Fix low-contrast grey text in the Graph tab

--fog was too dark against the void background, and Gradio's own
stylesheet was overriding the centrality-ranking list color entirely
(computed color was near-black, not just dim). Brighten --fog and
force the rank/flag list color with !important.

app.py

@@ -870,7 +870,7 @@ CUSTOM_CSS = """
   --lime: #39ff14;
   --rose: #ff2d6b;
   --ice: #a8f0ff;
-  --fog: #5a7f92;
+  --fog: #9db9cc;
   --font-head: 'Orbitron', 'Share Tech Mono', monospace;
   --font-mono: 'JetBrains Mono', 'Space Mono', monospace;
   --font-body: 'Inter', sans-serif;
@@ -931,8 +931,8 @@ gradio-app, .gradio-container, body {
 .algo-row { display: flex; justify-content: space-between; padding: 5px 0; border-bottom: 1px solid rgba(0,229,255,0.06); font-size: 11px; }
 .algo-name { font-family: var(--font-mono); font-size: 9.5px; color: var(--fog); }
 .algo-val { font-family: var(--font-mono); font-size: 10px; color: var(--cyan); }
-.rank-list, .flag-list { list-style: none; margin: 4px 0 0; padding: 0; font-family: var(--font-mono); font-size: 10px; color: var(--ice); }
-.rank-list li, .flag-list li { padding: 3px 0; opacity: 0.85; }
+.rank-list, .flag-list { list-style: none; margin: 4px 0 0; padding: 0; font-family: var(--font-mono); font-size: 10px; }
+.rank-list li, .flag-list li { padding: 3px 0; color: var(--ice) !important; opacity: 1; }
 .pathway-text { font-family: var(--font-mono); font-size: 11px; color: var(--lime); line-height: 1.6; word-break: break-word; }
 
 .swarm-status { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 10px; margin-bottom: 6px; color: var(--ice); }