:root{--bg:#0b0f17;--bg-2:#0f1522;--panel:#121826cc;--panel-solid:#121826;--panel-border:#ffffff14;--panel-border-strong:#ffffff26;--text:#e6edf7;--text-dim:#93a1b8;--text-faint:#7c8aa1;--cyan:#22d3ee;--magenta:#f472b6;--lime:#a3e635;--amber:#fbbf24;--red:#f87171;--cyan-glow:#22d3ee55;--magenta-glow:#f472b655;--radius-s:6px;--radius-m:10px;--radius-l:14px;--blur:blur(12px);--shadow:0 10px 30px #0006, 0 1px 0 #ffffff0a inset;--font:system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif;--mono:ui-monospace, "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", monospace;--ease-out:cubic-bezier(.22, 1, .36, 1);--ease-spring:cubic-bezier(.34, 1.56, .64, 1);--dur-fast:.15s;--dur:.24s;--dur-slow:.32s;--topbar-h:52px}@media (prefers-reduced-motion:reduce){:root{--dur-fast:1ms;--dur:1ms;--dur-slow:1ms}}*,:before,:after{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;margin:0;font-size:14px;line-height:1.4;overflow:hidden}#app{position:fixed;inset:0}button,input,select,textarea{font:inherit;color:inherit}[hidden]{display:none!important}:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}.tabular{font-variant-numeric:tabular-nums}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.app{position:absolute;inset:0;overflow:hidden}.stage{touch-action:none;cursor:crosshair;outline:none;position:absolute;inset:0}.stage:focus-visible{box-shadow:inset 0 0 0 2px var(--cyan-glow);outline:none}.app[data-mode=simulate] .stage,.app[data-mode=train] .stage{cursor:grab}.stage.drop:after{content:"Drop a .world.json file to load 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6px;font-size:11px;display:inline-block}[data-tip]{position:relative}[data-tip]:hover:after,[data-tip]:focus-visible:after{content:attr(data-tip);z-index:50;white-space:pre;border-radius:var(--radius-s);background:var(--panel-solid);border:1px solid var(--panel-border-strong);color:var(--text);pointer-events:none;animation:tip-in var(--dur) var(--ease-out);padding:5px 8px;font-size:12px;position:absolute}.toolbar [data-tip]:hover:after,.toolbar [data-tip]:focus-visible:after{top:50%;left:calc(100% + 10px);translate:0 -50%}.topbar [data-tip]:hover:after,.statusbar [data-tip]:hover:after,.world-panel [data-tip]:hover:after{top:calc(100% + 8px);left:50%;translate:-50%}.statusbar [data-tip]:hover:after{top:auto;bottom:calc(100% + 8px)}@keyframes tip-in{0%{opacity:0}}.topbar{height:var(--topbar-h);z-index:20;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;padding:0 10px 0 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-6px;scale:.98}.menu.open{opacity:1;pointer-events:auto;translate:0;scale:1}.menu-item{border-radius:var(--radius-s);cursor:pointer;text-align:left;background:0 0;border:0;align-items:center;gap:10px;height:34px;padding:0 10px;display:flex}.menu-item svg{width:18px;height:18px;color:var(--text-dim)}.menu-item:hover:not(:disabled),.menu-item:focus-visible{background:#ffffff10}.menu-item:disabled{opacity:.4;cursor:not-allowed}.menu-item.danger,.menu-item.danger svg{color:var(--red)}.menu-label{flex:1}.menu-sep{background:var(--panel-border);height:1px;margin:5px 4px}.left-dock{top:calc(var(--topbar-h) + 22px);pointer-events:none;z-index:15;align-items:flex-start;gap:10px;display:flex;position:absolute;bottom:70px;left:10px}.left-dock>*{pointer-events:auto}.app:not([data-mode=edit]) .left-dock{opacity:0;pointer-events:none;translate:-20px}.app:not([data-mode=edit]) .left-dock>*{pointer-events:none}.left-dock{transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out)}.toolbar{flex-direction:column;gap:2px;padding:6px;display:flex;position:relative}.tool-indicator{transition:transform var(--dur-slow) var(--ease-spring), height var(--dur-slow) var(--ease-spring);pointer-events:none;background:linear-gradient(#22d3ee33,#22d3ee14);border:1px solid #22d3ee66;border-radius:9px;position:absolute;top:0;left:6px;right:6px;box-shadow:0 0 16px #22d3ee33}.tool-btn{z-index:1;width:40px;height:40px;color:var(--text-dim);cursor:pointer;transition:color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);background:0 0;border:0;border-radius:9px;place-items:center;display:grid;position:relative}.tool-btn:hover{color:var(--text);transform:translateY(-1px)}.tool-btn:active{transform:scale(.92)}.tool-btn.active{color:var(--cyan)}.tool-sep{background:var(--panel-border);height:1px;margin:3px 6px}.world-panel{width:280px;max-height:100%;transition:width var(--dur) var(--ease-out);flex-direction:column;display:flex;overflow:hidden}.world-panel.collapsed{width:196px}.panel-toggle{cursor:pointer;background:0 0;border:0;align-items:center;gap:8px;width:100%;height:42px;padding:0 12px;font-weight:600;display:flex}.panel-toggle svg{width:18px;height:18px;color:var(--cyan)}.panel-toggle .chev{transition:rotate var(--dur) var(--ease-out);margin-left:auto;display:inline-flex}.panel-toggle .chev svg{color:var(--text-dim)}.world-panel.collapsed .chev{rotate:-90deg}.panel-body{transition:opacity var(--dur) var(--ease-out), max-height var(--dur-slow) var(--ease-out);gap:8px;max-height:70vh;padding:0 14px 14px;display:grid;overflow-y:auto}.world-panel.collapsed .panel-body{opacity:0;max-height:0;padding-bottom:0;overflow:hidden}.panel-sub{text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin:8px 0 2px;font-size:11px;font-weight:600}.sliders{gap:2px;display:grid}.slider-row{color:var(--text-dim);justify-content:space-between;font-size:12px;display:flex}.slider-row output{color:var(--text)}input[type=range]{width:100%;accent-color:var(--cyan);margin:2px 0 6px}.seed-row{color:var(--text-dim);align-items:center;gap:8px;font-size:12px;display:flex}.seed-input{border:1px solid var(--panel-border-strong);border-radius:var(--radius-s);background:#0003;flex:1;min-width:0;height:28px;padding:0 8px}.layers{grid-template-columns:1fr 1fr;gap:4px 8px;display:grid}.check{color:var(--text-dim);cursor:pointer;align-items:center;gap:6px;font-size:12px;display:flex}.check input{accent-color:var(--cyan)}.statusbar{z-index:15;height:44px;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out);align-items:center;gap:4px;padding:0 10px;display:flex;position:absolute;bottom:12px;left:50%;translate:-50%}.app:not([data-mode=edit]) 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var(--dur) var(--ease-spring);padding:18px 22px 22px;overflow:auto;scale:.96}.overlay.open .help-dialog{scale:1}.help-head{justify-content:space-between;align-items:center;display:flex}.help-head h2{margin:0;font-size:18px}.help-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:6px 24px;display:grid}.help-group h3{text-transform:uppercase;letter-spacing:.08em;color:var(--cyan);margin:14px 0 6px;font-size:11px}.help-list{grid-template-columns:auto 1fr;gap:5px 12px;margin:0;font-size:13px;display:grid}.help-list dt{white-space:nowrap;color:var(--text-dim)}.help-list dd{color:var(--text);margin:0}.error-overlay{z-index:200;position:fixed}.error-dialog h2{color:var(--red);margin:0 0 6px}.error-msg{font-family:var(--mono)}.error-stack{border-radius:var(--radius-s);max-height:200px;color:var(--text-dim);background:#0005;padding:10px;font-size:11px;overflow:auto}.error-actions{gap:8px;display:flex}@media (max-width:1100px){.seg-btn span,.menu-btn span,.world-name{display:none}.world-panel,.world-panel.collapsed{width:230px}}@media (max-width:720px){.topbar{grid-template-columns:auto 1fr auto}.brand-name,.statusbar .stat:not(:first-of-type){display:none}}.minimap{z-index:14;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out);padding:6px;position:absolute;bottom:12px;left:10px;overflow:hidden}.minimap.hidden{opacity:0;pointer-events:none;translate:0 12px}.minimap-canvas{cursor:pointer;touch-action:none;background:#070a10cc;border-radius:9px;display:block}.app[data-mode=edit] .minimap{left:auto;right:10px}.progress-card{top:calc(var(--topbar-h) + 22px);z-index:40;opacity:0;pointer-events:none;width:260px;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out);padding:10px 12px;position:absolute;right:10px;translate:0 -8px}.progress-card.open{opacity:1;translate:0}.progress-row{color:var(--text-dim);justify-content:space-between;margin-bottom:6px;font-size:12px;display:flex}.progress-track{background:#ffffff14;border-radius:999px;height:6px;overflow:hidden}.progress-fill{border-radius:inherit;background:linear-gradient(90deg, var(--cyan), var(--magenta));transform-origin:0;height:100%;transition:transform var(--dur) var(--ease-out);transform:scaleX(0)}.dialog{flex-direction:column;gap:12px;width:min(720px,100vw - 32px);display:flex}.dialog-body{gap:10px;display:grid}.dialog-footer{justify-content:flex-end;gap:8px;display:flex}.dialog-text{color:var(--text-dim);margin:0}.dialog-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.dialog-row.options{justify-content:space-between}.slider-row.inline{align-items:center;gap:10px}.slider-row.inline input{width:160px;margin:0}.code-wrap{position:relative}.code-wrap .btn{position:absolute;top:8px;right:8px}.code,.code-input{border:1px solid var(--panel-border-strong);border-radius:var(--radius-m);width:100%;font-family:var(--mono);color:var(--text-dim);white-space:pre-wrap;word-break:break-all;background:#05080d99;margin:0;padding:10px 12px;font-size:12px}.code-input{resize:vertical;min-height:140px;color:var(--text)}.name-row span{color:var(--text-dim);font-size:12px}.name-input{border:1px solid var(--panel-border-strong);border-radius:var(--radius-s);background:#0003;flex:1;height:32px;padding:0 10px}.library-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px;max-height:55vh;display:grid;overflow-y:auto}.lib-card{border:1px solid var(--panel-border);border-radius:var(--radius-m);transition:border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);background:#ffffff06;flex-direction:column;gap:6px;padding:8px;display:flex}.lib-card:hover{border-color:var(--panel-border-strong);transform:translateY(-2px)}.lib-card.current{border-color:#22d3ee66}.lib-thumb{aspect-ratio:23/16;object-fit:cover;border-radius:var(--radius-s);background:#070a10;width:100%}.lib-thumb.empty{color:var(--text-faint);place-items:center;display:grid}.lib-name{white-space:nowrap;text-overflow:ellipsis;font-weight:600;overflow:hidden}.lib-time{color:var(--text-faint);font-size:11px}.lib-actions{justify-content:space-between;gap:6px;display:flex}.hud{top:calc(var(--topbar-h) + 22px);z-index:14;width:230px;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out);padding:10px 14px 12px;position:absolute;left:10px}.app[data-mode=edit] 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52px))}.nn-panel.collapsed .nn-body,.nn-panel.collapsed .nn-head h2{opacity:0;pointer-events:none}.panel-grip{cursor:ew-resize;z-index:2;width:6px;position:absolute;top:0;bottom:0;left:0}.panel-grip:hover{background:linear-gradient(90deg,#22d3ee33,#0000)}.nn-head{justify-content:space-between;align-items:center;padding:10px 10px 4px 14px;display:flex}.nn-head h2{letter-spacing:.02em;transition:opacity var(--dur) var(--ease-out);margin:0;font-size:14px}.nn-body{transition:opacity var(--dur) var(--ease-out);gap:10px;padding:0 14px 14px;display:grid;overflow-y:auto}.nn-stats{grid-template-columns:repeat(3,auto 1fr);gap:3px 8px;margin:0;font-size:11px;display:grid}.nn-stats dt{color:var(--text-faint)}.nn-stats dd{font-variant-numeric:tabular-nums;color:var(--text);margin:0}.nn-viz{border-radius:var(--radius-m);border:1px solid var(--panel-border);background:radial-gradient(at 50% 40%,#121c2c 0%,#070a10 100%);position:relative}.nn-canvas{display:block}.nn-tooltip{border-radius:var(--radius-s);background:var(--panel-solid);border:1px solid var(--panel-border-strong);font-family:var(--mono);white-space:nowrap;pointer-events:none;opacity:0;transition:opacity var(--dur-fast) var(--ease-out);padding:4px 8px;font-size:11px;position:absolute;top:0;left:0}.nn-tooltip.show{opacity:1}.spark-wrap{gap:4px;display:grid}.spark-label{color:var(--text-faint);font-size:11px}.sparkline{border-radius:var(--radius-s);background:#05080d80;display:block}.train-controls{gap:4px;display:grid}.train-controls .row{justify-content:space-between;align-items:center;gap:8px;margin:2px 0;display:flex}.row-label{color:var(--text-dim);font-size:12px}.chips{gap:4px;display:flex}.select{border:1px solid var(--panel-border-strong);border-radius:var(--radius-s);background:#0b0f17;height:28px;padding:0 8px;font-size:12px}.btn-grid{grid-template-columns:1fr 1fr;gap:6px;margin-top:6px;display:grid}.btn-grid .btn{justify-content:center}.btn-grid svg{width:15px;height:15px}.brain-note{color:var(--text-faint);margin:4px 0 0;font-size:11px}.hud-legend{border-top:1px solid var(--panel-border);color:var(--text-dim);cursor:pointer;flex-wrap:wrap;gap:4px 10px;margin-top:8px;padding-top:8px;font-size:11px;display:flex}.hud-legend.hidden-legend span:not(.legend-toggle){display:none}.hud-legend i{vertical-align:middle;border-radius:2px;width:8px;height:8px;margin-right:4px;display:inline-block}.nn-stats dd{white-space:nowrap}.stage-canvas{transition:opacity .38s var(--ease-out)}.stage[data-view="3d"] .stage-2d,.stage:not([data-view="3d"]) .stage-3d{opacity:0;pointer-events:none}.stage[data-view="3d"]{cursor:grab}.stage[data-view="3d"].pick-car{cursor:pointer}.camera-chips{z-index:15;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out);gap:4px;padding:5px;display:flex;position:absolute;bottom:196px;right:10px}.app:not([data-mode=edit]) .camera-chips{bottom:12px;right:320px}.camera-chips.hidden{opacity:0;pointer-events:none;visibility:hidden;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out), visibility 0s linear var(--dur);translate:0 12px}.pick-tip{z-index:18;pointer-events:none;white-space:nowrap;padding:4px 9px;font-size:12px;position:absolute;translate:12px 14px}.pick-tip[hidden]{display:none}@media (prefers-reduced-motion:reduce){.stage-canvas{transition-duration:.12s}}.view-settings{z-index:15;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out);gap:6px;padding:8px 10px;font-size:12px;display:grid;position:absolute;bottom:240px;right:10px}.app:not([data-mode=edit]) .view-settings{bottom:56px;right:320px}.view-settings.hidden{opacity:0;pointer-events:none;visibility:hidden;transition:opacity var(--dur) var(--ease-out), translate var(--dur) var(--ease-out), visibility 0s linear var(--dur);translate:0 12px}.vs-row{align-items:center;gap:8px;display:flex}.vs-label{width:46px;color:var(--text-dim)}.vs-chips{gap:4px;display:flex}.view-settings input[type=range]{width:150px}.view-settings .clock{text-align:right;width:40px}.tour{z-index:60;transition:opacity var(--dur) var(--ease-out);background:#05080e8c;position:fixed;inset:0}.tour.hidden{opacity:0;pointer-events:none;visibility:hidden}.tour-ring{border:2px solid var(--cyan);transition:left var(--dur-slow) var(--ease-out), top var(--dur-slow) var(--ease-out), width var(--dur-slow) var(--ease-out), height var(--dur-slow) var(--ease-out);pointer-events:none;border-radius:12px;position:fixed;box-shadow:0 0 0 4px #22d3ee33,0 0 24px #22d3ee66}.tour-card{transition:left var(--dur-slow) var(--ease-out), top var(--dur-slow) var(--ease-out);gap:6px;padding:14px 16px 12px;display:grid;position:fixed}.tour-count{color:var(--cyan);letter-spacing:.04em;text-transform:uppercase;font-size:11px}.tour-title{margin:0;font-size:16px}.tour-body{color:var(--text-dim);margin:0;font-size:13px;line-height:1.45}.tour-actions{align-items:center;gap:6px;margin-top:6px;display:flex}.tour-actions .spacer{flex:1}.help-foot{justify-content:flex-end;margin-top:12px;display:flex}@media (prefers-reduced-motion:reduce){.tour-ring,.tour-card{transition:none}}@keyframes mode-fade{0%{opacity:.45}to{opacity:1}}.stage.mode-fade{animation:mode-fade .32s var(--ease-out)}