/* PartCraft part-modeling UI — toolbar | feature history · model · properties | status bar.
 * Tokens only (paper/model aware); hierarchy by line weight; no shadows. Same build as CadCraft's UI. */

.pc {
  display: grid;
  grid-template-columns: 16rem minmax(0, 1fr) 18.5rem;
  grid-template-rows: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "tools tools tools"
    "left stage right"
    "status status status";
  height: 100%;
  min-height: 0;
}

/* ---- Toolbar ---- */
.pc-tools {
  grid-area: tools;
  display: flex;
  flex-wrap: wrap;
  background: var(--sheet-2);
  border-bottom: var(--pen-2) solid var(--ink);
  scrollbar-width: thin;
}
.pc-tool-group { display: flex; flex-direction: column; padding: .25rem .35rem .3rem; border-right: var(--pen-1) solid var(--line); flex: 0 0 auto; }
.pc-tool-group:last-of-type { border-right: 0; }
.pc-tool-label { font-size: .75rem; font-weight: 600; color: var(--ink-2); padding: 0 .2rem .15rem; }
.pc-tool-row { display: flex; gap: .1rem; align-items: stretch; }
.pc-tool {
  display: flex; flex-direction: column; align-items: center; gap: .1rem;
  min-width: 2.6rem; padding: .25rem .2rem .2rem;
  font: inherit; font-size: .71875rem; font-weight: 600; color: var(--ink);
  background: transparent; border: var(--pen-1) solid transparent; border-radius: var(--radius);
  cursor: pointer; white-space: nowrap; list-style: none;
}
.pc-tool::-webkit-details-marker { display: none; }
.pc-tool .bi { font-size: 1.15rem; line-height: 1; color: var(--layer); }
.pc-tool:hover { border-color: var(--line); background: var(--sheet); }
.pc-tool:focus-visible { outline: var(--pen-3) solid var(--action); outline-offset: 1px; }
.pc-tool[aria-pressed="true"] { border-color: var(--ink); background: var(--sheet); }
.pc-tool:disabled { opacity: .4; cursor: default; }
.pc-tool[hidden], .pc-tool-group[hidden] { display: none; }
.pc-tool:disabled:hover { border-color: transparent; background: transparent; }
.pc-menu { position: relative; }
.pc-menu[open] > summary { border-color: var(--ink); background: var(--sheet); }
.pc-menu-list {
  position: absolute; z-index: 30; top: calc(100% + .25rem); left: 0; min-width: 15rem;
  display: flex; flex-direction: column; padding: .3rem;
  background: var(--sheet-2); border: var(--pen-2) solid var(--ink); border-radius: var(--radius);
}
.pc-menu-right { left: auto; right: 0; min-width: 10rem; }
.pc-menu-list .pc-menu-link { display: block; text-decoration: none; }
.pc-menu-list button, .pc-menu-list .pc-menu-link { font: inherit; font-size: .875rem; font-weight: 500; text-align: left; color: var(--ink); background: none; border: 0; border-radius: var(--radius); padding: .35rem .5rem; cursor: pointer; }
.pc-menu-list button:hover, .pc-menu-list button:focus-visible, .pc-menu-list .pc-menu-link:hover, .pc-menu-list .pc-menu-link:focus-visible { background: var(--sheet); outline: none; }
.pc-menu-list button:disabled { opacity: .45; cursor: default; }

body.app-shell .sp-tab { bottom: 3rem; }

/* ---- Panels ---- */
.pc-panel { overflow-y: auto; min-height: 0; background: var(--sheet-2); }
.pc-left { grid-area: left; border-right: var(--pen-2) solid var(--ink); }
.pc-right { grid-area: right; border-left: var(--pen-2) solid var(--ink); }
.pc-sec { padding: .9rem 1rem; border-bottom: var(--pen-1) solid var(--line); }
.pc-sec:last-child { border-bottom: 0; }
.pc-sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: .5rem; margin-bottom: .5rem; }
.pc-h { font-size: var(--fs-sm); font-weight: 700; font-stretch: 112%; margin: 0 0 .5rem; overflow-wrap: anywhere; }
.pc-sec-head .pc-h { margin: 0; }
.pc-note, .pc-muted { color: var(--ink-2); font-size: .875rem; margin: .5rem 0 0; }
.pc-linkbtn { font: inherit; font-size: .875rem; font-weight: 600; color: var(--action); background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 2px; }
.pc-linkbtn:hover { text-decoration-thickness: 2px; }
.pc kbd { font-family: inherit; font-size: .8125rem; font-weight: 700; padding: 0 .3rem; color: var(--ink); background: var(--sheet); border: var(--pen-1) solid var(--line); border-radius: var(--radius); }

.pc-input, .pc-select {
  width: 100%; min-width: 0; font: inherit; font-size: .875rem; font-weight: 500; color: var(--ink);
  background: var(--sheet); border: var(--pen-1) solid var(--line); border-radius: var(--radius);
  padding: .2rem .4rem; font-variant-numeric: tabular-nums;
}
.pc-input:focus, .pc-select:focus { outline: var(--pen-2) solid var(--action); outline-offset: 0; border-color: var(--action); }

/* feature tree */
.pc-tree { list-style: none; margin: 0; padding: 0; font-size: .875rem; }
.pc-tree li { margin: 0; }
.pc-node {
  display: grid; grid-template-columns: 1.2rem minmax(0, 1fr) auto; align-items: center; gap: .35rem;
  width: 100%; padding: .22rem .35rem; font: inherit; color: var(--ink); text-align: left;
  background: transparent; border: var(--pen-1) solid transparent; border-radius: var(--radius); cursor: pointer;
}
.pc-node .bi { color: var(--layer); }
.pc-node:hover { border-color: var(--line); }
.pc-node:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: -1px; }
.pc-node[aria-selected="true"] { border-color: var(--ink); background: var(--sheet); font-weight: 700; }
.pc-node-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pc-node-flag { font-size: .8125rem; color: var(--ink-2); }
.pc-node.is-child { padding-left: 1.4rem; }
.pc-node.is-error .pc-node-flag, .pc-node.is-error .bi { color: var(--layer-red); }
.pc-node.is-warn .pc-node-flag { color: var(--layer-ochre); }
.pc-node.is-off .pc-node-name, .pc-node.is-rolled .pc-node-name { color: var(--ink-2); }
.pc-node.is-off .pc-node-name { text-decoration: line-through; }
.pc-node.is-rolled { opacity: .55; }
.pc-tree-sep { border-top: var(--pen-1) solid var(--grid); margin: .3rem 0; }
.pc-rollbar {
  display: block; width: 100%; margin: .2rem 0; padding: .1rem .35rem; font: inherit; font-size: .75rem; font-weight: 700;
  color: var(--layer-blue); text-align: left; background: none; border: 0; border-top: var(--pen-3) solid var(--layer-blue); cursor: pointer;
}
.pc-rollbar:focus-visible { outline: var(--pen-2) solid var(--action); }

.pc-dl { display: grid; grid-template-columns: fit-content(55%) minmax(0, 1fr); gap: .25rem .75rem; margin: 0; font-size: .875rem; }
.pc-dl dt { color: var(--ink-2); font-weight: 500; }
.pc-dl dd { margin: 0; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }

/* properties */
.pc-props { display: grid; grid-template-columns: fit-content(45%) minmax(0, 1fr); gap: .4rem .6rem; align-items: center; font-size: .875rem; margin: 0; }
.pc-props label, .pc-props .k { color: var(--ink-2); font-weight: 500; }
.pc-props .v { font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.pc-props .span { grid-column: 1 / -1; }
.pc-props-sub { grid-column: 1 / -1; margin: .5rem 0 0; font-size: .8125rem; font-weight: 700; color: var(--ink-2); }
.pc-check { display: flex; align-items: center; gap: .45rem; font-size: .875rem; cursor: pointer; }
.pc-check input { accent-color: var(--action); }
.pc-range { width: 100%; accent-color: var(--action); }
.pc-checks { display: grid; gap: .2rem; grid-column: 1 / -1; }
.pc-block + .pc-block { margin-top: .9rem; padding-top: .75rem; border-top: var(--pen-1) solid var(--grid); }
.pc-actions { display: flex; flex-wrap: wrap; gap: .4rem; }
.pc-btn {
  font: inherit; font-size: .8125rem; font-weight: 600; color: var(--ink); background: var(--sheet);
  border: var(--pen-1) solid var(--line); border-radius: var(--radius); padding: .2rem .55rem; cursor: pointer;
}
.pc-btn:hover { border-color: var(--ink); }
.pc-btn:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: 1px; }
.pc-btn:disabled { opacity: .45; cursor: default; }
.pc-btn.is-primary { color: var(--on-action); background: var(--action); border-color: var(--action); }
.pc-btn.is-danger { color: var(--layer-red); }
.pc-msg { margin: 0 0 .75rem; padding: .5rem .6rem; font-size: .875rem; border-left: var(--pen-3) solid var(--layer-ochre); background: var(--sheet); }
.pc-msg.is-error { border-left-color: var(--layer-red); }
.pc-msg.is-ok { border-left-color: var(--layer-green); }
.pc-msg p { margin: 0; }
.pc-list { list-style: none; margin: 0; padding: 0; font-size: .875rem; }
.pc-list li { display: flex; align-items: center; gap: .4rem; padding: .18rem 0; border-top: var(--pen-1) solid var(--grid); }
.pc-list li:first-child { border-top: 0; }
.pc-list .grow { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pc-list .is-bad { color: var(--layer-red); font-weight: 700; }
.pc-dimrow { font-size: .875rem; display: grid; grid-template-columns: minmax(0, 1fr) 6rem; gap: .5rem; align-items: center; }
.pc-legend { display: flex; flex-wrap: wrap; gap: .25rem .9rem; font-size: .8125rem; color: var(--ink-2); margin-top: .5rem; }
.pc-legend i { display: inline-block; width: .8rem; height: .2rem; vertical-align: middle; margin-right: .3rem; }

/* ---- Stage ---- */
.pc-stage { grid-area: stage; position: relative; min-width: 0; min-height: 0; overflow: hidden; background: var(--sheet); }
.pc-gl, .pc-sketch { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }
.pc-sketch { cursor: crosshair; }
.pc-sketch[data-tool="select"] { cursor: default; }
.pc-dim-input {
  position: absolute; z-index: 5; width: 6rem; font: inherit; font-size: .9375rem; font-weight: 700;
  color: var(--ink); background: var(--sheet-2); border: var(--pen-2) solid var(--action); border-radius: var(--radius);
  padding: .1rem .35rem; font-variant-numeric: tabular-nums;
}
.pc-dim-input:focus { outline: none; }
.pc-hint {
  position: absolute; z-index: 2; top: 1rem; left: 1rem; max-width: min(30rem, calc(100% - 2rem));
  padding: .75rem 1rem; font-size: .875rem; background: var(--sheet-2);
  border: var(--pen-2) solid var(--ink); border-radius: var(--radius); pointer-events: none;
}
.pc-hint-h { margin: 0 0 .35rem; font-weight: 700; font-stretch: 112%; }
.pc-hint ol { margin: 0; padding-left: 1.2rem; }
.pc-hint li + li { margin-top: .2rem; }
.pc-drop, .pc-busy {
  position: absolute; inset: .75rem; z-index: 6; display: grid; place-items: center; font-weight: 700;
  background: color-mix(in srgb, var(--sheet) 85%, transparent);
  border: var(--pen-3) dashed var(--action); border-radius: var(--radius);
}
.pc-busy { border-style: solid; border-color: var(--line); }
.pc-sketch-bar {
  position: absolute; z-index: 3; left: .75rem; bottom: .75rem; display: flex; align-items: center; gap: .5rem;
  padding: .3rem .6rem; font-size: .8125rem; background: var(--sheet-2); border: var(--pen-1) solid var(--line); border-radius: var(--radius);
  max-width: calc(100% - 1.5rem);
}
.pc-sketch-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pc-chip { display: inline-block; padding: .05rem .45rem; font-size: .8125rem; font-weight: 700; border: var(--pen-1) solid var(--line); border-radius: var(--radius); white-space: nowrap; }
.pc-chip:empty { display: none; }
.pc-chip.is-full { color: var(--ink); border-color: var(--ink); }
.pc-chip.is-under { color: var(--layer-blue); border-color: var(--layer-blue); }
.pc-chip.is-over, .pc-chip.is-error { color: var(--layer-red); border-color: var(--layer-red); }
.pc-chip.is-ok { color: var(--layer-green); border-color: var(--layer-green); }

/* ---- Drawing sheet (sheetview.js) ---- */
.pc-sheet { position: absolute; inset: 0; z-index: 4; background: var(--sheet); }
.pc-sheet[hidden] { display: none; }
.pc-sheet-svg { display: block; width: 100%; height: 100%; touch-action: none; cursor: crosshair; }
.pc-sheet-svg:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: -3px; }
/* paper stays white with black ink in both themes: it is what the PDF will look like */
.pc-sheet-paper { fill: #ffffff; stroke: var(--line); stroke-width: .3; }
.pc-sheet-ink { fill: none; stroke: #111111; stroke-linecap: round; stroke-linejoin: round; }
.pc-sheet-fill { fill: #111111; stroke: none; }
.pc-sheet-text { fill: #111111; font-family: Helvetica, Arial, sans-serif; }
.pc-sheet-text.is-bold { font-weight: 700; }
.pc-sheet-note { fill: transparent; stroke: transparent; stroke-width: .35; cursor: move; }
.pc-sheet-note.is-hover { stroke: var(--layer-cyan); }
.pc-sheet-note.is-selected { stroke: var(--layer-orange); stroke-width: .5; fill: color-mix(in srgb, var(--layer-orange) 10%, transparent); }
.pc-chip.is-busy { color: var(--ink-2); }

/* ---- Status bar ---- */
.pc-status { grid-area: status; display: flex; align-items: center; gap: 1rem; padding: .25rem 1rem; font-size: .8125rem; background: var(--sheet-2); border-top: var(--pen-2) solid var(--ink); min-width: 0; }
.pc-coords { font-variant-numeric: tabular-nums; font-weight: 600; min-width: 10rem; }
.pc-status-msg { color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; flex: 1 1 auto; }

/* in-page dialog (ask) */
.pc-dialog { width: min(30rem, calc(100vw - 2rem)); padding: 0; color: var(--ink); background: var(--sheet-2); border: var(--pen-2) solid var(--ink); border-radius: var(--radius); }
.pc-dialog::backdrop { background: color-mix(in srgb, var(--ink) 35%, transparent); }
.pc-dialog-head, .pc-dialog-foot { display: flex; align-items: center; gap: .6rem; padding: .65rem 1rem; }
.pc-dialog-head { border-bottom: var(--pen-1) solid var(--line); }
.pc-dialog-head .pc-h { margin: 0; }
.pc-dialog-foot { justify-content: flex-end; flex-wrap: wrap; border-top: var(--pen-1) solid var(--line); }
.pc-dialog-text { margin: 0; padding: 1rem; }

@media (max-width: 1100px) {
  .pc { grid-template-columns: 13.5rem minmax(0, 1fr) 16rem; }
}
@media (max-width: 760px) {
  body.app-shell .sp-tab { bottom: .75rem; }
  .pc-tools { flex-wrap: nowrap; overflow-x: auto; }
  .pc-menu-list { position: fixed; top: auto; left: 1rem; right: 1rem; }
  .pc {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto 60vh auto auto auto;
    grid-template-areas: "tools" "stage" "status" "right" "left";
    height: auto;
  }
  .pc-left, .pc-right { border: 0; border-top: var(--pen-2) solid var(--ink); }
  .pc-status { flex-wrap: wrap; gap: .5rem; }
  .pc-coords { min-width: 0; }
  .pc-hint { font-size: .8125rem; }
}

/* ---- Edit › More menu: shortcuts on the right, separators ---- */
.pc-menu-list button kbd { margin-left: 1.25rem; float: right; font: inherit; font-size: .75rem; color: var(--ink-2); background: none; border: 0; padding: 0; }
.pc-menu-list hr { margin: .25rem 0; border: 0; border-top: var(--pen-1) solid var(--line); opacity: 1; }
[data-edit-menu] .pc-menu-list { min-width: 15rem; }

/* ---- Workspaces (workspaces.js): the switcher, an empty group, the "being built" panel ---- */
.pc-ws-select { width: auto; font-size: .8125rem; font-weight: 600; align-self: center; margin-top: .2rem; padding: .2rem .1rem .2rem .3rem; }
.pc-tool-empty { align-self: center; font-size: .75rem; font-weight: 500; color: var(--ink-2); padding: .5rem .35rem; white-space: nowrap; }
.pc-ws-placeholder p { margin: 0 0 .5rem; }
.pc-ws-placeholder p:first-child { font-size: .9375rem; font-weight: 600; }

/* Measure card (measure-ui.js) and the assembly BOM table (asm-ui.js) */
.pc-measure { position: absolute; top: .75rem; left: .75rem; z-index: 5; width: min(24rem, calc(100% - 1.5rem)); max-height: calc(100% - 1.5rem); overflow-y: auto; padding: .6rem .75rem; background: var(--sheet-2); border: var(--pen-2) solid var(--ink); border-radius: var(--radius); font-size: .875rem; }
.pc-measure-head { display: flex; align-items: center; justify-content: space-between; gap: .5rem; }
.pc-measure-dl { margin: .4rem 0 0; }
.pc-measure-dl dd { font-variant-numeric: tabular-nums; overflow-wrap: anywhere; user-select: text; }
.pc-measure-mat { display: flex; align-items: center; gap: .5rem; margin: .5rem 0 0; color: var(--ink-2); font-weight: 500; }
.pc-measure-mat .pc-select { flex: 1 1 auto; min-width: 0; }
.pc-measure .pc-actions { margin-top: .5rem; }
.pc-btn-sm { padding: .15rem .45rem; font-size: .8125rem; }
.pc-bom { width: 100%; border-collapse: collapse; font-size: .8125rem; margin: .35rem 0 0; font-variant-numeric: tabular-nums; }
.pc-bom th, .pc-bom td { text-align: left; padding: .2rem .25rem; border-top: var(--pen-1) solid var(--grid); vertical-align: top; overflow-wrap: anywhere; }
.pc-bom th { color: var(--ink-2); font-weight: 600; border-top: 0; }
.pc-range-end { text-align: right; color: var(--ink-2); }

/* parameters (params-panel.js): right-panel tabs, driven fields, variables table, equations, design table, rollback buttons */
.pc-tabs { display: flex; gap: 0; border-bottom: var(--pen-1) solid var(--grid); position: sticky; top: 0; background: var(--sheet-2); z-index: 1; }
.pc-tab { flex: 1 1 0; padding: .45rem .5rem; font: inherit; font-size: .875rem; font-weight: 600; color: var(--ink-2); background: none; border: 0; border-bottom: var(--pen-3) solid transparent; cursor: pointer; }
.pc-tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--action); }
.pc-tab:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: -2px; }
.pc-roll { display: inline-flex; gap: .2rem; flex: none; }
.pc-roll .pc-btn { padding: .1rem .35rem; line-height: 1.2; }
.pc-input.is-driven { border-color: var(--layer-violet); }
.pc-fx { display: inline-block; vertical-align: middle; width: 1.4rem; height: 1.4rem; margin-left: .2rem; padding: 0; font: italic 700 .95rem/1 Georgia, 'Times New Roman', serif; color: var(--layer-violet); background: var(--sheet); border: var(--pen-1) solid var(--layer-violet); border-radius: var(--radius); cursor: pointer; }
.pc-fx:hover { color: var(--on-action); background: var(--layer-violet); }
.pc-fx:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: 1px; }
.pc-ptable { width: 100%; border-collapse: collapse; font-size: .8125rem; table-layout: fixed; }
.pc-ptable th { text-align: left; color: var(--ink-2); font-weight: 600; padding: 0 .2rem .2rem 0; }
.pc-ptable th:nth-child(1) { width: 24%; } .pc-ptable th:nth-child(2) { width: 30%; } .pc-ptable th:nth-child(3) { width: 18%; } .pc-ptable th:nth-child(5) { width: 2rem; }
.pc-ptable td { padding: .15rem .2rem .15rem 0; vertical-align: top; }
.pc-ptable .pc-input { width: 100%; padding: .2rem .3rem; font-size: .8125rem; }
.pc-ptable tr.is-error .pc-pval { border-color: var(--layer-red); }
.pc-perr { color: var(--layer-red); font-size: .75rem; margin-top: .15rem; overflow-wrap: anywhere; }
.pc-peqs, .pc-prows { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; }
.pc-peq { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .2rem .4rem; align-items: center; font-size: .8125rem; }
.pc-peq-label { grid-column: 1 / -1; color: var(--ink-2); font-weight: 600; overflow-wrap: anywhere; }
.pc-peq-eq { display: none; }
.pc-peq .pc-input { padding: .2rem .3rem; font-size: .8125rem; }
.pc-peq-val { font-variant-numeric: tabular-nums; color: var(--ink-2); }
.pc-peq .pc-btn { grid-column: 2; grid-row: 2; }
.pc-peq .pc-input { grid-column: 1; grid-row: 2; }
.pc-peq .pc-peq-val { grid-column: 1; }
.pc-peq.is-error .pc-input { border-color: var(--layer-red); }
.pc-peq .pc-perr { grid-column: 1 / -1; }
.pc-prow { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .1rem .4rem; align-items: center; font-size: .8125rem; }
.pc-prow-name { font-weight: 600; overflow-wrap: anywhere; }
.pc-prow-vals { grid-column: 1; font-size: .75rem; overflow-wrap: anywhere; margin: 0; }
.pc-prow .pc-btn { grid-column: 2; grid-row: 1 / span 2; }
/* Simulation / Generative (ws-simulation.js, ws-generative.js, sim-ui.js) */
.pc-sim-legend { margin-top: .6rem; }
.pc-sim-bar { height: .7rem; border-radius: 2px; border: var(--pen-1) solid var(--line); margin-top: .3rem; }
.pc-sim-ticks { display: flex; justify-content: space-between; font-size: .75rem; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.pc-sim-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.pc-props .pc-sim-grid .pc-check { grid-column: auto; }
.pc-sim-scroll { overflow-x: auto; }
.pc-sim-table { width: 100%; border-collapse: collapse; font-size: .8125rem; font-variant-numeric: tabular-nums; }
.pc-sim-table th { text-align: left; font-weight: 600; color: var(--ink-2); padding: .2rem .3rem; border-bottom: var(--pen-1) solid var(--line); }
.pc-sim-table td { padding: .2rem .3rem; border-top: var(--pen-1) solid var(--grid); }
.pc-sim-table tr.is-sel td { background: var(--sheet); font-weight: 700; }
.pc-sim-table .is-bad, .pc-props .is-bad { color: var(--layer-red); font-weight: 700; }