table.ecwid-Checkout-blockTitle button,
div.ecwid-Checkout-PasswordBlock {
  display: none;
}

table.ecwid-Checkout-blockTitle .ecwid-btn {
  display: none;
}

.ecwid-productBrowser-CheckoutPaymentDetailsPage .ecwid-btn.ecwid-btn--secondary.ecwid-btn--sign_in {
  display: none;
}

.ecwid-productBrowser-CheckoutShippingAddressPage .ecwid-btn.ecwid-btn--secondary.ecwid-btn--address_book_sign_in {
  display: none;
}