/* ==========================================================================
   aidbs.css · AI-Directed Brand Systems (work/case-ai-directed-brand-systems.html)
   and its five brand libraries (work/ai-directed-brand-systems/<brand>.html)
   JasonWalker.design · 29 September 2026 · v2.0 (R4: the brand idea, the app experience in
   either mode, the six-tab library, the brand system, the shapes, the working control lab)

   The page wears the portfolio shell: Carbon, Bone, Matte Silver, Radikal. It
   reuses the campaign studies' mechanics (spec-campaign.css: .cs-wrap, .cs-sec,
   .cs-kick, .cs-h2, the film component, the viewer, the tabs, the embeds) under
   one skin, body.cs[data-brand="walker"], defined here. Each brand chapter then
   sets its own ground and ink from the reconciled library tokens, so the five
   worlds read as five worlds on one page.

   Acid (#DFFF00) is an animation material only; it does not appear in type here.
   ========================================================================== */

@font-face{font-family:'AI Quantico';src:url('../fonts/frontline21/quantico-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'AI Poppins';src:url('../fonts/frontline21/poppins-400.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'AI Poppins';src:url('../fonts/frontline21/poppins-500.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap}

/* ------------------------------------------------------------ the skin -- */
body.cs[data-brand="walker"]{
  --bg:#171717; --fg:#F2EFE9; --muted:rgba(242,239,233,.72); --rule:rgba(242,239,233,.18);
  --alt-bg:#F2EFE9; --alt-fg:#171717; --alt-muted:rgba(23,23,23,.72); --alt-rule:rgba(23,23,23,.18);
  --alt2-bg:#1F2122; --alt2-fg:#F2EFE9; --alt2-muted:rgba(242,239,233,.74); --alt2-rule:rgba(242,239,233,.18); --alt2-mark:#9FA4A5;
  --accent:#9FA4A5; --mark:#9FA4A5; --alt-mark:#171717; --link:var(--fg);
  --display:var(--font-brand); --d-weight:300; --d-case:none; --d-track:-.018em; --d-lead:1.02;
  --body:var(--font-brand);
  --label:var(--font-brand); --l-weight:500; --l-track:.14em;
  --btn-bg:var(--fg); --btn-fg:var(--bg);
  --frame:#000;
  --cs-max:1560px;
  background:#171717;
}
body.cs[data-brand="walker"] .cs-h2{font-weight:300;letter-spacing:-.018em}
body.cs[data-brand="walker"] .cs-title{font-weight:300;letter-spacing:-.022em}
body.cs[data-brand="walker"] .cs-kick{font-weight:500}
body.cs[data-brand="walker"] .cs-btn,body.cs[data-brand="walker"] .cs-link{font-weight:500}
.ai .cs-sec{padding:clamp(56px,7vw,112px) 0}

/* ------------------------------------------------------------- the hero -- */
.ai-hero{background:var(--bg);color:var(--fg);padding:0 0 clamp(40px,5vw,72px)}
.ai-hero .cs-film{max-width:none}
.ai-hero .cs-frame{aspect-ratio:16/9;width:100%;max-height:calc(100svh - var(--cs-head));background:#000}
.ai-hero .cs-film[data-fmt="phone"] .cs-frame{aspect-ratio:9/16;width:100%;max-height:none}
.ai-hero .cs-film.is-sound .cs-frame{aspect-ratio:16/9;width:100%}
.ai-hero .cs-frame video{object-fit:cover}
.ai-hero .cs-film.is-sound .cs-frame video{object-fit:contain}
.ai-hero .cs-play{left:auto;right:clamp(12px,1.6vw,24px);bottom:clamp(12px,1.6vw,24px);top:auto}
.ai-hero .cs-hold{left:clamp(12px,1.6vw,24px);right:auto;bottom:clamp(12px,1.6vw,24px);top:auto}
.ai-hero .cs-film[data-preview] .cs-play{right:clamp(12px,1.6vw,24px)}
.ai-hero .cs-cc{color:var(--fg)}
.ai-open{display:grid;gap:clamp(18px,2.2vw,32px);padding-top:clamp(36px,4.4vw,64px)}
.ai-open__head{display:grid;gap:clamp(14px,1.6vw,22px);align-content:start}
.ai-open__title{font-size:clamp(44px,6.4vw,104px);max-width:12ch}
.ai-deck{font-size:clamp(20px,1.9vw,30px);line-height:1.34;font-weight:300;max-width:30ch;text-wrap:pretty;color:var(--fg)}
.ai-proof{font-size:clamp(16px,1.2vw,19px);line-height:1.5;color:var(--muted);max-width:44ch}
.ai-role{display:flex;flex-wrap:wrap;gap:6px 0;font:500 12px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ai-role span+span::before{content:'·';padding:0 .7em;opacity:.55}
.ai-open__bar{display:flex;flex-wrap:wrap;gap:8px 22px;align-items:baseline;font-size:14px;color:var(--muted)}
.ai-open__bar b{color:var(--fg);font-weight:500}
.ai-open__bar a{color:inherit;text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-open__bar a:hover{border-bottom-color:currentColor;color:var(--fg)}
@media (min-width:980px){
  .ai-open{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);align-items:end}
  .ai-open__aside{display:grid;gap:clamp(18px,2vw,28px);padding-bottom:6px}
}

/* --------------------------------------------------- the pull and method -- */
.ai-pull{font-size:clamp(28px,3.6vw,56px);line-height:1.08;font-weight:300;letter-spacing:-.018em;max-width:20ch;text-wrap:balance}
.ai-pull b{font-weight:300;color:var(--muted)}
.ai-method{display:grid;gap:clamp(28px,3vw,44px) var(--cs-gap);margin-top:clamp(28px,3.4vw,52px)}
.ai-step{display:grid;gap:12px;align-content:start;border-top:1px solid var(--rule);padding-top:16px;min-width:0}
.ai-step__n{font:500 12px/1 var(--label);letter-spacing:.14em;color:var(--muted)}
.ai-step__t{font-size:clamp(20px,1.6vw,24px);line-height:1.2;font-weight:500;color:var(--fg)}
.ai-step__p{font-size:15.5px;line-height:1.5;color:var(--muted);max-width:30ch;text-wrap:pretty}
@media (min-width:760px){ .ai-method{grid-template-columns:repeat(5,minmax(0,1fr))} }
@media (max-width:759px){ .ai-method{grid-template-columns:repeat(2,minmax(0,1fr))} .ai-step:last-child{grid-column:1/-1} }
.ai-authorship{margin-top:clamp(32px,4vw,64px)!important;font-size:clamp(17px,1.3vw,20px);line-height:1.5;color:var(--fg);max-width:52ch;text-wrap:pretty;border-top:1px solid var(--rule);padding-top:clamp(20px,2.4vw,32px)}
.ai-authorship b{font-weight:500}

/* ----------------------------------------------------------- the chapters -- */
.ai-index{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:clamp(24px,3vw,44px);font:500 13px/1.4 var(--label);letter-spacing:.1em;text-transform:uppercase}
.ai-index a{color:var(--muted);text-decoration:none;border-bottom:1px solid var(--rule);padding-bottom:2px}
.ai-index a:hover{color:var(--fg);border-bottom-color:currentColor}
.ai-chap{--btn-bg:var(--fg);--btn-fg:var(--bg);--link:var(--fg);background:var(--bg);color:var(--fg);padding:clamp(56px,7vw,112px) 0 clamp(48px,6vw,96px);scroll-margin-top:calc(var(--cs-head) + 8px)}
.ai-chap+.ai-chap{border-top:1px solid rgba(0,0,0,.25)}
.ai-chap__head{display:grid;gap:clamp(14px,1.6vw,22px);margin-bottom:clamp(28px,3.4vw,48px)}
.ai-chap__n{font:500 12px/1 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ai-chap__title{font-family:var(--display);font-weight:300;letter-spacing:-.022em;line-height:1;font-size:clamp(40px,5.6vw,88px)}
.ai-chap__move{font-size:clamp(19px,1.7vw,27px);line-height:1.34;font-weight:300;max-width:34ch;text-wrap:pretty;color:var(--fg)}
.ai-chap__grid{display:grid;gap:clamp(28px,3.4vw,52px) var(--cs-gap);align-items:start}
@media (min-width:980px){ .ai-chap__grid{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr)} .ai-chap__grid--rev>.ai-chap__side{order:-1} }
.ai-chap__side{display:grid;gap:clamp(18px,2vw,28px);align-content:start}
.ai-chap__sum{font-size:clamp(16px,1.25vw,19px);line-height:1.55;color:var(--fg);max-width:44ch;text-wrap:pretty}
.ai-meta{display:grid;gap:8px;font-size:14px;line-height:1.5;color:var(--muted)}
.ai-meta div{display:grid;gap:2px;border-top:1px solid var(--rule);padding-top:8px}
.ai-meta dt{font:500 11.5px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ai-meta dd{color:var(--fg)}
.ai-meta a{color:inherit;text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-meta a:hover{border-bottom-color:currentColor}
.ai-chap .cs-film{max-width:none}
.ai-chap .cs-frame video{object-fit:cover}
.ai-chap .cs-film.is-sound .cs-frame video{object-fit:contain}
.ai-chap .cs-play{left:auto;right:clamp(12px,1.4vw,20px);bottom:clamp(12px,1.4vw,20px);top:auto}
.ai-chap .cs-film[data-fmt="phone"] .cs-frame{width:100%}
/* two static artifacts on one baseline: mixed ratios share a height */
.ai-art{display:flex;flex-wrap:wrap;gap:clamp(12px,1.6vw,24px);margin-top:clamp(20px,2.4vw,32px);align-items:flex-start}
.ai-art figure{display:grid;gap:10px;min-width:0;max-width:100%}
.ai-art img{height:clamp(220px,26vw,400px);width:auto;max-width:100%;display:block;background:rgba(127,127,127,.12);outline:1px solid var(--rule);outline-offset:-1px;cursor:zoom-in}
.ai-art figcaption{font-size:13.5px;line-height:1.45;color:var(--muted);max-width:40ch;text-wrap:pretty}
@media (max-width:759px){ .ai-art img{height:auto;width:100%} .ai-art figure{width:100%} }
.ai-chap__acts{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;margin-top:clamp(28px,3.2vw,44px)}
.ai-inspect{display:inline-flex;align-items:center;gap:12px;min-height:50px;padding:0 24px;border:1px solid var(--fg);background:transparent;color:var(--fg);font:500 14px/1 var(--body);letter-spacing:.02em;text-decoration:none;cursor:pointer;transition:background .2s,color .2s}
.ai-inspect:hover,.ai-inspect[aria-expanded="true"]{background:var(--fg);color:var(--bg)}
.ai-inspect svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;transition:transform .25s}
.ai-inspect[aria-expanded="true"] svg{transform:rotate(45deg)}
.ai-inspect:focus-visible{outline:2px solid currentColor;outline-offset:3px}

/* the library region: filled by the script from the brand's own page, or reached by the link without it */
.ai-lib{margin-top:clamp(32px,4vw,64px);border-top:1px solid var(--rule);padding-top:clamp(24px,3vw,44px)}
.ai-lib[hidden]{display:none}
.ai-lib__head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:10px 24px;margin-bottom:clamp(20px,2.4vw,32px)}
.ai-lib__h{font-family:var(--display);font-weight:300;letter-spacing:-.016em;font-size:clamp(26px,2.6vw,40px);line-height:1.05}
.ai-lib__own{font-size:13.5px;color:var(--muted)}
.ai-lib__own a{color:inherit;text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-lib__own a:hover{color:var(--fg);border-bottom-color:currentColor}
.ai-lib__loading{font-size:14px;color:var(--muted);padding:12px 0}
.ai-tabs__list{display:flex;flex-wrap:wrap;gap:0;border:0;border-bottom:1px solid var(--rule);margin-bottom:clamp(24px,3vw,44px);width:100%}
.ai-tabs__tab{appearance:none;border:0;background:transparent;color:var(--muted);font:500 13px/1.2 var(--label);letter-spacing:.1em;text-transform:uppercase;padding:14px 16px 12px;margin-bottom:-1px;border-bottom:2px solid transparent;cursor:pointer;white-space:nowrap}
.ai-tabs__tab[aria-selected="true"]{color:var(--fg);border-bottom-color:var(--fg)}
.ai-tabs__tab:hover{color:var(--fg)}
.ai-tabs__tab:focus-visible{outline:2px solid currentColor;outline-offset:-4px}
.ai-tabs [role="tabpanel"][hidden]{display:none}
.ai-tabs__list[hidden]{display:none}
.ai-panel{display:grid;gap:clamp(24px,3vw,44px)}
.ai-panel__h{font:500 12px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ai-panel__note{font-size:14.5px;line-height:1.55;color:var(--muted);max-width:62ch;text-wrap:pretty}
.ai-panel__note a{color:var(--fg);text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-panel__note a:hover{border-bottom-color:currentColor}
html.no-js .ai-tabs__list{display:none}
html.no-js .ai-panel+.ai-panel{margin-top:clamp(40px,5vw,72px);border-top:1px solid var(--rule);padding-top:clamp(24px,3vw,40px)}

/* strategy */
.ai-strat{display:grid;gap:clamp(18px,2.2vw,32px) var(--cs-gap);margin-bottom:clamp(28px,3.4vw,52px)}
@media (min-width:900px){ .ai-strat{grid-template-columns:repeat(3,minmax(0,1fr))} }
.ai-strat div{display:grid;gap:10px;border-top:1px solid var(--rule);padding-top:14px;align-content:start}
.ai-strat h4{font:500 12px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ai-strat p{font-size:15.5px;line-height:1.55;color:var(--fg);max-width:36ch;text-wrap:pretty}
.ai-expr{font-family:var(--display);font-weight:300;letter-spacing:-.02em;font-size:clamp(30px,3.6vw,56px);line-height:1.02;max-width:18ch;text-wrap:balance;margin-bottom:clamp(24px,3vw,44px)}
.ai-truth{font-size:13.5px;line-height:1.5;color:var(--muted);max-width:60ch;border-left:2px solid var(--rule);padding-left:14px}

/* the brand idea, in the chapter */
.ai-idea{display:grid;gap:12px;margin-top:clamp(36px,4.4vw,64px);border-top:1px solid var(--rule);padding-top:clamp(20px,2.4vw,32px)}
.ai-idea__move{font-family:var(--display);font-weight:300;letter-spacing:-.02em;font-size:clamp(30px,3.6vw,56px);line-height:1.02;max-width:18ch;text-wrap:balance}
.ai-idea__p{font-size:clamp(16px,1.25vw,19px);line-height:1.55;color:var(--fg);max-width:52ch;text-wrap:pretty}

/* colour: anchors and the continuum */
.ai-sw{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:clamp(10px,1.2vw,18px)}
.ai-sw li{display:grid;gap:8px;min-width:0}
.ai-sw i{display:block;aspect-ratio:4/3;background:var(--c);outline:1px solid var(--rule);outline-offset:-1px}
.ai-sw b{font-weight:500;font-size:14px;color:var(--fg)}
.ai-sw .ai-hex{display:inline-flex;align-items:center;gap:8px;appearance:none;border:0;padding:0;background:none;color:var(--muted);font:400 13px/1.3 ui-monospace,Menlo,monospace;letter-spacing:.04em;cursor:pointer;text-align:left}
.ai-sw .ai-hex:hover{color:var(--fg)}
.ai-sw .ai-hex:focus-visible{outline:2px solid currentColor;outline-offset:3px}
.ai-sw small{font-size:12.5px;line-height:1.4;color:var(--muted)}
.ai-sw [data-standing="proposed"] small::before{content:'Proposed · '}
.ai-copied{font-size:12px;color:var(--fg);opacity:0;transition:opacity .2s}
.ai-copied.is-on{opacity:1}
/* the Color–Tone Continuum: three tiers in the mode's own tokens; the other mode's set waits, hidden, for the toggle */
.ai-cont{display:grid;gap:clamp(10px,1.2vw,16px);list-style:none;padding:0;margin:0}
@media (min-width:760px){ .ai-cont{grid-template-columns:repeat(3,minmax(0,1fr))} }
.ai-cont li{display:grid;gap:14px;align-content:space-between;min-height:200px;padding:20px;background:var(--c-bg);color:var(--c-fg);outline:1px solid var(--c-line);outline-offset:-1px;font-family:var(--t-text,inherit)}
.ai-cont__lvl{font:500 11px/1.3 ui-monospace,Menlo,monospace;letter-spacing:.12em;text-transform:uppercase;opacity:.72}
.ai-cont__name{font-size:clamp(20px,1.6vw,26px);line-height:1.15;font-weight:500;text-wrap:balance}
.ai-cont__p{font-size:13.5px;line-height:1.45;opacity:.84;text-wrap:pretty}
.ai-cont__act{background:linear-gradient(160deg,var(--c-bg) 0 55%,var(--c-line))}
[data-mode="light"] .ai-cont--dark,[data-mode="dark"] .ai-cont--light{display:none}
html.no-js .ai-cont-wrap{display:grid;gap:12px} html.no-js .ai-cont--dark{display:grid!important}

/* shape grammar: the five primitives in the ink, with their jobs */
.ai-shapes{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:clamp(12px,1.4vw,20px);list-style:none;padding:0;margin:0}
.ai-shapes li{display:grid;gap:8px;min-width:0;align-content:start}
.ai-shapes a{display:grid;place-items:center;aspect-ratio:4/3;padding:18px;background:rgba(127,127,127,.08);outline:1px solid var(--rule);outline-offset:-1px;color:var(--accent);text-decoration:none}
.ai-shapes a:hover{background:rgba(127,127,127,.14)}
.ai-shapes a:focus-visible{outline:2px solid currentColor;outline-offset:2px}
.ai-shape__svg{width:100%;max-height:96px;height:auto;display:block;overflow:visible}
.ai-shape__svg .l-construction{display:none}
.ai-shapes b{font-weight:500;font-size:14px;color:var(--fg)}
.ai-shapes small{font-size:12.5px;line-height:1.4;color:var(--muted)}
.ai-material{display:grid;grid-template-columns:minmax(0,220px) minmax(0,1fr);gap:clamp(16px,2vw,28px);align-items:center}
.ai-material i{display:block;aspect-ratio:16/7;background:linear-gradient(160deg,var(--top) 0 45%,var(--bottom));box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 8px 18px rgba(0,0,0,.18);outline:1px solid var(--rule);outline-offset:-1px}
.ai-material .ai-hex{display:inline;appearance:none;border:0;padding:0;background:none;color:var(--fg);font:400 13px/1.3 ui-monospace,Menlo,monospace;letter-spacing:.04em;cursor:pointer;border-bottom:1px solid var(--rule)}
.ai-material .ai-hex:hover{border-bottom-color:currentColor}
.ai-material .ai-hex:focus-visible{outline:2px solid currentColor;outline-offset:3px}
@media (max-width:759px){ .ai-material{grid-template-columns:1fr} }

/* typography */
.ai-type{display:grid;gap:clamp(24px,3vw,44px)}
.ai-type__spec{display:grid;gap:clamp(14px,1.6vw,22px);padding:clamp(24px,3vw,44px);background:var(--c-bg);color:var(--c-fg);outline:1px solid var(--rule);outline-offset:-1px}
.ai-type__d{font-family:var(--t-display);font-size:clamp(40px,5.2vw,92px);line-height:.96;letter-spacing:-.01em;font-weight:700;text-transform:var(--t-case);text-wrap:balance;max-width:14ch}
.ai-type__d--real{font-weight:var(--d-w,700)}
.ai-type__k{font-family:var(--t-text);font-size:clamp(20px,1.8vw,30px);line-height:1.3;font-weight:var(--b-w,400);max-width:28ch;text-wrap:pretty}
.ai-type__b{font-family:var(--t-text);font-size:clamp(16px,1.2vw,18.5px);line-height:1.55;max-width:56ch;opacity:.86;text-wrap:pretty;font-weight:var(--b-w,400)}
.ai-type__m{font-family:var(--t-text,var(--t-label));font-size:12.5px;line-height:1.4;letter-spacing:.12em;text-transform:uppercase;opacity:.7}
.ai-type__files{display:grid;gap:4px;font-size:14px}
.ai-type__files a{color:var(--fg);text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-type__files a:hover{border-bottom-color:currentColor}
.ai-type__roles{display:grid;gap:clamp(12px,1.4vw,20px) var(--cs-gap)}
@media (min-width:760px){ .ai-type__roles{grid-template-columns:repeat(3,minmax(0,1fr))} }
.ai-type__roles div{display:grid;gap:6px;border-top:1px solid var(--rule);padding-top:12px}
.ai-type__roles dt{font:500 11.5px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ai-type__roles dd{font-size:15px;line-height:1.45;color:var(--fg)}
.ai-type__roles dd small{display:block;color:var(--muted);font-size:13px}
.ai-scale{display:grid;gap:8px;font-size:14px;line-height:1.5;color:var(--muted);border-top:1px solid var(--rule);padding-top:14px}
.ai-scale b{color:var(--fg);font-weight:500}

/* the library panels: a row with a control at the right */
.ai-panel__row{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 24px}
.ai-panel__sub{font:500 12px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--fg);margin-top:clamp(12px,1.4vw,20px)!important;border-top:1px solid var(--rule);padding-top:14px}
.ai-moved{font-size:clamp(18px,1.5vw,24px);line-height:1.35;font-weight:300;color:var(--fg);max-width:36ch;text-wrap:pretty}
.ai-moved b{font-weight:500}
.ai-modes{margin:0}
.ai-modes[hidden]{display:none}

/* the experience: the desktop and phone compositions, as artwork */
.ai-screens,.ai-exp__screens{display:grid;gap:clamp(12px,1.6vw,24px);align-items:start}
@media (min-width:760px){ .ai-screens,.ai-exp__screens{grid-template-columns:minmax(0,1440fr) minmax(0,430fr)} }
@media (max-width:759px){ .ai-screen--phone{order:-1} }
.ai-screen{display:grid;gap:10px;min-width:0}
.ai-screen img{width:100%;height:auto;display:block;outline:1px solid var(--rule);outline-offset:-1px;background:rgba(127,127,127,.06);cursor:zoom-in}
.ai-screen figcaption{font-size:13px;line-height:1.4;color:var(--muted)}
.ai-exp{display:grid;gap:clamp(18px,2.2vw,32px);margin-top:clamp(36px,4.4vw,64px)}
.ai-exp__words{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:14px 28px}
.ai-exp__words>div{display:grid;gap:10px}
.ai-exp .ai-sample{margin-top:0;gap:clamp(10px,1.2vw,16px)}
.ai-board--entry{margin-top:clamp(8px,1vw,16px)}

/* a curated sample of controls (in the chapter) and the full inventory (in the library) */
.ai-sample{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(10px,1.2vw,16px);margin-top:clamp(20px,2.4vw,32px);list-style:none;padding:0}
@media (max-width:759px){ .ai-sample{grid-template-columns:1fr} }
.ai-comp{display:grid;gap:8px;min-width:0;list-style:none;content-visibility:auto;contain-intrinsic-size:auto 320px}
.ai-comp__svg{display:block}
.ai-comp__svg svg{width:100%;height:auto;display:block;outline:1px solid var(--rule);outline-offset:-1px}
.ai-comp__svg[data-mode="dark"]{display:none}
.ai-comps[data-mode="dark"] .ai-comp__svg[data-mode="dark"]{display:block}
.ai-comps[data-mode="dark"] .ai-comp__svg[data-mode="light"]{display:none}
.ai-comp figcaption{display:grid;gap:3px;font-size:13px;line-height:1.4;color:var(--muted)}
.ai-comp figcaption b{font:400 11.5px/1 ui-monospace,Menlo,monospace;letter-spacing:.04em;color:var(--muted);margin-right:6px}
.ai-comp figcaption span:first-child{color:var(--fg);font-weight:500}
.ai-comp__job{font-size:12.5px}
.ai-comp__dl{display:flex;flex-wrap:wrap;gap:4px 12px;font:400 11.5px/1.4 ui-monospace,Menlo,monospace;letter-spacing:.03em}
.ai-comp__dl a{color:var(--muted);text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-comp__dl a:hover{color:var(--fg);border-bottom-color:currentColor}
/* the presentation-state rules the SVGs carried, once for the page (the files still carry their own) */
.ai-comp svg text{text-rendering:geometricPrecision}
.ai-comp svg .state{display:none}
.ai-comp svg:not([data-state]) .state-default,.ai-comp svg[data-state="default"] .state-default,.ai-comp svg[data-state="hover"] .state-hover,.ai-comp svg[data-state="focus"] .state-focus,.ai-comp svg[data-state="active"] .state-active,.ai-comp svg[data-state="disabled"] .state-disabled,.ai-comp svg[data-state="loading"] .state-loading{display:inline}
.ai-comps[data-grid="on"] .l-construction,.ai-icons[data-grid="on"] .l-construction{display:inline!important}
.ai-tools{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center}
.ai-tools .cs-seg{margin:0}
.ai-tools .cs-seg[hidden]{display:none}
.ai-tog{display:inline-flex;align-items:center;gap:10px;appearance:none;border:1px solid var(--rule);background:transparent;color:var(--fg);font:500 12px/1 var(--label);letter-spacing:.1em;text-transform:uppercase;padding:11px 14px;cursor:pointer}
.ai-tog[aria-pressed="true"]{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.ai-tog:focus-visible{outline:2px solid currentColor;outline-offset:3px}
.ai-find input{appearance:none;border:1px solid var(--rule);background:transparent;color:var(--fg);font:400 14px/1.2 var(--body);padding:10px 12px;min-width:200px;border-radius:0}
.ai-find input:focus-visible{outline:2px solid currentColor;outline-offset:2px}
.ai-comps{display:grid;gap:clamp(28px,3.2vw,44px)}
.ai-comps__g{display:grid;gap:14px}
.ai-comps__g[hidden]{display:none}
.ai-comps__gh{font:500 12px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);border-top:1px solid var(--rule);padding-top:12px}
.ai-comps__gh span{opacity:.6;margin-left:6px}
.ai-comps__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:clamp(12px,1.4vw,20px);list-style:none;padding:0}
.ai-comp[hidden]{display:none}
.ai-comps__empty{font-size:14px;color:var(--muted)}
.ai-comps__empty[hidden]{display:none}
.ai-find__count{font-size:13px;color:var(--muted)}

/* the native control lab: working HTML in the brand's tokens, in either mode */
.ai-lab{--bg:var(--l-bg);--panel:var(--l-panel);--panel2:var(--l-panel2);--ink:var(--l-ink);--mut:var(--l-muted);--line:var(--l-line);--ac:var(--l-accent);--btn:var(--l-button);--on:var(--l-on);--ok:var(--l-success);--bad:var(--l-error);
  position:relative;background:var(--bg);color:var(--ink);padding:clamp(18px,2.4vw,32px);outline:1px solid var(--line);outline-offset:-1px;font-family:var(--t-text),system-ui,sans-serif;font-size:15px;line-height:1.5}
[data-mode="dark"] .ai-lab{--bg:var(--d-bg);--panel:var(--d-panel);--panel2:var(--d-panel2);--ink:var(--d-ink);--mut:var(--d-muted);--line:var(--d-line);--ac:var(--d-accent);--btn:var(--d-button);--on:var(--d-on);--ok:var(--d-success);--bad:var(--d-error)}
.ai-lab *{box-sizing:border-box;min-width:0}
.ai-lab__grid{display:grid;gap:clamp(16px,2vw,28px)}
@media (min-width:900px){ .ai-lab__grid{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);align-items:start} }
.ai-lab__col{display:grid;gap:clamp(16px,2vw,28px)}
.ai-lab__panel{display:grid;gap:14px;align-content:start;background:var(--panel);color:var(--ink);padding:clamp(18px,2vw,28px);border-radius:var(--lab-r);outline:1px solid var(--line);outline-offset:-1px;box-shadow:0 10px 26px rgba(0,0,0,.07)}
.ai-lab__t{font-family:var(--t-display),var(--t-text),sans-serif;font-weight:var(--d-w,700);font-size:clamp(20px,1.7vw,26px);line-height:1.15;letter-spacing:-.01em;color:var(--ink)}
.ai-lab__lead{color:var(--mut);font-size:15px}
.ai-lab__field{display:grid;gap:6px}
.ai-lab__field label,.ai-lab__field>span:not(.ai-lab__hint):not(.ai-lab__err){font-weight:600;font-size:13.5px;color:var(--ink)}
.ai-lab__field label output{font-weight:400;color:var(--mut);margin-left:8px}
.ai-lab input:not([type=checkbox]):not([type=range]),.ai-lab select,.ai-lab textarea{width:100%;font:inherit;color:var(--ink);background:var(--panel2);border:1px solid var(--line);border-radius:calc(var(--lab-r) * .6);padding:11px 12px;min-height:44px}
.ai-lab textarea{resize:vertical}
.ai-lab select{appearance:auto}
.ai-lab input:focus-visible,.ai-lab select:focus-visible,.ai-lab textarea:focus-visible,.ai-lab button:focus-visible,.ai-lab summary:focus-visible{outline:2px solid var(--ac);outline-offset:2px}
.ai-lab input:user-invalid,.ai-lab .is-invalid{border-color:var(--bad);box-shadow:0 0 0 1px var(--bad) inset}
.ai-lab__hint{font-size:12.5px;color:var(--mut)}
.ai-lab__err{font-size:12.5px;color:var(--bad);font-weight:600}
.ai-lab__err:empty{display:none}
.ai-lab__switch{display:flex;align-items:center;gap:12px;min-height:44px;cursor:pointer;font-size:14px}
.ai-lab__switch input{appearance:none;width:46px;height:26px;border-radius:13px;background:var(--line);position:relative;margin:0;cursor:pointer;transition:background .2s;flex:none}
.ai-lab__switch input::after{content:'';position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.35);transition:transform .2s}
.ai-lab__switch input:checked{background:var(--btn)}
.ai-lab__switch input:checked::after{transform:translateX(20px)}
.ai-lab__switch b{font-weight:600;color:var(--mut);min-width:2.4em}
.ai-lab input[type=range]{width:100%;accent-color:var(--btn);min-height:44px;margin:0}
.ai-lab__stepper>span{display:flex;align-items:center;gap:8px}
.ai-lab .ai-lab__stepper input[type=number]{width:88px;flex:none;text-align:center}
.ai-lab__stepper button{width:44px;height:44px;flex:none;font:inherit;font-size:20px;color:var(--ink);background:var(--panel2);border:1px solid var(--line);border-radius:calc(var(--lab-r) * .6);cursor:pointer}
.ai-lab__stepper button:hover{border-color:var(--ac)}
.ai-lab__acts{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center}
.ai-lab__primary,.ai-lab__secondary{font:inherit;font-weight:600;font-size:14.5px;min-height:44px;padding:0 20px;border-radius:calc(var(--lab-r) * .6);cursor:pointer;border:1px solid transparent}
.ai-lab__primary{color:var(--on);background:linear-gradient(160deg,var(--l-top) 0 45%,var(--l-bottom));box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 3px 8px rgba(0,0,0,.18)}
.ai-lab__primary:hover{filter:brightness(1.06)}
.ai-lab__primary:active{transform:translateY(1px)}
.ai-lab__secondary{color:var(--ink);background:var(--panel);border-color:var(--line)}
.ai-lab__secondary:hover{border-color:var(--ac)}
.ai-lab__status{font-size:13px;color:var(--mut)}
.ai-lab__status.is-saved{color:var(--ok);font-weight:600}
.ai-lab__tabs{display:flex;gap:4px;border-bottom:1px solid var(--line)}
.ai-lab__tabs button{font:inherit;font-weight:600;font-size:14px;color:var(--mut);background:none;border:0;border-bottom:2px solid transparent;margin-bottom:-1px;padding:10px 12px;min-height:44px;cursor:pointer}
.ai-lab__tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--btn)}
.ai-lab__tabcopy{font-size:15px;color:var(--ink);min-height:2.4em}
.ai-lab__details summary{cursor:pointer;font-weight:600;font-size:14px;min-height:44px;display:flex;align-items:center}
.ai-lab__details p{font-size:14px;color:var(--mut);padding-bottom:8px}
.ai-lab__table{width:100%;border-collapse:collapse;font-size:14px}
.ai-lab__table th,.ai-lab__table td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}
.ai-lab__table th{font-size:12.5px;font-weight:600;color:var(--mut)}
.ai-lab__table tr[hidden]{display:none}
.ai-lab__sort{font:inherit;font-size:12.5px;font-weight:600;color:var(--ink);background:none;border:0;padding:0;cursor:pointer;min-height:24px}
.ai-lab__empty{font-size:13.5px;color:var(--mut)}
.ai-lab__empty[hidden]{display:none}
.ai-lab__bar{height:8px;background:var(--panel2);border-radius:4px;overflow:hidden;outline:1px solid var(--line);outline-offset:-1px}
.ai-lab__bar i{display:block;height:100%;width:var(--p);background:linear-gradient(90deg,var(--l-top),var(--l-bottom))}
.ai-lab__dialog{border:0;border-radius:var(--lab-r);padding:clamp(20px,2.4vw,32px);max-width:min(92vw,480px);background:var(--panel);color:var(--ink);font:inherit;box-shadow:0 24px 64px rgba(0,0,0,.35);display:grid;gap:14px}
.ai-lab__dialog:not([open]){display:none}
.ai-lab__dialog::backdrop{background:rgba(0,0,0,.45)}
.ai-lab__toast{position:sticky;bottom:12px;margin:16px auto 0;width:max-content;max-width:100%;padding:10px 16px;background:var(--ink);color:var(--bg);border-radius:calc(var(--lab-r) * .6);font-size:13.5px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.ai-lab__toast[hidden]{display:none}

/* across the brand: the R4 specimens */
.ai-r4ch{display:grid;gap:clamp(16px,2vw,28px) var(--cs-gap)}
@media (min-width:900px){ .ai-r4ch{grid-template-columns:minmax(0,760fr) minmax(0,1080fr);align-items:start} }
.ai-r4ch figure{display:grid;gap:8px;min-width:0}
.ai-r4ch img{width:100%;height:auto;display:block;outline:1px solid var(--rule);outline-offset:-1px;background:rgba(127,127,127,.06);cursor:zoom-in}
.ai-r4ch figcaption{font-size:13px;line-height:1.4;color:var(--muted)}
.ai-r4ch figcaption a{color:var(--fg);text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-r4ch__mail{max-width:520px}
.ai-r4ch__ab{display:grid;gap:12px;align-content:start}
.ai-methodlist{display:grid;gap:10px;font-size:15px;line-height:1.55;color:var(--muted);max-width:70ch;padding-left:1.2em}
.ai-methodlist b{color:var(--fg);font-weight:500}
.ai-dl__folders{font-size:14px!important}
.ai-dl__folders code{font:400 12.5px/1.4 ui-monospace,Menlo,monospace;color:var(--fg)}

/* icons: inline, currentColor, on the brand's panel */
.ai-icons{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:clamp(8px,1vw,14px);padding:clamp(14px,1.6vw,24px);background:var(--c-bg);color:var(--c-fg);outline:1px solid var(--rule);outline-offset:-1px;list-style:none}
.ai-icons li{min-width:0}
.ai-icons a{display:grid;gap:8px;justify-items:center;color:inherit;text-decoration:none;padding:8px 4px}
.ai-icons a:hover .ai-ic__n,.ai-icons a:focus-visible .ai-ic__n{text-decoration:underline}
.ai-icons a:focus-visible{outline:2px solid currentColor;outline-offset:2px}
.ai-icons svg{width:44px;height:44px;display:block;overflow:visible}
.ai-icons .l-construction{display:none}
.ai-ic__n{font:400 11.5px/1.3 ui-monospace,Menlo,monospace;letter-spacing:.04em;opacity:.72}

/* colour: the two modes side by side, then the established brand colours */
.ai-modes2{display:grid;gap:clamp(12px,1.4vw,20px)}
@media (min-width:900px){ .ai-modes2{grid-template-columns:repeat(2,minmax(0,1fr))} }
.ai-mode{padding:clamp(16px,1.8vw,24px);background:var(--m-bg);color:var(--m-ink);outline:1px solid var(--m-line);outline-offset:-1px;display:grid;gap:14px}
.ai-mode__h{font:500 12px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;opacity:.75}
.ai-sw--mode{grid-template-columns:repeat(auto-fill,minmax(96px,1fr))}
.ai-sw--mode i{aspect-ratio:3/2;outline:1px solid var(--m-line)}
.ai-sw--mode b{color:inherit;font-size:12.5px}
.ai-sw--mode .ai-hex{color:inherit;opacity:.75}
.ai-sw--mode .ai-hex:hover{opacity:1}

/* typography in the R3 faces */
.ai-type__d--r3{font-weight:700;letter-spacing:-.01em}
/* channels: email, social, homepage */
.ai-mails{display:grid;gap:var(--cs-gap)}
@media (min-width:760px){ .ai-mails{grid-template-columns:repeat(3,minmax(0,1fr))} }
.ai-mails .cs-mail figcaption{display:grid;gap:6px}
.ai-mails .cs-mail__subj{font-size:15px;line-height:1.35;color:var(--fg)}
.ai-board{display:grid;gap:12px}
.ai-board svg,.ai-board img{width:100%;height:auto;display:block;outline:1px solid var(--rule);outline-offset:-1px;background:#0b0b0b}
.ai-board figcaption{font-size:13.5px;line-height:1.45;color:var(--muted);max-width:60ch}
.ai-social{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(10px,1.2vw,16px)}
@media (min-width:760px){ .ai-social{grid-template-columns:repeat(4,minmax(0,1fr))} }
.ai-social figure{display:grid;gap:8px;min-width:0}
.ai-social img{width:100%;aspect-ratio:4/5;object-fit:cover;display:block;background:rgba(127,127,127,.12);outline:1px solid var(--rule);outline-offset:-1px;cursor:zoom-in}
.ai-social figcaption{font:400 12px/1.3 ui-monospace,Menlo,monospace;letter-spacing:.03em;color:var(--muted)}
.ai-social--ab{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (min-width:760px){ .ai-social--ab{grid-template-columns:repeat(2,minmax(0,1fr))} }
.ai-ab{display:grid;gap:clamp(16px,2vw,28px) var(--cs-gap)}
@media (min-width:980px){ .ai-ab{grid-template-columns:repeat(2,minmax(0,1fr))} }
.ai-ab__pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(8px,1vw,14px)}
.ai-ab__n{font:500 11.5px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.ai-shots{display:grid;gap:clamp(12px,1.6vw,24px)}
@media (min-width:760px){ .ai-shots{grid-template-columns:minmax(0,3fr) minmax(0,1fr);align-items:start} .ai-shots--pair{grid-template-columns:repeat(2,minmax(0,3fr))} }
.ai-shots figure{display:grid;gap:8px;min-width:0}
.ai-shots img{width:100%;height:auto;display:block;outline:1px solid var(--rule);outline-offset:-1px;background:rgba(127,127,127,.12);cursor:zoom-in}
.ai-shots figcaption{font-size:13px;line-height:1.4;color:var(--muted)}
.ai-links{display:flex;flex-wrap:wrap;gap:12px 28px}

/* films inside a library */
.ai-films{display:grid;gap:clamp(36px,4vw,56px) var(--cs-gap)}
@media (min-width:900px){ .ai-films{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start} .ai-films .ai-film-cell:has(.ai-film--lead){grid-column:1/-1} }
.ai-film .cs-film__cap{margin-top:12px}
.ai-film__line{margin-top:10px;font-size:15px;line-height:1.45;color:var(--muted);max-width:52ch}
.ai-film__files{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:8px;font-size:13px;color:var(--muted)}
.ai-film__files a{color:inherit;text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-film__files a:hover{color:var(--fg);border-bottom-color:currentColor}

/* downloads and provenance */
.ai-dl{display:grid;gap:clamp(16px,2vw,28px) var(--cs-gap)}
@media (min-width:900px){ .ai-dl{grid-template-columns:repeat(2,minmax(0,1fr))} }
.ai-dl div{display:grid;gap:10px;border-top:1px solid var(--rule);padding-top:14px;align-content:start}
.ai-dl h4{font:500 11.5px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ai-dl ul{display:grid;gap:6px;font-size:14.5px;line-height:1.5}
.ai-dl a{color:var(--fg);text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-dl a:hover{border-bottom-color:currentColor}
.ai-dl p{font-size:14px;line-height:1.55;color:var(--muted);max-width:60ch}
.ai-tokens{position:relative;font:400 12.5px/1.5 ui-monospace,Menlo,monospace;color:var(--muted);background:rgba(127,127,127,.08);outline:1px solid var(--rule);outline-offset:-1px;padding:16px;max-height:320px;overflow:auto;white-space:pre;tab-size:2}
.ai-copy{display:inline-flex;align-items:center;gap:10px;appearance:none;border:1px solid var(--rule);background:transparent;color:var(--fg);font:500 12.5px/1 var(--label);letter-spacing:.1em;text-transform:uppercase;padding:11px 14px;cursor:pointer}
.ai-copy:hover{border-color:currentColor}
.ai-copy:focus-visible{outline:2px solid currentColor;outline-offset:3px}

/* the standalone library page */
.ai-libpage main{background:var(--bg);color:var(--fg)}
.ai-libpage .ai-lib{border-top:0;margin-top:0;padding-top:0}
.ai-libpage__head{padding:clamp(40px,5vw,72px) 0 clamp(24px,3vw,44px);display:grid;gap:12px}
.ai-libpage__k{font:500 12px/1.4 var(--label);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ai-libpage__k a{color:inherit;text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-libpage__k a:hover{color:var(--fg);border-bottom-color:currentColor}
.ai-libpage__t{font-family:var(--display);font-weight:300;letter-spacing:-.022em;font-size:clamp(36px,5vw,76px);line-height:1}

/* the supporting line and notes */
.ai-support{font-size:14.5px;line-height:1.55;color:var(--muted);max-width:60ch}
.ai-support a{color:var(--fg);text-decoration:none;border-bottom:1px solid var(--rule)}
.ai-support a:hover{border-bottom-color:currentColor}

@media (prefers-reduced-motion:reduce){ .ai-inspect svg,.ai-inspect,.ai-icons .l-construction,.ai-copied{transition:none} }
@media (max-width:759px){
  .ai-art{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ai-hero .cs-play{right:12px;bottom:12px}
  .ai-hero .cs-hold{left:12px;bottom:12px}
  .ai-cont li{min-height:160px}
}