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14px;font-weight:900}.settings-button:hover{background:var(--paper-strong);transform:translateY(-1px)}.settings-panel{z-index:5;border:2px solid var(--ink);background:var(--paper);width:min(340px,100vw - 32px);box-shadow:var(--shadow);border-radius:8px;gap:6px;padding:10px;display:grid;position:absolute;top:calc(100% + 8px);right:0}.settings-row{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;display:grid}.settings-toggle{min-height:34px;color:var(--ink);grid-template-columns:22px minmax(0,1fr);align-items:center;gap:8px;font-size:.9rem;font-weight:800;display:grid}.settings-toggle input{width:18px;height:18px;accent-color:var(--blue)}.settings-order-controls{grid-template-columns:repeat(2,32px);gap:4px;display:grid}.settings-order-controls button{border:2px solid var(--ink);width:32px;height:32px;color:var(--ink);cursor:pointer;background:#fff;border-radius:8px;place-items:center;font-size:1rem;font-weight:900;line-height:1;display:grid}.settings-order-controls button:disabled{border-color:var(--line);color:var(--line);cursor:default}.settings-order-controls button:not(:disabled):hover{background:var(--paper-strong);transform:translateY(-1px)}.reveal-all-toggle[aria-pressed=true]{color:var(--ink);background:#fff}.reveal-all-toggle:hover{transform:translateY(-1px)}.panels{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.panel{border:2px solid var(--line);background:var(--paper);border-radius:8px;min-width:0;padding:18px}.panel.wide{grid-column:1/-1}.panel-title{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:16px;display:flex}.panel-title h2{margin-bottom:0;font-size:clamp(1.2rem,3vw,1.6rem);line-height:1}.panel-title p{color:var(--muted);margin-top:6px;margin-bottom:0;font-weight:700}.reveal-toggle{border:2px solid var(--ink);background:var(--blue);color:#fff;cursor:pointer;border-radius:8px;flex:none;min-width:78px;min-height:40px;font-weight:900}.reveal-toggle[aria-pressed=true]{color:var(--ink);background:#fff}.reveal-toggle:hover{transform:translateY(-1px)}.numberline-shell{overflow-x:auto}.static-numberline{width:100%;min-width:680px;height:auto;display:block}.svg-axis-line{stroke:var(--ink);stroke-width:2px;shape-rendering:crispedges}.svg-grid-line{stroke:#d5dde2;stroke-width:1px;shape-rendering:crispedges}.svg-tick-line{stroke:var(--ink);stroke-width:1.5px;shape-rendering:crispedges}.svg-rod{stroke:#fff;stroke-width:1px}.fraction-rod{fill:#2f7bd32e}.fraction-rod-selected{fill:var(--blue)}.decimal-rod{fill:#2f9b732e}.decimal-rod-selected{fill:var(--green)}.svg-rod-text{fill:var(--muted);text-anchor:middle;dominant-baseline:middle;font-size:18px;font-weight:900}.svg-rod-text-selected{fill:#fff}.svg-math-label{height:100%;color:var(--muted);justify-content:center;align-items:flex-start;font-size:2rem;font-weight:900;display:flex;overflow:visible}.svg-math-label .katex{font-size:1em}.svg-math-label-active,.svg-math-label-active .katex{color:var(--red)}.svg-decimal-math-label{font-size:1.25rem;font-weight:400}.svg-decimal-math-label .katex{font-size:1em;font-weight:400}.svg-answer-fill{opacity:.82}.fraction-answer-fill{fill:var(--blue)}.decimal-answer-fill{fill:var(--green)}.svg-answer-marker{stroke:var(--red);stroke-width:3px}.svg-answer-label{border:2px solid var(--ink);background:var(--yellow);min-height:30px;color:var(--ink);border-radius:8px;place-items:center;font-size:1rem;font-weight:900;display:grid}.svg-answer-label .katex{font-size:.95em}.pie{width:min(100%,300px);margin:0 auto;display:block}.pie-set{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));align-items:center;gap:18px;display:grid}.pie path,.pie circle{stroke:var(--paper);stroke-width:3px;stroke-linejoin:round}.pie-selected{fill:var(--red)}.equivalence-fill-blue{fill:var(--blue)}.equivalence-fill-green{fill:var(--green)}.equivalence-fill-red{fill:var(--red)}.equivalence-fill-yellow{fill:var(--yellow)}.pie-empty{fill:#f2ead9}.equivalence-view{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:clamp(12px,4vw,34px);display:grid}.equivalence-part{justify-items:center;gap:10px;display:grid}.equivalence-pie{width:min(100%,260px)}.equivalence-pie path,.equivalence-pie circle{stroke:var(--paper);stroke-width:2px;stroke-linejoin:round}.equivalence-group-lines line{stroke:var(--paper);stroke-linecap:round;stroke-width:7px}.equivalence-symbol{font-size:clamp(2rem,7vw,4rem);font-weight:900}.equivalence-label{min-height:34px;color:var(--ink);font-size:1.35rem;font-weight:900}.equivalence-label .katex,.equivalence-equation .katex{font-size:1em}.equivalence-equation{text-align:center;min-height:34px;margin-top:14px;font-size:1.45rem;font-weight:900}.equivalence-control{max-width:460px}.percentage-vis{grid-template-columns:minmax(0,1fr) minmax(82px,auto);align-items:center;gap:18px;padding-bottom:48px;display:grid}.percentage-track{height:32px;box-shadow:inset 0 2px 0 var(--ink), inset 0 -2px 0 var(--ink);background:#fff;border:0;position:relative}.percentage-fill{background:var(--green);height:100%}.percentage-markers{pointer-events:none;position:absolute;inset:0}.percentage-markers span{color:var(--muted);white-space:nowrap;font-size:.82rem;font-weight:800;position:absolute;top:48px;transform:translate(-50%)}.percentage-markers span:first-child{transform:translate(0)}.percentage-markers span:first-child:before{left:0}.percentage-markers span:last-child{transform:translate(-100%)}.percentage-markers span:last-child:before{left:100%}.percentage-markers span:before{content:"";background:#aab4bb;width:1px;height:38px;position:absolute;bottom:30px;left:50%}.percentage-current{border-left:3px solid var(--red);width:0;height:100%;position:absolute;top:0;left:0}.percentage-current span{border:2px solid var(--ink);background:var(--yellow);color:var(--ink);white-space:nowrap;border-radius:8px;padding:4px 7px;font-size:.95rem;font-weight:900;position:absolute;top:39px;left:0;transform:translate(-50%)}.percentage-current.at-start span{transform:translate(0)}.percentage-current.at-end span{transform:translate(-100%)}.percentage-answer{border:2px solid var(--ink);background:var(--paper-strong);border-radius:8px;place-items:center;min-width:82px;min-height:58px;font-size:1.5rem;font-weight:900;display:grid}.coins{flex-wrap:wrap;align-content:flex-start;gap:12px;min-height:132px;display:flex}.coin{place-items:center;width:72px;height:72px;display:inline-grid}.coin-image{position:relative}.coin-image img{object-fit:contain;filter:drop-shadow(0 4px 5px #0000002e);width:100%;height:100%}.coin-fraction img{position:absolute;inset:0}.coin-fraction-ghost{opacity:.22}.coin-fraction-fill{-webkit-mask-image:conic-gradient(#000 0 var(--coin-fill), transparent var(--coin-fill) 100%);mask-image:conic-gradient(#000 0 var(--coin-fill), transparent var(--coin-fill) 100%);-webkit-mask-image:conic-gradient(#000 0 var(--coin-fill), transparent var(--coin-fill) 100%)}.coin-hidden{color:var(--muted);background:#fff;border:3px dashed #0000003d;border-radius:50%;font-weight:900;box-shadow:inset 0 5px 10px #ffffff73,inset 0 -6px 10px #00000024}.zero-money{color:var(--muted);font-size:2rem;font-weight:900}.hint{color:var(--muted);margin:8px 0 0;font-size:.9rem;font-weight:700}.grid{gap:4px;display:grid}.grid span{aspect-ratio:1;background:#fff;border:1px solid #cad2d7;border-radius:3px}.grid span.selected{background:var(--green);border-color:#1d6f56}.grid span.partial{background:linear-gradient(90deg, var(--green) 0 var(--partial-fill), white var(--partial-fill) 100%);border-color:#1d6f56}.hundred-grid{grid-template-columns:repeat(10,1fr)}.custom-grid{width:100%;max-width:var(--grid-max-width);grid-template-columns:repeat(var(--columns), minmax(0, 1fr))}.inline-control{grid-template-columns:auto minmax(90px,1fr) 32px;align-items:center;gap:10px;margin-bottom:14px;display:grid}.inline-control input{width:100%;accent-color:var(--green)}.inline-control strong{text-align:right;font-size:1.1rem}.apples,.apple-group{gap:10px;display:grid}.apple-groups{gap:14px;display:grid}.apple-group{grid-template-columns:repeat(var(--apple-columns), 38px);border:2px solid var(--line);background:var(--paper-strong);border-radius:8px;padding:10px;overflow-x:auto}.apple{aspect-ratio:1;border:2px solid var(--line);filter:grayscale();opacity:.38;background:#fff;border-radius:8px;place-items:center;font-size:1.55rem;display:grid}.apple.selected{filter:none;opacity:1;background:#ffe9e6;border-color:#ba2f2f}@media (width<=760px){main{padding:12px}.intro,.panels{grid-template-columns:1fr}.panel-title{align-items:flex-start}.panel-title p{text-align:left}.reveal-toggle{min-width:68px}.static-numberline{min-width:620px}.inline-control{grid-template-columns:1fr 70px}.inline-control input{grid-area:2/1/auto/-1}.equivalence-view{grid-template-columns:1fr}.equivalence-symbol{line-height:1}.percentage-vis{grid-template-columns:1fr;padding-bottom:34px}.percentage-answer{width:max-content}}