:root{font-family:Arial,Helvetica,sans-serif;color:#111827;background:linear-gradient(180deg,#eef2ff,#f8fafc)}*{box-sizing:border-box}html,body,#root{margin:0;width:100%;height:100%}body{overflow:hidden}.screen{width:100%;height:100%;padding:32px}.center{display:flex;align-items:center;justify-content:center}.center-column{display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center}.panel{width:100%;max-width:1100px;min-height:420px;background:#fffffff5;border-radius:28px;padding:42px;box-shadow:0 20px 60px #0f172a1a}.idle-panel{display:grid;gap:24px}.panel h1{margin:0 0 12px;font-size:52px;line-height:1.05}.panel p{margin:0;font-size:24px;color:#475569}.hint-box{margin-top:12px;display:flex;justify-content:space-between;align-items:center;padding:22px 24px;border-radius:18px;background:#eff6ff;color:#1d4ed8;font-size:24px;gap:16px}.product-panel{display:grid;gap:24px}.product-header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.badge{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;background:#ecfdf5;color:#047857;font-size:18px;font-weight:700}.product-code{color:#475569;font-size:22px}.product-main{display:grid;gap:28px;align-content:center;min-height:250px}.price-box{display:inline-block;width:fit-content;font-size:72px;font-weight:800;padding:20px 28px;border-radius:22px;background:#dcfce7;color:#166534}.code-box{margin-top:18px;padding:16px 24px;background:#fff;border-radius:16px;font-size:36px;font-weight:700;color:#991b1b}.error{border:2px solid #fecaca;background:#fef2f2}@media (max-width: 900px){.screen{padding:18px}.panel{padding:28px;min-height:320px}.panel h1{font-size:36px}.panel p,.hint-box,.product-code{font-size:18px}.price-box{font-size:48px}.code-box{font-size:24px}}