Use cyan for mode bubbles, fix error-info width constraint

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

static/index.html

@@ -164,8 +164,9 @@
             content: '';
             position: absolute;
             top: 100%;
-            left: 0;
-            right: 0;
+            left: 50%;
+            transform: translateX(-50%);
+            width: 120px;
             height: 8px;
         }
 
@@ -357,11 +358,11 @@
         }
 
         .node .dante-info.tx-info {
-            background: #853;
+            background: #586;
         }
 
         .node .dante-info.rx-info {
-            background: #357;
+            background: #468;
         }
 
         .node .dante-info .dante-detail {
@@ -474,11 +475,11 @@
         }
 
         .node .artnet-info.out-info {
-            background: #753;
+            background: #586;
         }
 
         .node .artnet-info.in-info {
-            background: #357;
+            background: #468;
         }
 
         .node .artnet-info .artnet-detail {
@@ -577,7 +578,7 @@
             padding: 1px 6px;
             border-radius: 8px;
             white-space: nowrap;
-            background: #357;
+            background: #468;
             color: #fff;
             z-index: 10;
         }