diff --git a/controller/internal/web/templates/style.css b/controller/internal/web/templates/style.css
index 446083c..8fa21f7 100644
--- a/controller/internal/web/templates/style.css
+++ b/controller/internal/web/templates/style.css
@@ -574,12 +574,10 @@ select.form-control { appearance: auto; }
 select.form-control option { background: var(--bg-secondary); color: var(--text-primary); }
 .input-with-button { display: flex; gap: .5rem; }
 .input-with-button .form-control { flex: 1; }
-.subdomain-input-group { display: flex; align-items: center; }
-.subdomain-input-group .subdomain-input { width: 8rem; border-top-right-radius: 0; border-bottom-right-radius: 0; border-right: none; }
+.subdomain-input-group { display: flex; align-items: center; gap: .5rem; }
+.subdomain-input-group .subdomain-input { width: 8rem; }
 .subdomain-input-group .subdomain-suffix {
-    padding: .55rem .75rem; background: var(--bg-primary); border: 1px solid var(--border-color);
-    border-left: none; border-radius: 0 8px 8px 0; color: var(--text-secondary);
-    font-family: var(--font-mono, monospace); font-size: .9rem; white-space: nowrap;
+    color: var(--text-secondary); font-size: .95rem; white-space: nowrap;
 }
 .form-hint { display: block; font-size: .8rem; color: var(--text-muted); margin-top: .25rem; }
 .required { color: var(--red); }