:root{--bg: #0b0d17;--bg-deep: #06070f;--bg-glow-a: #16204a;--bg-glow-b: #1b1440;--panel: rgba(24, 30, 58, .62);--panel-hi: rgba(38, 48, 88, .78);--line: rgba(140, 160, 220, .16);--line-hi: rgba(160, 185, 255, .34);--text: #eef2ff;--dim: #8d97c2;--dimmer: #5b658f;--accent: #7aa2ff;--accent-deep: #4b6ee0;--accent-soft: rgba(122, 162, 255, .16);--ghost: #5ef2d0;--ghost-deep: #1fbfa0;--ghost-soft: rgba(94, 242, 208, .14);--term: #b8a6ff;--term-soft: rgba(184, 166, 255, .13);--coef: #ffc46b;--coef-soft: rgba(255, 196, 107, .13);--boom: #ffb07c;--boom-hot: #fff6e8;--win: #7dffd0;--r-sm: 10px;--r-md: 14px;--r-lg: 20px;--r-xl: 28px;--shadow-lift: 0 18px 40px -12px rgba(0, 0, 0, .72);--shadow-soft: 0 8px 24px -14px rgba(0, 0, 0, .9);--ring: 0 0 0 1px var(--line);--font-ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-math: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", Georgia, serif;--fs-math: clamp(1.45rem, 7.4vw, 2.6rem);--fs-equals: clamp(1.9rem, 9vw, 3rem);--t-fast: .14s;--t-med: .26s;--t-x: .5s;--ease: cubic-bezier(.22, .72, .24, 1);--sa-t: env(safe-area-inset-top, 0px);--sa-r: env(safe-area-inset-right, 0px);--sa-b: env(safe-area-inset-bottom, 0px);--sa-l: env(safe-area-inset-left, 0px);color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html,body,h1,h2,h3,p,figure,ul,ol{margin:0;padding:0}ul,ol{list-style:none}button,input,select,textarea{font:inherit;color:inherit}button{background:none;border:0}svg{display:block}html{height:100%;-webkit-text-size-adjust:100%}body{min-height:100vh;min-height:100dvh;font-family:var(--font-ui);color:var(--text);background-color:var(--bg);background-image:radial-gradient(120% 80% at 15% -10%,var(--bg-glow-a) 0%,transparent 60%),radial-gradient(100% 70% at 95% 105%,var(--bg-glow-b) 0%,transparent 62%),linear-gradient(180deg,var(--bg) 0%,var(--bg-deep) 100%);background-attachment:fixed;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overscroll-behavior:none;-webkit-tap-highlight-color:transparent}#app{position:relative;display:flex;flex-direction:column;gap:clamp(8px,2vw,16px);min-height:100vh;min-height:100dvh;padding:calc(var(--sa-t) + 12px) calc(var(--sa-r) + 14px) calc(var(--sa-b) + 12px) calc(var(--sa-l) + 14px);overflow:hidden;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}#app:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;opacity:0;background:radial-gradient(80% 55% at 50% 45%,rgba(125,255,208,.15) 0%,transparent 70%),radial-gradient(120% 90% at 50% 120%,rgba(94,242,208,.1) 0%,transparent 65%);transition:opacity .7s var(--ease);z-index:1}#app.win:after{opacity:1}[hidden]{display:none!important}.hud{position:relative;z-index:2;display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:4px 2px}.hud-title{font-size:clamp(.98rem,4.2vw,1.2rem);font-weight:650;letter-spacing:.01em;line-height:1.15;color:var(--text)}.hud-sub{font-size:clamp(.72rem,3.1vw,.82rem);font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--dim);margin-inline-start:auto;white-space:nowrap}.hud-actions{display:flex;align-items:center;gap:8px;flex-basis:100%;justify-content:flex-end}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 18px;border-radius:999px;font-size:.92rem;font-weight:600;letter-spacing:.01em;color:var(--text);background:linear-gradient(180deg,var(--panel-hi),var(--panel));border:1px solid var(--line-hi);box-shadow:var(--shadow-soft),inset 0 1px #ffffff0f;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;transition:transform var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease)}.btn:hover{border-color:var(--accent);box-shadow:var(--shadow-soft),0 0 0 3px var(--accent-soft)}.btn:active{transform:translateY(1px) scale(.985)}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}.btn.ghost-btn{background:transparent;border-color:var(--line);color:var(--dim);box-shadow:none;padding:0 14px}.btn.ghost-btn:hover{color:var(--text);border-color:var(--line-hi);box-shadow:0 0 0 3px #7aa2ff14}.meter{position:relative;z-index:2;height:10px;border-radius:999px;background:#0a0e1ebf;border:1px solid var(--line);box-shadow:inset 0 1px 3px #0009;overflow:visible}.meter-fill{height:100%;width:0%;border-radius:999px;background:linear-gradient(90deg,var(--accent-deep),var(--accent) 55%,var(--ghost));box-shadow:0 0 14px #5ef2d073,0 0 4px #7aa2ff99;transition:width .62s var(--ease),box-shadow var(--t-med) var(--ease)}.meter-label{position:absolute;top:calc(100% + 6px);right:2px;font-size:.68rem;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--dim);white-space:nowrap}#app.win .meter-fill{background:linear-gradient(90deg,var(--ghost),var(--win));box-shadow:0 0 22px #7dffd0b3}#app.win .meter-label{color:var(--win)}.board{position:relative;z-index:2;flex:1 1 auto;display:flex;align-items:center;justify-content:center;gap:clamp(4px,1.6vw,14px);min-height:0;margin-top:14px;padding:clamp(6px,2vw,18px) 0;font-family:var(--font-math);font-size:var(--fs-math);line-height:1.15;font-variant-numeric:lining-nums tabular-nums}.side{position:relative;flex:1 1 0;min-width:0;align-self:stretch;display:flex;align-items:center;justify-content:center;padding:clamp(10px,3vw,22px) clamp(6px,2vw,16px);border-radius:var(--r-xl);border:1px solid transparent;background:#ffffff04;transition:background-color var(--t-med) var(--ease),border-color var(--t-med) var(--ease),box-shadow var(--t-med) var(--ease),transform var(--t-med) var(--ease)}.expr-root{display:flex;flex-wrap:nowrap;align-items:center;justify-content:center;gap:2px clamp(2px,1vw,6px);max-width:100%;min-width:0;transform:scale(var(--fit, 1));transform-origin:center;transition:transform var(--t-med) var(--ease)}.equals{flex:0 0 auto;padding:0 clamp(2px,1.2vw,10px);font-family:var(--font-math);font-size:var(--fs-equals);font-weight:400;line-height:1;color:var(--accent);text-shadow:0 0 18px rgba(122,162,255,.45);transition:color var(--t-x) var(--ease),text-shadow var(--t-x) var(--ease),transform var(--t-x) var(--ease)}.tether{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none;z-index:6;overflow:visible}.tether line,.tether path{fill:none;stroke:var(--ghost);stroke-width:2;stroke-linecap:round;stroke-opacity:.75;stroke-dasharray:7 9;filter:drop-shadow(0 0 6px rgba(94,242,208,.55));animation:dash-march .9s linear infinite}@keyframes dash-march{to{stroke-dashoffset:-32}}.node{display:inline-flex;align-items:center;justify-content:center;position:relative;white-space:nowrap;transition:color var(--t-med) var(--ease),opacity var(--t-med) var(--ease),transform var(--t-med) var(--ease)}.node.add,.node.mul,.group{display:inline-flex;flex-wrap:nowrap;align-items:center;justify-content:center;gap:0 2px}.node.num{color:var(--text);font-weight:500}.node.var{font-style:italic;color:#cfd8ff}.node.var.x{--xi: clamp(0, calc((var(--x-scale, 1) - 1) / 2.2), 1);display:inline-block;margin-inline:calc((var(--x-scale, 1) - 1) * .17em);transition:margin-inline var(--t-x) var(--ease);font-weight:500;letter-spacing:.01em;color:rgb(calc(207 + 48 * var(--xi)) calc(216 + 39 * var(--xi)) 255);text-shadow:0 0 calc(6px + 16px * var(--xi)) rgba(122,162,255,calc(.25 + .55 * var(--xi))),0 0 calc(14px + 44px * var(--xi)) rgba(94,242,208,calc(.06 + .5 * var(--xi))),0 0 calc(2px + 6px * var(--xi)) rgba(255,255,255,calc(.1 + .45 * var(--xi)));transition:color var(--t-x) var(--ease),text-shadow var(--t-x) var(--ease)}.x-glyph{display:inline-block;transform:scale(var(--x-scale, 1));transform-origin:center;transition:transform var(--t-x) var(--ease);will-change:transform}.op{color:var(--dim);opacity:.85;margin:0 .22em;font-weight:400}.frac{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;vertical-align:middle;margin:0 .16em;font-size:.86em;line-height:1.05;transform:translateY(-.06em)}.frac-n,.frac-d{display:inline-flex;align-items:center;justify-content:center;padding:.06em .24em}.frac-bar{display:block;width:100%;min-width:1.1em;height:2px;border-radius:2px;background:currentColor;opacity:.72;margin:.06em 0}.paren{color:var(--dim);opacity:.7;display:inline-block;transform:scaleY(1.28);transform-origin:center;margin:0 .06em;font-weight:300}.chip{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:6px clamp(10px,2.6vw,16px);border-radius:var(--r-lg);background:linear-gradient(180deg,#ffffff0e,#ffffff05);border:1px solid var(--line);box-shadow:inset 0 1px #ffffff0d;touch-action:none;cursor:grab;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent;will-change:transform;transition:transform var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease),opacity var(--t-fast) var(--ease)}.chip:hover{transform:translateY(-1px);border-color:var(--line-hi);box-shadow:inset 0 1px #ffffff12,0 8px 22px -14px #000000e6}.chip:active{cursor:grabbing;transform:translateY(0) scale(.97)}.chip:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.chip[data-drag-role=term]{border-color:#b8a6ff61;background:linear-gradient(180deg,var(--term-soft),rgba(184,166,255,.04));box-shadow:inset 0 1px #ffffff0f,0 0 #b8a6ff00}.chip[data-drag-role=term]:hover{border-color:var(--term);box-shadow:inset 0 1px #ffffff14,0 0 0 3px #b8a6ff24}.chip[data-drag-role=coef]{border-color:#ffc46b66;border-style:solid;background:linear-gradient(180deg,var(--coef-soft),rgba(255,196,107,.04))}.chip[data-drag-role=coef] .op,.chip[data-drag-role=coef] .node.num{color:#ffe0b0}.chip[data-drag-role=coef]:hover{border-color:var(--coef);box-shadow:inset 0 1px #ffffff14,0 0 0 3px #ffc46b29}.chip.dragging,.node.dragging{opacity:.25;filter:saturate(.5);cursor:grabbing}.drag-proxy{position:fixed;top:0;left:0;pointer-events:none;z-index:80;margin:0;font-family:var(--font-math);font-size:var(--fs-math);line-height:1.15;transform-origin:center;transform:scale(1.12);filter:drop-shadow(0 16px 26px rgba(0,0,0,.7));opacity:.98}.drag-proxy .chip,.drag-proxy.chip{cursor:grabbing;background:linear-gradient(180deg,#3c4a82eb,#1c2448eb);border-color:var(--accent);box-shadow:0 0 0 3px 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#5ef2d000;filter:brightness(1)}50%{border-color:#5ef2d0f2;background-color:#5ef2d030;box-shadow:0 0 22px -2px #5ef2d08c;filter:brightness(1.18)}}.side.pulse{animation:side-pulse .62s var(--ease) both}.side.pulse:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;pointer-events:none;animation:side-pulse-sheen .62s var(--ease) both}@keyframes side-pulse{0%{background-color:#5ef2d000;border-color:#5ef2d000;box-shadow:inset 0 0 #5ef2d000;transform:scale(1)}22%{background-color:#5ef2d029;border-color:#5ef2d0e6;box-shadow:inset 0 0 0 2px #5ef2d099,0 0 34px -6px #5ef2d08c;transform:scale(1.035)}55%{background-color:#5ef2d017;border-color:#5ef2d080;transform:scale(1.008)}to{background-color:#ffffff04;border-color:transparent;box-shadow:inset 0 0 #5ef2d000;transform:scale(1)}}@keyframes side-pulse-sheen{0%{opacity:0;background:radial-gradient(60% 70% at 50% 50%,rgba(94,242,208,.35),transparent 70%)}25%{opacity:1}to{opacity:0;background:radial-gradient(110% 120% at 50% 50%,rgba(94,242,208,.2),transparent 72%)}}.annihilating{animation:annihilate .34s cubic-bezier(.3,0,.2,1) forwards;z-index:7}@keyframes annihilate{0%{color:var(--ghost);transform:scale(1);filter:brightness(1);text-shadow:0 0 10px rgba(94,242,208,.5)}35%{color:var(--boom-hot);transform:scale(1.5);filter:brightness(2.1);text-shadow:0 0 16px #fff,0 0 34px var(--boom),0 0 60px rgba(255,176,124,.75)}70%{color:var(--boom);transform:scale(1.28);opacity:.75;text-shadow:0 0 28px rgba(255,176,124,.6)}to{color:var(--boom);transform:scale(.4);opacity:0;text-shadow:none}}.caption{position:relative;z-index:2;min-height:2.6em;display:flex;align-items:center;justify-content:center;text-align:center;padding:8px 14px;border-radius:var(--r-md);font-size:clamp(.82rem,3.5vw,.98rem);font-weight:500;line-height:1.35;color:var(--dim);background:#ffffff05;border:1px solid rgba(140,160,220,.09);transition:color var(--t-med) var(--ease),border-color var(--t-med) var(--ease)}.caption:empty{opacity:0}#app.win .caption{color:var(--win);border-color:#7dffd04d;background:#7dffd00f}.tray{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 4px 2px;border-top:1px solid rgba(140,160,220,.1)}.dots{display:flex;align-items:center;flex-wrap:wrap;gap:7px;min-width:0}.dot{width:9px;height:9px;border-radius:999px;background:#8d97c242;box-shadow:inset 0 0 0 1px #8d97c229;transition:background-color var(--t-med) var(--ease),box-shadow var(--t-med) var(--ease),transform var(--t-med) var(--ease),width var(--t-med) var(--ease)}.dot.done{background:var(--ghost-deep);box-shadow:0 0 8px #5ef2d066}.dot.current{width:22px;background:var(--accent);box-shadow:0 0 12px #7aa2ffa6;transform:scale(1.05)}#app.win .equals{color:var(--win);text-shadow:0 0 18px rgba(125,255,208,.8),0 0 46px rgba(125,255,208,.45);animation:win-throb 2.1s ease-in-out infinite}#app.win .node.var.x{color:#eafff8;text-shadow:0 0 12px 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linear}.meter-fill{transition:width .12s linear}}:root{--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--bot-w: 40px;--bot-h: 46px;--bot-eye: 13px;--prog-h: 44px;--prog-fade: 22px;--t-bot: .42s}.modes{position:relative;z-index:2;display:grid;grid-template-columns:1fr;gap:10px;padding:4px 0}.mode-card{position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:4px;min-height:76px;padding:14px 16px;text-align:start;border-radius:var(--r-lg);color:var(--text);background:linear-gradient(180deg,var(--panel-hi),var(--panel));border:1px solid var(--line);box-shadow:var(--shadow-soft),inset 0 1px #ffffff0d;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;transition:transform var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease),background-color var(--t-fast) 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.mode-desc{color:var(--text);opacity:.82}.mode-card.selected:before{content:"";position:absolute;inset-block:12px;inset-inline-start:-1px;width:3px;border-radius:999px;background:linear-gradient(180deg,var(--accent),var(--ghost));box-shadow:0 0 12px #7aa2ffb3}@media (min-width: 560px){.modes{grid-template-columns:repeat(auto-fit,minmax(236px,1fr));gap:12px}.mode-card{min-height:88px;padding:16px 18px}}.programbar{position:relative;z-index:2;display:flex;align-items:center;gap:8px;min-height:calc(var(--prog-h) + 12px);padding:6px 2px;overflow-x:auto;overflow-y:hidden;scroll-snap-type:x proximity;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch;touch-action:pan-x;scrollbar-width:none;-ms-overflow-style:none;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 var(--prog-fade),#000 calc(100% - var(--prog-fade)),transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 var(--prog-fade),#000 calc(100% - var(--prog-fade)),transparent 100%)}.programbar::-webkit-scrollbar{display:none}.prog-empty{flex:0 0 auto;padding:0 10px;font-size:clamp(.74rem,3.2vw,.84rem);font-weight:500;letter-spacing:.05em;text-transform:uppercase;color:var(--dimmer);white-space:nowrap}.prog-chip{flex:0 0 auto;scroll-snap-align:center;display:inline-flex;align-items:center;gap:7px;min-height:var(--prog-h);padding:0 10px 0 8px;border-radius:var(--r-md);color:var(--text);background:linear-gradient(180deg,#ffffff0f,#ffffff05);border:1px solid var(--line);box-shadow:inset 0 1px #ffffff0d;transform-origin:center;transition:transform var(--t-med) var(--ease),opacity var(--t-med) var(--ease),filter var(--t-med) var(--ease),color var(--t-med) var(--ease),border-color var(--t-med) var(--ease),background-color var(--t-med) var(--ease),box-shadow var(--t-med) var(--ease)}.prog-idx{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;min-width:1.6em;padding:1px 4px;border-radius:var(--r-sm);font-family:var(--font-mono);font-size:.66rem;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:.02em;color:var(--dimmer);background:#0a0e1e80}.prog-label{font-family:var(--font-math);font-size:clamp(.9rem,3.8vw,1.02rem);font-weight:500;line-height:1;white-space:nowrap;font-variant-numeric:lining-nums tabular-nums}.prog-del{flex:0 0 auto;position:relative;display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;margin-inline-start:1px;border-radius:999px;font-size:.82rem;line-height:1;color:var(--dimmer);background:#0a0e1e73;cursor:pointer;touch-action:manipulation;transition:color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease)}.prog-del:before{content:"";position:absolute;top:50%;left:50%;width:44px;height:44px;transform:translate(-50%,-50%)}.prog-del:hover{color:var(--boom-hot);background:#ffb07c47}.prog-del:active{transform:scale(.9)}.prog-del:focus-visible{outline:2px solid var(--accent);outline-offset:2px}#app.mode-bot.phase-perform .prog-del{display:none}.prog-chip.done{transform:scale(.94);opacity:.5;filter:saturate(.35);color:var(--dim);border-color:#8ca0dc1a;background:#ffffff04;box-shadow:none}.prog-chip.done .prog-idx{color:var(--ghost-deep)}.prog-chip.active{transform:scale(1.1);color:#0a1020;border-color:var(--accent);background:linear-gradient(180deg,var(--accent),var(--accent-deep));box-shadow:inset 0 1px #ffffff59,0 0 0 3px var(--accent-soft),0 0 26px -4px #7aa2ffd9;animation:prog-active-pulse .9s var(--ease) infinite;z-index:3}.prog-chip.active .prog-idx{color:#0a1020;background:#ffffff8c}.prog-chip.active .prog-label{font-weight:650}@keyframes prog-active-pulse{0%,to{box-shadow:inset 0 1px #ffffff59,0 0 0 3px var(--accent-soft),0 0 22px -6px #7aa2ffb3;filter:brightness(1)}50%{box-shadow:inset 0 1px #ffffff80,0 0 0 7px #7aa2ff1a,0 0 34px -2px #5ef2d0bf;filter:brightness(1.16)}}.prog-chip.failed{color:var(--boom-hot);border-color:var(--boom);background:linear-gradient(180deg,#ffb07c42,#ffb07c14);box-shadow:inset 0 1px #ffffff24,0 0 22px -6px #ffb07ccc;animation:prog-fail-shake .46s cubic-bezier(.3,0,.2,1) 1 both}.prog-chip.failed .prog-idx{color:var(--boom-hot);background:#ffb07c66}@keyframes prog-fail-shake{0%{transform:translate(0) scale(1.06)}18%{transform:translate(-6px) scale(1.06)}36%{transform:translate(5px) scale(1.05)}54%{transform:translate(-4px) scale(1.04)}72%{transform:translate(3px) scale(1.02)}to{transform:translate(0) scale(1)}}.botrow{position:relative;z-index:2;display:flex;align-items:flex-end;justify-content:center;min-height:calc(var(--bot-h) + 34px);padding:4px 2px 0}.botrow:before{content:"";position:absolute;left:2px;right:2px;top:calc(4px + var(--bot-h));height:2px;border-radius:999px;background:linear-gradient(90deg,#8ca0dc0f,#8ca0dc38 12%,#5ef2d057 92%,#5ef2d014)}.botrow:after{content:"";position:absolute;right:4px;top:calc(4px + var(--bot-h) / 2);width:12px;height:12px;margin-top:-6px;border-radius:999px;border:2px solid var(--ghost);opacity:.55;box-shadow:0 0 14px -2px #5ef2d0b3}.bot{--bi: clamp(0, var(--bot-advance, 0), 1);position:absolute;top:4px;left:calc(var(--bi) * 100%);width:var(--bot-w);height:var(--bot-h);transform:translate(calc(var(--bi) * var(--bot-w) * -1));transition:left var(--t-bot) var(--ease),transform var(--t-bot) var(--ease);pointer-events:none;z-index:2}.bot-core{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:14px 14px 10px 10px;background:linear-gradient(180deg,#7aa2ff47,#181e3ae6 62%),linear-gradient(180deg,var(--panel-hi),var(--panel));border:1px solid var(--line-hi);box-shadow:inset 0 1px #ffffff29,inset 0 -8px 14px -10px #000000e6,var(--shadow-soft);animation:bot-bob 2.4s ease-in-out infinite}.bot-core:before{content:"";position:absolute;left:50%;bottom:100%;width:2px;height:9px;margin-left:-1px;border-radius:999px;background:linear-gradient(180deg,var(--ghost),var(--accent));box-shadow:0 0 8px #5ef2d0b3}.bot-core:after{content:"";position:absolute;left:5px;right:5px;top:100%;height:5px;margin-top:1px;border-radius:3px;background:linear-gradient(90deg,var(--dimmer),rgba(91,101,143,.35));opacity:.75}.bot-eye{position:absolute;left:50%;top:38%;width:var(--bot-eye);height:var(--bot-eye);margin-left:calc(var(--bot-eye) / -2);margin-top:calc(var(--bot-eye) / -2);border-radius:999px;background:radial-gradient(circle at 38% 34%,#fff 0%,var(--ghost) 42%,var(--ghost-deep) 100%);box-shadow:0 0 calc(6px + 16px * var(--bi)) rgba(94,242,208,calc(.45 + .5 * var(--bi))),0 0 calc(2px + 10px * var(--bi)) rgba(255,255,255,calc(.15 + .5 * var(--bi)));animation:bot-bob 2.4s ease-in-out infinite;transition:box-shadow var(--t-bot) var(--ease)}@keyframes bot-bob{0%,to{transform:translateY(0)}50%{transform:translateY(-2.5px)}}#app.mode-bot.phase-perform .bot-core{animation:bot-march .38s steps(1,end) infinite}#app.mode-bot.phase-perform .bot-eye{animation:bot-march-eye .38s ease-in-out infinite}@keyframes bot-march{0%{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-4px) rotate(3deg)}to{transform:translateY(0) rotate(-3deg)}}@keyframes bot-march-eye{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}.bot.grabbed .bot-core{animation:bot-grab .76s var(--ease) 1 both}.bot.grabbed .bot-eye{background:radial-gradient(circle at 40% 34%,#fff 0%,var(--win) 48%,var(--ghost-deep) 100%);box-shadow:0 0 26px #7dffd0f2,0 0 60px #7dffd08c}.bot.grabbed:after{content:"";position:absolute;left:50%;top:45%;width:16px;height:16px;margin:-8px 0 0 -8px;border-radius:999px;border:2px solid var(--win);animation:bot-grab-ring .76s var(--ease) 1 both}@keyframes bot-grab{0%{transform:scale(1);filter:brightness(1)}28%{transform:scale(1.28) translateY(-8px);filter:brightness(2);box-shadow:inset 0 1px #ffffff80,0 0 40px -4px #7dffd0e6}60%{transform:scale(1.08) translateY(-2px);filter:brightness(1.3)}to{transform:scale(1);filter:brightness(1.12);box-shadow:inset 0 1px #fff3,0 0 24px -8px #7dffd0b3}}@keyframes bot-grab-ring{0%{opacity:.9;transform:scale(.4)}to{opacity:0;transform:scale(4.4)}}.bot-status{max-width:100%;padding:0 8px;text-align:center;font-size:clamp(.72rem,3.1vw,.82rem);font-weight:600;letter-spacing:.07em;text-transform:uppercase;line-height:1.2;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color var(--t-med) var(--ease)}#app.mode-bot.phase-perform .bot-status{color:var(--ghost)}#app.win .bot-status{color:var(--win)}.runbar{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:6px 2px 2px}.runbar .btn.run{flex:1 1 190px;min-height:54px;padding:0 24px;font-size:clamp(.98rem,4.2vw,1.08rem);font-weight:700;letter-spacing:.03em;color:#080d1c;background:linear-gradient(180deg,var(--ghost) 0%,var(--accent) 52%,var(--accent-deep) 100%);border:1px solid rgba(255,255,255,.22);box-shadow:inset 0 1px #ffffff73,0 10px 26px -12px #000000e6,0 0 26px -6px #7aa2ffb3;animation:run-glow 2.6s ease-in-out infinite}.runbar .btn.run:hover{border-color:#fff6;filter:brightness(1.08);box-shadow:inset 0 1px #ffffff8c,0 12px 30px -12px #000000e6,0 0 38px -4px #5ef2d0cc}.runbar .btn.run:active{transform:translateY(2px) scale(.98);filter:brightness(.94);box-shadow:inset 0 2px 6px #00000059,0 4px 12px -8px #000000e6,0 0 14px -6px #7aa2ff99;animation:none}.runbar .btn.run:disabled{animation:none;filter:saturate(.35)}@keyframes run-glow{0%,to{box-shadow:inset 0 1px #ffffff73,0 10px 26px -12px #000000e6,0 0 22px -8px #7aa2ffa6}50%{box-shadow:inset 0 1px #ffffff8c,0 10px 26px -12px #000000e6,0 0 40px -2px #5ef2d0b3}}.timer{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 12px;border-radius:var(--r-md);font-family:var(--font-mono);font-size:clamp(.9rem,3.8vw,1rem);font-weight:600;font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.02em;color:var(--text);background:#0a0e1e99;border:1px solid var(--line);box-shadow:inset 0 1px 3px #00000080}#app.mode-bot.phase-perform .timer{color:var(--ghost);border-color:#5ef2d052}#app.win .timer{color:var(--win);border-color:#7dffd057}#app.mode-bot.phase-perform .board{opacity:.82;filter:saturate(.85);transition:opacity var(--t-med) var(--ease),filter var(--t-med) var(--ease)}#app.mode-bot.phase-perform .chip,#app.mode-bot.phase-perform .node{cursor:default;pointer-events:none}#app.mode-bot.phase-perform .chip{opacity:.7;border-color:#8ca0dc1f;box-shadow:none}#app.mode-bot.phase-perform .chip:hover{transform:none;border-color:#8ca0dc1f;box-shadow:none}#app.mode-bot.phase-perform .node.var.x{opacity:1}#app.mode-bot.phase-rehearse .programbar{border-block:1px solid rgba(140,160,220,.09)}@media (max-width: 360px){:root{--bot-w: 34px;--bot-h: 40px;--bot-eye: 11px;--prog-fade: 14px}.prog-label{font-size:.88rem}.runbar .btn.run{flex:1 1 100%;padding:0 16px}.timer{flex:1 1 100%}}@media (max-height: 520px){.botrow{min-height:calc(var(--bot-h) + 22px)}.runbar .btn.run{min-height:46px}}@media (prefers-reduced-motion: reduce){.bot-core,.bot-eye,#app.mode-bot.phase-perform .bot-core,#app.mode-bot.phase-perform .bot-eye,.bot.grabbed .bot-core,.bot.grabbed:after,.prog-chip.failed,.runbar .btn.run{animation:none}.prog-chip.active{animation:none;box-shadow:inset 0 1px #fff6,0 0 0 4px #7aa2ff38,0 0 20px -6px #7aa2ffb3}.prog-chip.failed{transform:none}.bot.grabbed .bot-core{box-shadow:inset 0 1px #ffffff4d,0 0 24px -6px #7dffd0cc}.bot.grabbed:after{display:none}.bot{transition:left .12s linear,transform .12s linear}}#app.mode-menu{justify-content:center;gap:clamp(22px,6vh,44px)}.modes-screen{position:relative;z-index:2;display:flex;flex-direction:column;gap:clamp(20px,5vh,40px);width:min(760px,100%);margin-inline:auto}.modes-brand{text-align:center}.modes-title{font-family:var(--font-math);font-size:clamp(2.4rem,12vw,4.2rem);line-height:1;letter-spacing:-.01em;color:var(--text)}.modes-x{color:var(--ghost);font-style:italic;text-shadow:0 0 14px rgba(94,242,208,.55),0 0 44px rgba(94,242,208,.3)}.modes-tagline{margin-top:10px;font-size:clamp(.85rem,3.4vw,1rem);color:var(--dim);text-wrap:balance}.preview-chip{display:inline-flex;align-items:center;justify-content:center;min-height:1.4em;padding:.06em .34em;border-radius:var(--r-md);font-family:var(--font-math);color:var(--ghost);background:var(--ghost-soft);border:1.5px dashed var(--ghost-deep);white-space:nowrap;pointer-events:none;opacity:0;transform:scale(.82);animation:preview-in .18s var(--ease) forwards}.preview-chip[data-preview=dest]{box-shadow:0 0 18px #5ef2d052}.preview-chip[data-preview=origin]{opacity:0;animation:preview-in-soft .18s var(--ease) forwards}@keyframes preview-in{0%{opacity:0;transform:scale(.82)}to{opacity:1;transform:scale(1)}}@keyframes preview-in-soft{0%{opacity:0;transform:scale(.82)}to{opacity:.58;transform:scale(1)}}@media (prefers-reduced-motion: reduce){.preview-chip{animation:none;opacity:1;transform:none}.preview-chip[data-preview=origin]{animation:none;opacity:.58}}.chip{position:relative}.chip[data-drag-role=term]:not(:has(.chip)):after{content:"";position:absolute;top:-13px;right:-3px;bottom:-13px;left:-3px;border-radius:inherit}.chip[data-drag-role=term]:has(.chip):before{content:"";position:absolute;top:-13px;right:-2px;bottom:-13px;left:-2px;border-radius:inherit;z-index:-1}.hud-actions{flex-wrap:wrap}.hud-actions [data-act=sound]{padding:0 12px;font-size:1rem;line-height:1}@media (max-width: 400px){.hud-actions{gap:6px}.hud-actions .btn.ghost-btn{padding:0 9px;font-size:.82rem;min-height:40px}.hud-actions [data-act=sound]{padding:0 8px}}.node.num.neg-one{padding-inline:.16em;min-width:.7em}.chip.suggested{outline:2px dashed var(--ghost);outline-offset:3px;animation:hint-pulse 1.5s var(--ease) infinite;z-index:3}@keyframes hint-pulse{0%,to{box-shadow:0 0 #5ef2d000}50%{box-shadow:0 0 18px 3px #5ef2d057}}@media (prefers-reduced-motion: reduce){.chip.suggested{animation:none;box-shadow:0 0 14px 2px #5ef2d04d}}.group[data-distribute-into]{border-radius:var(--r-md);padding-inline:.06em;transition:background-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease)}.group.drop-bracket{background:var(--coef-soft);box-shadow:inset 0 0 0 2px var(--coef),0 0 22px #ffc46b52}.group.drop-bracket>.paren{color:var(--coef)}.method{padding:clamp(14px,3.5vw,20px);border-radius:var(--r-lg);border:1px solid var(--line);background:#0a0e1e66}.method-title{font-size:.7rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ghost);margin-bottom:10px}.method-steps{display:flex;flex-direction:column;gap:8px;counter-reset:method;font-size:clamp(.84rem,3.3vw,.95rem);line-height:1.45;color:var(--dim)}.method-steps li{position:relative;padding-inline-start:30px;counter-increment:method}.method-steps li:before{content:counter(method);position:absolute;inset-inline-start:0;top:.05em;display:grid;place-items:center;width:21px;height:21px;border-radius:999px;background:var(--accent-soft);border:1px solid var(--line-hi);color:var(--accent);font-size:.72rem;font-weight:700}.method-steps b{color:var(--text);font-weight:650}.method-note{margin-top:12px;padding-top:10px;border-top:1px solid var(--line);font-size:clamp(.78rem,3vw,.88rem);color:var(--dimmer)}