:root{--paper:#fcfbf8;--ink:#413c35;--bronze:#816035;--muted:#756a5c;--rule:#ddd6ca;--teal:#007f80;--orange:#b86839;font-family:Heebo,Arial,sans-serif;color:var(--ink);background:var(--paper);color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}button,select{font:inherit;color:inherit}a{color:var(--bronze);text-underline-offset:5px}button{cursor:pointer}button,a,select,summary{-webkit-tap-highlight-color:transparent}button{border:0;background:none;padding:0;text-align:inherit}h1,h2,h3,p,figure,dl,dd{margin:0}h1,h2,h3{font-weight:400}p{font-size:17px;line-height:1.9}img{display:block;max-width:100%;height:auto}a:focus-visible,button:focus-visible,select:focus-visible,summary:focus-visible,.viewer-stage:focus-visible{outline:2px solid var(--teal);outline-offset:5px}[hidden]{display:none!important}.shell{max-width:1440px;padding:0 48px;margin:auto}.site-header{padding-top:28px;direction:ltr}.brand{display:block;width:max-content;max-width:100%;text-align:center;text-decoration:none;margin-bottom:18px}.name{display:block;font:400 32px/1.2 Manrope,Arial,sans-serif;letter-spacing:.075em;padding:0 0 6px .075em;border-bottom:1px solid var(--rule)}.descriptor{display:block;font:11px/1.5 Manrope,Arial,sans-serif;letter-spacing:.025em;padding-top:5px}.main-nav{display:flex;gap:30px;direction:rtl;border-block:1px solid var(--rule)}.main-nav a{display:flex;align-items:center;min-height:48px;text-decoration:none;font-size:14px}.main-nav a[aria-current]{text-decoration:underline}.back{display:inline-flex;align-items:center;min-height:44px;font-size:13px;text-decoration:none;color:var(--muted);margin-top:14px}.hero{display:grid;grid-template-columns:1fr 1.05fr;gap:8%;align-items:center;margin:10px 0 56px}.hero-copy{padding-block:26px}.eyebrow,.small-label{display:block;font-size:13px;color:var(--bronze);line-height:1.7}.hero h1{font-size:clamp(62px,7vw,98px);line-height:1.1;letter-spacing:-.045em;color:var(--bronze);margin:24px 0 25px}.hero-line{font-size:clamp(25px,2.6vw,35px);line-height:1.5;color:var(--ink)}.hero-intro{font-size:16px;line-height:1.95;max-width:440px;margin:24px 0 25px}.hero-image{overflow:visible}.hero-image img{width:100%;height:auto}.meta{border-top:1px solid var(--rule);padding-top:17px;font-size:12px;line-height:1.7;display:grid;gap:8px;margin-bottom:21px}.meta div{display:grid;grid-template-columns:52px 1fr;gap:12px}.meta dt{color:var(--muted)}.text-link{display:inline-flex;align-items:center;min-height:44px;font-size:13px;color:var(--bronze);text-decoration:underline;text-underline-offset:5px}.image-button{display:block;width:100%;cursor:zoom-in}.image-button img{width:100%}.chapters{display:flex;flex-wrap:wrap;gap:10px 37px;border-block:1px solid var(--rule);padding-block:8px}.chapters a{min-height:44px;display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-size:14px}.chapters a[aria-current]{text-decoration:underline}.chapters span{font:11px Manrope,Arial,sans-serif;color:var(--muted)}.chapter{padding-top:94px;scroll-margin-top:24px}.section-heading{display:grid;grid-template-columns:1fr 1.13fr;gap:70px;align-items:end;margin-bottom:38px}.number{display:block;color:var(--bronze);font-size:12px;margin-bottom:15px}.section-heading h2,.final-prototype h2{font-size:clamp(32px,3.6vw,46px);line-height:1.35;letter-spacing:-.025em;color:var(--bronze)}.section-heading p{color:var(--muted);max-width:650px}.context-grid{display:grid;grid-template-columns:1fr 1fr .8fr;gap:28px}.crop{position:relative;overflow:hidden;background:#eee}.crop img{position:absolute;max-width:none}.crop-bassinet{aspect-ratio:1.08}.crop-bassinet img{width:102.041%;left:-1.0204%;top:-16.88%}.crop-lines{aspect-ratio:1.08}.crop-lines img{width:227.273%;left:-125%;top:-49.0566%}figcaption{padding-top:14px;font-size:13px;line-height:1.8;color:var(--muted)}figcaption strong{display:block;font-weight:500;font-size:17px;margin-bottom:4px;color:var(--ink)}.context-decision{padding:23px 30px;border-inline-start:1px solid var(--rule)}.context-decision p{font-size:28px;line-height:1.55;margin:18px 0 24px;color:var(--bronze)}.quiet{font-size:13px;line-height:1.85;color:var(--muted)}.research-images{display:grid;grid-template-columns:1fr 1fr;gap:30px}.research-images .image-button{background:white}.research-images img{height:360px;object-fit:contain}.test-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:27px;margin-top:40px}.test-list article{border-top:1px solid var(--rule);padding-top:17px}.test-list article>span{font:12px Manrope,Arial,sans-serif;color:var(--orange)}h3{font-size:20px;line-height:1.5;color:var(--bronze);margin:9px 0}.test-list p{font-size:14px}.challenge{margin-top:40px;padding:27px 33px;background:#eef4f1;font-size:21px;color:var(--teal);line-height:1.65}.mechanism-facts{display:grid;grid-template-columns:repeat(3,1fr);margin-bottom:30px;border-block:1px solid var(--rule)}.mechanism-facts p{display:flex;align-items:center;gap:20px;padding:20px 25px;border-inline-start:1px solid var(--rule)}.mechanism-facts p:first-child{border:0}.mechanism-facts b{font:400 44px/1.2 Manrope,Arial,sans-serif;color:var(--teal)}.mechanism-facts span{font-size:14px}.drawing-area{background:white;padding:25px 30px 30px}.figure-controls{display:flex;align-items:center;justify-content:space-between;gap:22px}.segmented{display:flex;padding:3px;border:1px solid var(--rule);background:var(--paper)}.segmented button{min-height:45px;padding:8px 20px;font-size:14px;white-space:nowrap}.segmented [aria-pressed=true]{background:var(--bronze);color:white}.segmented [aria-pressed=false]:hover{background:#eee9df}.exploded-frame{position:relative;margin-top:24px}.exploded-frame>img{width:100%;height:auto}.exploded-frame>svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.pin{position:absolute;transform:translate(-50%,-50%);width:32px;height:32px;border-radius:50%;background:white;border:1px solid var(--orange);color:var(--orange);font:12px Manrope,Arial,sans-serif;display:grid;place-items:center}.pin[aria-pressed=true]{background:var(--orange);color:white}.drawing-caption{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:12px;color:var(--muted);margin-top:8px}.instruction{font-size:13px;color:var(--muted);margin:15px 0 14px}.part-list{display:grid;direction:ltr;grid-template-columns:repeat(8,minmax(0,1fr));gap:7px}.part-button{padding:11px 4px 9px;border-block:1px solid var(--rule);font-size:11px;text-align:center;direction:rtl;min-height:70px;line-height:1.5}.part-button span{display:block;font:12px Manrope,Arial,sans-serif;color:var(--orange);margin-bottom:8px}.part-button[aria-pressed=true]{background:#f4efe7;border-bottom:2px solid var(--bronze);color:var(--bronze)}.part-description{display:flex;align-items:start;gap:22px;margin-top:24px;padding-top:4px;min-height:110px}.part-index{font:30px/1.4 Manrope,Arial,sans-serif;color:var(--orange);padding-top:6px}.part-description h3{font-size:19px;margin:0 0 6px}.part-description p{font-size:15px}.section-image{margin-top:35px}.three-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;border-top:1px solid var(--rule);padding-top:15px;margin-top:20px}.three-notes p{font-size:14px}.three-notes h3{font-size:18px}.teeth-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;margin-top:25px;align-items:center}.teeth-grid img{height:350px;object-fit:contain}.panel-copy{font-size:16px;margin-top:28px;padding-top:24px;border-top:1px solid var(--rule)}.use-study{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;align-items:center;background:white;padding:30px 40px}.use-study figure img{height:420px;object-fit:contain}.use-options{display:grid;margin-top:18px}.use-options button{display:flex;align-items:center;gap:18px;min-height:66px;border-bottom:1px solid var(--rule);padding:10px 12px;font-size:18px}.use-options button strong{font-weight:400}.use-options button span{font:12px Manrope,Arial,sans-serif;color:var(--muted)}.use-options [aria-pressed=true]{background:#eef4f1;border-inline-start:3px solid var(--teal);color:var(--teal)}#use-caption{font-size:14px;min-height:65px;margin-top:21px}.prototype-pair{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:35px}.prototype-pair img{aspect-ratio:1.16;object-fit:contain;background:white}.material-split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;margin-top:74px}.material-split figure{max-width:480px}.material-split img{max-height:600px;object-fit:contain}.material-copy article{padding:26px 0;border-bottom:1px solid var(--rule)}.material-copy article:last-child{border:0;padding-bottom:0}.material-copy h3{font-size:28px;line-height:1.4;margin:0 0 15px}.material-copy p{font-size:16px}.material-copy .quiet{font-size:12px;margin-top:12px}.removal{margin:24px 0 0;padding:0;list-style:none;counter-reset:steps;display:flex;gap:18px}.removal li{counter-increment:steps;font-size:12px;line-height:1.7;flex:1}.removal li:before{content:'0' counter(steps);display:block;font:12px Manrope,Arial,sans-serif;color:var(--orange);margin-bottom:7px}.more{border-block:1px solid var(--rule);margin-top:45px}.more summary{cursor:pointer;min-height:64px;display:flex;align-items:center;justify-content:space-between;font-size:15px;color:var(--bronze);list-style:none}.more summary::-webkit-details-marker{display:none}.more summary span{font:26px Arial}.more[open] summary span{transform:rotate(45deg)}.system-views{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;background:white;padding:20px;margin-bottom:26px}.system-views img{height:240px;object-fit:contain}.forms{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;background:white;padding:30px 35px}.forms img{height:440px;object-fit:contain}.forms figcaption{padding-top:22px;text-align:center;border-top:1px solid var(--rule)}.forms figcaption strong{font-size:20px}.forms figcaption span{font-size:13px}.final-prototype{display:grid;grid-template-columns:1fr 1fr;gap:95px;align-items:center;margin-top:74px}.final-prototype h2{margin:16px 0 27px}.final-prototype p{font-size:16px;margin-top:20px;max-width:440px}.final-prototype img{max-height:620px;object-fit:contain}.project-end{display:flex;justify-content:space-between;align-items:center;gap:50px;border-top:1px solid var(--rule);margin-top:75px;padding:48px 0 40px}.project-end h2{font-size:30px;line-height:1.45;color:var(--bronze);margin-bottom:22px}.project-end p{font-size:13px}.project-end .credit{font-size:12px;color:var(--muted);margin-top:10px}.download{display:grid;grid-template-columns:1fr 30px;gap:3px 25px;text-decoration:none;padding:22px 0;border-block:1px solid var(--rule);min-width:250px}.download span{font-size:20px}.download small{grid-column:1;font-size:12px;color:var(--muted)}.download b{grid-column:2;grid-row:1/3;align-self:center;font-size:30px;font-weight:400}.return{display:flex;justify-content:space-between;gap:20px;margin:10px 0 35px}.return a{min-height:44px;display:flex;align-items:center;font-size:14px}footer{display:flex;justify-content:space-between;border-top:1px solid var(--rule);padding:25px 0 32px;font-size:12px;color:var(--bronze)}footer span{font-family:Manrope,Arial,sans-serif;letter-spacing:.12em}.skip{position:fixed;top:-100px;right:20px;padding:12px;background:white;z-index:50}.skip:focus{top:12px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}dialog{max-width:none;max-height:none;width:96vw;height:94dvh;padding:0;border:1px solid var(--rule);background:var(--paper);color:var(--ink);overflow:hidden}dialog::backdrop{background:rgb(25 23 20 / .8)}.viewer-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;height:82px;padding:14px 24px;border-bottom:1px solid var(--rule)}.viewer-toolbar h2{font-size:18px}.viewer-toolbar>div{display:flex;gap:22px;align-items:center;font-size:12px}.viewer-toolbar select{background:white;border:1px solid var(--rule);padding:9px;min-height:42px}.viewer-toolbar a,.viewer-toolbar button{display:flex;align-items:center;min-height:44px}.viewer-stage{height:calc(100% - 82px);overflow:auto;direction:ltr;background:white;padding:20px}.viewer-stage img{max-width:none;margin:auto}.viewer-stage.fit{display:flex;align-items:center;justify-content:center}.viewer-stage.fit img{max-width:100%;max-height:100%;width:auto;height:auto}body.modal-open{overflow:hidden}.noscript{padding:25px;text-align:center}.hero>*,.section-heading>*,.material-split>*,.use-study>*,.final-prototype>*{min-width:0}
@media(min-width:1600px){.shell{padding-inline:56px}}
@media(max-width:1000px){.shell{padding-inline:30px}.hero{gap:6%}.hero h1{font-size:68px}.hero-line{font-size:27px}.hero-intro{font-size:15px}.context-grid{grid-template-columns:1fr 1fr}.context-decision{grid-column:1/-1;padding:20px 0;display:grid;grid-template-columns:1fr 2fr 1fr;gap:20px;border-inline:0;border-top:1px solid var(--rule);align-items:center}.context-decision p{margin:0;font-size:24px}.context-decision br{display:none}.section-heading,.material-split,.final-prototype{gap:40px}.use-study{gap:25px;padding:25px}.figure-controls{flex-wrap:wrap;gap:8px}.research-images img{height:290px}.part-list{grid-template-columns:repeat(4,1fr)}.forms{gap:25px}.forms img{height:350px}}
@media(max-width:640px){.shell{padding-inline:20px}.site-header{padding-top:20px}.brand{margin-inline:auto}.name{font-size:29px}.descriptor{font-size:10px}.main-nav{gap:27px}.main-nav a{font-size:13px}.back{margin-top:10px}.hero{grid-template-columns:1fr;gap:25px;margin:0 0 32px}.hero-copy{padding:13px 0 0}.eyebrow{font-size:12px}.hero h1{font-size:57px;line-height:1.1;margin:18px 0}.hero h1 br{display:none}.hero-line{font-size:26px}.hero-intro{margin:19px 0}.hero-image{max-height:none}.hero-image img{max-height:620px;object-fit:contain}.meta{margin-bottom:6px}.chapters{gap:0 22px;padding-block:6px}.chapters a{font-size:12px;gap:6px}.chapter{padding-top:58px;scroll-margin-top:18px}.section-heading{grid-template-columns:1fr;gap:20px;margin-bottom:26px}.section-heading h2,.final-prototype h2{font-size:32px}.section-heading p{font-size:16px}.number{font-size:11px;margin-bottom:12px}.context-grid{gap:21px 17px}.context-grid figcaption{font-size:12px}.context-grid figcaption strong{font-size:15px}.context-decision{grid-template-columns:1fr;gap:14px;padding-top:24px}.context-decision p{font-size:24px}.context-decision .quiet{font-size:13px}.research-images{grid-template-columns:1fr;gap:27px}.research-images img{height:auto;max-height:360px}.test-list{grid-template-columns:repeat(2,1fr);gap:25px 20px;margin-top:30px}.test-list h3{font-size:18px}.test-list p{font-size:13px}.challenge{padding:22px;margin-top:29px;font-size:19px}.mechanism-facts p{padding:16px 6px;display:block;text-align:center}.mechanism-facts b{display:block;font-size:34px;margin-bottom:4px}.mechanism-facts span{font-size:11px}.drawing-area{padding:16px 12px 20px}.figure-controls{gap:9px}.segmented{width:100%}.segmented button{flex:1;padding:8px 5px;font-size:12px;min-height:43px}.figure-controls .quiet{font-size:11px}.exploded-frame{margin-top:30px;margin-bottom:20px}.pin{width:22px;height:22px;font-size:9px}.part-list{gap:5px}.part-button{font-size:10px;padding:10px 2px;min-height:65px}.part-button span{font-size:11px;margin-bottom:5px}.part-description{gap:15px;min-height:124px;margin-top:19px}.part-description h3{font-size:18px}.part-description p{font-size:14px}.instruction{font-size:12px}.drawing-caption{font-size:11px;gap:8px}.drawing-caption .text-link{font-size:11px}.section-image{margin-top:25px}.three-notes{grid-template-columns:1fr;gap:9px;margin-top:16px}.teeth-grid{grid-template-columns:1fr;gap:22px}.teeth-grid img{height:240px}.panel-copy{font-size:14px}.use-study{grid-template-columns:1fr;gap:17px;padding:20px 16px}.use-options{display:flex;gap:4px;margin-top:14px}.use-options button{flex:1;display:flex;flex-direction:column;gap:8px;padding:10px 5px;font-size:13px;text-align:center;min-height:78px}.use-options [aria-pressed=true]{border-inline:0;border-bottom:3px solid var(--teal)}.use-options button span{font-size:10px}#use-caption{font-size:13px;min-height:48px;margin-top:16px}.use-study figure img{height:280px}.prototype-pair{gap:17px;margin-top:23px}.prototype-pair figcaption{font-size:12px}.material-split{grid-template-columns:1fr;gap:25px;margin-top:45px}.material-split figure{max-width:none}.material-split img{max-height:460px}.material-copy h3{font-size:25px}.material-copy p{font-size:15px}.material-copy article{padding:23px 0}.removal{gap:16px}.more{margin-top:30px}.more summary{font-size:13px}.system-views{grid-template-columns:1fr;padding:15px}.system-views img{height:250px}.forms{gap:9px;padding:17px 9px}.forms img{height:220px}.forms figcaption{padding-top:15px}.forms figcaption strong{font-size:14px;line-height:1.5}.forms figcaption span{font-size:11px}.final-prototype{grid-template-columns:1fr;gap:28px;margin-top:45px}.final-prototype h2{margin:13px 0 22px}.final-prototype p{font-size:15px}.final-prototype img{max-height:510px}.project-end{display:block;margin-top:50px;padding:34px 0}.project-end h2{font-size:27px}.download{margin-top:27px;min-width:0;width:100%}.project-end p{font-size:12px}.return{margin:0 0 20px}.return a{font-size:12px}dialog{width:100vw;height:100dvh;border:0}.viewer-toolbar{height:124px;display:block;padding:13px 15px}.viewer-toolbar h2{font-size:16px;margin-bottom:10px}.viewer-toolbar>div{gap:10px;justify-content:space-between;font-size:11px}.viewer-toolbar select{max-width:130px;font-size:11px}.viewer-stage{height:calc(100% - 124px);padding:12px}}
@media(max-width:360px){.shell{padding-inline:16px}.hero h1{font-size:50px}.forms img{height:180px}.forms figcaption strong{font-size:13px}.segmented button{font-size:11px}.context-grid{grid-template-columns:1fr}.context-decision{grid-column:auto}.part-button{font-size:9px}.use-options button{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header,.back,.chapters,.figure-controls,.text-link,.more,.download,.return,footer,dialog{display:none}.shell{padding:0}.chapter{break-before:page}.hero{margin:0}.pin{display:none}.image-button{cursor:auto}}

.skip:not(:focus){width:1px;height:1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
@media(max-width:640px){.hero{gap:18px}.hero-copy{display:contents}.hero .eyebrow{order:0;margin-top:13px}.hero h1{order:1;margin:0}.hero-image{order:2;margin-block:4px 9px}.hero-line{order:3}.hero-intro{order:4;margin:0}.hero .meta{order:5;margin:2px 0 0}.hero-copy>.text-link{order:6}}