/* laminate-stacking: topic-scoped styles. Colours come from CourseWiki tokens;
   the four ply colours use the official palette and swap navy for ink in dark. */
[data-interactive="laminate-stacking"] {
  min-width: 0; margin-block: 1rem;
  --ls-p0: var(--msu-navy); --ls-p0-fiber: #FFFFFF;
  --ls-p90: var(--msu-gold); --ls-p90-fiber: var(--msu-navy);
  --ls-p45: var(--msu-redorange); --ls-p45-fiber: #FFFFFF;
  --ls-m45: var(--msu-liteblue); --ls-m45-fiber: var(--msu-navy);
  --ls-free: var(--msu-redorange);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) [data-interactive="laminate-stacking"] { --ls-p0: var(--ink); --ls-p0-fiber: var(--msu-navy); }
}
:root[data-theme="dark"] [data-interactive="laminate-stacking"] { --ls-p0: var(--ink); --ls-p0-fiber: var(--msu-navy); }
[data-interactive="laminate-stacking"] * { box-sizing: border-box; }

/* ---- shared SVG drawing (live and static) ---- */
.ls-svg { display: block; width: 100%; height: auto; }
.ls-t { font-family: var(--f-display); font-size: 17px; fill: var(--ink); }
.ls-small { font-size: 18px; fill: var(--ink-soft); }
.ls-panel .ls-small { font-size: 16px; }
.ls-rose .ls-small { font-size: 16px; }
.ls-rose-compact .ls-small { font-size: 20px; }
.ls-caps { letter-spacing: .08em; font-weight: 700; }
.ls-head { font-weight: 700; letter-spacing: .06em; font-size: 17px; }
.ls-plylabel { font-family: var(--f-mono); font-size: 18px; font-weight: 700; }
.ls-ply { stroke: var(--ink); stroke-width: 1; stroke-opacity: .55; }
.ls-ply-edge { stroke: var(--ink); stroke-width: .8; stroke-opacity: .45; fill-opacity: .7; }
.ls-p0 { fill: var(--ls-p0); } .ls-p90 { fill: var(--ls-p90); } .ls-p45 { fill: var(--ls-p45); } .ls-m45 { fill: var(--ls-m45); } .ls-px { fill: var(--surface-2); }
.ls-fiber { fill: none; stroke-width: 1.6; stroke-linecap: round; opacity: .9; }
.ls-fiber-p0 { stroke: var(--ls-p0-fiber); } .ls-fiber-p90 { stroke: var(--ls-p90-fiber); }
.ls-fiber-p45 { stroke: var(--ls-p45-fiber); } .ls-fiber-m45 { stroke: var(--ls-m45-fiber); } .ls-fiber-px { stroke: var(--ink); }
.ls-leader { fill: none; stroke: var(--ink-soft); stroke-width: 1; stroke-dasharray: 2 3; }
.ls-mid { fill: none; stroke: var(--ink); stroke-width: 1.5; stroke-dasharray: 8 5; }
.ls-axis { fill: none; stroke: var(--ink); stroke-width: 1.6; }
.ls-ring { fill: none; stroke: var(--rule); stroke-width: 1; }
.ls-ring-outer { stroke: var(--ink-soft); }
.ls-spoke { fill: none; stroke: var(--rule); stroke-width: 1; }
.ls-rose .ls-ring-label { font-size: 15px; paint-order: stroke; stroke: var(--paper); stroke-width: 4px; stroke-linejoin: round; }
.ls-curve { fill: none; stroke-linejoin: round; }
.ls-curve-flat { fill: var(--accent); fill-opacity: .16; stroke: var(--accent); stroke-width: 3; }
.ls-curve-free { stroke: var(--ls-free); stroke-width: 2.5; stroke-dasharray: 7 5; }
.ls-curve-ply { stroke: var(--ink-soft); stroke-width: 1.8; stroke-dasharray: 2 4; stroke-linecap: round; }
.ls-flat { fill: none; stroke: var(--ink-soft); stroke-width: 1.4; stroke-dasharray: 6 5; }
.ls-flat-front { stroke-opacity: .6; }
.ls-face { fill: var(--accent); stroke: var(--ink); stroke-opacity: .28; stroke-width: .6; stroke-linejoin: round; }
.ls-load { fill: none; stroke: var(--ink); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.ls-shear { stroke-dasharray: none; }

/* ---- static fallback ---- */
.ls-static { display: grid; gap: 1rem; }
.ls-static-figure { margin: 0; }
.ls-static-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.ls-static-pair > div { min-width: 0; border: 1px solid var(--rule); background: var(--paper); padding: .3rem; }
.ls-static-figure figcaption { font-size: .92rem; color: var(--ink-soft); margin-top: .45rem; }

/* ---- live lab ---- */
.ls-live > .ls-static { display: none; }
.ls-lab { font-family: var(--f-display); font-size: .94rem; line-height: 1.4; display: grid; gap: .9rem; }
.ls-start { display: flex; align-items: baseline; flex-wrap: wrap; gap: .35rem .7rem; }
.ls-start strong { font-size: 1.05rem; }
.ls-start > span:last-child { color: var(--ink-soft); }
.ls-kicker { font-size: .7rem; font-weight: 700; letter-spacing: .09em; padding: .22rem .45rem; background: var(--flag); color: var(--msu-navy); }
.ls-bench { display: grid; grid-template-columns: minmax(0, 1fr); gap: .7rem; align-items: start; }
.ls-bench > * { min-width: 0; }
.ls-ctrl { display: grid; gap: .5rem; }
.ls-plylist, .ls-explain { display: grid; gap: .45rem; }
.ls-feedback.ls-status { margin: 0; min-height: calc(2 * 1.4em + .7rem); line-height: 1.4; padding: .35rem .55rem; border-left: 3px solid var(--accent); background: var(--surface); font-size: .84rem; }
.ls-rosebox .ls-rose { max-width: 22rem; margin-inline: auto; }
@media (max-width: 46rem) { .ls-rosebox .ls-rose { max-width: 14rem; } .ls-rosebox .ls-rose .ls-small { font-size: 22px; } .ls-rosebox .ls-rose .ls-ring-label { font-size: 21px; } .ls-lab .ls-ctrl h3 { font-size: .72rem; } }
.ls-left { display: flex; flex-direction: column; gap: .6rem; min-width: 0; }
@media (min-width: 46.01rem) {
  .ls-bench { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-areas: "left rose" "left explain"; }
  .ls-rosebox { grid-area: rose; } .ls-left { grid-area: left; } .ls-explain { grid-area: explain; }
}
.ls-box { border: 1px solid var(--rule); border-radius: var(--radius-sm); background: var(--paper); overflow: hidden; min-width: 0; }
.ls-box > .ls-svg { padding: .2rem; }
.ls-lab h3 { margin: 0; font-size: .8rem; }
.ls-group { display: flex; flex-wrap: wrap; gap: .35rem; align-items: center; }
.ls-lab button, .ls-lab select { font: inherit; font-size: .85rem; color: var(--ink); background: var(--surface); border: 1px solid var(--rule); border-radius: var(--radius-xs); min-height: 44px; min-width: 44px; padding: .4rem .6rem; cursor: pointer; }
.ls-lab button:hover:not(:disabled) { background: var(--surface-2); }
.ls-lab button:disabled { opacity: .45; cursor: default; }
.ls-lab :is(button, select, input, summary, li):focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.ls-palette { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ls-add { font-weight: 700; justify-content: center; display: inline-flex; align-items: center; gap: .35rem; }
.ls-chip { display: inline-block; width: .95rem; height: .95rem; border: 1px solid var(--ink-soft); flex: none; }
.ls-chip.ls-p0 { background: var(--ls-p0); } .ls-chip.ls-p90 { background: var(--ls-p90); } .ls-chip.ls-p45 { background: var(--ls-p45); } .ls-chip.ls-m45 { background: var(--ls-m45); }
.ls-presets { display: flex; flex-wrap: wrap; gap: .35rem; align-items: center; }
.ls-presets label { font-weight: 700; font-size: .82rem; }
.ls-presets select { flex: 1 1 10rem; max-width: 100%; }
.ls-plies { list-style: none; margin: 0; padding: 0; display: grid; gap: .25rem; counter-reset: ply; }
.ls-plies li { display: grid; grid-template-columns: 44px minmax(0, 1fr) 44px 44px 44px; align-items: center; gap: .25rem; border: 1px solid var(--rule); border-radius: var(--radius-xs); background: var(--surface); padding: 0 .15rem 0 0; touch-action: auto; }
.ls-plies li.ls-dragging { opacity: .85; box-shadow: 0 0 0 2px var(--accent); position: relative; z-index: 1; }
.ls-plies li.ls-moved { box-shadow: inset 4px 0 0 var(--flag); }
.ls-handle { cursor: grab; touch-action: none; display: grid; place-items: center; min-height: 44px; color: var(--ink-soft); font-size: 1.1rem; user-select: none; }
.ls-handle:active { cursor: grabbing; }
.ls-plyname { display: flex; align-items: center; gap: .45rem; font-family: var(--f-mono); font-size: .85rem; min-width: 0; }
.ls-plyname small { color: var(--ink-soft); font-family: var(--f-display); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ls-plies button { padding: 0; font-size: 1rem; }
.ls-hint, .ls-note { font-size: .78rem; color: var(--ink-soft); margin: 0; }
.ls-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 0 .6rem; padding: 0 .4rem; font-size: .76rem; color: var(--ink-soft); }
.ls-legend span { display: inline-flex; align-items: center; gap: .35rem; }
.ls-legend span[hidden] { display: inline-flex; visibility: hidden; } /* keep the legend height stable so controls below never shift */
.ls-legend i { display: inline-block; width: 1.4rem; height: 0; border-top: 3px solid var(--accent); }
.ls-legend i.ls-k-free { border-top: 3px dashed var(--ls-free); }
.ls-legend i.ls-k-ply { border-top: 2px dotted var(--ink-soft); }
.ls-toggle { display: inline-flex; align-items: center; gap: .4rem; min-height: 44px; cursor: pointer; }
.ls-toggle input { width: 1.2rem; height: 1.2rem; accent-color: var(--accent); }
.ls-rosebox { display: flex; flex-direction: column; }
.ls-read { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--rule); order: 3; }
.ls-rosebox .ls-legend { order: 2; }
@media (min-width: 46.01rem) { .ls-read { order: 0; border-top: 0; border-bottom: 1px solid var(--rule); } }
.ls-read > div { padding: .45rem .6rem; display: grid; gap: .1rem; min-width: 0; }
.ls-read > div + div { border-left: 1px solid var(--rule); }
.ls-read span { color: var(--ink-soft); font-size: .72rem; }
.ls-read strong { color: var(--accent); font-size: 1.05rem; overflow-wrap: anywhere; }
.ls-badges { display: grid; gap: .35rem; }
.ls-badge { display: grid; grid-template-columns: 6.6rem minmax(0, 1fr); gap: .5rem; align-items: baseline; padding: .4rem .6rem; border: 1px solid var(--rule); border-left: 4px solid var(--rule); border-radius: var(--radius-xs); background: var(--surface); font-size: .82rem; }
.ls-badge[data-on="true"] { border-left-color: var(--accent); }
.ls-badge b { font-size: .8rem; }
.ls-badge b::after { content: " \2014  no"; font-weight: 400; color: var(--ink-soft); }
.ls-badge[data-on="true"] b::after { content: " \2014  yes"; color: var(--ink); font-weight: 700; }
.ls-predict { border: 1px solid var(--rule); border-left: 4px solid var(--flag); border-radius: var(--radius-xs); padding: .65rem .8rem; display: grid; gap: .55rem; }
.ls-predict fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
.ls-predict legend { padding: 0; font-weight: 700; margin-bottom: .35rem; }
.ls-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .35rem; }
.ls-option { display: flex; align-items: center; gap: .45rem; border: 1px solid var(--rule); border-radius: var(--radius-xs); min-height: 44px; padding: .35rem .55rem; cursor: pointer; font-family: var(--f-mono); font-size: .85rem; background: var(--surface); }
.ls-option:has(input:checked) { border-color: var(--accent); background: var(--cat1-soft); }
.ls-option input { width: 1.15rem; height: 1.15rem; accent-color: var(--accent); margin: 0; }
.ls-option[data-result="right"] { box-shadow: inset 4px 0 0 var(--accent); }
.ls-option[data-result="wrong"] { box-shadow: inset 4px 0 0 var(--msu-redorange); }
.ls-option em { font-style: normal; font-family: var(--f-display); font-size: .74rem; color: var(--ink-soft); margin-left: auto; text-align: right; }
.ls-check { background: var(--band) !important; color: var(--band-ink) !important; border-color: var(--band) !important; font-weight: 700; justify-self: start; }
.ls-lab .ls-check:disabled { opacity: .72; }
.ls-feedback { margin: 0; font-size: .86rem; min-height: 1.4em; }
.ls-multiples { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .4rem; }
.ls-multiples figure { margin: 0; border: 1px solid var(--rule); background: var(--paper); padding: .2rem; min-width: 0; }
.ls-multiples figcaption { font-family: var(--f-mono); font-size: .74rem; text-align: center; padding-bottom: .2rem; }
.ls-pull { border: 1px solid var(--rule); border-radius: var(--radius-sm); padding: .7rem .8rem; display: grid; gap: .6rem; }
.ls-pull > h3 { font-size: .95rem; text-transform: none; letter-spacing: 0; color: var(--ink); }
.ls-sliders { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .3rem .8rem; align-items: end; }
.ls-slider label { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 0 .4rem; font-weight: 700; font-size: .9rem; }
.ls-slider label small { font-weight: 400; color: var(--ink-soft); font-size: .74rem; }
.ls-slider output { font-family: var(--f-mono); color: var(--accent); white-space: nowrap; }
.ls-slider input[type="range"] { display: block; width: 100%; min-height: 44px; margin: 0; accent-color: var(--accent); cursor: pointer; }
.ls-panels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem; }
.ls-panelbox { margin: 0; }
.ls-panelbox figcaption { padding: .4rem .55rem 0; font-size: .82rem; line-height: 1.3; }
.ls-panelbox figcaption b { text-transform: uppercase; letter-spacing: .06em; font-size: .74rem; }
.ls-panelbox figcaption span { font-family: var(--f-mono); font-size: .78rem; overflow-wrap: anywhere; }
.ls-panelbox .ls-sum { display: block; color: var(--accent); font-size: .86rem; line-height: 1.3; padding: 0 .55rem .45rem; min-height: 2.6em; }
.ls-panels .ls-svg { max-width: 17rem; margin-inline: auto; }
.ls-readouts { display: grid; gap: .2rem; font-size: .76rem; color: var(--ink-soft); }
.ls-readouts p { margin: 0; overflow-wrap: anywhere; }
.ls-readouts b { color: var(--ink); }
.ls-trybar > span { font-weight: 700; font-size: .84rem; }
.ls-panels .ls-box p { margin: 0; padding: .3rem .55rem .45rem; font-size: .74rem; color: var(--ink-soft); border-top: 1px solid var(--rule); overflow-wrap: anywhere; }
.ls-panelcap { font-weight: 700; color: var(--ink); }
.ls-validity { font-size: .8rem; padding: .5rem .6rem; border-left: 3px solid var(--cat2); background: var(--cat2-soft); margin: 0; }
.ls-boundary { font-size: .76rem; color: var(--ink-soft); margin: 0; }

/* presentation mode: the card is a full panel; keep controls in normal flow */
.presenting .xcard:has(.ls-lab) { justify-content: flex-start; }
.presenting .ls-lab { max-width: 80rem; margin-inline: auto; width: 100%; }

@media (max-width: 46rem) {
  .ls-multiples { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ls-static-pair { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 30rem) {
  .xcard:has([data-interactive="laminate-stacking"]) .body { padding-inline: .5rem; }
  .ls-options { grid-template-columns: minmax(0, 1fr); }
  .ls-t { font-size: 19px; } .ls-small, .ls-panel .ls-small, .ls-rose .ls-small { font-size: 18px; } .ls-plylabel { font-size: 18px; } .ls-head { font-size: 18px; }
  .ls-rose-compact .ls-small { font-size: 20px; }
  .ls-read strong { font-size: .92rem; }
  .ls-read > div { padding: .4rem .45rem; }
  .ls-badge { grid-template-columns: minmax(0, 1fr); gap: .1rem; }
}
@media (prefers-reduced-motion: reduce) { [data-interactive="laminate-stacking"] * { transition: none !important; animation: none !important; } }
@media print {
  /* The mount is taller than a page: let it flow, and keep each figure and the table whole. */
  [data-interactive="laminate-stacking"] { break-inside: auto !important; }
  .ls-static .unit-table-wrap { break-inside: avoid; }
  [data-interactive="laminate-stacking"] .ls-lab { display: none !important; }
  [data-interactive="laminate-stacking"] > .ls-static { display: grid !important; }
  .ls-static-figure { break-inside: avoid; }
  .ls-static-pair > div { break-inside: avoid; }
  .ls-svg { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
}