: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}@property --scene-top{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --scene-right{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --scene-bottom{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --scene-left{syntax: "<length>"; inherits: false; initial-value: 0px;}html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);user-select:none;-webkit-user-select:none;overscroll-behavior:none;touch-action:manipulation;-webkit-text-size-adjust:100%}#app{position:fixed;top:0;right:0;bottom:0;left:0;touch-action:none}#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}#dock{display:contents}#topbar{position:absolute;top:calc(14px + env(safe-area-inset-top));left:calc(18px + env(safe-area-inset-left));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}@media(hover:hover){.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}#start .source{display:inline-block;margin-top:10px;color:var(--muted);font-size:14px}#start .source:hover{color:var(--text)}@media(max-width:760px)and (min-aspect-ratio:1/1)and (min-height:521px){#side{top:70px;transform:none}#sum{font-size:36px;min-width:0;padding:10px 16px}.modes{grid-template-columns:repeat(2,minmax(0,150px))}}@media(max-aspect-ratio:1/1){#hud{--gap: 12px;--dock-h: clamp(200px, 34vh, 330px);--scene-top: calc(118px + env(safe-area-inset-top)) ;--scene-bottom: calc(var(--dock-h) + 2 * var(--gap) + env(safe-area-inset-bottom))}#topbar{top:calc(10px + env(safe-area-inset-top));left:calc(var(--gap) + env(safe-area-inset-left))}#menu{width:46px;height:46px}#stars{font-size:24px}#message{top:calc(66px + env(safe-area-inset-top));left:var(--gap);right:var(--gap);width:auto;max-width:none;transform:translateY(-12px);padding:6px 16px;border-radius:20px;font-size:clamp(17px,4.4vw,26px);line-height:1.25}#message.show{transform:none}#dock{position:absolute;left:calc(var(--gap) + env(safe-area-inset-left));right:calc(var(--gap) + env(safe-area-inset-right));bottom:calc(var(--gap) + env(safe-area-inset-bottom));height:var(--dock-h);display:flex;align-items:stretch;justify-content:center;gap:10px}#side{display:contents}#sum{flex:0 1 auto;min-width:0;max-width:50%;display:flex;flex-direction:column;justify-content:center;padding:10px 14px;border-radius:20px;font-size:min(9vw,calc(var(--dock-h) / 5.4))}#sum .row{justify-content:center}#sum .chips{max-width:4.6em;gap:4px;margin:6px auto 2px}#sum .share-row{gap:10px}#keypad{flex:1 1 0;max-width:360px;grid-template-rows:repeat(3,1fr);gap:6px;padding:8px;border-radius:20px}#keypad button{height:auto;min-width:0;overflow:hidden;font-size:clamp(20px,6vw,36px);border-radius:14px}#controls{position:static;transform:none;flex:1 1 0;min-width:0;justify-content:center}#controls:has(#actions:empty){display:none}#hopper{flex-wrap:wrap;justify-content:center}#actions{flex-direction:column;flex-wrap:nowrap;width:100%;max-width:360px;gap:10px}.action{justify-content:center;text-align:center;line-height:1.15;padding:12px 18px;font-size:clamp(18px,5vw,30px)}.world-label{font-size:clamp(13px,3.4vw,22px);padding:1px 10px}.world-label.small{font-size:clamp(11px,2.8vw,16px);padding:0 7px}.world-label.bin{font-size:clamp(12px,3vw,18px);padding:0 8px}.world-label.truck{font-size:clamp(13px,3.2vw,20px);padding:0 6px}.ring-num{font-size:clamp(10px,1.6vw,14px)}#start h1{font-size:clamp(48px,15vw,120px)}.modes{grid-template-columns:repeat(2,minmax(0,150px));gap:14px}}@media(max-height:520px)and (min-aspect-ratio:1/1){#hud{--side-w: clamp(170px, 27vw, 240px);--scene-top: calc(50px + env(safe-area-inset-top)) ;--scene-right: calc(var(--side-w) + 20px + env(safe-area-inset-right));--scene-bottom: calc(74px + env(safe-area-inset-bottom)) ;--scene-left: env(safe-area-inset-left)}#topbar{top:calc(8px + env(safe-area-inset-top));left:calc(10px + env(safe-area-inset-left));gap:10px}#menu{width:42px;height:42px;font-size:22px;border-radius:12px}#stars{font-size:20px}#side{top:8px;bottom:8px;right:calc(10px + env(safe-area-inset-right));transform:none;width:var(--side-w);justify-content:center;gap:8px}#sum{font-size:min(30px,7.5vh);padding:8px 14px;min-width:0;border-radius:18px}#sum .row{justify-content:center}#sum .chips{max-width:5.5em;margin:6px auto 2px}#keypad{gap:6px;padding:8px;border-radius:18px}#keypad button{height:clamp(34px,10.5vh,48px);min-width:0;font-size:clamp(20px,6vh,28px);border-radius:12px}#message{top:calc(8px + env(safe-area-inset-top));left:calc((100% - var(--side-w) - 20px) / 2);max-width:calc(100% - var(--side-w) - 140px);padding:5px 16px;font-size:clamp(15px,4.4vh,20px);line-height:1.25}#controls{left:calc((100% - var(--side-w) - 20px) / 2);bottom:calc(10px + env(safe-area-inset-bottom));gap:6px}#hopper{min-height:14px}#hopper i{width:14px;height:14px}.action{padding:8px 24px;font-size:clamp(18px,5vh,24px)}.world-label{font-size:clamp(13px,4vh,20px);padding:1px 10px}.world-label.small{font-size:clamp(11px,3.2vh,15px);padding:0 7px}.world-label.bin{font-size:clamp(12px,3.6vh,17px);padding:0 8px}.world-label.truck{font-size:clamp(13px,3.8vh,19px);padding:0 6px}.ring-num{font-size:10px}#start h1{font-size:clamp(40px,14vh,80px)}#start p{font-size:18px;margin:4px 0 14px}.modes{grid-template-columns:repeat(4,minmax(0,130px));gap:12px}.mode{padding:8px 6px 6px;border-radius:20px}.mode b{font-size:40px}#loading{margin-top:10px}}@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}}