.validation-message {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 80%;
    color: var(--dark-red);
}

.invalid ~ .validation-message {
    display: block;
}

:root {
    --alert-icon-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    --bs-dropdown-icon: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
}

/* Display error icon */
.form-control.invalid, .form-select.invalid {
    border-color: var(--dark-red);
    padding-right: calc(1.5em + 0.75rem);
    background-image: url('/img/red-circle-alert.svg');
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: var(--alert-icon-size);
}

/* If select element, also display dropdown icon */
.form-select.invalid {
    border-color: var(--dark-red);
    padding-right: 3.3em;
    background: url('/img/red-circle-alert.svg'), var(--bs-dropdown-icon), #fff;
    background-position: right 2em center, right .75rem center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem), 16px 12px;
    background-repeat: no-repeat;
}

.form-control.invalid:focus {
    border-color: var(--dark-red);
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

textarea.form-control.invalid {
    padding-right: calc(1.5em + 0.75rem);
    background-position: right calc(0.775em + 0.1875rem) center;
}


.form-check-input.invalid ~ .validation-message {
    display: block;
}