:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --brand: #1f5fbf;
  --brand-dark: #174a96;
  --brand-soft: #e8f0fc;
  --ok: #15803d;
  --warn: #b45309;
  --danger: #b91c1c;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(15 23 42 / 6%), 0 8px 24px rgb(15 23 42 / 6%);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.container { width: min(1200px, 100% - 32px); margin: 0 auto; }
.muted { color: var(--muted); }

/* header */
.site-header { position: sticky; top: 0; z-index: 10; background: rgb(255 255 255 / 92%); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.header-row { display: flex; align-items: center; gap: 16px; padding: 12px 0; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 500; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: var(--brand); color: #fff; font-weight: 800; }
.brand b { color: var(--brand); }
.search { flex: 1; display: flex; align-items: center; gap: 8px; padding: 0 12px; background: var(--bg); border: 1px solid var(--line); border-radius: 999px; color: var(--muted); }
.search:focus-within { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; padding: 10px 0; font: inherit; color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 8px; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 16px; border: 1px solid transparent; border-radius: 10px; font: inherit; font-weight: 600; font-size: 14px; cursor: pointer; transition: background .15s, border-color .15s; white-space: nowrap; }
.btn.primary { background: var(--brand); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--brand-dark); }
.btn.ghost { background: var(--surface); border-color: var(--line); color: var(--text); }
.btn.ghost:hover:not(:disabled) { border-color: var(--brand); color: var(--brand); }
.btn.danger { background: #fff; border-color: #fecaca; color: var(--danger); }
.btn.block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.icon-btn { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--text); font-size: 22px; line-height: 1; cursor: pointer; }
.icon-btn:hover { border-color: var(--brand); color: var(--brand); }
.badge { min-width: 22px; padding: 0 6px; border-radius: 999px; background: #fff; color: var(--brand); font-size: 12px; text-align: center; }

/* hero */
.hero { background: linear-gradient(135deg, #12356d, var(--brand)); color: #fff; padding: 36px 0; }
.hero h1 { margin: 0 0 6px; font-size: clamp(24px, 4vw, 34px); }
.hero p { margin: 0; opacity: .85; max-width: 640px; }

/* toolbar */
.toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 22px 0 14px; }
.result-count { margin: 0; color: var(--muted); font-size: 14px; }
.toolbar-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.check { display: flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }
select, input, textarea { font: inherit; color: var(--text); }
select { padding: 9px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }

.status { padding: 14px 16px; margin-bottom: 16px; border-radius: 10px; background: var(--brand-soft); color: var(--brand-dark); }
.status.error { background: #fef2f2; color: var(--danger); }

/* product grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(250px, 100%), 1fr)); gap: 18px; padding-bottom: 48px; }
.card { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: box-shadow .2s, transform .2s; }
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card.out { opacity: .6; }
.thumb { position: relative; display: grid; place-items: center; aspect-ratio: 4 / 3; background: linear-gradient(135deg, var(--tone-a), var(--tone-b)); color: rgb(255 255 255 / 92%); }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb .glyph { width: 52px; height: 52px; stroke-width: 1.5; }
.thumb .tag { position: absolute; top: 10px; left: 10px; padding: 2px 10px; border-radius: 999px; background: rgb(15 23 42 / 55%); color: #fff; font-size: 11px; letter-spacing: .04em; }
.card-body { display: flex; flex-direction: column; gap: 6px; flex: 1; padding: 14px 16px 16px; }
.card h3 { margin: 0; font-size: 15px; line-height: 1.35; }
.sku { font-size: 12px; color: var(--muted); font-family: ui-monospace, Menlo, monospace; }
.desc { margin: 0; font-size: 13px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.stock { font-size: 13px; font-weight: 600; color: var(--ok); }
.stock.low { color: var(--warn); }
.stock.none { color: var(--danger); }
.card-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: auto; padding-top: 10px; }
.price { font-size: 19px; font-weight: 800; }
.card-actions { display: flex; gap: 6px; }
.card-actions .btn { padding: 8px 12px; }

/* dialogs */
dialog { border: 0; padding: 0; color: var(--text); background: var(--surface); box-shadow: 0 24px 64px rgb(15 23 42 / 30%); }
dialog::backdrop { background: rgb(15 23 42 / 50%); backdrop-filter: blur(2px); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.dialog-head h2 { margin: 0; font-size: 18px; }
.modal { width: min(460px, 100% - 32px); border-radius: var(--radius); }
.modal.wide { width: min(640px, 100% - 32px); }
.modal-body { padding: 20px; }
.drawer { position: fixed; inset: 0 0 0 auto; margin: 0; width: min(440px, 100%); height: 100dvh; max-height: none; display: none; flex-direction: column; border-radius: 0; }
.drawer[open] { display: flex; }
.drawer-body { flex: 1; overflow-y: auto; padding: 16px 20px 24px; }

/* cart */
.empty { padding: 28px 0; text-align: center; color: var(--muted); }
.cart-item { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.cart-item strong { font-size: 14px; }
.cart-item .sub { font-size: 12px; color: var(--muted); }
.qty { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.qty button { width: 28px; height: 28px; border: 0; background: var(--bg); cursor: pointer; font-size: 16px; }
.qty button:hover { background: var(--brand-soft); }
.qty span { min-width: 30px; text-align: center; font-size: 13px; font-weight: 600; }
.link-btn { border: 0; background: none; color: var(--danger); font-size: 12px; cursor: pointer; padding: 0; }
.cart-line-right { text-align: right; display: flex; flex-direction: column; align-items: flex-end; gap: 4px; }

/* forms */
.form { display: flex; flex-direction: column; gap: 12px; }
.form h3 { margin: 20px 0 0; font-size: 15px; }
.form label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; font-weight: 600; color: var(--muted); }
.form input, .form textarea, .inline-form input { padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); font-weight: 400; resize: vertical; }
.form input:focus, .form textarea:focus, .inline-form input:focus { outline: 0; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.total-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; font-size: 16px; }
.total-row strong { font-size: 22px; }
.form-error { margin: 0; color: var(--danger); font-size: 13px; }
.inline-form { display: flex; gap: 8px; margin-bottom: 16px; }
.inline-form input { flex: 1; min-width: 0; font-family: ui-monospace, Menlo, monospace; font-size: 13px; }

/* confirm + tracking */
.token-box { display: flex; align-items: center; gap: 8px; margin: 12px 0 16px; padding: 10px; border: 1px dashed var(--brand); border-radius: 10px; background: var(--brand-soft); }
.token-box code { flex: 1; min-width: 0; word-break: break-all; font-size: 12px; }
.track-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; margin-bottom: 16px; }
.track-head strong { font-size: 18px; }
.pill { display: inline-block; align-self: flex-start; white-space: nowrap; padding: 3px 12px; border-radius: 999px; background: var(--brand-soft); color: var(--brand-dark); font-size: 13px; font-weight: 700; }
.pill.done { background: #dcfce7; color: var(--ok); }
.pill.cancelled { background: #fee2e2; color: var(--danger); }
.steps { display: flex; margin: 0 0 18px; padding: 0; list-style: none; }
.steps li { flex: 1; position: relative; text-align: center; font-size: 12px; color: var(--muted); }
.steps li::before { content: ""; display: block; width: 14px; height: 14px; margin: 0 auto 6px; border-radius: 50%; background: var(--line); position: relative; z-index: 1; }
.steps li::after { content: ""; position: absolute; top: 6px; left: -50%; width: 100%; height: 2px; background: var(--line); }
.steps li:first-child::after { display: none; }
.steps li.on { color: var(--text); font-weight: 600; }
.steps li.on::before, .steps li.on::after { background: var(--brand); }
.steps.cancelled li.on::before, .steps.cancelled li.on::after { background: var(--danger); }
.track-meta { margin: 0 0 12px; font-size: 14px; }
.track-item { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-top: 1px solid var(--line); font-size: 14px; }
.track-actions { margin-top: 16px; }

.site-footer { padding: 24px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; text-align: center; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 50; padding: 10px 18px; border-radius: 10px; background: var(--text); color: #fff; font-size: 14px; box-shadow: var(--shadow); }
.skeleton { height: 330px; border-radius: var(--radius); background: linear-gradient(90deg, #e9eef6 25%, #f3f6fb 50%, #e9eef6 75%); background-size: 200% 100%; animation: shimmer 1.2s infinite; }
@keyframes shimmer { to { background-position: -200% 0; } }

@media (max-width: 760px) {
  .header-row { flex-wrap: wrap; }
  .search { order: 3; flex-basis: 100%; }
  .header-actions { margin-left: auto; }
  .brand-name { display: none; }
  .toolbar-controls { width: 100%; }
  .toolbar-controls select { flex: 1; }
}