:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1d2330;
  --muted: #667085;
  --border: #e3e6eb;
  --primary: #2f5bea;
  --primary-dark: #2449c4;
  --success: #12805c;
  --danger: #c0352b;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

button, .btn {
  font: inherit;
  border: 0;
  border-radius: 8px;
  padding: 9px 16px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
button:hover, .btn:hover { background: var(--primary-dark); text-decoration: none; }
button:disabled { opacity: .55; cursor: not-allowed; }
button.secondary { background: #eef1f6; color: var(--text); }
button.secondary:hover { background: #e1e6ee; }
button.danger { background: transparent; color: var(--danger); padding: 6px 8px; }
button.danger:hover { background: #fbeceb; }

input, select {
  font: inherit;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  min-width: 0;
}
input:focus, select:focus { outline: 2px solid rgba(47, 91, 234, .35); border-color: var(--primary); }

/* ------------------------------------------------------------ topo */
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.topbar-inner {
  max-width: 1200px; margin: 0 auto; padding: 12px 16px;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 1.2rem; color: var(--text); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.search { display: flex; gap: 8px; flex: 1 1 280px; }
.search input { flex: 1; }
.nav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.nav a { color: var(--text); font-weight: 500; }
.badge {
  display: inline-block; min-width: 20px; padding: 0 6px; border-radius: 999px;
  background: var(--primary); color: #fff; font-size: .75rem; text-align: center; line-height: 20px;
}
.user-chip { color: var(--muted); font-size: .9rem; display: inline-flex; gap: 8px; align-items: center; }

.container { max-width: 1200px; margin: 0 auto; padding: 24px 16px 48px; min-height: 70vh; }
.footer { text-align: center; color: var(--muted); font-size: .85rem; padding: 24px 16px; border-top: 1px solid var(--border); }

h1 { font-size: 1.5rem; margin: 0 0 16px; }
.muted { color: var(--muted); }

/* ------------------------------------------------------------ catálogo */
.catalog { display: grid; grid-template-columns: 220px 1fr; gap: 24px; }
.filters { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; align-self: start; }
.filters h2 { font-size: .9rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 0 0 8px; }
.filters a { display: flex; justify-content: space-between; padding: 6px 8px; border-radius: 6px; color: var(--text); }
.filters a:hover { background: #f0f3f8; text-decoration: none; }
.filters a.active { background: #e8eefc; color: var(--primary); font-weight: 600; }

.list-header { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.list-header h1 { margin: 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden;
}
.thumb { height: 130px; display: grid; place-items: center; font-size: 3rem; }
.card-body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card-body .cat { font-size: .78rem; color: var(--muted); }
.card-body .name { font-weight: 600; color: var(--text); }
.price { font-size: 1.15rem; font-weight: 700; }
.stock { font-size: .8rem; color: var(--success); }
.stock.low { color: var(--danger); }
.card-actions { margin-top: auto; display: flex; gap: 8px; }
.card-actions button { flex: 1; justify-content: center; }

.pagination { display: flex; justify-content: center; align-items: center; gap: 12px; margin-top: 24px; }

/* ------------------------------------------------------------ detalhe */
.detail { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.detail .thumb { height: 280px; border-radius: var(--radius); font-size: 6rem; }
.detail .price { font-size: 1.8rem; margin: 12px 0; }
.qty { display: flex; gap: 8px; align-items: center; margin: 16px 0; }
.qty input { width: 80px; }
.sku { font-family: ui-monospace, monospace; font-size: .85rem; color: var(--muted); }

/* ------------------------------------------------------------ painéis */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.auth { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; max-width: 820px; margin: 0 auto; }
.form { display: flex; flex-direction: column; gap: 12px; }
.form label { display: flex; flex-direction: column; gap: 4px; font-size: .9rem; font-weight: 500; }
.hint { background: #f0f5ff; border: 1px dashed #b8c8f5; border-radius: 8px; padding: 10px 12px; font-size: .85rem; }
.hint code { background: #fff; padding: 1px 5px; border-radius: 4px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
td.num, th.num { text-align: right; white-space: nowrap; }
.total-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: 20px; flex-wrap: wrap; }
.total-row .price { font-size: 1.5rem; }

.empty { text-align: center; padding: 48px 16px; color: var(--muted); }
.empty .big { font-size: 3rem; }
.success { border-color: #a6dcc6; background: #f1fbf6; }

.status { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .8rem; background: #e7f6ef; color: var(--success); }

.skeleton { color: var(--muted); padding: 40px 0; text-align: center; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: #1d2330; color: #fff; padding: 12px 18px; border-radius: 8px; box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
  max-width: calc(100% - 32px); z-index: 20;
}
.toast.error { background: var(--danger); }

@media (max-width: 760px) {
  .topbar { position: static; }
  .catalog { grid-template-columns: 1fr; }
  .filters { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px; }
  .filters h2 { width: 100%; }
  .filters a { padding: 4px 10px; border: 1px solid var(--border); border-radius: 999px; }
  .filters a span { display: none; }
  .detail { grid-template-columns: 1fr; padding: 16px; }
  .detail .thumb { height: 180px; }
  .nav { gap: 12px; font-size: .95rem; }
  th.hide-sm, td.hide-sm { display: none; }
}