.iv-enhanced-only{display:none}.iv-ready .iv-enhanced-only{display:flex}.iv-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.iv-intro{margin-bottom:28px;max-width:760px;font-size:16px}.iv-family-tabs{gap:0;border-bottom:1px solid #a6b9b3;display:none;flex-wrap:nowrap}.iv-family-tabs button{flex:1;min-width:0;text-align:left;display:flex;align-items:center;gap:14px;padding:20px 18px;min-height:86px;background:transparent;border:1px solid transparent;font-size:16px;line-height:1.4}.iv-family-tabs button>span{font:11px monospace;color:#56646a;align-self:flex-start;margin-top:5px}.iv-family-tabs button[aria-selected=true]{background:#e5ede8;border-color:#a6b9b3;border-bottom:3px solid var(--green);font-weight:600}.iv-family-tabs button:hover{background:#eaf0eb}.iv-family-tabs button:focus-visible{outline-offset:-5px}
.iv-view-controls{justify-content:flex-end;gap:5px;margin-top:24px}.iv-view-controls button{padding:10px 17px;min-height:44px;background:transparent;color:var(--ink);border:1px solid var(--line);font-size:13px;border-radius:2px}.iv-view-controls button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.iv-view-controls button:hover{border-color:var(--ink)}
.iv-family-panel{display:grid;grid-template-columns:1.2fr 1fr;gap:64px;align-items:center;padding-top:35px;border-top:1px solid var(--line);margin-top:35px}.iv-ready .iv-family-panel{border-top:0;margin-top:0;padding-top:18px}.iv-family-visual{min-width:0;display:grid;align-items:center;min-height:550px}.iv-family-visual figure{min-width:0;grid-area:1/1}.iv-family-visual figure>img{width:100%;height:auto;aspect-ratio:1.25;max-height:445px;object-fit:contain;background:#e8eae5}.iv-family-visual [data-image=capillaries]{max-width:480px;margin:auto;background:transparent}.iv-family-visual figcaption,.iv-coil-figure figcaption{font:11px/1.5 monospace;color:var(--muted);padding-top:14px}.iv-family-panel:focus-visible{outline:3px solid var(--blue);outline-offset:8px}.iv-family-copy .eyebrow{margin-bottom:15px;color:var(--blue)}.iv-family-copy h3{font-size:36px;line-height:1.15;max-width:480px}.iv-family-copy>p:not(.eyebrow){font-size:16px;margin-top:22px;max-width:450px}.iv-family-copy h4{font-size:13px;letter-spacing:.03em;text-transform:uppercase;margin:28px 0 10px}.iv-family-copy ul{list-style:none;padding:0;margin:0 0 25px}.iv-family-copy li{font-size:15px;padding:8px 0;border-bottom:1px solid var(--line);color:var(--muted)}.iv-actions{display:flex;gap:16px 25px;flex-wrap:wrap;align-items:center}.iv-actions .btn{font-size:13px;min-height:48px}.iv-actions .text-link{font-size:13px}
.iv-construction,.iv-coil-drawing,.iv-stage-sketch{width:100%;height:auto;display:block}.iv-construction{background:#edf2ed}.iv-part-key{display:flex;gap:24px;flex-wrap:wrap;margin-top:14px;font-size:13px}.iv-part-key span{display:flex;gap:10px;align-items:center}.iv-part-key b{font:11px monospace;color:var(--blue)}.iv-diagram-note{font-size:12px;margin-top:12px!important;max-width:530px}.iv-small{font-size:13px;line-height:1.6}.iv-drawing-label{display:flex;justify-content:space-between;gap:20px;font:10px/1.6 monospace;text-transform:uppercase;letter-spacing:.05em;color:#56646a}.iv-drawing-label>span:last-child{text-align:right}
.iv-coil-section{background:#edf2ed;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.iv-coil-layout{display:grid;grid-template-columns:1.25fr 1fr;gap:70px;align-items:center}.iv-coil-figure{min-width:0}.iv-coil-drawing{margin-top:16px}.iv-coil-controls{min-width:0}.iv-field{margin-bottom:30px}.iv-field>label,.iv-control-title label{font-size:14px;font-weight:600;display:block}.iv-field select{margin-top:12px;width:100%;background:#fafcf8;border:1px solid #8c9b9f;padding:12px;min-height:48px;border-radius:2px}.iv-control-title{display:flex;gap:15px;justify-content:space-between;align-items:center}.iv-control-title output{color:#036ab1;white-space:nowrap;font-size:16px;font-weight:600;font-variant-numeric:tabular-nums}.iv-field input[type=range]{width:100%;height:44px;margin:12px 0 0;accent-color:#036ab1;cursor:pointer}.iv-range-ends{display:flex;justify-content:space-between;font:11px monospace;color:var(--muted)}.iv-construction-copy{min-height:115px;border-top:1px solid #bccbc3;padding-top:22px;margin-bottom:22px}.iv-construction-copy h3{font-size:27px}.iv-construction-copy p{font-size:15px;margin-top:14px}.iv-coil-controls>.text-link{margin-top:20px}
.iv-stage-intro{font-size:14px;margin-top:15px!important}.iv-process-layout{display:grid;grid-template-columns:1fr 1.1fr;gap:90px;align-items:start}.iv-process-figure{padding:25px 28px;background:#edf2ed;min-width:0}.iv-process-figure figcaption strong{display:block;font-size:22px;letter-spacing:-.025em;line-height:1.3}.iv-process-figure figcaption>span{display:block;font-size:13px;color:var(--muted);margin-top:10px}.iv-stage-list{grid-template-columns:1fr;gap:0;min-width:0}.iv-stage-list .process-step{padding:20px 0;border-top:1px solid #a7b9b0;margin:0}.iv-stage-list .process-step summary{display:flex;align-items:center;gap:22px;padding-right:38px;min-height:44px}.iv-stage-list .step-number{margin-bottom:0}.iv-stage-list .process-step h3{font-size:26px}.iv-stage-list .disclosure-icon{bottom:auto;top:7px}.iv-stage-list .process-step p{padding-top:12px;padding-left:38px}.iv-stage-tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 0 38px}.iv-stage-tags span{font-size:11px;padding:4px 9px;border:1px solid #bdcec5;border-radius:2px;color:var(--muted)}.iv-stage-list>.text-link{justify-self:start;margin-top:16px}.iv-stage-list .process-step[open]{border-top:2px solid var(--green)}
.iv-changed{animation:iv-change .18s ease-out}@keyframes iv-change{from{opacity:.75;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1000px){.iv-family-tabs button{font-size:14px;padding:15px 10px;gap:8px}.iv-family-panel{gap:30px}.iv-family-visual{min-height:440px}.iv-family-copy h3{font-size:30px}.iv-coil-layout{gap:35px}.iv-process-layout{gap:35px}.iv-process-figure{padding:22px 18px}.iv-stage-list .process-step h3{font-size:23px}}
@media(max-width:700px){.section-nav-explorer .wrap{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.section-nav-explorer a{padding:12px 0;min-height:44px}.iv-ready .iv-family-tabs{display:grid;grid-template-columns:1fr 1fr}.iv-family-tabs button{min-height:76px;font-size:13px;padding:14px 10px}.iv-family-tabs button>span{font-size:10px;margin-top:3px}.iv-view-controls{justify-content:flex-start;margin-top:20px}.iv-view-controls button{font-size:12px;padding:10px 13px}.iv-family-panel{grid-template-columns:1fr;gap:20px}.iv-family-visual{min-height:350px}.iv-family-visual figure>img{aspect-ratio:1.25;max-height:350px}.iv-family-copy h3{font-size:32px}.iv-family-copy h4{margin-top:23px}.iv-family-copy>p:not(.eyebrow){margin-top:18px;font-size:15px}.iv-part-key{gap:10px 18px;font-size:12px}.iv-diagram-note{font-size:12px}.iv-family-visual figcaption{font-size:10px}.iv-coil-layout{grid-template-columns:1fr;gap:30px}.iv-coil-figure figcaption{font-size:10px}.iv-drawing-label{font-size:9px;gap:12px}.iv-coil-controls .iv-field{margin-bottom:24px}.iv-process-layout{grid-template-columns:1fr;gap:30px}.iv-process-figure{padding:18px;display:grid;grid-template-columns:minmax(90px,1fr) 1.4fr;gap:12px;align-items:center}.iv-process-figure>.iv-drawing-label{grid-column:1/-1}.iv-stage-sketch{max-height:140px}.iv-process-figure figcaption strong{font-size:19px}.iv-process-figure figcaption>span{font-size:12px;line-height:1.6}.iv-stage-list .process-step h3{font-size:25px}.iv-stage-list .process-step summary{gap:16px}.iv-stage-list .process-step p{padding-left:0}.iv-stage-tags{margin-left:0}.iv-stage-list>.text-link{font-size:13px}.iv-construction-copy{min-height:125px}}
@media(prefers-reduced-motion:reduce){.iv-changed{animation:none}.iv-explorer *,.iv-coil-section *,.iv-process *{scroll-behavior:auto;transition:none!important}}

/* The plus rotates into a close symbol; both native details states remain usable. */
.iv-stage-list .disclosure-icon{display:grid;place-items:center;width:28px;height:28px;top:8px;line-height:1;transform-origin:center;transition:transform .22s ease}
.iv-process-figure figcaption{min-height:95px}
/* One short greeting: a shoulder lift, a softer wrist wave, a nod and a blink. */
.iv-engineer{--iv-greeting-duration:3.2s}
.iv-engineer-wave,.iv-engineer-hand,.iv-engineer-head{transform-box:view-box}
.iv-engineer-wave{transform-origin:304px 195px}
.iv-engineer-hand{transform-origin:354px 193px}
.iv-engineer-head{transform-origin:264px 175px}
.iv-engineer-eyes{transform-box:fill-box;transform-origin:center}
.iv-engineer:not([hidden]) .iv-engineer-wave{animation:iv-wave var(--iv-greeting-duration) ease-in-out both}
.iv-engineer:not([hidden]) .iv-engineer-hand{animation:iv-hand-wave var(--iv-greeting-duration) ease-in-out both}
.iv-engineer:not([hidden]) .iv-engineer-head{animation:iv-head-nod var(--iv-greeting-duration) ease-in-out both}
.iv-engineer:not([hidden]) .iv-engineer-eyes{animation:iv-blink var(--iv-greeting-duration) linear both}
.iv-engineer:not([hidden]) .iv-engineer-greeting path{stroke-dasharray:1;animation:iv-greeting-accent 1.7s ease-out both}
.iv-engineer:not([hidden]) .iv-engineer-greeting path:nth-child(2){animation-delay:.12s}
.iv-engineer:not([hidden]) .iv-engineer-greeting path:nth-child(3){animation-delay:.24s}
@keyframes iv-wave{0%,100%{transform:rotate(0)}18%,66%{transform:rotate(-4deg)}82%{transform:rotate(1deg)}}
@keyframes iv-hand-wave{0%,14%,100%{transform:rotate(0)}24%{transform:rotate(-13deg)}34%{transform:rotate(11deg)}44%{transform:rotate(-11deg)}54%{transform:rotate(9deg)}64%{transform:rotate(-5deg)}78%{transform:rotate(0)}}
@keyframes iv-head-nod{0%,100%{transform:rotate(0) translateY(0)}20%{transform:rotate(-3deg) translateY(-1px)}42%{transform:rotate(1deg) translateY(1px)}66%{transform:rotate(-1deg) translateY(0)}86%{transform:rotate(0) translateY(0)}}
@keyframes iv-blink{0%,34%,40%,100%{transform:scaleY(1)}36%,38%{transform:scaleY(.08)}}
@keyframes iv-greeting-accent{0%,8%{stroke-dashoffset:1;opacity:0}28%,58%{stroke-dashoffset:0;opacity:1}100%{stroke-dashoffset:0;opacity:.3}}
@media(max-width:700px){.iv-process-figure figcaption{min-height:110px}}
@media(prefers-reduced-motion:reduce){.iv-engineer *{animation:none!important}.iv-stage-list .disclosure-icon{transition:none}}