.btn-single-submit {
    position: relative;
    transition: all 0.3s ease;
}

.btn-single-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: scale(0.98);
}

.btn-single-submit .fa-spinner {
    display: none;
    margin-right: 8px;
}

.btn-single-submit.loading .fa-spinner {
    display: inline-block;
}

.btn-single-submit.loading .btn-text {
    opacity: 0.8;
}