  /* ---- Type ---- */
  --f-display: "PT Serif", Georgia, serif;
  --f-body:    "Source Serif 4", Georgia, serif;
  --f-label:   "PT Serif", Georgia, serif;

  --fs-xs:   0.8125rem;
  --fs-sm:   0.9375rem;
  --fs-base: 1.0625rem;
  --fs-lg:   1.25rem;
  --fs-xl:   1.75rem;
  --fs-2xl:  2.5rem;
  --fs-3xl:  3.5rem;

  --lh-tight: 1.15;
  --lh-body:  1.65;

  /* ---- Space ---- */
  --sp-1: 0.5rem;  --sp-2: 1rem;   --sp-3: 1.5rem;
  --sp-4: 2.5rem;  --sp-5: 4rem;   --sp-6: 6rem;

  --measure: 68ch;        /* max line length for prose */
  --container: 1140px;
}