:root{color:#183b42;background:#edf0e8;font-family:Inter,ui-rounded,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none}*{box-sizing:border-box}body{background:radial-gradient(circle at top right,rgb(229 198 139 / 35%),transparent 30%),linear-gradient(180deg,#f4f0e7,#e9efe8);min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}button,.link-button,.file-button{min-height:56px;border-radius:14px;cursor:pointer;font-weight:750}button:focus-visible,a:focus-visible,input:focus-visible{outline:4px solid #0ea5e9;outline-offset:3px}.welcome-shell,.loading-shell{width:min(620px,calc(100% - 32px));min-height:100vh;margin:0 auto;display:grid;align-content:center;justify-items:center;gap:18px;text-align:center;padding:36px 0}.welcome-shell p{font-size:1.1rem;line-height:1.55}.app-mark{width:min(220px,55vw);filter:drop-shadow(0 16px 18px rgb(22 101 52 / 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12px;max-width:690px;padding:14px;text-align:left}.helper-panel p{line-height:1.5;margin-bottom:0}.ask-dad-button{color:#285a69;font-weight:800}.ask-dad-panel,.focus-reset{background:#eff5f3;border:2px solid #8bb3aa;border-radius:18px;margin:18px auto;max-width:690px;padding:18px;text-align:left}.ask-dad-panel p{line-height:1.5;margin:0 0 10px}.support-choice-label{font-weight:800;margin-top:16px!important}.support-methods{display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.support-method-button{background:#f7fbfb;border:2px solid #8fb6b0;color:#214f49;font-size:.98rem;min-height:54px;padding:9px}.focus-reset{align-items:center;background:#edf4f0;display:flex;flex-direction:column;text-align:center}.focus-reset h2{margin:6px 0}.focus-reset p{line-height:1.5;margin:4px auto 14px;max-width:40ch}.breath-orb{animation:jsf-breathe 6s ease-in-out infinite;background:radial-gradient(circle at 35% 30%,#e4fbff,#56a7a3);border:4px solid 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#9db7ad;border-radius:15px;min-height:150px;padding:12px}.base-ten-material:nth-child(1){border-color:#7a6399}.base-ten-material:nth-child(2){border-color:#4c8d80}.base-ten-material:nth-child(3){border-color:#c49345}.base-ten-material p{font-weight:800;margin:0}.base-ten-material strong{color:#245d70;display:block;font-size:1.55rem;margin:6px 0}.base-ten-block-row{align-items:flex-start;display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:8px 0;min-height:30px}.base-ten-block{align-items:center;background:#dceee6;border:2px solid #4a8f7d;border-radius:6px;color:#245d70;display:inline-flex;font-size:.72rem;font-weight:850;justify-content:center;position:relative}.base-ten-block--tens{background-image:repeating-linear-gradient(90deg,transparent 0 7px,rgb(36 93 112 / 28%) 7px 8px);height:27px;width:82px}.base-ten-block--hundreds{background-color:#e8e0f0;background-image:linear-gradient(rgb(122 99 153 / 24%) 1px,transparent 1px),linear-gradient(90deg,rgb(122 99 153 / 24%) 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0}.place-value-materials{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));margin-top:16px}.place-value-material{background:#fffefa;border:2px solid #9db7ad;border-radius:15px;min-height:152px;padding:12px}.place-value-material--ones{border-color:#c69a4d}.place-value-material--tens{border-color:#4d8f7f}.place-value-material--hundreds{border-color:#80639b}.place-value-material p{font-weight:800;margin:0}.place-value-material strong{color:#245d70;display:block;font-size:1.55rem;margin:6px 0}.ten-bundle-row,.hundred-bundle-row{display:flex;flex-wrap:wrap;gap:7px;justify-content:center;margin:10px 0;min-height:34px}.ten-bundle,.hundred-bundle{align-items:center;background:#dceee6;border:2px solid #4a8f7d;border-radius:8px;color:#245d70;display:inline-flex;font-size:.82rem;font-weight:850;height:31px;justify-content:center;width:42px}.hundred-bundle{background:#eee5f4;border-color:#80639b;width:50px}.place-value-summary{color:#245d70;font-size:1.1rem;margin:16px 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