diff --git a/eternity/styles/styles.css b/eternity/styles/styles.css
index 61f6944..dc806b9 100644
--- a/eternity/styles/styles.css
+++ b/eternity/styles/styles.css
@@ -261,6 +261,21 @@ select:focus,
   padding-left: 0;
 }
 
+/* Bootstrap rounds the outer corners of input-group children by default;
+   the icon addon also keeps its own light-blue background otherwise. */
+#login-form .input-group > .form-control,
+#login-form .input-group-text,
+#login-form .input-group .icon {
+  border-radius: 0 !important;
+}
+
+#login-form .input-group-text,
+#login-form .input-group .icon {
+  background-color: #fbfbf6;
+  border-color: var(--ink);
+  color: var(--ink);
+}
+
 #login-form input.form-control {
   width: 100%;
   box-sizing: border-box;