.m4w-phone-input-wrapper {
    display: flex;
    align-items: stretch;
    width: 100%;
}

.m4w-phone-input-wrapper #billing_phone_calling_code_select.m4w-phone-prefix-select {
    flex: 0 0 auto;
    width: auto;
    min-width: 96px;
    margin: 0;
    border-right: 0;
}

.m4w-phone-input-wrapper #billing_phone {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
}

.m4w-phone-input-wrapper #billing_phone::placeholder {
    color: #666;
    opacity: 1;
}

.m4w-phone-validation-error {
    color: var(--wc-red, currentColor);
    display: block;
    font-size: 0.85em;
    margin-top: 4px;
}