:root {
  --bg: #f5f5f4; --panel: #fff; --ink: #1c1917; --muted: #78716c; --line: #e7e5e4;
  --accent: #ea580c; --accent-soft: #fff1e6; --ok: #15803d; --bad: #b91c1c; --side: #1c1917;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  background: var(--bg); color: var(--ink); font-size: 15px; }
a { color: var(--accent); text-decoration: none; }
.layout { display: grid; grid-template-columns: 210px 1fr; min-height: 100vh; }
.side { background: var(--side); color: #d6d3d1; padding: 18px 0; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.side .brand { color: #fff; font-weight: 700; font-size: 18px; padding: 0 20px 4px; }
.side .shop { padding: 0 20px 16px; font-size: 13px; color: #a8a29e; border-bottom: 1px solid #292524; }
.side nav a { display: block; padding: 10px 20px; color: #d6d3d1; }
.side nav a:hover { background: #292524; }
.side nav a.on { background: var(--accent); color: #fff; }
.side .sep { margin: 12px 20px 4px; font-size: 12px; color: #78716c; }
main { padding: 24px 28px 60px; max-width: 1200px; min-width: 0; }
h1 { font-size: 22px; margin: 0 0 16px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
h1 .actions { margin-left: auto; display: flex; gap: 8px; }
h2 { font-size: 17px; margin: 24px 0 10px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.btn { display: inline-block; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 8px;
  padding: 7px 14px; cursor: pointer; font-size: 14px; font-family: inherit; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.danger { color: var(--bad); border-color: #fecaca; }
.btn.sm { padding: 3px 9px; font-size: 13px; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font-size: 13px; color: var(--muted); font-weight: 600; background: #fafaf9; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); font-size: 13px; }
.tag { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 999px; background: #f5f5f4; color: var(--muted); }
.tag.ok { background: #dcfce7; color: var(--ok); }
.tag.bad { background: #fee2e2; color: var(--bad); }
.tag.warn { background: var(--accent-soft); color: var(--accent); }
.messages { list-style: none; padding: 0; margin: 0 0 16px; }
.messages li { padding: 10px 14px; border-radius: 8px; background: #dcfce7; color: var(--ok); margin-bottom: 6px; }
.messages li.error { background: #fee2e2; color: var(--bad); }
/* forms */
.form-grid { display: grid; grid-template-columns: 160px 1fr; gap: 12px 16px; align-items: start; max-width: 720px; }
.form-grid label { padding-top: 7px; font-weight: 600; font-size: 14px; }
.form-grid .help { font-size: 12px; color: var(--muted); margin-top: 4px; }
.form-grid .err { color: var(--bad); font-size: 13px; }
input[type=text], input[type=number], input[type=password], input[type=email], input[type=time],
input[type=date], select, textarea { font: inherit; padding: 7px 10px; border: 1px solid #d6d3d1; border-radius: 7px; width: 100%; max-width: 420px; background: #fff; }
input[type=number] { max-width: 160px; }
.form-grid ul { list-style: none; padding: 0; margin: 0; columns: 2; }
.form-grid ul li { padding: 3px 0; }
.form-actions { margin-top: 20px; display: flex; gap: 10px; }
/* KPI */
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin-bottom: 16px; }
.kpi { background: #fff; padding: 12px 16px; }
.kpi .k { font-size: 12px; color: var(--muted); }
.kpi .v { font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; }
.range { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
.range a { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink); }
.range a.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.range form { display: flex; gap: 6px; align-items: center; }
.range input[type=date] { width: 150px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.bar { height: 8px; background: var(--accent); border-radius: 4px; min-width: 2px; }
/* menu */
.cat { background: #fff; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 12px; }
.cat > header { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--line); background: #fafaf9; border-radius: 10px 10px 0 0; cursor: pointer; }
.cat > header .name { font-weight: 700; }
.cat > header .actions { margin-left: auto; display: flex; gap: 6px; }
.cat.collapsed .products { display: none; }
.prod { display: grid; grid-template-columns: 24px 1fr 90px 1fr 110px 60px; gap: 10px; align-items: center; padding: 8px 14px; border-bottom: 1px solid #f5f5f4; }
.prod:last-child { border-bottom: 0; }
.prod.off { opacity: .55; }
.handle { cursor: grab; color: #a8a29e; user-select: none; }
.drag-over { outline: 2px dashed var(--accent); }
@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; }
  .side { position: static; height: auto; }
  .side nav { display: flex; flex-wrap: wrap; }
  .side .sep { display: none; }
  main { padding: 16px; }
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .grid2 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .prod { grid-template-columns: 20px 1fr 70px 90px; }
  .prod .opt, .prod .edit { display: none; }
}
/* phase 2 */
.hidden { display: none !important; }
.tabs-bar { display: flex; gap: 4px; margin-bottom: 12px; border-bottom: 1px solid var(--line); }
.tabs-bar button { border: 0; background: none; padding: 8px 16px; font: inherit; cursor: pointer; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs-bar button.on { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.chart-box { position: relative; height: 260px; }
.chart-box.wide { height: 300px; }
.range select { padding: 6px 8px; }
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
.stat-grid .card { margin: 0; }
.stat-grid .big { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.cal { table-layout: fixed; }
.cal td { height: 74px; vertical-align: top; position: relative; }
.cal td.out { background: #fafaf9; color: #d6d3d1; }
.cal td.today { outline: 2px solid var(--accent); outline-offset: -2px; }
.cal .d { font-size: 12px; color: var(--muted); }
.cal .amt { font-weight: 600; font-variant-numeric: tabular-nums; margin-top: 4px; }
.cal .heat { position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: var(--accent); }
.heat-table td { text-align: right; font-size: 12px; padding: 6px 4px; font-variant-numeric: tabular-nums; }
.heat-table th { text-align: center; padding: 6px 4px; }
.scroll-x { overflow-x: auto; }
.attr-table td, .attr-table th { padding: 4px 6px; white-space: nowrap; }
.attr-table input[type=number] { width: 80px; padding: 4px 6px; }
.attr-table input[type=text] { width: 130px; padding: 4px 6px; }
.attr-table tr.dirty td { background: #fff7ed; }
.attr-table th.c, .attr-table td.c { text-align: center; }
.attr-table .cat-row td { background: #f5f5f4; font-weight: 700; }
.toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.sticky-bar { position: sticky; bottom: 0; background: var(--bg); padding: 12px 0; display: flex; gap: 10px; align-items: center; }
@media (max-width: 800px) { .stat-grid { grid-template-columns: 1fr; } }