@media (prefers-reduced-motion:reduce){:root{--bu-fill:0s;--bu-refuse:0s;--bu-lift:0s;--bu-dead-end:0s;--bu-grow:0s;--bu-ghost:0s;--bu-verdict:0s;--bu-strike-clear:0s;--bu-test-gap:0s;--bu-beat-own:0s;--bu-beat-no-undo:0s;--bu-beat-undo:0s;--bu-beat-crowded:0s;--bu-beat-buggy-queens:0s;--bu-beat-queens:0s;--bu-beat-fast:0s;--bu-hold:0s;--bu-sheet:0s;--bu-snap:0s}}@font-face{font-family:Inter;src:url(/fonts/inter-400.woff2)format("woff2");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:Inter;src:url(/fonts/inter-600.woff2)format("woff2");font-weight:600;font-style:normal;font-display:swap}@font-face{font-family:JetBrains Mono;src:url(/fonts/jetbrains-mono-400.woff2)format("woff2");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:JetBrains Mono;src:url(/fonts/jetbrains-mono-500.woff2)format("woff2");font-weight:500;font-style:normal;font-display:swap}@font-face{font-family:Inter Fallback;src:local(Arial),local(Helvetica),local(Segoe 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env(safe-area-inset-left), env(safe-area-inset-right));--frame-top:24px;--fs-prompt:22px;--lh-prompt:1.3;--prompt-pad:8px;--gap:8px;--pill-h:52px;--bottom-min:0px;--split-gap:40px}@media (max-height:639px){.frame[data-layout=split]{--gutter:max(16px, env(safe-area-inset-left), env(safe-area-inset-right));--frame-top:8px;--fs-prompt:18px;--prompt-pad:0px;--gap:6px;--pill-h:48px;--split-gap:24px}}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--c-surface:#12141a;--c-panel:#1b1f27;--c-ink:#ece8df;--c-muted:#a8a29e;--c-line:#2c313c;--c-line-strong:#4b5262;--c-pill:#ece8df;--c-pill-ink:#12141a;--c-pill-off:#232833;--c-pill-off-ink:#a8a29e;--c-focus:#8ab4ff;--c-stage-border:#2c313c;--c-backdrop:#04060a99;--c-rule:#8ab4ff;--c-slate:#94a3b8;--c-code-region:#0e1116;--c-code-locked:#171c24}}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--c-surface:#12141a;--c-panel:#1b1f27;--c-ink:#ece8df;--c-muted:#a8a29e;--c-line:#2c313c;--c-line-strong:#4b5262;--c-pill:#ece8df;--c-pill-ink:#12141a;--c-pill-off:#232833;--c-pill-off-ink:#a8a29e;--c-focus:#8ab4ff;--c-stage-border:#2c313c;--c-backdrop:#04060a99;--c-rule:#8ab4ff;--c-slate:#94a3b8;--c-code-region:#0e1116;--c-code-locked:#171c24}*,:before,:after{box-sizing:border-box}html,body{background:var(--c-surface);color:var(--c-ink);font-family:var(--font-ui);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;margin:0;padding:0;font-size:16px;line-height:1.4}body{overflow-x:clip}button{font:inherit;color:inherit}:focus-visible{outline:3px solid var(--c-focus);outline-offset:2px}.frame{width:100%;min-height:100vh;min-height:100svh;position:relative;container-type:inline-size}.frame-main{grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto minmax(calc(var(--stage-floor) + var(--gap)), 1fr) auto;width:var(--col-w);min-height:100vh;min-height:100svh;padding:var(--frame-top) 0 0;margin:0 auto;display:grid}.prompt-zone{height:auto;overflow:visible}.stage{height:auto;min-height:0;max-height:var(--stage-max);margin-top:var(--gap)}.dock{margin-top:var(--gap);padding-bottom:calc(var(--bottom-min) + env(safe-area-inset-bottom))}.dock-content{height:var(--dock-h)}.pill-row{position:relative}.frame[data-layout=split]{--side-w:clamp(360px, 38cqw, 480px);--stage-area-h:min(100svh - 2 * var(--frame-top), 760px);--stage-w:min(600px, 100cqw - var(--side-w) - var(--split-gap) - 2 * var(--gutter), var(--stage-area-h) * 343 / var(--vb-h));--stage-h:calc(var(--stage-w) * var(--vb-h) / 343);place-items:center;display:grid}.frame[data-layout=split] .frame-main{grid-template-columns:var(--stage-w) var(--side-w);grid-template-rows:var(--bar-h) auto minmax(0, 1fr) auto;column-gap:var(--split-gap);width:auto;min-height:0;padding:var(--frame-top) var(--gutter);grid-template-areas:"stage bar""stage prompt""stage.""stage dock"}.frame[data-layout=split] .bar{grid-area:bar}.frame[data-layout=split] .prompt-zone{grid-area:prompt}.frame[data-layout=split] .stage{width:var(--stage-w);height:var(--stage-h);grid-area:stage;align-self:start;max-height:none;margin-top:0}.frame[data-layout=split] .dock{grid-area:dock}.frame[data-layout=split][data-short] .stage{top:var(--frame-top);position:sticky}.frame[data-typing] .frame-main{min-height:calc(100vh + var(--kb,0px));min-height:calc(100svh + var(--kb,0px));padding-bottom:var(--kb,0px)}.sheet-layer{z-index:100;position:fixed;inset:0}.sheet-backdrop{touch-action:none;position:fixed;inset:0}.sheet{width:min(100%,560px);max-height:min(80vh,100vh - 48px);max-height:min(80svh,100svh - 48px);padding-bottom:env(safe-area-inset-bottom);border-radius:18px 18px 0 0;margin:0 auto;position:absolute;bottom:0;left:0;right:0}.sheet-layer[data-layout=split] .sheet{width:min(560px,100vw - 64px);max-height:min(80vh,640px);max-height:min(80svh,640px);animation:sheet-pop var(--bu-sheet) var(--bu-ease);border-radius:18px;inset:50% auto auto 50%;transform:translate(-50%,-50%)}.sheet-body{overscroll-behavior:contain;overflow:auto}@keyframes sheet-pop{0%{opacity:0;transform:translate(-50%,-50%)scale(.98)}}.bar{height:calc(var(--bar-h) + env(safe-area-inset-top));padding-top:env(safe-area-inset-top);align-items:center;gap:12px;display:flex}.ticks{flex:1;grid-template-columns:repeat(12,1fr);gap:3px;height:6px;display:grid}.tick{background:var(--c-line);border-radius:3px}.tick[data-state=done]{background:var(--c-ink)}.tick[data-state=current],.tick[data-state=complete]{background:var(--c-rule)}.count{color:var(--c-muted);font-variant-numeric:tabular-nums;white-space:nowrap;font-size:16px}.more{width:var(--target);height:var(--target);color:var(--c-ink);cursor:pointer;background:0 0;border:0;border-radius:50%;margin-right:-10px;font-size:22px;line-height:1}.more:hover{background:var(--c-pill-off)}.back{width:var(--target);height:var(--target);color:var(--c-ink);cursor:pointer;background:0 0;border:0;border-radius:50%;flex:none;margin-left:-12px;margin-right:-6px;padding:0 0 3px;font-size:30px;line-height:1}.back:hover{background:var(--c-pill-off)}.back:active{transform:scale(.94)}.back--spacer{cursor:default;display:block}.back--spacer:hover{background:0 0}.more:active{transform:scale(.94)}.prompt-zone{padding-top:var(--prompt-pad);align-items:flex-start;display:flex}.prompt{font-size:var(--fs-prompt);line-height:var(--lh-prompt);letter-spacing:-.01em;text-wrap:pretty;margin:0;font-weight:600}.stage{border-radius:var(--radius);background:var(--c-panel);position:relative;overflow:hidden}.stage:after{content:"";border:1px solid var(--c-stage-border);border-radius:inherit;pointer-events:none;position:absolute;inset:0}.dock{gap:var(--gap);flex-direction:column;display:flex}.dock-content{flex:none;min-height:0;position:relative;overflow:clip}.dock-input{flex-direction:column;justify-content:flex-end;height:100%;display:flex}.dock-input[inert]{opacity:0;transition:opacity var(--bu-sheet) var(--bu-ease)}.feedback{border-radius:var(--radius);background:var(--c-panel);border:1px solid var(--c-line);opacity:0;visibility:hidden;max-height:100%;transition:transform var(--bu-sheet) var(--bu-ease), opacity var(--bu-sheet) var(--bu-ease), visibility 0s linear var(--bu-sheet);flex-direction:column;justify-content:flex-start;gap:2px;padding:10px 14px 4px;display:flex;position:absolute;bottom:0;left:0;right:0;transform:translateY(105%)}.feedback[data-risen=true]{opacity:1;visibility:visible;transition:transform var(--bu-sheet) var(--bu-ease), opacity var(--bu-sheet) var(--bu-ease);transform:translateY(0)}.feedback:focus{outline:none}.feedback[data-verdict=right]{border:1.5px solid var(--c-rule);background:var(--c-surface);color:var(--c-ink)}.feedback[data-verdict=right] .feedback-glyph{color:var(--c-rule)}.feedback[data-verdict=notYet],.feedback[data-verdict=missed]{border:1.5px solid var(--c-slate);background:var(--c-panel);color:var(--c-ink)}.feedback[data-verdict=notYet] .feedback-glyph,.feedback[data-verdict=missed] .feedback-glyph{color:var(--c-slate)}.feedback-text{--lh:20.8px;font-size:16px;line-height:var(--lh);gap:10px;margin:0;display:flex}.feedback-glyph{flex:none;font-weight:700}.links{flex-wrap:wrap;align-items:center;gap:4px 16px;display:flex}.link{min-height:var(--target);color:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;border-radius:6px;margin-left:-4px;padding:0 4px;font-weight:600;text-decoration:underline}.link:hover{text-decoration-thickness:2px}.link:active{opacity:.7}.up-nowrap{white-space:nowrap}.pill-row{flex:0 0 var(--pill-h);background:var(--c-surface);display:flex}.pill-row:before{content:"";background:var(--c-line);height:1px;transition:opacity var(--bu-sheet) var(--bu-ease);position:absolute;top:-6px;left:0;right:0}.dock[data-empty] .pill-row:before{opacity:0}.pill{width:100%;height:var(--pill-h);border-radius:var(--radius-pill);background:var(--c-pill);color:var(--c-pill-ink);font-size:var(--fs-label);cursor:pointer;transition:transform var(--bu-snap) var(--bu-ease), opacity var(--bu-snap) var(--bu-ease);border:0;flex:auto;padding:0 28px;font-weight:600}.pill:hover:not([aria-disabled=true]){box-shadow:0 2px 10px #0f172a40}.pill:active:not([aria-disabled=true]){transform:scale(.98)}.pill[aria-disabled=true]{border:1.5px solid var(--c-line-strong);color:var(--c-muted);opacity:1;cursor:default;background:0 0}.pill[aria-disabled=true] .ring{color:var(--c-muted)}.pill--link{justify-content:center;align-items:center;text-decoration:none;display:flex}.dock-result{position:absolute;top:0;left:0;right:0}.feedback-body{text-wrap:pretty;flex:1;display:block}.links--corner{float:right;height:calc(2 * var(--lh));align-items:flex-start;margin:0 -6px 0 8px}.links--corner .link{margin-top:max(calc((var(--lh) - var(--target)) / 2), -10px)}.recap{flex-direction:column;gap:4px;display:flex}.recap-line{margin:0;font-size:16px;line-height:1.3}.done-card{border:1.5px solid var(--c-rule);background:var(--c-surface);color:var(--c-ink);animation:rise var(--bu-sheet) var(--bu-ease);border-radius:14px;flex-direction:column;gap:8px;padding:14px 16px;display:flex}.done-title{align-items:baseline;gap:10px;margin:0;font-size:16px;font-weight:600;line-height:1.3;display:flex}.done-title:focus{outline:none}.done-title:focus-visible{outline:3px solid var(--c-focus);outline-offset:4px;border-radius:4px}.done-glyph{color:var(--c-rule);font-weight:700}.done-numbers{font-variant-numeric:tabular-nums;margin:0;font-size:16px;line-height:1.4}.done-link{color:var(--c-rule);align-self:flex-start;align-items:center;margin-top:-6px;margin-bottom:-10px;display:inline-flex}.sheet-backdrop{background:var(--c-backdrop);animation:fade var(--bu-sheet) var(--bu-ease)}.sheet{background:var(--c-panel);color:var(--c-ink);animation:rise var(--bu-sheet) var(--bu-ease);flex-direction:column;display:flex;box-shadow:0 -8px 30px #0f172a33}.sheet:focus{outline:none}.sheet-head{padding:8px 8px 0 var(--gutter);justify-content:space-between;align-items:center;display:flex}.sheet-title{font-size:var(--fs-label);margin:0}.sheet-close{min-height:var(--target);min-width:var(--target);cursor:pointer;background:0 0;border:0;border-radius:10px;padding:0 12px;font-weight:600}.sheet-close:hover{background:var(--c-pill-off)}.sheet-close:active{transform:scale(.97)}.sheet-body{padding:4px var(--gutter) 24px}.sheet-text{margin:0 0 8px;font-size:16px}.sheet-action{width:100%;min-height:var(--target);border:1.5px solid var(--c-line-strong);cursor:pointer;background:0 0;border-radius:12px;font-weight:600}.sheet-action:hover{border-color:var(--c-ink)}.sheet-action:active{transform:scale(.98)}.menu{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.sheet-action--close{margin-top:8px}.sheet-action--switch{justify-content:center;align-items:center;gap:12px;display:flex}.switch{background:var(--c-line-strong);width:36px;height:20px;transition:background var(--bu-snap) var(--bu-ease);border-radius:10px;flex:none;position:relative}.switch[data-on=true]{background:var(--c-rule)}.switch-knob{background:var(--c-panel);width:16px;height:16px;transition:transform var(--bu-snap) var(--bu-ease);border-radius:50%;position:absolute;top:2px;left:2px}.switch[data-on=true] .switch-knob{transform:translate(16px)}.sources{flex-direction:column;gap:14px;margin:0;padding:0;list-style:none;display:flex}.source-title{margin:0 0 4px;font-size:16px}.source-links{flex-wrap:wrap;gap:0 16px;margin:0;display:flex}.source-links a{min-height:var(--target);color:var(--c-rule);text-underline-offset:3px;align-items:center;display:inline-flex}.about-links{margin-top:4px}@keyframes rise{0%{transform:translateY(100%)}}@keyframes fade{0%{opacity:0}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.frame[data-kind=code],.frame[data-kind=program]{--dock-h:236px;--vb-h:312;--stage-floor:208px}.frame[data-kind=recap]{--dock-h:256px;--vb-h:292;--stage-floor:196px}.frame[data-kind=recap] .dock-content{height:auto;min-height:var(--dock-h)}.frame[data-kind=recap][data-short] .dock-content{min-height:0}.frame[data-short] .recap-line{font-size:15px;line-height:1.25}.frame[data-short] .recap .links{margin-top:-10px}.done-hold{flex-direction:column;justify-content:flex-end;display:flex}.frame[data-short] .done-card{gap:4px;padding:10px 14px}.frame[data-short] .done-numbers{font-size:15px;line-height:1.35}.code-dock{flex-direction:column;gap:4px;height:100%;min-height:0;display:flex}.editor{flex-direction:column;flex:auto;gap:2px;min-height:0;display:flex}.bu-tray:focus-visible,.ed-scroll:focus-visible{outline:2px solid var(--c-focus);outline-offset:-2px}.bu-tray--code[data-peek]>.bu-chip{animation:.6s ease-in-out bu-peek}@keyframes bu-peek{50%{transform:translate(-40px)}}.ed-scroll{overflow-anchor:none;border:1px solid var(--c-line);background:var(--c-code-locked);cursor:text;border-radius:10px;flex:auto;min-height:0;max-height:148px;position:relative;overflow:hidden auto}.editor[data-locked] .ed-scroll{cursor:default}.ed-line{display:flex}.ed-num,.ed-code,.ed-region,.ed-error,.number-input{font-variant-ligatures:none;font-feature-settings:"calt" 0, "liga" 0}.ed-num,.ed-code,.ed-region{font-family:var(--font-mono);font-variant-numeric:tabular-nums;tab-size:4;letter-spacing:0;margin:0;font-size:16px;font-weight:400;line-height:24px}.ed-num{text-align:right;color:var(--c-muted);-webkit-user-select:none;user-select:none;flex:0 0 26px;padding-right:4px}.ed-code{white-space:pre-wrap;overflow-wrap:anywhere;flex:1 1 0;min-width:0;padding:0 6px}.ed-locked .ed-code{padding-left:calc(6px + var(--ed-hang,2ch));text-indent:calc(-1 * var(--ed-hang,2ch));color:var(--c-muted)}.ed-region-row{background:var(--c-code-region);min-height:44px;box-shadow:inset 2px 0 0 var(--c-rule);align-items:center;display:flex}.ed-region-box{flex:auto;min-width:0;position:relative}.ed-mirror .ed-code{color:#0000}.ed-region{width:calc(100% - 26px);height:100%;color:var(--c-ink);white-space:pre-wrap;overflow-wrap:anywhere;resize:none;background:0 0;border:0;border-radius:0;outline:none;padding:0 6px;position:absolute;inset:0 0 0 26px;overflow:hidden}.ed-region:focus-visible{outline:2px solid var(--c-focus);outline-offset:-2px}.editor[data-locked] .ed-region-row{min-height:0;box-shadow:inset 2px 0 0 var(--c-slate)}.editor[data-above] .ed-scroll:before{content:"";z-index:1;background:var(--c-slate);pointer-events:none;height:2px;margin-bottom:-2px;display:block;position:sticky;top:0}.ed-status{min-height:24px;color:var(--c-muted);align-items:center;gap:8px;margin:0;font-size:16px;display:flex}.ed-error{max-height:88px;font-family:var(--font-mono);color:var(--c-slate);white-space:pre-wrap;overflow-wrap:anywhere;flex:none;margin:0;font-size:16px;line-height:22px;overflow:auto}.ed-error-msg{color:var(--c-ink)}.ed-error[data-more]{-webkit-mask-image:linear-gradient(#000 calc(100% - 8px),#0000);mask-image:linear-gradient(#000 calc(100% - 8px),#0000)}.ed-error-code{vertical-align:top;white-space:pre;word-break:normal;max-width:100%;display:inline-block;overflow-x:auto}.ed-error-code:focus-visible{outline:2px solid var(--c-focus);outline-offset:-2px}.dock-result .ed-error{background:var(--c-surface);padding:0 4px}.ring{border:2px solid;border-right-color:#0000;border-radius:50%;flex:none;width:14px;height:14px;animation:.9s linear infinite spin;display:inline-block}.ring--pill{vertical-align:-2px;margin-right:8px}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.ring{animation:none}}.number-dock{flex-direction:column;justify-content:flex-end;gap:6px;height:100%;display:flex}.number{flex-direction:column;gap:4px;display:flex}.number-label{font-size:var(--fs-label);font-weight:600}.number-input{border:1px solid var(--c-line-strong);border-left:3px solid 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