:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.5;color:#1f2933;background-color:#f5f7fa}body{margin:0;padding:0}.app{max-width:960px;margin:0 auto;padding:24px}.card{background:#fff;border-radius:8px;padding:24px;box-shadow:0 4px 10px #0f172a1a;margin-bottom:24px}.stepper{display:flex;gap:12px;margin-bottom:24px;flex-wrap:wrap}.stepper-step{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#e4ebf5;font-size:14px}.stepper-step.active{background:#2563eb;color:#fff}.buttons{display:flex;gap:12px;margin-top:16px}button.primary{background:#2563eb;color:#fff;border:none;border-radius:6px;padding:10px 16px;font-size:14px;cursor:pointer}button.secondary{background:transparent;border:1px solid #2563eb;color:#2563eb;border-radius:6px;padding:10px 16px;font-size:14px;cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:8px;border-bottom:1px solid #e5e7eb}input[type=number],input[type=text]{width:100%;padding:6px 8px;border:1px solid #d1d5db;border-radius:4px;font-size:14px}.upload-zone{border:2px dashed #94a3b8;border-radius:8px;padding:32px;text-align:center;background:#f8fafc}.progress{margin-top:16px;padding:12px;background:#eef2ff;border-radius:6px;font-size:14px}.downloads{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-top:16px}.downloads a{display:inline-flex;align-items:center;justify-content:center;padding:10px 12px;border:1px solid #2563eb;border-radius:6px;color:#2563eb;text-decoration:none;font-size:14px}.alert{padding:12px;border-radius:6px;background:#fee2e2;color:#991b1b;margin-top:16px}