body{margin:0;font-family:Arial,sans-serif}.container{max-width:720px;margin:0 auto;padding:24px}button,input,select{display:block;margin-bottom:12px}.result-image{width:100%;max-width:512px;border-radius:12px}.error-message{color:#dc2626;margin-top:12px;padding:12px;border:1px solid #dc2626;border-radius:4px;background-color:#fef2f2}