.card { border: none; border-radius: 0.75rem; }
.form-control:focus { box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.15); border-color: #86b7fe; }
.btn-primary { transition: background-color 0.2s ease, transform 0.1s ease; }
.btn-primary:active:not(:disabled) { transform: scale(0.98); }
.invalid-feedback { display: none; }
.is-invalid ~ .invalid-feedback { display: block; }
#formAlert { transition: opacity 0.3s ease; }