:root { --con-ink:#102131; --con-blue:#149bd7; --con-dark:#073047; --con-line:#c9dbe6; --con-muted:#526c7a; --con-green:#157347; --con-red:#b4232f; }
* { box-sizing:border-box; }
html,body { min-height:100%; }
body { margin:0; overflow:hidden; color:var(--con-ink); background:#edf5f9; font-family:Arial,Helvetica,sans-serif; }
button,input,select,summary { font:inherit; }
.app { height:100dvh; min-height:100vh; display:grid; grid-template-rows:auto minmax(0,1fr); overflow:hidden; }
.topbar { min-height:72px; display:grid; grid-template-columns:minmax(240px,1fr) auto; align-items:center; gap:16px; padding:11px 18px; color:#fff; background:#071018; }
.brand { min-width:0; display:flex; align-items:center; gap:14px; }
.brand-logo { display:inline-flex; border-radius:6px; }
.brand h1 { margin:0; color:#fff; font-size:clamp(1.35rem,2vw,2rem); line-height:1.05; }
.top-actions { display:flex; align-items:center; justify-content:flex-end; gap:8px; }
.icon-button,.home-button { min-width:48px; min-height:48px; border:2px solid #263d51; border-radius:8px; color:#fff; background:#122436; cursor:pointer; }
.icon-button { display:inline-grid; place-items:center; padding:0; }
.icon-button:hover,.icon-button:focus-visible,.home-button:hover,.home-button:focus-visible { border-color:#8fd8f3; color:#06111a; background:var(--con-blue); }
.icon { width:24px; height:24px; display:block; pointer-events:none; }
.home-button { display:inline-flex; align-items:center; justify-content:center; padding:0 14px; font-weight:800; text-decoration:none; }
.con-tool { height:100%; min-height:0; display:grid; grid-template-rows:auto minmax(0,1fr); overflow:hidden; color:var(--con-ink); background:#edf5f9; }
.con-toolbar { min-height:68px; display:flex; align-items:center; padding:10px 16px; border-bottom:1px solid var(--con-line); background:#fff; }
.con-toolbar-group { width:100%; display:flex; align-items:center; gap:10px; }
.con-button { min-height:48px; padding:0 14px; border:1px solid #9fb8c8; border-radius:8px; color:var(--con-ink); background:#fff; font-weight:800; cursor:pointer; }
.con-button:hover,.con-button:focus-visible { border-color:#006b99; box-shadow:0 0 0 3px rgba(20,155,215,.18); outline:0; }
.con-button.con-primary { border-color:#087eaf; color:#fff; background:var(--con-blue); }
.con-button:disabled { opacity:.45; cursor:not-allowed; }
.con-small { min-height:42px; padding:0 10px; }
.con-settings,.con-model-controls { position:relative; }
.con-settings { margin-left:auto; }
.con-settings > summary,.con-model-controls > summary { min-height:48px; display:flex; align-items:center; padding:0 16px; border:1px solid #7f9aa9; border-radius:8px; color:#073047; background:#fff; font-weight:900; cursor:pointer; list-style:none; }
.con-settings > summary::-webkit-details-marker,.con-model-controls > summary::-webkit-details-marker { display:none; }
.con-settings > summary::after,.con-model-controls > summary::after { content:"▾"; margin-left:10px; }
.con-settings[open] > summary,.con-model-controls[open] > summary { color:#fff; border-color:#006b99; background:#087eaf; }
.con-model-controls-panel { position:absolute; z-index:21; top:56px; left:0; width:300px; display:grid; gap:8px; margin:0; padding:14px; border:1px solid #8eabb9; border-radius:10px; background:#fff; box-shadow:0 18px 50px rgba(7,32,48,.26); }
.con-model-controls-panel label { min-height:44px; display:flex; align-items:center; gap:10px; color:#073047; font-weight:900; }
.con-model-controls-panel input { width:22px; height:22px; accent-color:#087eaf; }
.con-model-controls-panel label:has(input:disabled) { color:#6f7f88; }
.con-model-note { margin:0; padding:9px; border-radius:7px; color:#5b465f; background:#f7f0ff; font-size:.8rem; font-weight:800; line-height:1.3; }
.con-settings-panel { position:absolute; z-index:20; top:56px; right:0; width:min(760px,calc(100vw - 32px)); max-height:calc(100vh - 170px); overflow:auto; padding:16px; border:1px solid #8eabb9; border-radius:10px; background:#fff; box-shadow:0 18px 50px rgba(7,32,48,.26); }
.con-settings-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; }
.con-settings-cards { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; margin-top:12px; }
.con-setting-card { min-width:0; display:grid; grid-template-columns:1fr 1fr; gap:8px; padding:10px; border:1px solid var(--con-line); border-radius:8px; background:#f6fafc; }
.con-setting-card > strong { grid-column:1 / -1; }
.con-field { min-width:0; display:grid; gap:5px; color:var(--con-muted); font-size:.82rem; font-weight:800; }
.con-field input,.con-field select { width:100%; min-width:0; min-height:46px; padding:8px 10px; border:1px solid #9fb8c8; border-radius:8px; color:var(--con-ink); background:#fff; font-weight:800; }
.con-field input:focus-visible,.con-field select:focus-visible { outline:3px solid rgba(20,155,215,.32); outline-offset:2px; }
.con-setting-actions { display:flex; align-items:center; flex-wrap:wrap; gap:7px; margin-top:12px; padding-top:12px; border-top:1px solid var(--con-line); }
.con-setting-actions > span { margin-right:2px; color:var(--con-muted); font-size:.82rem; font-weight:900; }
.con-setting-actions #conReset { margin-left:auto; }
.con-visually-hidden { position:absolute!important; width:1px!important; height:1px!important; margin:-1px!important; padding:0!important; overflow:hidden!important; clip:rect(0,0,0,0)!important; white-space:nowrap!important; border:0!important; }
.con-workspace { min-width:0; min-height:0; height:100%; display:grid; grid-template-columns:minmax(290px,350px) minmax(0,1fr); gap:14px; overflow:hidden; padding:14px; }
.con-pupil-panel,.con-model-panel { min-width:0; border:1px solid var(--con-line); border-radius:12px; background:#fff; box-shadow:0 8px 22px rgba(7,32,48,.07); }
.con-pupil-panel { padding:14px; }
.con-left-panel { min-height:0; height:100%; display:flex; flex-direction:column; overflow:hidden; }
.con-response-panel { flex:0 0 auto; margin-top:auto; padding-top:10px; border-top:1px solid var(--con-line); }
.con-model-panel { min-height:0; height:100%; display:grid; overflow:hidden; padding:14px; }
.con-prompt { margin-bottom:12px; padding:14px; border-radius:9px; color:#fff; background:var(--con-dark); }
.con-kicker { display:block; margin-bottom:4px; color:#9ee4ff; font-size:.76rem; font-weight:900; letter-spacing:.06em; text-transform:uppercase; }
.con-prompt h2 { margin:0 0 6px; color:#fff; font-size:clamp(1.2rem,2vw,1.5rem); }
.con-prompt p { margin:0; color:#e5f6fb; line-height:1.4; }
.con-inline-sign { width:72px; min-height:58px; display:grid; place-items:center; margin:0 auto 10px; border:2px solid #087eaf; border-radius:10px; color:#512878; background:#fff; font-size:1.8rem; font-weight:900; cursor:pointer; }
.con-inline-sign:hover,.con-inline-sign:focus-visible { box-shadow:0 0 0 4px rgba(20,155,215,.24); outline:0; }
.con-actions { display:flex; flex-wrap:wrap; gap:8px; margin-top:14px; }
.con-feedback { min-height:54px; display:flex; align-items:center; margin:10px 0 0; padding:10px 12px; border-left:5px solid #6f8794; border-radius:7px; background:#f2f7fa; font-weight:800; line-height:1.35; }
.con-feedback:empty { display:none; }
.con-feedback[data-tone="success"] { border-left-color:var(--con-green); color:#0b5934; background:#eef9f3; }
.con-feedback[data-tone="error"] { border-left-color:var(--con-red); color:#81202a; background:#fff2f3; }
.con-feedback[data-tone="hint"] { border-left-color:#7d43b5; color:#512878; background:#f7f0ff; }
.con-feedback.is-announcement-only { position:absolute; width:1px; height:1px; min-height:0; margin:-1px; padding:0; overflow:hidden; clip:rect(0,0,0,0); border:0; white-space:nowrap; }
.con-reveal-answer { margin-top:10px; padding:11px; border-radius:8px; color:#0b5934; background:#eef9f3; font-weight:900; }
.con-model-stack { min-height:0; height:100%; display:grid; grid-template-rows:minmax(0,1fr); gap:10px; transform:scale(var(--con-view-scale)); transform-origin:center top; }
.con-model-stack.is-count-2 { grid-template-rows:minmax(0,1.15fr) minmax(0,.85fr); }
.con-model-stack.is-count-3 { grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:repeat(2,minmax(0,1fr)); }
.con-model-stack.is-count-3 > .con-model-block:last-child { grid-column:1 / -1; }
.con-model-stack.is-count-4 { grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:repeat(2,minmax(0,1fr)); }
.con-model-stack.is-count-5 { grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:minmax(0,1.35fr) minmax(0,.9fr) minmax(0,1.05fr); }
.con-model-stack.is-count-5 > .con-model-block:last-child { grid-column:1 / -1; }
.con-model-block { min-width:0; min-height:0; display:grid; grid-template-rows:auto auto minmax(0,1fr); padding:10px; border:1px solid var(--con-line); border-radius:9px; background:#fbfdfe; overflow:hidden; }
.con-model-guide { margin:0 0 5px; color:var(--con-muted); font-size:.82rem; font-weight:800; line-height:1.25; }
.con-model-guide span { font-weight:700; }
.con-diagram-host { min-width:0; min-height:0; display:grid; place-items:center; overflow:hidden; }
.con-diagram-host .question-visual { width:100%; max-width:100%; height:100%; min-height:0; display:grid; grid-template-rows:minmax(0,1fr); margin:0; overflow:hidden; }
.con-diagram-host figcaption { position:absolute; width:1px; height:1px; margin:-1px; padding:0; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.con-diagram-host svg { display:block; width:100%; height:100%; max-height:100%; }
.con-sentence-block { grid-template-rows:minmax(0,1fr); }
.con-sentence-block { position:relative; }
.con-sentence-block > .con-model-guide { position:absolute; z-index:1; top:8px; left:10px; right:10px; margin:0; pointer-events:none; }
.con-sentence-block .con-diagram-host { width:100%; height:100%; place-self:center; }
.con-part-whole-block { grid-template-rows:auto minmax(0,1fr); padding:4px; }
.con-part-whole-grid { width:100%; height:100%; grid-template-columns:repeat(auto-fit,minmax(120px,1fr)); grid-auto-rows:minmax(0,1fr); gap:6px; align-items:stretch; justify-items:stretch; }
.con-part-whole-grid.is-card-count-2 { grid-template-columns:repeat(2,minmax(0,1fr)); }
.con-part-whole-grid.is-card-count-3 { grid-template-columns:repeat(3,minmax(0,1fr)); }
.con-part-whole-grid.is-card-count-4 { grid-template-columns:repeat(4,minmax(0,1fr)); }
.con-part-whole-grid.is-card-count-5 { grid-template-columns:repeat(5,minmax(0,1fr)); }
.con-model-stack.is-count-1 .con-part-whole-grid:is(.is-card-count-3,.is-card-count-4,.is-card-count-5) { grid-template-columns:repeat(2,minmax(0,1fr)); }
.con-model-stack.is-count-1 .con-part-whole-grid:is(.is-card-count-3,.is-card-count-5) > .con-part-whole-card:last-child { grid-column:1 / -1; }
.con-part-whole-card { position:relative; width:100%; min-width:0; min-height:0; display:grid; place-items:center; padding:2px; border:1px solid #d5e4ec; border-radius:8px; background:#fff; overflow:hidden; }
.con-part-whole-card-label { position:absolute; z-index:1; top:5px; left:7px; color:#087eaf; font-size:.72rem; font-weight:900; }
.con-part-whole-card .question-visual { width:100%; height:100%; min-height:0; }
.con-part-whole-card svg { width:100%; height:100%; }
.con-special-choice { min-height:48px; margin:5px 0; padding:8px 12px; border:2px solid #9fb8c8; border-radius:8px; color:#073047; background:#fff; font-weight:900; cursor:pointer; }
.con-special-choice:hover,.con-special-choice:focus-visible,.con-special-choice.is-selected { border-color:#087eaf; box-shadow:0 0 0 3px rgba(20,155,215,.18); outline:0; }
.con-special-choice.is-selected { color:#fff; background:#087eaf; }
#conComparisonDiagram [data-place-value-chart-header],
#conCountersDiagram [data-place-value-chart-header],
#conBaseTenDiagram [data-place-value-chart-header] { cursor:pointer; }
#conComparisonDiagram [data-place-value-chart-header]:hover .place-value-chart-header-cell,
#conComparisonDiagram [data-place-value-chart-header]:focus .place-value-chart-header-cell,
#conComparisonDiagram [data-place-value-chart-header][data-selected="true"] .place-value-chart-header-cell,
#conCountersDiagram [data-place-value-chart-header]:hover .place-value-chart-header-cell,
#conCountersDiagram [data-place-value-chart-header]:focus .place-value-chart-header-cell,
#conCountersDiagram [data-place-value-chart-header][data-selected="true"] .place-value-chart-header-cell,
#conBaseTenDiagram [data-place-value-chart-header]:hover .place-value-chart-header-cell,
#conBaseTenDiagram [data-place-value-chart-header]:focus .place-value-chart-header-cell,
#conBaseTenDiagram [data-place-value-chart-header][data-selected="true"] .place-value-chart-header-cell { stroke:#087eaf; stroke-width:3; }
#conComparisonDiagram [data-place-value-chart-header]:focus,
#conCountersDiagram [data-place-value-chart-header]:focus,
#conBaseTenDiagram [data-place-value-chart-header]:focus { outline:none; }
#conSentenceDiagram [data-comparison-operator-index] { cursor:pointer; }
#conSentenceDiagram [data-comparison-operator-index]:hover .comparison-sentence-operator-hit,
#conSentenceDiagram [data-comparison-operator-index]:focus .comparison-sentence-operator-hit { fill:#e8f6fb; stroke:#087eaf; stroke-width:2; }
#conSentenceDiagram [data-comparison-operator-index]:focus { outline:none; }
#conSentenceDiagram [data-comparison-term-index][role="button"],
#conComparisonDiagram [data-place-comparison-row-index][role="button"],
#conCountersDiagram [data-place-value-row-index][role="button"],
#conBaseTenDiagram [data-base-ten-row-index][role="button"],
#conPartWholeDiagram [data-part-whole-card-id][role="button"] { cursor:grab; touch-action:none; }
#conSentenceDiagram [data-comparison-term-index][role="button"]:focus,
#conSentenceDiagram [data-comparison-term-index].is-keyboard-grabbed,
#conSentenceDiagram [data-comparison-term-index].is-drop-target { outline:none; }
#conSentenceDiagram [data-comparison-term-index][role="button"]:focus .comparison-sentence-term,
#conSentenceDiagram [data-comparison-term-index].is-keyboard-grabbed .comparison-sentence-term,
#conSentenceDiagram [data-comparison-term-index].is-drop-target .comparison-sentence-term { fill:#fff3c8; stroke:#087eaf; stroke-width:4; }
#conSentenceDiagram [data-comparison-term-index].is-dragging { opacity:.58; cursor:grabbing; }
#conComparisonDiagram [data-place-comparison-row-index][role="button"]:focus .place-comparison-cell,
#conComparisonDiagram [data-place-comparison-row-index].is-keyboard-grabbed .place-comparison-cell,
#conComparisonDiagram [data-place-comparison-row-index].is-drop-target .place-comparison-cell { stroke:#087eaf; stroke-width:3; }
#conComparisonDiagram [data-place-comparison-row-index].is-dragging { opacity:.58; cursor:grabbing; }
#conCountersDiagram [data-place-value-row-index][role="button"]:focus .place-value-cell,
#conCountersDiagram [data-place-value-row-index].is-keyboard-grabbed .place-value-cell,
#conCountersDiagram [data-place-value-row-index].is-drop-target .place-value-cell,
#conBaseTenDiagram [data-base-ten-row-index][role="button"]:focus .base-ten-cell,
#conBaseTenDiagram [data-base-ten-row-index].is-keyboard-grabbed .base-ten-cell,
#conBaseTenDiagram [data-base-ten-row-index].is-drop-target .base-ten-cell { stroke:#087eaf; stroke-width:3; }
#conCountersDiagram [data-place-value-row-index].is-dragging,
#conBaseTenDiagram [data-base-ten-row-index].is-dragging { opacity:.58; cursor:grabbing; }
#conPartWholeDiagram [data-part-whole-card-id][role="button"]:focus,
#conPartWholeDiagram [data-part-whole-card-id].is-keyboard-grabbed,
#conPartWholeDiagram [data-part-whole-card-id].is-drop-target { border-color:#087eaf; box-shadow:inset 0 0 0 2px #087eaf; outline:none; }
#conPartWholeDiagram [data-part-whole-card-id].is-dragging { opacity:.58; cursor:grabbing; }
.con-instructions { width:min(720px,calc(100vw - 28px)); max-height:calc(100vh - 28px); padding:0; border:0; border-radius:11px; color:var(--con-ink); box-shadow:0 24px 70px rgba(0,0,0,.35); }
.con-instructions::backdrop { background:rgba(4,19,29,.62); }
.con-dialog-header { display:flex; align-items:center; justify-content:space-between; gap:15px; padding:14px 17px; color:#fff; background:#071018; }
.con-dialog-header h2 { margin:0; color:#fff; font-size:1.2rem; }
.con-dialog-body { padding:17px 20px; line-height:1.52; }
.con-dialog-body li { margin-bottom:7px; }
@media (max-height:800px) and (min-width:901px) {
  .con-toolbar { min-height:62px; padding-block:7px; }
  .con-workspace { gap:10px; padding:10px; }
  .con-pupil-panel,.con-model-panel { padding:10px; }
  .con-prompt { margin-bottom:8px; padding:9px 11px; }
  .con-prompt h2 { margin-bottom:3px; font-size:1.12rem; }
  .con-prompt p { font-size:.84rem; line-height:1.2; }
  .con-actions { margin-top:8px; }
  .con-feedback { min-height:46px; margin-top:7px; padding:7px 10px; }
  .con-reveal-answer { margin-top:7px; padding:8px; }
}
@media (max-width:900px) {
  html,body { height:100%; overflow:hidden; }
  .app { height:100dvh; min-height:100vh; display:grid; grid-template-rows:auto minmax(0,1fr); overflow:hidden; }
  .topbar { grid-template-columns:1fr; }
  .top-actions { justify-content:flex-start; flex-wrap:wrap; }
  .con-tool { height:100%; min-height:0; display:grid; grid-template-rows:auto minmax(0,1fr); overflow:hidden; }
  .con-workspace { height:100%; min-height:0; display:grid; grid-template-columns:1fr; grid-template-rows:auto minmax(0,1fr) auto; overflow:hidden; }
  .con-left-panel { display:contents; }
  .con-toolbar { min-height:58px; padding:6px 10px; }
  .con-button,.con-settings > summary,.con-model-controls > summary { min-height:44px; padding-inline:10px; }
  .con-prompt { order:1; margin:0; padding:8px 10px; border:1px solid var(--con-line); border-radius:12px; box-shadow:0 8px 22px rgba(7,32,48,.07); }
  .con-prompt h2 { margin-bottom:3px; font-size:1.08rem; }
  .con-prompt p { font-size:.78rem; line-height:1.25; }
  .con-model-panel { order:2; min-height:0; height:100%; }
  .con-model-stack.is-count-1 { min-height:0; }
  .con-model-stack.is-count-2 { min-height:0; grid-template-rows:repeat(2,minmax(0,1fr)); }
  .con-model-stack.is-count-3 { min-height:0; grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:repeat(2,minmax(0,1fr)); }
  .con-model-stack.is-count-4 { min-height:0; grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:repeat(2,minmax(0,1fr)); }
  .con-model-stack.is-count-5 { min-height:0; grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:minmax(0,1.35fr) minmax(0,.9fr) minmax(0,1.05fr); }
  .con-response-panel { order:3; margin-top:0; padding:8px 10px; border:1px solid var(--con-line); border-radius:12px; background:#fff; box-shadow:0 8px 22px rgba(7,32,48,.07); }
  .con-actions { margin-top:7px; }
  .con-feedback { min-height:42px; margin-top:6px; padding:6px 8px; font-size:.8rem; }
  .con-reveal-answer { margin-top:6px; padding:7px; font-size:.82rem; }
  .con-model-panel { padding:6px; }
  .con-model-stack { gap:6px; }
  .con-model-block { padding:6px; }
  .con-model-guide { margin-bottom:2px; font-size:.75rem; line-height:1.1; }
  .con-part-whole-grid { gap:4px; }
  .con-part-whole-block { padding:3px; }
  .con-part-whole-card { padding:2px; }
  .con-settings-panel { position:fixed; top:190px; right:16px; }
}
@media (min-width:700px) and (max-width:900px) {
  .topbar { grid-template-columns:minmax(0,1fr) auto; gap:10px; padding:8px 12px; }
  .brand { gap:9px; }
  .brand-logo img { width:108px; height:auto; }
  .brand h1 { font-size:1.12rem; }
  .top-actions { display:grid; grid-template-columns:repeat(6,44px); gap:5px; }
  .icon-button,.home-button { min-width:44px; min-height:44px; }
  .home-button { padding-inline:4px; font-size:.76rem; }
  .con-settings-panel { top:130px; }
}
@media (max-width:560px) {
  html,body { max-width:100%; }
  .topbar { gap:7px; padding:8px 10px; }
  .brand { display:flex; gap:8px; }
  .brand-logo img { width:108px; height:auto; }
  .brand h1 { font-size:1.05rem; overflow-wrap:anywhere; }
  .top-actions { width:100%; display:grid; grid-template-columns:repeat(auto-fit,minmax(44px,1fr)); gap:5px; }
  .icon-button,.home-button { min-width:44px; min-height:44px; }
  .home-button { padding-inline:4px; font-size:.76rem; }
  .con-toolbar-group { flex-wrap:wrap; }
  .con-settings { margin-left:0; }
  .con-settings-panel { top:166px; right:10px; width:calc(100vw - 20px); max-height:calc(100vh - 180px); }
  .con-model-controls-panel { position:fixed; top:166px; left:10px; width:calc(100vw - 20px); max-height:calc(100vh - 180px); overflow:auto; }
  .con-settings-grid,.con-settings-cards,.con-setting-card { grid-template-columns:1fr; }
  .con-setting-card > strong { grid-column:auto; }
  .con-setting-actions #conReset,.con-setting-actions #conApplySettings { width:100%; margin-left:0; }
  .con-workspace { grid-template-columns:minmax(0,1fr); gap:7px; padding:7px; }
  .con-prompt,.con-response-panel,.con-model-panel { width:100%; min-width:0; }
  .con-model-panel { padding:5px; }
  .con-model-stack { gap:5px; }
  .con-model-block { padding:5px; }
  .con-model-guide { margin-bottom:2px; font-size:.72rem; line-height:1.1; }
  .con-part-whole-grid { gap:4px; }
  .con-part-whole-grid:is(.is-card-count-3,.is-card-count-4,.is-card-count-5) { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .con-part-whole-grid:is(.is-card-count-3,.is-card-count-5) > .con-part-whole-card:last-child { grid-column:1 / -1; }
  .con-part-whole-card { padding:3px; }
  .con-diagram-host svg { max-height:100%; }
}
@media (prefers-reduced-motion:reduce) { .con-tool * { scroll-behaviour:auto!important; transition:none!important; animation:none!important; } }
@media print {
  @page { size:A4 landscape; margin:8mm; }
  html,body { width:100%; height:auto!important; overflow:visible!important; background:#fff!important; }
  .topbar,.con-toolbar,.con-actions,.con-instructions,.classroom-tools-layer,.annotation-toolbar,.con-model-guide { display:none!important; }
  .app,.con-tool,.con-workspace { min-height:0!important; height:auto!important; overflow:visible!important; }
  .con-tool { background:#fff; }
  .con-workspace { height:164mm!important; display:grid; grid-template-columns:70mm 1fr; gap:5mm; padding:0; }
  .con-left-panel,.con-model-panel { overflow:hidden; border:1px solid #93a9b7; box-shadow:none; }
  .con-left-panel { min-height:164mm; height:164mm; display:flex; padding:4mm; }
  .con-model-panel { min-height:164mm; height:164mm; }
  .con-pupil-panel,.con-model-panel { padding:4mm; }
  .con-prompt { margin-bottom:2mm; padding:2mm; }
  .con-model-stack { transform:none; }
  .con-model-stack.is-count-2 { grid-template-rows:1fr .82fr; }
  .con-model-stack.is-count-3 { grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:repeat(2,minmax(0,1fr)); }
  .con-model-stack.is-count-4 { grid-template-columns:repeat(2,minmax(0,1fr)); grid-template-rows:repeat(2,minmax(0,1fr)); }
  .con-model-stack.is-count-5 { grid-template-columns:repeat(3,minmax(0,1fr)); grid-template-rows:repeat(2,minmax(0,1fr)); }
  .con-model-block { padding:2mm; }
  .con-diagram-host svg { max-height:100%; }
}