.input-group.is-invalid .form-control {
    border-color: #ea5455
}

.input-group.is-invalid .input-group-text {
    border-color: #ea5455
}

.input-group-disabled .input-group-text {
    background-color: rgba(75, 70, 92, 0.08);
    opacity: 1;
}

small.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.8125rem;
    color: #ea5455;
}

/*letter*/
.letter {
    font-family: "Times New Roman", Times, serif;
}