#tel.invalid{border:2px solid #dc3545!important;background-color:#fff5f5!important;box-shadow:0 0 0 0.2rem rgba(220,53,69,0.15)!important}#tel.valid{border:2px solid #28a745!important;background-color:#f0fff4!important;box-shadow:0 0 0 0.2rem rgba(40,167,69,0.15)!important}.phone-error-message{color:#dc3545;font-size:14px;margin-top:5px;font-weight:500;animation:shake 0.3s}@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}