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(width<=760px){.printable-choices{grid-template-columns:1fr}.standalone-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.standalone-filters{grid-template-columns:1fr}.standalone-modal{padding:10px}.standalone-modal-content{padding:14px}.standalone-card button{padding:12px}.standalone-card img{height:180px}}@media (width<=430px){.standalone-grid{grid-template-columns:1fr}.standalone-card img{height:230px}.choice-papers{gap:7px}.choice-papers img{width:85px;height:121px}.printable-choice{padding:22px}.choice-symbols{font-size:46px}}@scope([data-integrated-tool=bar-model-builder]){:scope{all:revert;--ink:#182136;--muted:#687287;--navy:#293b68;--navy-dark:#1d2b4d;--paper:#f4f1eb;--line:#d8dde6;--soft:#f7f8fa;--white:#fff;--focus:#2f78e8;min-height:100svh;display:block}@media (width<=800px){.builder-shell dialog.inspector{max-height:72dvh;padding-bottom:max(20px,env(safe-area-inset-bottom));top:auto;bottom:8px;transform:translate(-50%)}.classroom-mode .app-actions{flex-wrap:wrap}.classroom-mode .model-canvas{min-height:320px;padding:28px 12px}}.bar-cell{gap:4px}.bar-cell input{color:#172033;text-align:center;background:0 0;border:0;outline:0;max-width:calc(100% - 18px)}.bar-label-input{min-height:28px;padding:3px 5px;font-size:clamp(9px,1vw,12px);font-weight:760}.bar-label-input::placeholder{color:#3f4b61aa}.bar-value-input{letter-spacing:-.025em;min-height:48px;padding:2px 5px;font-size:clamp(25px,3.7vw,43px);font-weight:820}.bar-value-input::placeholder{color:#172033;opacity:1}.bar-cell input:focus{box-shadow:0 0 0 3px #fff,0 0 0 6px var(--focus);background:#ffffff9c;border-radius:7px}.bar-options-button{z-index:3;color:#344057;letter-spacing:1px;opacity:.45;background:#ffffff9c;border:1px solid #ffffffb8;border-radius:9px;width:38px;height:38px;padding:0;font-size:13px;font-weight:900;position:absolute;top:5px;right:5px}.bar-cell:hover .bar-options-button,.bar-cell.selected .bar-options-button,.bar-options-button:focus-visible{opacity:1}.bar-options-button:hover{background:#fff}.builder-shell dialog.inspector{width:min(370px,100vw - 24px)}.state-grid button:disabled{opacity:.45}@media (width<=560px){.bar-cell input{max-width:calc(100% - 8px)}.bar-options-button{width:32px;height:32px;font-size:11px;top:3px;right:3px}.bar-label-input{padding-right:24px}.bar-value-input{font-size:25px}}*{box-sizing:border-box}:scope{min-width:320px;color:var(--ink);background:var(--paper);font-family:var(--font-geist-sans), Arial, sans-serif;margin:0}button,input,textarea{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:2px}button:disabled{cursor:not-allowed;opacity:.4}.builder-shell{background:var(--paper);min-height:100vh}.eyebrow{color:#69758d;letter-spacing:.13em;text-transform:uppercase;font-size:10px;font-weight:820;display:inline-block}.appbar{border-bottom:1px solid var(--line);background:#fff;justify-content:space-between;align-items:center;gap:18px;min-height:72px;padding:10px 22px;display:flex}.brand-lockup{flex:none;align-items:center;gap:11px;display:flex}.brand-lockup h1,.brand-lockup small{display:block}.brand-lockup h1{letter-spacing:-.02em;margin:0;font-size:16px;font-weight:700}.brand-lockup small{color:var(--muted);margin-top:2px;font-size:10px}.brand-mark{background:var(--navy);color:#fff;border-radius:12px;place-items:center;width:43px;height:43px;font-size:12px;font-weight:850;display:grid;box-shadow:0 7px 16px #26375f24}.app-actions,.history-actions,.page-actions{align-items:center;gap:7px;display:flex}.history-actions{border-right:1px solid var(--line);padding-right:8px}.app-actions button,.page-actions button,.canvas-actions button{border:1px solid var(--line);color:#4f5c73;background:#fff;border-radius:10px;min-height:48px;padding:10px 14px;font-size:11px;font-weight:760}.app-actions button:hover,.page-actions button:hover,.canvas-actions button:hover{border-color:#aeb8c8}.app-actions .primary{border-color:var(--navy);background:var(--navy);color:#fff}.app-actions .primary:hover{background:var(--navy-dark)}.page-strip{border-bottom:1px solid var(--line);background:#fafbfc;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;min-height:58px;padding:6px 14px;display:grid}.page-strip-label{min-width:118px}.page-strip-label strong,.page-strip-label small{display:block}.page-strip-label strong{color:var(--navy);font-size:12px}.page-strip-label small{color:var(--muted);margin-top:2px;font-size:9px}.page-tabs{scrollbar-width:thin;gap:6px;min-width:0;display:flex;overflow-x:auto}.page-tabs button{color:#667186;white-space:nowrap;background:0 0;border:1px solid #0000;border-radius:9px;align-items:center;gap:7px;min-height:48px;padding:8px 12px;font-size:11px;font-weight:680;display:flex}.page-tabs button span{background:#e4e8ee;border-radius:50%;place-items:center;width:20px;height:20px;font-size:9px;font-weight:820;display:grid}.page-tabs button.active{color:var(--navy);background:#fff;border-color:#cbd2dd;box-shadow:0 3px 8px #2332520d}.page-tabs button.active span{background:var(--navy);color:#fff}.page-actions button{min-height:48px;padding:8px 11px;font-size:10px}.work-area{grid-template-columns:minmax(0,1fr) 350px;min-height:calc(100vh - 124px);display:grid}.canvas-column{min-width:0;padding:18px}.problem-card{border:1px solid var(--line);background:#fff;border-radius:16px;grid-template-columns:195px minmax(0,1fr);align-items:center;gap:16px;padding:14px 16px;display:grid}.problem-card strong,.problem-card small{display:block}.problem-card strong{font-size:13px}.problem-card small{color:var(--muted);margin-top:4px;font-size:9px;line-height:1.35}.problem-card textarea{resize:vertical;min-height:62px;max-height:135px;color:var(--ink);background:#fbfcfd;border:1px solid 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strong{letter-spacing:-.025em;margin-top:3px;font-size:clamp(25px,3.7vw,43px);font-weight:820}.bar-cell.unknown{background-image:repeating-linear-gradient(135deg,#0000,#0000 9px,#fff2 9px 18px)}.bar-cell.selected{z-index:2;box-shadow:inset 0 0 0 4px white, inset 0 0 0 7px var(--navy)}.whole-cell{width:100%}.parts-row{display:grid;position:relative;overflow:visible}.parts-row .bar-cell{border-top:0;flex-basis:0;min-width:0}.parts-row .bar-cell+.bar-cell{border-left:0}.add-part-button{color:#58667c;background:#f9fafb;border:2px dashed #aab4c4;border-radius:11px;width:100%;min-height:50px;margin-top:14px;font-size:12px;font-weight:780}.add-part-button:hover{border-color:var(--navy);color:var(--navy);background:#f1f4f9}.comparison-build{width:min(830px,100%);margin:auto}.comparison-line{align-items:stretch;width:100%;display:flex}.comparison-line .bar-cell{min-height:104px}.comparison-total .bar-cell{width:100%}.comparison-parts{display:grid;position:relative}.comparison-parts .bar-cell{border-top:0;flex-basis:0;min-width:0}.comparison-parts .bar-cell+.bar-cell{border-left:0}.comparison-difference{background-image:repeating-linear-gradient(135deg,#0000,#0000 9px,#ffffff30 9px 18px)}.comparison-note{color:#707b8e;text-align:center;margin:13px 0 0;font-size:9px}.bar-divider{z-index:7;cursor:ew-resize;touch-action:none;background:0 0;border:0;width:24px;min-height:100%;padding:0;position:absolute;top:0;bottom:0;transform:translate(-50%)}.bar-divider span{background:#313747;width:3px;transition:width .12s,background .12s;position:absolute;top:0;bottom:0;left:50%;transform:translate(-50%)}.bar-divider:hover span,.bar-divider:focus-visible span,.bar-divider.dragging span{background:#e10098;width:7px}.bar-divider:focus-visible{outline-offset:2px;outline:3px solid #e10098}.equation-work{border-top:1px solid var(--line);text-align:center;width:min(760px,100%);margin:35px auto 0;padding-top:22px}.equation-work label{color:#69758a;text-transform:uppercase;letter-spacing:.1em;font-size:9px;font-weight:780}.equation-work input{width:100%;color:var(--ink);text-align:center;background:0 0;border:0;border-bottom:2px solid #9da8b8;margin-top:7px;padding:10px 14px;font-size:clamp(22px,3.4vw,38px);font-weight:800}.canvas-actions{align-items:center;gap:8px;min-height:58px;padding:9px 3px 0;display:flex}.canvas-actions button.active{border-color:var(--navy);color:var(--navy);background:#e9edf6}.canvas-actions>span{color:#798396;margin-left:auto;font-size:9px}.inspector{border-left:1px solid var(--line);background:#fff;min-width:0;padding:23px 20px 35px}.inspector-heading{border-bottom:1px solid var(--line);padding:0 46px 18px 0;position:relative}.inspector-heading h2{letter-spacing:-.04em;margin:5px 0 3px;font-size:24px}.inspector-heading p{color:var(--muted);margin:0;font-size:10px}.inspector-close{border:1px solid var(--line);color:#58657a;background:#f1f3f7;border-radius:12px;width:48px;height:48px;font-size:24px;display:none;position:absolute;top:0;right:0}.state-grid{grid-template-columns:1fr;gap:7px;margin-top:17px;display:grid}.state-grid button{border:1px solid var(--line);background:var(--soft);color:#556177;text-align:left;border-radius:11px;flex-direction:column;justify-content:center;align-items:flex-start;min-height:68px;padding:9px 8px;display:flex}.state-grid button strong,.state-grid button small{display:block}.state-grid button strong{color:var(--ink);font-size:12px}.state-grid button small{color:#7b8598;margin-top:3px;font-size:8px}.state-grid button.active{border-color:var(--navy);background:var(--navy);color:#fff;box-shadow:inset 0 0 0 1px var(--navy)}.state-grid button.active strong,.state-grid button.active small{color:#fff}.field-label{color:#5f6b80;margin-top:17px;font-size:10px;font-weight:770;display:block}.field-label 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var(--line);background:#fff}.board-area{min-width:0;padding:clamp(22px,3vw,42px)}.column-toolbar{border:1px solid var(--line);background:#ffffffe0;border-radius:14px;flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:7px;max-width:1450px;margin:0 auto 15px;padding:9px 10px 9px 14px;display:flex;box-shadow:0 4px 14px #153b450b}.column-toolbar>div{min-width:0;margin-right:auto}.column-toolbar>div span,.column-toolbar>div strong{display:block}.column-toolbar>div span{color:var(--teal);letter-spacing:.1em;text-transform:uppercase;font-size:8px;font-weight:850}.column-toolbar>div strong{color:#506773;text-overflow:ellipsis;white-space:nowrap;margin-top:2px;font-size:10px;overflow:hidden}.column-toolbar button{background:var(--teal-soft);min-height:42px;color:var(--teal-dark);cursor:pointer;white-space:nowrap;border:1px solid #b8d4d2;border-radius:10px;justify-content:center;align-items:center;gap:7px;padding:0 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.counter-colour-picker button.drag-source span:before{content:"★";color:var(--counter-colour);text-shadow:0 2px 0 color-mix(in srgb,var(--counter-colour) 72%,black),0 3px 5px #2b31433d;font-size:31px;line-height:1}@media (width<=900px){.array-toolbar-group{border-bottom:1px solid #e3def8;border-right:0;flex:100%;padding:7px 0}.repeat-tools{border-bottom:0}.counter-colour-picker{flex-wrap:nowrap}.counter-colour-picker button{width:34px;height:34px}.focus-reveal-bar{position:static}.multiplication-builder{width:100%}.multiplication-builder label{flex:125px}.multiplication-builder input{margin-left:auto}.multiplication-builder .primary-build-action{flex:130px}.multiplication-builder .toolbar-clear-button{flex:80px}}img.brand-mark{object-fit:contain;box-shadow:none;background:0 0;border:0;border-radius:0;flex-shrink:0;padding:0;display:block!important}}