:root{--bg:#0f1420;--card:#1a2130;--fg:#e8edf5;--accent:#e0348b;--muted:#8b97ab}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,sans-serif;background:var(--bg);color:var(--fg)}
header{padding:20px 28px;background:var(--card);display:flex;justify-content:space-between;align-items:center}
h1{margin:0;font-size:22px}.node-badge{color:var(--muted);font-size:13px;font-family:monospace}
main{display:grid;grid-template-columns:1fr 340px;gap:24px;padding:28px;max-width:1100px;margin:0 auto}
h2{font-size:16px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.product{background:var(--card);border-radius:12px;padding:16px;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}
.product .name{font-weight:600}.product .price{color:var(--muted);font-size:14px}
button{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:9px 16px;cursor:pointer;font-weight:600}
button:disabled{opacity:.4;cursor:not-allowed}
#cart{background:var(--card);border-radius:12px;padding:18px;align-self:start}
#cart-items{list-style:none;padding:0;margin:0 0 12px}#cart-items li{display:flex;justify-content:space-between;padding:6px 0;font-size:14px}
.total{font-size:18px;font-weight:700;margin:12px 0}#order-result{margin-top:14px;color:#33d18f;font-family:monospace;font-size:13px}