The c-ok/c-bad/c-muted classes only set color (foreground), which has
no visible effect on an empty span with fixed dimensions. Adding
background-color makes the dots render with the intended fill.

Assisted-by: GLM-5.1 via pi

diff --git a/templates/_css.html b/templates/_css.html
index e9e0ef2..6cd3e89 100644
--- a/templates/_css.html
+++ b/templates/_css.html
@@ -184,9 +184,9 @@ pre { white-space: pre-wrap; word-break: break-word; }
 
 /* Color tokens */
 
-.c-ok { color: var(--ok); }
-.c-bad { color: var(--bad); }
-.c-muted { color: var(--muted); }
+.c-ok { color: var(--ok); background-color: var(--ok); }
+.c-bad { color: var(--bad); background-color: var(--bad); }
+.c-muted { color: var(--muted); background-color: var(--muted); }
 .c-accent { color: var(--accent); }
 
 /* Dark palette — activates when the OS signals dark mode. */