body{font-family:Arial,sans-serif;background:#f4f4f4;margin:0;padding:0}.app{display:grid;grid-template-columns:1fr 2fr;gap:2rem;padding:2rem}.forms,.preview{background:#fff;padding:1rem;border-radius:8px}input,select,button{display:block;margin-bottom:.5rem;padding:.4rem;width:100%;box-sizing:border-box}button{cursor:pointer}