:root {
  --bg: #f7f5f2;
  --surface: #ffffff;
  --text: #1f1d1a;
  --muted: #6b665f;
  --border: #e4dfd8;
  --accent: #1f1d1a;
  --mp: #009ee3;
  --mp-hover: #007eb5;
  --ok-bg: #e8f6ec; --ok: #1e6b3a;
  --warn-bg: #fff6e0; --warn: #7a5300;
  --err-bg: #fdecec; --err: #9b1c1c;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; background: var(--surface); border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; font-size: 1.25rem; letter-spacing: .02em; color: var(--text); text-decoration: none; }
.container { max-width: 1100px; margin: 0 auto; padding: 24px 16px; display: grid; gap: 24px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .container { grid-template-columns: 1fr 340px; align-items: start; } }
h1 { font-size: 1.5rem; margin: 0 0 16px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px; display: flex; flex-direction: column; gap: 6px; }
.card h2 { font-size: 1rem; margin: 8px 0 0; }
.thumb { display: block; width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; background: var(--bg); border-radius: 8px; }
.price { font-weight: 700; font-size: 1.1rem; margin: 4px 0 8px; }
.muted { color: var(--muted); margin: 0; }
.small { font-size: .85rem; }
.cart { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px; position: sticky; top: 16px; }
.cart h2 { margin-top: 0; font-size: 1.15rem; }
.cart-lines { list-style: none; padding: 0; margin: 0 0 12px; }
.cart-lines li { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: .95rem; }
.checkout-total { font-size: 1.2rem; margin: 12px 0; }
.checkout-form { display: grid; gap: 10px; }
.checkout-form label { display: grid; gap: 4px; font-size: .9rem; color: var(--muted); }
.checkout-form input { padding: 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 1rem; }
.btn { display: inline-block; text-align: center; border: 0; border-radius: 8px; padding: 12px 16px; font-size: 1rem; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn-secondary { background: var(--accent); color: #fff; }
.btn-mp { background: var(--mp); color: #fff; font-size: 1.05rem; padding: 14px 16px; }
.btn-mp:hover { background: var(--mp-hover); }
.link-btn { background: none; border: 0; color: var(--muted); text-decoration: underline; cursor: pointer; font-size: .85rem; }
.alert { border-radius: 10px; padding: 14px 16px; margin-bottom: 12px; }
.alert h1 { margin: 0 0 6px; font-size: 1.3rem; }
.alert p { margin: 0; }
.alert-success { background: var(--ok-bg); color: var(--ok); }
.alert-warning { background: var(--warn-bg); color: var(--warn); }
.alert-error { background: var(--err-bg); color: var(--err); }
.result { grid-column: 1 / -1; max-width: 560px; }
.details { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 16px 0 24px; }
.details dt { color: var(--muted); }
.details dd { margin: 0; font-weight: 600; }
.footer { text-align: center; color: var(--muted); font-size: .85rem; padding: 32px 16px; }