body { font-family: Arial, sans-serif; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; background: #f0f0f0; }
.login-box { background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
input { padding: 10px; margin: 10px 0; width: 250px; border: 1px solid #ddd; border-radius: 4px; }
button { padding: 10px 20px; background: #007bff; color: white; border: none; border-radius: 4px; cursor: pointer; width: 100%; }
button:hover { background: #0056b3; }
.error { color: red; margin-top: 10px; }