:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color-scheme:light dark;background:#fafafa;color:#111}body{margin:0;padding:0}.app{max-width:640px;margin:0 auto;padding:2.5rem 1.5rem 4rem}h1{margin:0 0 .25rem;font-size:1.75rem}.subtitle{margin:0 0 2rem;color:#666}label{display:block;font-size:.9rem;font-weight:600;margin:1.25rem 0 .4rem}.help{font-size:.8rem;color:#666;font-weight:400;margin-top:.25rem}input[type=text],input[type=password],input[type=file],select{width:100%;padding:.6rem .75rem;border:1px solid #d0d0d0;border-radius:6px;font-size:.95rem;background:#fff;box-sizing:border-box}button{margin-top:1.5rem;width:100%;padding:.75rem;border:0;border-radius:6px;background:#2b6cb0;color:#fff;font-size:1rem;font-weight:600;cursor:pointer}button:disabled{background:#aaa;cursor:not-allowed}.status{margin-top:2rem;padding:1rem;background:#fff;border:1px solid #e2e2e2;border-radius:8px}.status .stage{font-size:.85rem;color:#666;margin:.25rem 0 .75rem}.progress{height:8px;background:#eee;border-radius:4px;overflow:hidden}.progress>div{height:100%;background:#2b6cb0;transition:width .4s ease}.error{margin-top:1rem;padding:.75rem;background:#fde8e8;border:1px solid #f5b5b5;border-radius:6px;color:#8a1c1c;font-size:.9rem}.result{margin-top:1rem}.download-link{display:inline-block;margin-top:1rem;padding:.75rem 1.25rem;background:#2b6cb0;color:#fff;text-decoration:none;border-radius:6px;font-size:1rem;font-weight:600}.result-message{margin-top:1rem;font-size:1rem;font-weight:600}pre.debug{margin-top:1rem;padding:.75rem;background:#f5f5f5;border-radius:6px;font-size:.75rem;overflow-x:auto}