/* Default blocks layout (no is-small/is-medium/is-large) */
.wc-block-checkout__shipping-fields .wc-block-components-address-form .wc-block-components-address-form__phone-fake,
.wc-block-checkout__billing-fields .wc-block-components-address-form .wc-block-components-address-form__phone-fake{
  flex: 1 0 calc(70% - 12px);
}

.wc-block-checkout__shipping-fields .wc-block-components-address-form .wc-block-components-address-form__phone-ext,
.wc-block-checkout__billing-fields .wc-block-components-address-form .wc-block-components-address-form__phone-ext {
  flex: 1 0 calc(30% - 12px);
}

/* Responsive layout with is-small/is-medium/is-large */
.is-large .wc-block-checkout__shipping-fields .wc-block-components-address-form .wc-block-components-address-form__phone-fake,
.is-medium .wc-block-checkout__shipping-fields .wc-block-components-address-form .wc-block-components-address-form__phone-fake,
.is-small .wc-block-checkout__shipping-fields .wc-block-components-address-form .wc-block-components-address-form__phone-fake,
.is-large .wc-block-checkout__billing-fields .wc-block-components-address-form .wc-block-components-address-form__phone-fake,
.is-medium .wc-block-checkout__billing-fields .wc-block-components-address-form .wc-block-components-address-form__phone-fake,
.is-small .wc-block-checkout__billing-fields .wc-block-components-address-form .wc-block-components-address-form__phone-fake{
  flex: 1 0 calc(30% - 12px);
}

.is-large .wc-block-checkout__shipping-fields .wc-block-components-address-form .wc-block-components-address-form__phone-ext,
.is-medium .wc-block-checkout__shipping-fields .wc-block-components-address-form .wc-block-components-address-form__phone-ext,
.is-small .wc-block-checkout__shipping-fields .wc-block-components-address-form .wc-block-components-address-form__phone-ext,
.is-large .wc-block-checkout__billing-fields .wc-block-components-address-form .wc-block-components-address-form__phone-ext,
.is-medium .wc-block-checkout__billing-fields .wc-block-components-address-form .wc-block-components-address-form__phone-ext,
.is-small .wc-block-checkout__billing-fields .wc-block-components-address-form .wc-block-components-address-form__phone-ext {
  flex: 1 0 calc(20% - 12px);
}

.wc-block-components-address-form__phone-ext + .wc-block-components-address-form__phone{
  display: none;
}