diff --git a/api/app/static/css/style.css b/api/app/static/css/style.css
index 958c000..8d160cf 100644
--- a/api/app/static/css/style.css
+++ b/api/app/static/css/style.css
@@ -1244,5 +1244,5 @@ tr.mapping-deleted td {
 .addr-card-row + .addr-card-row { border-top: 1px dashed var(--border-subtle); }
 .addr-card-source { font-size: 11px; font-weight: 500; color: var(--text-muted); margin-bottom: 2px; }
 .addr-card-text { font-family: var(--font-body); font-size: 13px; }
-.addr-card.mismatch { border-left: 3px solid var(--warning); }
+.addr-card.mismatch { background: var(--warning-light); }
 .addr-card.match .addr-match-label { font-size: 11px; color: var(--success-text); }