diff --git a/elemhide_inject.go b/elemhide_inject.go
index 1e90b2f..611ad04 100644
--- a/elemhide_inject.go
+++ b/elemhide_inject.go
@@ -151,7 +151,7 @@ func (p *proxyHandler) applyElementHiding(resp *http.Response, host, clientIP st
 		safeCSS := styleCloseRe.ReplaceAllString(css, `<\/style`)
 		styleTag := []byte("<style>" + safeCSS + "</style>")
 		modified = injectStyleTag(modified, styleTag)
-		rule := strings.Join(selectors, ", ")
+		rule := truncateRule(strings.Join(selectors, ", "), 80)
 		p.logActivity(ActivityElementHidden, host, "", rule, clientIP, credID)
 		logElementHidden(host, rule, clientIP, credID)
 	}
diff --git a/log.go b/log.go
index cb328f9..b36ac95 100644
--- a/log.go
+++ b/log.go
@@ -44,6 +44,14 @@ func shortUserID(credentialID string) string {
 	return credentialID
 }
 
+// truncateRule shortens a rule string to maxLen, appending "..." if truncated.
+func truncateRule(rule string, maxLen int) string {
+	if len(rule) <= maxLen {
+		return rule
+	}
+	return rule[:maxLen] + "..."
+}
+
 // logRequest logs a completed HTTP request at Debug level.
 // Only visible when --log-level=debug.
 func logRequest(method, url string, status int, duration time.Duration, clientIP, credentialID string) {