*{box-sizing:border-box}body{margin:0;background:#f4f7fb;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#1f2937}.card{max-width:480px;margin:6vh auto;padding:28px 22px;background:#fff;border-radius:18px;box-shadow:0 8px 30px #1f29371a}h1{margin:0 0 8px;font-size:24px}.gears{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:24px 0}.gear{padding:16px;border:1px solid #dbe3ef;border-radius:12px;cursor:pointer}.gear.selected{border:2px solid #1677ff;background:#eff6ff}.price{font-size:20px;font-weight:700;color:#1677ff}.muted{color:#6b7280;font-size:13px}button{width:100%;padding:14px;border:0;border-radius:12px;background:#1677ff;color:#fff;font-size:17px}button:disabled{background:#9fbce8}.status{min-height:22px;text-align:center;color:#6b7280}