px; transition: border-color 0.3s ease; } .form-control:focus { border-color: #667eea; box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25); } .btn-login { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); border: none; color: white; padding: 15px; border-radius: 10px; font-weight: 600; font-size: 16