.form-error {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
    font-weight: 500;
}

.form-success {
    color: #28a745;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
    font-weight: 500;
}

.input-error {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25) !important;
}

.input-success {
    border-color: #28a745 !important;
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25) !important;
}

.send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .form-error,
    .form-success {
        font-size: 0.75rem;
    }
}