.woocommerce-form-coupon--lauralisa .container {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
}

.woocommerce-form-coupon--lauralisa input[type='text'] {
    flex: 1 0 auto;
    width: auto;
}

.woocommerce-form-coupon--lauralisa .woocommerce-error {
    padding-left: 16px;
}