style(game): add --mem-accent amber var (memory/humanity)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

styles.css

@@ -61,6 +61,11 @@
     /* Slider */
     --slider-color: #7a4f8a;
 
+    /* memory/humanity accent (recall line, recovered items, feedback pulses) —
+       distinct from the dried-blood red reserved for cruelty/bad-ending */
+    --mem-accent: #e0b283;
+    --mem-glow:   rgba(200,130,70,0.55);
+
     /* Typography */
     --font:      'Crimson Text', Georgia, 'Times New Roman', serif;
     --font-mono: 'Special Elite', 'Courier New', monospace;