:root {
  /* Reading Room — warm paper, ink, and a deep reading-room green.
     The palette is deliberately calm: a single green accent does the
     work, with a warm gold reserved for transient/attention states. */
  --paper:    #faf7f0;  /* page background */
  --paper-2:  #f3eee2;  /* raised surfaces: search bar, cards */
  --ink:      #20201c;  /* primary text */
  --ink-soft: #44423b;  /* body prose, secondary text */
  --muted:    #837c6e;  /* meta, captions */
  --rule:     #e7e0d0;  /* hairline dividers */
  --rule-2:   #d8cfba;  /* stronger borders: inputs, buttons */
  --accent:   #2f6354;  /* deep green — links, primary actions */
  --accent-2: #6f9d8f;  /* lighter green — blockquote rule, dots */
  --accent-tint: #e7efe9; /* green wash for chips/focus rings */
  --gold:     #9a6a2f;  /* warm secondary: in-progress, failures */

  --shadow-sm: 0 1px 2px rgba(38, 33, 22, 0.05);
  --shadow-md: 0 8px 30px -12px rgba(38, 33, 22, 0.18);

  --font-ui: "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-prose: "Iowan Old Style", "Source Serif Pro", Charter, Georgia, serif;

  --measure: 40rem;  /* reading column */
  --feed: 46rem;     /* list/page column */

  /* Sharp, modern corners — small radii everywhere, no pills. */
  --r-sm: 3px;
  --r-md: 5px;
  --r-lg: 8px;

  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2.5rem;
  --s-7: 4rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:    #16161a;
    --paper-2:  #1f1f24;
    --ink:      #ece9e1;
    --ink-soft: #cbc7bc;
    --muted:    #908b80;
    --rule:     #2a2a31;
    --rule-2:   #383841;
    --accent:   #7fc3b0;
    --accent-2: #4f8475;
    --accent-tint: #1c2a26;
    --gold:     #d3a567;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 10px 30px -12px rgba(0, 0, 0, 0.6);
  }
}