html, body { margin: 0; min-height: 100%; background: #f3f6f8; }
body { font-family: Arial, sans-serif; }
.standalone-notice { padding: 8px 20px; color: #31516a; background: #dcebf4; font-size: 12px; text-align: center; }
.payments-page { min-height: calc(100vh - 31px); }