/* Case-specific compositions preserve the real prototype photos and square CAD plates. */
.iris-project .sec-title .zh{display:inline-block;white-space:nowrap}
.iris-role{margin-top:18px;font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.08em;color:var(--accent);line-height:1.9}
.iris-role span{display:block;color:var(--ink-soft)}
.iris-opening{grid-template-columns:minmax(280px,.85fr) minmax(0,1.15fr);max-width:1120px}
.iris-opening .opening-visual{max-width:440px}
.iris-action{display:inline-flex;align-items:center;gap:24px;margin-top:28px;padding:13px 18px;border:1px solid var(--accent);font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;color:var(--accent);text-decoration:none}
.iris-action:hover{background:var(--accent);color:var(--paper)}
.iris-process-link{display:block;width:fit-content;margin-top:16px;padding:6px 0;color:var(--ink-soft);font-size:14px;line-height:1.5;text-underline-offset:5px}
.iris-process-link:hover{color:var(--accent)}
.iris-process-link:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.iris-demo-grid{display:grid;grid-template-columns:minmax(260px,.72fr) minmax(0,1.28fr);gap:clamp(36px,7vw,100px);max-width:1080px;margin:auto;align-items:center}
.iris-demo-figure{width:100%;max-width:360px;justify-self:center}
.iris-demo-figure .fig-tag{pointer-events:none}
.iris-chapters{display:grid;margin-top:30px;border-top:1px solid var(--line)}
.iris-chapters button{display:flex;align-items:center;gap:18px;width:100%;padding:17px 2px;text-align:left;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--ink);font:inherit;cursor:pointer}
.iris-chapters button:hover{background:var(--card)}
.iris-chapters button:focus-visible,.iris-action:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.iris-play{display:grid;place-items:center;flex-shrink:0;width:34px;height:34px;border:1px solid var(--accent);border-radius:50%;font-size:11px;color:var(--accent)}
.iris-chapters b{display:block;font-weight:500;font-size:17px;line-height:1.3}
.iris-chapters small{display:block;font-family:'IBM Plex Mono',monospace;font-size:9px;letter-spacing:.08em;color:var(--ink-soft);margin-top:6px}
.iris-media-status{font-size:13px;color:var(--ink-soft)}
.iris-media-status:not(:empty){margin-top:12px}
.iris-decision{border-left:2px solid var(--accent);padding:0 0 0 20px;margin-top:32px}
.iris-decision .case-kicker{margin-bottom:9px}
.iris-decision p{font-size:15px;color:var(--ink-soft);line-height:1.65}
.iris-exploded-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:clamp(32px,5vw,72px);align-items:center;max-width:1200px;margin:auto}
.iris-exploded-grid .case-lead p{font-size:clamp(28px,2.7vw,38px)}
.iris-cad{background:#f2f0ea}
.iris-cad .fig-tag{background:#f2f0ea;color:#514866;border:1px solid #cec9d3}
.iris-parts{margin-top:24px}
.iris-parts>div{border-top:1px solid var(--line)}
.iris-parts button{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;width:100%;padding:14px 10px 14px 0;border:0;background:transparent;color:var(--ink);text-align:left;font-family:'Archivo',sans-serif;font-size:18px;line-height:1.35;cursor:pointer}
.iris-part-number{font-family:'IBM Plex Mono',monospace;font-size:12px;line-height:24px;color:var(--ink-soft)}
.iris-parts button:is(:hover,:focus-visible,[aria-pressed="true"]){color:var(--accent);background:var(--card)}
.iris-parts button[data-active="true"]{color:var(--accent);background:var(--card)}
.iris-parts button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.iris-parts button:is(:hover,:focus-visible,[aria-pressed="true"]) .iris-part-number{color:var(--accent)}
.iris-parts .iris-part-description{display:block;font-family:'Instrument Sans',sans-serif;font-size:14px;color:var(--ink-soft);line-height:1.55;margin-top:5px}
.iris-part-hint{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.04em;line-height:1.7;color:var(--ink-soft);margin-top:20px}
.iris-exploded-grid{position:relative}
.iris-exploded-plate{isolation:isolate}
.iris-exploded-plate .iris-highlight{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:0;pointer-events:none;transition:opacity .12s linear}
.iris-exploded-plate .iris-highlight.is-active{opacity:1}
.iris-exploded-plate .fig-tag{z-index:4;pointer-events:none}
.iris-leaders{position:absolute;inset:0;width:100%;height:100%;z-index:3;pointer-events:none;overflow:visible}
.iris-leaders g{color:#79717e}
.iris-leaders path{fill:none;stroke:currentColor;stroke-width:2}
.iris-leaders circle{fill:#f2f0ea;stroke:currentColor;stroke-width:2}
.iris-leaders text{fill:currentColor;font-family:'IBM Plex Mono',monospace;font-size:19px;font-weight:600;text-anchor:middle;dominant-baseline:central}
.iris-leaders g.is-active{color:#d95300}
.iris-leaders g.is-active path{stroke-width:4}
.iris-leaders g.is-active>path{marker-end:url(#iris-arrow-active)}
.iris-leaders g.is-active circle{fill:#d95300;stroke:#d95300}
.iris-leaders g.is-active text{fill:#fff}
.iris-connection{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:5;overflow:visible}
.iris-connection path{stroke:#e86b14;stroke-width:2;fill:none;vector-effect:non-scaling-stroke}
.iris-mobile-parts{display:none}
.iris-parts dt{font-family:'Archivo',sans-serif;font-size:18px;line-height:1.3}
.iris-parts dd{font-size:14px;color:var(--ink-soft);line-height:1.55;margin:5px 0 0}
.iris-cad-pair{max-width:1050px;margin:52px auto 0}
.iris-lineup{max-width:1000px;margin:auto}
.iris-lineup-plate{position:relative}
.iris-lever-leader{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.iris-lever-leader path{fill:none;stroke:#ffdf87;stroke-width:4}
.iris-lever-leader circle{fill:#f2f0ea;stroke:#b74700;stroke-width:4}
.iris-lever-label{position:absolute;left:7%;top:80%;padding:6px 9px;background:#f2f0ea;color:#6b340e;border:1px solid #b74700;font-family:'IBM Plex Mono',monospace;font-size:10px;line-height:1.4;letter-spacing:.04em;pointer-events:none}
.iris-fit-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,6vw,80px);max-width:1120px;margin:52px auto 0;align-items:center}
.iris-iteration-intro{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,6vw,80px);align-items:start;max-width:1120px;margin:0 auto 34px}
.iris-iteration-intro .case-lead{margin:0}
.iris-iteration-intro .copy{margin:0 0 16px}
.iris-design-decisions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;max-width:1120px;margin:0 auto}
.iris-design-decisions article{border-top:2px solid var(--accent);padding-top:18px;min-width:0}
.iris-design-decisions h3{font-family:'Archivo',sans-serif;font-size:23px;font-weight:500;line-height:1.25;margin:12px 0 16px}
.iris-design-decisions p{font-size:15px;line-height:1.65;color:var(--ink-soft);margin:0 0 14px}
.iris-design-decisions p b{color:var(--ink);font-weight:500}
.iris-process-note{max-width:1120px;margin:15px auto 32px;font-size:12px;line-height:1.65;color:var(--ink-soft)}
.iris-loop-heading{max-width:1120px;margin:46px auto 26px}
.iris-loop-heading h3{font-family:'Archivo',sans-serif;font-size:clamp(27px,3vw,36px);line-height:1.2;font-weight:500;margin:12px 0 18px}
.iris-loop-heading .copy{max-width:760px;margin:0}
.iris-iteration-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));list-style:none;padding:0;margin:0 auto 40px;max-width:1120px;border:1px solid var(--line);background:var(--card)}
.iris-iteration-steps li{min-width:0;padding:25px 24px;display:flex;flex-direction:column;border-right:1px solid var(--line)}
.iris-iteration-steps li:last-child{border-right:0}
.iris-step-label,.iris-step-detail{font-family:'IBM Plex Mono',monospace;font-size:10px;line-height:1.7;letter-spacing:.04em}
.iris-step-label{color:var(--accent)}
.iris-iteration-steps h3{font-family:'Archivo',sans-serif;font-size:22px;line-height:1.2;font-weight:500;margin:13px 0 12px}
.iris-iteration-steps p{font-size:15px;line-height:1.65;color:var(--ink-soft);margin:0 0 22px}
.iris-step-detail{display:block;margin-top:auto;color:var(--ink-soft);font-size:9px}
.iris-fit-plate{position:relative}
.iris-fit-leaders{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;color:#b74700}
.iris-fit-leaders path{fill:none;stroke:currentColor;stroke-width:2.5}
.iris-fit-target{fill:currentColor;stroke:#f2f0ea;stroke-width:2}
.iris-fit-badge{fill:#f2f0ea;stroke:currentColor;stroke-width:2.5}
.iris-fit-leaders text{fill:currentColor;font-family:'IBM Plex Mono',monospace;font-size:24px;font-weight:600;text-anchor:middle;dominant-baseline:central}
.iris-fit-key{margin:24px 0}
.iris-fit-key>div{padding:15px 0;border-top:1px solid var(--line)}
.iris-fit-key dt{display:flex;align-items:center;gap:10px;font-size:18px;line-height:1.3}
.iris-fit-key dt span{display:grid;place-items:center;flex-shrink:0;width:26px;height:26px;border:1px solid var(--accent);border-radius:50%;font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--accent)}
.iris-fit-key dd{margin:8px 0 0 36px;color:var(--ink-soft);font-size:14px;line-height:1.6}
.iris-iteration-takeaway{margin-top:26px;padding:19px 20px;border-left:2px solid var(--accent);background:var(--card)}
.iris-iteration-takeaway p{font-size:15px;line-height:1.65;color:var(--ink-soft)}
.iris-outcome{grid-template-columns:minmax(260px,.8fr) minmax(0,1.2fr)}
.iris-outcome>figure{max-width:380px;justify-self:center}
@media(max-width:900px){.iris-exploded-grid{grid-template-columns:minmax(0,1.1fr) minmax(250px,.9fr);gap:26px}.iris-demo-grid{gap:32px}}
@media(max-width:720px){
 .iris-connection{display:none}
 .iris-mobile-parts{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:5px;margin-top:13px}
 .iris-mobile-parts button{min-height:50px;padding:7px 2px;border:1px solid var(--line);background:var(--card);color:var(--ink);font-family:'IBM Plex Mono',monospace;font-size:10px;line-height:1.5;cursor:pointer}
 .iris-mobile-parts b{display:block;font-size:12px;font-weight:500}
 .iris-mobile-parts button[aria-pressed="true"]{background:var(--accent);color:var(--paper);border-color:var(--accent)}
 .iris-mobile-parts button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
 .iris-opening,.iris-demo-grid,.iris-exploded-grid,.iris-fit-grid,.iris-outcome{grid-template-columns:minmax(0,1fr);gap:34px}
 .iris-opening .opening-visual{width:100%;max-width:420px}
 .iris-role{font-size:9px}
 .iris-demo-figure{max-width:330px}
 .iris-exploded-grid .case-lead p{font-size:30px}
 .iris-chapters b{font-size:16px}
 .iris-parts{margin-top:22px}
 .iris-cad-pair{margin-top:34px}
 .iris-fit-grid{margin-top:34px}
 .iris-iteration-intro{grid-template-columns:1fr;gap:18px;margin-bottom:24px}
 .iris-design-decisions{grid-template-columns:1fr;gap:20px}
 .iris-design-decisions h3{font-size:23px}
 .iris-process-note{margin:16px auto 26px}
 .iris-loop-heading{margin-top:32px}
 .iris-iteration-steps{grid-template-columns:1fr;margin-bottom:30px}
 .iris-iteration-steps li{padding:22px;border-right:0;border-bottom:1px solid var(--line)}
 .iris-iteration-steps li:last-child{border-bottom:0}
 .iris-iteration-steps h3{font-size:22px;margin-top:9px}
 .iris-iteration-steps p{margin-bottom:14px}
 .iris-outcome>figure{width:100%;max-width:360px}
}
@media(prefers-reduced-motion:reduce){.iris-exploded-plate .iris-highlight{transition:none}}