@import"https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,600;12..96,800&family=Nunito:wght@400;600;700;800&family=Martian+Mono:wght@400;700&display=swap";:root{--paper: #f2f5fb;--surface: #ffffff;--surface-2: #e7edf9;--ink: #161e3a;--muted: #5b658c;--line: #cbd5ec;--edge: #c3cde6;--pink: #e8286b;--pink-soft: #ffe4ee;--mint: #0e9e85;--mint-soft: #dcf6ef;--gold: #b77400;--gold-soft: #fff0d2;--sky: #2f62e0;--sky-soft: #dfe8ff;--shadow: rgba(22, 30, 58, .1);--radius: 16px;--f-pinky: #8b5cf6;--f-ring: #3b82f6;--f-middle: #06b6d4;--f-index: #f59e0b;--f-thumb: #94a3b8;--f-pinky-soft: #ede9fe;--f-ring-soft: #dbeafe;--f-middle-soft: #cffafe;--f-index-soft: #fef3c7;--f-thumb-soft: #e8edf5}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--paper: #0e1226;--surface: #181e3b;--surface-2: #222a4e;--ink: #edf0ff;--muted: #9ba5d0;--line: #333c68;--edge: #0a0d1c;--pink: #ff6b9d;--pink-soft: #3a1b2c;--mint: #38d9b4;--mint-soft: #0f3229;--gold: 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var(--edge)}.grade-pick.is-on{background:var(--pink);border-color:var(--pink);color:#fff}.grade-pick{position:relative}.grade-pick.has-medal{border-color:var(--gold)}.grade-medal{position:absolute;top:-7px;right:-6px;font-size:.78rem;line-height:1}.math-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}.math-card{font:inherit;text-align:left;cursor:pointer;color:var(--ink);background:var(--surface);border:2px solid var(--line);border-radius:var(--radius);padding:15px 16px 13px;box-shadow:0 5px 0 var(--edge);display:flex;flex-direction:column;gap:5px;transition:transform .12s,box-shadow .12s}.math-card:hover{transform:translateY(3px);box-shadow:0 2px 0 var(--edge)}.math-card.is-mastered{border-color:var(--mint)}.math-icon{font-size:1.8rem;line-height:1.1}.math-name{font-family:Bricolage Grotesque,sans-serif;font-weight:800;font-size:1.02rem}.math-summary{font-size:.84rem;color:var(--muted);flex:1}.math-meta{font-family:Martian 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circle{fill:var(--sky-soft)}.sc-arc{fill:none;stroke-width:9;stroke-linecap:round;opacity:.5}.sc-arc-1{stroke:var(--pink)}.sc-arc-2{stroke:var(--gold)}.sc-arc-3{stroke:var(--mint)}.sc-leaf{fill:var(--mint);opacity:.35}.sc-ghost{fill:none;stroke:var(--sky);stroke-width:2;stroke-dasharray:5 5;opacity:.5}.sc-rule{stroke:var(--line);stroke-width:1.5}.sc-roof{fill:var(--gold-soft);stroke:var(--gold);stroke-width:1.5;opacity:.7}.sc-page{fill:var(--surface-2);stroke:var(--line);stroke-width:1.5}.sc-hill{fill:var(--mint-soft)}.sc-hill-far{fill:var(--sky-soft)}.sc-sun{fill:var(--gold-soft);stroke:var(--gold);stroke-width:2}.sc-star{fill:var(--gold)}.sc-planet{fill:var(--sky-soft);stroke:var(--sky);stroke-width:2}.sc-ring{fill:none;stroke:var(--sky);stroke-width:2.5;opacity:.7}.sc-col{fill:var(--sky-soft)}.sc-trend{fill:none;stroke:var(--mint);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.math-stage.is-right{animation:math-pop .42s ease;border-color:var(--mint)}.math-stage.is-wrong{animation:math-shake .38s ease;border-color:var(--gold)}@keyframes math-pop{30%{transform:scale(1.025)}}@keyframes math-shake{20%{transform:translate(-7px)}55%{transform:translate(7px)}80%{transform:translate(-3px)}}.math-prompt{font-family:Bricolage Grotesque,sans-serif;font-weight:800;font-size:clamp(1.35rem,4vw,2.1rem);text-align:center;margin:0;text-wrap:balance;letter-spacing:-.01em}.math-visual{display:flex;justify-content:center}.math-feedback{min-height:1.5em;margin:0;font-weight:700;font-size:.95rem;text-align:center;color:transparent}.math-feedback.is-right{color:var(--mint)}.math-feedback.is-wrong{color:var(--gold)}.math-top{display:grid;grid-template-columns:minmax(0,1fr);gap:14px}@media(min-width:860px){.math-top{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);align-items:stretch}.math-top .math-jungle{min-height:330px}}.math-jungle{position:relative;overflow:hidden;min-height:clamp(150px,22vh,240px);border:2px solid var(--line);border-radius:20px;box-shadow:0 6px 0 var(--edge);background:var(--surface-2)}.math-jungle-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:manipulation}.math-mascot-wrap{display:flex;justify-content:center}.screen-math.is-3d .math-jungle{min-height:clamp(280px,46vh,480px)}.screen-math.is-3d .math-stage{min-height:0;padding:16px}@media(min-width:860px){.screen-math.is-3d .math-top{grid-template-columns:minmax(0,.7fr) minmax(0,1.6fr)}.screen-math.is-3d .math-top .math-jungle{min-height:460px}}.vis-word{display:flex;flex-direction:column;align-items:center;gap:6px}.vis-word-picture{font-size:clamp(2.6rem,8vw,3.6rem);line-height:1}.vis-word-line{font-family:Bricolage Grotesque,sans-serif;font-weight:800;font-size:clamp(2rem,7vw,3.2rem);letter-spacing:.04em;color:var(--ink)}.vis-word-gap{display:inline-block;min-width:1.1em;margin:0 .08em;padding:0 .12em;border-radius:10px;background:var(--gold-soft);color:var(--gold);border:2px dashed var(--gold);text-align:center}.math-say{font:inherit;font-size:.9em;cursor:pointer;vertical-align:middle;background:var(--surface-2);color:var(--ink);border:2px solid var(--line);border-radius:999px;padding:0 .35em;line-height:1.4}.math-say:hover{border-color:var(--pink)}.math-text-input{font-family:Bricolage Grotesque,sans-serif;font-weight:800;font-size:1.8rem;text-align:center;width:min(360px,100%);padding:10px 14px;background:var(--surface);color:var(--ink);border:2px solid var(--line);border-radius:14px;box-shadow:inset 0 2px 0 var(--edge)}.math-text-input:focus{outline:3px solid var(--pink);outline-offset:2px}.math-letters{display:flex;flex-wrap:wrap;justify-content:center;gap:6px}.math-letter{font:inherit;font-weight:800;font-size:1.2rem;cursor:pointer;min-width:44px;padding:8px 0;background:var(--surface);color:var(--ink);border:2px solid var(--line);border-radius:10px;box-shadow:0 3px 0 var(--edge)}.math-letter:hover{border-color:var(--pink)}.math-mascot{width:min(300px,90%);height:110px;display:block}.math-entry{display:flex;flex-direction:column;align-items:center;gap:12px}.math-choices{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));width:min(520px,100%)}.math-choice{font:inherit;font-weight:800;font-size:1.1rem;cursor:pointer;background:var(--surface);color:var(--ink);border:2px solid var(--line);border-radius:14px;padding:15px 12px;box-shadow:0 4px 0 var(--edge);transition:transform .1s,box-shadow .1s,background .12s}.math-choice:hover{transform:translateY(2px);box-shadow:0 2px 0 var(--edge);background:var(--surface-2)}.math-choice:active{transform:translateY(4px);box-shadow:none}.math-input{font-family:Martian Mono,monospace;font-weight:700;font-size:1.6rem;min-width:190px;min-height:2.1em;padding:6px 16px;text-align:center;background:var(--surface);border:2px solid var(--line);border-radius:12px;box-shadow:inset 0 2px 0 var(--edge)}.math-keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:min(280px,100%)}.math-key{font:inherit;font-weight:800;font-size:1.2rem;cursor:pointer;background:var(--surface);color:var(--ink);border:2px solid var(--line);border-radius:12px;padding:13px 0;box-shadow:0 4px 0 var(--edge);transition:transform .08s,box-shadow .08s}.math-key:hover{transform:translateY(2px);box-shadow:0 2px 0 var(--edge)}.math-key:active{transform:translateY(4px);box-shadow:none}.math-key-alt{color:var(--muted)}.math-go{grid-column:span 2;background:var(--pink);border-color:var(--pink);color:#fff}.mv-wrap{display:flex;justify-content:center;width:100%}.mv{max-width:100%;height:auto}.math-visual{width:100%;display:flex;justify-content:center}.tk-apple{fill:#e8496a}.tk-stem{fill:#7a5230}.tk-leaf{fill:#3fa564}.tk-balloon{fill:#f2a33c}.tk-string{fill:none;stroke:var(--muted);stroke-width:1.4}.tk-ball{fill:#4f8ef7}.tk-seam{fill:none;stroke:#fff;stroke-width:1.6;opacity:.75}.tk-shine{fill:#fff;opacity:.55}.mv-counter{fill:var(--pink)}.mv-counter.is-second{fill:var(--sky)}.pz-crust{fill:#e0a763}.pz-slice{fill:#fbe9c8;stroke:#d79c53;stroke-width:1}.pz-slice.is-on{fill:#f2b13e}.pz-topping{fill:#cf4630}.pz-cut{stroke:#d79c53;stroke-width:1.5}.ch-wrap{fill:var(--surface-2);stroke:var(--line);stroke-width:2}.ch-piece{fill:var(--surface);stroke:var(--line);stroke-width:1.5}.ch-piece.is-on{fill:#7b4a2d;stroke:#5c3620}.ch-shine{fill:#fff;opacity:.22}.mv-rim{fill:var(--gold-soft);stroke:var(--gold);stroke-width:3}.mv-hour-num{fill:var(--ink);font-family:Bricolage Grotesque,sans-serif;font-weight:800;font-size:13px}.mv-cell{fill:var(--surface-2);stroke:var(--line);stroke-width:1.5}.mv-cell.is-on{fill:var(--mint)}.mv-axis{stroke:var(--ink);stroke-width:2}.mv-tick{stroke:var(--muted);stroke-width:1.5}.mv-label{fill:var(--muted);font-family:Martian Mono,monospace;font-size:9px}.mv-mark{fill:var(--pink)}.mv-shape{fill:var(--surface-2);stroke:var(--ink);stroke-width:2}.mv-shape.tone-0{fill:var(--pink-soft)}.mv-shape.tone-1{fill:var(--sky-soft)}.mv-shape.tone-2{fill:var(--mint-soft)}.mv-shape.tone-3{fill:var(--gold-soft)}.mv-shape.is-on{stroke:var(--pink);stroke-width:3}.mv-face{fill:var(--surface);stroke:var(--line);stroke-width:1.5}.mv-hand{stroke:var(--ink);stroke-linecap:round}.mv-hour{stroke-width:5}.mv-minute{stroke-width:3;stroke:var(--pink)}.mv-pin{fill:var(--pink)}.mv-coin{fill:var(--gold-soft);stroke:var(--gold);stroke-width:2.5}.mv-coin.mv-grosz{fill:var(--surface-2);stroke:var(--muted)}.mv-coin.mv-note{fill:var(--mint-soft);stroke:var(--mint)}.mv-coin-label{fill:var(--gold);font-family:Martian Mono,monospace;font-size:10px;font-weight:700}.mv-slice{fill:var(--surface-2);stroke:var(--ink);stroke-width:1.5}.mv-slice.is-on{fill:var(--pink)}.mv-bar{fill:var(--sky)}.mv-ruler{fill:var(--gold-soft);stroke:var(--gold);stroke-width:2}.mv-strip{fill:var(--pink)}.mv-arc{fill:none;stroke:var(--pink);stroke-width:2.5}.mv-pan{fill:var(--surface-2);stroke:var(--line);stroke-width:2}.mv-big{fill:var(--ink);font-family:Bricolage Grotesque,sans-serif;font-weight:800;font-size:22px}.mv-expression{font-family:Martian Mono,monospace;font-size:1.2rem;font-weight:700;margin:0}.hg-cell{fill:var(--surface-2);stroke:var(--line);stroke-width:.5}.hg-cell.is-on{fill:var(--pink)}.hg-rule{stroke:var(--ink);stroke-width:1;opacity:.35}.am-part{stroke:var(--ink);stroke-width:1.5}.am-a{fill:var(--pink)}.am-b{fill:var(--sky)}.am-c{fill:var(--gold)}.am-d{fill:var(--mint)}.am-label{fill:#fff;font-family:Martian Mono,monospace;font-size:12px;font-weight:700}.py-tri{fill:var(--surface-2);stroke:var(--ink);stroke-width:2}.py-sq{stroke:var(--ink);stroke-width:1.5}.py-a{fill:var(--sky-soft)}.py-b{fill:var(--gold-soft)}.py-c{fill:var(--mint-soft)}.py-sq.is-missing{fill:var(--pink-soft);stroke:var(--pink);stroke-width:2.5;stroke-dasharray:5 4}.py-right{fill:none;stroke:var(--ink);stroke-width:1.5}.py-label{fill:var(--ink);font-family:Martian Mono,monospace;font-size:13px;font-weight:700}.pl-grid{stroke:var(--line);stroke-width:.8}.pl-axis{stroke:var(--ink);stroke-width:2}.pl-line{stroke:var(--sky);stroke-width:3;stroke-linecap:round}.pl-point{fill:var(--pink);stroke:var(--surface);stroke-width:2}.cb-front{fill:var(--sky);stroke:var(--ink);stroke-width:1.5}.cb-top{fill:var(--sky-soft);stroke:var(--ink);stroke-width:1.5}.cb-side{fill:var(--mint);stroke:var(--ink);stroke-width:1.5}.th-tube{fill:var(--surface-2);stroke:var(--line);stroke-width:2}.th-warm{fill:var(--surface)}.th-fill{fill:var(--pink)}.th-fill.is-cold{fill:var(--sky)}.th-bulb{fill:var(--pink);stroke:var(--line);stroke-width:2}.th-bulb.is-cold{fill:var(--sky)}.at-x{fill:var(--sky);stroke:var(--ink);stroke-width:1.5}.at-unit{fill:var(--gold);stroke:var(--ink);stroke-width:1.2}.at-label{fill:#fff;font-family:Bricolage Grotesque,sans-serif;font-size:17px;font-weight:800}.sp-slice{fill:var(--surface-2);stroke:var(--ink);stroke-width:1.5}.sp-slice.is-on{fill:var(--pink)}.sp-needle{stroke:var(--ink);stroke-width:3;stroke-linecap:round}.sp-pin{fill:var(--ink)}.col-num{fill:var(--ink);font-family:Martian Mono,monospace;font-size:22px;font-weight:700}.col-q{fill:var(--pink)}.col-op{fill:var(--muted);font-family:Martian Mono,monospace;font-size:20px;font-weight:700}.col-rule{stroke:var(--ink);stroke-width:2.5}.rl-mid{stroke:var(--gold);stroke-width:2.5;stroke-dasharray:4 3}.rl-value{fill:var(--pink);font-family:Martian Mono,monospace;font-size:13px;font-weight:700}.dl-value{fill:var(--ink);font-family:Martian Mono,monospace;font-size:13px;font-weight:700}.pg-shape{fill:var(--mint-soft);stroke:var(--mint);stroke-width:2.5}.pg-vertex{fill:var(--pink)}.fr-cell{fill:var(--sky);stroke:var(--surface);stroke-width:1}.ix-wrap{display:flex;flex-direction:column;align-items:center;gap:10px}.ix{max-width:100%;height:auto;touch-action:none;user-select:none}.ix-hit{cursor:pointer;transition:fill .12s}.ix-hit:hover{opacity:.85}.ix-grab{cursor:grab}.ix-grab:active{cursor:grabbing}.ix-range{width:min(460px,100%);height:auto;display:block;touch-action:none;border:2px solid var(--line);border-radius:14px;cursor:crosshair}.cr-slot{fill:var(--surface-2);stroke:var(--line);stroke-width:2}.cr-token{font-size:19px}.cr-pile{font-size:24px;cursor:grab}.cr-ghost{font-size:24px;pointer-events:none;opacity:.85}.ix-undo{font:inherit;font-size:.78rem;font-weight:700;cursor:pointer;background:transparent;color:var(--muted);border:1.5px solid var(--line);border-radius:8px;padding:4px 12px}.ix-undo:hover{color:var(--ink);border-color:var(--pink)}.tr-bed{fill:var(--surface-2);stroke:var(--line);stroke-width:1.5}.tr-fill{fill:var(--mint)}.tr-knob{fill:var(--pink);stroke:var(--surface);stroke-width:3}.tr-value{fill:var(--ink);font-weight:800;font-size:15px;font-variant-numeric:tabular-nums}.co-till{fill:var(--surface-2);stroke:var(--line);stroke-width:2;stroke-dasharray:6 5}.co-total{fill:var(--ink);font-weight:800;font-size:22px;font-variant-numeric:tabular-nums}.gm-cell{fill:var(--sky-soft);stroke:var(--sky);stroke-width:1.5}.gm-cell:hover{fill:var(--mint-soft)}.gm-cell.is-on{fill:var(--gold-soft);stroke:var(--pink);stroke-width:2.5}.gm-flag{font-size:15px;pointer-events:none}.dl-base{stroke:var(--muted);stroke-width:4;stroke-linecap:round}.dl-arm{stroke:var(--pink);stroke-width:7;stroke-linecap:round}.dl-load{font-size:17px;pointer-events:none}.bl-block{fill:var(--surface-2);stroke:var(--line);stroke-width:1.5}.bl-block:hover{stroke:var(--pink)}.bl-block.is-on{fill:var(--gold-soft);stroke:var(--pink)}.pt-cell{fill:var(--surface-2);stroke:var(--line);stroke-width:1.5}.pt-cell.ix-hit:hover{fill:var(--mint-soft);stroke:var(--pink)}.pt-cell.is-on{fill:var(--pink);stroke:var(--pink)}.pt-cell.is-locked{fill:var(--sky);stroke:var(--sky)}.pt-axis{stroke:var(--gold);stroke-width:2.5;stroke-dasharray:6 4}.sq-wrap{display:flex;flex-direction:column;align-items:center;gap:10px}.sq-hint{font-size:.78rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}.sq-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px;min-height:54px;padding:8px 14px;min-width:min(420px,90%);border:2px dashed var(--line);border-radius:14px;background:var(--surface-2)}.sq-tray{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;max-width:min(460px,100%)}.sq-chip{font:inherit;font-size:1.05rem;font-weight:800;font-variant-numeric:tabular-nums;cursor:pointer;padding:8px 14px;border-radius:12px;background:var(--surface);color:var(--ink);border:2px solid var(--line);box-shadow:0 2px 0 var(--line)}.sq-chip:hover{border-color:var(--pink)}.sq-chip.is-picked{background:var(--gold-soft);border-color:var(--pink);box-shadow:none}.sq-arrow{color:var(--muted);font-weight:800}.sq-empty{color:var(--muted);font-size:1.4rem}.math-check{min-width:160px}.math-check:disabled{opacity:.45;cursor:not-allowed}