@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:400;src:url(./lexend-latin-400-normal-CwRJVcUA.woff2) format("woff2"),url(./lexend-latin-400-normal-CHypAkT3.woff) format("woff")}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:600;src:url(./lexend-latin-600-normal-DdvlkEkX.woff2) format("woff2"),url(./lexend-latin-600-normal-DSBzZxpA.woff) format("woff")}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:700;src:url(./lexend-latin-700-normal-DqO8md6r.woff2) format("woff2"),url(./lexend-latin-700-normal-DVyJlN8t.woff) format("woff")}@font-face{font-family:STIX Two Text;font-style:normal;font-display:swap;font-weight:400;src:url(./stix-two-text-latin-400-normal-Dm29J5Fl.woff2) format("woff2"),url(./stix-two-text-latin-400-normal-rLRKR-Xb.woff) format("woff")}@font-face{font-family:STIX Two Text;font-style:italic;font-display:swap;font-weight:400;src:url(./stix-two-text-latin-400-italic-BLib6pG4.woff2) format("woff2"),url(./stix-two-text-latin-400-italic-CPbPgQcn.woff) format("woff")}:root{--bg: #f7eddc;--text: #1f1c19;--panel: #fbf5ea;--panel-2: #f0e5d3;--n500: #a28d72;--n700: #63513d;--n800: #46392b;--n900: #2d241b;--teal: #1d6670;--teal-100: #e5f3f1;--teal-200: #c6e4e0;--teal-600: #16545d;--teal-700: #11444c;--teal-800: #0c343a;--coral-300: #f8b9a5;--sunset: #f3a656;--sunset-200: #fde3c0;--shadow-sm: 0 1px 2px rgba(46, 43, 37, .14);--shadow-md: 0 3px 10px rgba(46, 43, 37, .16);--shadow-lg: 0 12px 32px rgba(46, 43, 37, .22);--font: "Lexend", system-ui, sans-serif;--math: "STIX Two Text", "Cambria Math", Cambria, Georgia, serif}*{box-sizing:border-box}html,body{margin:0;height:100%;overflow:hidden;background:var(--teal-800);font-family:var(--font);color:var(--text);-webkit-tap-highlight-color:transparent}#game-container{position:fixed;top:0;right:0;bottom:0;left:0}#game-container canvas{touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}.overlay{position:fixed;left:0;top:0;width:1280px;height:720px;transform-origin:0 0;pointer-events:none;font-size:16px;--scene-w: 860px}.overlay.stage-a{--scene-w: 1280px}.overlay>*{pointer-events:auto}.overlay [hidden]{display:none!important}.btn{min-height:44px;min-width:44px;padding:0 18px;border-radius:999px;border:2px solid transparent;font:600 15px/1 var(--font);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;white-space:nowrap}.btn.primary{background:var(--teal);color:var(--bg)}.btn.primary:hover{background:var(--teal-600)}.btn.secondary{background:var(--panel);color:var(--text);border-color:#3b2f2240}.btn.secondary:hover{background:var(--panel-2)}.btn.ghost{background:transparent;color:var(--teal-700)}.btn.ghost:hover{background:var(--teal-100)}.btn.square{padding:0;width:44px;font-size:22px}.btn:focus-visible,.icon-btn:focus-visible,.gate:focus-visible,.switch-row:focus-visible{outline:3px solid var(--sunset);outline-offset:2px}.icon-btn{width:44px;height:44px;border-radius:50%;border:0;background:var(--panel);color:var(--n800);box-shadow:var(--shadow-sm);display:grid;place-items:center;cursor:pointer}.pill{background:var(--panel);border-radius:999px;padding:0 18px;min-height:44px;display:inline-flex;align-items:center;font-size:14px;font-weight:600;box-shadow:var(--shadow-sm)}.topbar{position:absolute;left:24px;top:16px;width:calc(var(--scene-w) - 48px);display:flex;align-items:center;gap:10px;pointer-events:none}.topbar>*{pointer-events:auto}.gates{display:flex;gap:6px;margin-right:auto}.gate{position:relative;width:44px;height:44px;border-radius:50%;border:2px solid var(--n500);background:var(--panel);color:var(--text);font:600 15px var(--font);cursor:pointer;padding:0}.gate.here{background:var(--teal);border-color:var(--teal);color:var(--bg)}.gate.done:after{content:"";position:absolute;right:-3px;top:-3px;width:11px;height:11px;transform:rotate(45deg);border-radius:2px;background:#8fe3d4;border:2px solid var(--teal-700)}.gate:disabled{border-style:dashed;color:var(--n700);cursor:default;background:#fbf5eab3}.status{position:absolute;left:24px;top:72px;width:calc(var(--scene-w) - 48px);min-height:60px;display:flex;align-items:center;gap:10px;padding:8px 10px 8px 22px;border-radius:30px;background:var(--panel);box-shadow:var(--shadow-md)}.status-text{flex:1;margin:0;font-size:15px;line-height:1.35;text-wrap:pretty}.actions{display:flex;align-items:center;gap:8px}.groups{font-weight:700;font-size:14px;white-space:nowrap}.journal{position:absolute;right:16px;top:16px;bottom:16px;width:388px;border-radius:30px;background:var(--panel);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden}.journal header{display:flex;align-items:center;gap:10px;padding:18px 22px 10px}.journal h2{margin:0 auto 0 0;font-size:24px;font-weight:600}.tag{background:var(--teal-200);color:var(--teal-800);border-radius:999px;padding:4px 12px;font-size:13px;font-weight:600}.paper{position:relative;flex:1;overflow:auto;background-image:repeating-linear-gradient(180deg,transparent 0 47px,var(--teal-200) 47px 48px);background-position:0 8px}.paper:before{content:"";position:absolute;left:46px;top:0;bottom:0;width:2px;background:var(--coral-300)}.lines{list-style:none;margin:0;padding:8px 0 0}.lines li{display:flex;align-items:center;height:48px;padding-right:18px}.lines li.current{background:#c6e4e099}.lines .n{width:46px;flex:none;text-align:center;font-size:12px;color:var(--n700)}.lines .math{flex:1;padding-left:14px;font-size:26px}.lines .math.note{flex:none;padding-left:8px;font-size:18px;color:var(--teal-700)}.lines li.check .n{color:var(--teal-700);font-weight:700;font-size:11px}.lines li.check .math{font-size:22px;color:var(--teal-800)}.journal footer{padding:14px 22px 18px;font-size:13px;line-height:1.4;color:var(--n800);background:var(--panel-2)}.math{font-family:var(--math);white-space:pre;display:inline-flex;align-items:center}.math i{font-style:italic;padding-right:.04em}.frac{display:inline-flex;flex-direction:column;align-items:center;font-size:.62em;line-height:1.05;margin:0 .12em;font-style:normal}.frac .num{padding:0 .2em;border-bottom:1.5px solid currentColor}.tip{position:absolute;right:calc(1280px - var(--scene-w) + 24px);bottom:12px;width:470px;display:flex;align-items:flex-end;gap:10px}.tip .bubble{flex:1;padding:14px 16px;border-radius:22px 22px 22px 6px;background:var(--panel);box-shadow:var(--shadow-lg)}.tip p{margin:0 0 10px;font-size:15px;line-height:1.4}.row{display:flex;gap:8px;flex-wrap:wrap}.row.end{justify-content:flex-end}.pip-portrait{flex:none}.stage-b .tip{width:380px}.card{position:absolute;left:calc(var(--scene-w) / 2 - 270px);top:calc(var(--dock-top) + 6px);width:540px;padding:16px 20px;border-radius:24px;background:var(--panel);box-shadow:var(--shadow-lg);border:3px solid var(--sunset);animation:card-in .5s 1.4s both cubic-bezier(.3,1.4,.5,1)}.reduced-motion .card{animation:fade-in .3s .6s both}.card h2{margin:0 0 4px;font-size:22px;font-weight:700}.card p{margin:0 0 12px;font-size:15px;line-height:1.4}@keyframes card-in{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#0c343a73;display:grid;place-items:center}.dialog{width:520px;padding:22px;border-radius:28px;background:var(--panel);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;gap:10px}.dialog h2{margin:0 0 6px;font-size:24px;font-weight:700}.switch-row{display:flex;align-items:center;gap:14px;width:100%;min-height:64px;padding:10px 14px;border:0;border-radius:18px;background:var(--panel-2);text-align:left;font:inherit;color:inherit;cursor:pointer}.switch-text{flex:1;display:flex;flex-direction:column;gap:3px}.switch-text strong{font-size:16px}.switch-text span{font-size:13px;color:var(--n700)}.switch{flex:none;position:relative;width:56px;height:34px;border-radius:999px;background:var(--n700);transition:background .2s}.knob{position:absolute;left:4px;top:4px;width:26px;height:26px;border-radius:50%;background:#fff;transition:transform .2s}.switch-row[aria-checked=true] .switch{background:var(--teal)}.switch-row[aria-checked=true] .knob{transform:translate(22px)}.reduced-motion .switch,.reduced-motion .knob{transition:none}@media(prefers-reduced-motion:reduce){.card{animation:fade-in .3s .6s both}}