.abaco_abacus-module_page{--ab-ink:#20312e;--ab-muted:#52615e;--ab-line:#d5ded9;--ab-paper:#fff;--ab-cream:#fff9ed;--ab-yellow:#ffd75e;--ab-mint:#dff3ea;--ab-sky:#dceeff;--ab-peach:#ffe6dc;--ab-blue:#1f78d1;--ab-red:#e6332a;--ab-red-text:#b32420;--ab-action:#b92721;--ab-action-hover:#961b17;--ab-light-text:#d7e7de;background:var(--ab-cream);min-height:100vh;color:var(--ab-ink);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:Avenir Next,Avenir,Trebuchet MS,system-ui,sans-serif;font-size:16px;line-height:1.5}.abaco_abacus-module_page :where(h1,h2,h3,p){margin:0}.abaco_abacus-module_page [hidden]{display:none!important}.abaco_abacus-module_page button,.abaco_abacus-module_page a,.abaco_abacus-module_page input{-webkit-tap-highlight-color:transparent}.abaco_abacus-module_page button{cursor:pointer;touch-action:manipulation}.abaco_abacus-module_page button:disabled{cursor:default}.abaco_abacus-module_page :is(a,button,input):focus-visible{outline-offset:4px;outline:3px solid #327bf0}.abaco_abacus-module_page svg{flex-shrink:0}.abaco_abacus-module_shell{width:min(1280px,100% - 72px);margin-inline:auto}.abaco_abacus-module_header{background:var(--ab-cream);border-bottom:1px solid var(--ab-line)}.abaco_abacus-module_header>.abaco_abacus-module_shell{justify-content:space-between;align-items:center;gap:24px;min-height:88px;display:flex}.abaco_abacus-module_brand{color:var(--ab-ink);align-items:center;gap:15px;text-decoration:none;display:inline-flex}.abaco_abacus-module_brand img{object-fit:contain;width:55px;height:58px}.abaco_abacus-module_brand>span{border-left:1px solid var(--ab-line);padding-left:16px}.abaco_abacus-module_brand strong{letter-spacing:-1.2px;font-size:28px;font-weight:800;line-height:1;display:block}.abaco_abacus-module_brand strong span{color:var(--ab-red)}.abaco_abacus-module_brand small{letter-spacing:1.8px;margin-top:5px;font-size:10px;font-weight:750;display:block}.abaco_abacus-module_header nav{align-items:center;gap:28px;font-size:14px;font-weight:650;display:flex}.abaco_abacus-module_resourcesLink{color:var(--ab-muted);text-decoration:none}.abaco_abacus-module_storeLink{color:var(--ab-ink);align-items:center;gap:12px;padding:10px 0;text-decoration:none;display:inline-flex}.abaco_abacus-module_storeLink svg{width:17px}.abaco_abacus-module_page a:hover{text-underline-offset:4px;text-decoration:underline}.abaco_abacus-module_intro{justify-content:space-between;align-items:flex-end;gap:24px;padding:34px 0 28px;display:flex}.abaco_abacus-module_eyebrow{color:var(--ab-red-text);letter-spacing:1.4px;align-items:center;gap:9px;font-size:12px;font-weight:750;display:flex}.abaco_abacus-module_eyebrow>span{background:var(--ab-red);border-radius:50%;width:7px;height:7px}.abaco_abacus-module_intro h1{letter-spacing:-1.7px;margin-top:9px;font-size:clamp(32px,3.7vw,46px);font-weight:800;line-height:1.12}.abaco_abacus-module_intro h1>span{color:var(--ab-red)}.abaco_abacus-module_intro .abaco_abacus-module_introText{color:var(--ab-muted);margin-top:10px;font-size:16px}.abaco_abacus-module_guideLink{color:var(--ab-muted);align-items:center;gap:9px;margin-bottom:4px;font-size:14px;font-weight:650;text-decoration:none;display:inline-flex}.abaco_abacus-module_lab{border:2px solid var(--ab-ink);box-shadow:5px 5px 0 var(--ab-ink);background:#fff;border-radius:22px;scroll-margin-top:20px;overflow:hidden}.abaco_abacus-module_toolbar{border-bottom:1px solid var(--ab-line);justify-content:space-between;align-items:center;gap:16px;padding:16px 28px;display:flex}.abaco_abacus-module_modes{background:var(--ab-cream);border-radius:12px;gap:4px;padding:4px;display:flex}.abaco_abacus-module_modes button{min-height:43px;color:var(--ab-muted);background:0 0;border:0;border-radius:9px;justify-content:center;align-items:center;gap:8px;padding:8px 19px;font-size:14px;font-weight:700;transition:background .15s,color .15s;display:inline-flex}.abaco_abacus-module_modes button[aria-pressed=true]{background:var(--ab-yellow);color:var(--ab-ink);box-shadow:2px 2px 0 var(--ab-ink)}.abaco_abacus-module_modes button[aria-pressed=true] svg{color:var(--ab-blue)}.abaco_abacus-module_modeCount{min-width:20px;height:20px;color:var(--ab-muted);background:#dde5ef;border-radius:5px;place-items:center;padding:0 5px;font-size:12px;display:grid}.abaco_abacus-module_clearButton{min-height:44px;color:var(--ab-muted);background:0 0;border:0;align-items:center;gap:8px;padding:6px 0 6px 12px;font-size:14px;font-weight:600;display:inline-flex}.abaco_abacus-module_clearButton:hover:not(:disabled){color:var(--ab-red)}.abaco_abacus-module_clearButton:disabled{opacity:.4}.abaco_abacus-module_labGrid{grid-template-columns:minmax(0,1fr) 330px;display:grid}.abaco_abacus-module_manipulative{background:radial-gradient(ellipse at 50% 40%, var(--ab-cream) 0, #fff 75%);min-width:0;padding:26px 30px 24px}.abaco_abacus-module_boardHeading{text-align:center}.abaco_abacus-module_boardHeading h2{letter-spacing:-.4px;font-size:21px;font-weight:750}.abaco_abacus-module_boardHeading p{color:var(--ab-muted);margin-top:4px;font-size:14px}.abaco_abacus-module_board{grid-template-columns:repeat(3,minmax(0,1fr));max-width:650px;margin:22px auto 0;display:grid}.abaco_abacus-module_column{text-align:center;min-width:0}.abaco_abacus-module_hundreds{--place:var(--ab-yellow);--place-dark:#95660a;--place-pale:#fff2bd;--place-text:var(--ab-ink)}.abaco_abacus-module_tens{--place:var(--ab-action);--place-dark:var(--ab-action-hover);--place-pale:var(--ab-peach);--place-text:#fff}.abaco_abacus-module_ones{--place:#1c70c4;--place-dark:#19558f;--place-pale:var(--ab-sky);--place-text:#fff}.abaco_abacus-module_columnLabel{margin-bottom:14px}.abaco_abacus-module_letter{width:32px;height:32px;color:var(--place-dark);background:var(--place-pale);border-radius:9px;place-items:center;margin:0 auto 6px;font-size:16px;font-weight:800;display:grid}.abaco_abacus-module_columnLabel h3{font-size:16px;font-weight:750}.abaco_abacus-module_columnLabel p{color:var(--ab-muted);margin-top:3px;font-size:12px}.abaco_abacus-module_columnLabel b{color:var(--ab-ink)}.abaco_abacus-module_rod{flex-direction:column;align-items:center;width:100%;max-width:158px;margin:0 auto;padding:9px 15px 4px;display:flex;position:relative}.abaco_abacus-module_rod:before{content:"";background:linear-gradient(90deg,#b9c6d3,#e2e9ee 45%,#a4b4c4);border-radius:5px 5px 0 0;width:8px;position:absolute;inset:0 auto 0 50%;transform:translate(-50%)}.abaco_abacus-module_slot{background:0 0;border:0;justify-content:center;align-items:center;width:100%;height:28px;padding:3px 0;display:flex;position:relative}.abaco_abacus-module_bead{color:#0000;background:#fffdf5d9;border:1px dashed #c4cfc8;border-radius:50%/42%;place-items:center;width:100%;height:22px;transition:background .15s,transform .15s;display:grid}.abaco_abacus-module_bead>span{font-size:12px;font-weight:750;line-height:1}.abaco_abacus-module_slot.abaco_abacus-module_filled .abaco_abacus-module_bead{height:23px;color:var(--place-text);background:var(--place);border:1px solid var(--place-dark);animation:.2s ease-out abaco_abacus-module_placeBead;box-shadow:inset 0 3px 2px #ffffff35,inset 0 -3px 2px #0000000d,0 2px 3px #20312e15}.abaco_abacus-module_slot:hover .abaco_abacus-module_bead{border-color:var(--place-dark);background:var(--place-pale);transform:translateY(-1px)scaleX(1.045)}.abaco_abacus-module_slot.abaco_abacus-module_filled:hover .abaco_abacus-module_bead{background:var(--place);filter:brightness(1.06)}.abaco_abacus-module_columnBase{background:var(--ab-ink);color:#fff;border-bottom:6px solid #13241f;place-items:center;height:30px;font-size:12px;font-weight:750;display:grid}.abaco_abacus-module_column:first-child .abaco_abacus-module_columnBase{border-radius:8px 0 0 8px}.abaco_abacus-module_column:last-child .abaco_abacus-module_columnBase{border-radius:0 8px 8px 0}.abaco_abacus-module_columnBase span{opacity:.75}.abaco_abacus-module_counter{grid-template-columns:44px minmax(28px,1fr) 44px;align-items:center;gap:6px;max-width:164px;margin:18px auto 0;padding-inline:4px;display:grid}.abaco_abacus-module_counter button{border:1px solid var(--ab-line);width:44px;height:44px;color:var(--ab-ink);background:#fff;border-radius:12px;font-size:26px;line-height:1;transition:background .15s,border-color .15s}.abaco_abacus-module_counter button:hover:not(:disabled){background:var(--place-pale);border-color:var(--place-dark)}.abaco_abacus-module_counter button:disabled{opacity:.3}.abaco_abacus-module_counter output{font-variant-numeric:tabular-nums;font-size:27px;font-weight:800}.abaco_abacus-module_contribution{color:var(--ab-muted);font-variant-numeric:tabular-nums;padding-top:7px;font-size:14px}.abaco_abacus-module_contribution>span{color:#a0abba;padding-inline:3px}.abaco_abacus-module_contribution b{color:var(--ab-ink)}.abaco_abacus-module_manipulative .abaco_abacus-module_boardNote{text-align:center;max-width:540px;color:var(--ab-muted);margin:18px auto 0;font-size:12px;line-height:1.5}.abaco_abacus-module_exploreTools{border-top:1px solid var(--ab-line);flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:14px 20px;margin-top:22px;padding-top:18px;display:flex}.abaco_abacus-module_examples{flex-wrap:wrap;gap:6px;display:flex}.abaco_abacus-module_examples>span{color:var(--ab-muted);flex-basis:100%;margin-bottom:3px;font-size:12px}.abaco_abacus-module_examples button{border:1px solid var(--ab-line);background:#fff;border-radius:9px;min-height:40px;padding:8px 14px;font-size:14px;font-weight:650}.abaco_abacus-module_examples button:hover,.abaco_abacus-module_examples button[aria-pressed=true]{background:var(--ab-mint);border-color:var(--ab-ink);color:var(--ab-red-text)}.abaco_abacus-module_numberForm label{color:var(--ab-muted);margin-bottom:8px;font-size:12px;display:block}.abaco_abacus-module_numberForm>div{border:1px solid var(--ab-line);background:#fff;border-radius:9px;min-height:40px;display:flex}.abaco_abacus-module_numberForm input{width:75px;min-width:0;color:var(--ab-ink);background:0 0;border:0;padding:7px 10px;font-size:16px}.abaco_abacus-module_numberForm button{background:var(--ab-mint);width:44px;color:var(--ab-red-text);border:0;border-radius:0 8px 8px 0;place-items:center;padding:6px;display:grid}.abaco_abacus-module_numberForm button:hover{background:var(--ab-mint)}.abaco_abacus-module_inputError{width:100%;color:var(--ab-red-text);font-size:14px}.abaco_abacus-module_insight{background:var(--ab-ink);color:#fff;min-width:0;padding:28px}.abaco_abacus-module_sideEyebrow{letter-spacing:1.1px;font-size:12px;font-weight:700}.abaco_abacus-module_insight .abaco_abacus-module_sideEyebrow{color:var(--ab-light-text)}.abaco_abacus-module_numberResult output{flex-direction:column;display:flex}.abaco_abacus-module_numberResult output strong{color:var(--ab-yellow);letter-spacing:-4px;font-variant-numeric:tabular-nums;font-size:clamp(70px,7vw,104px);font-weight:750;line-height:1.1}.abaco_abacus-module_numberResult output span{color:var(--ab-light-text);max-width:250px;min-height:48px;font-size:16px}.abaco_abacus-module_breakdown{border-top:1px solid #ffffff26;margin-top:22px;padding-top:22px}.abaco_abacus-module_breakdown h3{margin-bottom:16px;font-size:16px;font-weight:650}.abaco_abacus-module_breakdownRow{color:var(--ab-light-text);align-items:center;gap:10px;margin-top:12px;font-size:14px;display:flex}.abaco_abacus-module_placeDot{background:var(--place);width:26px;height:26px;color:var(--place-text);border-radius:7px;place-items:center;font-size:12px;font-weight:800;display:grid}.abaco_abacus-module_breakdownRow strong{color:#fff;font-variant-numeric:tabular-nums;margin-left:auto;font-size:18px;font-weight:700}.abaco_abacus-module_breakdown .abaco_abacus-module_equation{text-align:center;font-variant-numeric:tabular-nums;background:#ffffff0c;border-radius:10px;margin-top:20px;padding:15px 10px;font-size:16px;font-weight:650}.abaco_abacus-module_equation span{color:var(--ab-light-text);padding:0 3px;font-weight:400}.abaco_abacus-module_equation b{color:#fff}.abaco_abacus-module_notice{border-top:1px solid #ffffff26;gap:12px;margin-top:27px;padding-top:22px;display:flex}.abaco_abacus-module_notice>svg{color:var(--ab-yellow);margin-top:2px}.abaco_abacus-module_notice strong{color:#fff;font-size:14px}.abaco_abacus-module_notice p{color:var(--ab-light-text);margin-top:8px;font-size:14px;line-height:1.65}.abaco_abacus-module_mission{background:var(--ab-sky);color:var(--ab-ink);outline-offset:3px;border-radius:12px;margin:-4px -4px 23px;padding:17px 18px}.abaco_abacus-module_mission .abaco_abacus-module_sideEyebrow{color:var(--ab-red-text);letter-spacing:.3px;font-size:12px}.abaco_abacus-module_mission>strong{margin-top:7px;font-size:40px;font-weight:800;line-height:1.25;display:block}.abaco_abacus-module_mission>p:last-child{margin-top:3px;font-size:14px}.abaco_abacus-module_mission+.abaco_abacus-module_numberResult output strong{letter-spacing:-2px;font-size:65px}.abaco_abacus-module_challengeControls{margin-top:20px}.abaco_abacus-module_hintButton{min-height:44px;color:var(--ab-yellow);text-underline-offset:4px;background:0 0;border:0;align-items:center;gap:8px;padding:0;font-size:14px;text-decoration:underline;display:inline-flex}.abaco_abacus-module_hint{color:var(--ab-light-text);padding:10px 0 2px;font-size:14px}.abaco_abacus-module_feedback{min-height:55px;color:var(--ab-light-text);padding-block:13px;font-size:14px}.abaco_abacus-module_feedback.abaco_abacus-module_retry{background:var(--ab-peach);color:#704110;border-radius:9px;margin-block:10px;padding:12px}.abaco_abacus-module_feedback.abaco_abacus-module_correct{background:var(--ab-mint);color:#2b7555;border-radius:9px;margin-block:10px;padding:12px}.abaco_abacus-module_primaryButton{background:var(--ab-yellow);width:100%;min-height:48px;color:var(--ab-ink);border:0;border-radius:10px;justify-content:space-between;align-items:center;gap:10px;padding:12px 17px;font-size:14px;font-weight:750;display:flex}.abaco_abacus-module_primaryButton:hover{background:#ffe695}.abaco_abacus-module_progressBlock{border-top:1px solid var(--ab-line);margin-top:22px;padding-top:20px}.abaco_abacus-module_progressBlock>div{justify-content:space-between;gap:12px;font-size:14px;display:flex}.abaco_abacus-module_progressBlock>div>span{color:var(--ab-muted)}.abaco_abacus-module_progressBlock strong{font-weight:650}.abaco_abacus-module_progressBlock ol{gap:9px;margin:15px 0 0;padding:0;list-style:none;display:flex}.abaco_abacus-module_progressBlock li{background:var(--ab-cream);min-height:34px;color:var(--ab-muted);border:1px solid #0000;border-radius:7px;flex:1;place-items:center;font-size:14px;font-weight:650;display:grid}.abaco_abacus-module_progressBlock li.abaco_abacus-module_currentStep{border-color:var(--ab-ink)}.abaco_abacus-module_progressBlock li.abaco_abacus-module_completeStep{background:var(--ab-mint);color:#2b7555}.abaco_abacus-module_finish{border-top:1px solid #ffffff26;margin-top:22px;padding-top:20px}.abaco_abacus-module_finishIcon{color:#2b7555;background:#b2edcc;border-radius:50%;place-items:center;width:38px;height:38px;margin-bottom:12px;display:grid}.abaco_abacus-module_finish h3{font-size:20px;line-height:1.3}.abaco_abacus-module_finish p{color:var(--ab-light-text);margin:10px 0 20px;font-size:14px}.abaco_abacus-module_offline{padding:48px 0 36px;scroll-margin-top:25px}.abaco_abacus-module_offlineHeading{justify-content:space-between;align-items:flex-end;gap:24px;display:flex}.abaco_abacus-module_offlineHeading h2{letter-spacing:-.8px;margin-top:8px;font-size:28px;font-weight:750;line-height:1.2}.abaco_abacus-module_offlineHeading>p{color:var(--ab-muted);max-width:280px;font-size:14px}.abaco_abacus-module_activitySteps{grid-template-columns:repeat(3,1fr);gap:30px;margin:28px 0 0;padding:0;list-style:none;display:grid}.abaco_abacus-module_activitySteps li{align-items:flex-start;gap:15px;display:flex}.abaco_abacus-module_activitySteps li>span{color:var(--ab-muted);padding-top:1px;font-size:14px;font-weight:800}.abaco_abacus-module_activitySteps h3{margin-bottom:9px;font-size:16px;font-weight:700}.abaco_abacus-module_activitySteps p{color:var(--ab-muted);font-size:16px;line-height:1.65}.abaco_abacus-module_physicalBridge{background:var(--ab-mint);border-radius:16px;align-items:center;gap:20px;margin:8px 0 0;padding:27px 30px;display:flex}.abaco_abacus-module_bridgeIcon{height:52px;color:var(--ab-muted);background:#fff;border-radius:14px;flex:0 0 52px;place-items:center;display:grid}.abaco_abacus-module_bridgeIcon svg{width:26px;height:26px}.abaco_abacus-module_physicalBridge .abaco_abacus-module_sideEyebrow{color:var(--ab-muted);letter-spacing:.7px;font-size:12px}.abaco_abacus-module_physicalBridge h2{letter-spacing:-.5px;margin-top:3px;font-size:23px;font-weight:750}.abaco_abacus-module_physicalBridge p:last-child{color:var(--ab-muted);margin-top:3px;font-size:14px}.abaco_abacus-module_physicalBridge a{min-height:44px;color:var(--ab-muted);flex-shrink:0;justify-content:center;align-items:center;gap:12px;margin-left:auto;padding:12px 0 12px 12px;font-size:14px;font-weight:750;text-decoration:none;display:inline-flex}.abaco_abacus-module_footer{color:var(--ab-muted);background:0 0;border:0;justify-content:space-between;align-items:center;gap:20px;margin:0;padding:29px 0;display:flex}.abaco_abacus-module_footer p{font-size:12px}.abaco_abacus-module_footer a{color:var(--ab-muted);align-items:center;gap:9px;font-size:14px;text-decoration:none;display:inline-flex}.abaco_abacus-module_srOnly{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.abaco_abacus-module_skipLink{z-index:100;color:var(--ab-ink);background:#fff;border-radius:8px;padding:12px;position:absolute;top:-100px;left:20px}.abaco_abacus-module_skipLink:focus{top:10px}@keyframes 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