/* Design system of both pages (docs/product/ui.md §2): flat white cards on #f8fafc, one blue accent, Fira Sans,
   6 px / 4 px radius, no shadows, light theme only, desktop only (1440 and 1920 px). Components use the tokens, not colour codes. */
:root {
  color-scheme: light;
  --bg:#f8fafc; --surface:#ffffff; --sunken:#f1f5f9; --stage:#f4f5f7;
  --ink:#0f172a; --ink2:#334155; --muted:#475569; --line:#e2e8f0; --line2:#cbd5e1;
  --accent:#1e40af; --logo:#1e3a8a; --accent-soft:#eff6ff; --accent-line:#93c5fd;
  --ok:#15803d; --ok-soft:#f0fdf4; --ok-line:#bbf7d0;
  --bad:#b91c1c; --bad-soft:#fef2f2; --bad-line:#fecaca;
  --warn:#b45309; --warn-soft:#fffbeb; --warn-line:#fde68a;
  --brown:#7c4a03; --brown-soft:#fdf6ec; --brown-line:#d6b98c; --bad-ink:#7f1d1d;
  --r:6px; --r-sm:4px;
  --fs-12:12px; --fs-14:14px; --fs-16:16px; --fs-20:20px; --fs-26:26px; --fs-44:44px;
  --font:"Fira Sans", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --topbar-h:48px; --toolbar-h:52px; --panel-w:360px;
  /* aliases for older rules and inline styles */
  --panel:var(--surface);
}
* { box-sizing: border-box; }
[hidden] { display:none !important; }
html, body { margin:0; }
body { font:var(--fs-14)/1.5 var(--font); font-variant-numeric:tabular-nums; background:var(--bg); color:var(--ink); min-height:100dvh; display:flex; flex-direction:column; }
h1, h2, h3 { margin:0; line-height:1.25; }
h1 { font-size:var(--fs-20); font-weight:700; }
h2 { font-size:var(--fs-16); font-weight:700; }
h3 { font-size:var(--fs-12); font-weight:600; color:var(--ink2); }
a { color:var(--accent); }
.muted { color:var(--muted); font-size:var(--fs-12); }
.ok { color:var(--ok); font-weight:600; }
.bad { color:var(--bad); font-weight:600; }
.warn { color:var(--warn); }
.spacer { flex:1; }
.num, td.num { text-align:right; white-space:nowrap; }
:focus-visible { outline:2px solid var(--accent); outline-offset:2px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

/* ---- icons (icons.js) ---- */
i.ic { display:inline-flex; width:16px; height:16px; flex:none; vertical-align:-3px; }
i.ic svg { width:100%; height:100%; }
button > i.ic + *, button > * + i.ic { margin-left:0; }

/* ---- controls ---- */
select, input, button { font:inherit; color:inherit; }
select, input { width:100%; height:32px; background:var(--surface); border:1px solid var(--line2); border-radius:var(--r-sm); padding:0 8px; }
input[type=checkbox], input[type=radio] { width:auto; height:auto; accent-color:var(--accent); }
select { appearance:none; -webkit-appearance:none; padding-right:28px; cursor:pointer;
         background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 8px center; }
select:hover:not(:disabled) { border-color:var(--muted); }
/* range slider: a thin track filled up to --p (set by the page), a round accent thumb */
input[type=range] { -webkit-appearance:none; appearance:none; height:20px; padding:0; border:0; background:transparent; cursor:pointer; --p:0%; }
input[type=range]::-webkit-slider-runnable-track { height:6px; border-radius:3px; background:linear-gradient(to right, var(--accent) var(--p), var(--line) var(--p)); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance:none; width:16px; height:16px; margin-top:-5px; border-radius:50%; background:var(--accent); border:2px solid var(--surface); box-shadow:0 0 0 1px var(--accent); }
input[type=range]::-moz-range-track { height:6px; border-radius:3px; background:var(--line); }
input[type=range]::-moz-range-progress { height:6px; border-radius:3px; background:var(--accent); }
input[type=range]::-moz-range-thumb { width:12px; height:12px; border-radius:50%; background:var(--accent); border:2px solid var(--surface); box-shadow:0 0 0 1px var(--accent); }
input[type=range]:focus-visible { outline-offset:4px; }
input:disabled, select:disabled { background:var(--sunken); }
button { display:inline-flex; align-items:center; justify-content:center; gap:6px; min-height:32px; padding:0 12px; background:var(--surface);
         border:1px solid var(--line2); border-radius:var(--r-sm); cursor:pointer; white-space:nowrap; }
button:hover:not(:disabled) { background:var(--sunken); }
button:disabled { opacity:.5; cursor:not-allowed; }
button.primary { background:var(--accent); color:#fff; border-color:var(--accent); font-weight:600; }
button.primary:hover:not(:disabled) { background:#1e3a8a; }
button.danger { background:var(--bad); border-color:var(--bad); color:#fff; font-weight:600; }
button.danger:hover:not(:disabled) { background:#991b1b; }
button.ghost { border-color:transparent; background:transparent; }
button.ghost:hover:not(:disabled) { background:var(--sunken); }
button.icon { padding:0; width:32px; }
button.sm { min-height:28px; padding:0 8px; font-size:var(--fs-12); }
label { display:block; font-size:var(--fs-12); color:var(--muted); margin-top:8px; }
label.chk { display:flex; align-items:center; gap:6px; color:var(--ink); font-size:var(--fs-14); cursor:pointer; }
.row { display:flex; gap:8px; align-items:flex-start; }
.row.end { align-items:flex-end; }
.row > * { flex:1; min-width:0; }
.row > .chk, .row > button.fit { flex:none; }
.row.mid { align-items:center; }

/* ---- cards and tables ---- */
section.box { background:var(--surface); border:1px solid var(--line); border-radius:var(--r); padding:12px 14px; margin-bottom:12px; }
section.box > h2 { font-size:var(--fs-14); margin:0 0 8px; }
table { border-collapse:collapse; width:100%; font-size:var(--fs-12); }
td, th { text-align:left; padding:4px 6px; border-bottom:1px solid var(--line); vertical-align:top; }
th { color:var(--muted); font-weight:600; }
.sw { display:inline-block; width:10px; height:10px; border-radius:2px; margin-right:6px; }
tr.click { cursor:pointer; }
tr.click:hover { background:var(--sunken); }
tr.cur { background:var(--accent-soft); }
tr.hl td { background:#cffafe; font-weight:600; }
td.dir { white-space:nowrap; }
td.dir svg { vertical-align:middle; margin-right:4px; }
details > summary { cursor:pointer; font-size:var(--fs-12); color:var(--muted); list-style:none; display:flex; align-items:center; gap:8px; min-height:28px; }
details > summary::-webkit-details-marker { display:none; }
details > summary .chev { margin-left:auto; color:var(--muted); transition:transform .15s; }
details[open] > summary .chev { transform:rotate(180deg); }
.bar { height:8px; border-radius:4px; background:var(--line); overflow:hidden; }
.bar > div { height:100%; width:0; background:var(--accent); }
.bar.over > div { background:var(--warn); }
#msg { white-space:pre-line; margin-top:8px; }
.help { font-size:var(--fs-12); color:var(--muted); margin-top:2px; }
.tipwrap { position:relative; }
.info { display:inline-flex; align-items:center; justify-content:center; width:16px; height:16px; margin-left:4px; vertical-align:middle; color:var(--muted); cursor:help; border-radius:50%; }
.info .ic { width:14px; height:14px; vertical-align:0; }
.info:hover::after, .info:focus::after { content:attr(data-tip); position:absolute; left:0; top:24px; width:min(300px, 90vw); background:var(--ink); color:#fff; font-size:var(--fs-12); line-height:1.4;
  padding:6px 8px; border-radius:var(--r-sm); z-index:40; white-space:normal; font-style:normal; font-weight:400; text-align:left; }
.tipwrap.end .info:hover::after, .tipwrap.end .info:focus::after { left:auto; right:0; }

/* ---- top bar ---- */
.topbar { height:var(--topbar-h); flex:none; display:flex; align-items:center; gap:12px; padding:0 20px; background:var(--surface); border-bottom:1px solid var(--line); position:relative; z-index:20; }
.topbar .brand { display:flex; align-items:center; gap:10px; font-size:var(--fs-16); font-weight:700; color:var(--accent); text-decoration:none; white-space:nowrap; }
.topbar .brand svg { flex:none; }
.brand .logo-body { fill:var(--logo); }
.brand .logo-stripes { stroke:var(--accent-line); }
.badge { font-size:var(--fs-12); font-weight:700; letter-spacing:.04em; color:var(--warn); background:var(--warn-soft); border:1px solid var(--warn-line); border-radius:var(--r-sm); padding:0 8px; }
.popwrap { position:relative; }
.pop { position:absolute; right:0; top:calc(100% + 6px); width:360px; background:var(--surface); border:1px solid var(--line2); border-radius:var(--r); padding:12px 14px; z-index:50; }
.pop h2 { font-size:var(--fs-14); margin-bottom:6px; }
.menu { position:absolute; right:0; top:calc(100% + 4px); min-width:220px; background:var(--surface); border:1px solid var(--line2); border-radius:var(--r); padding:4px; z-index:50; display:flex; flex-direction:column; }
.menu button { justify-content:flex-start; border-color:transparent; }
#runlist .runrow { display:flex; align-items:center; gap:8px; padding:8px 0; border-bottom:1px solid var(--line); font-size:var(--fs-14); color:var(--ink); }
#runlist .runrow.sel { background:var(--accent-soft); }
#runlist .runrow .runinfo { flex:1; min-width:0; overflow-wrap:anywhere; }
#runlist .runrow .runinfo b { font-weight:700; }
.pop details { margin-top:8px; }
.pop details > summary { font-weight:600; color:var(--ink2); font-size:var(--fs-12); }
.pop details .row { margin-top:6px; }
#runlist .runrow button { flex:none; }

/* ---- screens ---- */
#app { flex:1; min-height:0; display:flex; flex-direction:column; }
.screen { flex:1; min-width:0; }
.page { max-width:1320px; margin:0 auto; padding:20px 24px 40px; }
.page.wide { max-width:none; }
.pagehead { display:flex; align-items:center; gap:12px; margin-bottom:16px; }
.pagehead h1 { flex:none; }
.twocol { display:grid; grid-template-columns:minmax(0,1fr) 340px; gap:20px; align-items:start; }
.stack { display:flex; flex-direction:column; }
.sticky { position:sticky; top:16px; }
details.adv { border-top:1px solid var(--line); margin-top:12px; padding-top:8px; }
details.adv > summary { font-size:var(--fs-14); color:var(--ink2); font-weight:600; }
details.adv > summary h2 { font-size:var(--fs-14); }
details.adv .advsum { display:block; font-weight:400; }
details.adv[open] .advsum { display:none; }
details.adv .row { margin-top:4px; }
section.box > details.adv { border-top:0; margin:0; padding:0; }
.solve { max-width:760px; margin:24px auto; }
.solve .solvecard { padding:28px; }
.solve .solvehead { display:flex; align-items:flex-start; gap:16px; }
.solve .solvehead > div { flex:1; min-width:0; }
.solve h1, .solve .solvelabel { font-size:var(--fs-12); font-weight:600; color:var(--muted); }
.solve #clock { font-size:var(--fs-44); font-weight:700; color:var(--ink); margin:4px 0 0; line-height:1.15; }
.solve #clock small { font-size:var(--fs-20); font-weight:400; color:var(--muted); }
.solve .bar { height:5px; margin:16px 0; }
.solve #bar[data-kind=queued] > div { background:var(--line2); }
.solve .promise { margin-top:0; }
.solve .keep { margin:14px 0 0; }
.solve .lotcard { margin-top:16px; padding:0; }
.solve .lotcardhd { display:flex; align-items:center; gap:10px; padding:12px 16px 8px; }
.solve .lotcardhd h2 { font-size:var(--fs-16); }
.solve .lottotals { padding:10px 16px; border-top:1px solid var(--line); }
.lfrow.ro { grid-template-columns:6px 56px minmax(0,1fr) auto; cursor:default; }
.lfrow.ro:hover { background:transparent; }
.failwrap { max-width:760px; margin:24px auto; }
.failwrap .alert { align-items:flex-start; padding:16px 18px; }
.alert.note { background:var(--sunken); border-color:var(--line2); color:var(--ink); }
.alert .failic { flex:none; margin-top:1px; }
.alert .failic i.ic { width:22px; height:22px; }
.alert h1 { font-size:var(--fs-16); color:inherit; }
.alert .failtext { margin:6px 0 0; }
.failacts { display:flex; flex-wrap:wrap; align-items:center; gap:8px; margin-top:12px; }
.failraw { font-size:var(--fs-12); opacity:.8; margin-left:4px; }
.runfields { display:grid; grid-template-columns:repeat(auto-fit, minmax(140px, 1fr)); gap:8px 12px; }

/* ---- viewer screens (result, one container, manual): the page scrolls; the scene is a card of fixed height ---- */
#scr-view { flex:none; display:flex; flex-direction:column; min-height:calc(100dvh - var(--topbar-h)); --scene-h:max(420px, calc(100dvh - 310px)); }
#vtool { flex:none; height:var(--toolbar-h); display:flex; align-items:center; gap:10px; padding:0 20px; background:var(--surface); border-bottom:1px solid var(--line); }
#vtool h1 { flex:none; }
#srclabel { font-size:var(--fs-12); color:var(--muted); min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
#vtool .vact { display:flex; gap:8px; align-items:center; }
.navbox { display:inline-flex; align-items:center; gap:6px; }
.navpos { min-width:3em; text-align:center; font-size:var(--fs-12); color:var(--muted); }
#vbody { flex:1; display:grid; grid-template-columns:minmax(0,1fr) var(--panel-w); align-items:start; }
#vbody.nopanel { grid-template-columns:minmax(0,1fr); }
#right { position:sticky; top:0; max-height:100dvh; overflow-y:auto; padding:12px 12px 12px 0; }
#right.collapsed { display:none; }
#center { position:relative; display:flex; flex-direction:column; gap:12px; padding:12px; min-width:0; }
#stage { position:relative; min-width:0; background:var(--stage); display:flex; flex-direction:column; border:1px solid var(--line); border-radius:var(--r); overflow:hidden; }
#viewport { position:relative; height:var(--scene-h); }
#stage:not(.in3d) { background:none; border:0; border-radius:0; overflow:visible; }
#stage:not(.in3d) #viewport, #stage:not(.in3d) #hud { display:none; }
#drawer { flex:none; position:relative; background:var(--surface); border:1px solid var(--line); border-radius:var(--r); display:flex; flex-direction:column; }
#dgrip { position:absolute; left:0; right:0; top:-4px; height:8px; cursor:ns-resize; z-index:5; touch-action:none; }
#drawer:not(.open) #dgrip, #drawer:not(.open) #dbody { display:none; }
#dtoggle { border:0; border-radius:0; background:transparent; justify-content:flex-start; padding:0 16px; width:100%; min-height:36px; }
#dbody { flex:1; min-height:0; overflow:auto; padding:0 16px 8px; }
#dbody th { position:sticky; top:0; background:var(--surface); }
#canvas { position:absolute; inset:0; width:100%; height:100%; display:block; }
#grid { display:grid; gap:12px; align-content:start; grid-template-columns:repeat(4, minmax(0, 1fr)); }
.cell { background:var(--surface); border:1px solid var(--line); border-radius:var(--r); overflow:hidden; cursor:pointer; font-size:var(--fs-12); }
.cell:hover, .cell:focus-visible { border-color:var(--accent); }
.cell canvas { width:100%; aspect-ratio:520 / 200; display:block; background:var(--stage); border-bottom:1px solid var(--line); }
.cellbody { padding:10px 12px; display:grid; gap:6px; }
.cellhead { display:flex; align-items:baseline; gap:8px; }
.cellhead b { font-size:var(--fs-16); }
.cellcost { font-size:var(--fs-14); }
.mrow { font-size:var(--fs-12); display:grid; grid-template-columns:72px 1fr auto; gap:8px; align-items:center; }
.mrow .num { min-width:3.2em; }
.rt { text-align:right; margin-top:-2px; }
.chips { display:flex; flex-wrap:wrap; gap:4px; }
.chip { display:inline-flex; align-items:center; gap:4px; font-size:var(--fs-12); background:var(--sunken); border:1px solid var(--line); border-radius:var(--r-sm); padding:0 6px; line-height:20px; white-space:nowrap; }
.chip .sw { margin-right:0; }
#hud { flex:none; padding:10px 16px; background:var(--surface); border-top:1px solid var(--line); }
#hud .row { align-items:center; }
#hud input[type=range] { flex:1; min-width:120px; }
#hud button, #hud select { flex:none; width:auto; }
#hud #speed { height:32px; }
.boxicon { display:inline-block; vertical-align:middle; margin-right:8px; }
.boxicon svg { display:block; }
#top { position:absolute; left:12px; top:10px; right:12px; display:flex; align-items:flex-start; gap:12px; pointer-events:none; z-index:3; }
#top > *, #viewopts > * { pointer-events:auto; }
.optbar, #banner { background:color-mix(in srgb, var(--surface) 92%, transparent); border:1px solid var(--line); border-radius:var(--r); padding:4px 8px; display:inline-flex; align-items:center; gap:12px; }
#banner { display:none; position:absolute; left:12px; bottom:10px; max-width:calc(100% - 24px); z-index:3; }
body.manual #banner { display:inline-flex; }
#viewopts { margin-left:auto; display:flex; flex-direction:column; align-items:flex-end; gap:6px; pointer-events:none; }
.optbar select { width:auto; max-width:16em; height:30px; }
.optbar .chk { margin:0; white-space:nowrap; }
#colorkey { max-width:340px; background:color-mix(in srgb, var(--surface) 92%, transparent); border:1px solid var(--line); border-radius:var(--r); padding:4px 8px; }
body[data-screen="container"] #box-result, body[data-screen="container"] #box-legend { display:none; }

/* result page and the grid of containers (also the manual packing's entry): in the page flow, no scene card */
#resview { padding:20px 24px 40px; }
#stage.in3d #resview { display:none; }
body[data-screen="result"] #right, body[data-screen="result"] #rcol, body[data-screen="result"] #top, body[data-screen="result"] #hud { display:none; }
body[data-screen="result"] #vbody { grid-template-columns:minmax(0,1fr); }
body[data-screen="result"] #center { padding:0; }
body[data-screen="manual"] #resview { padding:4px 4px 16px; }
body[data-screen="manual"] #restop, body[data-screen="manual"] #restiles,
body[data-screen="manual"] #reslines, body[data-screen="manual"] #resextra { display:none; }
.hint-edit, body.manual .hint-view { display:none; }
body.manual .hint-edit { display:inline; }
body.manual #hud { display:none !important; }
/* the manual grid: compact cards (no chips); "Thêm container" is a tile in the grid */
body.manual #grid { grid-template-columns:repeat(3, minmax(0, 1fr)); }
body.manual .cell .chips { display:none; }
#restop { margin-bottom:12px; font-size:var(--fs-14); }
.kpis { display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:12px; margin-bottom:20px; }
.card { background:var(--surface); border:1px solid var(--line); border-radius:var(--r); }
.kpi { padding:14px 16px; }
.kpi .lab { font-size:var(--fs-12); color:var(--muted); font-weight:600; }
.kpi .val { font-size:var(--fs-26); font-weight:700; margin-top:2px; line-height:1.25; display:flex; align-items:center; gap:6px; }
.kpi .val i.ic { width:24px; height:24px; }
.kpi .sub { font-size:var(--fs-12); color:var(--ink2); margin-top:2px; min-height:18px; }
.sechead { display:flex; align-items:baseline; gap:12px; margin-bottom:10px; }
#reslines, #resextra { margin-top:20px; display:flex; flex-direction:column; gap:16px; }
.card > .hd { display:flex; align-items:baseline; gap:10px; padding:12px 14px 0; }
.card .tablewrap { padding:8px 14px 12px; overflow-x:auto; }
#resextra .card { padding:12px 14px; }
#resextra .card > .hd { padding:0 0 8px; }
#resdetails table { margin-top:8px; }
ul.viol { margin:0; padding-left:18px; font-size:var(--fs-12); }
table.lines td, table.lines th { padding:6px 8px; vertical-align:middle; }
table.lines a { color:var(--accent); text-decoration:none; white-space:nowrap; }
table.lines a:hover { text-decoration:underline; }
table.lines a.cur { font-weight:700; }
.nowrap { white-space:nowrap; }
table.kv td:first-child { color:var(--muted); width:9em; }
.cihead { display:flex; align-items:center; gap:8px; margin-bottom:8px; }
.cihead h2 { font-size:var(--fs-14); }
.cstats { display:grid; grid-template-columns:max-content minmax(0,1fr); gap:6px 16px; align-items:start; font-size:var(--fs-14); }
.cstats .lab { color:var(--muted); font-size:var(--fs-12); line-height:20px; }
.cstats .val { text-align:right; line-height:20px; min-width:0; }
.cstats .meter { display:grid; grid-template-columns:minmax(0,1fr) 3.6em; gap:8px; align-items:center; }
.cstats .meter .num { font-size:var(--fs-12); }
.cstats .amount { text-align:right; line-height:16px; margin-top:2px; }
.stepinfo { display:flex; flex-wrap:wrap; gap:4px 6px; align-items:center; margin-top:6px; min-height:22px; font-size:var(--fs-12); color:var(--ink2); }
.stepinfo .lead { font-weight:700; color:var(--ink); font-size:var(--fs-14); margin-right:2px; }
#ordernote { margin-top:2px; }
dialog.wide { width:min(1100px, calc(100vw - 48px)); max-height:calc(100vh - 48px); padding:0; border:0; border-radius:8px; background:var(--surface); color:var(--ink); }
dialog.wide::backdrop { background:rgba(15,23,42,.45); }
dialog.wide .dlghead { display:flex; align-items:baseline; gap:12px; padding:14px 18px 8px; }
dialog.wide .dlgbody { padding:0 18px 16px; overflow:auto; max-height:calc(100vh - 140px); }

/* ---- lot screen (lotform.js, lotpreview.js) ---- */
.lotform { display:flex; flex-direction:column; gap:12px; min-width:0; position:relative; }
.lotform .lfdefs { position:absolute; width:0; height:0; overflow:hidden; }
.lfbar { display:flex; gap:8px; align-items:center; flex-wrap:wrap; }
.lfbar .grow, .lfcardhd .grow, .ehd .grow, .efoot .grow, .sumhead .grow { flex:1; }
.lfname { display:flex; align-items:center; gap:8px; margin:0; }
.lfname input { width:16em; }
.lfstatus { min-width:6em; }
.lferr { border-color:var(--bad) !important; background:var(--bad-soft) !important; }
.alert { display:flex; gap:12px; border-radius:var(--r); padding:12px 14px; border:1px solid; }
.alert.bad { background:var(--bad-soft); border-color:var(--bad-line); color:var(--bad-ink); font-weight:400; }
.alert ul { margin:6px 0 0; padding-left:18px; }
.alert li { margin:3px 0; }
.alert li a { color:inherit; font-weight:600; }
.lffile { margin-bottom:6px; font-weight:600; }
.lfdrop { border:1.5px dashed var(--line2); border-radius:var(--r); background:var(--surface); padding:22px; text-align:center; display:flex; flex-direction:column; align-items:center; gap:6px; }
.lfdrop .lfdropic { color:var(--accent); }
.lfdrop .lfdropic i.ic { width:32px; height:32px; }
section.box.lfcard { margin:0; padding:0; }
.lfcardhd { display:flex; align-items:center; gap:10px; padding:12px 16px 8px; }
.lfcardhd h2 { margin:0; font-size:var(--fs-16); }
.lflines { list-style:none; margin:0; padding:0; }
.lfrow { display:grid; grid-template-columns:6px 56px minmax(0,1fr) auto auto; gap:12px; align-items:center; padding:8px 16px 8px 0; border-top:1px solid var(--line); cursor:pointer; }
.lfrow { content-visibility:auto; contain-intrinsic-size:auto 64px; }
.lfrow:hover { background:var(--sunken); }
.lfrow.err { background:var(--bad-soft); }
.lfrow.err .lfstripe { background:var(--bad) !important; }
.lfstripe { align-self:stretch; border-radius:0 3px 3px 0; }
.lfthumb { display:block; width:56px; height:44px; }
.lfthumb svg { display:block; }
.lfttl { display:flex; align-items:baseline; gap:8px; flex-wrap:wrap; }
.lfttl b { font-size:var(--fs-16); }
.lfqty { font-weight:600; color:var(--ink2); }
.lfsub { font-size:var(--fs-12); color:var(--muted); }
.lfflags { display:flex; gap:6px; flex-wrap:wrap; justify-content:flex-end; }
.lfacts { display:flex; gap:4px; justify-content:flex-end; }
.lfemsg { grid-column:3 / -1; color:var(--bad); font-size:var(--fs-12); margin-top:-4px; }
.flag { display:inline-flex; align-items:center; gap:5px; font-size:var(--fs-12); border-radius:999px; padding:1px 9px; border:1px solid var(--line); background:var(--surface); color:var(--ink2); white-space:nowrap; }
.flag i.ic { width:12px; height:12px; }
.flag.ok { border-color:var(--ok-line); color:var(--ok); background:var(--ok-soft); }
.flag.red { border-color:var(--bad-line); color:var(--bad); background:var(--bad-soft); }
.flag.brown { border-color:var(--brown-line); color:var(--brown); background:var(--brown-soft); }
.flag.blue { border-color:var(--accent-line); color:var(--accent); background:var(--accent-soft); }
.flag.warn { border-color:var(--warn-line); color:var(--warn); background:var(--warn-soft); }
.lfempty { text-align:center; padding:28px 16px; color:var(--muted); display:flex; flex-direction:column; align-items:center; gap:8px; }
.lfemptyt { font-size:var(--fs-16); font-weight:600; color:var(--ink2); }
.lflegend { font-size:var(--fs-12); color:var(--muted); padding:8px 16px; border-top:1px solid var(--line); }
.lftypes { padding:10px 16px; }
.lftypes > summary { display:flex; align-items:center; gap:10px; }
.lftypes > summary h2 { font-size:var(--fs-14); display:inline; }
.lftypes .lftablewrap { overflow-x:auto; margin:8px 0; }
.lftypetable td, .lftypetable th { white-space:nowrap; vertical-align:middle; }
.lftypetable tr.click:hover td { background:var(--sunken); }
.lftypetable tr.err td { background:var(--bad-soft); }
.lftypetable .lfemsg { margin:0; font-weight:400; }
.lfmenu button { gap:8px; }
.lfmenu .lfmenudel { color:var(--bad); }
.lfdelbtn { color:var(--bad); }
.lfdropping::after { content:"Thả file lô (.json) vào đây"; position:fixed; inset:60px 24px 24px; z-index:30; display:grid; place-items:center; pointer-events:none;
  border:2px dashed var(--accent); border-radius:var(--r); background:color-mix(in srgb, var(--accent-soft) 88%, transparent); color:var(--accent); font-size:var(--fs-20); font-weight:700; }

/* edit dialog of one loại kiện / loại container */
dialog.ed { border:0; padding:0; border-radius:8px; width:min(960px, calc(100vw - 32px)); max-height:calc(100vh - 32px); color:var(--ink); background:var(--surface); overflow:hidden; }
dialog.ed[open] { display:flex; flex-direction:column; }
dialog.ed.narrow { width:min(560px, calc(100vw - 32px)); }
dialog.ed::backdrop { background:rgba(15,23,42,.45); }
dialog.ed .ehd { display:flex; align-items:center; gap:10px; padding:12px 18px; border-bottom:1px solid var(--line); flex:none; }
dialog.ed .ehd h2 { font-size:var(--fs-20); }
dialog.ed .lfsw { width:14px; height:14px; border-radius:3px; flex:none; background:var(--line2); }
dialog.ed .ebd { display:grid; grid-template-columns:minmax(0,1fr) 340px; min-height:0; overflow:auto; }
dialog.ed .eform { padding:16px 18px; display:flex; flex-direction:column; gap:14px; overflow:auto; min-width:0; }
dialog.ed .eprev { background:var(--stage); border-left:1px solid var(--line); display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px; padding:18px; }
dialog.ed .efoot { display:flex; align-items:center; gap:8px; padding:12px 18px; border-top:1px solid var(--line); background:var(--sunken); flex:none; }
dialog.ed label { margin:0; display:flex; flex-direction:column; gap:4px; font-size:var(--fs-12); font-weight:600; color:var(--ink2); }
dialog.ed .field { display:flex; flex-direction:column; gap:4px; }
dialog.ed .field > label { font-size:var(--fs-12); }
dialog.ed input[type=text] { height:38px; font-size:var(--fs-16); }
dialog.ed .lfidqty { display:grid; grid-template-columns:140px auto; gap:12px; align-items:end; }
dialog.ed .three { display:grid; grid-template-columns:repeat(3, 1fr); gap:10px; }
dialog.ed .three label { font-weight:400; color:var(--muted); }
dialog.ed .lfmass { display:flex; align-items:center; gap:8px; }
dialog.ed .lfmass input { width:160px; }
dialog.ed .lftypefields { display:grid; grid-template-columns:repeat(2, 1fr); gap:12px; }
dialog.ed .stepper { display:inline-grid; grid-template-columns:40px 80px 40px; height:38px; border:1px solid var(--line2); border-radius:var(--r-sm); overflow:hidden; align-self:flex-start; }
dialog.ed .stepper button { border:0; border-radius:0; background:var(--sunken); min-height:0; padding:0; }
dialog.ed .stepper input { border:0; border-left:1px solid var(--line); border-right:1px solid var(--line); border-radius:0; text-align:center; font-weight:600; min-width:0; }
.seg { display:inline-flex; border:1px solid var(--line2); border-radius:var(--r-sm); overflow:hidden; background:var(--surface); }
.seg button { border:0; border-radius:0; border-right:1px solid var(--line); background:none; padding:0 12px; font-weight:600; color:var(--ink2); min-height:34px; }
.seg button:last-child { border-right:0; }
.seg button.on { background:var(--accent-soft); color:var(--accent); box-shadow:inset 0 -2px 0 var(--accent); }
.seg button.red.on { background:var(--bad-soft); color:var(--bad); box-shadow:inset 0 -2px 0 var(--bad); }
.seg button.brown.on { background:var(--brown-soft); color:var(--brown); box-shadow:inset 0 -2px 0 var(--brown-line); }
dialog.ed .rule { display:grid; grid-template-columns:150px minmax(0,1fr); gap:10px; align-items:center; padding:10px 0; border-top:1px solid var(--line); }
dialog.ed .rule > div:first-child b { display:block; font-size:var(--fs-14); color:var(--ink); }
dialog.ed .rule > div:first-child span { font-size:var(--fs-12); color:var(--muted); font-weight:400; }
dialog.ed .rule .ctl { display:flex; gap:8px; align-items:center; flex-wrap:wrap; }
dialog.ed .rule .ctl input { width:120px; }
dialog.ed .rule.lferr { background:var(--bad-soft); }
dialog.ed .small { font-size:var(--fs-12); color:var(--muted); font-weight:400; }
dialog.ed .lfprev svg { display:block; }
dialog.ed .lfprevnone { height:230px; display:grid; place-items:center; }
dialog.ed .lfprevdims { font-size:var(--fs-12); font-weight:600; }
dialog.ed .lfprevhint { text-align:center; }
dialog.ed .lfbadge { font-size:var(--fs-12); border:1px dashed var(--warn); color:var(--warn); border-radius:var(--r-sm); padding:1px 6px; white-space:nowrap; }
dialog.ed button.lflink { background:none; border:none; color:var(--accent); padding:0; min-height:0; font-size:var(--fs-12); text-decoration:underline; }
dialog.ed .lfdlgerr { padding:8px 12px; }

/* right column of the lot screen */
button.lg { min-height:44px; padding:0 20px; font-size:var(--fs-16); }
button.block { width:100%; }
.sumhead { display:flex; align-items:center; gap:8px; margin-bottom:8px; }
.sumhead h2 { font-size:var(--fs-14); }
.pill { display:inline-flex; align-items:center; font-size:var(--fs-12); font-weight:600; border-radius:999px; padding:1px 9px; white-space:nowrap; }
.pill.ok { color:var(--ok); background:var(--ok-soft); }
.pill.bad { color:var(--bad); background:var(--bad-soft); }
.pill.note { color:var(--accent); background:var(--accent-soft); }
.sumgrid { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.stat { background:var(--sunken); border:1px solid var(--line); border-radius:var(--r-sm); padding:6px 10px; }
.stat b { display:block; font-size:var(--fs-20); }
.stat span { font-size:var(--fs-12); color:var(--muted); }
.promise { display:flex; gap:8px; font-size:var(--fs-12); color:var(--ink2); background:var(--sunken); border-radius:var(--r-sm); padding:8px 10px; margin-top:10px; }
.promise i.ic { margin-top:2px; }
.fieldlab { font-size:var(--fs-12); font-weight:600; color:var(--ink2); margin:8px 0 4px; }
.timeopts { display:grid; grid-template-columns:repeat(4, 1fr); gap:6px; }
.timeopts button { flex-direction:column; gap:0; padding:6px 2px; min-height:48px; }
.timeopts button b { font-size:var(--fs-14); }
.timeopts button span { font-size:var(--fs-12); color:var(--muted); }
.timeopts button.on { border-color:var(--accent); background:var(--accent-soft); box-shadow:inset 0 0 0 1px var(--accent); }
.why { text-align:center; margin-top:6px; }
.why:empty, #msg:empty { display:none; }

/* ---- manual packing (manual.js, #48): no placement order, so no replay bar; its own control bar replaces the toolbar ---- */
body.manual #canvas { cursor:crosshair; }
/* three columns: Chưa xếp | grid or scene | verdict, piece, container; the strip of controls sits under the title */
:root { --left-w:300px; }
body.manual #vbody { grid-template-columns:var(--left-w) minmax(0,1fr) var(--panel-w); }
body.manual #vbody.noleft { grid-template-columns:minmax(0,1fr) var(--panel-w); }
body.manual #vbody.nopanel, body.manual #vbody.gridview { grid-template-columns:var(--left-w) minmax(0,1fr); }
body.manual #vbody.noleft.nopanel, body.manual #vbody.noleft.gridview { grid-template-columns:minmax(0,1fr); }
body.manual #vbody.gridview #right { display:none; }
body[data-screen="manual"] #box-result { display:none; }
#mleft { position:sticky; top:0; max-height:100dvh; overflow-y:auto; padding:12px 0 12px 12px; }
body.manual #vtool { display:none; }
body.manual #vbody { align-items:start; }
body[data-screen="manual"] #box-legend, body.manual #pickinfo { display:none !important; }
#m-banner { flex:none; display:flex; align-items:baseline; flex-wrap:wrap; gap:4px 16px; margin:0; padding:8px 16px; border:0; border-bottom:1px solid; border-radius:0; }
#m-banner .small { font-size:var(--fs-12); }
.alert.okay { background:var(--ok-soft); border-color:var(--ok-line); color:var(--ok); }
.alert.note { color:var(--ink); }
.addcell { display:flex; align-items:center; justify-content:center; gap:6px; min-height:160px; border:1px dashed var(--line2); border-radius:var(--r); background:var(--surface); color:var(--muted); font-weight:600; }
.addcell:hover { border-color:var(--accent); color:var(--accent); background:var(--accent-soft); }
.mtool { flex:none; display:flex; flex-wrap:wrap; align-items:center; gap:8px; padding:8px 20px; min-height:var(--toolbar-h); background:var(--surface); border-bottom:1px solid var(--line); }
.mtool h1 { flex:none; }
.mtool > * { flex:none; }
.mtool .mright { display:flex; align-items:center; gap:8px; margin-left:auto; flex:none; }
.mtool .mlabel { flex:0 1 auto; white-space:nowrap; }
.mtool .msep { width:1px; height:24px; background:var(--line); }
.mtool .mfield input { width:100%; }
.mtool .mfield { margin-top:10px; }
.mtool .mfield label { margin:0 0 2px; }
.mtool .pop.mpop { right:0; left:auto; width:300px; }
.mtool select { width:auto; }
.mtool .mmsg { flex-basis:100%; }
.mtool .menu { right:0; left:auto; }
button.danger-line { color:var(--bad); border-color:var(--bad-line); }
button.danger-line:hover:not(:disabled) { background:var(--bad-soft); }
#mleft section.box, #right section.box { margin-bottom:12px; }
#m-piecehost section.box { border-color:var(--accent-line); }
.cell.bad { border-color:var(--bad); }
.cellhead .pill { flex:none; }
.mviols { list-style:none; margin:0; padding:0; }
.m-viol { display:flex; gap:10px; padding:8px 4px; border-top:1px solid var(--line); cursor:pointer; }
.m-viol:hover { background:var(--sunken); }
.m-viol .rb { flex:none; height:fit-content; font-size:var(--fs-12); font-weight:700; color:var(--bad); background:var(--bad-soft); border-radius:4px; padding:1px 6px; white-space:nowrap; }
.m-viol b { font-weight:600; }
.pad { display:grid; grid-template-columns:repeat(3, 38px); grid-template-rows:repeat(3, 34px); gap:4px; justify-content:center; margin-top:4px; }
.pad button { padding:0; min-height:0; font-weight:600; font-size:var(--fs-12); }
.pad .mid { display:grid; place-items:center; background:var(--sunken); border:1px dashed var(--line2); border-radius:var(--r-sm); font-size:var(--fs-12); color:var(--muted); }
.padhint { text-align:center; margin-top:4px; }
#m-z { padding:4px 0; }
#m-piecehost h2 { display:flex; align-items:center; }

/* ---- confirm dialog and toast ---- */
dialog.confirm { border:0; padding:0; border-radius:8px; width:min(420px, calc(100vw - 32px)); color:var(--ink); background:var(--surface); }
dialog.confirm::backdrop { background:rgba(15,23,42,.45); }
dialog.confirm .cbd { padding:18px 20px 8px; }
dialog.confirm .cbd p { margin:8px 0 0; color:var(--ink2); }
dialog.confirm .cft { display:flex; justify-content:flex-end; gap:8px; padding:12px 20px 18px; }
#toast { position:fixed; left:50%; bottom:20px; transform:translateX(-50%); z-index:60; display:flex; align-items:center; gap:14px; background:var(--ink); color:#f8fafc;
         border-radius:var(--r); padding:8px 10px 8px 16px; max-width:calc(100vw - 32px); }
#toast button { background:transparent; color:#bfdbfe; border-color:#334155; min-height:30px; }
#toast button:hover:not(:disabled) { background:#1e293b; }

/* actions of the result screen only */
body[data-screen="container"] #manualjob, body[data-screen="container"] #exportwrap,
body[data-screen="manual"] #manualjob, body[data-screen="manual"] #exportwrap { display:none; }

/* ---- demo: run screen and saved-runs table (demo/static/index.html, savedrules.js) ---- */
.dgrid { display:grid; grid-template-columns:360px minmax(0,1fr); gap:20px; align-items:start; }
.dgrid > aside > section.box { margin-bottom:12px; }
.dgrid .field, .loginform .field { display:flex; flex-direction:column; gap:4px; margin-top:12px; }
.dgrid .field:first-of-type, .loginform .field:first-of-type { margin-top:0; }
.dgrid .field > .lab { font-size:var(--fs-12); font-weight:600; color:var(--ink2); }
.dgrid .field > label, .loginform .field > label { margin-top:0; font-weight:600; color:var(--ink2); }
.dgrid .hint { font-size:var(--fs-12); color:var(--muted); }
.srcseg { display:flex; width:100%; }
.srcseg button { flex:1; }
.row.wrap { flex-wrap:wrap; }
.eng { display:flex; flex-direction:column; gap:6px; }
.eng label { display:flex; gap:10px; align-items:flex-start; border:1px solid var(--line); border-radius:var(--r-sm); padding:8px 10px; cursor:pointer; margin:0; color:var(--ink); font-size:var(--fs-14); }
.eng label:has(input:checked) { border-color:var(--accent); background:var(--accent-soft); }
.eng label.off { background:var(--sunken); cursor:not-allowed; }
.eng label input { margin-top:4px; }
.eng label > div { text-align:left; min-width:0; }
.eng label b { display:inline; font-size:var(--fs-14); }
.eng label .code { margin-left:6px; font-family:ui-monospace, Consolas, monospace; font-size:var(--fs-12); color:var(--muted); }
.eng label .d, .eng label .why { display:block; font-size:var(--fs-12); color:var(--muted); font-weight:400; }
.eng label .why { color:var(--warn); }
.params { display:grid; grid-template-columns:1fr 1fr; gap:10px 12px; margin-top:12px; }
.params .field { margin-top:0 !important; }
.params .wide { grid-column:1 / -1; }
.dgrid .actions { display:flex; gap:8px; margin-top:14px; }
.dgrid .actions button.primary { flex:1; min-height:40px; }
.dgrid .solve.inline { max-width:none; margin:0 0 16px; }
.dgrid .solve.inline .solvecard { padding:16px 20px; margin-bottom:0; }
.dgrid .solve.inline #clock { font-size:var(--fs-44); }
.dgrid #msg:empty { display:none; }
.lotcardbox { padding:0; }
.runtools { display:flex; align-items:center; gap:12px; margin-bottom:16px; }
.runtools .pagehead { margin:0; }
.runtools input { width:240px; }
table.runs { font-size:var(--fs-14); }
table.runs th { padding:8px 10px; background:var(--sunken); white-space:nowrap; font-size:var(--fs-12); }
table.runs td { padding:8px 10px; vertical-align:middle; }
table.runs code { font-size:var(--fs-12); }
table.runs tr.sub > td { background:var(--sunken); padding:8px 10px 12px 28px; }
table.runs tr.sub table { background:var(--surface); border:1px solid var(--line); font-size:var(--fs-12); }
table.runs tr.open > td { border-bottom-color:transparent; }
.runempty { padding:20px 14px; }