:root{--bg: #0e1426;--panel: rgba(18, 26, 50, .82);--panel-edge: rgba(120, 150, 230, .25);--text: #eef3ff;--muted: #8d9bc4;--tens: #ff8c42;--ones: #4ee6ff;--good: #7cff8a;--hint: #ffd166;--pink: #ff5fa2;font-family:"Baloo 2",system-ui,sans-serif;color:var(--text)}*{box-sizing:border-box}html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);user-select:none;-webkit-user-select:none}#app{position:fixed;top:0;right:0;bottom:0;left:0}#app canvas{display:block}.labels{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.world-label{font-size:clamp(18px,2.2vw,28px);font-weight:800;padding:2px 14px;border-radius:999px;background:var(--panel);border:2px solid currentColor;white-space:nowrap}.world-label.tens{color:var(--tens)}.world-label.ones{color:var(--ones)}.world-label.pink{color:var(--pink)}.world-label.small{font-size:clamp(13px,1.4vw,18px);padding:0 10px}.world-label.bin{font-size:clamp(16px,1.8vw,22px);padding:0 12px}.world-label.truck{font-size:clamp(18px,2vw,26px);min-width:1.8em;text-align:center;padding:0 8px}.world-label.bump{animation:bump .4s ease-out}.ring-num{font-size:14px;font-weight:800;color:var(--muted);opacity:.6}.ring-num.lit{color:var(--ones);opacity:1;text-shadow:0 0 8px rgba(78,230,255,.8)}#hud{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none}#hud>*{pointer-events:auto}#topbar{position:absolute;top:14px;left:18px;display:flex;align-items:center;gap:14px}#menu{width:48px;height:48px;border-radius:14px;font-size:26px;font-weight:800;background:var(--panel);border:1px solid var(--panel-edge)}#menu[hidden]{display:none}#stars{font-size:28px;color:var(--hint);text-shadow:0 0 12px rgba(255,209,102,.6);letter-spacing:2px}#side{position:absolute;top:50%;right:clamp(16px,4vw,56px);transform:translateY(-50%);display:flex;flex-direction:column;align-items:stretch;gap:12px}#sum{padding:18px 26px 14px;background:var(--panel);border:1px solid var(--panel-edge);border-radius:24px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);font-size:clamp(40px,5.5vw,72px);font-weight:800;line-height:1.05;font-variant-numeric:tabular-nums;min-width:220px}#sum:empty{display:none}#sum .row{display:grid;grid-template-columns:.8em 1em 1em;gap:.12em;text-align:center}#sum .head span{font-size:.38em;line-height:1.6}#sum .head .t{color:var(--tens)}#sum .head .o{color:var(--ones)}#sum .t{color:var(--tens)}#sum .o{color:var(--ones)}#sum .op{color:var(--muted)}#sum .carry{height:.55em}#sum .carry span{font-size:.5em;line-height:1.1}#sum .rule{height:5px;border-radius:3px;background:var(--text);margin:6px 0 4px;opacity:.85}#sum .answer span{opacity:.35}#sum .answer span.filled{opacity:1;animation:bump .25s ease-out}#carry{display:inline-block;color:var(--tens)}#carry.pop{animation:carry-pop .7s cubic-bezier(.2,1.6,.4,1)}#carry.pulse{animation:pulse .5s ease-in-out 4}#sum .struck{position:relative;opacity:.5}#sum .struck:after{content:"";position:absolute;left:10%;right:10%;top:50%;height:.09em;background:var(--pink);transform:rotate(-20deg);border-radius:1em}#sum .borrowed{font-size:.45em;color:var(--tens);vertical-align:top;display:inline-block;margin-right:.02em;position:relative;top:.15em}#sum .borrowed.pulse{animation:pulse .5s ease-in-out 4}#sum .o.bump{animation:bump .4s ease-out;display:inline-block}#sum .eq{display:flex;justify-content:center;gap:.25em}#sum .eq-sub{font-size:.3em;color:var(--muted);text-align:center;margin-top:2px}#sum .chips{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin:10px 0 4px;max-width:6.5em}#sum .chip{font-size:.38em;min-width:1.7em;padding:2px 8px;text-align:center;border-radius:10px;border:2px dashed var(--muted);color:var(--muted)}#sum .chip.done{border:2px solid var(--ones);color:#062431;background:var(--ones)}#sum .chip.bump{animation:bump .35s ease-out}#sum .share-row{display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:.42em;color:var(--ones);margin-top:8px}#sum .share-row.pink{color:var(--pink)}#sum .slot{font-size:1.9em;min-width:1.4em;text-align:center;cursor:pointer;border-radius:12px;border:3px solid transparent;opacity:.4}#sum .slot.filled{opacity:1}#sum .slot.active{border-color:currentColor;opacity:1}#message{position:absolute;top:18px;left:calc(50% - 130px);transform:translate(-50%,-20px);opacity:0;padding:10px 26px;border-radius:999px;background:var(--panel);border:2px solid var(--panel-edge);font-size:clamp(18px,2.4vw,30px);font-weight:700;max-width:min(64vw,820px);width:max-content;text-align:center;transition:opacity .25s,transform .25s}#message.show{opacity:1;transform:translate(-50%)}#message.good{border-color:var(--good);color:var(--good)}#message.hint{border-color:var(--hint);color:var(--hint)}#controls{position:absolute;bottom:26px;left:50%;transform:translate(-50%);display:flex;flex-direction:column;align-items:center;gap:10px}#hopper{display:flex;gap:6px;min-height:18px}#hopper i{width:18px;height:18px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,var(--ones) 45%,#0b6c86);box-shadow:0 0 10px #4ee6ff99}#hopper i.pink{background:radial-gradient(circle at 35% 30%,#fff,var(--pink) 45%,#861a4c);box-shadow:0 0 10px #ff5fa299}#actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}button{font:inherit;color:inherit;cursor:pointer;border:none;-webkit-tap-highlight-color:transparent}.action{--c: var(--ones);--c-light: #8ff1ff;--c-dark: #138aa6;--ink: #062431;display:flex;align-items:center;gap:12px;padding:12px 34px;font-size:clamp(22px,2.8vw,34px);font-weight:800;border-radius:999px;color:var(--ink);background:linear-gradient(180deg,var(--c-light),var(--c));box-shadow:0 6px 0 var(--c-dark),0 0 30px color-mix(in srgb,var(--c) 45%,transparent);transition:transform .08s,box-shadow .08s,opacity .2s}.action.tens{--c: var(--tens);--c-light: #ffb27a;--c-dark: #b2541a;--ink: #2a1200}.action.pink{--c: var(--pink);--c-light: #ff9cc6;--c-dark: #a3245d;--ink: #2d0716}.action:active:not(:disabled){transform:translateY(5px);box-shadow:0 1px 0 var(--c-dark)}.action:disabled{opacity:.45;cursor:default}.action.pulse:not(:disabled){animation:breathe 1.2s ease-in-out infinite}.action .count{opacity:.7}#keypad{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:12px;background:var(--panel);border:1px solid var(--panel-edge);border-radius:22px}#keypad[hidden]{display:none}#keypad button{width:100%;height:clamp(44px,7vh,62px);min-width:48px;font-size:clamp(24px,3.4vh,32px);font-weight:800;border-radius:16px;background:#24305a;box-shadow:0 5px #141b36;transition:transform .06s,box-shadow .06s}#keypad button:active{transform:translateY(4px);box-shadow:0 1px #141b36}#keypad .ok{background:#2f9e57;box-shadow:0 5px #1b6338}#keypad .back{background:#5a2f45;box-shadow:0 5px #38192a}#start{position:fixed;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:radial-gradient(circle at 50% 40%,#1e2c5abf,#080c18f0);transition:opacity .5s;padding:16px}#start.hide{opacity:0;pointer-events:none}#start .card{text-align:center}#start h1{margin:0;font-size:clamp(56px,10vw,120px);font-weight:800;line-height:1;color:var(--ones);text-shadow:0 0 30px rgba(78,230,255,.5)}#start h1 span{color:var(--tens);text-shadow:0 0 30px rgba(255,140,66,.5)}#start p{font-size:clamp(20px,2.6vw,30px);color:var(--text);margin:12px 0 28px}#start b.o{color:var(--ones)}#start b.t{color:var(--tens)}.modes{display:grid;grid-template-columns:repeat(4,minmax(0,150px));gap:18px;justify-content:center}.mode{--c: var(--ones);--c-dark: #138aa6;display:flex;flex-direction:column;align-items:center;gap:2px;padding:14px 10px 10px;border-radius:26px;background:var(--panel);border:3px solid var(--c);box-shadow:0 7px 0 var(--c-dark),0 0 30px color-mix(in srgb,var(--c) 35%,transparent);transition:transform .1s}.mode b{font-size:clamp(48px,6vw,72px);line-height:1;color:var(--c);text-shadow:0 0 20px var(--c)}.mode span{font-size:clamp(16px,1.8vw,22px);font-weight:700}.mode:hover:not(:disabled){transform:translateY(-4px)}.mode:active:not(:disabled){transform:translateY(4px)}.mode:disabled{opacity:.4}.mode.sub{--c: var(--pink);--c-dark: #a3245d}.mode.mul{--c: var(--tens);--c-dark: #b2541a}.mode.div{--c: var(--good);--c-dark: #2f9e57}#loading{display:block;margin-top:18px;color:var(--muted);font-size:16px}@media(max-width:760px),(max-aspect-ratio:1/1){#side{top:70px;transform:none}#sum{font-size:36px;min-width:0;padding:10px 16px}.modes{grid-template-columns:repeat(2,minmax(0,150px))}}@keyframes bump{0%{transform:scale(1)}40%{transform:scale(1.25)}to{transform:scale(1)}}@keyframes carry-pop{0%{transform:translateY(1.5em) scale(.2);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}@keyframes pulse{50%{transform:scale(1.5);text-shadow:0 0 18px var(--tens)}}@keyframes breathe{50%{transform:scale(1.06)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}