/* AIKIZI Lab shell. Every /lab page links this file and never pastes it:
   <link rel="stylesheet" href="/lab/_shell.css">
   Blocks in page order: tokens, header, tool frame, side panel (a bottom sheet under 900px),
   teach, footer, plain pages, guides, toast, switcher. /lab/_page.html shows every tool block in place.
   One accent: the active state, the focus ring and the words links. --accent2 marks New on the hub, nothing else. */

@font-face{font-family:"JetBrains Mono";src:url("/lab/fonts/jetbrains-mono-400.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}

:root{
  --bg:#08080A;--surf:#111113;--surf2:#1a1a1c;--line:rgba(255,255,255,.08);--line2:rgba(255,255,255,.16);
  --ink:#f2f2f0;--ink2:#c4c4c4;--ink3:#8a8a8a;--accent:#10B981;--accent2:#E8A33D;
  --ui:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",Menlo,monospace;
  --head:44px;--panel:320px;--bar:48px;
  color-scheme:dark
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.45 var(--ui);-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{font-weight:500}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
code,kbd,pre,output,.lab-mono{font-family:var(--mono)}

/* Header: 44px, solid. The same in a frame (19 Sep): a page shown inside another site keeps its own name and links. */
.lab-head{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:12px;height:var(--head);padding:0 16px;background:var(--bg);border-bottom:1px solid var(--line);white-space:nowrap}
.lab-head a{text-decoration:none}
.lab-mark{font-size:14px;font-weight:600;color:var(--ink)}
.lab-crumb,.lab-framed{font-size:14px;color:var(--ink2)}
.lab-crumb::after,.lab-framed::after{content:"/";margin-left:12px;color:var(--ink3)}
.lab-framed{display:none}
.lab-head h1{min-width:0;margin:0;overflow:hidden;text-overflow:ellipsis;font-size:15px;color:var(--ink)}
.lab-nav{display:flex;flex:none;gap:2px;margin-left:auto}
.lab-nav a{padding:6px 10px;border-radius:6px;font-size:14px;color:var(--ink2)}
.lab-nav a:hover{background:var(--surf2);color:var(--ink)}

/* Tool page: frame, teach and footer on the left; the panel on the right. */
.lab-app{display:grid;grid-template-columns:minmax(0,1fr) var(--panel);align-items:start}
.lab-app.lab-has-list{grid-template-columns:200px minmax(0,1fr) var(--panel)}
.lab-main{min-width:0}
.lab-frame{position:relative;display:flex;align-items:center;justify-content:center;height:calc(100vh - var(--head));height:calc(100dvh - var(--head));overflow:hidden;background:#050506;border-bottom:1px solid var(--line)}
.lab-frame canvas{display:block;max-width:100%;max-height:100%}
.lab-empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;margin:0;padding:24px;text-align:center;color:var(--ink2);pointer-events:none}
/* The hint sits on a solid plate so it reads over bright pictures; the offsets absorb the padding. */
.lab-hint{position:absolute;left:4px;bottom:6px;max-width:calc(100% - 8px);margin:0;padding:4px 8px;border-radius:4px;background:rgba(8,8,10,.86);font-size:13px;color:var(--ink2);pointer-events:none}
.lab-drop{position:absolute;inset:0;z-index:5;display:none;align-items:center;justify-content:center;background:rgba(8,8,10,.9);pointer-events:none}
.lab-drop.active{display:flex}

/* Left list on three-column pages (fx-engine, image-glitch, noise-texture, pixel-art). */
.lab-list{position:sticky;top:var(--head);height:calc(100vh - var(--head));height:calc(100dvh - var(--head));overflow:auto;padding:8px;background:var(--surf);border-right:1px solid var(--line)}
.lab-list button{display:block;width:100%;padding:8px 10px;border:0;border-radius:6px;background:none;text-align:left;font-size:14px;color:var(--ink2);cursor:pointer}
.lab-list button:hover{background:var(--surf2);color:var(--ink)}
.lab-list button.active,.lab-list button[aria-pressed="true"]{color:var(--accent)}

/* Side panel: <details> sections. Under 900px it is the bottom sheet. */
/* At the end of the panel a desktop wheel carries on and scrolls the page to the teach block. */
.lab-panel{position:sticky;top:var(--head);height:calc(100vh - var(--head));height:calc(100dvh - var(--head));overflow:auto;overscroll-behavior:auto;background:var(--surf);border-left:1px solid var(--line)}
.lab-sheet-bar{display:none}
.lab-panel-body{padding:4px 16px 24px}
.lab-panel details{border-bottom:1px solid var(--line)}
.lab-panel details[open]{padding-bottom:12px}
.lab-panel summary{padding:12px 0;font-size:14px;font-weight:500;color:var(--ink);cursor:pointer}
.lab-panel summary::marker{color:var(--ink3)}
.lab-row{display:grid;grid-template-columns:108px minmax(0,1fr) 44px;align-items:center;gap:10px;min-height:32px}
.lab-row.lab-check{grid-template-columns:1fr auto}
.lab-row>select{grid-column:2/-1}
.lab-row label{font-size:13px;color:var(--ink2)}
.lab-val{font-size:12px;color:var(--ink2);text-align:right}
.lab-readout{margin:8px 0 0;font:12px/1.5 var(--mono);color:var(--ink2)}
input[type=range]{width:100%;height:24px;margin:0;background:none;cursor:pointer;-webkit-appearance:none;appearance:none}
input[type=range]::-webkit-slider-runnable-track{height:2px;border-radius:1px;background:var(--line2)}
input[type=range]::-webkit-slider-thumb{width:14px;height:14px;margin-top:-6px;border:0;border-radius:50%;background:var(--ink);-webkit-appearance:none;appearance:none}
input[type=range]::-moz-range-track{height:2px;background:var(--line2)}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border:0;border-radius:50%;background:var(--ink)}
input[type=checkbox],input[type=radio]{width:16px;height:16px;margin:0;accent-color:var(--accent)}
input[type=color]{width:36px;height:24px;padding:0;border:1px solid var(--line2);border-radius:4px;background:none}
.lab-panel select,.lab-panel textarea,.lab-panel input[type=text],.lab-panel input[type=number]{width:100%;padding:6px 8px;border:1px solid var(--line2);border-radius:6px;background:var(--bg)}
.lab-pills,.lab-actions{display:flex;flex-wrap:wrap;gap:6px}
.lab-pill,.lab-btn{min-height:32px;padding:5px 12px;border:1px solid var(--line2);border-radius:6px;background:none;font-size:13px;color:var(--ink2);cursor:pointer}
.lab-pill:hover,.lab-btn:hover{border-color:rgba(255,255,255,.3);color:var(--ink)}
.lab-pill.active,.lab-pill[aria-pressed="true"]{border-color:var(--accent);color:var(--accent)}
.lab-btn-main{border-color:var(--ink);background:var(--ink);color:var(--bg)}
.lab-btn-main:hover{background:#fff;color:var(--bg)}
.lab-file{width:100%;padding:14px;border:1px dashed var(--line2);border-radius:8px;background:none;font-size:13px;color:var(--ink2);cursor:pointer}
.lab-file:hover{border-color:rgba(255,255,255,.3);color:var(--ink)}
.lab-reset{width:100%;margin-top:16px}

/* Teach block: under the frame on every tool page. */
.teach{max-width:680px;margin:0 auto;padding:40px 24px 8px}
.teach h2{margin:0 0 8px;font-size:20px;line-height:1.3}
.teach p,.teach li{font-size:17px;line-height:1.55;color:var(--ink2)}
.teach p,.teach ol{margin:0 0 28px}
.teach ol{padding-left:1.25em}
.teach li+li{margin-top:4px}
.teach .lab-words{font-size:15px;color:var(--ink3)}
.lab-words a{color:var(--accent);text-decoration:none}
.lab-words a:hover{text-decoration:underline}

/* Footer. */
.lab-foot{max-width:680px;margin:0 auto;padding:20px 24px 48px;border-top:1px solid var(--line);font-size:14px;color:var(--ink3)}
.lab-foot p{margin:0 0 8px}
.lab-foot nav{display:flex;flex-wrap:wrap;gap:6px 16px}
.lab-related{display:contents}
.lab-foot a{color:var(--ink2);text-decoration:none}
.lab-foot a:hover{color:var(--ink);text-decoration:underline}

/* Plain pages on the shell (/lab/words). */
.lab-doc{max-width:680px;margin:0 auto;padding:32px 24px 48px}
/* A reading page (words, a word, a guide) wears its name as its own h1: the site's bar is the only bar above it. */
.lab-doc h1,.lab-guide h1{margin:0 0 10px;font:500 32px/1.15 "Outfit",var(--ui);letter-spacing:-.01em;color:var(--ink)}
.lab-doc h1 .w-ta,.lab-guide h1 small{font:400 18px/1.2 var(--ui);color:var(--ink3)}
.lab-doc h2{margin:40px 0 12px;font-size:20px}
.lab-doc p{font-size:17px;line-height:1.55;color:var(--ink2)}
.lab-terms{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.lab-terms li{display:flex;justify-content:space-between;gap:16px;margin:0 -8px;padding:10px 8px;border-bottom:1px solid var(--line);scroll-margin-top:calc(var(--head) + 16px)}
.lab-terms li:target{background:var(--surf2)}
.lab-terms a{color:var(--ink3);text-decoration:none}
.lab-terms a:hover{color:var(--ink);text-decoration:underline}

/* Guides (/lab/<slug>/guide/, generated by scripts/lab-guides.mjs): a reading column with a page row,
   pictures made by the tool, control lists, settings tables, keys and numbered steps. */
.teach .lab-guide-link{margin:-12px 0 28px;font-size:15px}
.teach h3{margin:0 0 4px;font-size:17px;line-height:1.4}
.teach .lab-reading{font-size:15px;color:var(--ink3)}
.lab-reading a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--line2);text-underline-offset:3px}
.teach .lab-guide-link a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--line2);text-underline-offset:3px}
.lab-guide{max-width:680px;margin:0 auto;padding:0 24px 16px}
.lab-guide-nav{display:flex;flex-wrap:wrap;gap:2px;margin:0 -8px;padding:12px 0;border-bottom:1px solid var(--line)}
.lab-guide .lab-guide-nav a{padding:6px 8px;border-radius:6px;font-size:14px;color:var(--ink2);text-decoration:none}
.lab-guide .lab-guide-nav a:hover{background:var(--surf2);color:var(--ink)}
.lab-guide .lab-guide-nav a[aria-current="page"]{color:var(--accent)}
.lab-guide h2{margin:32px 0 16px;font-size:26px;line-height:1.25}
.lab-guide h3{margin:36px 0 10px;font-size:19px;line-height:1.3}
.lab-guide h4{margin:24px 0 6px;font-size:16px}
.lab-guide p,.lab-guide li{font-size:17px;line-height:1.55;color:var(--ink2)}
.lab-guide p{margin:0 0 16px}
.lab-guide ul,.lab-guide ol{margin:0 0 20px;padding-left:1.25em}
.lab-guide li+li{margin-top:6px}
.lab-guide b{font-weight:500;color:var(--ink)}
.lab-guide a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--line2);text-underline-offset:3px}
.lab-guide a:hover{text-decoration-color:var(--ink)}
.lab-guide a.lab-word{color:var(--accent);text-decoration:none}
.lab-guide a.lab-word:hover{text-decoration:underline}
.lab-guide p.lab-guide-lead{font-size:21px;line-height:1.4;color:var(--ink)}
.lab-guide p.lab-guide-note{font-size:15px;color:var(--ink3)}
.lab-guide figure{margin:24px 0}
.lab-guide figure img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:8px;background:#050506}
.lab-guide figcaption{margin-top:8px;font-size:14px;color:var(--ink3)}
.lab-guide-actions{display:flex;flex-wrap:wrap;gap:8px}
.lab-guide a.lab-btn{display:inline-flex;align-items:center;font-size:14px;color:var(--ink);text-decoration:none}
.lab-guide a.lab-btn-main{color:var(--bg)}
.lab-guide ol.lab-guide-toc{padding:0;list-style:none;border-top:1px solid var(--line)}
.lab-guide-toc li{border-bottom:1px solid var(--line)}
.lab-guide .lab-guide-toc li+li{margin-top:0}
.lab-guide .lab-guide-toc a{display:flex;flex-wrap:wrap;gap:2px 16px;padding:12px 0;text-decoration:none}
.lab-guide-toc b{min-width:140px}
.lab-guide-toc span{color:var(--ink3)}
.lab-guide ol.lab-guide-steps{padding:0;list-style:none;counter-reset:step}
.lab-guide-steps li{position:relative;min-height:28px;padding-left:40px;counter-increment:step}
.lab-guide-steps li::before{content:counter(step);position:absolute;left:0;top:0;width:28px;height:28px;border:1px solid var(--line2);border-radius:50%;font:13px/26px var(--mono);text-align:center;color:var(--ink)}
.lab-guide .lab-guide-steps li+li{margin-top:12px}
.lab-guide-controls{margin:0 0 8px;border-top:1px solid var(--line)}
.lab-guide-controls>div{display:grid;grid-template-columns:180px minmax(0,1fr);gap:4px 20px;padding:10px 0;border-bottom:1px solid var(--line)}
.lab-guide-controls dt{font-size:15px;color:var(--ink)}
.lab-guide-controls dt small{display:block;margin-top:2px;font:12px/1.4 var(--mono);color:var(--ink3)}
.lab-guide-controls dd{margin:0;font-size:16px;line-height:1.5;color:var(--ink2)}
.lab-guide-controls dd ul{margin:8px 0 0}
.lab-guide-controls dd li{font-size:16px}
.lab-guide-only{display:inline-block;margin-left:6px;padding:0 6px;border:1px solid var(--line2);border-radius:4px;font-size:12px;font-weight:400;line-height:18px;color:var(--ink3);vertical-align:2px}
.lab-guide-scroll{margin:0 0 20px;overflow-x:auto}
.lab-guide table{width:100%;border-collapse:collapse;font-size:15px}
.lab-guide th,.lab-guide td{padding:8px 16px 8px 0;border-bottom:1px solid var(--line);text-align:left;vertical-align:baseline;color:var(--ink2)}
.lab-guide th{font-weight:500;color:var(--ink)}
.lab-guide td.lab-mono{white-space:nowrap;font-size:13px;color:var(--ink)}
.lab-guide kbd{display:inline-block;min-width:24px;padding:0 6px;border:1px solid var(--line2);border-radius:4px;font-size:13px;line-height:22px;text-align:center;color:var(--ink)}
.lab-guide code{font-size:.9em;color:var(--ink)}
.lab-guide-pager{display:flex;justify-content:space-between;gap:16px;margin-top:40px;padding-top:16px;border-top:1px solid var(--line)}
.lab-guide .lab-guide-pager a{font-size:16px;text-decoration:none}
.lab-guide-pager a[rel="next"]{margin-left:auto;text-align:right}
.lab-guide-pager span{display:block;font-size:13px;color:var(--ink3)}

/* Toast: one calm line. */
.lab-toast{position:fixed;left:50%;bottom:24px;z-index:70;max-width:calc(100vw - 32px);padding:10px 16px;border:1px solid var(--line2);border-radius:8px;background:var(--surf2);font-size:14px;color:var(--ink);transform:translateX(-50%);visibility:hidden}
.lab-toast.show{visibility:visible}

/* All tools switcher (Cmd+K / Ctrl+K). */
.lab-switcher{position:fixed;inset:0;z-index:80;display:flex;align-items:flex-start;justify-content:center;padding:min(15vh,120px) 16px 16px;background:rgba(0,0,0,.64)}
.lab-switcher-box{width:100%;max-width:520px;overflow:hidden;border:1px solid var(--line2);border-radius:10px;background:var(--surf)}
.lab-switcher input{display:block;width:100%;padding:14px 16px;border:0;border-bottom:1px solid var(--line);background:none;font-size:16px;outline-offset:-2px}
.lab-switcher ul{max-height:min(60vh,440px);margin:0;padding:6px;overflow:auto;list-style:none}
.lab-switcher a{display:flex;justify-content:space-between;gap:12px;padding:9px 10px;border-radius:6px;font-size:14px;color:var(--ink2);text-decoration:none;outline-offset:-2px}
.lab-switcher a:hover,.lab-switcher a:focus{background:var(--surf2);color:var(--ink)}
.lab-switcher a[aria-current="page"]{color:var(--accent)}
.lab-switcher small{font-size:13px;color:var(--ink3)}
.lab-switcher .lab-none{padding:9px 10px;color:var(--ink3)}

/* Phones and small tablets: a column. The frame is the top 56vh; the panel is a 48px bar that opens to 70vh. */
@media (max-width:899px){
  .lab-app,.lab-app.lab-has-list{display:block}
  .lab-frame{height:56vh;height:56svh}
  .lab-list{position:static;display:flex;gap:6px;height:auto;padding:8px 12px;overflow-x:auto;border-right:0;border-bottom:1px solid var(--line)}
  .lab-list button{flex:none;width:auto;border:1px solid var(--line2);white-space:nowrap}
  .lab-panel{position:fixed;inset:auto 0 0;z-index:50;height:var(--bar);overflow:hidden;border-left:0;border-top:1px solid var(--line2)}
  .lab-panel.is-open{height:70vh;height:70svh}
  .lab-sheet-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;height:var(--bar);padding:0 16px;border:0;border-bottom:1px solid var(--line);background:var(--surf);font-size:15px;color:var(--ink);cursor:pointer}
  .lab-sheet-state{font-size:14px;color:var(--ink3)}
  .lab-panel-body{height:calc(100% - var(--bar));overflow:auto;overscroll-behavior:contain}
  .lab-main{padding-bottom:var(--bar)}
  .lab-toast{bottom:calc(var(--bar) + 12px)}
  .lab-app:has(.lab-panel.is-open) ~ .lab-toast{bottom:calc(70vh + 12px);bottom:calc(70svh + 12px)}
  .lab-head{gap:8px;padding:0 12px}
  .lab-crumb::after,.lab-framed::after{margin-left:8px}
  .lab-nav a{padding:6px 8px}
  .lab-guide{padding:0 16px 16px}
  .lab-guide-controls>div{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:599px){
  .lab-guide h2{font-size:22px}
}

/* The Words page says what it is before anything else (the bar's Words link carries the same line on hover). */
.lab-doc .lab-words-line{margin:0 0 16px;font-size:13px;letter-spacing:.02em;color:var(--ink3)}

/* The shell (docs/LAB-SHELL.md): body.lab-shell. The panel on the left with Load and Export pinned in its
   dock, grouped controls below; the canvas on the right; the tool name in the lab's display type. Under
   900px the panel is still the sheet under the canvas. Outfit comes from the public bar the Worker adds. */
@media (min-width:900px){
  .lab-shell .lab-app{grid-template-columns:var(--panel) minmax(0,1fr)}
  .lab-shell .lab-app.lab-has-list{grid-template-columns:var(--panel) 200px minmax(0,1fr)}
  .lab-shell .lab-panel{order:-1;border-left:0;border-right:1px solid var(--line)}
}
.lab-shell .lab-head h1{font-family:"Outfit",var(--ui);font-weight:500;font-size:18px;letter-spacing:.01em}
.lab-dock{position:sticky;top:0;z-index:3;display:grid;gap:8px;margin:0 -16px 4px;padding:12px 16px;background:var(--surf);border-bottom:1px solid var(--line)}
.lab-dock-row{display:flex;flex-wrap:wrap;gap:6px}
.lab-dock-label{align-self:center;margin-right:4px;font-size:13px;color:var(--ink2)}
.lab-dock-load .lab-file{flex:1 1 100%;margin:0}
.lab-dock .lab-reset{width:auto;margin:0 0 0 auto}
.lab-shell .lab-row input[type=checkbox]{appearance:none;-webkit-appearance:none;flex:none;width:30px;height:18px;margin:0;border:1px solid var(--line2);border-radius:9px;background:var(--surf2);position:relative;cursor:pointer}
.lab-shell .lab-row input[type=checkbox]::after{content:"";position:absolute;top:2px;left:2px;width:12px;height:12px;border-radius:50%;background:var(--ink3)}
.lab-shell .lab-row input[type=checkbox]:checked{background:var(--accent);border-color:var(--accent)}
.lab-shell .lab-row input[type=checkbox]:checked::after{transform:translateX(12px);background:#fff}

/* The bench (body.lab-bench, docs/LAB-SHELL.md; scripts/lab-bench.mjs moves the markup). The canvas fills the
   left, the panel is a fixed column on the right, and the document never scrolls: the wheel belongs to the
   canvas, the panel scrolls inside itself. The panel speaks the brand: the tool name in Outfit (the bar's
   face), one line of Lab Serif under it (Source Serif, Learn's reading face), section labels in tracked small capitals
   over a hairline, numbers in mono, --accent the only colour. No gradients, no glass, no glow. One easing,
   the bar's own, settles the panel and the canvas on load; nothing bounces. */
@font-face{font-family:"Outfit";src:url("/lab/fonts/outfit-500.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"Lab Serif";src:url("/lab/fonts/lab-serif-400.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
.lab-bench{--bench:clamp(360px,28vw,400px);--pbh:56px;--ease:cubic-bezier(.22,1,.36,1);--display:"Outfit",var(--ui);--serif:"Lab Serif",Georgia,serif}
html:has(body.lab-bench){height:100%;overflow:hidden}
body.lab-bench{display:flex;flex-direction:column;height:100vh;height:100dvh;overflow:hidden}
.lab-bench>.pb{flex:none}
.lab-bench .lab-app{flex:1 1 auto;min-height:0;display:grid;grid-template-columns:minmax(0,1fr) var(--bench);align-items:stretch}
.lab-bench .lab-main{min-height:0;height:100%}
/* A frame that holds more than one screen of its own (a table, two pictures and a chart) scrolls inside itself. */
.lab-bench .lab-frame{height:100%;border-bottom:0;overflow:auto;overscroll-behavior:contain;align-items:safe center;justify-content:safe center}
.lab-bench .lab-panel{position:relative;top:auto;order:0;display:flex;flex-direction:column;height:100%;overflow:hidden;border-left:1px solid var(--line);border-right:0}
.lab-bench .lab-panel-body,.lab-panel-guide{flex:1 1 auto;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--line2) transparent}
@media (prefers-reduced-motion:no-preference){
  .lab-bench .lab-frame{animation:lab-settle .6s var(--ease) both}
  .lab-bench .lab-panel{animation:lab-settle .6s .06s var(--ease) both}
}
@keyframes lab-settle{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* Head: Lab / All tools, the name, one serif line, the two tabs. */
.lab-panel-head{flex:none;padding:18px 24px 0;border-bottom:1px solid var(--line)}
.lab-panel-crumb{display:flex;align-items:center;gap:8px;margin:0 0 10px;font:500 13px/16px var(--display);letter-spacing:.1em;font-variant-caps:all-small-caps;color:var(--ink3)}
.lab-panel-crumb a{color:var(--ink3);text-decoration:none}
.lab-panel-crumb a:hover,.lab-panel-all:hover{color:var(--ink)}
.lab-panel-all{margin-left:auto;padding:0;border:0;background:none;font:inherit;letter-spacing:inherit;text-transform:inherit;color:var(--ink3);cursor:pointer}
.lab-panel-head h1{margin:0;font:500 26px/1.15 var(--display);letter-spacing:-.005em;color:var(--ink)}
.lab-panel-says{margin:8px 0 0;font:400 16px/1.45 var(--serif);color:var(--ink2);text-wrap:pretty}
.lab-tabs{display:flex;gap:24px;margin-top:18px}
.lab-tab{position:relative;padding:0 0 11px;border:0;background:none;font:500 14px/16px var(--display);letter-spacing:.1em;font-variant-caps:all-small-caps;color:var(--ink3);cursor:pointer}
.lab-tab::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:left}
.lab-tab:hover,.lab-tab[aria-selected="true"]{color:var(--ink)}
.lab-tab[aria-selected="true"]::after{transform:scaleX(1)}

/* Controls: the dock pinned, groups with air between them, Reset at the foot. */
.lab-bench .lab-panel-body{padding:0 24px}
.lab-bench .lab-dock{margin:0 -24px;padding:16px 24px;gap:10px}
.lab-bench .lab-dock-row{gap:8px}
.lab-bench .lab-panel details{margin-top:22px;border:0}
.lab-bench .lab-panel details[open]{padding-bottom:0}
.lab-bench .lab-panel summary{display:flex;align-items:center;gap:12px;padding:0 0 12px;list-style:none;font:500 13px/16px var(--display);letter-spacing:.1em;font-variant-caps:all-small-caps;color:var(--ink3)}
.lab-bench .lab-panel summary::-webkit-details-marker{display:none}
.lab-bench .lab-panel summary::after{content:"";flex:1;height:1px;background:var(--line)}
.lab-bench .lab-panel summary::before{content:"+";order:2;font:400 13px/1 var(--mono);color:var(--ink3)}
.lab-bench .lab-panel details[open]>summary::before{content:"\2013"}
.lab-bench .lab-panel summary:hover{color:var(--ink)}
.lab-bench .lab-row{grid-template-columns:104px minmax(0,1fr) 48px;gap:12px;min-height:34px}
.lab-bench .lab-row.lab-check{grid-template-columns:1fr auto}
.lab-bench .lab-row label{font-size:13px;color:var(--ink2)}
.lab-bench .lab-val,.lab-bench .lab-readout{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink)}
.lab-bench .lab-val{font-size:12px}
.lab-bench .lab-readout{color:var(--ink3)}
.lab-bench input[type=range]{height:28px}
.lab-bench input[type=range]::-webkit-slider-runnable-track{height:1px;background:var(--line2)}
.lab-bench input[type=range]::-webkit-slider-thumb{width:16px;height:16px;margin-top:-7.5px;border:4px solid var(--surf);border-radius:50%;background:var(--ink);outline:1px solid var(--line2)}
.lab-bench input[type=range]:hover::-webkit-slider-thumb,.lab-bench input[type=range]:focus-visible::-webkit-slider-thumb{background:var(--accent)}
.lab-bench input[type=range]::-moz-range-track{height:1px;background:var(--line2)}
.lab-bench input[type=range]::-moz-range-thumb{width:8px;height:8px;border:4px solid var(--surf);border-radius:50%;background:var(--ink);outline:1px solid var(--line2)}
.lab-bench .lab-pills{gap:6px}
.lab-bench .lab-pill,.lab-bench .lab-btn{min-height:32px;padding:5px 14px;border-radius:999px;font-size:13px}
.lab-bench .lab-pill.active,.lab-bench .lab-pill[aria-pressed="true"]{border-color:var(--accent);background:rgba(16,185,129,.08);color:var(--ink)}
.lab-bench .lab-btn-main{border-color:var(--ink);background:var(--ink);color:var(--bg)}
.lab-bench .lab-file{padding:16px;border-radius:12px;font-size:13px}
.lab-bench .lab-panel select,.lab-bench .lab-panel input[type=text],.lab-bench .lab-panel input[type=number],.lab-bench .lab-panel textarea{border-radius:8px;background:var(--bg)}
.lab-panel-foot{position:sticky;bottom:0;margin:28px -24px 0;padding:12px 24px 16px;background:var(--surf);border-top:1px solid var(--line)}
.lab-bench .lab-panel-foot .lab-reset{width:100%;margin:0}

/* Modes that once had their own column: a chip group, its sub-headings as quiet lines. */
.lab-bench .lab-modes .lab-list{position:static;display:flex;flex-wrap:wrap;gap:6px;height:auto;padding:0;overflow:visible;background:none;border:0}
.lab-bench .lab-modes .lab-list>:not(button){flex:1 0 100%;margin:8px 0 2px;padding:0;font-size:12px;color:var(--ink3)}
.lab-bench .lab-modes .lab-list>:first-child{margin-top:0}
.lab-bench .lab-modes .lab-list button{display:inline-flex;width:auto;min-height:32px;padding:5px 14px;border:1px solid var(--line2);border-radius:999px;font-size:13px;color:var(--ink2)}
.lab-bench .lab-modes .lab-list button:hover{border-color:rgba(255,255,255,.3);background:none;color:var(--ink)}
.lab-bench .lab-modes .lab-list button.active,.lab-bench .lab-modes .lab-list button[aria-pressed="true"]{border-color:var(--accent);background:rgba(16,185,129,.08);color:var(--ink)}

/* Guide: the page's own teaching words, read in the serif. */
.lab-panel-guide{padding:8px 24px 32px}
.lab-panel-guide .teach,.lab-panel-guide .lab-foot{max-width:none;margin:0;padding:0}
.lab-panel-guide .teach h2{margin:24px 0 10px;font:500 13px/16px var(--display);letter-spacing:.1em;font-variant-caps:all-small-caps;color:var(--ink3)}
.lab-panel-guide .teach h3{margin:18px 0 4px;font:500 15px/1.4 var(--ui);color:var(--ink)}
.lab-panel-guide .teach p,.lab-panel-guide .teach li{font:400 16px/1.55 var(--serif);color:var(--ink2)}
.lab-panel-guide .teach p,.lab-panel-guide .teach ol{margin:0 0 12px}
.lab-panel-guide .teach .lab-guide-link{margin:4px 0 12px;font-family:var(--ui);font-size:14px}
.lab-panel-guide .teach .lab-words{font:14px/1.6 var(--ui);color:var(--ink3)}
.lab-panel-guide .lab-foot{margin-top:24px;padding-top:16px;border-top:1px solid var(--line);font-size:13px}
.lab-panel-guide .lab-foot nav{gap:6px 14px}

/* Phones: the page still never scrolls. The canvas fills what the bar and the sheet leave; the sheet opens
   over it with the same head and tabs. */
@media (max-width:899px){
  .lab-bench .lab-app{display:block;position:relative}
  .lab-bench .lab-main{height:calc(100% - var(--bar));padding-bottom:0}
  .lab-bench .lab-panel{position:fixed;inset:auto 0 0;height:var(--bar);border-left:0;animation:none}
  .lab-bench .lab-panel.is-open{height:78vh;height:78svh}
  .lab-bench .lab-panel .lab-panel-head{padding:14px 16px 0}
  .lab-bench .lab-panel-says{display:none}
  .lab-bench .lab-panel-crumb{display:none}
  .lab-bench .lab-panel-head h1{display:none}
  .lab-bench .lab-tabs{margin-top:0}
  .lab-bench .lab-panel-body{height:auto;padding:0 16px}
  .lab-bench .lab-dock{margin:0 -16px;padding:12px 16px}
  .lab-panel-guide{padding:4px 16px 24px}
  .lab-panel-foot{margin:24px -16px 0;padding:10px 16px 12px}
  .lab-bench .lab-app:has(.lab-panel.is-open) ~ .lab-toast{bottom:calc(78vh + 12px);bottom:calc(78svh + 12px)}
}

/* The picture shelf (public/lab/_pictures.js): Image A and Image B, kept on this device, on every tool that takes a
   picture. 96 px squares in the dock's Load row: a plus when empty; the picture, its name on a solid plate and an ×
   when full; Swap between them. On a one-picture tool the tile in use wears the accent and the other is dimmed and
   says so. A file dragged over the page outlines the frame; a tile under it is marked. */
.lab-dock-load .lab-pictures{flex:1 1 100%}
.lab-pictures{display:flex;align-items:center;gap:12px}
.lab-picture{position:relative;flex:none;width:96px;height:96px}
.lab-picture-pick{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;width:100%;height:100%;padding:0;overflow:hidden;border:1px dashed var(--line2);border-radius:12px;background:none;font-size:12px;line-height:1.3;color:var(--ink2);cursor:pointer}
.lab-picture-pick::before{content:"+";font:300 28px/1 var(--ui)}
.lab-picture-pick:hover{border-color:rgba(255,255,255,.3);color:var(--ink)}
.lab-picture-pick img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.lab-picture-name{position:relative}
.lab-picture.has .lab-picture-pick{border-style:solid;border-color:var(--line2)}
.lab-picture.has .lab-picture-pick::before{content:none}
.lab-picture.has .lab-picture-name{position:absolute;left:0;right:0;bottom:0;padding:4px 6px;background:rgba(8,8,10,.82);color:var(--ink);text-align:center}
.lab-picture.on .lab-picture-pick,.lab-picture.over .lab-picture-pick{border-color:var(--accent)}
.lab-picture.off .lab-picture-pick{color:var(--ink3);cursor:default}
.lab-picture.off .lab-picture-pick::before{content:none}
.lab-picture.off .lab-picture-pick::after{content:"Not used here";position:relative;padding:2px 6px;border-radius:4px;background:rgba(8,8,10,.82);font-size:11px;color:var(--ink2)}
.lab-picture.off .lab-picture-pick img{opacity:.3}
.lab-picture.off .lab-picture-pick:hover{border-color:var(--line2);color:var(--ink3)}
.lab-picture-x{position:absolute;top:-7px;right:-7px;z-index:1;width:22px;height:22px;padding:0;border:1px solid var(--line2);border-radius:50%;background:var(--surf);font-size:14px;line-height:20px;color:var(--ink);cursor:pointer}
.lab-picture-x:hover{border-color:var(--accent);color:var(--accent)}
.lab-picture-swap{flex:none;width:36px;height:36px;padding:0;border:1px solid var(--line2);border-radius:50%;background:none;font-size:0;color:var(--ink2);cursor:pointer}
.lab-picture-swap::before{content:"\21C4";font:400 17px/34px var(--ui)}
.lab-picture-swap:hover{border-color:rgba(255,255,255,.3);color:var(--ink)}
.lab-dock .lab-pictures-line{margin:0}
.lab-frame.lab-dropping{outline:2px dashed var(--accent);outline-offset:-8px}