.card{border:none;border-radius:1.25rem;box-shadow:0 .5rem 1.5rem rgba(0,0,0,.25)}.btn-gradient{background:linear-gradient(135deg,#667eea,#764ba2);border:none;color:#fff;transition:.2s}.btn-gradient:hover{opacity:.9;transform:scale(1.05)}.strength-bar{height:8px;border-radius:8px;background:#e9ecef;overflow:hidden}.strength-fill{height:100%;width:0;transition:.3s}