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input{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip-path:inset(50%);opacity:0;pointer-events:none;white-space:nowrap}.topic-check span{width:22px;height:22px;border:1px solid rgba(16,33,41,.28);border-radius:50%;background:#fff center / 0 0 no-repeat}.topic-check input:checked+span{border-color:transparent;background-color:transparent;background-image:var(--topic-check-checked-icon);background-size:22px 22px}.topic-check input:focus-visible+span{outline:2px solid rgba(15,139,141,.4);outline-offset:2px}.tool-topic-button{display:grid;grid-template-columns:36px minmax(0,1fr);align-items:center;gap:7px;width:100%;min-height:56px;padding:4px 6px 4px 0;border:0;border-radius:7px;background:transparent;color:var(--text);text-align:left}.tool-topic-button img{width:36px;height:30px;object-fit:contain}.topic-copy{display:flex;align-items:center;min-width:0}.topic-title{display:-webkit-box;overflow:hidden;font-size:.82rem;font-weight:850;line-height:1.35;-webkit-box-orient:vertical;-webkit-line-clamp:3;line-clamp:3}@media(min-width:781px){.topic-title{text-wrap:pretty}.tool-topic-row:hover .topic-title,.tool-topic-row:focus-within .topic-title{display:block;overflow:visible;-webkit-line-clamp:unset;line-clamp:unset}}.tool-topic-row:hover,.tool-topic-row:focus-within,.tool-topic-row.is-active,.tool-topic-row.is-selected{border-color:#0f8b8d47;background:var(--surface-soft);color:var(--teal-deep)}.tool-topic-button:focus-visible{outline:none}.tool-stage{position:relative;display:grid;grid-template-rows:auto minmax(0,1fr);height:100%;min-height:0;padding:clamp(10px,1.4vw,18px);overflow:hidden}.stage-title-row{position:relative;z-index:2;display:grid;gap:12px;min-height:48px}.stage-heading-line{display:flex;align-items:center;gap:10px;max-width:100%;min-width:0;padding-right:min(440px,36vw)}.stage-title-row h1{min-width:0;margin:0;font-size:3.35rem;line-height:1.02;letter-spacing:0;text-box:trim-both cap alphabetic}.summary-toggle{flex:0 0 36px;display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;min-height:36px;padding:0;border:0;border-radius:50%;background:transparent;color:var(--teal-deep)}.summary-toggle svg{display:block;width:24px;height:24px}.summary-toggle[aria-expanded=true]{color:var(--teal)}.summary-toggle[aria-expanded=false]{color:#61737bd6}.summary-toggle:hover{color:var(--teal)}.summary-toggle:focus-visible{outline:2px solid rgba(15,139,141,.34);outline-offset:2px}.stage-summary{display:grid;gap:6px;max-width:100%}.procedure-copy p,.compare-card figcaption span{display:-webkit-box;margin:0;overflow:hidden;color:var(--muted);font-weight:760;line-height:1.55;-webkit-box-orient:vertical}.stage-summary p{margin:0;max-width:none;overflow:visible;color:var(--muted);font-size:clamp(.9rem,1vw,1rem);font-weight:760;line-height:1.55}.annotated-panel{position:relative;display:flex;align-items:center;justify-content:center;min-width:0;min-height:0;margin:0}.annotated-panel img{object-fit:contain}.annotated-panel canvas{position:absolute;z-index:4;pointer-events:none;touch-action:none}.education-tool.is-drawing-open .annotated-panel canvas{pointer-events:auto}.anatomy-panel{align-self:stretch;height:100%;min-height:0;padding:clamp(4px,1vw,16px)}.anatomy-panel img{width:100%;height:100%;max-height:none}.anatomy-compare-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(360px,100%),1fr));align-content:start;gap:12px;width:100%;height:100%;min-width:0;min-height:0;padding-top:8px;overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable}@media(min-width:901px){.anatomy-compare-grid:not([hidden]){grid-template-columns:repeat(2,minmax(0,1fr))}.tool-stage:has(.anatomy-compare-grid:not([hidden])){grid-template-rows:auto minmax(0,1fr) auto}.tool-stage:has(.anatomy-compare-grid:not([hidden])) .stage-title-row{min-height:42px}.tool-stage:has(.anatomy-compare-grid:not([hidden])) .stage-title-row h1{font-size:2.65rem}.anatomy-compare-grid:not([hidden]) .compare-card{height:clamp(280px,calc((100dvh - 220px)/2),500px);min-height:0}.anatomy-compare-grid:not([hidden])[data-compare-count="2"]{align-content:stretch;grid-auto-rows:minmax(0,1fr)}.anatomy-compare-grid:not([hidden])[data-compare-count="2"] .compare-card{height:auto;min-height:0}.anatomy-compare-grid:not([hidden]) .compare-card img{max-height:none}}.compare-card{display:grid;grid-template-rows:auto minmax(0,1fr);gap:8px;min-height:min(500px,calc(100dvh - 240px));padding:10px;border:1px solid rgba(220,232,230,.82);border-radius:var(--radius);background:linear-gradient(180deg,#fff,#fbfdfd)}.compare-card figcaption{display:grid;gap:3px;min-width:0}.compare-card figcaption strong{color:var(--teal-deep);font-weight:900;line-height:1.25}.compare-card figcaption span{font-size:.82rem;-webkit-line-clamp:2}.compare-card img{width:100%;height:100%;max-height:none}.compare-pager,.mobile-carousel-controls{display:none}.cataract-workspace{display:grid;grid-template-columns:196px minmax(0,1fr);gap:12px;height:100%;min-height:0}.cataract-workspace[hidden]{display:none}.cataract-stage-card{display:contents}.procedure-switch{display:none}.step-rail{position:static;display:grid;grid-template-rows:auto 1fr;gap:12px;align-self:start;height:auto;min-height:0;max-height:100%;padding:14px 10px;overflow-y:auto;overscroll-behavior:contain;scrollbar-gutter:stable}.step-rail p{margin:0;color:var(--teal-deep);font-size:.88rem;font-weight:900}.step-rail div{display:grid;align-content:start;gap:8px}.step-rail-button{display:grid;grid-template-columns:30px minmax(0,1fr);align-items:center;gap:8px;width:100%;min-height:44px;padding:6px 8px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;color:var(--muted);font-weight:900;text-align:left}.step-rail-button span{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:6px;background:var(--surface-soft);color:var(--teal-deep);font-size:.86rem}.step-rail-button strong{min-width:0;font-size:.88rem;line-height:1.25}.step-rail-button.is-active{border-color:#0f8b8d52;background:var(--surface-soft);color:var(--teal-deep)}.step-rail-button.is-active span{background:var(--teal);color:#fff}.comparison-scroll{min-width:0;height:100%;min-height:0;max-height:none;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:smooth;scrollbar-gutter:stable;scrollbar-width:thin;scrollbar-color:rgba(15,139,141,.45) transparent}.comparison-step{display:grid;grid-template-rows:auto minmax(0,1fr);gap:10px;min-height:0;margin-bottom:12px;padding:clamp(12px,1.5vw,18px);scroll-margin-top:12px}.comparison-step-head{display:flex;align-items:center;gap:12px;min-height:42px}.comparison-step-number{flex:0 0 auto;color:var(--teal-deep);font-size:.92rem;font-weight:950}.comparison-step-title-line{display:inline-flex;align-items:center;flex-wrap:wrap;gap:8px;min-width:0}.comparison-step-head h1{margin:0;font-size:clamp(1.45rem,2.3vw,2.6rem);line-height:1;letter-spacing:0}.shared-step-badge{display:inline-flex;align-items:center;min-height:24px;margin:0;padding:3px 8px;border:1px solid rgba(15,139,141,.2);border-radius:var(--radius);background:var(--surface-soft);color:var(--teal-deep);font-size:.78rem;font-weight:900;line-height:1;white-space:nowrap}.comparison-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;min-height:0}.comparison-grid.is-shared{grid-template-columns:minmax(0,1fr)}.shared-column{grid-template-rows:auto minmax(0,1fr);width:min(100%,1120px);justify-self:center}.procedure-column{display:grid;grid-template-rows:auto auto minmax(0,1fr);gap:8px;min-width:0;min-height:0}.procedure-column header{display:flex;align-items:center;justify-content:space-between;min-height:38px;border-bottom:1px solid var(--line)}.procedure-column h2{margin:0;color:var(--teal-deep);font-size:clamp(1rem,1.2vw,1.24rem)}.procedure-copy{display:grid;gap:6px;min-width:0}.procedure-copy p{font-size:.88rem;-webkit-line-clamp:2}.comparison-panel{height:clamp(340px,48vh,560px);min-height:0;padding:10px;border:1px solid rgba(220,232,230,.82);border-radius:var(--radius);background:linear-gradient(180deg,#fff,#fbfdfd)}.comparison-panel img{width:100%;height:100%;max-height:none}.shared-column .comparison-panel{height:min(58vh,640px)}.shared-column .comparison-panel img{transform:scale(var(--shared-step-image-scale, 1));transform-origin:center center}.comparison-step[data-cataract-step=empty-bag]{--shared-step-image-scale: 1.08}.comparison-step[data-cataract-step=iol-in-bag]{--shared-step-image-scale: 1.12}.comparison-step[data-cataract-step=empty-bag] .comparison-panel,.comparison-step[data-cataract-step=iol-in-bag] .comparison-panel{overflow:clip}.comparison-empty{display:grid;place-items:center;align-content:center;gap:8px;min-height:360px;border:1px dashed rgba(15,139,141,.28);border-radius:var(--radius);background:var(--surface-soft);color:var(--muted);text-align:center}.comparison-empty span{color:var(--teal-deep);font-size:.86rem;font-weight:900}.comparison-empty strong{max-width:16rem;font-size:1.1rem;line-height:1.45}.empty-state{align-self:center;justify-self:center;padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}@media(min-width:1600px){.education-tool[data-active-module=anatomy],.education-tool[data-active-module=cataract]{--anatomy-topic-rail-width: clamp(232px, 14vw, 264px)}}@media(max-width:1100px){.education-tool[data-active-module=anatomy],.education-tool[data-active-module=cataract]{--anatomy-topic-rail-width: clamp(192px, 17vw, 204px)}.site-header{grid-template-columns:minmax(0,1fr) auto}.header-note{display:none}.brand-hero{grid-template-columns:1fr;align-items:start}.tool-body{display:grid;gap:10px}.drawing-dock{top:10px;right:10px;max-width:calc(100% - 20px)}.stage-toolbar{max-width:calc(100vw - 84px)}.tool-workspace{grid-template-columns:var(--anatomy-topic-rail-width) minmax(0,1fr)}.tool-topic-rail,.tool-stage{order:initial}.stage-heading-line{padding-right:min(360px,34vw)}.stage-title-row h1{font-size:2.65rem}.comparison-step-head{padding-right:0}.cataract-workspace{grid-template-columns:168px minmax(0,1fr)}.comparison-step,.comparison-scroll,.cataract-workspace,.tool-workspace,.tool-stage{min-height:0}}@media(min-width:781px)and (max-width:1320px){.tool-topic-button{grid-template-columns:minmax(0,1fr);gap:0}.tool-topic-button img{display:none}}@media(max-width:780px){html,body,.page-shell{overflow-x:clip}.site-header{position:sticky;grid-template-columns:minmax(0,1fr) auto;min-height:56px;padding:8px 14px;z-index:70}.site-nav{display:none}.brand-home,.placeholder-page,.education-tool{padding:10px}.education-tool{--mobile-anatomy-rail-height: 64px;--mobile-carousel-controls-height: 58px;--mobile-cataract-controls-height: 64px;--mobile-drawing-dock-bottom-clearance: calc( var(--mobile-anatomy-rail-height) + var(--mobile-carousel-controls-height) + 24px );--mobile-stage-spacing: clamp(16px, 4vw, 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h1{font-size:clamp(2rem,10vw,3rem)}.tool-workspace{grid-template-columns:minmax(0,1fr);align-items:start;align-content:start;gap:8px}.tool-topic-rail{order:2}.tool-stage{order:1}.education-tool[data-active-module=anatomy] .tool-workspace{min-height:0;padding-bottom:0}.tool-stage{align-self:stretch;grid-template-rows:auto minmax(0,1fr) auto;align-content:stretch;gap:var(--mobile-stage-spacing);padding:var(--mobile-stage-spacing)}.education-tool[data-active-module=anatomy] .tool-stage{height:calc(100svh - 56px - 24px - var(--mobile-anatomy-rail-height));min-height:0}.tool-stage:has(.anatomy-compare-grid:not([hidden])){grid-template-rows:auto minmax(0,1fr) auto}.stage-title-row{display:grid;gap:6px;min-height:0;padding:0}.stage-heading-line{gap:8px;padding:0}.stage-title-row h1{font-size:clamp(1.35rem,6.8vw,2.15rem);line-height:1.06;text-box:trim-both cap alphabetic}.summary-toggle{flex-basis:44px;width:44px;height:44px;min-height:44px}.stage-summary{gap:0;max-height:min(7rem,22svh);overflow-y:auto;overscroll-behavior:contain;padding-right:2px}.stage-summary p{max-width:none;font-size:.82rem;line-height:1.45}.drawing-dock{position:fixed;z-index:62;top:var( --drawing-dock-y, clamp( calc(66px + env(safe-area-inset-top)) , calc(100svh - var(--mobile-drawing-dock-bottom-clearance) - 48px - env(safe-area-inset-bottom)), calc(100svh - 60px - env(safe-area-inset-bottom)) ) );right:auto;bottom:auto;left:var(--drawing-dock-x, calc(100vw - 60px - env(safe-area-inset-right)) );display:block;width:48px;height:48px;max-width:none;touch-action:none}.topic-sheet-backdrop:not([hidden]){position:fixed;inset:0;z-index:80;display:block;width:auto;min-height:0;padding:0;border:0;background:#08191c52}.education-tool.is-topic-sheet-open .drawing-dock{opacity:0;pointer-events:none}.drawing-toggle{width:48px;height:48px;min-height:48px;border-radius:999px;cursor:grab;touch-action:none}.drawing-dock.is-dragging .drawing-toggle{cursor:grabbing;box-shadow:0 20px 42px #152d3033}.stage-toolbar{position:absolute;top:var(--drawing-toolbar-y, 0);right:calc(100% + 8px);bottom:auto;left:auto;display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"swatches clear";gap:7px;width:min(176px,calc(100vw - 24px));min-height:0;max-height:none;max-width:none;padding:7px;overflow:hidden}.drawing-dock[data-dock-side=left] .stage-toolbar{right:auto;left:calc(100% + 8px)}.drawing-dock[data-dock-side=right] .stage-toolbar{right:calc(100% + 8px);left:auto}.swatches{grid-area:swatches;flex-wrap:nowrap;justify-content:flex-start;gap:5px}.swatch{width:25px;height:25px}.anatomy-panel{align-self:stretch;display:grid;place-items:center;height:100%;min-height:0;padding:2px}.anatomy-panel img{width:auto;height:auto;max-width:100%;max-height:100%;object-position:center center}.stroke-control{display:none}.stroke-control span{flex:0 0 auto}.stroke-control input{width:100%;min-width:0}.clear-drawing{grid-area:clear;width:25px;height:25px;min-width:25px;min-height:25px}.clear-drawing svg{width:21px;height:21px}.tool-topic-list{display:none;align-items:start;gap:0;width:100%;max-width:100%;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:2px 2px 4px 0;scrollbar-width:thin;scrollbar-color:rgba(15,139,141,.45) transparent}.tool-topic-group{display:grid;gap:6px;min-width:0}.tool-topic-group+.tool-topic-group{margin-top:6px;padding-top:6px;border-top:1px solid var(--line)}.tool-topic-group-title{min-height:34px;margin:0;padding:0 8px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--teal-deep);font-size:.9rem;white-space:nowrap}.tool-topic-group-items{display:grid;gap:6px;max-width:100%;padding-bottom:2px}.tool-topic-list::-webkit-scrollbar{width:6px}.tool-topic-rail{align-self:start;grid-template-rows:auto;align-content:start;gap:6px;overflow:hidden;padding:6px}.tool-rail-head{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:6px}.rail-toggle-all{display:none}.topic-sheet-toggle{display:grid;justify-items:start;min-width:0;min-height:50px;padding:6px 10px;border:1px solid rgba(15,139,141,.2);border-radius:var(--radius);background:#fff;color:var(--teal-deep);text-align:left}.topic-sheet-toggle span{color:var(--muted);font-size:.72rem;font-weight:900;line-height:1.1}.topic-sheet-toggle strong{max-width:100%;overflow:hidden;font-size:.9rem;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.topic-sheet-close{align-items:center;justify-content:center;width:40px;min-height:40px;border:1px solid rgba(15,139,141,.22);border-radius:var(--radius);background:#fff;color:var(--teal-deep)}.tool-topic-rail.is-sheet-open .topic-sheet-grip{display:block;justify-self:center;width:42px;height:5px;border-radius:999px;background:#61737b52;touch-action:none}.tool-topic-rail.is-sheet-open .tool-rail-head{touch-action:none}.clear-compare{width:50px;height:50px;min-width:50px;min-height:50px}.education-tool[data-active-module=anatomy] .tool-topic-rail{position:fixed;right:max(10px,env(safe-area-inset-right));bottom:max(10px,env(safe-area-inset-bottom));left:max(10px,env(safe-area-inset-left));z-index:23;width:min(520px,calc(100vw - 20px));max-height:var(--mobile-anatomy-rail-height);margin:0 auto;transform:translateY(0)}.education-tool[data-active-module=anatomy] .tool-topic-rail.is-sheet-open{z-index:81;grid-template-rows:auto auto minmax(0,1fr);height:min(72svh,560px);max-height:min(72svh,560px);padding:10px;transition:transform .14s ease}.education-tool[data-active-module=anatomy] .tool-topic-rail.is-sheet-dragging{transform:translateY(var(--topic-sheet-drag-y, 0));transition:none}.tool-topic-rail.is-sheet-open .tool-rail-head{grid-template-columns:minmax(0,1fr) auto 40px}.tool-topic-rail.is-sheet-open .tool-rail-head:has(.clear-compare[hidden]){grid-template-columns:minmax(0,1fr) 40px}.tool-topic-rail.is-sheet-open .rail-toggle-all{display:inline-flex}.tool-topic-rail.is-sheet-open .topic-sheet-toggle{display:none}.tool-topic-rail.is-sheet-open .topic-sheet-close,.tool-topic-rail.is-sheet-open .tool-topic-list{display:grid}.tool-topic-rail.is-sheet-open .topic-sheet-close{height:40px}.tool-topic-rail.is-sheet-open .clear-compare{align-self:center;width:44px;height:44px;min-width:44px;min-height:44px}.tool-topic-row{grid-template-columns:30px minmax(0,1fr);justify-items:stretch;min-height:50px;padding:4px 6px;text-align:left}.topic-check{width:30px;min-height:34px}.topic-check span{width:24px;height:24px}.tool-topic-button{grid-template-columns:42px minmax(0,1fr);justify-items:start;gap:8px;min-height:44px;padding:4px 6px 4px 0;text-align:left}.tool-topic-button img{display:block;width:42px;height:34px}.topic-title{font-size:.78rem;line-height:1.2;-webkit-line-clamp:2;line-clamp:2}.topic-sheet-toggle,.topic-sheet-close,.clear-compare,.share-trigger,.share-close,.summary-toggle,.tool-topic-button,.topic-check,.carousel-arrow,.carousel-dots button,.procedure-switch button{touch-action:manipulation}.anatomy-compare-grid{display:flex;align-self:stretch;grid-template-columns:none;gap:8px;height:100%;min-height:0;padding-top:0;overflow-x:auto;overflow-y:hidden;scroll-padding:0;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:none}.anatomy-compare-grid::-webkit-scrollbar{display:none}.compare-card{grid-template-rows:minmax(0,1fr);place-items:center;flex:0 0 100%;width:100%;height:100%;min-height:0;padding:2px;scroll-snap-align:center}.compare-card figcaption{display:none}.compare-card img{width:auto;height:auto;max-width:100%;max-height:100%;object-position:center center}.mobile-carousel-controls{grid-template-columns:40px minmax(0,1fr) 40px;align-items:center;gap:8px;padding:6px;border:1px solid rgba(220,232,230,.9);border-radius:var(--radius);background:#fffffff0;box-shadow:0 18px 36px #152d3024;backdrop-filter:blur(16px)}.mobile-carousel-controls:not([hidden]){display:grid}.anatomy-carousel-controls:not([hidden]){align-self:stretch;width:100%}.carousel-dots:not([hidden]){display:flex;justify-content:center;gap:7px}.carousel-dots 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