diff --git a/apps/gui/ui/app.css b/apps/gui/ui/app.css
index e53772c..3fd19bb 100644
--- a/apps/gui/ui/app.css
+++ b/apps/gui/ui/app.css
@@ -212,6 +212,8 @@ details.adv[open] summary { margin-bottom: 10px; }
 .chip[aria-pressed="true"] { background: var(--text); color: var(--bg); }
 .chip small { opacity: .6; margin-left: 4px; font-variant-numeric: tabular-nums; }
 .input, .select { border: 0; border-radius: 12px; padding: 9px 14px; background: color-mix(in srgb, var(--text) 7%, transparent); color: var(--text); font: inherit; min-width: 0; }
+/* O fundo do select é translúcido; a lista aberta não herda isso e vinha branca com texto claro no tema escuro. */
+.select option, .select optgroup { background-color: var(--surface); color: var(--text); }
 .input { flex: 1 1 200px; }
 .input::placeholder { color: var(--text-3); }
 .split { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 18px; align-items: start; }