:root {
  color-scheme: light;
  --ink: #111418;
  --ink-2: #3d434b;
  --muted: #6b7280;
  --faint: #9aa1a9;
  --line: #e6e8eb;
  --line-2: #d4d8dd;
  --bg: #f6f7f8;
  --surface: #ffffff;
  --hover: #f2f3f5;
  --accent: #111418;
  --ok: #157a3c;   --ok-tint: #eff8f2;
  --warn: #a15c07; --warn-tint: #fdf6ec;
  --bad: #b42318;  --bad-tint: #fdf1f0;
  --radius: 12px;
  --sidebar: 232px;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); }
svg { width: 18px; height: 18px; flex: none; }
[hidden] { display: none !important; }
.muted { color: var(--muted); font-size: .8125rem; }
.mono, .loc { font-family: var(--mono); font-weight: 600; font-size: .92em; }

/* ================= shell ================= */
.app { display: grid; grid-template-columns: var(--sidebar) 1fr; min-height: 100vh; }

.sidebar {
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column;
  background: var(--surface); border-right: 1px solid var(--line);
  padding: 18px 12px;
}
.logo { display: flex; align-items: center; gap: 10px; padding: 0 8px 20px; }
.logo b { display: block; font-size: .95rem; letter-spacing: -.01em; }
.logo small { display: block; color: var(--muted); font-size: .75rem; margin-top: -2px; }
.logo-mark { width: 32px; height: 32px; border-radius: 8px; background: var(--accent); color: #fff; display: grid; place-items: center; flex: none; }

.nav { display: flex; flex-direction: column; gap: 2px; }
.nav a {
  display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 8px;
  color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: .875rem;
}
.nav a svg { color: var(--muted); }
.nav a:hover { background: var(--hover); }
.nav a.active { background: var(--hover); color: var(--ink); font-weight: 600; }
.nav a.active svg { color: var(--ink); }

.sidebar-foot { margin-top: auto; padding: 12px 10px 0; border-top: 1px solid var(--line); font-size: .8125rem; color: var(--muted); }
.conn { display: inline-flex; align-items: center; gap: 8px; }
.conn i { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px var(--ok-tint); }
.conn.off i { background: var(--bad); box-shadow: 0 0 0 3px var(--bad-tint); }

.main { min-width: 0; display: flex; flex-direction: column; }
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 12px;
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 16px 32px;
}
.titles { min-width: 0; flex: 1; }
.topbar h1 { margin: 0; font-size: 1.125rem; font-weight: 600; letter-spacing: -.015em; }
.topbar p { margin: 0; font-size: .8125rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mobile-only { display: none; }

.content { padding: 24px 32px 48px; width: 100%; max-width: 1280px; }
.view { display: flex; flex-direction: column; gap: 16px; }
.view.split { display: grid; grid-template-columns: minmax(320px, 400px) 1fr; align-items: start; gap: 16px; }

.tabbar { display: none; }

/* ================= building blocks ================= */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); min-width: 0; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); min-height: 52px; }
.panel-head h2 { margin: 0; font-size: .9375rem; font-weight: 600; }
.panel-body { padding: 18px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.stat span { display: block; font-size: .75rem; color: var(--muted); font-weight: 500; }
.stat b { display: block; font-size: 1.5rem; font-weight: 600; letter-spacing: -.02em; font-variant-numeric: tabular-nums; margin-top: 2px; }

/* ---------- controls ---------- */
input, select, button { font: inherit; }
input, select {
  width: 100%; height: 42px; padding: 0 12px; border-radius: 8px;
  border: 1px solid var(--line-2); background: var(--surface); color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder { color: var(--faint); }
input:focus, select:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px rgba(17, 20, 24, .08); }

.search { position: relative; display: block; max-width: 520px; }
.search svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--faint); pointer-events: none; }
.search input { padding-left: 38px; height: 44px; background: var(--surface); }

.form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field label { font-size: .8125rem; font-weight: 500; color: var(--ink-2); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.suffix { position: relative; }
.suffix input { padding-right: 52px; }
.suffix span { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); color: var(--faint); font-size: .8125rem; pointer-events: none; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 42px; padding: 0 16px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--line-2); background: var(--surface); color: var(--ink);
  font-size: .875rem; font-weight: 500; transition: background .15s;
}
.btn:hover { background: var(--hover); }
.btn:focus-visible, .nav a:focus-visible, .tabbar a:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn.primary:hover { background: #2a2f36; }
.btn.ghost { border-color: transparent; background: transparent; color: var(--ink-2); }
.btn.ghost:hover { background: var(--hover); }
.btn.sm { height: 32px; padding: 0 10px; font-size: .8125rem; }
.btn.block { width: 100%; }
.btn.icon { width: 42px; padding: 0; color: var(--muted); }
.btn.icon:hover { color: var(--bad); }
.btn.add { align-self: flex-start; padding: 0 8px; }
.btn svg { width: 16px; height: 16px; }

/* ---------- inventory table ---------- */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 12px 18px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table th { font-size: .6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); background: #fafbfb; padding-top: 10px; padding-bottom: 10px; }
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr:hover td { background: #fbfbfc; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table td.strong { font-weight: 600; }
.product-name { color: var(--ink-2); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 6px; padding: 3px 8px; font-size: .8125rem; background: #fafbfb; white-space: nowrap; }
.chip b { font-weight: 600; font-variant-numeric: tabular-nums; }
.chip .loc { font-size: .78rem; }
.chip small { color: var(--muted); font-size: .75rem; }

.empty { padding: 40px 18px; text-align: center; color: var(--muted); }
.empty b { display: block; color: var(--ink); font-weight: 600; margin-bottom: 4px; }

/* ---------- refill ---------- */
.storage-mini { border-top: 1px solid var(--line); padding-top: 14px; }
.storage-mini h3 { margin: 0 0 8px; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; }

.headline { font-size: 1.375rem; font-weight: 600; letter-spacing: -.02em; margin: 0; }
.headline + .muted { margin: 2px 0 0; font-size: .875rem; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: 10px; margin: 16px 0; }
.fact { padding: 12px 14px; }
.fact + .fact { border-left: 1px solid var(--line); }
.fact b { display: block; font-size: 1.375rem; font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.fact span { font-size: .75rem; color: var(--muted); }

.gauge { margin: 4px 0 16px; }
.gauge-bar { position: relative; height: 10px; background: var(--hover); border-radius: 999px; overflow: hidden; }
.gauge-bar i { position: absolute; top: 0; bottom: 0; left: 0; background: var(--line-2); }
.gauge-bar i.add { background: var(--ink); }
.gauge-legend { display: flex; justify-content: space-between; gap: 8px; font-size: .75rem; color: var(--muted); margin-top: 6px; }
.gauge-legend .key { display: inline-flex; align-items: center; gap: 6px; }
.gauge-legend .key::before { content: ""; width: 8px; height: 8px; border-radius: 2px; background: var(--line-2); }
.gauge-legend .key.add::before { background: var(--ink); }

.from { margin: 0; font-size: .875rem; color: var(--ink-2); }

/* status notes: neutral surface, colour on the edge and heading only */
.note { border-left: 3px solid var(--line-2); background: var(--bg); border-radius: 0 8px 8px 0; padding: 12px 14px; margin-top: 14px; font-size: .875rem; color: var(--ink-2); }
.note:first-child { margin-top: 0; }
.note strong { display: block; color: var(--ink); font-weight: 600; margin-bottom: 2px; }
.note p { margin: 4px 0 0; }
.note ul { margin: 6px 0 0; padding-left: 18px; }
.note.ok { border-color: var(--ok); background: var(--ok-tint); }
.note.ok strong { color: var(--ok); }
.note.warn { border-color: var(--warn); background: var(--warn-tint); }
.note.warn strong { color: var(--warn); }
.note.bad { border-color: var(--bad); background: var(--bad-tint); }
.note.bad strong { color: var(--bad); }

/* ---------- pick list ---------- */
.pick-head, .pick-line { display: grid; grid-template-columns: 1fr 96px 42px; gap: 8px; align-items: center; }
.pick-head { font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: -6px; }
.pick-lines { display: flex; flex-direction: column; gap: 8px; }

.route-list { list-style: none; margin: 14px 0 0; padding: 0; }
.route-list li { display: grid; grid-template-columns: 30px 1fr auto; gap: 14px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); }
.route-list li:last-child { border-bottom: 0; }
.seq { width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: .8125rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.route-list li.short .seq { background: var(--warn); }
.what .loc { display: block; font-size: 1rem; }
.what .name { display: block; font-size: .8125rem; color: var(--muted); }
.qty { text-align: right; font-weight: 600; white-space: nowrap; font-variant-numeric: tabular-nums; }
.qty small { display: block; font-weight: 400; font-size: .75rem; color: var(--muted); }
.route-list li.short .qty { color: var(--warn); }
.route-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); font-size: .8125rem; color: var(--muted); }
.route-foot b { color: var(--ink); font-weight: 600; }

/* ================= mobile ================= */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .mobile-only { display: grid; }
  .topbar { padding: 12px 16px; padding-top: max(12px, env(safe-area-inset-top)); }
  .topbar .conn { display: inline-flex; }
  .content { padding: 16px 16px calc(88px + env(safe-area-inset-bottom)); }
  .view.split { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat { padding: 12px 14px; }
  .stat b { font-size: 1.25rem; }
  .search { max-width: none; }

  .tabbar {
    display: grid; grid-template-columns: repeat(3, 1fr);
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
    background: rgba(255, 255, 255, .96); backdrop-filter: blur(8px);
    border-top: 1px solid var(--line);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .tabbar a {
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
    min-height: 60px; color: var(--muted); text-decoration: none; font-size: .6875rem; font-weight: 500;
  }
  .tabbar a svg { width: 22px; height: 22px; }
  .tabbar a.active { color: var(--ink); font-weight: 600; }

  /* inventory table becomes stacked cards */
  .table thead { display: none; }
  .table, .table tbody, .table tr, .table td { display: block; }
  .table tr { padding: 14px 16px; border-bottom: 1px solid var(--line); }
  .table tbody tr:last-child { border-bottom: 0; }
  .table td { border: 0; padding: 0; }
  .table tbody tr:hover td { background: none; }
  .table td.cell-sku { font-size: 1rem; }
  .table td.cell-name { margin-bottom: 10px; }
  .table td.cell-upc { display: none; }
  .table td.cell-locs { margin-bottom: 10px; }
  .table td.num { display: inline-block; text-align: left; margin-right: 20px; font-size: .875rem; }
  .table td.num::before { content: attr(data-label) " "; color: var(--muted); font-weight: 400; }
}

@media (max-width: 380px) {
  .field-row { grid-template-columns: 1fr; }
  .fact { padding: 10px; }
  .fact b { font-size: 1.15rem; }
}

/* ================= print (pick list) ================= */
@media print {
  .sidebar, .tabbar, .topbar, [data-view="picklist"] > .panel:first-child, #print { display: none !important; }
  .app, .view.split { display: block; }
  .content { padding: 0; }
  .panel { border: 0; }
  body { background: #fff; }
}