CouponCodeInput.css

.quiqqer-coupons-couponcodeinput {
    --_qui-error-text-color: var(--qui-error-text-color, red);
    --_qui-error-input-border-color: var(--qui-error-input-border-color, red);
    container-type: inline-size;
}

:where(.quiqqer-coupons-couponcodeinput label) {
    display: block;
    margin-bottom: 0.25em;
}

.quiqqer-coupons-couponcodeinput__inputGroup {
    display: inline-grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
}

.quiqqer-coupons-couponcodeinput-input {
    min-width: min(200px, 100cqi);
}

.quiqqer-coupons-remove {
    margin-left: 1rem;
}

/* error handling */
input.quiqqer-coupons-couponcodeinput-input[data-invalid] {
    border-color: var(--_qui-error-input-border-color)
}

.quiqqer-coupons-couponcodeinput__errorMsg:not([data-show]) {
    display: none;
}

:where(.quiqqer-coupons-couponcodeinput__errorMsg[data-show]) {
    font-size: 0.875rem;
    color: var(--_qui-error-text-color);
    margin-top: 0.25rem;
}

/**
 * Simple Checkout
 */
.quiqqer-coupons-field-simpleCheckout {
    margin-top: 1rem;
}

.quiqqer-coupons-field-simpleCheckout .quiqqer-coupons-couponcodeinput {
    background: var(--_sectionBgColor);
    padding: var(--_sectionPadding);
}

.quiqqer-coupons-field-simpleCheckout .quiqqer-coupons-couponcodeinput__inputGroup {
    width: 100%;
}

/*****************************/
/* media / container queries */
/*****************************/
@media screen and (max-width: 767px) {
    .quiqqer-coupons-couponcodeinput__inputGroup {
        width: 100%;
    }
}

@container (max-inline-size: 400px) {
    .quiqqer-coupons-couponcodeinput__inputGroup {
        grid-template-columns: 1fr;
    }
}