@layer base, layout, components, board, utilities;

@layer base {
  :root{color-scheme:light;--paper:#f5f2e9;--paper-light:#fffcf5;--ink:#262922;--muted:#74766b;--line:#d8d8ca;--cobalt:#2b45e5;--cobalt-deep:#2035b5;--cobalt-wash:#e9edff;--amber:#f5b640;--amber-light:#fff0be;--green:#506f4c;--radius:12px;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;font-synthesis:none;-webkit-font-smoothing:antialiased}
  *{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink)}button,input,select,textarea{font:inherit;color:inherit}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit}button:disabled{cursor:default}button,select,input,textarea{touch-action:manipulation}h1,h2,h3,p{margin:0}h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:400}h3{font-size:.875rem;font-weight:650}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--cobalt);outline-offset:4px}button:disabled{opacity:.38}button[hidden],[hidden]{display:none!important}svg{display:block}textarea{resize:vertical}::selection{background:#d7ddff}summary{cursor:pointer;min-height:44px}dialog::backdrop{background:#26292270;backdrop-filter:blur(4px)}
}
@layer layout {
  .page-shell{max-width:1168px;padding:0 40px;margin:0 auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:103px;border-bottom:1px solid var(--line)}.header-end{display:flex;align-items:center;gap:28px}.intro{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:end;padding:53px 0 48px}.intro h1{font-size:clamp(3rem,5.2vw,4.5rem);line-height:1.04;letter-spacing:-.055em;margin:19px 0 20px}.intro h1 em{font-weight:400;color:var(--cobalt)}.intro-description{font-size:1rem;line-height:1.65;color:#66695e}.intro-action{padding:0 0 4px 20px;max-width:440px}.intro-note{display:flex;gap:17px;align-items:flex-start;margin-bottom:25px}.intro-note p{font-size:.93rem;line-height:1.7}.entry-actions{display:flex;gap:10px;flex-wrap:wrap}.intro-footnote{font-size:.75rem;color:var(--muted);margin-top:14px}.workbench{border:1px solid var(--line);border-radius:16px;background:#faf8f1;box-shadow:0 4px 0 #eae8de;overflow:hidden;scroll-margin-top:16px}.workbench-top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:17px 24px;border-bottom:1px solid var(--line)}.board-navigation{padding:0 24px;background:var(--paper);border-bottom:1px solid var(--line)}.board-tabs{display:flex;gap:8px;flex-wrap:wrap;align-items:stretch;padding:10px 0}.puzzle-heading{display:flex;justify-content:space-between;gap:24px;padding:28px 28px 14px;align-items:flex-start}.puzzle-heading h2{font-size:2rem;line-height:1.15;letter-spacing:-.035em;margin:8px 0 10px}.puzzle-description{font-size:.875rem;line-height:1.6;max-width:600px;color:#6c6f64}.workspace-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,1fr);gap:40px;align-items:start;padding:12px 28px 27px}.board-column{min-width:0}.tools-column{min-width:0;padding-top:4px}.feedback-section{display:grid;grid-template-columns:.9fr 1fr;gap:80px;padding:65px 4px 58px}.feedback-heading{position:relative}.feedback-heading h2{font-size:2.5rem;letter-spacing:-.045em;line-height:1.1;margin:15px 0}.feedback-heading>p:last-of-type{max-width:310px;color:var(--muted);font-size:.875rem;line-height:1.7}.feedback-doodle{display:block;font-size:4rem;font-family:Georgia,serif;color:var(--cobalt);transform:rotate(12deg);margin-left:260px;line-height:1.1}.site-footer{display:flex;align-items:center;gap:28px;flex-wrap:wrap;border-top:1px solid var(--line);padding:25px 0 32px}.site-footer>p{font-size:.75rem;color:var(--muted)}.privacy-details{margin-left:auto;font-size:.75rem;max-width:500px}.privacy-details summary{display:flex;align-items:center;justify-content:flex-end;text-decoration:underline;text-underline-offset:4px}.privacy-details[open]{flex-basis:100%;margin-left:0}.privacy-details[open] summary{justify-content:flex-start}.privacy-details p{line-height:1.7;margin-bottom:10px}
  @media(min-width:1200px){.page-shell{padding:0 40px}.workspace-grid{grid-template-columns:420px 1fr;gap:60px;padding-left:40px;padding-right:40px}.puzzle-heading{padding-left:40px;padding-right:40px}.objective-line{margin-left:40px!important;margin-right:40px!important}}
  @media(max-width:760px){.page-shell{padding:0 20px}.site-header{min-height:80px}.header-end{gap:14px}.intro{gap:24px;padding:32px 0 30px}.intro h1{font-size:3rem}.intro-action{padding-left:0}.entry-actions{display:grid}.entry-actions .button{justify-content:space-between}.intro-note{gap:10px}.intro-note .note-number{display:none}.workspace-grid{grid-template-columns:minmax(0,1fr) minmax(0,.82fr);gap:22px;padding:12px 20px 24px}.puzzle-heading{padding:24px 20px 12px}.workbench-top,.board-navigation{padding-left:20px;padding-right:20px}.feedback-section{gap:32px}.feedback-doodle{margin-left:150px}.edition{font-size:.65rem}.objective-line{margin-left:20px!important;margin-right:20px!important}}
  @media(max-width:600px){.page-shell{padding:0 16px}.header-end{gap:8px}.site-header{min-height:76px}.header-end>.edition{display:none}.intro{display:block;padding:29px 0 30px}.intro-copy{position:relative}.intro h1{font-size:3.2rem;line-height:1.04;margin:16px 0 16px}.intro-description{font-size:.9rem;line-height:1.6}.intro-description br{display:none}.intro-action{max-width:none;margin-top:23px}.intro-note{border-left:2px solid var(--cobalt);padding-left:13px;margin-bottom:17px}.intro-note p{font-size:.8rem;line-height:1.65}.intro-note p br:nth-of-type(2){display:none}.entry-actions{display:flex;gap:8px}.entry-actions>.button{flex:1;padding:12px;gap:12px;font-size:.82rem}.intro-footnote{font-size:.7rem;margin-top:12px}.workbench{border-radius:12px}.workbench-top{padding:13px 14px;align-items:flex-start}.workbench-top>.eyebrow{white-space:nowrap;font-size:.6rem;padding-top:3px}.local-badge{font-size:.6rem!important;max-width:155px;justify-content:flex-end;text-align:right}.board-navigation{padding:0 12px}.board-tabs{gap:5px;padding:9px 0}.puzzle-heading{padding:21px 16px 10px;gap:12px}.puzzle-heading h2{font-size:1.7rem;margin-top:8px}.puzzle-description{font-size:.8rem}.score-badge{padding-top:3px}.score-badge>span:first-child{font-size:1.5rem!important}.score-badge>span:last-child{font-size:.5rem!important}.workspace-grid{display:flex;flex-direction:column;gap:25px;padding:10px 12px 22px}.board-column,.tools-column{width:100%}.board-card{padding:11px!important}.board-mount{max-width:360px;margin:auto}.board-caption{font-size:.6rem!important}.tools-column{padding:0 3px}.kit-section{padding-bottom:20px}.inspector-section{border-top:1px solid var(--line);padding-top:18px}.objective-line{margin:0 16px!important;gap:7px!important;flex-wrap:wrap;font-size:.72rem!important}.objective-note{margin-left:0!important;width:100%;padding-left:23px;font-size:.68rem}.status-panel{margin-top:15px}.run-details>summary{padding:15px 16px!important;gap:8px!important;align-items:flex-start!important;flex-wrap:wrap}.summary-detail{font-size:.65rem!important}.details-content{display:block!important;padding:0 16px 20px!important}.playback-settings{max-width:none!important}.trace-section{margin-top:20px!important}.feedback-section{display:block;padding:40px 1px 35px}.feedback-heading h2{font-size:2.1rem;margin:13px 0}.feedback-heading>p:last-of-type{max-width:none}.feedback-doodle{display:none}.feedback-form{margin-top:23px}.site-footer{gap:12px 20px;padding:21px 0}.site-footer>p{font-size:.65rem}.privacy-details{margin-left:0;width:100%;max-width:none;font-size:.65rem}.privacy-details summary{justify-content:flex-start;min-height:32px}.info-dialog{padding:23px!important}.info-dialog h2{font-size:2.3rem!important}.dialog-header>.eyebrow{font-size:.6rem}.dialog-lede{font-size:.95rem!important}.rules-steps{margin-top:23px!important}.piece-rules article{gap:14px!important}}
  @media(max-width:350px){.page-shell{padding:0 12px}.intro h1{font-size:2.9rem}.entry-actions>.button{font-size:.75rem;padding:11px 10px;gap:6px}.workspace-grid{padding-left:0;padding-right:0}.board-card{border-left:0!important;border-right:0!important;border-radius:0!important;padding:11px 10px!important}.tools-column{padding:0 14px}.board-caption{padding:0 3px}.reaction-controls,.run-note,.status-panel,.result-panel{margin-left:14px;margin-right:14px}.reaction-controls{gap:7px!important}.reaction-controls .button{font-size:.78rem;padding:12px 10px}.workbench-top{gap:7px;padding-left:12px;padding-right:12px}.local-badge{font-size:.55rem!important;max-width:133px}.board-navigation{padding:0 8px}.puzzle-heading{padding-left:14px;padding-right:14px}.score-badge{min-width:47px!important}.objective-line{margin-left:14px!important;margin-right:14px!important}.intro-note p{font-size:.75rem}}
}
@layer components {
  .wordmark{font-size:1.9rem;line-height:1;letter-spacing:-.075em;font-weight:650;text-decoration:none;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}.wordmark-spark{font-size:1.4rem;color:var(--cobalt);margin:0 2px;line-height:1}.wordmark.small{font-size:1.35rem;gap:3px}.wordmark.small .wordmark-spark{font-size:1.05rem}.edition,.eyebrow{text-transform:uppercase;font-size:.65rem;font-weight:650;letter-spacing:.12em;line-height:1.4}.edition{color:var(--muted);letter-spacing:.1em}.eyebrow{display:flex;align-items:center;gap:9px}.tiny-diamond{display:inline-block;width:7px;height:7px;transform:rotate(45deg);background:var(--cobalt)}.button{min-height:44px;border:1px solid transparent;border-radius:7px;padding:11px 16px;background:none;display:inline-flex;align-items:center;justify-content:center;gap:10px;font-size:.8rem;font-weight:600;line-height:1.35;transition:background .15s,border-color .15s,transform .15s;white-space:normal;text-align:center}.button:not(:disabled):active{transform:translateY(1px)}.button.primary,.launch-button{background:var(--cobalt);color:#fff;border-color:var(--cobalt);box-shadow:0 2px 0 #1b2f9a}.button.primary:hover,.launch-button:hover{background:var(--cobalt-deep);border-color:var(--cobalt-deep)}.button.secondary{border-color:#cfd1c5;background:#fcfaf5}.button.secondary:not(:disabled):hover{background:#edeee4;border-color:#bfc1b3}.button.text-button{padding-left:7px;padding-right:7px}.button.text-button:not(:disabled):hover{background:#eaeae0}.button.compact{font-size:.7rem;min-height:44px;padding:8px 4px}.button.icon-button{padding:5px;width:44px;font-size:1.7rem;flex-shrink:0}.question-icon{border:1px solid currentColor;width:17px;height:17px;border-radius:50%;font-size:.65rem;display:inline-flex;align-items:center;justify-content:center}.note-number{font-family:Georgia,serif;font-size:1.65rem;color:var(--cobalt);line-height:1.5}.local-badge{font-size:.65rem;color:var(--muted);display:flex;align-items:center;gap:6px;line-height:1.5}.local-badge>span:first-child{width:5px;height:5px;background:var(--green);border-radius:50%;flex-shrink:0}.board-tabs button{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:7px 12px;border:1px solid transparent;border-radius:6px;background:none;color:#74766c;font-size:.75rem;font-weight:550;line-height:1.3;flex:1 1 auto;justify-content:center}.board-tabs button:hover{background:#eeece2}.board-tabs button[aria-current="true"],.board-tabs button[aria-selected="true"],.board-tabs button.active{background:#fffdf8;border-color:var(--line);color:var(--cobalt);box-shadow:0 2px 2px #2d342108}.board-tabs button .tab-number{font-size:.6rem;color:var(--muted)}.board-tabs button .tab-check{font-size:.65rem;color:var(--green)}.score-badge{display:flex;align-items:center;gap:8px;min-width:76px;padding-top:9px}.score-badge>span:first-child{font-family:Georgia,serif;font-size:2rem;line-height:1;letter-spacing:-.04em;color:var(--cobalt)}.score-badge>span:last-child{text-transform:uppercase;font-size:.55rem;font-weight:650;letter-spacing:.06em;line-height:1.5;color:var(--muted)}.objective-line{display:flex;gap:8px;align-items:center;font-size:.75rem;line-height:1.5;margin:0 28px}.objective-line strong{font-weight:550}.goal-mini{width:13px;height:13px;border:2px solid #7b8271;border-radius:50%;display:inline-block;flex-shrink:0}.objective-note{color:var(--muted);margin-left:auto;font-size:.65rem}.board-card{border:1px solid #d7dacd;background:#e9ecdf;border-radius:10px;padding:15px;position:relative}.board-caption{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:.63rem;line-height:1.5;color:#727765;margin-bottom:13px}.board-caption>span:first-child{display:flex;align-items:center;gap:5px}.live-dot{width:5px;height:5px;border-radius:50%;background:#7a8870}.board-caption:has(+.board-mount .running) .live-dot{background:var(--amber)}.board-key{display:flex;justify-content:center;gap:19px;padding-top:12px;color:#7b806e;font-size:.6rem}.board-key>span{display:flex;align-items:center;gap:4px}.board-key svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:1.6}.board-key>span:first-child svg{fill:#697a5b;stroke:none}.board-key>span:last-child svg{fill:#c3c8b6;stroke:none}.reaction-controls{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.reaction-controls>.launch-button{flex:1;font-size:.87rem;font-weight:600;min-height:49px;justify-content:center}.launch-icon{font-size:1.3rem;line-height:1}.reaction-controls>.button.secondary{flex:1}.run-note{font-size:.63rem;line-height:1.65;color:var(--muted);text-align:center;margin-top:10px}.status-panel{display:flex;gap:12px;padding:15px 0 0;line-height:1.5}.status-mark{color:var(--cobalt);font-size:1.5rem;line-height:1}.status-panel strong{font-size:.8rem;font-weight:600}.status-panel p{font-size:.73rem;color:var(--muted);margin-top:4px;line-height:1.6}.result-panel{padding:18px;border:1px solid #d2dac0;background:#eff2e5;border-radius:8px;margin-top:18px}.result-panel h3,.result-panel strong{font-family:Georgia,serif;font-size:1.5rem;font-weight:400;color:#3c5d36}.result-panel p{font-size:.8rem;line-height:1.65;margin-top:7px}.result-panel .points{color:var(--cobalt);font-size:1.1rem}.result-panel .button{margin-top:10px}.section-label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px;min-height:25px}.section-label h3{font-size:.75rem;font-weight:650}.section-label>span{color:var(--muted);font-size:.6rem}.kit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.kit-grid>button,.kit-piece{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;background:#faf9f3;border:1px solid #d4d6c9;border-radius:8px;min-width:0;min-height:110px;padding:12px 5px;position:relative}.kit-grid>button:hover,.kit-piece:hover{border-color:#a0a8d8;background:#f4f5ff}.kit-grid>button[aria-pressed="true"],.kit-piece.selected{border-color:var(--cobalt);background:var(--cobalt-wash);box-shadow:0 0 0 1px var(--cobalt)}.kit-grid svg{width:38px;height:38px;color:var(--cobalt)}.kit-grid button strong,.kit-name{font-size:.72rem;font-weight:600}.kit-grid button small,.kit-count{font-size:.6rem;color:var(--muted)}.kit-grid button .kit-count{position:absolute;top:7px;right:8px;min-width:18px;height:18px;border-radius:50%;background:#e8e9de;display:flex;align-items:center;justify-content:center;color:#626750;font-size:.6rem}.kit-grid button.selected .kit-count{background:#d7defc;color:var(--cobalt)}.selection-hint{font-size:.7rem;line-height:1.6;color:var(--muted);margin-top:11px}.inspector-section{margin-top:20px}.inspector-section .section-label{margin-bottom:8px}.inspector{border:1px solid var(--line);border-radius:8px;padding:16px;min-height:114px;background:#fdfbf5}.inspector-empty{display:flex;align-items:center;gap:15px;min-height:80px}.inspector-empty>span{font-size:2rem;line-height:1;color:#9ba08e}.inspector-empty p{font-size:.75rem;line-height:1.7;color:var(--muted)}.inspector h3{font-size:.9rem}.inspector p{font-size:.75rem;line-height:1.65;margin-top:7px}.inspector .inspector-coordinate{font-size:.6rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:9px}.inspector .instruction,.inspector .gate-instruction{background:var(--cobalt-wash);border-left:2px solid var(--cobalt);padding:9px 11px;color:var(--cobalt);font-size:.8rem;font-weight:550;margin-top:10px}.inspector-actions{display:flex;gap:7px;flex-wrap:wrap;margin-top:12px}.inspector-actions .button{padding:9px 10px;font-size:.72rem;flex:1}.edit-actions{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}.edit-actions>.button{font-size:.7rem;padding:9px 10px}.edit-actions>.text-button{margin-left:auto;color:#757a6a}.access-details{border-top:1px solid var(--line);margin-top:18px;padding-top:5px}.access-details>summary{font-size:.67rem;color:var(--muted);display:flex;align-items:center;gap:7px}.access-details>summary::after{content:"+";margin-left:auto;font-size:1rem}.access-details[open]>summary::after{content:"−"}.access-details>p{font-size:.7rem;color:var(--muted);line-height:1.6;margin:4px 0 14px}.field{display:flex;flex-direction:column;gap:7px;min-width:0}.field label,.feedback-form>label{font-size:.7rem;font-weight:550}.field-action{display:flex;gap:7px}.field-action select{flex:1;min-width:0}.field-action .button{font-size:.7rem}.field select,.field input{background:#fffdf6;border:1px solid #cdd1bf;border-radius:6px;min-height:44px;padding:9px 10px;font-size:.75rem;max-width:100%;min-width:0}.coordinate-fields{display:grid;grid-template-columns:1fr 1fr auto;align-items:end;gap:8px;margin-top:13px}.coordinate-fields .button{font-size:.75rem}.run-details{border-top:1px solid var(--line);background:#f4f3eb}.run-details>summary{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:19px 28px;font-size:.75rem;list-style:none}.run-details>summary::-webkit-details-marker{display:none}.summary-detail{color:var(--muted);font-size:.65rem;display:flex;gap:18px;align-items:center}.summary-detail>span{font-size:1.2rem;line-height:1;color:#6c7360}.run-details[open] .summary-detail>span{transform:rotate(45deg)}.details-content{display:grid;grid-template-columns:1fr 1fr;gap:35px;padding:0 28px 26px}.playback-settings{max-width:300px}.playback-settings .check-field{margin-top:13px}.quiet-note{font-size:.68rem;color:var(--muted);line-height:1.7}.playback-settings>.quiet-note{margin-top:11px}.trace-section h3{font-size:.75rem;margin-bottom:7px}.event-list{font-size:.7rem;line-height:1.7;padding:0 0 0 19px;max-height:220px;overflow-y:auto;margin:12px 0 0;overscroll-behavior:contain}.event-list li{padding:4px 0 4px 4px;border-bottom:1px solid #e0e2d5}.event-list .tick{color:var(--cobalt);font-weight:600;font-variant-numeric:tabular-nums}.feedback-form>label{display:block;margin-bottom:9px}.feedback-form textarea{width:100%;display:block;border:1px solid #ccd0c2;border-radius:8px;background:#faf9f3;padding:13px 14px;line-height:1.6;font-size:.8rem;min-height:108px}.feedback-form textarea::placeholder{color:#969b8b}.check-field{display:flex!important;align-items:flex-start;gap:9px;cursor:pointer;font-size:.7rem;line-height:1.5;min-height:33px;font-weight:400!important}.feedback-form .check-field{margin:13px 0 0!important}.check-field input{appearance:none;position:relative;width:17px;height:17px;border:1px solid #abb19e;border-radius:4px;background:#fbfaf4;margin:1px 0 0;flex-shrink:0}.check-field input:checked{background:var(--cobalt);border-color:var(--cobalt)}.check-field input:checked::after{content:"✓";position:absolute;color:#fff;left:3px;top:0;font-size:12px;font-weight:700;line-height:15px}.feedback-bottom{display:flex;align-items:center;gap:15px;flex-wrap:wrap;margin-top:16px}.feedback-bottom .button{font-size:.75rem}.feedback-output{margin-top:15px;min-height:180px!important}.info-dialog{background:var(--paper-light);border:1px solid #d5d8ca;border-radius:14px;padding:28px 32px 30px;max-width:580px;width:calc(100% - 32px);max-height:calc(100dvh - 40px);overflow:auto;box-shadow:0 15px 60px #1e291b26;color:var(--ink)}.dialog-header{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:15px}.info-dialog h2{font-size:2.7rem;letter-spacing:-.045em;line-height:1.1;margin-bottom:18px}.dialog-lede{font-size:1rem;line-height:1.7}.rules-steps{list-style:none;padding:0;margin:28px 0;display:grid;gap:21px}.rules-steps li{display:flex;gap:16px;align-items:flex-start}.rule-number{font-family:Georgia,serif;font-size:1.3rem;color:var(--cobalt)}.rules-steps strong{font-size:.85rem;font-weight:600}.rules-steps p{font-size:.8rem;line-height:1.65;color:var(--muted);margin-top:5px}.rule-note{padding:16px 18px;border:1px solid #d4dafa;background:#eff1ff;border-radius:8px;margin-bottom:20px}.rule-note strong{font-size:.85rem;color:var(--cobalt)}.rule-note p{font-size:.8rem;line-height:1.65;margin-top:7px}.piece-rules{display:grid;gap:22px;margin:25px 0}.piece-rules article{display:flex;gap:22px;align-items:flex-start}.rule-piece{display:flex;align-items:center;justify-content:center;width:48px;min-width:48px;height:48px;border:1px solid #cbd3f8;color:var(--cobalt);background:var(--cobalt-wash);border-radius:8px;font-size:2rem;line-height:1}.flip-example{font-size:1.6rem}.piece-rules h3{font-size:.9rem;margin-bottom:6px}.piece-rules p{font-size:.8rem;line-height:1.65;color:var(--muted)}.piece-rules p+p{margin-top:8px}.piece-rules strong{color:var(--cobalt);font-weight:550}
  @media(max-width:760px) and (min-width:601px){.kit-grid{gap:5px}.kit-grid>button{min-height:100px;padding:10px 3px}.kit-grid button strong{font-size:.65rem}.kit-grid svg{width:30px;height:30px}.kit-grid button .kit-count{top:5px;right:5px}.edit-actions>.button{padding:8px 7px;font-size:.65rem}.edit-actions>.text-button{margin-left:0}.inspector{padding:12px}.board-tabs button{font-size:.68rem;padding:7px 9px}}
  @media(max-width:600px){.kit-grid{gap:8px}.kit-grid>button{min-height:102px}.board-tabs button{font-size:.65rem;gap:4px;min-width:0;padding:8px 6px;flex:1 1 calc(33.33% - 5px)}.board-tabs button:nth-child(n+4){flex-basis:calc(50% - 5px)}.inspector-section{margin-top:0}.kit-grid svg{width:34px;height:34px}.kit-grid button .kit-count{top:7px;right:7px}.section-label{margin-bottom:11px}.selection-hint{font-size:.7rem}.edit-actions .text-button{margin-left:auto}.inspector-empty{min-height:65px}.run-note{font-size:.63rem}.run-details .playback-settings .field select{width:100%}.entry-actions .primary{box-shadow:0 2px 0 #1b2f9a}}
}
@layer board {
  .board-mount{overflow:auto;overscroll-behavior-x:contain;scrollbar-width:thin;border-radius:6px}.board-grid{--columns:5;--cell-gap:4px;display:grid;gap:var(--cell-gap);max-width:360px;min-width:234px;margin:0 auto;isolation:isolate}.board-row{display:grid;grid-template-columns:repeat(var(--columns),minmax(44px,1fr));gap:var(--cell-gap)}.board-cell{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;min-width:44px;min-height:44px;width:100%;aspect-ratio:1;padding:3px 2px;border:1px solid #d9ddce;border-radius:5px;background:#f6f7ed;color:#5e6f53;overflow:hidden;transition:background .18s,border-color .15s,box-shadow .15s;line-height:1;touch-action:manipulation}.board-cell:not(.wall):hover{background:#fffef7;border-color:#afbba0}.board-cell:focus-visible{outline:3px solid var(--cobalt);outline-offset:-3px;z-index:2}.board-cell[aria-pressed="true"],.board-cell.selected{border:2px solid var(--cobalt);background:#e8edff;padding:2px 1px;box-shadow:inset 0 0 0 1px #ffffff80}.board-cell.moving{border:2px dashed var(--cobalt);opacity:.6}.board-cell.empty::before{content:"";position:absolute;width:3px;height:3px;background:#c8cfbb;border-radius:50%}.board-cell.wall{background:#d8deca;border-color:#d1d8c3;color:#a6b093;background-image:repeating-linear-gradient(135deg,transparent,transparent 5px,#c8d0ba66 5px,#c8d0ba66 6px)}.board-cell.wall::after{content:"";width:43%;height:43%;border:1px solid #b6c0a7;background:#c5ceb6;border-radius:2px}.board-cell.source{background:#dce5c8;border-color:#c3d0af}.board-cell.goal{background:#e4e9d8;border-color:#c9d3b7}.board-cell.goal.lit{background:var(--amber-light);border-color:#dcac41;color:#876018}.board-cell.piece{background:#edf0f6;border-color:#cbd2e7;color:var(--cobalt)}.board-cell.fixed{border-style:dashed}.board-cell .piece-svg{width:65%;max-width:42px;height:auto;aspect-ratio:1;z-index:1;flex-shrink:0}.board-cell.source .piece-svg,.board-cell.goal .piece-svg{width:47%;max-width:30px}.board-cell .cell-label{font-size:.56rem;font-weight:600;line-height:1.25;z-index:2;margin-top:2px;max-width:100%;overflow-wrap:anywhere}.board-cell .gate-direction{position:absolute;right:3px;bottom:3px;font-size:.42rem;line-height:1;letter-spacing:.01em;color:#7380b2;z-index:2}.board-cell.has-pulse{background:#ffe6a0;border-color:#dea637;box-shadow:inset 0 0 0 2px #f9c85866}.board-cell.has-pulse .signal{position:absolute;inset:0;z-index:3;pointer-events:none}.board-cell.has-pulse .signal svg{width:100%;height:100%;overflow:visible}.signal .signal-trail{stroke:#dba125;stroke-width:4;stroke-linecap:round;opacity:.78}.signal .signal-core{fill:#fff7ce;stroke:#ca8b17;stroke-width:2}.signal .signal-echo{fill:none;stroke:#dba125;stroke-width:1;opacity:.55}.board-cell.has-pulse.piece .piece-svg{opacity:.7}.board-cell.source.emitted{border-color:#cd9f44;background:#eae4bc}.board-cell.goal.lit .goal-center{fill:#e5ae35;stroke:none}.board-cell.goal .goal-check{display:none}.board-cell.goal.lit .goal-check{display:block}.board-cell.goal.lit .goal-letter{display:none}.board-cell.move-target{border-color:#a1aeea;background:#f1f3ff}.board-cell.move-target::after{content:"+";font-size:1.25rem;line-height:1;color:#a2aee3;font-weight:300}.goal-strip{display:flex;flex-wrap:wrap;justify-content:center;gap:5px 14px;padding:11px 0 0}.goal-chip{display:inline-flex;align-items:center;gap:5px;font-size:.6rem;line-height:1.5;color:#7d846d}.goal-chip .goal-state-dot{border:1.5px solid #98a484;display:inline-flex;align-items:center;justify-content:center;width:13px;height:13px;border-radius:50%;font-size:8px;line-height:1;flex-shrink:0}.goal-chip.lit{color:#866215}.goal-chip.lit .goal-state-dot{border-color:#c69a35;background:#f5c756}.source-callout{display:flex;justify-content:center;gap:5px;align-items:center;font-size:.58rem;line-height:1.4;color:#7b846a;margin-bottom:9px}.source-callout svg{width:12px;height:12px;fill:#6f8359}.source-callout strong{font-weight:600}.source-callout .source-direction{color:#50613e}.coordinate-mark{position:absolute;left:3px;top:3px;font-size:.35rem;line-height:1;color:#a7af99}.piece-svg{stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;fill:none}.piece-svg .tool-body{stroke-width:1.25;opacity:.5}.piece-svg .tool-line{stroke-width:3.4}.piece-svg .tool-center{fill:currentColor;stroke:none}.piece-svg .arrow-head{stroke-width:2.6}.piece-svg .source-body{fill:currentColor;stroke:none}.piece-svg .source-arrow{stroke:#f4f7e9;stroke-width:2.2}.piece-svg .goal-ring{stroke-width:2}.piece-svg text{stroke:none;fill:currentColor;font-family:ui-sans-serif,system-ui,sans-serif;font-size:13px;font-weight:650;text-anchor:middle;dominant-baseline:central}
  @media(max-width:760px) and (min-width:601px){.board-grid{--cell-gap:2px}.board-card{padding:10px}.board-cell .cell-label{font-size:.48rem}}
  @media(max-width:400px){.board-grid{--cell-gap:2px}.board-cell .cell-label{font-size:.5rem}.board-cell .gate-direction{font-size:.4rem;right:2px;bottom:2px}.board-key{gap:15px;font-size:.57rem}.goal-chip{font-size:.58rem}.board-cell .coordinate-mark{font-size:.32rem}}
}
@layer utilities {
  .sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:16px;top:-100px;background:var(--cobalt);color:#fff;padding:13px 18px;border-radius:7px;z-index:20;font-size:.85rem}.skip-link:focus{top:12px}.no-motion *,body.reduce-motion *{animation:none!important;transition:none!important;scroll-behavior:auto!important}.danger{color:#984c39}.saved{color:var(--green)}.muted{color:var(--muted)}
  @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
}
@layer board {
  .board-grid{position:relative}.route-overlay{position:absolute;inset:0;width:100%;height:100%;z-index:3;overflow:hidden;pointer-events:none}.route-overlay path{stroke:#d59a22;stroke-width:.055;stroke-linecap:round;fill:none;opacity:.82}.route-overlay circle{fill:#ffedac;stroke:#cb8e1c;stroke-width:.025}.fixed-marker{position:absolute;top:3px;left:3px;color:#8d96ac;font-size:.36rem;line-height:1}.goal-chip strong{font-weight:550}
}

@layer board { .source-callout{font-size:.65rem;flex-wrap:wrap;gap:4px 5px}.goal-strip{gap:6px 12px}.goal-chip{font-size:.65rem}.board-cell[aria-selected="true"]{border:2px solid var(--cobalt);background:#e8edff;padding:2px 1px} }
@media(max-width:600px){.intro h1{font-size:2.8rem}.intro-description{display:none}.intro-footnote{display:none}.intro-action{margin-top:18px}.intro-note p br{display:none}.intro-note{margin-bottom:15px}.intro{padding-top:25px;padding-bottom:25px}}

@layer components { .check-field{min-height:44px;align-items:center}.wordmark{min-height:44px}.privacy-details summary{min-height:44px} }
@media (min-width:601px) and (max-width:760px) {
  .workspace-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .board-column,.tools-column{max-width:430px;width:100%;margin:0 auto}
  .tools-column .kit-grid{gap:9px}
  .tools-column .kit-grid>button{min-height:105px}
  .tools-column .kit-grid button strong{font-size:.72rem}
  .tools-column .kit-grid svg{width:36px;height:36px}
}
/* The same toolkit moves above the board on small screens. */
@media (max-width:760px) {
  .board-column>.mobile-kit{padding:0 2px;margin:0 0 13px}
  .mobile-kit .section-label{min-height:18px;margin-bottom:8px}
  .mobile-kit .section-label h3{font-size:.7rem}
  .mobile-kit .section-label>span{font-size:.58rem}
  .mobile-kit .kit-grid{gap:7px}
  .mobile-kit .kit-grid>.kit-piece{min-height:68px;padding:6px 4px;gap:3px}
  .mobile-kit .kit-grid svg{width:24px;height:24px}
  .mobile-kit .kit-grid .kit-name{font-size:.68rem;line-height:1.2}
  .mobile-kit .kit-grid small{font-size:.55rem;line-height:1.25}
  .mobile-kit .kit-grid .kit-count{top:5px;right:5px;min-width:15px;height:15px;font-size:.53rem}
  .mobile-kit .selection-hint{margin-top:8px;font-size:.65rem;line-height:1.5}
  .mobile-kit #cancel-selection{min-height:44px;padding:5px 3px;margin-top:1px}
}
@media (max-width:350px) {
  .board-column>.mobile-kit{margin-left:14px;margin-right:14px;padding:0}
  .mobile-kit .kit-grid{gap:6px}
  .mobile-kit .kit-grid .kit-name{font-size:.65rem}
}
@layer components {
  .inspector .inspector-description{font-size:.75rem;line-height:1.65;margin-top:7px}
  .inspector .instruction{display:block;margin-bottom:8px}
}

@layer components {
  .save-recovery{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;padding:12px 20px;border-bottom:1px solid var(--line);background:var(--amber-light);min-width:0}
  .save-recovery .quiet-note{flex-basis:100%;overflow-wrap:anywhere}
}

@layer components {
  .piece-actions{margin-top:12px;padding:12px 0;border-top:1px solid var(--line);min-width:0}
  .piece-action-title{font-size:.8rem;font-weight:650;line-height:1.5;overflow-wrap:anywhere}
  .piece-actions .quiet-note{margin:5px 0 9px}
  .piece-action-controls,.piece-action-controls .inspector-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
  .piece-action-controls .inspector-actions{margin:0}
  .piece-action-controls .button{min-height:44px}
}

@layer components {
  .optional-experiment{margin-top:10px;max-width:42rem;line-height:1.65}
  .earlier-work{margin-top:24px;padding:16px 20px;border:1px solid var(--line);border-radius:12px;background:var(--paper-light)}
  .earlier-work summary{font-size:.85rem;font-weight:650;display:flex;align-items:center}
  #earlier-work-content{display:grid;gap:14px;font-size:.8rem;line-height:1.65}
  #earlier-work-content section{display:flex;flex-wrap:wrap;gap:8px 12px;padding-top:12px;border-top:1px solid var(--line)}
  #earlier-work-content section h3,#earlier-work-content section p{flex-basis:100%}
}