.checker-container{max-width:600px;margin:2rem auto;padding:2rem;border:1px solid #ddd;border-radius:8px;text-align:center}.input-group{display:flex;margin-top:1.5rem}.input-group input{flex-grow:1;padding:.5rem;border:1px solid #ccc;border-radius:4px 0 0 4px}.input-group button{padding:.5rem 1rem;border:1px solid #0070f3;background-color:#0070f3;color:white;border-radius:0 4px 4px 0;cursor:pointer}.input-group button:disabled{background-color:#ccc;border-color:#ccc;cursor:not-allowed}.status-result{margin-top:1.5rem;padding:1rem;background-color:#f0f0f0;border-radius:4px}.error-message{color:red;margin-top:1rem}