:root{--night:#14110E;--night-3:#2E2721;--paper:#FFFFFF;--ivory:#F8F5F0;--ivory-2:#F0EAE1;--ink:#1C1815;--ink-2:#5F574E;--line:#E7E0D6;--line-2:#D6CCBE;--gold:#A08247;--gold-ink:#7E6228;--gold-lt:#C9A96E;--on-night:#EDE7DE;--sans:'Noto Sans JP','Hiragino Sans','Yu Gothic',sans-serif;--fig:'Noto Sans JP','Helvetica Neue',Arial,sans-serif;--mincho:'Shippori Mincho B1','Hiragino Mincho ProN','Yu Mincho',serif;--gutter:clamp(22px,5.5vw,80px);--nav-height:86px}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--nav-height)}
body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--sans);font-size:16px;line-height:1.95;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,p,figure{margin:0}h1,h2,h3,h4{font-weight:500}
a{color:inherit;text-underline-offset:5px}button{font:inherit;color:inherit;cursor:pointer}
img{display:block;max-width:100%}button,a{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible{outline:2px solid var(--gold-ink);outline-offset:6px}
.wrap{width:calc(100% - var(--gutter)*2);max-width:1240px;margin-inline:auto}
.num{font-family:var(--fig);font-weight:500;font-variant-numeric:lining-nums tabular-nums;font-feature-settings:'tnum' 1,'lnum' 1;letter-spacing:.01em}
.overline{font-family:var(--sans);font-size:13px;font-weight:500;line-height:1.7;letter-spacing:.1em;color:var(--gold-ink)}
.skip-link{position:fixed;top:8px;left:16px;z-index:80;padding:10px 18px;background:var(--paper);transform:translateY(-160%)}.skip-link:focus{transform:none}
.site-header{border-bottom:1px solid var(--line)}.header-inner{height:84px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{font-family:Marcellus,serif;font-size:23px;letter-spacing:.14em;text-decoration:none;white-space:nowrap}.header-inner>span{font-size:12px;color:var(--ink-2);letter-spacing:.06em}
/* The unmarked, original clinical photographs introduce the case. */
.case-hero{display:grid;grid-template-columns:.84fr 1.5fr;grid-template-areas:'heading photos' 'intro photos';column-gap:70px;row-gap:26px;align-content:center;padding-block:70px 76px}
.hero-heading{grid-area:heading;align-self:end}.hero-meta{display:flex;align-items:center;gap:20px;font-size:12px;letter-spacing:.05em;color:var(--ink-2)}.hero-meta>span:first-child{color:var(--gold-ink);letter-spacing:.14em}.hero-meta b{margin-left:6px;font-weight:500}
.hero-heading h1{font-family:var(--mincho);font-size:clamp(38px,4vw,54px);line-height:1.6;letter-spacing:.025em;margin-top:28px;white-space:nowrap}
.hero-subtitle{font-size:13px;letter-spacing:.03em;color:var(--ink-2);margin-top:23px}.hero-intro{grid-area:intro;align-self:start;border-left:1px solid var(--gold);padding-left:22px}.hero-intro>p:first-child{font-family:var(--mincho);font-size:22px;line-height:1.9}.hero-intro>p+p{font-size:14px;color:var(--ink-2);margin-top:14px;line-height:2}.hero-photos{grid-area:photos;min-width:0}
.comparison{display:grid;grid-template-columns:1fr 1fr;gap:12px}.comparison figcaption{display:flex;align-items:baseline;justify-content:space-between;gap:10px;padding-bottom:10px;line-height:1.5}.comparison figcaption>span:first-child{font-size:14px;font-weight:500}.comparison figcaption>span[lang]{font-size:12px;color:var(--ink-2);letter-spacing:.035em}
.photo-frame{position:relative}.photo-window{display:block;position:relative;overflow:hidden;background:var(--night);cursor:zoom-in}.fullface .photo-window{aspect-ratio:4/5}.fullface img{width:100%;height:100%;object-fit:contain}
.photo-tools{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:14px}.photo-tools p{font-size:11px;color:var(--ink-2)}.photo-tools button{font-size:12px;white-space:nowrap;background:none;border:0;padding:8px 0;min-height:44px}.photo-tools button span{margin-left:12px;font-size:18px;color:var(--gold-ink)}
.chapter-navigation{position:sticky;top:0;z-index:20;background:var(--paper);border-block:1px solid var(--line)}.chapter-links{display:grid;grid-template-columns:repeat(4,1fr)}.chapter-links a{display:flex;align-items:center;gap:18px;min-height:var(--nav-height);padding:12px 25px;text-decoration:none;position:relative}.chapter-links a+a{border-left:1px solid var(--line)}.chapter-links .num{font-size:24px;color:var(--gold)}.chapter-links a>span:last-child{font-size:15px}.chapter-links a::after{content:'';position:absolute;bottom:0;left:25px;right:25px;height:2px;background:var(--gold);transform:scaleX(0);transition:transform .2s ease}.chapter-links a:hover,.chapter-links a[aria-current]{background:var(--ivory)}.chapter-links a[aria-current]::after{transform:scaleX(1)}.chapter-links a[aria-current]>.num{color:var(--gold-ink)}.reading-progress{height:2px;position:absolute;bottom:-1px;left:0;width:100%;background:var(--gold);transform:scaleX(var(--progress,0));transform-origin:left;pointer-events:none;opacity:.5}
.chapter-heading h2 span{display:inline-block}
.chapter-links{grid-template-columns:repeat(3,minmax(0,1fr))}
/* Each chapter: photographs and actual treatments, then the physician's assessment. */
.chapter{padding-block:48px 56px;scroll-margin-top:0}.chapter+.chapter{border-top:0}.chapter-heading{display:flex;gap:25px;align-items:center;margin-bottom:32px}.chapter-number{font-size:42px;line-height:1.5;color:var(--gold);min-width:64px}.chapter-heading h2{font-family:var(--mincho);font-size:clamp(28px,2.5vw,34px);line-height:1.6;letter-spacing:.025em;margin-top:7px}
.chapter-main{display:grid;grid-template-columns:1.05fr 1fr;gap:42px;align-items:start}.case-visual{min-width:0}.photo-guide-controls{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;min-height:40px}.photo-guide-controls button{font-size:12px;border:0;border-bottom:1px solid var(--line-2);padding:7px 0;background:none;min-height:40px;color:var(--gold-ink)}
.closeup .photo-frame{aspect-ratio:10/14}.closeup .photo-window{aspect-ratio:1}.closeup img{position:absolute;max-width:none;width:var(--zoom,145%);height:auto;top:50%;left:50%;transform:translate(-50%,var(--offset,-50%))}.closeup-mouth{--zoom:170%;--offset:-75%}.closeup-eye{--zoom:138%;--offset:-50%}.closeup-skin{--zoom:155%;--offset:-57%}
.photo-guide{position:absolute;inset:0;pointer-events:none}.photo-guide svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}.photo-guide .leader-halo{fill:none;stroke:var(--night);stroke-width:2.5;stroke-opacity:.4;vector-effect:non-scaling-stroke}.photo-guide .leader{fill:none;stroke:var(--on-night);stroke-width:1.25;vector-effect:non-scaling-stroke}.photo-guide circle{fill:var(--gold-lt);stroke:var(--night);stroke-width:.5;stroke-opacity:.5;vector-effect:non-scaling-stroke}.guide-labels{position:absolute;top:80%;width:100%;display:grid;grid-template-columns:1fr 1fr;gap:5px;text-align:center;font-size:12px;color:var(--gold-ink);line-height:1.65;letter-spacing:0}.guide-labels>span{padding-inline:2px;word-break:keep-all}.guides-off .photo-guide{visibility:hidden}
.anatomy{background:var(--ivory);padding:22px 26px;min-width:0}
.figure-head{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:32px}
.figure-head a{font-size:12px;color:var(--gold-ink);text-decoration:none;padding:5px 0}
.anatomy .figure-head h3{font-family:var(--sans);font-size:13px;line-height:1.7;margin:0}
.anatomy-map{position:relative;width:100%;margin-top:20px}
.layer-labels{position:relative;height:30px;font-size:13px;color:var(--ink-2);line-height:1.5}
.layer-label{position:absolute;left:var(--label-x);top:0;transform:translateX(-50%);white-space:nowrap;text-align:center}
.layer-label::after{content:'';position:absolute;left:50%;top:100%;width:1px;height:11px;background:var(--line-2)}
.layer-focus{color:var(--gold-ink);font-weight:600}
.layer-label.layer-focus::after{background:var(--gold)}
.anatomy .anatomy-image{position:relative;display:block;width:100%;height:auto;aspect-ratio:var(--crop-ratio);overflow:hidden;cursor:zoom-in;margin:0}
.anatomy .anatomy-image>img{position:absolute;left:var(--source-left);top:var(--source-top);width:var(--source-width);height:auto;max-width:none;max-height:none;mix-blend-mode:multiply}
.dialog-body>.anatomy .anatomy-image>img{max-height:none}
.anatomy-pointers{position:absolute;inset:0;pointer-events:none}
.anatomy-pointer{position:absolute;left:var(--label-x);top:0;height:var(--target-y);width:1px;background:var(--line-2)}
.anatomy-pointer::after{content:'';position:absolute;bottom:-2px;left:-2px;width:5px;height:5px;border-radius:50%;background:var(--ink-2);box-shadow:0 0 0 1px var(--ivory)}
.anatomy-pointer.layer-focus,.anatomy-pointer.layer-focus::after{background:var(--gold-ink)}
.anatomy figcaption{font-size:14px;line-height:1.8;color:var(--ink-2);margin-top:12px}
.assessment{margin-top:28px;border-top:1px solid var(--line-2);border-bottom:1px solid var(--line);padding:28px 36px 32px;background:var(--ivory)}.assessment-heading{margin-bottom:18px}.assessment h3{font-family:var(--mincho);font-size:25px;line-height:1.8;margin-top:8px}.assessment-body{max-width:64em;margin-top:17px}.assessment-body p{font-size:16px;line-height:2.1;color:var(--ink-2);text-wrap:pretty}.assessment-body p+p{margin-top:10px}
.assessment-lead{max-width:66em;font-size:16px;line-height:2.1;color:var(--ink-2);text-wrap:pretty}
.assessment .assessment-body{max-width:none;margin-top:24px}
.assessment-item{display:grid;grid-template-columns:240px minmax(0,1fr);gap:30px;padding-top:23px;border-top:1px solid var(--line-2)}
.assessment-item+.assessment-item{margin-top:23px}
.assessment-item h4{font-size:16px;font-weight:500;line-height:1.9;color:var(--gold-ink);overflow-wrap:anywhere;text-wrap:balance}
.assessment-item p{max-width:56em;overflow-wrap:anywhere}
@media(max-width:1100px){.assessment-item{grid-template-columns:190px minmax(0,1fr);gap:25px}}
@media(max-width:760px){.assessment-item{grid-template-columns:1fr;gap:10px;padding-top:19px}.assessment-item+.assessment-item{margin-top:22px}.assessment-lead{font-size:16px;line-height:2}.assessment .assessment-body{margin-top:22px}}
@media(max-width:480px){.assessment-lead{font-size:15px}.assessment-item h4{font-size:16px}}
.treatment-options{margin-top:35px}.options-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px}.options-heading h3{font-family:var(--mincho);font-size:23px;line-height:1.7}.options-heading p{font-size:12px;color:var(--ink-2)}
.treatment-grid{display:grid;gap:16px}.cards-1{grid-template-columns:1fr}.cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}.cards-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.treatment-card{min-width:0;border:1px solid var(--line);background:var(--paper);padding:24px;display:flex;flex-direction:column;transition:border-color .18s ease}.treatment-card:hover{border-color:var(--gold)}
.product-image{height:214px;display:flex;align-items:center;justify-content:center;gap:18px;margin-bottom:22px;--display-height:188px}.cutout{display:block;position:relative;flex:none;width:min(100%,calc(var(--display-height)*var(--cw)/var(--ch)));aspect-ratio:var(--cw)/var(--ch);overflow:hidden}.cutout img{position:absolute;max-width:none;width:calc(1448/var(--cw)*100%);height:auto;left:calc(var(--cx)/var(--cw)*-100%);top:calc(var(--cy)/var(--ch)*-100%)}.card-rf .cutout{max-width:calc(50% - 9px)}
.card-ha .product-image>.product-cutout-photo{display:block;width:100%;height:100%;max-width:100%;max-height:var(--display-height);object-fit:contain;object-position:center;min-width:0}
.product-copy{display:flex;flex-direction:column;flex:1;min-width:0}.product-copy h4{font-size:19px;line-height:1.65;margin-top:6px;letter-spacing:.005em}.product-note{font-size:12px;color:var(--ink-2);margin:5px 0 18px;line-height:1.7}.card-rf h4 span{display:inline-block;white-space:nowrap}.product-links{display:flex;flex-wrap:wrap;gap:0 16px;border-top:1px solid var(--line);padding-top:10px;margin-top:auto}.product-links a{display:flex;justify-content:space-between;gap:14px;font-size:12px;line-height:1.7;align-items:center;min-height:38px;text-decoration:none;flex:1;white-space:nowrap}.product-links a span{font-size:20px;color:var(--gold-ink)}.product-links a:hover{color:var(--gold-ink)}
.cards-1 .treatment-card{display:grid;grid-template-columns:.9fr 1.5fr;align-items:center;gap:55px;padding:24px 42px}.cards-1 .product-image{margin:0;height:185px;--display-height:155px}.cards-1 .product-copy h4{font-family:var(--mincho);font-size:28px}.cards-1 .product-note{font-size:15px}.cards-1 .product-links{max-width:330px}
.illustration-note{font-size:12px;color:var(--ink-2);line-height:1.9;padding:0 0 45px;max-width:78em}
.image-dialog{position:fixed;inset:0;max-width:1160px;width:calc(100% - 64px);max-height:calc(100dvh - 48px);padding:24px 30px 30px;border:1px solid var(--line-2);color:var(--ink);background:var(--paper);overflow:auto;overscroll-behavior:contain}.image-dialog::backdrop{background:rgba(20,17,14,.78)}.dialog-heading{position:sticky;top:-24px;z-index:2;background:var(--paper);display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:18px}.dialog-heading h2{font-family:var(--mincho);font-size:22px}.dialog-close{border:0;background:var(--ivory);padding:8px 16px;min-height:44px;font-size:14px;white-space:nowrap}.dialog-close span{font-size:24px;margin-left:15px}.dialog-body>.comparison{max-width:900px;margin:auto}.dialog-body .photo-window{background:var(--paper)}.dialog-body .fullface .photo-window{max-height:calc(100dvh - 180px)}.dialog-body>.anatomy{max-width:950px;margin:auto}.dialog-body>.anatomy .figure-head,.dialog-body>.anatomy h3{display:none}.dialog-body>.anatomy img{max-height:calc(100dvh - 260px);object-fit:contain}.dialog-body a{pointer-events:none}.dialog-open{overflow:hidden}
@media(min-width:1600px){.case-hero{padding-block:88px 90px}.hero-heading h1{font-size:58px}}
@media(max-width:1100px){.case-hero{column-gap:36px;grid-template-columns:.86fr 1.2fr;padding-block:54px}.hero-heading h1{font-size:40px}.hero-meta{gap:12px;font-size:11px}.hero-subtitle{font-size:12px}.hero-intro>p:first-child{font-size:20px}.hero-intro>p+p{font-size:13px}.hero-intro br.desktop-only{display:none}.chapter-main{gap:28px}.anatomy{padding:18px}.anatomy h3{font-size:20px}.layer-labels{font-size:12px}.chapter-links a{padding-inline:16px;gap:14px}.chapter-links a>span:last-child{font-size:14px}.cards-4{grid-template-columns:repeat(2,minmax(0,1fr))}.treatment-card{padding:20px}.options-heading{display:block}.options-heading p{margin-top:7px}}
@media(max-width:760px){
:root{--nav-height:78px;--gutter:24px}.header-inner{height:70px}.brand{font-size:19px}.header-inner>span{display:none}
.case-hero{grid-template-columns:1fr;grid-template-areas:'heading' 'photos' 'intro';gap:28px;padding-block:34px 36px}.hero-heading h1{font-size:40px;line-height:1.55;margin-top:18px}.hero-subtitle{margin-top:13px}.hero-meta{font-size:12px;gap:24px}.hero-intro{padding-left:18px;display:grid;grid-template-columns:1fr 1.4fr;gap:24px;align-items:center}.hero-intro>p:first-child{font-size:21px}.hero-intro>p+p{font-size:14px;margin:0}.hero-intro .desktop-only{display:none}.fullface .photo-window{max-height:470px}.photo-tools{margin-top:8px;gap:8px}.photo-tools p{font-size:11px}
.chapter-links{width:100%;padding-inline:12px}.chapter-links a{justify-content:center;gap:8px;padding:10px 8px}.chapter-links a>span:last-child{font-size:12px}.chapter-links .num{font-size:21px}.chapter-links a::after{left:12px;right:12px}
.chapter{padding-block:32px 40px}.chapter-heading{gap:17px;margin-bottom:23px;align-items:flex-start}.chapter-number{font-size:30px;min-width:40px;padding-top:8px}.chapter-heading h2{font-size:28px;line-height:1.6;max-width:17em}.chapter-main{grid-template-columns:1fr;gap:12px}.photo-guide-controls{margin-bottom:10px}.comparison{gap:12px}.guide-labels{font-size:13px}.anatomy{padding:22px}.anatomy h3{font-size:22px}.layer-labels{font-size:13px}.anatomy-image{height:220px}.anatomy figcaption{font-size:14px}
.assessment{margin-top:22px;padding:24px}.assessment h3{font-size:23px;line-height:1.75}.assessment-body p{font-size:16px;line-height:2}.assessment-body p+p{margin-top:15px}
.options-heading h3{font-size:22px}.options-heading p{font-size:12px;line-height:1.85}.treatment-grid{gap:12px}.cards-3,.cards-4{grid-template-columns:repeat(2,minmax(0,1fr))}.cards-3 .card-ha{grid-column:1/-1;display:grid;grid-template-columns:1fr 1.2fr;gap:28px;align-items:center}.treatment-card{padding:20px}.product-image{height:180px;--display-height:160px;margin-bottom:18px}.product-copy h4{font-size:18px}.cards-1 .treatment-card{gap:30px;padding:24px;grid-template-columns:1fr 1.2fr}.cards-1 .product-image,.cards-3 .card-ha .product-image{height:160px;margin:0;--display-height:150px}.cards-1 .product-copy h4{font-size:24px}.cards-1 .product-note{font-size:13px}.product-links{gap:0 12px}.card-rf .product-links{flex-direction:column}.product-links a{min-height:42px;font-size:12px}
.illustration-note{font-size:11px;padding-bottom:35px}
.image-dialog{width:calc(100% - 24px);padding:16px;max-height:calc(100dvh - 24px)}.dialog-heading h2{font-size:18px}.dialog-close{font-size:12px;padding:5px 10px}.dialog-close span{margin-left:7px}.dialog-body>.anatomy{padding:14px}.dialog-body>.anatomy .layer-labels{font-size:11px}}
@media(max-width:480px){
:root{--gutter:20px;--nav-height:76px}.brand{font-size:17px;letter-spacing:.11em}.hero-heading h1{font-size:35px}.hero-meta{font-size:11px}.hero-subtitle{font-size:12px}.case-hero{gap:22px;padding-top:28px}.hero-intro{display:block;padding-left:17px}.hero-intro>p:first-child{font-size:20px;line-height:1.65}.hero-intro>p+p{margin-top:9px;font-size:14px}.photo-tools{align-items:start}.photo-tools p{font-size:10px;line-height:1.7;max-width:22em;padding-top:10px}.photo-tools button{font-size:11px}.photo-tools button span{margin-left:4px}.chapter-links a{flex-direction:column;gap:2px;padding:7px 4px}.chapter-links a>span:last-child{font-size:12px;white-space:nowrap}.chapter-links .num{font-size:20px;line-height:1.5}.chapter-heading{gap:12px}.chapter-number{font-size:28px;min-width:36px}.chapter-heading h2{font-size:26px}.overline{font-size:12px}.comparison{gap:8px}.comparison figcaption>span:first-child{font-size:13px}.comparison figcaption>span[lang]{font-size:11px}.guide-labels{font-size:12px;gap:2px;line-height:1.6}.photo-guide-controls button{font-size:11px;min-height:44px}.anatomy{padding:18px 14px}.anatomy h3{font-size:20px}.layer-labels{font-size:12px}.anatomy-image{height:200px}.anatomy figcaption{font-size:14px}.assessment{padding:22px 18px}.assessment h3{font-size:22px}.assessment-body p{font-size:15px}.treatment-card{padding:17px 14px}.product-image{height:160px;--display-height:145px;gap:10px;margin-bottom:16px}.card-rf .cutout{max-width:calc(50% - 5px)}.product-copy h4{font-size:17px}.product-copy .overline{font-size:11px}.product-note{font-size:11px}.product-links{padding-top:6px}.product-links a{font-size:11px;gap:6px}.cards-1 .treatment-card,.cards-3 .card-ha{padding:22px 18px;gap:20px;grid-template-columns:1fr 1.25fr}.cards-1 .product-image,.cards-3 .card-ha .product-image{height:120px;--display-height:100px}.cards-1 .product-copy h4{font-family:var(--sans);font-size:20px}.cards-1 .product-note{font-size:12px}
.dialog-heading h2{font-size:17px}}
@media(max-width:600px){.dialog-body>.comparison{grid-template-columns:1fr;max-width:390px}.dialog-body .comparison figure+figure{margin-top:18px}.dialog-body .fullface .photo-window{max-height:none}.dialog-body .guide-labels{font-size:14px}.image-dialog .dialog-heading{top:-16px;gap:10px}.dialog-heading h2{line-height:1.65}.dialog-body>.anatomy img{max-height:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}

/* Confirmed BTX sites and the muscle illustration remain within chapter 01. */
.muscle-note{margin-top:32px;padding-top:30px;border-top:1px solid var(--line)}
.muscle-main{grid-template-columns:1.05fr 1fr;gap:42px}
.muscle-explanation{padding:3px 0 0;min-width:0}
.muscle-explanation h3{font-family:var(--mincho);font-size:28px;line-height:1.65;margin:10px 0 18px}
.muscle-explanation>p:not(.overline){font-size:15px;line-height:2;color:var(--ink-2)}
.treated-sites{display:flex;gap:10px;margin:20px 0}
.treated-sites span{border:1px solid var(--line-2);padding:5px 22px;color:var(--gold-ink);background:var(--ivory);font-size:14px}
.muscle-explanation>p.mechanism-source{font-size:11px;line-height:1.9}
.mechanism-source a{text-underline-offset:3px}
@media(max-width:1100px){.muscle-main{gap:28px;grid-template-columns:1.1fr 1fr}}
@media(max-width:760px){.muscle-main{grid-template-columns:1fr;gap:24px}.muscle-explanation{padding:0 3px}.muscle-explanation h3{font-size:25px}}

/* A short, physician-led assessment with three readable takeaways. */
.assessment .assessment-heading{display:grid;grid-template-columns:88px minmax(0,1fr);gap:26px;align-items:center;margin:0}
.assessment-author{align-self:start;text-align:center}
.assessment-author img{width:88px;height:98px;object-fit:cover;object-position:50% 17%;border:1px solid var(--line)}
.assessment-author p{font-size:12px;line-height:1.6;color:var(--ink-2);margin-top:7px;white-space:nowrap}
.assessment-author p span{font-size:10px;margin-left:5px}
.assessment-summary h3{margin:6px 0 10px;font-size:24px;line-height:1.6}
.assessment .assessment-lead{font-size:15px;line-height:1.9}
.assessment .assessment-body{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:23px;padding-top:21px;border-top:1px solid var(--line-2)}
.assessment .assessment-item{display:block;padding:0;border:0;margin:0}
.assessment .assessment-item+.assessment-item{border-left:1px solid var(--line-2);padding-left:24px}
.assessment .assessment-item h4{font-size:15px;line-height:1.7;margin-bottom:7px}
.assessment .assessment-item p{font-size:15px;line-height:1.9}
@media(max-width:760px){
 .assessment .assessment-heading{grid-template-columns:66px minmax(0,1fr);gap:17px;align-items:start}
 .assessment-author img{width:66px;height:78px}
 .assessment-author p{font-size:10px}.assessment-author p span{display:block;margin:0;font-size:9px}
 .assessment-summary .overline{font-size:11px;letter-spacing:.05em}
 .assessment-summary h3{font-size:20px;line-height:1.6;margin:5px 0 8px}
 .assessment .assessment-lead{font-size:14px;line-height:1.9}
 .assessment .assessment-body{grid-template-columns:1fr;gap:0;margin-top:20px;padding-top:16px}
 .assessment .assessment-item+.assessment-item{border-left:0;border-top:1px solid var(--line);margin-top:13px;padding:13px 0 0}
 .assessment .assessment-item h4{margin-bottom:5px;font-size:14px}
.assessment .assessment-item p{font-size:14px;line-height:1.9}
}

/* Mobile keeps the assessment readable below the photo; structure remains an
   optional disclosure directly underneath. */
@media(max-width:760px){
 .chapter-main.chapter-overview>.assessment{padding:22px 18px 24px}
 .chapter-main.chapter-overview>.assessment .assessment-item p{font-size:14px;line-height:1.9}
}

/* Patient reading flow: identify the treatment before exploring the anatomy. */
.case-hero .hero-intro{display:block;border-left:0;padding-left:0;max-width:32em}
.case-hero .hero-intro>p.overline{font-family:var(--sans);font-size:12px;line-height:1.7;color:var(--gold-ink)}
.hero-treatment-list{list-style:none;margin:12px 0 15px;padding:0;display:flex;flex-wrap:wrap;gap:8px 16px;color:var(--ink-2)}
.hero-treatment-list li{font-size:15px;line-height:1.9;white-space:nowrap}
.hero-treatment-list li span{font-size:11px;margin-left:7px}
.case-hero .hero-intro>p:not(.overline){font-size:14px;line-height:1.9;color:var(--ink-2)}
.case-reading-link{display:inline-flex;align-items:center;justify-content:space-between;gap:40px;min-height:44px;margin-top:17px;padding:7px 0;border-bottom:1px solid var(--gold);font-size:13px;text-decoration:none;color:var(--gold-ink)}
.case-reading-link span{font-size:18px}
.case-back{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-size:12px;line-height:1.7;color:var(--ink-2);text-decoration:none}
.case-back:hover{color:var(--gold-ink)}
.chapter-main.chapter-overview{grid-template-columns:minmax(0,1.25fr) minmax(0,.9fr);gap:48px}
.chapter-main.chapter-overview>.assessment{margin-top:0;min-width:0;align-self:start;padding:24px 26px 26px}
.chapter-main.chapter-overview>.assessment .assessment-body{display:block;margin-top:18px;padding-top:16px}
.chapter-main.chapter-overview>.assessment .assessment-item{padding-top:14px}
.chapter-main.chapter-overview>.assessment .assessment-item+.assessment-item{border-left:0;border-top:1px solid var(--line-2);margin-top:13px;padding:13px 0 0}
.chapter-main.chapter-overview>.assessment .assessment-item h4{font-size:14px;margin-bottom:4px}
.chapter-main.chapter-overview>.assessment .assessment-item p{font-size:13px;line-height:1.8}
.chapter-treatments{min-width:0;padding-top:8px}
.structure-details{margin-top:22px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.structure-details>summary{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:88px;padding:18px 22px;list-style:none;cursor:pointer}
.structure-details>summary::-webkit-details-marker{display:none}
.structure-details>summary::marker{content:''}
.structure-summary-copy{display:flex;align-items:center;gap:24px;min-width:0}
.structure-summary-copy .overline{flex-shrink:0;font-size:11px}
.structure-summary-title{font-size:15px;line-height:1.7;color:var(--ink-2)}
.disclosure-icon{position:relative;width:30px;height:30px;flex:0 0 30px;border:1px solid var(--line-2);border-radius:50%;color:var(--gold-ink)}
.disclosure-icon::before,.disclosure-icon::after{content:'';position:absolute;background:currentColor;left:9px;top:14px;width:10px;height:1px}
.disclosure-icon::after{transform:rotate(90deg);transition:transform .18s ease}
.structure-details[open] .disclosure-icon::after{transform:rotate(0)}
.structure-details>summary:hover{background:var(--ivory)}
.structure-details>summary:focus-visible{outline:2px solid var(--gold-ink);outline-offset:4px}
.structure-content{padding:6px 0 28px}
.structure-content>.anatomy{max-width:760px;margin-inline:auto}
.chapter-eye .structure-content{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.chapter-eye .structure-content>.anatomy{width:100%}
.structure-content .muscle-note{margin:0;padding:0;border:0;min-width:0;scroll-margin-top:calc(var(--nav-height) + 16px)}
.structure-content .muscle-main{display:block}
.structure-content .muscle-explanation{padding:20px 22px 0}
.structure-content .muscle-explanation h3{font-size:23px;margin:6px 0 12px}
.structure-content .muscle-explanation>p:not(.overline){font-size:14px;line-height:1.9}
.structure-content .muscle-explanation>p.mechanism-source{font-size:11px}
.structure-content .treated-sites{margin:15px 0}
@media(max-width:1100px){
 .chapter-main.chapter-overview{gap:30px;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}
 .chapter-eye .structure-content{gap:18px}
}
@media(max-width:760px){
 .header-inner{height:auto;min-height:70px;padding-block:12px;flex-wrap:wrap;gap:4px 18px}
 .case-back{font-size:11px}
 .hero-treatment-list{gap:5px 17px;margin:10px 0 13px}
 .hero-treatment-list li{font-size:14px}
 .case-hero .hero-intro>p:not(.overline){font-size:13px}
 .case-reading-link{margin-top:12px}
 .chapter-main.chapter-overview{grid-template-columns:1fr;gap:0}
 .chapter-treatments{padding:0}
 .structure-details{margin-top:18px}
 .structure-details>summary{padding:16px 12px;gap:12px;min-height:86px}
 .structure-summary-copy{display:block}
 .structure-summary-copy .overline{display:block;margin-bottom:4px}
 .structure-summary-title{font-size:14px}
 .structure-content{padding:0 0 20px}
 .chapter-eye .structure-content{grid-template-columns:1fr;gap:18px}
 .structure-content .muscle-explanation{padding:18px 10px 0}
 .structure-content .muscle-explanation h3{font-size:22px}
}

@media(max-width:760px){
 .chapter-main.chapter-overview>.assessment .assessment-item p{font-size:14px;line-height:1.9}
}