:root {
  --bg: #f6f7f9; --card: #fff; --text: #1d2330; --muted: #6b7280; --line: #e3e6eb;
  --primary: #2457d6; --primary-text: #fff; --danger: #c62828; --ok: #1b7f3b; --warn: #a15c00;
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: 0 0 .75rem; }
h2 { font-size: 1.15rem; margin: 1.25rem 0 .5rem; }
.container { max-width: 1100px; margin: 0 auto; padding: 16px; }
.container.wide { max-width: 1500px; }
.show-sm { display: none; }
.stock-layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 20px; align-items: start; }
.cat-pane { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 8px; position: sticky; top: 8px; max-height: calc(100vh - 16px); overflow: auto; }
.cat-pane > summary { cursor: pointer; font-weight: 600; padding: 4px 6px; }
.tree { list-style: none; margin: 0; padding: 0 0 0 14px; font-size: .95rem; }
.cat-pane > .tree { padding-left: 0; }
.tree li { margin: 1px 0; }
.tree summary { cursor: pointer; padding: 3px 0; }
.tree a { color: var(--text); padding: 3px 6px; border-radius: 4px; display: inline-block; }
.tree a.leaf { margin-left: 14px; }
.tree a.sel { background: #e8efff; color: var(--primary); font-weight: 600; }
.tree .cnt { color: var(--muted); font-size: .8rem; }
.upd-split { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: 16px; align-items: start; }
.upd-file { position: sticky; top: 8px; max-height: calc(100vh - 16px); overflow: auto; }
.upd-file img { width: 100%; height: auto; }
.upd-table input[type=text] { min-height: 36px; padding: 6px 8px; }
.upd-table input.factor-input { width: 80px; text-align: right; }
.upd-table td { vertical-align: top; }
tr.row-error td { background: #fff5f5; }
@media (max-width: 899px) { .upd-split { display: block; } .upd-file { position: static; max-height: 60vh; } }
.sale-price { width: 110px; min-height: 34px; padding: 4px 8px; text-align: right; }
.sale-price.saved { border-color: var(--ok); background: #f1faf3; }
.sale-price.failed { border-color: var(--danger); background: #fff5f5; }
.total-line { text-align: right; margin: 10px 0; }
.line .price-input { width: 100%; }
.crumbs { margin: 0 0 8px; color: var(--muted); }
@media (min-width: 900px) {
  .cat-pane > summary { display: none; }
}
@media (max-width: 899px) {
  .stock-layout { display: block; }
  .cat-pane { position: static; max-height: none; margin-bottom: 12px; }
}
.topbar { background: #1d2330; color: #fff; display: flex; align-items: center; flex-wrap: wrap; padding: 0 16px; }
.topbar a, .topbar .link { color: #fff; }
.brand { font-weight: 700; padding: 14px 16px 14px 0; font-size: 1.1rem; }
.nav { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.nav a, .nav .link { padding: 14px 10px; display: inline-block; }
.nav-toggle, .nav-burger { display: none; }
.nav a.active { background: rgba(255, 255, 255, .14); }
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--line); margin-bottom: 12px; flex-wrap: wrap; }
.tabs a { padding: 10px 16px; color: var(--text); border-bottom: 3px solid transparent; margin-bottom: -2px; }
.tabs a.active { border-bottom-color: var(--primary); color: var(--primary); font-weight: 600; }
.tabs a:hover { text-decoration: none; background: #f0f2f5; }
.inv-table input.inv-actual { width: 110px; min-height: 36px; padding: 6px 8px; text-align: right; }
.inv-table td { vertical-align: middle; }
.link { background: none; border: 0; font: inherit; cursor: pointer; }
.inline { display: inline; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin-bottom: 16px; }
.narrow { max-width: 380px; margin: 40px auto; }
.head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.btn { display: inline-block; padding: 10px 16px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--text); font: inherit; cursor: pointer; min-height: 44px; }
.btn:hover { text-decoration: none; background: #f0f2f5; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn.danger { color: var(--danger); border-color: #f0c4c4; }
.btn.wide { width: 100%; }
input, select, textarea { font: inherit; padding: 9px 10px; border: 1px solid #c9ced6; border-radius: 6px; width: 100%; min-height: 44px; background: #fff; }
input[type=checkbox] { width: auto; min-height: auto; }
label { display: block; margin-bottom: 10px; font-size: .9rem; color: var(--muted); }
label > input, label > select, label > textarea { margin-top: 4px; color: var(--text); }
label.check { display: flex; gap: 6px; align-items: center; color: var(--text); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; }
.filters input[type=search] { flex: 1 1 260px; width: auto; }
.filters select { width: auto; }
.filters label.check { margin: 0; }
.table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.table th { background: #f0f2f5; font-weight: 600; font-size: .9rem; }
.num { text-align: right !important; white-space: nowrap; }
.zero { color: var(--muted); }
.pos { color: var(--ok); }
.neg { color: var(--danger); }
.muted, tr.muted td { color: var(--muted); }
.empty { text-align: center; color: var(--muted); padding: 24px; }
.badge { display: inline-block; font-size: .8rem; padding: 2px 8px; border-radius: 10px; background: #eceff3; color: var(--muted); vertical-align: middle; }
.badge.posted { background: #e3f4e8; color: var(--ok); }
.badge.cancelled { background: #fdecec; color: var(--danger); }
.badge.ordered { background: #e8efff; color: var(--primary); }
.badge.received { background: #e3f4e8; color: var(--ok); }
.badge.draft { background: #fff4e0; color: var(--warn); }
.msg { padding: 12px 14px; border-radius: 6px; margin-bottom: 12px; background: #e8efff; }
.msg-success { background: #e3f4e8; }
.msg-error { background: #fdecec; color: #7a1414; }
.errorlist { color: var(--danger); margin: 4px 0 0; padding-left: 18px; font-size: .9rem; }
.props { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
.props dt { color: var(--muted); }
.props dd { margin: 0; }
.big { font-size: 1.4rem; font-weight: 600; margin: 4px 0; }
.line { display: flex; gap: 12px; align-items: flex-start; border-bottom: 1px dashed var(--line); padding-top: 8px; }
.line .grow { flex: 1; }
.line label:not(.grow):not(.check) { width: 140px; }
.line label.check { margin-top: 30px; }
.pager { display: flex; gap: 12px; align-items: center; justify-content: center; margin: 16px 0; }
pre { background: #f0f2f5; padding: 10px; border-radius: 6px; overflow-x: auto; }

@media (max-width: 700px) {
  .hide-sm { display: none; }
  .show-sm { display: inline; }
  .nav-burger { display: block; margin-left: auto; padding: 12px; font-size: 1.4rem; cursor: pointer; }
  .nav { display: none; width: 100%; flex-direction: column; align-items: stretch; padding-bottom: 8px; }
  .nav-toggle:checked ~ .nav { display: flex; }
  .line { flex-wrap: wrap; }
  .line label:not(.grow):not(.check) { width: 60%; }
  .line .grow { flex-basis: 100%; }
  .line label.check { margin-top: 30px; }
  .table th, .table td { padding: 8px; }
}