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output{background:#fff2c9;border:2px solid #b88c22;border-radius:6px;place-items:center;min-width:60px;height:60px;display:grid}.number-pad{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;width:min(100%,264px);display:grid}.number-pad button{color:#21313b;cursor:pointer;background:#fff;border:1px solid #82998e;border-radius:6px;min-height:52px;font-size:24px}.number-pad .erase-digit{grid-column:span 2}.arithmetic-notice{color:#923b1c;font-size:18px}.arithmetic-workspace button:focus-visible{outline-offset:2px;outline:3px solid #2169b5}.practice-tabs{flex-wrap:wrap;gap:8px;margin:20px 0;display:flex}.practice-tabs button{border:2px solid var(--line);min-height:48px;color:var(--foreground);font:inherit;cursor:pointer;background:#fff;border-radius:8px;padding:12px 18px}.practice-tabs button[aria-pressed=true]{border-color:var(--mint-dark);background:#e5f7ef}.practice-help{text-align:center;margin:20px 0}.practice-help p,.worked-explanation{color:var(--mint-dark);font-size:20px;line-height:1.5}.worked-explanation{text-align:center;margin:20px 0}.question-panel>.primary-action{margin:20px auto;display:block}.math-activity{justify-items:center;gap:24px;margin:24px 0;display:grid}.math-activity>.primary-action{min-height:48px}.bead-rack{gap:24px;width:min(100%,600px);padding:16px 0;display:grid}.bead-rail{grid-template-columns:repeat(11,minmax(0,1fr));align-items:center;min-height:48px;display:grid;position:relative}.bead-rail:before{content:"";background:#68716f;height:4px;position:absolute;inset:calc(50% - 2px) 0 auto}.rack-bead{cursor:pointer;background:0 0;border:0;grid-row:1;width:100%;height:48px;padding:0;position:relative}.rack-bead:after{content:"";aspect-ratio:1;background:#cd4055;border:2px solid #81313d;border-radius:50%;width:90%;max-height:44px;margin:auto;display:block}.white-bead:after{background:#fff;border-color:#68716f}.bead-rack output{text-align:center;font-size:20px;font-weight:700}.split-workspace{text-align:center;width:min(100%,540px);margin:20px auto}.split-total{margin-bottom:16px;font-size:24px;display:block}.split-trays{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.split-tray{border:2px solid #357969;border-radius:8px;flex-direction:column;align-items:center;gap:12px;min-height:220px;padding:12px;display:flex}.split-tray:last-child{border-color:#bd485b}.split-tokens{flex:1;grid-template-columns:repeat(2,44px);align-content:start;gap:4px;min-height:236px;display:grid}.split-token{cursor:pointer;background:#78ceb3;border:3px solid #286858;border-radius:50%;width:44px;height:44px;display:block}.split-tray output{font-size:24px;font-weight:700}.placing-line{grid-template-columns:repeat(6,minmax(0,1fr));width:min(100%,600px);padding:16px 0;display:grid}.line-point{cursor:pointer;color:#173e36;background:0 0;border:0;grid-template-rows:48px 24px 32px;place-items:center;padding:0;font-size:20px;display:grid;position:relative}.line-point:before{content:"";background:#357969;height:2px;position:absolute;top:59px;left:0;right:0}.line-point:first-child:before{left:50%}.line-point:last-child:before{right:50%}.line-tick{background:#357969;width:3px;height:20px}.line-marker{border-radius:8px;place-items:center;width:44px;height:44px;display:grid}.line-point[aria-pressed=true] .line-marker{background:#f4cf58;border:2px solid #80660e}.math-activity button:focus-visible{outline-offset:3px;outline:3px solid #2169b5}.math-activity button:disabled{cursor:default}@media (width<=420px){.split-tray{padding:8px}.split-trays{gap:8px}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}